A preliminary study on impact analysis of grid-connected PV systems considering additional transformer installations

This paper proposes to install an additional distribution transformer to convert the open-wye/open-delta connection to wye/delta connection, anticipating mitigating the impact of a larger amount of PV systems connected to the distribution network. To validate the proposed scheme, various amounts and connections of PV systems are analyzed along with the examination of different scenarios. Simulation results confirm the benefits of this scheme to endure a higher impact of PV penetration. The outcomes gained from these tests are practically useful for utility engineers to make planning decisions.