NDLI: AC flashover characteristics of insulators under haze

Content Provider	IET Digital Library
Author	Guo, Yujun Jiang, Xingliang Liu, Yang Meng, Zhigao Li, Zhenyu
Abstract	The occurrence of large-scale haze–fog weather in some developing countries brings a new threat to the safe operation of outdoor insulation. In order to study the effect of the haze–fog on the flashover performance of insulators and the flashover mechanism, kieselguhr, calcium sulphate (CaSO 4) and ammonium sulphate ((NH4)2SO4) in different particle sizes were mixed with ultrasonic fog to simulate the haze–fog environment and quantitative ac flashover experiments on the standard suspension porcelain insulator were carried out. The test results indicate that the flashover voltage is related with the pollution degree, particle component, particle size and fog-water conductivity, and may decrease by more than 20% under haze–fog environment. The effect of salt aerosols on flashover voltage is determined by the solubility and larger than that of non-soluble mineral aerosols or organic carbon aerosols. The flashover voltage increases with the increase of the particle size, but decreases with the increase of fog-water conductivity. The flashover of insulator under haze–fog condition is a special kind of pollution flashover in essence.
Starting Page	3563
Ending Page	3569
Page Count	7
ISSN	17518687
Volume Number	10
e-ISSN	17518695
Issue Number	Issue 14, Nov (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/10/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2016.0284
Journal	IET Generation, Transmission & Distribution
Publisher Date	2016-11-04
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC Flashover Characteristic Aerosols Ammonium Sulphate Calcium Sulphate Connector Flashover Flashover Mechanism Flashover Performance Flashover Voltage Fog Fog-water Conductivity Haze-fog Environment Haze–fog Weather Insulator Kieselguhr Mineral Aerosols Organic Carbon Aerosols Outdoor Insulation Particle Component Particle Size Particle Sizes Pollution Flashover Porcelain Insulator Power Line Supports Solubility Standard Suspension Porcelain Insulator
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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