CN109450001B - Multi-distribution-platform-area photovoltaic output distribution method and device - Google Patents

Multi-distribution-platform-area photovoltaic output distribution method and device Download PDF

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CN109450001B
CN109450001B CN201811322482.7A CN201811322482A CN109450001B CN 109450001 B CN109450001 B CN 109450001B CN 201811322482 A CN201811322482 A CN 201811322482A CN 109450001 B CN109450001 B CN 109450001B
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photovoltaic output
distribution
type
area
power
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CN109450001A (en
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陈嵘
邓祖强
郭云鹏
周静
殷伟斌
边海峰
冯悦鸣
王炜
张盛
曾建梁
丁一岷
陈超
王法
曾东
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Beijing Nanrui Dianyan Huayuan Electric Power Technology Co ltd
Jiaxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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Beijing Nanrui Dianyan Huayuan Electric Power Technology Co ltd
Jiaxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/383—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/003—Load forecast, e.g. methods or systems for forecasting future load demand
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention provides a multi-distribution-platform-area photovoltaic output distribution method and a device, which relate to the technical field of photovoltaic consumption, and the method comprises the following steps: dividing the power distribution station area into a first type power distribution station area and a second type power distribution station area; respectively acquiring power distribution data of a first type power distribution area and a second type power distribution area every other preset period; respectively screening out areas with excessive photovoltaic output in the two types of power distribution areas; distributing redundant photovoltaic output of a photovoltaic output surplus distribution area in the first type of distribution area to an area with non-surplus photovoltaic output for consumption, and distributing redundant photovoltaic output of a second type of distribution area to an area with non-surplus photovoltaic output for consumption; and distributing redundant photovoltaic output in the first type of power distribution area to the remaining areas with the photovoltaic output not being excessive in the second type of power distribution area for consumption. The photovoltaic power generation system can eliminate the surplus photovoltaic output, greatly reduce the light rejection rate, reduce the impact influence of photovoltaic power generation on a large power grid, and improve the reliability of photovoltaic power supply.

Description

Multi-distribution-platform-area photovoltaic output distribution method and device
Technical Field
The invention relates to the technical field of photovoltaic consumption, in particular to a photovoltaic output distribution method and device for a multi-distribution-platform area.
Background
Impact caused by large-scale photovoltaic power generation when the large power grid is incorporated can bring adverse effect to the large power grid, difficulty is brought to photovoltaic absorption, if power generation output is not matched with load characteristics, real-time balance of electric power cannot be realized, and light abandoning phenomenon is caused, so that reliability of power supply of an electric power system is influenced. The light abandoning phenomenon not only causes the waste of clean energy, but also greatly reduces the economic benefit of power generation enterprises, and influences the healthy development of new energy in China.
With the improvement of the photovoltaic permeability, how to ensure the reliability of power supply of the power system has become one of the hot points of research, but at present, an effective means for reducing the light abandoning phenomenon through photovoltaic absorption is lacked, so that the power supply of the power system is unstable.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for distributing photovoltaic output of multiple power distribution areas, which can eliminate excess photovoltaic output and greatly reduce light rejection rate, thereby reducing impact influence of photovoltaic power generation on a large power grid and improving reliability of photovoltaic power supply.
In a first aspect, an embodiment of the present invention provides a multi-distribution-platform-area photovoltaic output distribution method, including the following steps:
dividing the power distribution station area into a first type power distribution station area and a second type power distribution station area, wherein the first type power distribution station area comprises photovoltaic power generation equipment and a conventional load, and the second type power distribution station area comprises photovoltaic power generation equipment, a conventional load and a flexible load;
respectively acquiring first power distribution data of the first type of power distribution station area and second power distribution data of the second type of power distribution station area every other preset period; the first power distribution data comprise photovoltaic output and conventional load consumption power of each power distribution area in the first type of power distribution areas, and the second power distribution data comprise photovoltaic output, conventional load consumption power and flexible load consumption power of each power distribution area in the second type of power distribution areas;
respectively screening out a station area with excessive photovoltaic output in the first type of power distribution station area and a station area with excessive photovoltaic output in the second type of power distribution station area according to the first power distribution data and the second power distribution data;
distributing redundant photovoltaic output of the photovoltaic output surplus distribution area in the first type distribution area to an area with non-surplus photovoltaic output for consumption, and distributing redundant photovoltaic output of the photovoltaic output surplus distribution area in the second type distribution area to an area with non-surplus photovoltaic output for consumption;
and distributing redundant photovoltaic output in the first type of power distribution area to the remaining areas with the photovoltaic output not being excessive in the second type of power distribution area for consumption.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the step of screening out a distribution area with excessive photovoltaic output in the first type distribution area and a distribution area with excessive photovoltaic output in the second type distribution area according to the first distribution data and the second distribution data includes:
judging whether the photovoltaic output of each power distribution area in the first type of power distribution areas is larger than the load consumption power or not according to the first power distribution data, and taking the power distribution areas with the photovoltaic output larger than the load consumption power as areas with excessive photovoltaic output;
and judging whether the photovoltaic output of each power distribution area in the second power distribution areas is greater than the sum of the power of the load absorption and the power of the flexible load or not according to the second power distribution data, and taking the power distribution areas with the photovoltaic output greater than the sum of the conventional load consumption power and the flexible load consumption power as the areas with excessive photovoltaic output.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the method further includes:
respectively sequencing each power distribution station area in the first type of power distribution station area and each power distribution station area in the second type of power distribution station area according to a preset sequence;
and arranging the areas with excessive photovoltaic output in the first type of power distribution areas in sequence before the areas with insufficient photovoltaic output in the first type of power distribution areas, and arranging the areas with excessive photovoltaic output in the second type of power distribution areas in sequence before the areas with insufficient photovoltaic output in the second type of power distribution areas.
