Patent ID: 8598839
Filing Date: 2013-12-03
Classification: H01M,H02J,Y02E

Abstract:
1. A method for controlling a plurality of sodium-sulfur batteries that, in an interconnected system in which a power generation device that fluctuates in output power and an electric power storage-compensation device are combined to supply power to an electric power system, are each included in the electric power storage-compensation device and compensate for fluctuations of the output power of the power generation device, the method comprising: managing a remaining battery level of each individual sodium-sulfur battery by inputting a current value required for charge/discharge of the sodium-sulfur battery into a control device, and performing, from an initially set battery capacity, addition/subtraction of the current value and integration; setting a remaining battery level target value common to all sodium-sulfur batteries; and determining a quantity of input/output power distributed to each sodium-sulfur battery, by multiplying, by a multiplying factor, a control quantity obtained from a deviation between a power generation plan value of the interconnected system and the power generation device that fluctuates in output power, wherein the multiplying factor is set such that a sodium-sulfur battery furthest from the target value is charged more and a sodium-sulfur battery closest to the target value is charged less by referencing the remaining battery level of each individual sodium-sulfur battery in real time.