阅读说明：本技术 一种综合能源电网控制系统 (Comprehensive energy power grid control system ) 是由 孙炜哲 王子驰 雷炳银 侯葵 孙荣智 周银锋 苏雨晴 徐立军 刘健 于 2021-09-03 设计创作，主要内容包括：本发明涉及一种综合能源电网控制系统,属于电网能源管控技术领域。本发明采用四层架构,能够为微网调度提供各种实时信息,对微网进行调度决策管理与控制,保证微网安全运行,提高微网质量和改善微网运行的经济性,同时具有离网运行、并网两种常态运行模式与离网转并网、并网转离网两种暂态运行模式,不仅能够在两种常态运行模式下稳定运行,而且也能够保证两种暂态运行模式的可靠性。(The invention relates to a comprehensive energy power grid control system, and belongs to the technical field of power grid energy management and control. The invention adopts a four-layer framework, can provide various real-time information for the micro-grid scheduling, carries out scheduling decision management and control on the micro-grid, ensures the safe operation of the micro-grid, improves the quality of the micro-grid and improves the economical efficiency of the micro-grid operation, and simultaneously has two normal operation modes of off-grid operation and grid connection, and two transient operation modes of off-grid connection to grid connection and grid connection to off-grid connection, so that the invention not only can stably operate in the two normal operation modes, but also can ensure the reliability of the two transient operation modes.)

1. An integrated energy grid control system, characterized in that, this control system adopts four layers of framework, includes:

a computer system layer comprising a real-time database, a relational database, a computer operating system, and a computer network;

the supporting platform comprises a system resource management module and a graph-model-library integrated module, wherein the system resource management module is used for node monitoring, process monitoring management and file transmission and synchronization, and the model-library integrated module is used for importing and exporting measurement model data, equipment model data and graphs and primitive data, editing the primitives, editing the graph configuration and converting the graphs;

the monitoring application layer comprises a micro-grid operation mode control module, a grid-connected interface device and a grid-connected interface device, wherein the micro-grid operation mode control module is used for switching a micro-grid parallel operation mode and a micro-grid off-grid operation mode, issuing a mode switching command to the distributed power supply and the grid-connected interface device, selecting power failure switching or smooth switching when the parallel operation mode and the off-grid operation mode are switched, automatically switching from the micro-grid-connected operation control mode to the off-grid operation control mode when the power grid fails, and after the power grid failure is recovered, automatically executing micro-selection or receiving a superior command when the micro-grid is switched from the off-grid operation to the grid-connected operation;

energy management application layer, including voltage reactive management module for optimize the setting to the operation of little grid reactive voltage, reactive voltage operation mode can include: the power factor control mode of the grid-connected point, the reactive power control mode of the grid-connected point, the voltage control mode or the off-grid reactive power balance mode, and a parameter set value or range is given according to the selected control mode.

2. The integrated energy grid control system according to claim 1, wherein the monitoring application layer adopts the following method when switching the grid-connected and off-grid operation mode of the microgrid:

1) the photovoltaic cell should keep an MPPT mode, when the output of the photovoltaic cell is larger than the load consumption and the storage battery is fully charged, the photovoltaic cell should work in a constant voltage mode, when the output of the photovoltaic cell is smaller than the load consumption or the output of the photovoltaic cell is zero, the storage battery has stored energy and should work in a discharge mode;

2) the storage battery stores energy of 0, when the photovoltaic output is continuously increased but is smaller than the load consumption, the storage battery stops running, the photovoltaic output exceeds the load consumption of the micro-grid, the storage battery is not fully charged, and the storage battery is charged;

3) when the photovoltaic output exceeds the load consumption of the micro-grid, the micro-gas turbine works in a low-output operation mode, when the load demand is continuously increased, the photovoltaic cell and the storage battery cannot meet the load power demand, the output power is increased by the micro-gas turbine, and when the photovoltaic power generation is finished and the energy storage of the energy storage device is zero, the micro-gas turbine completely supplies power.

3. The integrated energy grid control system according to claim 1, wherein the computer operating system is one of windows, linux, or unix, and the relational database is one of oracle, mysql, or sqlserver.

4. The integrated energy power grid control system according to claim 1 or 2, wherein the support platform further comprises a right management module, the right management module is used for giving different rights and right validity periods to personnel according to different work functions and work properties, the rights and right validity periods comprise hierarchical right management, right binding and right configuration, hierarchical management is adopted, user password setting and right distribution are performed, password limitation is performed according to related contents of services, all operators are authorized to perform identity and right authentication, and specified system functions and operation ranges are used according to authorized rights.

