POWER SUPPLY SYSTEM AND POWER CONDITIONER FOR CHARGING AND DISCHARGING

摘要

In a grid independent operation, a generator power conditioner performs a maximum power point tracking control so as to maximize a generating power of a solar battery, and a charging-discharging power conditioner performs a constant voltage control so as to maintain a voltage of a grid-independent feed line sensed by a voltage sensor constant. The controller of the charging-discharging power conditioner controls a charge-discharge circuit to charge a storage battery when output power of the generator power conditioner is greater than consumed power of a load i.e., when the sensed voltage by the voltage sensor is greater than a target value. The controller controls the charge-discharge circuit so as to discharge the storage battery when the output power of the generator power conditioner is smaller than the consumed power of the load i.e., when the sensed voltage is smaller than the target value.