In combination with the second possible implementation manner of the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein,
distributing redundant photovoltaic output of the photovoltaic output surplus distribution area in the first type distribution area to the photovoltaic output surplus distribution area for consumption, and distributing redundant photovoltaic output of the photovoltaic output surplus distribution area in the second type distribution area to the photovoltaic output surplus distribution area for consumption, wherein the photovoltaic output surplus distribution area comprises the following steps:
distributing redundant photovoltaic output of the photovoltaic output surplus distribution area in the first type of distribution area to the photovoltaic output surplus distribution area for consumption according to the preset sequence through a power exchanger;
and distributing the redundant photovoltaic output of the photovoltaic output surplus distribution areas in the second type of distribution areas to the areas with the non-redundant photovoltaic output according to the preset sequence through a power exchanger for consumption.
With reference to the third possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the step of allocating the redundant photovoltaic output of the first type distribution area to the remaining areas of the second type distribution area where the photovoltaic output is not excessive for consumption includes:
and distributing redundant photovoltaic output of the first type of power distribution area to the remaining areas with the photovoltaic output not being excessive in the second type of power distribution area for consumption through a power exchanger.
With reference to the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the method further includes:
respectively collecting first photovoltaic output historical data of the first type of distribution area and second photovoltaic output historical data of the second type of distribution area;
and distributing the photovoltaic output of each distribution area of the first type of distribution areas according to the first photovoltaic output historical data, and distributing the photovoltaic output of each distribution area of the second type of distribution areas according to the second photovoltaic output historical data.
With reference to the fifth possible implementation manner of the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where the method further includes:
predicting the total photovoltaic output prediction amount of the first type of distribution area and the second type of distribution area according to the first photovoltaic output historical data and the second photovoltaic output historical data;
and setting the quantity of the flexible loads according to the predicted total photovoltaic output, so that the power consumption demand of the flexible loads is greater than the predicted total photovoltaic output.
In a second aspect, an embodiment of the present invention provides a multi-distribution-platform-area photovoltaic output distribution device, including a classification module, a data acquisition module, a screening module, a first distribution module, and a second distribution module;
the classification module is used for classifying the power distribution station into a first type power distribution station area and a second type power distribution station area, wherein the first type power distribution station area comprises photovoltaic power generation equipment and a conventional load, and the second type power distribution station area comprises photovoltaic power generation equipment, a conventional load and a flexible load;
the data acquisition module is used for respectively acquiring first power distribution data of the first type of power distribution station area and second power distribution data of the second type of power distribution station area at intervals of a preset period; the first power distribution data comprise photovoltaic output and conventional load consumption power of each power distribution area in the first type of power distribution areas, and the second power distribution data comprise photovoltaic output, conventional load consumption power and flexible load consumption power of each power distribution area in the second type of power distribution areas;
the screening module is used for screening out a region with excessive photovoltaic output in the first type of power distribution region and a region with excessive photovoltaic output in the second type of power distribution region respectively according to the first power distribution data and the second power distribution data;
the first distribution module is used for distributing redundant photovoltaic output of the photovoltaic output surplus distribution area in the first type distribution area to an area with non-surplus photovoltaic output for consumption, and distributing redundant photovoltaic output of the photovoltaic output surplus distribution area in the second type distribution area to an area with non-surplus photovoltaic output for consumption;
the second distribution module is used for distributing redundant photovoltaic output in the first type of distribution area to the remaining areas without the photovoltaic output in the second type of distribution area for consumption.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the screening module is further configured to:
judging whether the photovoltaic output of each power distribution area in the first type of power distribution areas is larger than the load consumption power or not according to the first power distribution data, and taking the power distribution areas with the photovoltaic output larger than the load consumption power as areas with excessive photovoltaic output;
and judging whether the photovoltaic output of each power distribution area in the second power distribution areas is greater than the sum of the power of the load absorption and the power of the flexible load or not according to the second power distribution data, and taking the power distribution areas with the photovoltaic output greater than the sum of the conventional load consumption power and the flexible load consumption power as the areas with excessive photovoltaic output.
