Study on Insulator Flashover Voltage Gradient Correction Considering Soluble Pollution Constituents

Dongdong Zhang, Zhijin Zhang, Xingliang Jiang, Zhongyi Yang, Jiayao Zhao and Yongfu Li
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Dongdong Zhang: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Shapingba District, Chongqing 400044, China
Zhijin Zhang: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Shapingba District, Chongqing 400044, China
Xingliang Jiang: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Shapingba District, Chongqing 400044, China
Zhongyi Yang: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Shapingba District, Chongqing 400044, China
Jiayao Zhao: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Shapingba District, Chongqing 400044, China
Yongfu Li: State Grid Chongqing Electric Power Co. Electric Power Research Institute, Yubei District, Chongqing 401121, China

Energies, 2016, vol. 9, issue 11, 1-14

Abstract: Natural polluted insulator surfaces are always coated with various kinds of soluble constituents, and those constituents affect flashover performance differentially. Currently, this fact is not considered either in laboratory experiments or field pollution degree measurements, causing the existing insulation selection method to be deficient. In this paper, a systematic study on insulator flashover voltage gradient correction involving different types of soluble pollution constituents is presented. Using a typical type glass insulator as the sample, its flashover tests, polluted by typical soluble chemicals (NaCl, NaNO 3 , KNO 3 , NH 4 NO 3 , MgSO 4 , Ca(NO 3 ) 2 and CaSO 4 ), were carried out. Then, the flashover gradient correction was made by combining the flashover performance of each soluble constituent, the equivalent salt deposit density ( ESDD ) contribution of the seven constituents, and the saturation performance of CaSO 4 . The correction agreed with the flashover test results of insulator polluted by three types of soluble mixture. Research results indicate that the flashover gradient correction method proposed in this paper performs well in reducing the calculating error. It is recommended to carry out component measurements and flashover gradient correction to better select outdoor insulation configuration.

Keywords: insulator; pollution flashover; equivalent salt deposit density ( ESDD ); soluble constituent; flashover voltage gradient (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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