5. The integrated energy power grid control system according to claim 4, wherein the support platform further comprises a database management module, the database management module is used for maintaining, synchronizing, backing up and recovering the database, provides a uniform real-time or quasi real-time data interface for external use, and can perform access control according to authority and type.

6. The integrated energy power grid control system according to claim 4, wherein the support platform further comprises a system clock time synchronization module and a report processing module, wherein the system clock time synchronization module is used for synchronizing the time according to the received signal of the satellite positioning system and synchronizing the clocks of the relevant devices in the station; the report processing module is used for selecting historical data according to requirements, generating reports with different formats and types, and the reports support file export and printing.

7. The integrated energy grid control system according to claim 1 or 2, wherein the monitoring application layer comprises an anti-misoperation locking module, the anti-misoperation locking module is based on a conventional anti-misoperation locking function of a predefined rule and an anti-misoperation locking function based on topology analysis, adopts an anti-misoperation verification legal operation instruction, and should alarm and lock the instruction execution when an error occurs, and the control objects of the equipment on-off control range from a circuit breaker, a load switch, a disconnecting switch, a grounding disconnecting switch, a main transformer tap and a reactive compensation equipment.

8. The integrated energy grid control system according to claim 7, wherein the monitoring application layer further comprises an equipment on-off control module, the equipment on-off control module has two control modes of automatic control and manual control, the control operation level is from high to low, and the on-site monitoring and the remote control are performed, when the manual control equipment is turned off, the microgrid monitoring system has an operation monitoring function, a guardian can monitor the on-site monitoring or another operator station, and three steps of selecting, correcting and executing are performed on the on-off equipment in the microgrid monitoring system.

9. The integrated energy grid control system according to claim 1 or 2, wherein the energy management application layer comprises a power generation prediction module, the power generation prediction module is used for performing power generation prediction according to historical data and measured data, receiving power generation prediction data of the power prediction system, and configuring a corresponding power prediction function of wind power generation or photovoltaic power generation for a microgrid system comprising wind power generation and photovoltaic generation intermittent power generation modes.

10. The integrated energy grid control system according to claim 9, wherein the energy management application layer further comprises a Web function module, and the Web function module is used for publishing, browsing and downloading information of related data of the microgrid, and supporting publishing information, reports and screen information, and browsing and downloading data, reports, screens and graphics within the scope of authority.

Technical Field

The invention relates to a comprehensive energy power grid control system, and belongs to the technical field of power grid energy management and control.

Background

The park comprehensive energy management system based on the micro-grid is used as a terminal energy unit to supplement a large energy network, and can realize multi-energy coordination and complementation, improve the permeability of renewable energy and meet the response of the demand side of the power grid through energy scheduling and monitoring; the operation safety and reliability of the park power supply system are further improved; various micro sources and loads such as aggregation distributed renewable power generation, energy storage and electric vehicles are aggregated, the power type power electronic device is flexibly regulated and controlled, the characteristic of high autonomy is realized, and the power electronic device and a large power grid form support and interaction; the large power grid fully transfers the distributed power supply and the load to participate in system peak regulation through the park comprehensive energy management system, and the peak-valley difference is effectively reduced; the park comprehensive energy management system can independently operate to ensure the power supply of important loads when a large power grid fails, and the power supply reliability is improved. The intelligent power grid framework which takes a large power grid as a main part and a park micro-power grid (group) as an organism organization becomes an important technical application direction for improving the proportion of clean energy, is an effective form for developing renewable energy in China, fully utilizes the renewable energy to generate electricity to adjust the energy structure, and exerts the huge potential of the renewable energy in China.

The large access of distributed energy and the ever-increasing demand for power quality by users poses new challenges to current power distribution systems. The microgrid is a newly emerging power grid mode in recent years, the topological structure of single power flow of the traditional radiation type power grid is changed essentially, and distributed energy sources and loads connected to the power distribution grid level are divided into a small whole to be uniformly planned, designed, operated, controlled and protected. The microgrid has the advantages of improving the quality of electric energy, the reliability of power supply and the economical efficiency of operation, and can promote the application of a distributed power supply, so that the microgrid has been widely researched in recent years.

