Variation Characteristics of State Characteristic Parameters Under Typical Deterioration State of Lightning Arrester
With the advancement of UHV transmission projects in China,the manufacturing technology of metal oxide arrester (MOA )formulations and processes has been greatly improved,and the characteris-tics have been significantly improved,providing more safe and reliable protection for equipment.Howe-ver,the variation characteristics of leakage current and reference voltage caused by MOA deterioration are also diffe-rent.Leakage current and reference voltage are important state characte-ristic parameters of MOA state detection.The change characteristics of parameters directly affect the sensitivity,accuracy,effectiveness and threshold determination of state determination.Based on the MOA state parameter test platform,the change rules of state characteristic parameters of various specifications of samples under different degrees of artificial moisture,accelerated aging under continuous operating voltage,and 2 ms and 8/20 μs current shocks are studied experimentally.The sensitivity and characterization of the change of characteristic parameters are summarized.Based on the test results and the change rule of state characteristic parameters,the suggestion of state determination characteristic quantity is put forward,which provides a reference for the effective detection and accurate evaluation of MOA deterioration state.
万方数据
维普
