CAJ | 학술논문

某水电站GIS出现一次接地刀闸非全相动作导致其中两相接地状态合闸，引起相关GIS设备损坏，母线停运；一次接地刀闸合闸状态无法分开，导致电气一次高压试验无法进行。另一水电站安装相同GIS装置，也出现一次由于操作机构非全相操作导致的单相接地故障。通过拆开故障设备，研究故障的放电现象，找出故障原因，并就GIS类似结构的隔离刀闸和接地刀闸操作机构故障隐患提出改造意见，以确保GIS设备安全稳定运行。
모수전참GIS출현일차접지도갑비전상동작도치기중량상접지상태합갑，인기상관GIS설비손배，모선정운；일차접지도갑합갑상태무법분개，도치전기일차고압시험무법진행。령일수전참안장상동GIS장치，야출현일차유우조작궤구비전상조작도치적단상접지고장。통과탁개고장설비，연구고장적방전현상，조출고장원인，병취GIS유사결구적격리도갑화접지도갑조작궤구고장은환제출개조의견，이학보GIS설비안전은정운행。
In the operation of a hydropower station , an open-phase action of the grounding switch leads to the closing of two phases in grounding state , which causes the damage of the gas insulated substation ( GIS) equipment and the shut-down of the busbar .In another fault , the grounding switch cannot be opened , which makes the high voltage electric test unable to carry out .In another hydropower station equipped with the same GIS equipment , a single phase grounding fault due to the open-phase action of the operation mechanism is also observed .Possible reasons of such faults are ana-lyzed by disassembling the faulty equipment .Renovation recommendations are then proposed on the operation mecha-nism of similar isolating switches and grounding switches , which could ensure the stable and safe operation of the GIS e-quipment .