大規模蓄電池システムの高効率有効電力指令配分手法に関する考察

抄録

A large scale battery energy storage system, which can output power at MW-order, has many Power Conditioning Systems (PCSs). The authors have proposed an active power distribution method for PCS. The active power distribution method uses information of Need of Charge (NOC) and Maximum Efficiency Power point (MEP), and the method is called NOC-MEP method. The NOC-MEP method showed higher charge/discharge efficiency than the conventional method in which active power is equally distributed to each PCS. The NOC-MEP method has been installed in the battery system at Nishi-Sendai substation of Tohoku Electric Power Co. Inc. This paper reports the charge/discharge efficiency of battery system at Nishi-Sendai substation, which uses the NOC-MEP method.