A kind of pollution test method of DC surge arrester

Abstract

The invention provides a pollution test method for a direct current lightning arrester. The method comprises the following steps of: flushing the direct current lightning arrester, and coating pollution liquid on the direct current lightning arrester; after a pollution layer is dried, applying continuous running voltage to the direct current lightning arrester, and starting a fog generator; continuously applying the continuous running voltage to the direct current lightning arrester until risk of external flashover and internal thermal collapse are eliminated; performing cyclic treatment on the direct current lightning arrester according to the steps 1, 2, and 3; and evaluating the pollution test. By the method, an actual running situation of the direct current lightning arrester can be simulated, and the method is feasible; moreover, the thermal stability of the direct current lightning arrester can be accurately judged; the anti-pollution capacity of the direct current lightning arrester can be comprehensively and accurately checked; and the test method is simple and reliable and is easy to execute.

Description

technical field [0001] The invention relates to a pollution test method, in particular to a pollution test method of a DC arrester. Background technique [0002] At present, there is no recognized and reasonable artificial pollution test method for DC arresters at home and abroad, which cannot reliably evaluate the pollution resistance of DC arresters, which affects the safe and stable operation of DC systems. [0003] The artificial pollution test method for AC surge arresters stipulated in Appendix O of the national standard GB11032-2010 "AC Gapless Metal Oxide Surge Arresters" is only applicable to AC porcelain jacket arresters, and there is some controversy. This test method has the following disadvantages: [0004] 1. At present, the pollution test of insulators and other equipment in China mostly adopts the method of "brushing" to apply dirty liquid, and the method of "spraying" to apply dirty liquid has not been widely promoted in China; for surge arresters with high...

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Problems solved by technology

[0004] 1. At present, the pollution test of insulators and other equipment in China mostly adopts the method of "brushing" to apply dirty liquid, and the method of "spraying" to apply dirty liquid has not been widely promoted in China; for surge arresters with high voltage levels such as AC 1000kV, even if " The "spraying" method is also difficult to complete the application of the dirty liquid in a short time, resulting in part of the dirty liquid being dried when the voltage is applied;

[0005] 2. In the later stage of the test, the dirt on the surface of the arrester jacket has dried, and the ability to assess the outer insulation of the arrester has weakened;

[0006] 3. When pollution accidents actually occur in the power system, the surface dirt layer is generally wetted gradually under the condition of electrification; the current test method is to wet the dirt layer first, and then apply voltage, which is inconsistent with the actual situation

[0007] GB / T22707-2008 "Artificial Pollution Test of High-Voltage Insulators for DC System" stipulates the artificial pollution test method of DC system insulators, but since the insulator does not have internal components, this method only assesses the external pollution resistance of the insulator

The artificial pollution test method of insulators cannot assess the internal thermal stability of arresters

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