Patent ID: 9214815
Filing Date: 2015-12-15
Classification: H02J

Abstract:
1. A power supply system comprising: a commercial power supply; a load which generates power and consumes power; a battery which can be charged/discharged; a DC/DC converter which boosts an output voltage of said battery to generate a bus voltage on a bus between said DC/DC converter and an inverter, and charges/discharges said battery by using power supplied to said bus; the inverter rectifies AC power and supplies the power as DC power to said bus when charging said battery by providing to said bus the AC power obtained by subtracting power of said load from power of said commercial power supply limited in output, and converts said DC power of said bus voltage to AC power and supplies the power to said load when discharging said battery; an inverter controller which amplifies a deviation between a bus voltage command signal defining a command value of said bus voltage and a bus voltage signal obtained by detecting said bus voltage, inputs the amplified deviation to a first limit unit for limiting output power of said commercial power supply, divides the amplified deviation into a first deviation within a first limit value of the first limit unit and a second deviation exceeding a range of the first limit value, and controls said inverter based on said first deviation; and a DC/DC converter controller which controls said DC/DC converter based on said second deviation.