*6.5. Comparative Performance Analysis under Non-Sinusoidal Voltage Conditions*

A simulation case was considered again with a non-linear load, but with a nonsinusoidal supply voltage condition only. The focus was on the current compensation by the UPC under non-sinusoidal voltage conditions. Figure 10a,b indicates the source voltage with harmonics (10% of 3rd, 5th and 7th order harmonic components) and the load voltage with compensation from the UPC system. Figure 10c,d illustrates the FFT analysis of the source voltage and load voltage, respectively. The load voltage was reduced from around 15% to 3%.

The efficacy of the SRF method of compensation over the conventional PQ method under non-sinusoidal voltage conditions in terms of current compensation and equal reactive power sharing, as discussed in Section 4, is exhibited in a further analysis.
