阅读说明：本技术 一种应用于光伏储热系统的负载加热时间控制方法 (Load heating time control method applied to photovoltaic heat storage system ) 是由 郑炳鑫 王亚非 张晓宁 于 2020-12-21 设计创作，主要内容包括：本发明的一个实施例公开了一种应用于光伏储热系统的负载加热时间控制方法,所述方法包括以下步骤：S101：采集光伏储热系统中光伏逆变器设备的运行状态,获得光伏实时发电量；S103：根据所述光伏实时发电量按优先等级接入需加热的负载；S105：记录接入的各路负载的加热起始运行时间；S107：记录接入的各路负载的加热停止运行时间；S109：根据各路负载的加热起始运行时间和加热停止运行时间计算各路负载的已加热时间,将所述各路负载的已加热时间与所述各路负载的能加热时间对比,若负载已加热时间小于负载能加热时间,则在光伏停止发电后,利用市电对该负载进行补充加热。(One embodiment of the invention discloses a load heating time control method applied to a photovoltaic heat storage system, which comprises the following steps: s101: collecting the running state of photovoltaic inverter equipment in a photovoltaic heat storage system to obtain photovoltaic real-time generated energy; s103: accessing a load needing to be heated according to the photovoltaic real-time power generation quantity and the priority level; s105: recording the heating initial running time of each accessed load; s107: recording the heating stop operation time of each accessed load; s109: and calculating the heated time of each load according to the heating starting running time and the heating stopping running time of each load, comparing the heated time of each load with the energy heating time of each load, and if the heated time of the load is less than the energy heating time of the load, performing supplementary heating on the load by using commercial power after the photovoltaic stops generating.)

1. A load heating time control method applied to a photovoltaic heat storage system is characterized by comprising the following steps:

s101: collecting the running state of photovoltaic inverter equipment in a photovoltaic heat storage system to obtain photovoltaic real-time generated energy;

s103: accessing a load needing to be heated according to the photovoltaic real-time power generation quantity and the priority level;

s105: recording the heating initial running time of each accessed load;

s107: recording the heating stop operation time of each accessed load;

s109: and calculating the heated time of each load according to the heating starting running time and the heating stopping running time of each load, comparing the heated time of each load with the energy heating time of each load, and if the heated time of the load is less than the energy heating time of the load, performing supplementary heating on the load by using commercial power after the photovoltaic stops generating.

2. The method of claim 1, further comprising:

s111: the heatable time of the load to be heated is reset at a predetermined time.

3. The method of claim 1, wherein after S105, the method further comprises:

s106: and in the process of heating each load, calculating the heating time of each load energy through a load control method according to the requirements of different running times required by loads with different purposes and priorities.

4. The method of claim 3, wherein calculating the individual load heatable time by the load control method comprises:

s1061: judging whether the accessed load needing to be heated is conducted or not;

s1062: calculating the heat of the load at the current moment according to the conduction condition of the load, the heat of the load in the previous minute and the heating ratio, wherein the initial quantity of the heat of the load in the previous minute of each path is 0;

s1063: if the heat of the load at the current moment is more than or equal to 0, assigning the value of the heat of the load at the current moment to the heat of the load in the previous minute, or setting the values of the heat of the load in the previous minute and the heat of the load at the current moment to 0;

s1064: judging whether the current moment is greater than or equal to 0 and less than or equal to the preset heat accumulation zero clearing moment;

s1065: calculating the remaining time of day according to the judgment result of the step S1064, the current time and the heat accumulation zero clearing time;

s1066: calculating the subsequent conduction time of the load according to the remaining time of the day, the heating ratio and the heat of the load at the current moment; when the current moment is the heating initial running time of the load, the subsequent conduction time obtained by calculation is the heatable time of the load;

s1067: judging whether the subsequent conduction time is greater than or equal to 0, if so, allowing the load to be conducted, and heating the load in the photovoltaic power generation capacity according to the priority sequence; otherwise, stopping the load and stopping heating the load;

and the current time, the heat accumulation zero clearing time and the remaining time of the day in the steps are all made into 24 hours.