With reference to the first possible implementation manner of the second aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the apparatus further includes a sorting module, where the sorting module is configured to:
respectively sequencing each power distribution station area in the first type of power distribution station area and each power distribution station area in the second type of power distribution station area according to a preset sequence;
and arranging the areas with excessive photovoltaic output in the first type of power distribution areas in front of the areas with insufficient photovoltaic output in the first type of power distribution areas in sequence, and arranging the areas with excessive photovoltaic output in the second type of power distribution areas in front of the areas with insufficient photovoltaic output in the second type of power distribution areas in sequence.
The embodiment of the invention has the following beneficial effects: firstly, dividing a power distribution station into a first type power distribution station area without flexible load and a second type power distribution station area with flexible load, acquiring first type power distribution data and second power distribution data, and respectively screening out the station areas with excessive photovoltaic output in the two types of power distribution station areas; finally, distributing the power of the photovoltaic output surplus distribution area in the first type distribution area to the photovoltaic output surplus distribution area for consumption, and distributing the photovoltaic output surplus distribution area in the second type distribution area to the photovoltaic output surplus distribution area for consumption; when the interior of the first type of power distribution area can not be completely consumed, distributing the surplus photovoltaic output in the first type of power distribution area to the remaining areas with the photovoltaic output in the second type of power distribution area for consumption; therefore, the excess photovoltaic is eliminated, the impact influence of photovoltaic power generation on a large power grid is greatly reduced, and the reliability of photovoltaic power supply is improved; the waste of light is reduced, and the waste of clean energy is avoided; low cost and is suitable for popularization.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a multi-distribution-area photovoltaic output distribution method according to an embodiment of the present invention;
fig. 2 is a schematic system diagram of a first type of power distribution area and a second type of power distribution area according to an embodiment of the present invention;
fig. 3 is a flowchart of a charging method for an electric vehicle according to an embodiment of the present invention;
fig. 4 is a schematic diagram of input power of a power distribution area to a large power grid at 96 moments when A, B, C power distribution areas are unregulated according to an embodiment of the present invention;
fig. 5 is a schematic diagram of input power of a power distribution area to a large power grid at 96 moments after regulation and control by A, B, C power distribution areas according to an embodiment of the present invention;
fig. 6 is a system schematic diagram of a multi-distribution-bay photovoltaic output distribution apparatus according to a second embodiment of the present invention;
in the figure:
10-a classification module; 20-a data acquisition module; 30-a screening module; 40-a sorting module; 50-a first dispensing module; 60-second distribution module.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, the light abandoning phenomenon is serious, and with the improvement of photovoltaic permeability, how to ensure the reliability of power supply of an electric power system becomes one of the hot points of research, but at present, an effective means for reducing the light abandoning phenomenon through photovoltaic absorption is lacked, so that the power supply of the electric power system is unstable. Based on the above, the photovoltaic output distribution method and device for the multiple power distribution areas provided by the embodiment of the invention can eliminate the surplus photovoltaic output, and greatly reduce the light rejection rate, thereby reducing the impact influence of photovoltaic power generation on a large power grid and improving the reliability of photovoltaic power supply.
To facilitate understanding of the present embodiment, a detailed description is first given of a multi-distribution-area photovoltaic output distribution method disclosed in the present embodiment.
The first embodiment is as follows:
referring to fig. 1, the method for distributing photovoltaic output of multiple distribution areas provided by this embodiment includes the following steps:
step S100, dividing a power distribution station into a first type power distribution station area and a second type power distribution station area, wherein the first type power distribution station area comprises photovoltaic power generation equipment and a conventional load, and the second type power distribution station area comprises photovoltaic power generation equipment, a conventional load and a flexible load;
step S200, respectively acquiring first power distribution data of a first type of power distribution station area and second power distribution data of a second type of power distribution station area at intervals of a preset period; the first power distribution data comprise photovoltaic output and conventional load consumption power of each power distribution area in the first type of power distribution areas, and the second power distribution data comprise photovoltaic output, conventional load consumption power and flexible load consumption power of each power distribution area in the second type of power distribution areas;
step S300, respectively screening out a station area with excessive photovoltaic output in a first type of power distribution station area and a station area with excessive photovoltaic output in a second type of power distribution station area according to the first power distribution data and the second power distribution data;
step S400, distributing redundant photovoltaic output of the photovoltaic output surplus distribution area in the first type distribution area to the photovoltaic output surplus distribution area for consumption, and distributing redundant photovoltaic output of the photovoltaic output surplus distribution area in the second type distribution area to the photovoltaic output surplus distribution area for consumption;
and S500, distributing redundant photovoltaic output in the first type of power distribution area to the remaining areas with the photovoltaic output not being excessive in the second type of power distribution area for consumption.
