高电压技术2011，Vol.37Issue(11)：2649-2654,6.
Radiated Electromagnetic Field Signature of Cracked and Polluted Porcelain Insulators
Radiated Electromagnetic Field Signature of Cracked and Polluted Porcelain Insulators
Ehsan Azordegan 1David R Swatek 2Behzad Kordi1
作者信息
- 1. Department of Electrical and Computer Engineering, University of Manitoba, Winnipeg, MB, Canada
- 2. Insulation Engineering and Testing Department, Manitoba Hydro, Winnipeg, MB, Canada
- 折叠
摘要
Abstract
Porcelain cap and pin insulators are by far the most popular suspension insulators in high voltage （HV） dis- tribution networks all around the world. Inspection and condition monitoring of HV insulators is also very important to the utility companies because of the critical and vital role that they play in distribution systems. In terms of safety, practicality and ease of use, remote detection methods are more popular among the line technicians. A new remote condition assessment method based on electromagnetic radiations from porcelain insulators is presented in this gaper. In a lab environment, a string of two porcelain insulators is energized by a 45 kV transformer. Electromagnetic radia- tions due tO the partial＂discharge activities inside the porcelain insulator are captured by passive sensors and antennas. Two cases of defective insulators on a two insulator string are studied here. The first case focuses on the effect of con- taminated porcelain shells on radiation signature of partial discharges. A polluted porcelain shell with ESDD level of 0.03 mg/cmz was first tested. The second case studies the effect of cracks of an intentionally-cracked porcelain shell. The cracked insulator is also tested on a two insulator string. To compare the partial discharge radiation signature of different faulty insulators, phase resolved graphs were developed. The electromagnetic radiated signature of a polluted insulator and a cracked insulator was＇calculated and compared using phase resolved graphs.关键词
partial discharge/electromagnetic radiation/contamination/high voltage/porcelain insulator/condition assessment/phase resolved graphKey words
partial discharge/electromagnetic radiation/contamination/high voltage/porcelain insulator/condition assessment/phase resolved graph分类
信息技术与安全科学引用本文复制引用
Ehsan Azordegan,David R Swatek,Behzad Kordi..Radiated Electromagnetic Field Signature of Cracked and Polluted Porcelain Insulators[J].高电压技术,2011,37(11):2649-2654,6.