5. The method according to claim 4, wherein when the load is turned on in step S1061, the calculation formula of step S1062 is:

QN＝QN₀+1/60；

when the load is cut off in step S1061, the calculation formula of step S1062 is:

QN＝QN₀-1/60(a-1)；

wherein the content of the first and second substances,

QN is the heat of the load at the current moment, QN₀The heat of the load in the previous minute, a is the heating ratio, and N is 1 to the total amount of load access.

6. The method according to claim 4, wherein if the result of the determination in step S1064 is that the current time is greater than or equal to 0 and less than or equal to the preset heat accumulation zero clearing time, the calculation formula of the remaining time of day in step S1065 is as follows:

T＝t₀-t；

otherwise, the calculation formula of the remaining time of day in step S1065 is:

T＝24-(t-t₀)；

wherein T is the remaining time of day, T₀The preset heat accumulation zero clearing time is, and t is the current time.

7. The method according to claim 4, wherein the calculation formula of the subsequent on-time in step S1066 is as follows:

TN_on＝[T-(a-1)QN]/a；

wherein TN_onIs the subsequent on time.

8. The method of claim 4, wherein the load control method is run once a minute.

Technical Field

The invention relates to the technical field of photovoltaic power generation and heat storage, in particular to a load heating time control method applied to a photovoltaic heat storage system.

Background

With the development of clean energy power generation technology, photovoltaic power generation is mature and applied to supplementary power supply systems of various industries, and in areas partially using electric heating in heating seasons, heating by adopting a photovoltaic heat storage mode is more beneficial to energy conservation and emission reduction, but photovoltaic power generation has instability, the maximum heating time requirement of heat storage load during use and different heat supply requirements of application scenes.

Therefore, a load heating time control method applied to a photovoltaic heat storage system is needed to improve the utilization rate of photovoltaic power generation, stably control the heating time of the heat storage load and meet the heat supply requirement.

Disclosure of Invention

The invention aims to provide a load heating time control method applied to a photovoltaic heat storage system, and solves the problems that the load heating time is not accurately controlled, the economic benefit is low and load equipment is easily damaged in the existing control method of photovoltaic heat storage.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a load heating time control method applied to a photovoltaic heat storage system, which comprises the following steps:

s101: collecting the running state of photovoltaic inverter equipment in a photovoltaic heat storage system to obtain photovoltaic real-time generated energy;

s103: accessing a load needing to be heated according to the photovoltaic real-time power generation quantity and the priority level;

s105: recording the heating initial running time of each accessed load;

s107: recording the heating stop operation time of each accessed load;

s109: and calculating the heated time of each load according to the heating starting running time and the heating stopping running time of each load, comparing the heated time of each load with the energy heating time of each load, and if the heated time of the load is less than the energy heating time of the load, performing supplementary heating on the load by using commercial power after the photovoltaic stops generating.

In a specific embodiment, the method further comprises:

s111: the heatable time of the load to be heated is reset at a predetermined time.

In a specific embodiment, after S105, the method further includes:

s106: and in the process of heating each load, calculating the heating time of each load energy through a load control method according to the requirements of different running times required by loads with different purposes and priorities.

In one embodiment, the calculating the heating time of each load by the load control method includes:

s1061: judging whether the accessed load needing to be heated is conducted or not;

s1062: calculating the heat of the load at the current moment according to the conduction condition of the load, the heat of the load in the previous minute and the heating ratio, wherein the initial quantity of the heat of the load in the previous minute of each path is 0;

s1063: if the heat of the load at the current moment is more than or equal to 0, assigning the value of the heat of the load at the current moment to the heat of the load in the previous minute, or setting the values of the heat of the load in the previous minute and the heat of the load at the current moment to 0;

s1064: judging whether the current moment is greater than or equal to 0 and less than or equal to the preset heat accumulation zero clearing moment;

s1065: calculating the remaining time of day according to the judgment result of the step S1064, the current time and the heat accumulation zero clearing time;

s1066: calculating the subsequent conduction time of the load according to the remaining time of the day, the heating ratio and the heat of the load at the current moment; when the current moment is the heating initial running time of the load, the subsequent conduction time obtained by calculation is the heatable time of the load;

s1067: judging whether the subsequent conduction time is greater than or equal to 0, if so, allowing the load to be conducted, and heating the load in the photovoltaic power generation capacity according to the priority sequence; otherwise, stopping the load and stopping heating the load;

and the current time, the heat accumulation zero clearing time and the remaining time of the day in the steps are all made into 24 hours.