The park comprehensive energy management system based on the micro-grid is used as a terminal energy unit to supplement a large energy network, and can realize multi-energy coordination and complementation, improve the permeability of renewable energy and meet the response of the demand side of the power grid through energy scheduling and monitoring; the operation safety and reliability of the park power supply system are further improved; various micro sources and loads such as aggregation distributed renewable power generation, energy storage and electric vehicles are aggregated, the power type power electronic device is flexibly regulated and controlled, the characteristic of high autonomy is realized, and the power electronic device and a large power grid form support and interaction; the large power grid fully transfers the distributed power supply and the load to participate in system peak regulation through the park comprehensive energy management system, and the peak-valley difference is effectively reduced; the park comprehensive energy management system can independently operate to ensure the power supply of important loads when a large power grid fails, and the power supply reliability is improved. The intelligent power grid framework which takes a large power grid as a main part and a park micro-power grid (group) as an organism organization becomes an important technical application direction for improving the proportion of clean energy, is an effective form for developing renewable energy in China, fully utilizes the renewable energy to generate electricity to adjust the energy structure, and exerts the huge potential of the renewable energy in China.

Disclosure of Invention

The invention aims to provide a comprehensive energy power grid control system to realize scheduling decision management and control of a micro-grid and ensure safe operation of the micro-grid.

The present invention provides a comprehensive energy grid control system for solving the above technical problems, wherein the control system adopts a four-layer architecture, and comprises:

a computer system layer comprising a real-time database, a relational database, a computer operating system, and a computer network;

the supporting platform comprises a system resource management module and a graph-model-library integrated module, wherein the system resource management module is used for node monitoring, process monitoring management and file transmission and synchronization, and the model-library integrated module is used for importing and exporting measurement model data, equipment model data and graphs and primitive data, editing the primitives, editing the graph configuration and converting the graphs;

the monitoring application layer comprises a micro-grid operation mode control module, a grid-connected interface device and a grid-connected interface device, wherein the micro-grid operation mode control module is used for switching a micro-grid parallel operation mode and a micro-grid off-grid operation mode, issuing a mode switching command to the distributed power supply and the grid-connected interface device, selecting power failure switching or smooth switching when the parallel operation mode and the off-grid operation mode are switched, automatically switching from the micro-grid-connected operation control mode to the off-grid operation control mode when the power grid fails, and after the power grid failure is recovered, automatically executing micro-selection or receiving a superior command when the micro-grid is switched from the off-grid operation to the grid-connected operation;

energy management application layer, including voltage reactive management module for optimize the setting to the operation of little grid reactive voltage, reactive voltage operation mode can include: the power factor control mode of the grid-connected point, the reactive power control mode of the grid-connected point, the voltage control mode or the off-grid reactive power balance mode, and a parameter set value or range is given according to the selected control mode.

The invention adopts a four-layer framework, can provide various real-time information for the micro-grid scheduling, carries out scheduling decision management and control on the micro-grid, ensures the safe operation of the micro-grid, improves the quality of the micro-grid and improves the economical efficiency of the micro-grid operation, and simultaneously has two normal operation modes of off-grid operation and grid connection, and two transient operation modes of off-grid connection to grid connection and grid connection to off-grid connection, so that the invention not only can stably operate in the two normal operation modes, but also can ensure the reliability of the two transient operation modes.

Further, the method adopted by the monitoring application layer when the grid-connected and off-grid operation modes of the microgrid are switched is as follows:

1) the photovoltaic cell should keep an MPPT mode, when the output of the photovoltaic cell is larger than the load consumption and the storage battery is fully charged, the photovoltaic cell should work in a constant voltage mode, when the output of the photovoltaic cell is smaller than the load consumption or the output of the photovoltaic cell is zero, the storage battery has stored energy and should work in a discharge mode;

2) the storage battery stores energy of 0, when the photovoltaic output is continuously increased but is smaller than the load consumption, the storage battery stops running, the photovoltaic output exceeds the load consumption of the micro-grid, the storage battery is not fully charged, and the storage battery is charged;

3) when the photovoltaic output exceeds the load consumption of the micro-grid, the micro-gas turbine works in a low-output operation mode, when the load demand is continuously increased, the photovoltaic cell and the storage battery cannot meet the load power demand, the output power is increased by the micro-gas turbine, and when the photovoltaic power generation is finished and the energy storage of the energy storage device is zero, the micro-gas turbine completely supplies power.

