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A multi-site fast switching capacitor control method

A technology of switching capacitors and control methods, which is applied in the direction of instruments, circuit devices, AC network circuits, etc., can solve the problems of not considering the coordination of various sites, and the inability to maximize the effectiveness of capacitors, etc., and achieve the effect of improving voltage stability

Active Publication Date: 2022-08-09
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, this control strategy can only consider a single site, without considering the coordination between sites, and cannot maximize the effectiveness of capacitors in each substation

Method used

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  • A multi-site fast switching capacitor control method
  • A multi-site fast switching capacitor control method
  • A multi-site fast switching capacitor control method

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Embodiment Construction

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] In order to facilitate the understanding of the present invention, the preferred embodiments of the present invention will be further described below.

[0026] The control strategy of fast switching capacitors is generally that when a short-circuit fault occurs in the AC system, when the voltage drops below a preset threshold, a certain amount of capacitors are switched on after a delay for a period of time. The input quantity ...

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Abstract

The invention discloses a multi-site fast switching capacitor control method, including acquiring mode data, a busbar set and a fault set of a substation to be optimized; according to the mode data, the busbar set and fault set of the substation to be optimized, Establish an optimization model about the input amount of fast switching capacitors and the threshold of operating voltage; solve the optimization model to obtain the optimal solution of the optimization model, and use the optimal solution of the optimization model as the switching control parameter; according to Switching control parameters to control the operation of multi-site fast switching capacitors. The method fully considers the influence of the control parameters of fast switching capacitors between different stations on the transient stability of the system voltage, determines the optimal capacity and operating voltage threshold of the fast switching capacitors in each substation, and ensures fast switching between multiple stations. The coordination of switching capacitors makes the quick switching capacitors in each substation play the best role.

Description

technical field [0001] The invention relates to the technical field of substation capacitor control, in particular to a multi-site fast switching capacitor control method. Background technique [0002] For large-scale receiving-end power grids (especially in the case of multiple conventional DC feeds), when a severe short-circuit fault occurs in the AC system and the system recovery stage after the fault is removed, the receiving-end power grid often needs a large amount of dynamic reactive power support to maintain its temporary The state voltage is stable. It is a relatively common method to use fast switching capacitors as an effective dynamic reactive power source in the receiving-end power grid. Quick switching capacitors refer to low-voltage capacitor banks controlled by reactive power control devices in substations (mainly 220kV and above), which can be obtained by modifying the monitoring system of low-voltage capacitor banks in the substation. The fast switching c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16G06F30/27G06F113/04
CPCH02J3/16G06F30/27H02J2203/20G06F2113/04Y02E40/30
Inventor 叶萌陈雁赵宏伟付超李晶谢宇翔尚慧玉陈志聪刘婷
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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