Specifically, the preset period is 15min, and the photovoltaic output, the load consumption and the electric vehicle charging data of the second type of power distribution area are collected once every 15 min. The flexible load in this embodiment is an electric vehicle, and the power consumed by the flexible load acquired in step S200 is, specifically, the number of electric vehicles, the battery capacity, and the battery remaining amount are acquired for the electric vehicle. In the embodiment, renewable energy power generation is mainly adopted, as shown in fig. 2, a first type of distribution substation area includes a photovoltaic power generation unit and a conventional load, and a second type of distribution substation area includes a photovoltaic power generation unit, a conventional load and an electric vehicle. The photovoltaic power generation unit comprises a photovoltaic cell and a photovoltaic inverter (AC/DC converter), wherein the photovoltaic cell is used for converting solar energy into electric energy, and the photovoltaic inverter is mainly used for converting direct current generated by the photovoltaic cell into alternating current for load use. The first type of power distribution station area is provided with m power distribution station areas, and the second type of power distribution station area is provided with n power distribution station areas.
In this embodiment, the electric vehicle is used to absorb the surplus photovoltaic output that is not absorbed in the first-class distribution area. Fig. 3 is a flow chart of charging of electric vehicles in the second type of distribution station, which is a process of determining whether each electric vehicle needs to be charged, and if so, entering a charging link, charging at each moment, accumulating the charge amount of the cars and the vehicles taken by the employees, and then realizing the next power distribution as required. And when the SOC value reaches 90%, the car can exit the charging mode.
And after the steps S100-S500 are executed in the first 15min time scale, entering the scheduling distribution of the next 15min time scale, and repeatedly executing the steps S200-S500 until 96 time intervals in one day are finished.
Further, step S300 includes:
judging whether the photovoltaic output of each power distribution area in the first type of power distribution areas is larger than the load consumption power or not according to the first power distribution data, and taking the power distribution areas with the photovoltaic output larger than the load consumption power as areas with excessive photovoltaic output;
and judging whether the photovoltaic output of each power distribution area in the second power distribution areas is greater than the sum of the power of the load absorption and the power of the flexible load or not according to the second power distribution data, and taking the power distribution areas with the photovoltaic output greater than the sum of the conventional load consumption power and the flexible load consumption power as the areas with excessive photovoltaic output.
Specifically, for m power distribution areas of the first type of power distribution area, if the photovoltaic output is greater than the load consumption, it is determined that the power of the area is excessive. Similarly, for n distribution substations of the second type of distribution substation, if the photovoltaic output is greater than the sum of the load consumption and the power for charging the electric vehicle, it is determined that the power of the distribution substation is excessive. If there is no power excess in the cell, the procedure is terminated, and if there is power excess in the cell, the next step S400 is continued.
Further, after the step S300 is performed, the following steps are performed:
respectively sequencing each power distribution station area in the first type of power distribution station area and each power distribution station area in the second type of power distribution station area according to a preset sequence;
and arranging the areas with excessive photovoltaic output in the first type of power distribution areas in front of the areas with insufficient photovoltaic output in the first type of power distribution areas in sequence, and arranging the areas with excessive photovoltaic output in the second type of power distribution areas in front of the areas with insufficient photovoltaic output in the second type of power distribution areas in sequence.
Specifically, the first-type distribution areas are numbered in the original distribution sequence from small to large. And similarly, numbering the n distribution areas in the second type of distribution area from small to large according to the original distribution sequence.
And after numbering, screening out the table area with the excessive photovoltaic output. Specifically, the areas with excessive photovoltaic output in the first-type power distribution area are screened out and sequentially arranged in front of the areas without excessive photovoltaic output. And similarly, screening out the areas with excessive photovoltaic output in the second type of power distribution areas, and sequentially arranging the areas before the areas without excessive photovoltaic output.
That is, step S300 first determines whether there are two types of distribution areas with excess photovoltaic output, and if not, ends; otherwise, numbering m distribution areas in the first type of distribution areas in sequence, and numbering n distribution areas in the second type of distribution areas in sequence; then, carrying out the operation; and respectively screening the areas with excessive photovoltaic output in the two types of distribution areas, and arranging the areas before the areas with the excessive photovoltaic output in the belonging type areas.
