抄録
The 2011 Tohoku Earthquake had a great impact on the energy policy in Japan. It has so far been expected to install a large amount of generation from renewable energy sources such as wind power generation and photovoltaic generation. However, it causes some problems in power systems, e.g. imbalance between demand and supply, and Battery Energy Storage System (BESS) is one of the effective solutions to these problems. Due to a high cost of the BESS, applications of customers' appliances to the new power system control in replacement of a part of BESS have gained much attention. This paper proposes a power system control method by use of a number of Heat Pump Water Heaters (HPWHs) not only for Load Frequency Control (LFC) but also for Economic Dispatching Control (EDC). Considering the total LFC capacity which is required to regulate the system frequency, the operation of the HPWHs is scheduled by using tabu search to minimize the fuel cost and the start-up cost of thermal power plants. The effectiveness of the power consumption control of the HPWHs for the LFC during the period which is scheduled by the proposed method is evaluated by numerical simulations.
