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RC serial connection-based very fast transient overvoltage suppression method

A transient overvoltage and fast technology, applied in emergency protection circuit devices, electrical components, circuit devices, etc. for limiting overcurrent/overvoltage, can solve problems such as poor suppression effect and large active power loss, and achieve peak reduction , The effect of low active loss

Active Publication Date: 2017-11-21
SHANDONG ELECTRIC POWER ENG CONSULTING INST CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the parallel RC suppression VFTO has problems such as poor suppression effect and large active power loss.

Method used

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  • RC serial connection-based very fast transient overvoltage suppression method
  • RC serial connection-based very fast transient overvoltage suppression method
  • RC serial connection-based very fast transient overvoltage suppression method

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0046]It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combination...

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Abstract

The invention discloses an RC serial connection-based very fast transient overvoltage suppression method. A to-be-controlled circuit is subjected to simulation to determine circuit peak values in a transformer, an isolation switch and a bus when a circuit transformer end, an isolation switch end and a transformer side isolation switch end are connected with a series RC branch respectively; a suppression circuit connecting position is selected according to suppression requirement; and in the chosen position, simulation of the suppression effects of the RC series branch with different values is performed so as to determine the optimal suppression effect range to be used as the capacitance value and the resistance of the RC. By virtue of the suppression method, it is ensured that the peak value of the VFTO (very fast transient overvoltage) can be effectively lowered, and compared with the conventional parallel RC branch suppression method, the suppression method disclosed in the invention is lower in power consumption; and the effectiveness of the method is verified through simulation.

Description

technical field [0001] The invention relates to a fast transient overvoltage suppression method based on RC series connection. Background technique [0002] The opening and closing operations of disconnectors and circuit breakers in GIS and the discharge of live lines to ground will generate Very Fast Transient Overvoltage (VFTO for short). VFTO will cause harm to the internal insulation of GIS, which will significantly reduce the flashover voltage on the surface of the insulator and accelerate the aging of the insulation. At the same time, VFTO will cause damage to the insulation of the external electrical equipment of the GIS device. The VFTO transmitted to the external electrical equipment will affect the power transformer, voltage transformer, detection and detection equipment connected to the line, and the coupling between VFTO and the shell will cause transient ground potential. rise and case transient potential rise. [0003] At present, there are some suppression m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
CPCH02H9/04
Inventor 卢静王宇许卫东尹晓东朱月涌樊潇魏华栋赵臻德李绍生裴善鹏娄杰
Owner SHANDONG ELECTRIC POWER ENG CONSULTING INST CORP
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