Abstract
With the spread of solar power generation (PV) and electric vehicles (EV) in general households, there is concern about fluctuations in the distribution system voltage. In this paper, voltage control is performed by utilizing the battery energy storage system (BESS) owned by the energy consumers. In previous research, household batteries system had been converted to smart inverters, and charging/discharging control based on SoC adjustment had been performed. However, charging/discharging active power for the purpose of distribution system contribution may disturb economical optimal operation in demand side. This paper focus on battery PCS free capacity and propose multi-objective usage of the battery system, for demand side use, e.g. self-consumption of non-FIT PV surplus power, and distribution system voltage control with Volt-Var control. The potential of PCS free capacity under operation of the battery system for each household over than 500 was evaluated as well as the effect of voltage control with real parameter based on distribution system simulator. Then with the quantitative evaluation, significant voltage deviation reduction was confirmed.
