摘要
高压SF_6断路器弧触头严重烧蚀,可能会造成开断短路电流失败事故。因此,及时检测出弧触头烧蚀情况并进行修复或更换,显得尤为重要。首先,通过弧触头大电流烧蚀实验,发现弧触头动态接触电阻的分布具有一定的随机性,分闸动态接触电阻更适合SF_6断路器弧触头烧蚀状态的评估。其次,基于BP神经网络,建立高压SF_6断路器弧触头烧蚀状态程度评估模型,用于高压SF6断路器弧触头烧蚀程度的评估和预测。最后,对样本数据进行评估,验证所提方法的有效性。
The breaking fault of HV SF 6 circuit breaker is frequently caused by heavy arc contact erosion. Thus, it is very important to detect the erosion status of arcing contact and make the replacement decision. According to the results of arc erosion experiment by employing a large current, it is found that the values of dynamic contact resistance have a certain level of randomness and the dynamic contact resistance with the switch closed is more suitable to evaluate the erosion state of arc contact. On this basis, an evaluation model of erosion status for arc contacts in SF 6 circuit breakers is established based on BP neural networks. The proposed method can be utilized to assess and predict the erosion status of arc contacts in HV SF 6 circuit breakers. To the end, an example is included to verify the effectiveness of evaluation method.
作者
刘北阳
李志兵
刘春
臧春艳
傅中
杨景刚
刘媛
LIU Bei-yang;LI Zhi-bing;LIU Chun;ZANG Chun-yan;FU Zhong;YANG Jing-gang;LIU Yuan(China Electric Power Research Institute, Beijing 100192, China;State Key Laboratory of Advanced Electromagnetic Engineeringand Technology, Huazhong University of Science and Technology, Wuhan 430074, China;State Grid JiangsuElectric Power Company, Nanjing 210024, China)
出处
《电力科学与技术学报》
CAS
北大核心
2019年第1期74-79,共6页
Journal of Electric Power Science And Technology
基金
国家电网公司科技项目(GYB17201600068)
关键词
弧触头
触头烧蚀
动态接触电阻
状态评估
arc contact
contact erosion
dynamic contact resistor
status assessment
作者简介
通信作者:刘春(1971-),男,博士,副教授,主要从事智能电器、电器在线检测与监测技术、气体放电及其应用等研究;E-mail:tslc@hust.edu.cn.
