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

Table 4

GVSM for IEEE 118-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; 1.249	5.1187	5.0112	−1.762	5.133	−6.4245	−1.9971	5.118	0.2715	−8.6754
Operating load; 1.478	4.0734	4.541	−3.1588	4.1287	−8.4655	−7.3933	4.0729	0.1209	−8.5274
Operating load; 1.5671	3.5154	3.6765	−5.303	3.5939	−8.7183	−8.2413	3.515	1.0685	−8.4834
Operating load; 1.6591	2.9059	1.8745	−7.2875	3.05	−7.5549	−8.6219	2.9041	1.3871	−8.4485
Operating load; 1.8751	−4.6571	−3.8761	−10.1198	−3.4453	−3.2183	−8.8976	−4.6565	1.4657	−8.3791
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; 1.249	5.1187	5.0187	0.2122	5.1415	−10.8296	−5.02	5.105	−1.3566	−8.456
Operating load; 1.478	4.0734	5.2299	−9.4885	4.1286	−8.0771	−8.7955	4.0235	−6.1076	−8.1775
Operating load; 1.5671	3.5154	5.0041	−8.5883	3.6213	−5.2684	−7.7728	3.505	2.8002	−7.9819
Operating load; 1.6591	2.9059	3.7894	−7.4151	3.05	−1.8476	−7.779	2.8051	0.7538	−8.2134
Operating load; 1.8751	−4.6571	−5.0553	−8.5239	−3.4719	−6.0628	−8.9145	−4.637	−0.1573	−8.5286
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; 1.249	5.1187	5.2705	−0.3736	5.133	−10.638	−5.9343	5.0081	1.2566	−8.2898
Operating load; 1.478	4.0734	5.2223	−2.7077	4.1287	−2.5001	−5.5532	4.0101	−1.3369	−7.759
Operating load; 1.5671	3.5154	3.436	1.4016	3.5934	−6.853	−8.663	1.5013	3.5063	−8.4106
Operating load; 1.6591	2.9059	1.9993	−7.9334	3.0947	−4.1361	−8.425	2.2041	2.643	−8.0591
Operating load; 1.8751	−4.6571	−3.9595	−10.7149	−3.4397	−7.2241	−8.8729	−4.3073	1.4507	−8.4814