Detection of Transient Overvoltage and Analysis of Insulation State of Power Equipment

With the increase of transmission voltage level and long-distance transmission lines, transient overvoltages threaten the insulation safety of power system substation equipment. Aiming at the problem of transient overvoltage, system substation equipment and the importance of establishing transient overvoltage response monitoring are proposed. The equipment is combined with the comprehensive analysis and calculation of the relationship between the insulation coordination of electrical equipment and the insulation state of the equipment by using a predictive analysis method for the insulation safety of power Through transient overvoltage test, online analysis of the insulation working condition of substation equipment, locking the time zone and fault point where insulation accidents may occur is possible, and the insulation safety status of substation equipment can be predicted. It is beneficial to put forward the basis for preventive protection and predictive maintenance of substation equipment.