Hybrid method for voltage regulation of distribution system with maximum utilization of connected distributed generation source

The continued interest in the exploitation of distributed generation sources in recent years is leading to the growth of number of embedded generators (EGs) connected to distribution networks. The steady-state voltage rise resulting from the connection of these generators can be a major obstacle at the lower voltage levels. Present network design practice is to limit the generator capacity to the level at which the upper voltage limit is not exceeded with maximum generation and minimum load. This reduces the efficiency of DG system. This paper examines the local voltage variation and presents a method combining power factor and voltage control modes used selectively for embedded generators in distribution network with its maximum utilization. The simulation results are presented to verify the effectiveness of the method