A photovoltaic power-generation system with peak power cut function

This paper presents a photovoltaic-peak power-cutting (PV-PPC) system capable of cutting peak load power. The proposed system is composed of a PV generator, DC–DC converter, storage battery, and an inverter. The function of the proposed PV-PPC system is to use PV energy to cut the peak load power in response to the change in the load demand and generating power. Four possible power flow scenarios are examined in detail through the bidirectional operation of the DC–DC converter and inverter, through the charging and discharging of the battery. The suggested PV-PPC system operation algorithm first selects the operational state by using differentiated charge and load information, with a simple structure to enable stopping in the case of system failure, and operates depending on the selected state. Then, the analysis modelling and operational control algorithm of the PV-PPC-generation system are performed in detail. Finally, the simulation and experimental results are presented to confirm the validity of the system.