In a specific embodiment, when the load is turned on in step S1061, the calculation formula of step S1062 is:

QN＝QN₀+1/60；

when the load is cut off in step S1061, the calculation formula of step S1062 is:

QN＝QN₀-1/60(a-1)；

wherein the content of the first and second substances,

QN is the heat of the load at the current moment, QN₀The heat of the load in the previous minute, a is the heating ratio, and N is 1 to the total amount of load access.

In a specific embodiment, if the result determined in step S1064 is that the current time is greater than or equal to 0 and less than or equal to the preset heat accumulation zero clearing time, the calculation formula of the remaining time of day in step S1065 is as follows:

T＝t₀-t；

otherwise, the calculation formula of the remaining time of day in step S1065 is:

T＝24-(t-t₀)；

wherein T is the remaining time of day, T₀The preset heat accumulation zero clearing time is, and t is the current time.

In a specific embodiment, the calculation formula of the subsequent on-time in step S1066 is as follows:

TN_on＝[T-(a-1)QN]/a；

wherein TN_onIs the subsequent on time.

In one embodiment, the load control method is run once a minute.

The invention has the following beneficial effects:

the load heating time control method applied to the photovoltaic heat storage system solves the problem of damage caused by overtime heating of the load in the load heating process of the photovoltaic heat storage system, can accurately control the load heating time, enables loads with different purposes to be heated according to priority, achieves full utilization of photovoltaic power generation, achieves good heat supply effect, is high in economic benefit, and meanwhile guarantees safe and reliable operation of the system.

Drawings

In order to more clearly illustrate the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are one embodiment of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 shows a flowchart of a load heating time control method applied to a photovoltaic heat storage system according to an embodiment of the invention.

Fig. 2 shows a flowchart of a load heating time control method further included in the load heating time control method applied to the photovoltaic heat storage system according to an embodiment of the present invention.

Detailed Description

In order to make the technical solution of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. The present invention will be described in detail with reference to specific examples, but the present invention is not limited to these examples. Variations and modifications may be made by those skilled in the art without departing from the principles of the invention and should be considered within the scope of the invention.

The embodiment provides a load heating time control method applied to a photovoltaic heat storage system, as shown in fig. 1, the method includes the following steps:

s101: collecting the running state of photovoltaic inverter equipment in a photovoltaic heat storage system to obtain photovoltaic real-time generated energy;

s103: accessing a load needing to be heated according to the photovoltaic real-time power generation quantity and the priority level;

wherein, the priority level is that the important load is heated preferentially according to the importance degree of the load; for example, if some loads need to be heated in the morning and are not used in the evening, and the total heating time is short, the priority level is high, and heating can be preferentially carried out; or sometimes, the photovoltaic power generation amount is small, all loads cannot be heated, and the important loads are preferentially supplied with power for heating.

S105: recording the heating initial running time of each accessed load;

s106: in the process of heating each load, according to the requirements of different running times required by loads with different purposes and priorities, calculating the heating time of each load energy through a load control method; further carrying out load heating control;

wherein, the load control method described in step S106 is operated once in one minute;

step S106 specifically includes the following steps:

as shown in fig. 2, wherein, RN in fig. 2_onRepresenting the load conduction condition, RN_on1 represents load conduction; RAN (radio access network)_onRepresenting the condition of permissible load conduction, RAN_onRAN for allowing load conduction 1_on0 is not allowed to turn on the load, namely the load is cut off; for example: r1_on1 represents the first path of load connection.

