Rechargeable batteries such as Redox Flow, which are not aged by frequent charging and discharging, have a quick response equivalent to SMES and outstanding function during overload. The battery efficiency increases when the cycle period of charging/discharging becomes shorter. In addition to leveling load, the battery is advantageous for secondary control in the power system and maintenance of power quality of distributed power resources. In this paper, we study the control performance of RF battery systems in its application to LFC. Using dynamic simulation, we show that the LFC capacity of RF battery systems is ten times that of fossil power systems due to quick response characteristics .

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This paper presents an evaluation of the North American Electric Reliability Council's (NERC) new control performance standards, as they might be applied to the Western Japanese 60-Hz system. Dynamic simulation of the system frequency response, including the effects of primary and secondary frequency control, power plant response, and load fluctuation characteristic were performed using a load flow program during normal system operation. Parameter sensitivities have been studied for some of the pertinent control parameters influencing the generation control performance, including power plant and automatic generation control (AGC) response parameters and amounts of generation under control for governor and AGC.