title: Spectroscopic On-Line Monitoring of Cu/W Contacts Erosion in HVCBs Using Optical-Fibre Based Sensor and Chromatic Methodology.
abstract: Contact erosion is one of the most crucial factors affecting the electrical service lifetime of high-voltage circuit breakers (HVCBs). On-line monitoring the contacts' erosion degree is increasingly in demand for the sake of condition based maintenance to guarantee the functional operation of HVCBs. A spectroscopic monitoring system has been designed based upon a commercial 245 kV/40 kA S F 6 live tank circuit breaker with copper-tungsten (28 wt % and 72 wt %) arcing contacts at atmospheric S F 6 pressure. Three optical-fibre based sensors are used to capture the time-resolved spectra of arcs. A novel approach using chromatic methods to process the time-resolved spectral signal has been proposed. The processed chromatic parameters have been interpreted to show that the time variation of spectral emission from the contact material and quenching gas are closely correlated to the mass loss and surface degradation of the plug arcing contact. The feasibility of applying this method to online monitoring of contact erosion is indicated.
authors.affiliation: State Key Laboratory of Electrical Insulation for Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, 28 Xianning West Rd, Xi'an 710049, China. wangzhixiang.215@gmail.com.|Department of Electrical Engineering & Electronics, University of Liverpool, Brownlow Hill, Liverpool L69 3GJ, UK. wangzhixiang.215@gmail.com.
authors.forename: Zhixiang
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Electrical Engineering & Electronics, University of Liverpool, Brownlow Hill, Liverpool L69 3GJ, UK. grjones@liv.ac.uk.
authors.forename: Gordon R
authors.initials: GR
authors.lastname: Jones
authors.affiliation: Department of Electrical Engineering & Electronics, University of Liverpool, Brownlow Hill, Liverpool L69 3GJ, UK. joe@liv.ac.uk.
authors.forename: Joseph W
authors.initials: JW
authors.lastname: Spencer
authors.affiliation: State Key Laboratory of Electrical Insulation for Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, 28 Xianning West Rd, Xi'an 710049, China. xhw@mail.xjtu.edu.cn.
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Electrical Insulation for Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, 28 Xianning West Rd, Xi'an 710049, China. mzrong@mail.xjtu.edu.cn.
authors.forename: Mingzhe
authors.initials: M
authors.lastname: Rong
keywords: chromatic methodology; contacts erosion; high-voltage circuit breaker (HVCB); online monitoring; optical-fibre based sensor; spectroscopic