CHARGING/DISCHARGING CONTROL APPARATUS, POWER STORAGE SYSTEM, AND CHARGING/DISCHARGING CONTROL METHOD

摘要

Provided is a charging/discharging control apparatus that can efficiently control charging/discharging of a plurality of storage batteries. The charging/discharging control apparatus is provided with a charging/discharging controller (100) and a DC-DC converter (200i). The charging/discharging controller (100) is provided with an overall current calculation unit (103) that calculates the overall current value from a DC bus reference voltage value and the overall power value, and a target current calculation unit (104) that calculates target current values for each of a plurality of strings (60i) from the overall current value, in accordance with the ratio of charging and the ratio of discharging. The DC-DC converter (200i) is provided with a DC bus voltage target-value calculation unit (202i) that calculates a DC bus voltage target-value from the target current values and the DC bus reference voltage value, a current limit value calculation unit (205i) that calculates a current limit value from the target current values, etc., and a DC bus voltage control unit (203i) that controls the DC bus voltage using the DC bus voltage target-value.