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Photovoltaic power generation frequency modulation method and system based on variable reserve capacity

A technology of reserve capacity and photovoltaic power generation, which is applied in the direction of complex mathematical operations, reduction/prevention of power oscillation, single-network parallel feed arrangement, etc., and can solve problems such as utilization of the Internet, rough frequency modulation reserve capacity, and inflexible frequency modulation capabilities of photovoltaic power stations.

Pending Publication Date: 2022-07-15
国网青海省电力公司清洁能源发展研究院 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the setting of the frequency regulation reserve capacity of photovoltaic power plants is relatively rough at present. It is usually a fixed value (such as 10% of the rated capacity) or simply changes according to the light intensity, which makes the frequency regulation capability of photovoltaic power plants not flexible enough, and may cause some electricity to be unavailable. Effective use of the Internet

Method used

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  • Photovoltaic power generation frequency modulation method and system based on variable reserve capacity
  • Photovoltaic power generation frequency modulation method and system based on variable reserve capacity
  • Photovoltaic power generation frequency modulation method and system based on variable reserve capacity

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Embodiment 1

[0060] The present disclosure provides a photovoltaic power generation frequency regulation method based on variable reserve capacity, comprising the following steps:

[0061] Obtain the historical frequency data of the regional power grid;

[0062] According to the historical frequency data, determine the probability distribution of each frequency in each period in the historical frequency data;

[0063] Generate a probability distribution map according to the probability distribution, and determine the frequency bimodal characteristics;

[0064] According to the characteristics of frequency double peaks, build a frequency regulation reserve capacity function model;

[0065] According to the frequency regulation reserve capacity function model, determine the first proportion of the real-time maximum available generation power of the photovoltaic power station;

[0066] According to the real-time maximum available generation power of the photovoltaic power station, the adjus...

Embodiment 2

[0111] Based on the same principle as the method shown in Embodiment 1 of the present invention, as shown in the appendix Image 6 As shown, an embodiment of the present invention also provides a photovoltaic power generation frequency regulation system based on variable reserve capacity, including a first acquisition unit, a statistics unit, a first processing unit, a first function model building unit, and a first output unit , a second function model building unit, a second output unit, a second processing unit and an adjustment unit;

[0112] the first obtaining unit, configured to obtain historical frequency data of the regional power grid;

[0113] the statistical unit, configured to determine the probability distribution of each frequency in each period in the historical frequency data according to the historical frequency data;

[0114] the first processing unit, configured to generate a probability distribution map according to the probability distribution, and deter...

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Abstract

The invention provides a photovoltaic power generation frequency modulation method and system based on variable reserve capacity. The method comprises the following steps: acquiring historical frequency data; determining probability distribution of each frequency in each period; generating a probability distribution diagram, and determining frequency double-peak characteristics; constructing a frequency modulation reserve capacity function model; determining a first proportion of the real-time maximum available power generation power of the photovoltaic power station; setting an adjustment coefficient, and constructing a reserve capacity correction function model; correcting the first proportion to obtain a second proportion of the real-time maximum available power generation power of the photovoltaic power station; determining the frequency modulation reserve capacity of the photovoltaic power station; and the inverter is used for adjusting the real-time power generation power of the photovoltaic power station in real time. By analyzing the historical frequency of the region, the frequency modulation demand of each time period every day is obtained, the frequency modulation reserve capacity is calculated in real time according to the real-time maximum available power generation power of the photovoltaic power station, the photovoltaic frequency modulation capacity is improved, the reserve capacity waste is reduced, and the photovoltaic power generation capacity is increased.

Description

technical field [0001] The invention relates to the technical field of frequency regulation of power systems, and in particular, to a method and system for frequency regulation of photovoltaic power generation based on variable reserve capacity. Background technique [0002] The power grid frequency change in a region is related to various factors, such as the frequency regulation performance of each AGC unit in the region, the load characteristics of regional factories and residents, weather, holidays, etc. Frequency regulation of the regional grid. [0003] During the normal operation of the photovoltaic power station, a part of the generated power is spared, so that the photovoltaic power station has the primary frequency modulation capability, which is one of the main methods for the photovoltaic power station to participate in the primary frequency modulation. However, at present, the setting of the frequency regulation reserve capacity of photovoltaic power plants is ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/24G06F17/11
CPCH02J3/38H02J3/241G06F17/11H02J2300/24H02J2203/20H02J2203/10
Inventor 李春来杨立滨李正曦郑天文李志青刘庭响周万鹏张程云安娜马国福
Owner 国网青海省电力公司清洁能源发展研究院
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