The surplus power that will be caused by large penetration of PV in power system can affect the stable operation of power system and degrade the reliability of power supply. In order to overcome the above problem, cooperative operation with customer's appliances, such as heat pump water heater (HPWH) and battery, is proposed. This paper shows a study case of utilizing surplus power of Photovoltaic generation (PV) system by using customers' appliances.
