阅读说明：本技术 一种基于电力和燃气互补控制的混合供能控制方法和系统 (Hybrid energy supply control method and system based on electric power and gas complementary control ) 是由 周珊 吕志鹏 宋振浩 杨晓霞 张智慧 刘文龙 魏琛 史超 刘欣厚 孙添一 刘锋 于 2021-06-30 设计创作，主要内容包括：本发明提供一种基于电力和燃气互补控制的混合供能控制方法及系统,其将热系统和燃气系统引入与电网连接的混合供能系统,通过预测混合供能系统的用电负荷功率需求和热负荷功率需求,然后根据所述负荷功率需求与混合供能系统连接的电网输出功率,光伏发电装置输出功率,电池储能装置输出功率进行比较,对所述混合供能系统中的装置进行综合控制。所述方法和系统基于电力和燃气惯量分析的混合供能控制方法,能够充分发挥电能灵活枢纽、高速控制的性能,通过智慧物联终端设备的分布式边缘计算实现快速控制,使混合供能系统在控制时间尺度和精细化程度上有了很大的提高。(The invention provides a hybrid energy supply control method and system based on electric power and gas complementary control, which are characterized in that a thermal system and a gas system are introduced into a hybrid energy supply system connected with a power grid, and the devices in the hybrid energy supply system are comprehensively controlled by predicting the power load power demand and the heat load power demand of the hybrid energy supply system and then comparing the power load power demand with the power grid output power, the photovoltaic power generation device output power and the battery energy storage device output power connected with the hybrid energy supply system according to the load power demand. The method and the system are based on the hybrid energy supply control method of electric power and gas inertia analysis, the flexible hub and high-speed control performance of electric energy can be fully exerted, the fast control is realized through the distributed edge calculation of the intelligent Internet of things terminal equipment, and the control time scale and the refinement degree of the hybrid energy supply system are greatly improved.)

1. A hybrid energy supply control method based on complementary control of electric power and gas is suitable for a hybrid energy supply system, the hybrid energy supply system is connected with a power grid, the hybrid energy supply system further comprises a photovoltaic power generation device for generating electric energy, a battery energy storage device and a micro gas turbine, and the photovoltaic power generation device and the micro gas turbine waste heat recovery system for generating heat energy, and the method is characterized by comprising the following steps:

when the hybrid energy supply system is in grid-connected operation, the output power P of the power grid is acquired_GOutput power P of photovoltaic power generation device_pvOutput power P of the battery energy storage device_bsElectric power P of an electric energy load connected to the hybrid energy supply system_elThermal load power P of thermal energy load_hlAnd the state of charge SOC of the battery energy storage device, wherein P_hl＝η_mth*P_mt+η_ph*P_ph，η_mth、P_mt、η_ph、P_phRespectively generating heat efficiency, total power of the micro gas turbine, heat generation efficiency of the electric heating device and electric energy consumption power of the electric heating device for the waste heat recovery system of the micro gas turbine;

when P is present_ef+P_hf/η_ef≤P_pvThen, the battery energy storage device and the photovoltaic power generation device are controlled based on the SOC, and the heat load power demand value P is obtained_hfControlling the electric heating device, wherein P_efIs a value of the electrical power demand, η_efThe electric heat conversion efficiency when the hybrid energy supply system operates is high;

when P is present_ef+P_hf/η_ef>P_pv+P_G+P_bsThen, based on the SOC, the load state of the power grid comprehensively controls the battery energy storage device, the power grid and the micro gas turbine;

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bsAccording to the heat load power demand value P_hfAnd the power demand value P_efBased on the SOC and the load state of the power grid, the battery energy storage device, the power grid and the micro gas turbineCarrying out comprehensive control on the machine;

electric power P according to electric energy load_elThermal load power P of thermal energy load_hlAnd a predicted heat load power demand value P_hfAnd predicted power demand value P_efCorrecting the power demand of the electrical load and the power demand of the thermal load of the hybrid energy supply system, and enabling the corrected power demand of the electrical load to be P'_efEqual to the electrical load power demand value P_efCorrected thermal load power demand P'_hfEqual to the heat load power demand value P_hf。

2. The method of claim 1, wherein P is P_ef+P_hf/η_ef≤P_pvThen, the battery energy storage device and the photovoltaic power generation device are controlled based on the SOC, and the heat load power demand value P is obtained_hfControlling the electric heating device comprises:

when P is present_ef+P_hf/η_ef≤P_pvIf the SOC is greater than the charging threshold value, the photovoltaic power generation device operates in a limited power mode; and is

When P is present_hfWhen the value is equal to 0, the electric heating device is not started, and when P is equal to_hf>And 0, executing a command of starting the electric heating device.

