Thermal units commitment with demand response to optimize battery storage capacity

Recently, the deregulation and liberalization in power market increase the competition in retail and power sector. Therefore, power company needs to reduce operational cost and maximizes the profit by operating generator with higher efficiency. For the operation of the thermal generating units, it is important to satisfy transmission constraints. One of the system to satisfy the transmission constraints is the battery storage system. However, the battery storage system requires high capital cost, therefore, it is impossible to introduce the large capacity of the battery storage system to the power system. This paper introduces the demand response system to the thermal units commitment program. The demand response system can reduce the additional battery storage system capacity to satisfy the transmission constraints. The heat pump water heater (HPWH) and the electric vehicle (EV) are assumed as demand response system. Simulation results show the validation of the proposed method and validate the performance and effectiveness of the algorithm for controllable loads and batteries.