Aiming at the frequent faults of 35 kV shunt reactor in interrupting overvoltage in recent years

the few cases of faults are collected and investigated

and the fault phenomena and regularity is analyzed

the failure causes and mechanism is simulated and overvoltage control measures are studied and verified.It is found in the investigation that the switching overvoltage of 35 kV shunt reactor is very serious

remarkable risk is existed at the shunt reactor busbar side when switching no load busbar

and adoption of circuit breaker switching at the side of neutral point of shunt reactor can control the switching overvoltage very well.