S1061: judging whether the accessed load needing to be heated is conducted or not;

s1062: calculating the heat of the load at the current moment according to the conduction condition of the load, the heat of the load in the previous minute and the heating ratio, wherein the initial quantity of the heat of the load in the previous minute of each path is 0;

when the load is turned on, the calculation formula of step S1062 is:

QN＝QN₀+1/60；

when the load is cut off, the calculation formula of step S1062 is:

QN＝QN₀-1/60(a-1)；

wherein the content of the first and second substances,

QN is the heat of the load at the current moment, QN₀The load is the heat of the previous minute, a is the heating ratio, the heating ratio is determined according to the performance of the heat storage material, and the heating ratios used when heating and controlling the loads of each path of the same system are the same; n is taken to be 1 to the total number of load accesses, e.g.Taking an access 6-path load as an example, N is 1-6, Q1 is the current time heat of the access first-path load, Q2 is the current time heat of the access second-path load, and N in other formulas is the same.

S1063: if the heat of the load at the current moment is more than or equal to 0, assigning the value of the heat of the load at the current moment to the heat of the load in the previous minute, or setting the values of the heat of the load in the previous minute and the heat of the load at the current moment to 0;

for example: if Q2 has a value of 150, then Q2₀＝Q2＝150。

S1064: judging whether the current moment is greater than or equal to 0 and less than or equal to the preset heat accumulation zero clearing moment;

the current time and the heat quantity accumulation zero clearing time are both 24 hours, the heat quantity accumulation zero clearing time clears the heat quantity of each load at the current time and the heat quantity of the previous minute, and the time can be set according to actual requirements, for example, the time can be set to be 23 hours, 22 hours, 30 minutes, 23 seconds and the like.

S1065: calculating the remaining time of day according to the judgment result of the step S1064, the current time and the heat accumulation zero clearing time;

if the result determined in step S1064 is that the current time is greater than or equal to 0 and less than or equal to the preset heat accumulation zero clearing time, the calculation formula of the remaining time of day in step S1065 is as follows:

T＝t₀-t；

otherwise, the calculation formula of the remaining time of day in step S1065 is:

T＝24-(t-t₀)；

wherein T is the remaining time of a day, and is prepared by adopting a 24-hour system₀The preset heat accumulation zero clearing time is, and t is the current time. The minutes in the remaining time of day are calculated in hours, i.e. minutes are converted to hours, e.g. 15 minutes is 0.25 hour.

S1066: calculating the subsequent conduction time of the load according to the remaining time of the day, the heating ratio and the heat of the load at the current moment; when the current moment is the heating initial running time of the load, the subsequent conduction time obtained by calculation is the heatable time of the load;

wherein, the calculation formula of the subsequent conduction time is as follows:

TN_on＝[T-(a-1)QN]/a；

wherein TN_onIs the subsequent on time.

S1067: judging whether the subsequent conduction time is greater than or equal to 0, if so, allowing the load to be conducted, and heating the load in the photovoltaic power generation capacity according to the priority sequence; and if not, stopping the load and stopping heating the load.

S107: recording the heating stop operation time of each accessed load;

for example, the load heating start operation time is 13:00:50 at 1/10/2020 and the heating stop operation time is 15:00:50 at 1/10/2020.

S109: and calculating the heated time of each load according to the heating starting running time and the heating stopping running time of each load, comparing the heated time of each load with the energy heating time of each load, and if the heated time of the load is less than the energy heating time of the load, performing supplementary heating on the load by using commercial power after the photovoltaic stops generating.

S111: the heatable time of the load to be heated is reset at a predetermined time.

Preferably, the warmable time of the load to be heated is reset at zero time per day.

The load heating time control method applied to the photovoltaic heat storage system, provided by the embodiment, solves the problem of damage caused by overtime heating of the load in the load heating process of the photovoltaic heat storage system, can accurately control the load heating time, enables loads with different purposes to be heated according to priority, realizes full utilization of photovoltaic power generation, achieves a good heat supply effect, is high in economic benefit, and meanwhile guarantees safe and reliable operation of the system.

The skilled person can understand that, without violating logic, the steps of the load heating time control method applied to the photovoltaic heat storage system of the present application do not necessarily have to be executed according to the above steps, and previous steps may be executed after subsequent steps, for example, the step S105 occurs after the step S106, and after the load control method starts to be executed, the heating start operation time of each load switched in at different times is recorded in real time.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.