3. The method of claim 1, wherein P is P_ef+P_hf/η_ef>P_pv+P_G+P_bsAnd when the system is in a state of charge (SOC), the comprehensive control of the battery energy storage device, the power grid and the micro gas turbine by the power grid load state comprises the following steps:

when P is present_ef+P_hf/η_ef>P_pv+P_G+P_bsWhen the power grid is in a load peak period, the photovoltaic power generation device runs at full power, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started;

when P is present_ef+P_hf/η_ef>P_pv+P_G+P_bsAnd when the power grid is in the non-load peak period, the photovoltaic power generation device runs at full power, the electric energy of the power grid is preferentially used, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started.

4. The method of claim 1, wherein P is P_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bsAccording to the heat load power demand value P_hfAnd the power demand value P_efBased on state of charge SOC, the electric wire netting load state carries out integrated control to battery energy memory, electric wire netting, electro-heat equipment and miniature gas turbine and includes:

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_hfWhen the load peak time is equal to 0, if the power grid is in the load peak time period, the photovoltaic power generation device runs at full power, and a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC); if the power grid is in the non-load peak period, the photovoltaic power generation device runs at full power and preferentially uses the power grid electric energy, and when the power grid electric energy still cannot meet the load power demand, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC);

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_ef<P_pv，P_hf>When the power is 0, the photovoltaic power generation device runs at full power and executes a starting instruction of the electric heating device;

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_ef>P_pv，P_hf>When the power grid is in the peak load period, the photovoltaic power generation device runs at full power, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started after the electric heating device is started for time t; if the power grid is in the non-load peak period, the photovoltaic power generation deviceAnd when the electric energy of the power grid still cannot meet the load power requirement, executing a discharge instruction on the battery energy storage device according to the state of charge (SOC), and starting the micro gas turbine after the electric heating device is started for a time t.

5. The method of claim 4, wherein starting the micro gas turbine after the time t for starting the electric heating device comprises starting the micro gas turbine according to a power distribution ratio λ between the electric heating device and the micro gas turbine_eh、λ_mtControl is carried out, wherein_eh+λ_mtThe micro gas turbine operates at rated power, and the operation power of the electric heating device is gradually reduced as 1.

6. A hybrid energy supply control system based on complementary control of electric power and gas, which is suitable for a hybrid energy supply system, the hybrid energy supply system is connected with a power grid, and comprises a photovoltaic power generation device for generating electric energy, a battery energy storage device and a micro gas turbine, and an electric device for generating heat energy and a micro gas turbine waste heat recovery system, wherein the hybrid energy supply control system comprises:

a data acquisition unit for acquiring the output power P of the power grid when the hybrid energy supply system is in grid-connected operation_GOutput power P of photovoltaic power generation device_pvOutput power P of the battery energy storage device_bsElectric power P of an electric energy load connected to the hybrid energy supply system_elThermal load power P of thermal energy load_hlAnd the state of charge SOC of the battery energy storage device, wherein P_hl＝η_mth*P_mt+η_ph*P_ph，η_mth、P_mt、η_ph、P_phRespectively generating heat efficiency, total power of the micro gas turbine, heat generation efficiency of the electric heating device and electric energy consumption power of the electric heating device for the waste heat recovery system of the micro gas turbine;

a first control unit for controlling P_ef+P_hf/η_ef≤P_pvBased on the said loadThe battery energy storage device and the photovoltaic power generation device are controlled by the state of charge SOC, and the heat load power demand value P is obtained_hfControlling the electric heating device, wherein P_efIs a value of the electrical power demand, η_efThe electric heat conversion efficiency when the hybrid energy supply system operates is high;

a second control unit for controlling P_ef+P_hf/η_ef>P_pv+P_G+P_bsThen, based on the SOC, the load state of the power grid comprehensively controls the battery energy storage device, the power grid and the micro gas turbine;

a third control unit for when P_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bsAccording to the heat load power demand value P_hfAnd the power demand value P_efComprehensively controlling a battery energy storage device, a power grid and the micro gas turbine based on the SOC and the power grid load state;

a power correction unit for using the electric power P according to the electric energy load_elThermal load power P of thermal energy load_hlAnd a predicted heat load power demand value P_hfAnd predicted power demand value P_efCorrecting the power demand of the electrical load and the power demand of the thermal load of the hybrid energy supply system, and enabling the corrected power demand of the electrical load to be P'_efEqual to the electrical load power demand value P_efCorrected thermal load power demand P'_hfEqual to the heat load power demand value P_hf。

7. The hybrid energy supply control system of claim 6 wherein said first control unit is designated as P_ef+P_hf/η_ef≤P_pvThen, the battery energy storage device and the photovoltaic power generation device are controlled based on the SOC, and the heat load power demand value P is obtained_hfControlling the electric heating device comprises:

when P is present_ef+P_hf/η_ef≤P_pvIf the SOC is less than the charging threshold,charging the energy storage battery, supplying power to the photovoltaic power generation device, and if the SOC is greater than a charging threshold value, limiting the power of the photovoltaic power generation device to operate; and is

When P is present_hfWhen the value is equal to 0, the electric heating device is not started, and when P is equal to_hf>And 0, executing a command of starting the electric heating device.

