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Static var compensator grouped coordination control method

A technology of static reactive power compensation and coordinated control, which is applied in reactive power adjustment/elimination/compensation, circuit devices, AC network circuits, etc., and can solve the problems of weakening voltage dynamic stability and increasing loss.

Active Publication Date: 2016-04-06
NARI TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using a single constant reactive power mode or constant voltage mode cannot solve the problem of how to give full play to the rapid adjustment ability of SVG and reduce reactive power fluctuations between multiple SVGs at the same time, weakening the dynamic stability of voltage and causing increased losses due to reactive power fluctuations

Method used

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  • Static var compensator grouped coordination control method
  • Static var compensator grouped coordination control method
  • Static var compensator grouped coordination control method

Examples

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Embodiment

[0052] Such as figure 1 Shown is the wiring diagram of the control group composed of multiple SVGs. The 3 SVG devices are connected to the low-voltage side of the main transformer T1. The rated capacity of the SVG numbered MG is ±15MVar, the upper limit of controllable reactive power is 15MVar, and the lower limit of reactive power is - 15MVar; the other two SVGs are numbered SG1 and SG2 respectively, their rated capacity is ±12MVar, the upper limit of controllable reactive power is 12MVar, and the lower limit of reactive power is -12MVar. Define the high-voltage side of the main transformer as the grid connection point, and the busbar on the low-voltage side of the main transformer as the collector busbar.

[0053] use figure 2 Shown the inventive method, step flow process is:

[0054] 1) Establish a low-voltage side SVG control group with the main transformer unit, set MG to constant voltage mode, and set SG1 and SG2 to constant reactive power mode;

[0055] 2) At the be...

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Abstract

The invention discloses a hybrid mode based static var compensator (SVG) grouped coordination control method. In application, the method comprises the following steps: first, establishing low-voltage side SVG control groups by taking a main transformer as a unit, wherein each control group at least comprises two sets of SVG, the SVG with highest rated capacity is set into a constant voltage mode and the rest are set into a constant var mode; then, with the aim of tracing the var need of grid connection points, distributing the total var need to each main transformer and calculating the var voltage target value of the low-voltage side SVG control groups of the main transformers; and with the aim of reducing var shift among SVGs in each control group and optimizing dynamic var reserve, performing var replacement on the low-voltage side SVG control groups of the main transformers. The method can be used for realizing multi-aim control, including restraining the rapid fluctuation and flickering of a convergent bus, tracing the voltage var need of the grid connection points and optimizing var distribution, thereby improving dynamic voltage stability and reducing loss.

Description

technical field [0001] The invention relates to the technical field of power system control, in particular to a method for group coordinated control of static var compensation devices based on a hybrid mode. Background technique [0002] Static var compensator (SVC) or static var generator (SVG) are two important types of static var compensation devices that can compensate reactive power in rapid succession. Compared with reactive power compensation devices such as capacitors, it has the advantages of suppressing voltage fluctuations and flicker, improving dynamic voltage stability, etc., and has been widely used in systems with large fluctuations. Among them, SVG has a faster dynamic response speed than SVC, which represents the development direction of advanced reactive power compensation technology. For the convenience of description, only SVG is used to replace the static var compensation device below, but the method of the present invention is fully applicable to SVC. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18
CPCH02J3/1842Y02E40/10
Inventor 黄华徐陆飞滕贤亮白恺陈建华杜磊杨洛马晓青
Owner NARI TECH CO LTD