An Effective Method to Determine the Available Transmission Capacity with Variable Frequency Transformer

Table 2

Load flow calculation for all methods over IEEE 39-bus system.

Bus name	L-L. (kV)	V, mag. (kV)	V, mag. (p.u)	V, angle deg	Line name	Loading (%)
Bus 01	345	361.3379	1.047356	−8.438685	Line 01−02	21.04781
Bus 02	345	361.814	1.048736	−5.753762	Line 01–39	26.3778
Bus 03	345	355.4096	1.030173	−8.598549	Line 02−03	61.10635
Bus 04	345	346.3326	1.003863	−9.606668	Line 02–25	41.25247
Bus 05	345	346.8322	1.005311	−8.611863	Line 03−04	26.43798
Bus 06	345	347.647	1.007672	−7.949683	Line 03–18	8.748926
Bus 07	345	343.9654	0.9970012	−10.12382	Line 04−05	22.8787
Bus 08	345	343.6269	0.9960199	−10.61538	Line 04–14	45.75156
Bus 09	345	354.738	1.028226	−10.32199	Line 05−06	76.21613
Bus 10	345	350.917	1.017151	−5.427126	Line 05–08	54.17676
Bus 11	345	349.3793	1.012694	−6.284262	Line 06−07	71.88248
Bus 12	138	138.0209	1.000151	−6.243642	Line 06–11	60.66505
Bus 13	345	349.9359	1.014307	−6.097718	Line 07−08	31.21089
Bus 14	345	349.048	1.011733	−7.656411	Line 08−09	18.11237
Bus 15	345	350.3073	1.015384	−7.736092	Line 09–39	11.83627
Bus 16	345	355.962	1.031774	−6.187509	Line 10−11	61.43435
Bus 17	345	356.5766	1.033555	−7.301286	Line 10–13	47.45456
Bus 18	345	355.6713	1.030931	−8.223858	Line 13−14	45.68793
Bus 19	345	362.202	1.049861	−1.022768	Line 14−15	6.043283
Bus 20	230	227.9706	0.9911765	−2.014676	Line 15−16	57.59912
Bus 21	345	355.9574	1.03176	−3.780534	Line 16−17	37.97528
Bus 22	345	362.1793	1.049795	0.6683056	Line 16–19	81.90312
Bus 23	345	360.4521	1.044789	0.4700278	Line 16–21	53.76161
Bus 24	345	357.8723	1.037311	−6.067907	Line 16–24	17.37334
Bus 25	345	364.8608	1.057568	−4.363392	Line 17−18	34.30695
Bus 26	345	362.966	1.052075	−5.526725	Line 17–27	7.699145
Bus 27	345	358.0207	1.037741	−7.495423	Line 21−22	99.08445
Bus 28	345	362.2922	1.050122	−2.014886	Line 22−23	12.04065
Bus 29	345	362.2301	1.049942	0.7443553	Line 23−24	56.67618
Bus 30	16.5	17.28375	1.0475	−3.333993	Line 25−26	12.8422
Bus 31	16.5	16.203	0.982	0	Line 26−27	44.40484
Bus 32	16.5	16.22115	0.9831	2.56896	Line 26–28	24.25713
Bus 33	16.5	16.4538	0.9972	4.194689	Line 26−29	32.43954
Bus 34	16.5	16.70295	1.0123	3.174992	Line 28−29	55.99728
Bus 35	16.5	17.31345	1.0493	5.630054
Bus 36	16.5	17.54775	1.0635	8.322918
Bus 37	16.5	16.9587	1.0278	2.421107
Bus 38	16.5	16.93725	1.0265	7.807727
Bus 39	345	355.35	1.03	−10.05296