Operation GIS Equipment Mechanical Vibration Law and Defect Development Trend Analysis

Gas insulated switchgear (GIS) equipment mechanical defects is a key factor threatening the safety of the power grid, and it is important to master the mechanical vibration law of the equipment and the development trend of defects. This paper carries out a tracking study on the 110 kV abnormal mechanical vibration GIS equipment of a substation in Chongqing power grid. First, the vibration detection test was carried out before and after 180 days for different chamber of arrester, disconnector, current transformer and circuit breaker of the abnormal and normal GIS interval respectively. Then, the comparative analysis of vibration law such as harmonic energy and vibration amplitude was carried out for different gas chambers of the same interval, the chamber of same type different intervals and the same chamber at different detection times. Results show that has greater harmonic distortion than normal gas chamber, the abnormal chamber vibration amplitude and waveform distortion increased sharply with the development of time, and even affect the normal chamber mechanical properties. The research content can provide effective reference for the field guidance of GIS equipment mechanical defect maintenance.