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A reactive power and voltage control method for wind-solar-storage combined power station

A voltage control method and power station technology, which are applied in reactive power compensation, AC network voltage adjustment and other directions, and can solve the problem of no multi-source reactive power coordination control method.

Active Publication Date: 2020-03-20
STATE GRID CORP OF CHINA +1
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AI Technical Summary

Problems solved by technology

[0006] According to the search, the research on the coordinated control method of energy storage system and renewable energy such as wind power and photovoltaic power generation at home and abroad is mainly focused on active power control. At present, there is no effective multi-source system for wind, light, storage and reactive power compensation devices. Reactive power coordinated control method, controlling the voltage control command issued by the grid-connected point voltage tracking dispatch of the wind-solar-storage combined power generation system

Method used

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  • A reactive power and voltage control method for wind-solar-storage combined power station

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Embodiment

[0043] Embodiment: A method for controlling reactive power and voltage of a wind-solar-storage combined power station (see figure 1 ), characterized in that it comprises the following steps:

[0044] (1) Obtain the voltage target value U of the grid-connected point of the wind-solar-storage combined power station issued by the dispatching system target , to obtain the measured value U of the busbar voltage at the grid-connected point mea And the real-time status data, operation information and electrical quantity information of the booster station of the wind turbine, photovoltaic inverter, energy storage converter and reactive power compensation device;

[0045] (2) According to the formula ΔU=|U target -U mea |Calculate the voltage deviation ΔU of the grid-connected point of the wind-solar-storage combined power station; if the voltage deviation ΔU is within the preset voltage deviation dead zone threshold, the wind-solar-storage combined power station will not perform re...

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Abstract

Provided is a wind and solar energy storage combined power station reactive voltage control method which can provide a wind and solar energy storage combined power station reactive distribution method according to the deviation between a wind and solar energy storage combined power station grid-connected point voltage target value and a grid-connected point bus voltage measured value. The method considers the reactive capabilities of all reactive power sources under each main transformer of a wind and solar energy storage combined power station, fully utilizes the regulation rapidity of a dynamic reactive power compensation device, realizes the reactive coordination control of a draught fan, a photovoltaic inverter, an energy storage converter and a reactive compensation device, ad meets the power grid reactive voltage requirement for a wind and solar energy storage combined power station.

Description

[0001] (1) Technical field: [0002] The invention relates to the technical field of power system control technology, in particular to a method for controlling reactive power and voltage of a wind-solar-storage combined power station. [0003] (two) background technology: [0004] In recent years, the power generation of renewable clean energy such as wind energy and solar energy has been vigorously developed. Wind energy and solar power generation have the characteristics of randomness, intermittence, and volatility. The large-scale access of wind energy and solar power generation has a great impact on the safe and stable operation of the power system. Among them, the problem of reactive power and voltage is the most common in actual operation. one of the problems. [0005] At present, most newly-built wind farms and photovoltaic power stations are equipped with reactive power compensation devices of corresponding capacity, and are controlled and managed according to system r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16
CPCH02J3/16Y02E40/30
Inventor 任巍曦牛虎寇建刘宏勇
Owner STATE GRID CORP OF CHINA
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