Reactive power management of co-located residential PVs for radial distribution systems

Electricity plays an important and leading role in the flourishing of the world economy as sustainable and cost-efficient energy carrier for everyday needs. With the fast economic expansion in the developing areas, the cost of electricity has increased accordingly. The use of renewable distributed generation (DG) technologies and "green power" can provide a significant environmental benefit, and their costs continue to dropping. Utilities will try to get more injected renewable energy to our distribution network. This paper presents a reactive power management method based optimal power flow to calculate optimal DG power output and necessary voltages at buses and incremental costs in the distribution system integrating high penetration rate of renewable energy resources. The proposed method is able to minimize the electricity cost by cutting the power transferred from the grid and provide the co-optimized operation strategy for distribution system with residential photovoltaics (PVs), Case study is also presented to demonstrate the feasibility of proposal method.