Further, the computer operating system adopts one of windows, linux and unix, and the relational database is one of oracle, mysql or sqlserver.

Furthermore, the support platform further comprises a permission management module, wherein the permission management module is used for giving different permissions and permission validity periods to the personnel according to different work functions and work properties, the permission management module comprises hierarchical permission management, permission binding and permission configuration, hierarchical management is adopted, user password setting and permission distribution are carried out, password limitation is carried out according to related contents of services, all operators are authorized to carry out identity and permission authentication, and specified system functions and operation ranges are used according to authorization permissions.

Furthermore, the support platform also comprises a database management module, wherein the database management module is used for maintaining, synchronizing, backing up and recovering the database, provides a uniform real-time or quasi-real-time data interface for the outside and can perform access control according to authority and type.

Furthermore, the supporting platform also comprises a system clock time-setting module and a report processing module, wherein the system clock time-setting module is used for setting time according to the signals of the received satellite positioning system and synchronizing clocks of related equipment in the station; the report processing module is used for selecting historical data according to requirements, generating reports with different formats and types, and the reports support file export and printing.

Furthermore, the monitoring application layer comprises an anti-misoperation locking module, the anti-misoperation locking module is based on the conventional anti-misoperation locking of a predefined rule and the anti-misoperation locking function based on topological analysis, an anti-misoperation verification method is adopted to operate an instruction, when an error occurs, an alarm is given and the instruction is executed, and the control object range of the equipment on-off control is a circuit breaker, a negative switch, a disconnecting switch, a grounding disconnecting switch, a main transformer tap and reactive compensation equipment.

Furthermore, the monitoring application layer also comprises an equipment on-off control module which has two control modes of automatic control and manual control, the control operation level is in-situ monitoring, in-station monitoring and remote control from high to low, when the manual control equipment is switched off, the micro-grid monitoring system has an operation monitoring function, a monitor can monitor the micro-grid or another operator station, and the micro-grid monitoring system needs to adopt three steps of selection, correction and execution for the equipment which is switched off.

Furthermore, the energy management application layer comprises a power generation prediction module, the power generation prediction module is used for predicting power generation power according to historical data and measured data, receiving power generation power prediction data of a power prediction system, and configuring a corresponding power prediction function of wind power generation or photovoltaic power generation for a micro-grid system comprising wind power generation and photovoltaic power generation intermittent power generation modes.

Furthermore, the energy management application layer further comprises a Web function module, and the Web function module is used for information release, browse and download of related data of the micro-grid, supports information, report forms and picture information release, and supports browse and download of data, report forms, pictures and graphs in the authority range.

Drawings

FIG. 1 is a schematic diagram of the software architecture of the integrated energy grid control system of the present invention;

fig. 2 is a structural diagram of an integrated energy primary system in the integrated energy grid control system of the present invention;

FIG. 3 is a design diagram of the integrated energy grid control system hardware architecture of the present invention;

fig. 4 is a schematic block diagram of the operation mode of the microgrid in the integrated energy grid control system of the invention.

Detailed Description

The following further describes an embodiment of the present invention with reference to the drawings.

The comprehensive energy power grid control system adopts a four-layer architecture, as shown in fig. 1, and comprises a computer system layer, a support platform, a monitoring application layer and an energy management application layer. The comprehensive energy microgrid control system can provide various real-time information for microgrid scheduling, carries out scheduling decision management and control on a microgrid, ensures safe operation of the microgrid, improves the quality of the microgrid and improves the economical efficiency of microgrid operation, and simultaneously has two normal operation modes of off-grid operation and grid-connected operation and two transient operation modes of off-grid to grid-connected operation and grid-connected to off-grid operation, so that the system can stably operate in the two normal operation modes.

Specifically, the computer system layer comprises a real-time database, a relational database, a computer operating system and a computer network; the supporting platform comprises a database management module, a data acquisition and processing module, a system clock time synchronization module, a system resource management module, a graph-model library integrated module, a permission management module, a human-computer interface and a report processing module; the monitoring application layer comprises an anti-misoperation locking module, an equipment on-off control module, a micro-grid operation mode control module, a sequence control module and a power control module; the energy management application layer comprises a power generation prediction module, a distributed power supply management module, a load management module, a power utilization plan distribution module, a voltage reactive power management module, a statistical analysis and evaluation module and a Web function module.

