*5.1. IEEE*−*13 Bus URDN*

5.1.1. Fundamental Power Flow Solution for Accuracy Test

The proposed three-phase FPFA is examined on IEEE−13 bus unbalanced test feeder without interfacing of D-STATCOM device. Figure 7 shows the IEEE−13 bus feeder and its data is collected from [31]. 5000 kVA and 4.16 kV are the chosen base values for this network. The FPFA is taken 5 iterations for its convergence with tolerance for convergence is 10−<sup>4</sup> . The comparison of obtained power flow solution with IEEE solution and errors in voltage magnitudes and phase angles at every bus are presented in Table 4. Table 5 presents the comparison of obtained power loss with the IEEE losses. Insignificant values of maximum errors of 0.0005 p.u and 0.010<sup>o</sup> for voltage magnitudes and phase angles are observed in Table 6. So that, in terms of accuracy the test results are consistent with IEEE results.

**Figure 7.** IEEE 13 Bus URDN.

**Table 4.** Fundamental voltage solution for IEEE−13 bus URDN.



**Table 5.** Power loss in IEEE−13 bus URDN.

**Table 6.** Power loss in IEEE−13 bus URDN.

