Reactive power control for voltage regulation in the presence of massive pervasion of distributed generators

摘要

The high penetration of distributed generators in the conventional grid causes voltage rise in the network. In this paper, reactive power control with various control topologies has been used for voltage regulation in gird-connected photovoltaic system. Reactive power control using PV inverters is effective only if inverter's apparent power ratings are taken into account. This paper demonstrates that during peak hours, real power generation is maximum and so is the voltage rise at point of common coupling but the ability of inverters to provide the required reactive power is diminished due to apparent power capability of inverter. So some other source of reactive power along with PV inverters should be used during peak times to bring the voltage back into the statuary limits. This solution turns out to be cost effective as well as very simple to implement.