The computer operating system adopts one of windows, linux or unix, the linux system is recommended in consideration of the system scale and the safety requirement, and the relational database is one of oracle, mysql or sqlserver.

For the monitoring application layer, the microgrid operation mode control module has a switching function of a microgrid grid-connected operation mode and an off-grid operation mode, as shown in fig. 2, the microgrid operation mode control module has the capability of issuing a mode switching command to a distributed power supply, a grid-connected interface device and other equipment, when the microgrid normally switches the grid-connected operation mode, the microgrid monitoring system selects power failure switching or smooth switching, when the power grid fails, the microgrid monitoring system automatically switches from the microgrid grid-connected operation control mode to the off-grid operation control mode, and when the microgrid switches from the off-grid operation to the grid-connected operation after the power grid failure recovers, the microgrid monitoring system selects automatic execution or executes after receiving an upper-level command.

In the embodiment of the invention, the grid-connection and off-grid method adopted by the comprehensive energy microgrid control system specifically comprises the following steps:

s1, the photovoltaic cell should keep an MPPT mode, when the output of the photovoltaic cell is larger than the load consumption and the storage battery is fully charged, the photovoltaic cell should work in a constant voltage mode, when the photovoltaic output is smaller than the load consumption or the photovoltaic output is zero, the storage battery has stored energy and should work in a discharge mode;

s2, when the energy storage of the storage battery is 0, the photovoltaic output is continuously increased but is smaller than the load consumption, the storage battery stops running, the photovoltaic output exceeds the load consumption of the microgrid, the storage battery is not fully charged, and the storage battery is charged;

and S3, when the photovoltaic output exceeds the load consumption of the micro-grid, the micro-gas turbine should work in a low-output operation mode, when the load demand continuously increases, the photovoltaic cell and the storage battery cannot meet the load power consumption demand, the output power is increased by the micro-gas turbine, and when the photovoltaic power generation is finished and the energy storage of the energy storage device is zero, the micro-gas turbine completely supplies power.

In the embodiment of the invention, the anti-misoperation locking module in the monitoring application layer supports the functions of conventional anti-misoperation locking based on a predefined rule and anti-misoperation locking based on topological analysis, all operation instructions are subjected to anti-misoperation verification, when an error occurs, an alarm is given and a locking instruction is executed, the control object range of the on-off control of the equipment is a circuit breaker, a load switch, an isolating switch, a grounding disconnecting link, a main transformer tap and reactive compensation equipment, the on-off control module of the equipment has two control modes of automatic control and manual control, the control operation level is on-site, in-station monitoring and remote control from high to low, when the manual control equipment is on-off, the micro-grid monitoring system has the function of operation monitoring, a monitoring person can monitor the micro-grid monitoring system at the local machine or another operator station, the method comprises the following steps of selecting, correcting and executing the cut-off equipment in the micro-grid monitoring system.

In the embodiment of the present invention, monitoring the control requirements of the power control module in the application layer: the microgrid monitoring system is used for carrying out real-time power control on distributed power supplies, stored energy, loads and the like in the microgrid according to a power optimization control instruction or manual set value of the microgrid energy management system.

The active power control of the micro-grid has the functions of controlling the output of various distributed power generation equipment and controlling the charging and discharging of an energy storage system.

The micro-grid monitoring system has the following active power control modes when the micro-grid is connected to the power grid and operated:

a) and controlling the active power of the constant tie line.

b) And tracking the tie-line plan curve control.

c) And controlling an energy storage charging and discharging plan curve.

When the microgrid runs off the grid, the microgrid monitoring system should monitor the active output value of the main power supply, and when the active output value exceeds a fixed value, other power supply equipment in the microgrid should be adjusted, so that the output of the main power supply is ensured to be within a normal range.

Microgrid reactive power control

The microgrid monitoring system has the functions of microgrid voltage and reactive power management and can set microgrid voltage and reactive power operation modes, wherein the microgrid voltage and reactive power operation modes comprise a power factor control mode, a reactive power control mode, a voltage control mode and the like.

In the embodiment of the invention, a power generation prediction module in an energy management application layer predicts the power generation power through historical data, measured data and the like, receives the power generation power prediction data of a power prediction system, and configures the corresponding power prediction function of wind power generation or photovoltaic power generation for the Hui power grid system comprising intermittent power generation forms such as wind power generation, photovoltaic power generation and the like.

