Optimal and fair real power capping method for voltage regulation in distribution networks with high PV penetration

The high penetration of distributed generation (DG) sources in distribution networks (DN) can induce overvoltage issues. In this paper, an optimal and fair real power capping method (RPCM) for voltage regulation in DN with high photovoltaic (PV) penetration is proposed. Based on the forecasting of solar radiance and load profiles, the method optimally dispatches the generation of PVs to prevent overvoltage with the objective of minimizing the energy curtailment of PVs for a given period of time. In addition, the RPCM is able to adaptively adjust the curtailment of PVs so that the PV systems in the DN could reach and keep similar accumulated curtailments during the period. Steady state simulation studies under various scenarios have been carried out on a 33-bus distribution feeder to demonstrate the effectiveness of the proposed method.