Research of Insulator Contamination about Microwave Radiation Characteristic Based on the Theory of Component Emissivity

Author:

Yu Ping1,Rong Chao1

Affiliation:

1. North China Electric Power University

Abstract

Under unfavorable wheather conditions, such as mist, dew and drizzle, contamination flashover may occur on polluted insulators. According to the properties of radiation, this paper proposes a new method for detecting the pollutant on insulators by the dual-channel Dicke radiometer based on the pollutants radiation characteristic and the theory of component emissivity. This study fully considered the effect that the radiation energy of multiple scattering and the external environment on antenna temperature, and it described by the structure of antenna temperature with matrix. A new dual-channel Dicke radiometer has been developed to measure the radiation characteristics of insulators. With a large number of data obtained by experiments, the relationship between ESDD/NSDD and the antenna temperature was researched. And it proposed an empirical formula to calculation ESDD and NSDD. This study provides a new method of detecting insulator contamination by microwave radiometer.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

Reference8 articles.

1. Sun Caixin. Atmospheric environments and external electrical insulations [M]. Beijing, China: China Electric Power Press, (2002).

2. Zhang Zhi-jin,Jiang Xing-liang,SUN Cai-xin. Summary of Research on Flashover Mechanism of Polluted Insulators [J]. Power System Technology, 2008, 16: 37-42.

3. Su Zhiyi, Li Qingfeng. Historical Review and Summary on Measures Against Pollution Flashover Occurred in Power Grids in China [J]. Power System Technology, 2010, v. 34; No. 32512: 124-130.

4. Mei Hongwei, Mao Yingke, Bian Xingming, el al. Effect of relative humidity on the leakage current of insulators[J]. High Voltage Engineering, 2010, 36(3): 627-631.

5. Zhang Bin, Gao Qiang, Yu Ping, Wang Qin; Liu Qianqian; , Research on the Model of ESDD and NSDD Calculating with Horizontal and Vertical Polarization Modes Radiometer, Power and Energy Engineering Conference (APPEEC), 2011 Asia-Pacific , vol., no., pp.1-4, 25-28, March (2011).

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