Assessment of overvoltage and power losses in low voltage distribution networks with high photovoltaics penetration based on prosumers' self-consumption

Abstract

In recent years, distributed generation (DG) has increased rapidly due to the government's incentive policies. Therefore, two-way energy transaction between grid and householders with DG (prosumers) has become common. Moreover, many benefits such as economic revenue, carbon dioxide saving, and peak demand reduction are obtainable. However, this situation has become an increasingly severe problem. High PV penetration with a low self-consumption ratio (SCR) leads to grid power losses and overvoltage issues. This paper investigates the impact of SCR on power losses and voltage fluctuation in low voltage distribution networks (LVDN). Findings indicate that an overvoltage problem occurs if SCR remains under a certain value. The power losses decrease as the SCR increases. Nevertheless, when the SCR approaches a particular value, the losses increase accordingly.