基于谐振原理由电容器组供电的电缆局部放电振荡波检测与定位技术  

Damped AC technique based on resonant principle and supplied by capacitor banks for partial discharge detection and location in power cables

作　　者：赵学风 蒲路 段玮 琚泽立 李洪杰[2] ZHAO Xuefeng;PU Lu;DUAN Wei;JU Zel;LI Hongjie(Research Institute of State Grid Shanxi Electric Power Company, Xi'an 710100, China;Xi'an Jiaotong University, Xi'an 710049, China)

机构地区：[1]国网陕西省电力公司电力科学研究院,陕西西安710100 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《电气应用》2019年第6期28-35,共8页Electrotechnical Application

基　　金：陕西省2018年重点研发计划(2018GY-001)

摘　　要：局部放电作为反映交联聚乙烯电缆绝缘状态的重要参数,其检测能够发现电缆绝缘的早期缺陷,具有十分重要的意义。提出一种通过在传统调频式串联谐振原理上添加两个双向电力电子开关的拓扑,能够产生振荡波电压测量电缆局部放电。为减小系统在工作时从电网吸收峰值较高的瞬时电流,利用电容器组对基于调频式串联谐振的振荡波检测技术供电。通过参数评估与Simulink仿真设计了基于提出技术的测试系统,并在实验室无局部放电电容和含有人造缺陷的电缆上进行试验,试验结果验证了所提技术的有效性。It is essential to detect partial discharge to ensure the integrity of the cable insulation. A technique to generate damped AC voltage using traditional frequency-tuned resonant system and additional bi-directional solid-state switches is proposed. To reduce the transient high current absorb from the networks, capacitor banks are adopted to supply the system. Parameter estimation and simulation by Simulink are conducted to evaluate the manufacturing process of the system. Laboratory tests show the validity and effectiveness of the proposed technique.

关 键 词：电力电缆 串联谐振 振荡波 电容器组 局部放电 

分 类 号：TM855[电气工程—高电压与绝缘技术]