Performance Comparison Between Single-Phase and IEEE-1547 Three-Phase Voltage-Reactive Power Controls for Three-Phase Photovoltaic Systems

This work focuses on a comparison between the effects, on an electrical power system, of adopting, for three-phase inverters, a three-phase averaged Volt/Var algorithm, as proposed by IEEE 1547 standard, and employing three, separate, control references for each phase. In order to carry out its proposal, two daily simulations were performed on the IEEE 34-Bus test case feeder. Three-phase phovoltaic systems were placed across the feeder, and, for each batch of power flows, they were configured to apply each one of the evaluated control algorithms. The single-phase Volt/Var performed significantly better, while not producing higher losses. Depending on the conditions of the circuit, it could also be observed that there may be a higher or lower effort from the inverters in order to satisfy the requested reactive power output demanded by the algorithm.