5.1.2. Fundamental and Harmonic Power Flow Solutions without D-STATCOM

The regulator between buses 650 and 632 is removed and the capacitor banks at bus 675 and 611 are removed from the network. The data for the harmonic load composition and current spectra of harmonic loads aretaken from [32]. The convergence tolerance is taken as 10−<sup>4</sup> . Table 6 presents the harmonic power losses and total power loss of the network including fundamental and harmonic loss. The harmonic voltage solutions for the selected range of harmonics of order 3, 5, 7, 9, 11, 13, and 15 are presented in Table 7. Table 8 presents the fundamental r.m.s profile, the total harmonic voltage profile, and the THD %. It is observed from Table 8 that the maximum THD % on the network is 5.2263 at bus−611 for c-phase, and in [2], it was reported that the maximum THD % at bus−611 is 5.23. Therefore, the results of the proposed HPFA are almost matches the literature in terms of accuracy. To see the impact of the D-STATCOM on the fundamental r.m.s voltage profile, the total r.m.s voltage profile, the fundamental and harmonic power loss, and the THD %, the results of this case study are taken as benchmarks.
