Coordinated Photovoltaic and Battery Control using OPF in Distribution System for Supply-Demand Balance Maintenance of Bulk Power System

摘要

Owing to a large output variation, the PV power output can cause supply-demand imbalance in bulk power systems. In addition, the power flow reverses from distribution systems to transmission systems through the bank transformer, which may cause several network problems such as voltage violation or excess thermal capacity. In the previous studies, we developed methods to maintain supply-demand balance of the bulk power system with large PV integration by employing a battery energy storage system (BESS). However, those studies focused on the total supply-demand balance of the entire power system, and did not consider the behavior of the located PV systems and BESSs in the distribution systems. In this study, we proposed and evaluated the distribution system control method of PV systems and BESSs installed for the supply-demand balance maintenance control of bulk power systems.