Wang Zhixiang, Jones Gordon R, Spencer Joseph W, Wang Xiaohua, Rong Mingzhe
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.
Department of Electrical Engineering & Electronics, University of Liverpool, Brownlow Hill, Liverpool L69 3GJ, UK.
Sensors (Basel). 2017 Mar 6;17(3):519. doi: 10.3390/s17030519.
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.
触头侵蚀是影响高压断路器（HVCB）电气使用寿命的最关键因素之一。为了基于状态的维护以确保HVCB的功能运行，对触头侵蚀程度进行在线监测的需求日益增加。基于一台商业245 kV/40 kA六氟化硫（SF₆）充气式断路器设计了一种光谱监测系统，该断路器在大气压力的SF₆环境中采用铜钨（28 wt%和72 wt%）电弧触头。使用三个基于光纤的传感器来捕获电弧的时间分辨光谱。提出了一种使用色度法处理时间分辨光谱信号的新方法。对处理后的色度参数进行了解释，结果表明触头材料和灭弧气体的光谱发射随时间的变化与插头电弧触头的质量损失和表面退化密切相关。这表明了将该方法应用于触头侵蚀在线监测的可行性。