In the embodiment of the present invention, the voltage reactive power management module in the energy management application layer can perform optimal setting on the reactive voltage operation of the microgrid, and the reactive voltage operation mode may include: the system comprises a grid-connected point power factor control mode, a grid-connected point reactive power control mode, a voltage control mode or an off-grid reactive power balance mode, and a parameter set value or range is given for the selected control mode, and meanwhile, the voltage reactive power management has the function of setting the input sequence of reactive compensation equipment.

In the embodiment of the invention, the Web function module in the energy management application layer has the functions of information release, browsing and downloading of related data of the microgrid, supports information, report and picture information release, and supports browsing and downloading of data, reports, pictures and graphs in the permission range.

In the embodiment of the invention, the sequence control module in the energy management application layer can control the equipment action in the microgrid according to the preset sequence and flow, and the basic functions to be realized comprise grid-connected starting, grid-connected stopping, black starting, off-grid stopping and the like.

Grid connection starting: switching on a grid-connected point switch, switching in each power supply and load, and controlling the micro-grid to stably transit from a shutdown state to a grid-connected operation state; grid connection and shutdown: quitting each power supply and load, disconnecting the grid-connected point switch, and controlling the micro-grid to stably transit from a grid-connected operation state to a shutdown state; black start: putting a power supply and a load into the micro-grid, and controlling the micro-grid to be in a stable transition from a shutdown state to an off-grid running state; and (4) off-grid shutdown, namely, quitting the power supply and the load, and controlling the microgrid to enable the off-grid operation state to be stably transited to a shutdown state.

The support platform comprises a database management module, a data acquisition and processing module, a system clock time synchronization module, a system resource management module, a graph-model library integrated module, a permission management module, a human-computer interface and a report processing module.

The system resource management module is used for node monitoring, process monitoring management and file transmission and synchronization; the integrated module of the graph model library is used for importing and exporting measurement model data, equipment model data and graph and primitive data, the integration of the graph model library is used for primitive editing, graph configuration editing and graph conversion, and the integrated module supports the conversion function between system private graphs and SVG graphs and supports the conversion function between the system private graphs and G language graphs; the authority management module is used for giving different authorities and authority validity periods to personnel according to different work functions and work properties, including hierarchical authority management, authority binding and authority configuration, and adopting hierarchical management to set user passwords and distribute the authorities, carrying out password limitation according to related contents of services, authorizing all operators, carrying out identity and authority authentication, and using specified system functions and operation ranges according to authorized authorities.

In the embodiment of the invention, the requirements that the data acquisition and processing module in the supporting platform can acquire in real time are as follows:

the grid-connected point data requirements include:

a) position information of the circuit breaker, the disconnecting switch and the grounding disconnecting link.

b) Position information of the main transformer tap.

c) And the working state of the grid connection point.

d) And the grid-connected point has active electric quantity and reactive electric quantity.

e) Grid-connected point three-phase voltage, three-phase current, active power, reactive power, power factor, electric energy quality and power grid frequency.

The distributed power generation measurement data requirements include:

a) photovoltaic measurement data:

1) photovoltaic module data of measurationing: direct current side current, direct current side voltage, direct current side power' photovoltaic module temperature;

2) photovoltaic inverter measurement data: three-phase voltage, three-phase current, active power, reactive power, power factor, frequency.

b) Wind power generation measurement data:

wind power generation output voltage, output current, active power, power factor and output frequency.

c) Diesel generator measured data:

the system comprises a generator output voltage, a generator output current, active power, reactive power, a power factor, frequency, total generated energy, rotating speed, diesel oil consumption and diesel engine temperature.

d) Micro gas turbine (gas internal combustion engine) measurement data:

the output voltage of the gas turbine, the output current of the gas turbine, active power, reactive power, power factor, frequency, thermal power, daily heat supply, total heat supply, daily generated energy, total generated energy, rotating speed and gas consumption of the gas turbine.

The energy storage measurement data requirements include:

a) battery measurement data: direct current, direct voltage, direct power, total remaining capacity, battery temperature.

b) Energy storage inverter measurement data: three-phase voltage, three-phase current active power, reactive power, power factor and frequency.

c) Active electric quantity and reactive electric quantity.

The load measurement data requirements include:

three-phase voltage, three-phase current, active power, reactive power, power factor, active electric quantity and reactive electric quantity.

The reactive compensation equipment measurement data requirements comprise:

three-phase voltage, three-phase current and reactive power.

