The Effects of a Bifacial Photovoltaic Module on the Power System for Unit Commitment

It is becoming difficult to maintain the supply-demand balance of the power system only by adjusting the output of the generators and scheduling of unit commitment, due to the high penetration distributed renewable power sources. The PV demand imbalance causes an extreme mismatch with power generation and demand between daytime and nighttime and this is summarized as a duck curve problem. In order to mitigate this duck curve problem, this study proposes a bifacial PV module. Impacts of the bifacial PV module are evaluated by solving the UC problem, which is applying vertical installation type for a shift of PV's output peak and cooperation with battery energy storage management. The numerical simulation reveals the usefulness of the bifacial PV in points of installation capacity, total power generation, utilizing rate of PV system, and operating cost.