Core Points - The State Grid Chongqing Super High Voltage Company successfully completed the replacement, debugging, and testing of the 500 kV GIS circuit breaker at the Yuping Substation, marking the first full-process replacement and maintenance of a 500 kV GIS circuit breaker by the company [1][4] - The Yupu Substation, built in 2015, has a total capacity of 3 million kVA and is a key part of Chongqing's "day-shaped" double-ring backbone grid [2] - The replacement of the GIS circuit breakers is part of a broader initiative to address safety concerns related to the circuit breaker nozzle guide ring, with plans to complete the replacement of 10 groups of GIS circuit breakers by May 2026 [2][4] Company Operations - The installation, maintenance, and debugging of 500 kV GIS equipment require high technical standards and complex processes, which were previously managed by equipment manufacturers [4] - To ensure the successful completion of the GIS circuit breaker replacement, the company prepared in advance by simulating the replacement and installation processes at a dedicated maintenance base [4] - The company plans to summarize the experience gained from this replacement work to systematically complete the remaining nine groups of GIS circuit breakers, thereby eliminating potential hazards and ensuring the healthy operation of the 500 kV substation equipment [4]
国网重庆电力：首次自主更换500千伏GIS断路器 消除重要变电站设备隐患
Zhong Guo Neng Yuan Wang·2025-10-27 08:55