Looping of Radial Distribution Network to Mitigate the Over Voltage Problems and to Increase the Integrated Capacity of Solar PV

Due to the increase in demand for electrical energy, the integration of solar PV in the grid network is increasing at a great rate in both developing and developed countries. However, majority developing countries have radial power distribution networks and thus high penetration of solar PV can cause over voltage problems. This paper discusses the effects of solar PV integration on end line bus voltages and the resulting power losses in radial distribution network. A loop distribution network is proposed to solve the problems of over voltages and increase the integration capacity of solar PV. Seven different scenarios have been analyzed for both radial and loop distribution network by placing solar PV system at different buses and of different capacity on an IEEE-33 bus system and a comparison of the results is given using MATLAB/Simulink environment. The results show that by looping the radial distribution network, the problems of over voltages and power losses are minimized, and the integration capacity of solar PV can be increased.