Weather and other data requirements include:

ambient temperature, humidity, atmospheric pressure, total irradiance, wind speed, and wind direction.

The system should have functions of calculating and analyzing the collected data information, and the data analysis function includes but is not limited to:

data source selection, automatic cycle calculation and the like, and statistics is carried out according to the time period of day, month, season, year or user-defined time period;

counting the maximum value, the minimum value, the average value and the accumulated value of the specified quantity, wherein the counting time period comprises year, month, day, hour and the like;

logic calculation of multi-position signals and state signals;

counting the operation times of displacement, control, remote regulation and the like;

counting the remote control accuracy and the remote regulation response accuracy;

and (4) performing statistical analysis on the voltage and current out-of-limit, the power factor and the electric energy quality qualified rate.

The functions of rationality check and out-of-limit alarm for the collected data information are provided, including but not limited to:

and (3) data integrity checking: bad data are automatically filtered, and a data quality label is automatically set;

setting a limit value: different limit values are supported to be used in different time periods;

and (4) alarming: alarm definition, alarm action, alarm distribution, picture calling, alarm information storage and the like.

The function of storing the collected data information should be provided, including but not limited to:

storing and managing original data and application data in a classified manner;

storing the event sequence record and the operation record.

In an embodiment of the present invention, the human-machine interface in the support platform includes:

the real-time monitoring picture can support a system main wiring diagram, a network diagram, a geographical distribution diagram, an operation condition diagram, a communication network diagram and the like, and the diagram display mode comprises a trend diagram, a histogram, a pie chart and the like.

The method supports multi-screen display, graphic multi-window, stepless zooming, roaming, dragging, hierarchical display and the like.

The graphic modeling tool provided with the graphic model library integrated module is provided with a network topology management tool, supports a user to define equipment primitives and interval templates and supports copying of various primitive tape model attributes.

State management should support management and monitoring of software modules, network operating states and operations.

The alarm system has alarm functions in the forms of graphics, voice, characters, printing and the like, and supports the functions of alarm inquiry, custom alarm level, alarm statistical analysis, alarm confirmation and clearing, main event sequence display and the like.

The operation and control can realize manual counting, signboard operation, locking and unlocking operation and remote control and regulation functions, and corresponding authority control is required; the system has the functions of inquiring and accessing the acquired data and has the function of inquiring in a combined condition mode.

The microgrid monitoring system should be able to give its parameter settings or ranges, including voltage limits, reactive limits, power factor limits, dead zones, time limits, slopes, etc., for a selected reactive voltage delivery mode.

In the embodiment of the invention, the distributed power management module in the energy management application layer has the function of performing corresponding fuel management on power generation devices such as a gas turbine, a diesel engine and the like in a microgrid, and the functions comprise fuel consumption statistics, residual fuel calculation and display, fuel stock early warning and the like. The method has the function of managing the overhaul state of the power generation equipment in the microgrid, and comprises the functions of power generation equipment overhaul hanging plate, overhaul time setting and the like. The state management system has the function of state management of the charge state of the energy storage system in the micro-grid, and early warning can be realized when the charge state of the energy storage system is too high or too low. The method has the function of setting the main power supply in the micro-grid, and for the micro-grid with a plurality of main power supplies capable of operating as the main power supply, corresponding standby sequences can be set for the standby main power supplies.

In the embodiment of the invention, the load management module in the energy management application layer carries out classified management on the load according to the requirements of users on the reliability of power supply and the factors of personal safety, micro-grid operation safety, economic loss or influence degree caused by power supply interruption and the like. Load switching strategies and plans under different working conditions of the microgrid can be preset according to load classification; a load prediction function is configured; the load electricity utilization can be managed according to the load real-time monitoring data and the load electricity utilization plan; under the off-grid state of the microgrid, power limiting strategies, including control rounds, control time periods, power fixed values, electric quantity fixed values and the like, can be respectively implemented on each load terminal, and are issued to a monitoring system for execution.

In the embodiment of the invention, a power utilization plan distribution module in the energy management application layer arranges a power generation plan, an energy storage charging and discharging plan and a load power utilization plan of each distributed power supply through optimized calculation according to a remote scheduling plan, power generation load prediction data, micro-grid real-time operation data, power supply and load characteristics and operation constraint conditions. Preferably, the system comprises a day-ahead power generation and utilization plan and a day-in power generation and utilization plan. The power generation and utilization plan can preferably arrange the output power of 24 hours from the next zero hour, the time resolution is not more than 1 hour, the output power of 4 hours in the future is preferably planned in a rolling mode, and the time resolution is not more than 15 minutes. The power generation plan can be arranged in two ways of manual input and automatic generation.

