Table 5.

Peak value of switching overvoltage across circuit breaker S1 in single sided ring topology.

Mitigation method	TRV (kV)
	Phase A	Phase B	Phase C
Without mitigation	16.021	34.272	39.452
With PIR	3237	12,800	15,700
With R–C	14.700	29.216	32.775
With choke coil R–L	2.440	9.238	11.616
With surge capacitor	15.260	31.500	34.835