Assessment of Global Voltage Stability Margin through Radial Basis Function Neural Network

Table 3

GVSM for IEEE 30-bus test system at unknown different operating loading incorporating noise.

Value of GVSM for unknown loading at normal case
	NR	FFBP	CFB	GR	LR	NARX	RBFN	ELMAN	FFDTD
Operating load; 1.1628	1.9862	1.9593	2.0219	1.9742	0.7938	1.4445	1.9849	0.4502	1.7873
Operating load; 1.2118	1.8617	1.9432	2.0203	1.8625	0.8713	1.4237	1.8611	0.4794	1.7916
Operating load; 1.5122	1.4953	1.7104	1.9924	1.4959	1.5513	1.2909	1.4951	0.587	1.8094
Operating load; 1.8112	1.2351	1.3424	1.8337	1.2351	1.9035	1.1392	1.235	1.6006	1.8063
Operating load; 2.5122	0.5201	0.6106	0.2401	0.52	1.9453	0.6958	0.5203	1.9932	1.7387
Value of GVSM for unknown loading at signal-to-noise ratio 0.5 db
	NR	FFBP	CFB	GR	LR	NARX	RBFN	ELMAN	FFDTD
Operating load; 1.1628	1.9862	1.9654	2.0249	1.9539	0.6874	1.4587	1.981	0.3749	1.7461
Operating load; 1.2118	1.8617	1.834	2.0215	1.8579	0.3972	1.6843	1.8588	0.4354	1.7279
Operating load; 1.5122	1.4953	1.4669	1.9649	1.4901	1.7619	1.0475	1.4886	0.6187	1.7252
Operating load; 1.8112	1.2351	1.7676	1.9424	1.2286	1.3787	0.6792	1.2257	1.3806	1.8446
Operating load; 2.5122	0.5201	0.7542	0.2733	0.5224	1.9419	0.7901	0.5137	1.9909	1.8075
Value of GVSM for unknown loading at signal-to-noise ratio 0.05 db
	NR	FFBP	CFB	GR	LR	NARX	RBFN	ELMAN	FFDTD
Operating load; 1.1628	1.9862	2.0004	2.0038	1.9539	0.6863	1.7635	1.9788	0.4354	1.6397
Operating load; 1.2118	1.8617	2.0035	2.0231	1.8682	0.3445	1.5947	1.8557	0.5822	1.8311
Operating load; 1.5122	1.4953	1.8995	1.9757	1.4905	0.8095	1.0957	1.4789	1.6404	1.8227
Operating load; 1.8112	1.2351	0.7702	1.7993	1.2248	1.8876	0.8717	1.2122	1.0576	1.8252
Operating load; 2.5122	0.5201	0.8744	0.2835	0.5355	1.7867	0.4752	0.512	1.9095	1.6913