Patent ID: 9639074
Date: 2017-05-02
CPC Classifications: G05B,H01M,H02J,Y02B,Y02E

Claim:
1. A power supply system for supplying power to a load from a commercial power source, a power generator and a storage cell, the system comprising: a demand measurement unit configured to measure demand power of the load; a power generation measurement unit configured to measure generated power from the power generator; a threshold storage unit configured to store a discharge control threshold power value to determine whether to discharge the storage cell; a command unit configured to give a control command to control discharge of the storage cell based on a comparison between the remaining power in the storage cell and the discharge control threshold power value, when the demand power is larger than the generated power; and a control unit configured to control the discharge of the storage cell according to the control command from the command unit, wherein the command unit gives a control command to discharge the storage cell when the remaining storage cell power does not exceed the discharge control threshold power value and a difference between the demand power and the generated power exceeds a predetermined power purchase limit threshold.