In the embodiment of the invention, the statistical analysis and evaluation module in the energy management application layer comprises resource analysis, energy exchange analysis, energy consumption and benefit analysis, reliability analysis, electric energy quality analysis and the like.

For a micro-grid which takes wind power generation or photovoltaic power generation as main energy, resource analysis can be carried out according to the monitoring data of wind energy resources and solar energy resources. And carrying out statistical analysis on the power generation, power utilization and energy storage system inside the microgrid and the electric energy exchange between the microgrid and an external system. The micro-grid system running energy consumption and benefit are analyzed, and the micro-grid system running energy consumption and benefit analysis system has the functions of energy consumption analysis, energy saving analysis, cost accounting, benefit analysis and the like. The micro-grid power supply reliability analysis function is provided, and analysis on power supply reliability, annual power failure time, annual power failure times and the like is included. And performing wind and light resource utilization analysis according to the resource monitoring data and the actual power generation and utilization data. And analyzing the power quality of the grid-connected point of the grid-connected micro-grid.

As shown in fig. 3, the integrated energy system in the figure highly integrates the subsystems of changing, distributing, using, lighting, storing, charging and discharging, realizes local consumption of distributed clean energy power generation, economic power utilization, stabilization of the peak-valley difference of the power grid interface, improvement of the power grid side energy efficiency and the effect of friendly interactive response with the demand side of the power grid system scheduling on the user side, and meanwhile, the power electronic device has flexible regulation capability and also has the function of regulating the electric energy quality such as reactive power regulation, harmonic suppression regulation and the like.

Computer controlled secondary system configuration

As shown in fig. 4, the system is configured with devices such as front-end servers, data servers, application servers, workstations, switches/routers, etc. The number of the servers and the workstations can be increased or decreased reasonably according to the size of the micro-grid and the size of the calculated amount, and a master-slave hot standby mode of a computer and network equipment can be adopted for improving the reliability of the system.

The system should be provided with safety protection equipment such as a firewall, an isolation device and the like, and the network safety protection should meet the requirements specified by GB/T20270 and the like.

The data acquisition communication network is connected with a distributed power supply controller, a load controller, a measurement and control protection device, a central controller, a grid-connected interface and other devices.

The communication in the system is preferably Ethernet communication, optical fiber communication, 485, etc., and the communication protocol is preferably DL/T634.5101, DL/T634.5104 and DL/T860 communication protocols. The communication with the power grid dispatching mechanism is preferably realized by adopting an Ethernet communication mode and an optical fiber communication mode, and the communication and the protocol are preferably realized by adopting DL/T634.5101, DL/T634.5104 and DL/T860 communication protocols.

The invention can provide various real-time information for the micro-grid scheduling, carries out scheduling decision management and control on the micro-grid, ensures the safe operation of the micro-grid, improves the quality of the micro-grid and improves the economical efficiency of the operation of the micro-grid, and simultaneously has two normal operation modes of off-grid operation and grid connection and two transient operation modes of off-grid to grid connection and grid connection to off-grid connection, thereby not only stably operating in the two normal operation modes, but also ensuring the reliability of the two transient operation modes.

The micro-grid core secondary equipment research integrating protection, safety and stability control and cloud interaction is oriented to a distributed new energy resource monitoring technology, a container technology, a distributed application release technology, a micro-grid distributed protection technology, a micro-grid stability control technology and the like, stable and reliable operation of the micro-grid is achieved, power supply of key equipment and efficient access of distributed energy are guaranteed, and a novel intelligent micro-grid controller is formed. This little electric wire netting control system of comprehensive energy, through the monitoring of energy consumption panorama in the garden, the construction energy management and control platform realizes that source, net, lotus, storage, car energy flow panorama are kept watch on, can demonstrate the respective real-time power generation situation of all kinds of new forms of energy directly perceived, the energy medium pipe network condition of flow, the energy loss condition, the real-time high-efficient integration that realizes information resource such as energy equipment operational aspect of energy consumption condition.

And those not described in detail in this specification are well within the skill of those in the art.

It is to be noted that, in the present invention, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.