Diagnostic method and detecting system for GIS partial discharge

A technology of partial discharge and combined electrical appliances, applied in the direction of testing dielectric strength, etc., can solve problems such as national economic losses, achieve the effects of avoiding economic losses, realizing automatic detection, and ensuring safe and reliable operation

Active Publication Date: 2014-01-29
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Insulation defects are the main fault problem of GIS. Since GIS is widely used in important power supply systems, if insulation defects occur in GIS, it will cause huge losses to the national economy.

Method used

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  • Diagnostic method and detecting system for GIS partial discharge
  • Diagnostic method and detecting system for GIS partial discharge
  • Diagnostic method and detecting system for GIS partial discharge

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Embodiment Construction

[0037] As mentioned in the background technology section, how to timely detect the type of partial discharge in GIS is an urgent problem to be solved in GIS maintenance.

[0038] At present, the main method for diagnosing partial discharge in power systems is the Electric Power Industry Standard of the People's Republic of China DL / T417-2006 - "Guidelines for On-site Detection of Partial Discharge of Power Equipment". This standard gives a typical partial discharge spectrum, including the relationship between the discharge response waveform and the discharge vector and the test voltage.

[0039] However, the existing diagnostic methods are based on the measurement results and are manually judged, which requires high professional ability of the staff, and the detection rate is relatively slow.

[0040] The inventors found that when partial discharge occurs in GIS, a large number of electromagnetic pulse signals will be generated. In the same working cycle, the discharge times, ...

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Abstract

The invention discloses a diagnostic method and detecting system for GIS partial discharge. The diagnostic method comprises the following steps: a database containing standard grey-scale maps of various partial discharge types is established; the number of discharge times, discharge amplitude and discharge phase angles of the partial discharge within a set work cycle of a GIS to be detected are acquired; a grey-scale map to be identified of the partial discharge of the GIS to be detected is formed according to the number of discharge times, the discharge amplitude and the discharge phase angles; the grey-scale map to be identified is contrasted with the standard grey-scale maps in the database to judge the type of the partial discharge. The diagnostic method can be used for quickly detecting the type of the GIS partial discharge. The detecting system adopting the principle of the diagnostic method can realize automatic detection of the GIS partial discharge, and therefore the GIS partial discharge can be found out in time and the type of the GIS partial discharge can be judged.

Description

technical field [0001] The invention relates to the technical field of electric device maintenance, and more specifically, relates to a diagnosis method and a detection system for partial discharge of combined electrical appliances. Background technique [0002] This section is intended to provide a background or context for implementations of the invention that are recited in the claims. The descriptions herein may include concepts that could be explored, but not necessarily concepts that have been previously thought of or explored. Therefore, unless otherwise indicated herein, what is described in this section is not prior art to the description and claims in this application and is not admitted to be prior art by inclusion in this section. [0003] Gas Insulated Switchgear (GIS for short) is a kind of circuit breaker, isolating switch, current transformer, lightning arrester and connecting busbar, etc., which are all packaged in a grounded metal shell, and the shell is f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 徐华刘浩军刘岩潘杰陈晓锦闫东卢洪坤李思南邵先军曹俊平于淼
Owner STATE GRID CORP OF CHINA
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