Group-Based Voltage Control For Distribution System With High Penetration of PVs

In the Distribution System (DS), increasing the ratio of solar photovoltaic distributed generators (PV-DGs) results in overvoltage issues. For the reliable and stable operation of DS, this issue must be addressed. In this paper, the Group-Based Voltage Control (GBVC) technique has been proposed. In order to implement GBVC, novel differential entropy-based spectral-clustring clustering is used. It separates the DS in such a way that existing PV-DGs in the group can manage the voltage profile of the group. The optimal operating power of PV-DGs has been determined by implementing the Optimal Power Flow (OPF) within the group by satisfying multiple objectives, such as minimizing the active power curtailment and reactive power absorption by available PV-DGs within the group and system losses. The effectiveness of GBVC has been validated on IEEE 33 distribution system by comparing it with the Centralized Voltage Control (CVC) method regarding voltage profile, cumulative active power curtailment and reactive power absorption by PV-DGs, distribution system losses and computation time.