8. The hybrid energy supply control system of claim 6 wherein said second control unit is designated as P_ef+P_hf/η_ef>P_pv+P_G+P_bsAnd when the system is in a state of charge (SOC), the comprehensive control of the battery energy storage device, the power grid and the micro gas turbine by the power grid load state comprises the following steps:

when P is present_ef+P_hf/η_ef>P_pv+P_G+P_bsWhen the power grid is in a load peak period, the photovoltaic power generation device runs at full power, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started;

when P is present_ef+P_hf/η_ef>P_pv+P_G+P_bsAnd when the power grid is in the non-load peak period, the photovoltaic power generation device runs at full power, the electric energy of the power grid is preferentially used, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started.

9. The hybrid power supply control system of claim 6 wherein said third control unit is designated as P_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bsAccording to the heat load power demand value P_hfAnd the power demand value P_efBased on state of charge SOC, the electric wire netting load state carries out integrated control to battery energy memory, electric wire netting, electro-heat equipment and miniature gas turbine and includes:

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_hfWhen the load is 0, if the power grid is in the peak load period, the photovoltaic generatorThe electric device runs at full power, and executes a discharging instruction to the battery energy storage device according to the state of charge (SOC); if the power grid is in the non-load peak period, the photovoltaic power generation device runs at full power and preferentially uses the power grid electric energy, and when the power grid electric energy still cannot meet the load power demand, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC);

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_ef<P_pv，P_hf>When the power is 0, the photovoltaic power generation device runs at full power and executes a starting instruction of the electric heating device;

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_ef>P_pv，P_hf>When the power grid is in the peak load period, the photovoltaic power generation device runs at full power, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started after the electric heating device is started for time t; if the power grid is in the non-load peak period, the photovoltaic power generation device runs at full power and preferentially uses the power of the power grid, when the power of the power grid still cannot meet the load power demand, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started after the electric heating device is started for time t.

10. The hybrid power supply control system according to claim 9, wherein the third control unit starting the micro gas turbine after the electric heating device starting time t includes a power division ratio λ of the electric heating device and the micro gas turbine after the micro gas turbine is started_eh、λ_mtControl is carried out, wherein_eh+λ_mtThe micro gas turbine operates at rated power, and the operation power of the electric heating device is gradually reduced as 1.

Technical Field

The invention relates to the field of distributed energy control, in particular to a hybrid energy supply control method and system based on complementary control of electric power and gas.

Background

At present, with the development of diversification of an integrated energy supply device, a hybrid energy supply system is gradually formed, the topology is flexible, the trend is controllable, the hybrid energy supply system is a miniature of an energy internet, and the research on energy management optimization has important significance on the development of the energy internet. Through organic coordination and close cooperation among different energy systems, peak shifting and valley filling of various energy loads are realized, and the equipment utilization rate level of the corresponding energy supply system is improved. There is a pressing need to construct a clean and efficient hybrid energy supply system on the user side that can consume renewable energy.

At present, demands of a user side in a hybrid energy supply system are increasingly diversified, the management and analysis of the demand side of a user-level comprehensive energy system are in a starting stage, and ideas such as mutual energy assistance and price game are not widely popularized. The coupling and integration of the hybrid energy supply system are low, and the operation modes of the energy systems which are independent or simply combined cannot adapt to the requirement of multi-energy complementation of the comprehensive energy system, so that the robustness of the system and the utilization efficiency of energy are influenced.

Disclosure of Invention

In order to solve the technical problems that the coupling and integration of a hybrid energy supply system are low, and the operation mode of each energy system which is independent or simply combined cannot meet the requirement of multi-energy complementation of an integrated energy system in the prior art, the invention provides a hybrid energy supply control method based on complementary control of electric power and gas, which is suitable for the hybrid energy supply system, wherein the hybrid energy supply system is connected with a power grid, and further comprises a photovoltaic power generation device, a battery energy storage device and a micro gas turbine for generating electric power, and an electric device and a micro gas turbine waste heat recovery system for generating heat energy, and the method comprises the following steps:

when the hybrid energy supply system is in grid-connected operation, the output power P of the power grid is acquired_GOutput power P of photovoltaic power generation device_pvOutput power P of the battery energy storage device_bsElectric power P of an electric energy load connected to the hybrid energy supply system_elThermal load power P of thermal energy load_hlAnd the state of charge SOC of the battery energy storage device, wherein P_hl＝η_mth*P_mt+η_ph*P_ph，η_mth、P_mt、η_ph、P_phRespectively generating heat efficiency, total power of the micro gas turbine, heat generation efficiency of the electric heating device and electric energy consumption power of the electric heating device for the waste heat recovery system of the micro gas turbine;

when P is present_ef+P_hf/η_ef≤P_pvThen, the battery energy storage device and the photovoltaic power generation device are controlled based on the SOC, and the heat load power demand value P is obtained_hfControlling the electric heating device, wherein P_efIs a value of the electrical power demand, η_efThe electric heat conversion efficiency when the hybrid energy supply system operates is high;

when P is present_ef+P_hf/η_ef>P_pv+P_G+P_bsThen, based on the SOC, the load state of the power grid comprehensively controls the battery energy storage device, the power grid and the micro gas turbine;