Further, step S400 includes:
distributing redundant photovoltaic output of a photovoltaic output surplus distribution area in the first type of distribution area to an area with non-surplus photovoltaic output according to a preset sequence through a power exchanger for absorption;
and distributing redundant photovoltaic output of the photovoltaic output surplus distribution areas in the second type of distribution areas to the areas with the non-surplus photovoltaic output according to a preset sequence through a power exchanger for consumption.
Specifically, referring to fig. 2, m power distribution stations in the first type of power distribution station are each installed with a power switch, and n power distribution stations in the second type of power distribution station are each installed with a power switch. And distributing redundant photovoltaic output in the distribution transformer area of the category to transformer areas with non-redundant photovoltaic output in the distribution transformer area of the category through a power exchanger of the distribution transformer area of the category, wherein the transformer areas with non-redundant photovoltaic output are sequentially consumed from small to large according to the numbers.
Further, step S500 includes:
and distributing redundant photovoltaic output of the first type of power distribution area to the remaining areas with the photovoltaic output not being excessive in the second type of power distribution area for consumption through a power exchanger.
Specifically, referring to fig. 2, if there is redundant photovoltaic output in the first-type distribution substation, that is, when the redundant photovoltaic output of the first-type distribution substation cannot be completely consumed, the redundant photovoltaic output is distributed to the substation with the non-redundant photovoltaic output in the second-type distribution substation through the power switch, and the substations with the non-redundant photovoltaic output in the second-type distribution substation are sequentially consumed from small to large according to numbers.
It should be noted that when the photovoltaic output in the first-type distribution area is still redundant after the conventional load in the second-type distribution area consumes the photovoltaic output in the first-type distribution area, the redundant photovoltaic output is consumed by the electric vehicle.
It should be particularly noted that in the embodiment, when the redundant photovoltaic is consumed by the conventional load and the electric vehicle, there is a priority that the conventional load of the first type distribution area is better than the conventional load of the second type distribution area, and the conventional load of the second type distribution area is better than the electric vehicle. That is to say, the load of the surplus distribution area of the first type distribution area is preferentially used for carrying out the absorption, after the conventional load of the first type distribution area is absorbed, the conventional load of the second type distribution area is absorbed, and finally, the electric automobile is used for absorbing until all the electric automobiles absorb the surplus photovoltaic. In order to ensure that no redundant photovoltaic output exists after the electric automobile is consumed, the photovoltaic power generation on the same day is intelligently distributed through the following steps.
Further, the method further comprises:
respectively acquiring first photovoltaic output historical data of a first type of distribution area and second photovoltaic output historical data of a second type of distribution area;
and distributing the photovoltaic output to each distribution area of the first type of distribution area according to the first photovoltaic output historical data, and distributing the photovoltaic output to each distribution area of the second type of distribution area according to the second photovoltaic output historical data.
Specifically, the power generated by the photovoltaic power generation equipment at the corresponding time of the day can be intelligently set according to the historical data at the corresponding time by collecting the historical data at the previous day (or the previous days). The method comprises the specific steps of firstly fitting historical data of photovoltaic power generation into normal distribution; then, according to the photovoltaic output data (namely the conventional load demand) of the previous day, intelligently distributing the power generated by the photovoltaic power generation equipment to maintain the normal power utilization of the conventional load; finally, the redundant electric quantity in each 15min is consumed by adopting the conventional load in the affiliated class platform area; the first type of distribution station area still has redundant photovoltaic output, and then the conventional load of the second type of distribution station area is adopted for consumption, and when the first type of distribution station area still has surplus, the electric automobile in the second type of distribution station area is used for consumption. The historical data refers to the total output of photovoltaic power in each distribution area at each moment in 96 moments divided by 15min in one day. That is, in this step, the total photovoltaic output of the photovoltaic power generation devices in each platform area at each time of the previous day (or the previous days) is collected, and the total photovoltaic output of each platform area at the time corresponding to the photovoltaic of the current day is distributed by referring to the collected historical data.
Further, to further ensure that the photovoltaic output of the same day can be completely absorbed, the method further comprises:
predicting the total photovoltaic output prediction amount of the first type of distribution area and the second type of distribution area according to the first photovoltaic output historical data and the second photovoltaic output historical data;
and setting the number of the flexible loads according to the predicted total photovoltaic output, so that the power consumption demand of the flexible loads is greater than the predicted total photovoltaic output.
