Home Energy Management Strategy for Electricity Energy Cost Minimization Considering ToU Tariff

Abstract

It is well documented that both solar photovoltaic (PV) and electric vehicles (EV) positively impact the global environment. But the integration of a large percentage of PV resources into distribution networks creates new challenges because of the uncertainty in PV power generation. Additionally, high power consumption during many EV charging operations at a certain time of the day can be stressful for the distribution network. Stresses on the distribution network influence electrical tariffs and higher electrical tariffs would negatively impact the electric energy cost for consumers. Therefore, it will be helpful to have a home energy management system to control electrical consumption. In this paper, the home energy management strategy is proposed with the goal of lowering electrical energy costs for the consumer under the time of use (ToU) tariffs. The proposed strategy can manage the operations of the solar PV, Plug-in Electric Vehicle (PEV), and the Energy Storage System (ESS) charging and discharging in a house to reduce the electrical energy cost for the consumer. To demonstrate the effectiveness of the proposed methodology, household load profile and the ToU tariffs are obtained from the Provincial Electricity Authority (PEA), Thailand. The simulation results show that the proposed strategy can calculate the electrical energy cost of the consumer equal to 0.3848 USD for a day. In the other words, the proposed strategy can reduce the electricity cost of the consumer by 87.7198% compared with the cost from the convention operation (PEV does not operate in V2H mode to support ESS operation).