Abstract:
This paper presents a power management system of a household photovoltaic-battery hybrid
power system within demand side management under time of use electricity tariff. This system is
easy to implement by employing cheap electrical switches, off-the-shelf chargers and inverters.
Control system models combining both power dispatching level and home appliance scheduling
level are proposed to minimize the residents’ energy cost and energy consumption from the grid
with the practical constraints strictly satisfied. In addition, the resident comfort inconvenience
level is considered in the control system models. The trade-off among operating cost, energy
consumption and inconvenience is considered and a multi-objective optimization problem is formulated.
The optimal control strategies are derived by solving a mixed-integer nonlinear programming
problem. Simulation results show that the energy cost and energy consumption from
the grid can be largely reduced with the proposed strategies. These results are important for customers
to dispel their major uncertainty in determining whether to newly install or update to such
photovoltaic-battery hybrid power systems.