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bsAccording to the heat load power demand value P_hfAnd the power demand value P_efComprehensively controlling a battery energy storage device, a power grid and the micro gas turbine based on the SOC and the power grid load state;

electric power P according to electric energy load_elThermal load power P of thermal energy load_hlAnd a predicted heat load power demand value P_hfAnd predicted power demand value P_efCorrecting the power demand of the electrical load and the power demand of the thermal load of the hybrid energy supply system, and enabling the corrected power demand of the electrical load to be P'_efEqual to the electrical load power demand value P_efCorrected thermal load power demand P'_hfEqual to the heat load power demand value P_hf。

Further, when P is_ef+P_hf/η_ef≤P_pvThen, the battery energy storage device and the photovoltaic power generation device are controlled based on the SOC, and the heat load power demand value P is obtained_hfControl of electric heating deviceThe preparation method comprises the following steps:

when P is present_ef+P_hf/η_ef≤P_pvIf the SOC is greater than the charging threshold value, the photovoltaic power generation device operates in a limited power mode; and is

When P is present_hfWhen the value is equal to 0, the electric heating device is not started, and when P is equal to_hf>And 0, executing a command of starting the electric heating device.

Further, when P is_ef+P_hf/η_ef>P_pv+P_G+P_bsAnd when the system is in a state of charge (SOC), the comprehensive control of the battery energy storage device, the power grid and the micro gas turbine by the power grid load state comprises the following steps:

when P is present_ef+P_hf/η_ef>P_pv+P_G+P_bsWhen the power grid is in a load peak period, the photovoltaic power generation device runs at full power, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started;

when P is present_ef+P_hf/η_ef>P_pv+P_G+P_bsAnd when the power grid is in the non-load peak period, the photovoltaic power generation device runs at full power, the electric energy of the power grid is preferentially used, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started.

Further, when P is_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bsAccording to the heat load power demand value P_hfAnd the power demand value P_efBased on state of charge SOC, the electric wire netting load state carries out integrated control to battery energy memory, electric wire netting, electro-heat equipment and miniature gas turbine and includes:

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_hfWhen the load peak time is equal to 0, if the power grid is in the load peak time period, the photovoltaic power generation device runs at full power, and a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC); if the electric networkIn the non-load peak period, the photovoltaic power generation device runs at full power, the electric energy of a power grid is preferentially used, and when the electric energy of the power grid still cannot meet the load power demand, a discharging instruction is executed on the battery energy storage device according to the SOC;

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_ef<P_pv，P_hf>When the power is 0, the photovoltaic power generation device runs at full power and executes a starting instruction of the electric heating device;

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_ef>P_pv，P_hf>When the power grid is in the peak load period, the photovoltaic power generation device runs at full power, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started after the electric heating device is started for time t; if the power grid is in the non-load peak period, the photovoltaic power generation device runs at full power and preferentially uses the power of the power grid, when the power of the power grid still cannot meet the load power demand, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started after the electric heating device is started for time t.

Further, the step of starting the micro gas turbine after the time t for starting the electric heating device comprises the step of starting the micro gas turbine according to the power distribution ratio lambda of the electric heating device and the micro gas turbine_eh、λ_mtControl is carried out, wherein_eh+λ_mtThe micro gas turbine operates at rated power, and the operation power of the electric heating device is gradually reduced as 1.

According to another aspect of the present invention, the present invention provides a hybrid energy supply control system based on complementary control of power and gas, which is suitable for a hybrid energy supply system, the hybrid energy supply system is connected with a power grid, and further comprises a photovoltaic power generation device for generating electric energy, a battery energy storage device and a micro gas turbine, and an electric device for generating heat energy and a micro gas turbine waste heat recovery system, the hybrid energy supply control system comprises:

data ofThe acquisition unit is used for acquiring the output power P of the power grid when the hybrid energy supply system operates in a grid-connected mode_GOutput power P of photovoltaic power generation device_pvOutput power P of the battery energy storage device_bsElectric power P of an electric energy load connected to the hybrid energy supply system_elThermal load power P of thermal energy load_hlAnd the state of charge SOC of the battery energy storage device, wherein P_hl＝η_mth*P_mt+η_ph*P_ph，η_mth、P_mt、η_ph、P_phRespectively generating heat efficiency, total power of the micro gas turbine, heat generation efficiency of the electric heating device and electric energy consumption power of the electric heating device for the waste heat recovery system of the micro gas turbine;

