利用双端接地技术测量高压断路器回路电阻方法探讨

Discussion on a Method of Measuring Circuit Resistance of High-Voltage Circuit Breakers with Double-ended Grounding Technology

回路电阻是反映高压断路器的性能和运行状态的一项重要技术指标,传统的测试方法需要打开断路器至少一侧地刀,现场操作需等待调度批复,工作效率极低。根据高压断路器现场测量的实际需求,本文提出了利用双端接地技术测量回路电阻的测试方法与测试方案,同时针对高压断路器的结构特点,对该方法与传统试验方法的测试偏差进行了分析比较,得出利用双端接地技术测量回路电阻的测试方法完全能满足工程实际的需求。

Circuit resistance is an important technical index that reflects the performance and operating status of high-voltage circuit breakers.In traditional testing procedures of circuit resistance,grounding switches at one or both sides of circuit breakers need to be opened before tests via on-site operation,which requires approval from dispatchers and makes the work efficiency extremely low.To meet the actual requirements of field tests of high-voltage circuit breakers,a test method and a test scheme are proposed in this paper to measure circuit resistance with double-ended grounding technology.Based on the structural characteristics of high-voltage circuit breakers,the test deviation between the proposed method and the traditional method is analyzed and compared.It is concluded that the proposed method can fully meet the actual needs of projects.