Table 9.

Peak value of switching overvoltage across circuit breaker S1 in star topology.

Mitigation method	TRV (kV)
	Phase A	Phase B	Phase C
Without mitigation	17.352	39.725	48.186
With PIR	5.583	18.952	23.394
With R–C	14.913	29.883	34.816
With choke coil R–L	4.309	14.921	18.439
With surge capacitor	16.135	34.132	40.941