a first control unit for controlling P_ef+P_hf/η_ef≤P_pvThen, the battery energy storage device and the photovoltaic power generation device are controlled based on the SOC, and the heat load power demand value P is obtained_hfControlling the electric heating device, wherein P_efIs a value of the electrical power demand, η_efThe electric heat conversion efficiency when the hybrid energy supply system operates is high;

a second control unit for controlling P_ef+P_hf/η_ef>P_pv+P_G+P_bsThen, based on the SOC, the load state of the power grid comprehensively controls the battery energy storage device, the power grid and the micro gas turbine;

a third control unit for when P_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bsAccording to the heat load power demand value P_hfAnd the power demand value P_efComprehensively controlling a battery energy storage device, a power grid and the micro gas turbine based on the SOC and the power grid load state;

a power correction unit for using the electric power P according to the electric energy load_elThermal load power P of thermal energy load_hlAnd a predicted heat load power demand value P_hfAnd predicted power demand value P_efCorrecting the power demand of the electrical load and the power demand of the thermal load of the hybrid energy supply system, and enabling the corrected power demand of the electrical load to be P'_efEqual to the electrical load power demand value P_efCorrected thermal load power demand P'_hfEqual to the heat load power demand value P_hf。

Further, the first control unit is P_ef+P_hf/η_ef≤P_pvThen, the battery energy storage device and the photovoltaic power generation device are controlled based on the SOC, and the heat load power demand value P is obtained_hfControlling the electric heating device comprises:

when P is present_ef+P_hf/η_ef≤P_pvIf the SOC is greater than the charging threshold value, the photovoltaic power generation device operates in a limited power mode; and is

When P is present_hfWhen the value is equal to 0, the electric heating device is not started, and when P is equal to_hf>And 0, executing a command of starting the electric heating device.

Further, the second control unit is P_ef+P_hf/η_ef>P_pv+P_G+P_bsAnd when the system is in a state of charge (SOC), the comprehensive control of the battery energy storage device, the power grid and the micro gas turbine by the power grid load state comprises the following steps:

when P is present_ef+P_hf/η_ef>P_pv+P_G+P_bsWhen the power grid is in a load peak period, the photovoltaic power generation device runs at full power, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started;

when P is present_ef+P_hf/η_ef>P_pv+P_G+P_bsAnd when the power grid is in the non-load peak period, the photovoltaic power generation device runs at full power, the electric energy of the power grid is preferentially used, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started.

Further, the third control unit is P_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bsAccording to the heat load power demand value P_hfAnd the power demand value P_efBased on state of charge SOC, the electric wire netting load state carries out integrated control to battery energy memory, electric wire netting, electro-heat equipment and miniature gas turbine and includes:

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_hfWhen the load peak time is equal to 0, if the power grid is in the load peak time period, the photovoltaic power generation device runs at full power, and a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC); if the power grid is in the non-load peak period, the photovoltaic power generation device runs at full power and preferentially uses the power grid electric energy, and when the power grid electric energy still cannot meet the load power demand, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC);

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_ef<P_pv，P_hf>When the power is 0, the photovoltaic power generation device runs at full power and executes a starting instruction of the electric heating device;

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_ef>P_pv，P_hf>When the power grid is in the peak load period, the photovoltaic power generation device runs at full power, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started after the electric heating device is started for time t; if the power grid is in the non-load peak period, the photovoltaic power generation device runs at full power and preferentially uses the power of the power grid, when the power of the power grid still cannot meet the load power demand, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started after the electric heating device is started for time t.

Further, the third control unit starts the micro gas turbine after the time t for starting the electric heating device comprises the step of starting the micro gas turbine according to the power distribution ratio lambda of the electric heating device and the micro gas turbine_eh、λ_mtControl is carried out, wherein_eh+λ_mtThe micro gas turbine operates at rated power, and the operation power of the electric heating device is gradually reduced as 1.

