Voltage regulation of power distribution networks interconnected with a decentralized photovoltaic power producer

The expansion of the insertion of photovoltaic (PV) systems into distribution power systems causes a variety of problems in the operation power grid especially voltage variations. This paper focuses on the voltage changes on each node of the distribution network before and after the insertion of photovoltaic power sources, and uses two voltage control methods to maintain a stable voltage profile. The simulation results, using Matlab®/Simulink®, clearly show the effectiveness of the suggested regulators and their optimal capacity control.