Unbalanced load flow analysis for distribution network with solar PV integration

The global climatic change is one of the key issues faced by all countries today. Conventional power plants are emitting unwanted gases to the environment, which is the main reason for the climatic change. Many countries have changed their policies and have extended their support for green emissions. Large scale investments have been planned towards installation of Distributed Energy Resources (DER) in the Distribution Network (DN). Among the various DER solar power is more predictable source of energy. This paper emphasizes the impact of solar PV integration in a practical distribution system under continuously variable load pattern. The load flow analysis is performed through Forward / Backward Sweep (FBS) algorithm which is more suitable for a radial system. To get the dynamic behaviour of the system time series analysis is performed. The effectiveness of integration of solar PV is validated in an IEEE 123 node test feeder. The results reveal the voltage support attained in the network through integration of solar PV at selected locations.