According to the hybrid energy supply control method and system based on electric power and gas complementary control, a thermal system and a gas system are introduced into a hybrid energy supply system connected with a power grid to form the hybrid energy supply system, and the devices in the hybrid energy supply system are comprehensively controlled by predicting the power load power demand and the heat load power demand of the hybrid energy supply system and comparing the power load power demand with the power grid output power, the photovoltaic power generation device output power and the battery energy storage device output power connected with the hybrid energy supply system. The hybrid energy supply control method and system based on the complementary control of the electric power and the gas have the following advantages:

(1) the invention makes full use of the micro gas turbine and the waste heat recovery system to provide electricity and heat energy at the same time, thereby realizing the complementary substitution of the electricity and the heat energy;

(2) the invention fully utilizes the characteristics of flexible pivot and high-speed control performance of electric energy through the coupling of various energy systems such as electricity, gas, heat and the like, realizes the edge calculation and control of supplementing the gas by electricity, and quickly meets the requirements of electric energy and heat energy at the user side;

(3) the invention realizes the rapid conversion and control from electricity to heat, from gas to heat and from gas to electricity, can not only exert the economic advantages of continuous operation of large inertia systems such as gas energy, heat energy and the like, but also utilize the advantages of rapid and efficient operation of small inertia systems of electric energy;

(4) the hybrid energy supply system can realize quick response to user requirements and power grid states, fully excavates the space-time coupling and complementary substitution of the hybrid energy supply system in electricity and heat, and improves the overall efficiency and the energy supply reliability of the hybrid energy supply system;

(5) the invention fully utilizes the battery energy storage device to provide supplement and regulation for the supply of energy such as electricity, heat and the like during the peak load period of the power grid, reduces the overall energy consumption cost of the system and weakens the influence of the energy supply during the peak load period on the power grid.

Drawings

A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:

FIG. 1 is a schematic structural view of a hybrid power supply system according to a preferred embodiment of the present invention;

FIG. 2 is a flow chart of a hybrid energy supply control method based on complementary control of electric power and gas according to a preferred embodiment of the present invention;

fig. 3 is a schematic structural diagram of a hybrid energy supply control system based on complementary control of electric power and gas according to a preferred embodiment of the present invention.

Detailed Description

The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.

Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.

Fig. 1 is a schematic configuration diagram of a hybrid power supply system according to a preferred embodiment of the present invention. As shown in fig. 1, the preferred embodiment is applicable to a hybrid energy supply system, which is connected to a power grid, and further includes a photovoltaic power generation device for generating electric energy, a battery energy storage device and a micro gas turbine, and an electric heating device for generating heat energy and a micro gas turbine waste heat recovery system, wherein the electric heating device includes a heat pump and an electric auxiliary heat device. In addition, the hybrid energy supply system of the preferred embodiment further comprises a heat storage device, and on the user side, the electric loads comprise AC electric loads and DC electric loads, and the heat loads comprise domestic water loads, air-conditioning heat loads and the like.

Fig. 2 is a flowchart of a hybrid power supply control method based on complementary control of electric power and gas according to a preferred embodiment of the present invention. As shown in fig. 2, the hybrid energy supply control method 200 based on complementary control of electric power and gas according to the preferred embodiment starts with step 201.

In step 201, when the hybrid energy supply system is in grid-connected operation, the output power P of the power grid is collected_GOutput power P of photovoltaic power generation device_pvOutput power P of the battery energy storage device_bsElectric power P of an electric energy load connected to the hybrid energy supply system_elThermal load power P of thermal energy load_hlAnd the state of charge SOC of the battery energy storage device, wherein P_hl＝η_mth*P_mt+η_ph*P_ph，η_mth、P_mt、η_ph、P_phThe heat recovery efficiency of the micro gas turbine, the total power of the micro gas turbine, the heat generation efficiency of the electric heating device and the power consumed by the electric heating device are respectively generated for the waste heat recovery system of the micro gas turbine. It should be noted that the method is only suitable for grid-connected operation of the hybrid energy supply system, and when the system is in an off-grid operation state, the method can only be restarted after the grid connection. Furthermore, the method is applicable to the air conditioning load on the user side of the hybrid energy supply system when it is used for heating, but is not applicable to control when it is used for cooling.

In step 202, when P_ef+P_hf/η_ef≤P_pvThen, the battery energy storage device and the photovoltaic power generation device are controlled based on the SOC, and the heat load power demand value P is obtained_hfControlling the electric heating device, wherein P_efIs a value of the electrical power demand, η_efThe electric heat conversion efficiency of the hybrid energy supply system during operation is shown. The heat load power requirement in the method is a prediction that has considered the heat storage power that the heat storage device is capable of providing. The electric power demand value and the thermal load power demand value when no heat storage device is present in the hybrid energy supply systemThe evaluation is an initial value based on historical data of the consumer-side electrical load and the thermal energy load.

Preferably, said P is_ef+P_hf/η_ef≤P_pvThen, the battery energy storage device and the photovoltaic power generation device are controlled based on the SOC, and the heat load power demand value P is obtained_hfControlling the electric heating device comprises:

when P is present_ef+P_hf/η_ef≤P_pvIf the SOC is greater than the charging threshold value, the photovoltaic power generation device operates in a limited power mode; and is

When P is present_hfWhen the value is equal to 0, the electric heating device is not started, and when P is equal to_hf>And 0, executing a command of starting the electric heating device.

