A Novel Automatic Generation Control Method Based on the Ecological Population Cooperative Control for the Islanded Smart Grid

Table 3

Frequency index assessment under impulsive load disturbance and white noise load disturbance.

Type of disturbances	Algorithms	Frequency index
		Average value (Hz)	Maximum value (Hz)	Standard deviation (Hz)	Qualification rate (100%)
Impulsive load disturbance	EPCC	0.0341	0.6147	0.0058	94.24
	PDWoLF-PHC()	0.0476	0.6145	0.0030	89.72
	WPH	0.0512	0.6677	0.0015	89.43
	DWoLF-PHC()	0.0521	0.6573	0.0020	89.14
	Q()	0.0733	0.6973	0.0375	86.71
	Q	0.1439	1.9009	0.0272	83.15
White noise load disturbance	EPCC	0.0042	0.3736	0.0006	99.96
	PDWoLF-PHC()	0.0047	0.4140	0.0029	99.94
	WPH	0.0055	0.4144	0.0046	99.91
	DWoLF-PHC()	0.0074	0.4728	0.0029	99.81
	Q()	0.0091	0.6193	0.0032	99.48
	Q	1.6531	91.1911	1.2365	99.32