Adaptive overcurrent protection scheme coordination in presence of distributed generation using radial basis neural network

Protection and Control of Modern Power Systems

Table 2 Sequence of Relay Operation of feeder 2 with conventional overcurrent protection scheme

Faulted Bus 33 without DG						Faulted Bus 33 with DG penetration
Relay	Time dial	Pickup tap	Short circuit current (kA)	Time operation (ms)	Operation area	Short circuit current (kA)	Time operation (ms)	Operation area
OR 32	0.07	2.400	0.823	198	Feeder 2	1.159	18	Maloperation
OR 31	0.10	2.450	0.795	430	Feeder 2	1.132	29	Maloperation
OR 30	0.13	2.460	0.755	757	Feeder 2	1.095	44.4	Maloperation
OR 29	0.18	2.470	0.624	1405	Feeder 2	0.825	69.5	Maloperation
OR 28	0.19	2.480	0.596	2532	Feeder 2	0.804	117	Maloperation
OR 27	0.28	2.490	0.585	4421	Feeder 2	0.796	185	Maloperation
OR 26	0.5	2.500	0.575	6536	Feeder 2	0.790	351	Maloperation
OR 25	0.68	2.520	0.566	10,091	Feeder 2	0.784	579	Maloperation