Specifically, according to historical data of the previous day (or the previous days), the sum of the photovoltaic output of the first type of distribution area and the photovoltaic output of the second type of distribution area is calculated to obtain the total photovoltaic output of the previous day, the total photovoltaic output of the current day is predicted according to the historical data of the total photovoltaic output, and the number of the electric automobiles needing to be charged is calculated and set according to the predicted total photovoltaic output of the current day, so that the electric energy demand of the electric automobiles is always larger than or equal to the total photovoltaic output, and the residual photovoltaic output of the two types of distribution areas can be completely absorbed by the electric automobiles.
Referring to fig. 4, fig. 4 illustrates A, B, C power distribution bays as an example; A. b is a first-class power distribution area, and the A, B power distribution areas have excess photovoltaic output in the noon; and C is a second type of power distribution station area, and the situation of surplus photovoltaic output does not occur all day. Taking 15min as a period, one day is divided into 96 periods. The figure is an input power diagram of three power distribution areas with 96 periods A, B, C to a large power grid when the input power is not regulated. The figure shows clearly 96 periods of power input and consumption, including A, B, C for the case of power being returned to the large grid for each of the three stations. As can be seen from the figure, when unregulated, both the a and B bays may return power to the large grid due to excess photovoltaic output.
Fig. 5 is a graph of the input power of the distribution station to the large power grid at 96 distributed moments, which clearly shows 96 periods, the power input and the power consumption of each period, wherein the power input and the power consumption of each period comprise the case that power is returned to the large power grid in each period of A, B, C three stations, and the case that power is consumed by electric vehicles in the station C. As can be seen from the figure, the power returned to the large power grid by the three stations at each time interval A, B, C is less than or equal to zero. The effect that the power in the micro-grid can be automatically absorbed and is not returned to the large power grid is proved by the embodiment.
The embodiment has the following beneficial effects:
(1) photovoltaic output in each power distribution area is distributed to conventional loads of each power distribution area and electric vehicles for consumption, so that all photovoltaic electric energy in the power distribution areas is consumed, and electric energy impact on a large power grid when photovoltaic is excessive is completely avoided;
(2) the defects of large photovoltaic power generation volatility and randomness are overcome;
(3) the photovoltaic output is completely consumed, no light abandonment is realized, and an effective solution is provided for new energy grid connection;
(4) for a large power grid, the power returned to the large power grid due to the surplus photovoltaic output does not need to be borne, and the service life of a transformer connected between a distribution area and the large power grid is prolonged;
(5) the addition of a fixed energy storage battery is not needed, so that the cost is greatly reduced;
(6) the environment-friendly electric automobile is used as a tool for absorbing and storing energy, and harmonious ecological assistance is constructed for protecting the environment;
(7) the economic benefit of power generation enterprises is ensured;
(8) has important significance for the healthy and sustainable development of new energy in China.
Example two:
referring to fig. 6, the multi-distribution-area photovoltaic output distribution device provided in this embodiment includes a classification module 10, a data acquisition module 20, a screening module 30, a first distribution module 50, and a second distribution module 60;
the classification module 10 is configured to classify the power distribution panel into a first type power distribution panel and a second type power distribution panel, where the first type power distribution panel includes a photovoltaic power generation device and a conventional load, and the second type power distribution panel includes a photovoltaic power generation device, a conventional load and a flexible load;
the data acquisition module 20 is configured to acquire first power distribution data of a first-type power distribution area and second power distribution data of a second-type power distribution area at intervals of a preset period; the first power distribution data comprise photovoltaic output and conventional load consumption power of each power distribution area in the first type of power distribution areas, and the second power distribution data comprise photovoltaic output, conventional load consumption power and flexible load consumption power of each power distribution area in the second type of power distribution areas;
the screening module 30 is configured to screen out a distribution area with excessive photovoltaic output in the first type distribution area and a distribution area with excessive photovoltaic output in the second type distribution area according to the first distribution data and the second distribution data;
the first distribution module 50 is configured to distribute redundant photovoltaic output of a region with excess photovoltaic output in a first-class distribution region to a region with no excess photovoltaic output for consumption, and distribute redundant photovoltaic output of a region with excess photovoltaic output in a second-class distribution region to a region with no excess photovoltaic output for consumption;
the second distribution module 60 is used for distributing the redundant photovoltaic output in the first type distribution area to the remaining areas without the photovoltaic output in the second type distribution area for consumption.
Further, the screening module 30 is further configured to:
judging whether the photovoltaic output of each power distribution area in the first type of power distribution areas is larger than the load consumption power or not according to the first power distribution data, and taking the power distribution areas with the photovoltaic output larger than the load consumption power as areas with excessive photovoltaic output;
and judging whether the photovoltaic output of each power distribution area in the second power distribution areas is greater than the sum of the power of the load absorption and the power of the flexible load or not according to the second power distribution data, and taking the power distribution areas with the photovoltaic output greater than the sum of the conventional load consumption power and the flexible load consumption power as the areas with excessive photovoltaic output.
