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- Title
Study on Insulator Flashover Voltage Gradient Correction Considering Soluble Pollution Constituents.
- Authors
Dongdong Zhang; Zhijin Zhang; Xingliang Jiang; Zhongyi Yang; Jiayao Zhao; Yongfu Li
- 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, NaNO3, KNO3, NH4NO3, MgSO4, Ca(NO3)2 and CaSO4), 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 CaSO4. 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.
- Subjects
ELECTRIC potential; SALT deposits; NONMETALLIC minerals; SALINES (Landforms); SALT flats
- Publication
Energies (19961073), 2016, Vol 9, Issue 11, p954
- ISSN
1996-1073
- Publication type
Article
- DOI
10.3390/en9110954