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An Access System of Static Var Generator

A static reactive power, access system technology, applied in flexible AC transmission systems, reactive power adjustment/elimination/compensation and other directions, can solve problems such as protection malfunction, interference with grid equipment, large peak value, etc., to avoid impact.

Active Publication Date: 2016-06-15
HAINAN JINPAN INTELLIGENCE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the surge time is short, but the peak value is large, it will often have a large impact on the grid and the static var generator itself, which may interfere with other equipment on the grid, and even cause protection malfunctions

Method used

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  • An Access System of Static Var Generator
  • An Access System of Static Var Generator
  • An Access System of Static Var Generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] figure 1 A static var generator access system provided by the embodiment of this application.

[0037] Such as figure 1 As shown, the access system disclosed in this embodiment includes a current limiting resistor R, a closing switch K1 , a first sensor 30 , a second sensor 40 and a comparison device 50 . Among them: one end of the current-limiting resistor R is connected to the high-voltage bus 10 of the power grid, and the other end is connected to the series reactor L of the static var generator 20; the closing switch K1 is connected in parallel with the current-limiting resistor R, that is, the closing switch K1 The two ends of the two ends of the current-limiting resistor R are connected respectively; the first sensor 30 is connected with the high-voltage bus 10; the second sensor 40 is connected with the power output terminal B of the static var generator 20; the comparison device 50 is respectively connected with The first sensor 30 and the second sensor 40 are...

Embodiment 2

[0047] figure 2 A structural diagram of a static var generator access system provided by another embodiment of the present application.

[0048] Such as figure 2 As shown, the access system provided in this embodiment is based on the previous embodiment with the addition of a grid switch K2. The grid switch K2 is arranged between the series resistor R and the high voltage bus 10 of the grid.

[0049] The grid switch K2 is used to connect or disconnect the electrical connection between the series resistor R and the high-voltage bus 10 to input current to the static var generator 20 to start charging or to disconnect the static var generator 20 from the grid.

[0050] The grid switch K2 is preferably a contactor or a circuit breaker.

Embodiment 3

[0052] image 3 It is a structural diagram of a static var generator access system disclosed in another embodiment of the present application.

[0053] Such as image 3 As shown, the access system disclosed in this embodiment adds a closing device 60 on the basis of the previous embodiment. The closing device is respectively connected with the closing switch K1 and the comparing device 50 .

[0054] The closing device 60 is used to control the closing switch K1 to close according to the closing signal output by the comparing device 50 .

[0055] When the comparison device 50 outputs a closing signal, it indicates that the frequency, amplitude and phase of the voltages at the two points are consistent, and the closing device 60 controls the closing switch K1 to close, and connects the static var generator 20 to the power grid.

[0056] The additional closing device 60 can replace the manual closing operation, increasing the degree of automation.

[0057] In the above embodi...

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Abstract

The invention discloses an access system for a static var generator. The access system for the static var generator comprises a current-limiting resistor, a closing switch, a first sensor, a second sensor and a comparison device, wherein the current-limiting resistor is used for charging the static var generator in advance; then, the frequency, the amplitude and the phase of the voltage of the high-voltage bus of a power grid and the frequency, the amplitude and the phase of the voltage of the power output end of the static var generator are detected; when the frequency, the amplitude and the phase of the voltage of the high-voltage bus of the power grid and the frequency, the amplitude and the phase of the voltage of the power output end of the static var generator are consistent, the closing switch can be closed; because the frequency, the amplitude and the phase of the voltage of the high-voltage bus of the power grid and the frequency, the amplitude and the phase of the voltage of the power output end of the static var generator are consistent, no impulse current is generated; therefore, impact on the power grid and the static var generator can be avoided.

Description

technical field [0001] The present application relates to the technical field of power electronics, and more specifically, relates to a static var generator access system. Background technique [0002] At present, in the field of high-voltage reactive power compensation technology, static var compensation technology is developing rapidly, and the technology is becoming more mature and widely used. The static var generator can automatically adjust the output reactive power according to the specific conditions of the power grid, has a fast response speed, and can fully realize stepless and accurate compensation. [0003] At the moment when the static var generator is connected to the grid, a surge current is often generated. Although the surge time is short, but the peak value is large, it will often have a large impact on the grid and the static var generator itself, which may interfere with other equipment on the grid, and even cause protection malfunctions. Contents of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/10
Inventor 罗乃好梁洪杜健顾硕
Owner HAINAN JINPAN INTELLIGENCE TECH CO LTD
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