Further, a sorting module 40 is included, the sorting module 40 is configured to:
respectively sequencing each power distribution station area in the first type of power distribution station area and each power distribution station area in the second type of power distribution station area according to a preset sequence;
and arranging the areas with excessive photovoltaic output in the first type of power distribution areas in front of the areas with insufficient photovoltaic output in the first type of power distribution areas in sequence, and arranging the areas with excessive photovoltaic output in the second type of power distribution areas in front of the areas with insufficient photovoltaic output in the second type of power distribution areas in sequence.
Further, the first allocating module 50 is specifically:
distributing redundant photovoltaic output of a photovoltaic output surplus distribution area in the first type of distribution area to an area with non-surplus photovoltaic output according to a preset sequence through a power exchanger for absorption;
and distributing redundant photovoltaic output of the photovoltaic output surplus distribution areas in the second type of distribution areas to the areas with the non-surplus photovoltaic output according to a preset sequence through a power exchanger for consumption.
Further, the second allocating module 60 is specifically:
and distributing redundant photovoltaic output of the first type of power distribution area to the remaining areas with the photovoltaic output not being excessive in the second type of power distribution area for consumption through a power exchanger.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. A multi-distribution-platform-area photovoltaic output distribution method is characterized by comprising the following steps:
dividing the power distribution station area into a first type power distribution station area and a second type power distribution station area, wherein the first type power distribution station area comprises photovoltaic power generation equipment and a conventional load, and the second type power distribution station area comprises photovoltaic power generation equipment, a conventional load and a flexible load; wherein the flexible load is an electric vehicle;
respectively acquiring first power distribution data of the first type of power distribution station area and second power distribution data of the second type of power distribution station area every other preset period; the first power distribution data comprise photovoltaic output and conventional load consumption power of each power distribution area in the first type of power distribution areas, and the second power distribution data comprise photovoltaic output, conventional load consumption power and flexible load consumption power of each power distribution area in the second type of power distribution areas;
respectively screening out a station area with excessive photovoltaic output in the first type of power distribution station area and a station area with excessive photovoltaic output in the second type of power distribution station area according to the first power distribution data and the second power distribution data;
distributing redundant photovoltaic output of the photovoltaic output surplus distribution area in the first type distribution area to an area with non-surplus photovoltaic output for consumption, and distributing redundant photovoltaic output of the photovoltaic output surplus distribution area in the second type distribution area to an area with non-surplus photovoltaic output for consumption;
distributing redundant photovoltaic output force in the first type of power distribution area to the remaining areas with the photovoltaic output force not enough in the second type of power distribution area for consumption;
the method further comprises the following steps:
respectively collecting first photovoltaic output historical data of the first type of distribution area and second photovoltaic output historical data of the second type of distribution area;
distributing photovoltaic output to each distribution area of the first type of distribution areas according to the first photovoltaic output historical data, and distributing photovoltaic output to each distribution area of the second type of distribution areas according to the second photovoltaic output historical data;
predicting the total photovoltaic output prediction amount of the first type of distribution area and the second type of distribution area according to the first photovoltaic output historical data and the second photovoltaic output historical data;
and setting the quantity of the flexible loads according to the predicted total photovoltaic output, so that the power consumption demand of the flexible loads is greater than the predicted total photovoltaic output.
2. The method according to claim 1, wherein the step of screening out the areas with excessive photovoltaic output in the first type of distribution area and the areas with excessive photovoltaic output in the second type of distribution area according to the first distribution data and the second distribution data comprises:
judging whether the photovoltaic output of each power distribution area in the first type of power distribution areas is larger than the load consumption power or not according to the first power distribution data, and taking the power distribution areas with the photovoltaic output larger than the load consumption power as areas with excessive photovoltaic output;
and judging whether the photovoltaic output of each distribution area in the second type of distribution areas is greater than the sum of the power of the load absorption and the power of the flexible load or not according to the second distribution data, and taking the distribution areas with the photovoltaic output greater than the sum of the conventional load consumption power and the flexible load consumption power as the areas with excessive photovoltaic output.
3. The method of claim 2, further comprising:
respectively sequencing each power distribution station area in the first type of power distribution station area and each power distribution station area in the second type of power distribution station area according to a preset sequence;
and arranging the areas with excessive photovoltaic output in the first type of power distribution areas in sequence before the areas with insufficient photovoltaic output in the first type of power distribution areas, and arranging the areas with excessive photovoltaic output in the second type of power distribution areas in sequence before the areas with insufficient photovoltaic output in the second type of power distribution areas.
