Method for fault analysis and location of thyristor controlled reactor of static var compensator

A technology of static var compensation and thyristor control, applied in the direction of fault location, etc., can solve the problems of unsuitable SVC operating site environment, complex and cumbersome detection devices and methods, and high requirements for detection environment and site

Active Publication Date: 2017-01-25
STATE GRID CORP OF CHINA +2
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these detection devices and methods are too complicated and cumbersome, and the detection envi

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  • Method for fault analysis and location of thyristor controlled reactor of static var compensator
  • Method for fault analysis and location of thyristor controlled reactor of static var compensator
  • Method for fault analysis and location of thyristor controlled reactor of static var compensator

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Embodiment Construction

[0042] The following will be figure 1 The static var compensator (SVC) shown is taken as an example, and the method for analyzing and locating the fault of the thyristor-controlled reactor of the static var compensator of the present invention is further described.

[0043] see figure 1 , the static var compensator includes three-phase thyristor control branches connected in parallel to the busbar of the 35kV power line, and each phase thyristor control branch has 24 thyristor valve groups ( figure 1 The control system of the static var compensator is respectively connected to the control terminals of each thyristor valve group, and is used to control the three-phase thyristor control branch for reactive power compensation. The control system is phase-separated and phase-locked. There are two phase-controlled reactors controlled by thyristors in each phase, and the rated inductance of each equal value is about 0.0275H (factory measured value). Phase a of the TCR branch is fa...

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Abstract

The invention discloses a method for fault analysis and location of thyristor controlled reactor of static var compensator,which comprises the step of identifying and locating a fault source gradually by analyzing and calculating the waveform recorded during the fault period,analyzing the abnormalities of the bus line voltage to distinguish the internal fault from the external fault, distinguishing the main link fault or other link/equipment faults in the control system by analyzing whether the three-phase current is abnormal at the same time, and calculating the third-harmonic component in the current to distinguish thyristor valve block control failure from reactor failure. The invention analyzes and locates the fault source of the static var compensator rapidly without relying on laboratory detection or fault simulation, and has the advantages of simplified fault analysis, shortened outage time, improved efficiency, reduced cost and wide application range.

Description

technical field [0001] The invention relates to the field of electrical engineering, in particular to a fault analysis and positioning method for a thyristor-controlled reactor of a static var compensator. Background technique [0002] Static var compensator (SVC) has developed into a very mature FACTS device, which is widely used in the generation, transmission and distribution of modern power systems. As one of the most advanced reactive power compensation devices at present, the static synchronous reactive power compensator no longer uses large-capacity capacitors and inductors to generate the required reactive power, but realizes the reactive power through high-frequency switching of power electronic devices. A qualitative leap in reactive power compensation technology, especially suitable for dynamic reactive power compensation in medium and high voltage power systems. As a fast, smooth and controllable dynamic reactive power compensation device without rotating parts,...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/08
Inventor 吴晋波刘海峰李理李振文郭思源洪权蔡昱华李大公刘宇陈宏潘伟
Owner STATE GRID CORP OF CHINA
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