Verification of Effect of the Bifacial PV module on the Unit Commitment

Abstract

This paper presents the bifacial photovoltaic (PV) module for power system operation. The main proposal is a vertical installation set of the bifacial modules, in order to mitigate the restriction of PV interconnection due to the duck curve problem. The installation set shows shifted and pushed peak and bimodality in the power generation curve. The characteristics are clarified by detailed irradiance model calculation. It has a possibility to reduce the mismatch between generation and load by shifted and pushed peak characteristics. Moreover, the bimodality generation curve can shorten the charging/discharging cycle of the energy storage battery and it may reduce the storage capacity. However, the massive installation of the bifacial module has not been evaluated in the power system. The unit commitment (UC) problem is the most suitable framework in order to evaluate proposed installation set of the bifacial modules. Therefore, in this paper, Netload curve with bifacial generation profile applied to the UC problem. Verification by solving the UC problem clarified the effectiveness of a simple method which is bifacial PV module installation set from viewpoints of PV installation capacity, total PV generation, installation cost, fuel cost, daily operation cost.