NDLI: Investigations on AC pollution flashover performance of insulator string under different non-uniform pollution conditions

Content Provider	IET Digital Library
Author	Zhang, Zhijin You, Jinwei Wei, Donghong Jiang, Xingliang Zhang, Dongdong Bi, Maoqiang
Abstract	Observations of contamination tests showed that, the contamination distribution of insulators is usually uneven. In this study, the solid layer method was used to imitate different non-uniform pollution conditions and the AC pollution flashover tests of 7-unit insulators were carried out. The results indicate that the increase of uneven pollution degree J from 1 to 15 will give a 39% raise of U 50 under non-uniform pollution on top and bottom surfaces, a 23% decrease for fan-shaped non-uniform pollution and a 21% higher U 50 with ring-shaped non-uniform pollution. A higher occupation ratio (k) of leeward side will reduce U 50 under fan-shaped non-uniform pollution and a bigger radius R of heavy polluted area has certain effect on U 50 for ring-shaped non-uniform pollution. The U 50 and salt deposit density still can be expressed by the negative power function, and non-uniform pollution conditions and J have great effect on a, but less impact on n. The correction equations of different non-uniform pollution conditions are obtained and the relative errors are acceptable. The research has certain reference significance for the design and selection of AC transmission line external insulation.
Starting Page	437
Ending Page	443
Page Count	7
ISSN	17518687
Volume Number	10
e-ISSN	17518695
Issue Number	Issue 2, Feb (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/10/2
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2015.0691
Journal	IET Generation, Transmission & Distribution
Publisher Date	2016-02-04
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC Transmission Line External Insulation Selection Connector Environmental Factors Fan-shaped Nonuniform Pollution Flashover Insulator Insulator Contamination Insulator Contamination Distribution Insulator String AC Pollution Flashover Performance Negative Power Function Power Line Supports Power Transmission Line Ring-shaped Nonuniform Pollution Salt Deposit Density Solid Layer Method
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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