Satisfy P when the hybrid energy supply system is in grid-connected operation_ef+P_hf/η_ef≤P_pvWhen the output shaft power of the photovoltaic power generation device is larger than the real-time requirements of the electrical load and the thermal load of the system, the SOC can be set<And when the SOC is more than or equal to 90%, the photovoltaic power generation device is in limited power operation. In addition, the instruction for starting the electric heating device is executed, and the judgment on the heat load power demand and the electric heating device capacity is included, for example, in the preferred embodiment, the electric heating device comprises a heat pump and an electric auxiliary heating device, so that when the heat pump power configuration is larger, the electric auxiliary heating device power configuration is smaller, the heat pump device is started when the heat load demand power is larger, and the electric auxiliary heating device is started when the heat load demand is smaller in the system.

In step 203, when P_ef+P_hf/η_ef>P_pv+P_G+P_bsAnd then, based on the SOC and the load state of the power grid, the battery energy storage device, the power grid and the micro gas turbine are comprehensively controlled.

Preferably, said P is_ef+P_hf/η_ef>P_pv+P_G+P_bsThen, based on the SOC, the load state of the power grid is used for storing energy and electricity of the batteryThe comprehensive control of the net and the micro gas turbine comprises the following steps:

when P is present_ef+P_hf/η_ef>P_pv+P_G+P_bsWhen the power grid is in a load peak period, the photovoltaic power generation device runs at full power, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started;

when P is present_ef+P_hf/η_ef>P_pv+P_G+P_bsAnd when the power grid is in the non-load peak period, the photovoltaic power generation device runs at full power, the electric energy of the power grid is preferentially used, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started.

In step 204, when P is_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bsAccording to the heat load power demand value P_hfAnd the power demand value P_efAnd comprehensively controlling the battery energy storage device, the power grid and the micro gas turbine based on the SOC and the power grid load state.

Preferably, said P is_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bsAccording to the heat load power demand value P_hfAnd the power demand value P_efBased on state of charge SOC, the electric wire netting load state carries out integrated control to battery energy memory, electric wire netting, electro-heat equipment and miniature gas turbine and includes:

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_hfWhen the load peak time is equal to 0, if the power grid is in the load peak time period, the photovoltaic power generation device runs at full power, and a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC); if the power grid is in the non-load peak period, the photovoltaic power generation device runs at full power and preferentially uses the power grid electric energy, and when the power grid electric energy still cannot meet the load power demand, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC);

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_ef<P_pv，P_hf>When the power is 0, the photovoltaic power generation device runs at full power and executes a starting instruction of the electric heating device;

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_ef>P_pv，P_hf>When the power grid is in the peak load period, the photovoltaic power generation device runs at full power, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started after the electric heating device is started for time t; if the power grid is in the non-load peak period, the photovoltaic power generation device runs at full power and preferentially uses the power of the power grid, when the power of the power grid still cannot meet the load power demand, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started after the electric heating device is started for time t.

Preferably, the step of starting the micro gas turbine after the time t for starting the electric heating device comprises the step of starting the micro gas turbine according to the power distribution ratio lambda of the electric heating device and the micro gas turbine_eh、λ_mtControl is carried out, wherein_eh+λ_mtThe micro gas turbine operates at rated power, and the operation power of the electric heating device is gradually reduced as 1. And determining a specific value of the delay time t according to the judgment of the heat load power demand, wherein the larger the heat load power demand is, the larger the value of the delay time t is, so as to meet the compensation effect of supplementing air with electricity.

In step 205, the power consumption P is determined according to the electrical energy load_elThermal load power P of thermal energy load_hlAnd a predicted heat load power demand value P_hfAnd predicted power demand value P_efCorrecting the power demand of the electrical load and the power demand of the thermal load of the hybrid energy supply system, and enabling the corrected power demand of the electrical load to be P'_efEqual to the electrical load power demand value P_efCorrected thermal load power demand P'_hfEqual to the heat load power demand value P_hf。

Fig. 3 is a schematic structural diagram of a hybrid energy supply control system based on complementary control of electric power and gas according to a preferred embodiment of the present invention. As shown in fig. 3, the hybrid energy supply control system 300 according to the present preferred embodiment based on complementary control of electric power and gas includes:

a data acquisition unit 301 for acquiring the grid output power P when the hybrid energy supply system is in grid-connected operation_GOutput power P of photovoltaic power generation device_pvOutput power P of the battery energy storage device_bsElectric power P of an electric energy load connected to the hybrid energy supply system_elThermal load power P of thermal energy load_hlAnd the state of charge SOC of the battery energy storage device, wherein P_hl＝η_mth*P_mt+η_ph*P_ph，η_mth、P_mt、η_ph、P_phThe heat recovery efficiency of the micro gas turbine, the total power of the micro gas turbine, the heat generation efficiency of the electric heating device and the power consumed by the electric heating device are respectively generated for the waste heat recovery system of the micro gas turbine.