4. The method according to claim 3, wherein the step of distributing the redundant photovoltaic output of the region with the excessive photovoltaic output to the region with the non-excessive photovoltaic output in the first-type distribution region for consumption, and distributing the redundant photovoltaic output of the region with the excessive photovoltaic output in the second-type distribution region to the region with the non-excessive photovoltaic output for consumption comprises:
distributing redundant photovoltaic output of the photovoltaic output surplus distribution area in the first type of distribution area to the photovoltaic output surplus distribution area for consumption according to the preset sequence through a power exchanger;
and distributing the redundant photovoltaic output of the photovoltaic output surplus distribution areas in the second type of distribution areas to the areas with the non-redundant photovoltaic output according to the preset sequence through a power exchanger for consumption.
5. The method of claim 4, wherein the step of distributing the excess photovoltaic output of the first distribution grid to the remaining photovoltaic output of the second distribution grid for consumption comprises:
and distributing redundant photovoltaic output of the first type of power distribution area to the remaining areas with the photovoltaic output not being excessive in the second type of power distribution area for consumption through a power exchanger.
6. The photovoltaic output distribution device for the multiple power distribution areas is characterized by comprising a classification module, a data acquisition module, a screening module, a first distribution module and a second distribution module;
the classification module is used for classifying the power distribution station into a first type power distribution station area and a second type power distribution station area, wherein the first type power distribution station area comprises photovoltaic power generation equipment and a conventional load, and the second type power distribution station area comprises photovoltaic power generation equipment, a conventional load and a flexible load; wherein the flexible load is an electric vehicle;
the data acquisition module is used for respectively acquiring first power distribution data of the first type of power distribution station area and second power distribution data of the second type of power distribution station area at intervals of a preset period; the first power distribution data comprise photovoltaic output and conventional load consumption power of each power distribution area in the first type of power distribution areas, and the second power distribution data comprise photovoltaic output, conventional load consumption power and flexible load consumption power of each power distribution area in the second type of power distribution areas;
the screening module is used for screening out a region with excessive photovoltaic output in the first type of power distribution region and a region with excessive photovoltaic output in the second type of power distribution region respectively according to the first power distribution data and the second power distribution data;
the first distribution module is used for distributing redundant photovoltaic output of the photovoltaic output surplus distribution area in the first type distribution area to an area with non-surplus photovoltaic output for consumption, and distributing redundant photovoltaic output of the photovoltaic output surplus distribution area in the second type distribution area to an area with non-surplus photovoltaic output for consumption;
the second distribution module is used for distributing redundant photovoltaic output in the first type of distribution area to the remaining areas with the photovoltaic output not being excessive in the second type of distribution area for consumption; respectively collecting first photovoltaic output historical data of the first type of distribution area and second photovoltaic output historical data of the second type of distribution area; distributing photovoltaic output to each distribution area of the first type of distribution areas according to the first photovoltaic output historical data, and distributing photovoltaic output to each distribution area of the second type of distribution areas according to the second photovoltaic output historical data; predicting the total photovoltaic output prediction amount of the first type of distribution area and the second type of distribution area according to the first photovoltaic output historical data and the second photovoltaic output historical data; and setting the quantity of the flexible loads according to the predicted total photovoltaic output, so that the power consumption demand of the flexible loads is greater than the predicted total photovoltaic output.
7. The multi-distribution-bay photovoltaic output distribution apparatus of claim 6, wherein the screening module is further configured to:
judging whether the photovoltaic output of each power distribution area in the first type of power distribution areas is larger than the load consumption power or not according to the first power distribution data, and taking the power distribution areas with the photovoltaic output larger than the load consumption power as areas with excessive photovoltaic output;
and judging whether the photovoltaic output of each distribution area in the second type of distribution areas is greater than the sum of the power of the load absorption and the power of the flexible load or not according to the second distribution data, and taking the distribution areas with the photovoltaic output greater than the sum of the conventional load consumption power and the flexible load consumption power as the areas with excessive photovoltaic output.
8. The multi-distribution-bay photovoltaic output distribution device of claim 7, further comprising a ranking module configured to:
respectively sequencing each power distribution station area in the first type of power distribution station area and each power distribution station area in the second type of power distribution station area according to a preset sequence;
and arranging the areas with excessive photovoltaic output in the first type of power distribution areas in front of the areas with insufficient photovoltaic output in the first type of power distribution areas in sequence, and arranging the areas with excessive photovoltaic output in the second type of power distribution areas in front of the areas with insufficient photovoltaic output in the second type of power distribution areas in sequence.
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