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Reactive-voltage control method and system of regional power-grid substations

A voltage control method and technology for regional power grids, applied in reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve the problem of output capacity and capacitor capacity offset, affecting power system security, and lack of AVC system coordination work, etc. problems, to achieve the effect of improving the level of control, improving safety, and reducing the number of

Active Publication Date: 2012-11-28
ZHONGSHAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID
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Problems solved by technology

However, the control of the existing dynamic reactive power compensation devices is aimed at local power loads, and they do not have the ability to coordinate with the regional AVC system. If they do not work in coordination, the output capacity of the dynamic reactive power compensation device and the capacity of the capacitor may be offset. , affecting the security of the power system

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  • Reactive-voltage control method and system of regional power-grid substations
  • Reactive-voltage control method and system of regional power-grid substations

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Embodiment Construction

[0019] In order to facilitate understanding of the present invention, it will be described below in conjunction with the accompanying drawings.

[0020] The present invention proposes a method for controlling reactive power and voltage of substations in regional power grids, please refer to figure 1 , including the steps:

[0021] S 101. Obtain the reactive power command issued by the AVC system to each main transformer in each substation;

[0022] Obtain the reactive power command issued by the AVC system to each main transformer in each substation; among them, the reactive power command is used to indicate the reactive power that each main transformer needs to compensate (the reactive power compensation value of each main transformer ).

[0023] S102, monitoring the busbar voltage at each substation side;

[0024] S103. Control the dynamic reactive power compensation device and the capacitor bank to perform reactive power compensation for the regional power grid where the...

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Abstract

The invention provides a reactive-voltage control method of regional power-grid substations. The reactive-voltage control method comprises the following steps of: acquiring a reactive power instruction issued by an AVC (Automatic Voltage Control) system for each main transformer in all the substations, wherein the reactive power instruction is used for representing the reactive power required to be compensated by each main transformer; monitoring busbar voltage of each substation side; and controlling a dynamic reactive compensation device and a capacitor group to carry out reactive power compensation on respective regional power grids according to monitored conditions of the busbar voltage and the reactive power instruction, wherein the dynamic reactive compensation device and the capacitor group belong to the current substation. The invention also provides a reactive-voltage control system of the regional power-grid substations. The method and the device have the advantages that the coordination work of the dynamic reactive compensation device and the regional AVC system can be realized, the continuous reactive power compensation can be rapidly provided, the control level of the reactive voltage of the substations is greatly improved, the security of a power system is improved and the cost for the reactive power control is reduced.

Description

technical field [0001] The invention relates to the field of grid reactive power control, in particular to a method and system for controlling reactive power voltage of substations in regional grids. Background technique [0002] At present, the reactive power and voltage control of the regional power grid is mainly completed by the automatic voltage control AVC system. Under the control of the AVC system, the main transformer taps and capacitor banks of the substation will perform corresponding actions to keep the grid voltage stable and reactive power balanced. However, since the existing reactive power compensation devices in substations are mainly static reactive power compensation devices, that is, capacitor banks; their reactive power compensation capacity is discontinuous and the response speed is slow, which affects the reactive power and voltage regulation effect of the overall power grid; in addition, due to Capacitor banks are expensive; [0003] Dynamic reactive...

Claims

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Application Information

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IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 蔡永智张峻徐力
Owner ZHONGSHAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID
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