A first control unit 302 for P_ef+P_hf/η_ef≤P_pvThen, the battery energy storage device and the photovoltaic power generation device are controlled based on the SOC, and the heat load power demand value P is obtained_hfControlling the electric heating device, wherein P_efIs a value of the electrical power demand, η_efThe electric heat conversion efficiency when the hybrid energy supply system operates is high;

a second control unit 303 for controlling the operation of the second control unit when P is detected_ef+P_hf/η_ef>P_pv+P_G+P_bsThen, based on the SOC, the load state of the power grid comprehensively controls the battery energy storage device, the power grid and the micro gas turbine;

a third control unit 304 for controlling P_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bsAccording to the heat load power demand value P_hfAnd the power demand value P_efBased on the SOC and the load state of the power grid, the battery energy storage device, the power grid and the micro gas turbine are operatedPerforming comprehensive control;

a power correction unit 305 for using the electric power P according to the electric energy load_elThermal load power P of thermal energy load_hlAnd a predicted heat load power demand value P_hfAnd predicted power demand value P_efCorrecting the power demand of the electrical load and the power demand of the thermal load of the hybrid energy supply system, and enabling the corrected power demand of the electrical load to be P'_efEqual to the electrical load power demand value P_efCorrected thermal load power demand P'_hfEqual to the heat load power demand value P_hf。

Preferably, the first control unit 302 is P_ef+P_hf/η_ef≤P_pvThen, the battery energy storage device and the photovoltaic power generation device are controlled based on the SOC, and the heat load power demand value P is obtained_hfControlling the electric heating device comprises:

when P is present_ef+P_hf/η_ef≤P_pvIf the SOC is greater than the charging threshold value, the photovoltaic power generation device operates in a limited power mode; and is

When P is present_hfWhen the value is equal to 0, the electric heating device is not started, and when P is equal to_hf>And 0, executing a command of starting the electric heating device.

Preferably, the second control unit 303 is P_ef+P_hf/η_ef>P_pv+P_G+P_bsAnd when the system is in a state of charge (SOC), the comprehensive control of the battery energy storage device, the power grid and the micro gas turbine by the power grid load state comprises the following steps:

when P is present_ef+P_hf/η_ef>P_pv+P_G+P_bsWhen the power grid is in a load peak period, the photovoltaic power generation device runs at full power, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started;

when P is present_ef+P_hf/η_ef>P_pv+P_G+P_bsAnd the power grid is non-loadedAnd during the peak time period, the photovoltaic power generation device runs at full power, preferentially uses the electric energy of the power grid, executes a discharging instruction to the battery energy storage device according to the state of charge (SOC), and starts the micro gas turbine.

Preferably, the third control unit 304 is P_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bsAccording to the heat load power demand value P_hfAnd the power demand value P_efBased on state of charge SOC, the electric wire netting load state carries out integrated control to battery energy memory, electric wire netting, electro-heat equipment and miniature gas turbine and includes:

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_hfWhen the load peak time is equal to 0, if the power grid is in the load peak time period, the photovoltaic power generation device runs at full power, and a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC); if the power grid is in the non-load peak period, the photovoltaic power generation device runs at full power and preferentially uses the power grid electric energy, and when the power grid electric energy still cannot meet the load power demand, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC);

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_ef<P_pv，P_hf>When the power is 0, the photovoltaic power generation device runs at full power and executes a starting instruction of the electric heating device;

when P is present_pv<P_ef+P_hf/η_ef≤P_pv+P_G+P_bs，P_ef>P_pv，P_hf>When the power grid is in the peak load period, the photovoltaic power generation device runs at full power, a discharging instruction is executed on the battery energy storage device according to the state of charge (SOC), and the micro gas turbine is started after the electric heating device is started for time t; if the power grid is in the non-load peak period, the photovoltaic power generation device runs at full power and preferentially uses the power grid electric energy, when the power grid electric energy still cannot meet the load power demand, a discharging instruction is executed on the battery energy storage device according to the SOC, and the battery energy storage device is startedAnd starting the micro gas turbine after the time t of the electric heating device.

Preferably, the third control unit 304 starts the micro gas turbine after the time t for starting the electric heating device includes starting the micro gas turbine, and then dividing the power of the electric heating device into the power of the micro gas turbine according to the power dividing ratio λ_eh、λ_mtControl is carried out, wherein_eh+λ_mtThe micro gas turbine operates at rated power, and the operation power of the electric heating device is gradually reduced as 1.

The steps of the hybrid energy supply control system based on the complementary control of the electric power and the gas for meeting the electric energy and the heat energy requirements of the user side are the same as the steps adopted by the hybrid energy supply control method based on the complementary control of the electric power and the gas, the achieved technical effects are the same, and the details are not repeated.

The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.

Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.