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Breakdown positioning method and system for GIS equipment impulse withstand voltage test

A technology of impact withstand voltage and positioning method, which is applied in the direction of testing dielectric strength, circuit breaker testing, measuring devices, etc., to achieve important scientific research and practical value, and strong practicability

Inactive Publication Date: 2020-03-24
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a breakdown location method and system for GIS equipment shock withstand voltage test, so as to solve the problem that the breakdown location method in the prior art has limitations in field shock withstand voltage test

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  • Breakdown positioning method and system for GIS equipment impulse withstand voltage test
  • Breakdown positioning method and system for GIS equipment impulse withstand voltage test
  • Breakdown positioning method and system for GIS equipment impulse withstand voltage test

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Embodiment 1

[0027] Embodiment 1 of the present invention discloses a breakdown location method used in a GIS equipment shock withstand voltage test. The method is based on the following principles:

[0028] When the GIS equipment is undergoing the on-site impact withstand voltage test and ground flashover occurs, the breakdown current will propagate to both sides of the breakdown point through the shell of the GIS equipment, and a certain shunt will be carried out every time it passes through the ground point of the shell, and the branch current It flows into the grounding network through the grounding flat iron (grounding downconductor), and the magnitude of the grounding branch current is related to the grounding impedance there. Since the tank body of GIS equipment can be regarded as a distributed parameter model of capacitance and conductance, the distance from the breakdown point is different, and the waveform and initial edge of the high-frequency grounding current are also differen...

Embodiment 2

[0044] Embodiment 2 of the present invention discloses a breakdown positioning method used in a GIS equipment shock withstand voltage test. The GIS equipment is a three-phase shared box GIS equipment. The three-phase common box-type GIS equipment has three-phase shared bushing branch busbars, an outlet side isolating switch, a circuit breaker and a busbar side isolating switch.

[0045] Such as figure 2 As shown, the breakdown positioning method for GIS equipment shock withstand voltage test of the second embodiment of the present invention specifically includes the following steps:

[0046] Step S201: setting a high-frequency current sensor for acquiring the waveform of the ground current on the ground bar or the metal support of the components of the GIS equipment.

[0047] This component includes: bushing branch busbar, outlet side isolating switch, circuit breaker and busbar side isolating switch. A high frequency current sensor is provided. By arranging high-frequenc...

Embodiment 3

[0058] Embodiment 3 of the present invention discloses a breakdown positioning method used in a GIS equipment shock withstand voltage test. The GIS equipment is a three-phase sub-box GIS equipment. The three phases of the three-phase sub-box type GIS equipment each use bushing branch busbars, an outlet side isolating switch, a circuit breaker and a busbar side isolating switch.

[0059] Specifically, such as image 3 As shown, the breakdown positioning method for GIS equipment shock withstand voltage test of the third embodiment of the present invention specifically includes the following steps:

[0060] Step S301: setting a high-frequency current sensor for acquiring the waveform of the ground current on the ground bar or the metal support of the components of the GIS equipment.

[0061] The assembly includes: bushing branch busbar, outlet side isolating switch, circuit breaker and busbar side isolating switch, that is, the grounding bar or metal A high-frequency current s...

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Abstract

The embodiment of the invention discloses a breakdown positioning method and system for a GIS equipment impulse withstand voltage test. The breakdown positioning method comprises the following steps:carrying out an impulse withstand voltage test on the GIS equipment under a preset voltage; if the GIS equipment is broken down, obtaining the waveform of the grounding current at an assembly of the GIS equipment, wherein the assembly comprises a sleeve branch bus, an outgoing line side isolation switch, a circuit breaker and a bus side isolation switch; and according to the waveform of the grounding current, determining that the air chamber of the assembly corresponding to the waveform with the highest transient oscillation amplitude and the earliest rising edge is broken down. The embodimentof the invention is used for breakdown fault positioning of the field impulse withstand voltage test of the GIS equipment, can accurately, stably and quickly determine the broken-down air chamber ofthe GIS equipment in the impulse withstand voltage test, is high in practicability, and has very important scientific research and practical values.

Description

technical field [0001] The invention relates to the technical field of GIS equipment, in particular to a breakdown location method and system for a GIS equipment shock withstand voltage test. Background technique [0002] Gas-insulated Meltal-enclosed Switchgear (GIS) has been widely used in substations and power plants of various voltage levels due to its small footprint, convenient maintenance, and low failure rate. In order to ensure safe and reliable operation after being put into operation, the design, material, process, manufacture and cooperation of the main accessories of the equipment are very important. It needs to be assessed during the type test and factory test. However, due to the later transportation, installation and Unpredictable defects will still be introduced during commissioning, which may lead to failures or even accidents after the equipment is put into operation. Therefore, a handover test before putting into operation is essential. In recent years, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R31/327
CPCG01R31/12G01R31/327G01R31/3275
Inventor 倪辉马飞越田禄丁培张庆平魏莹牛勃陈磊李秀广张锐
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
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