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Application of the unified power flow controller (UPFC) to dispersed power supply system combined with fuel cell (FC) and electric double layer capacitor (EDLC) is studied in this paper. This system is operated in autonomous mode, taking account of time delay characteristics of FC. The modified Euler type moving average prediction (EMAP) model is introduced to reduce the capacity of EDLC. This system can meet the multi- quality electric power requirements of customers, and ensures voltage stability and uninterruptible power supply (UPS) function as well. Moreover, the response characteristics of this system are confirmed with the simulation and the required capacity of EDLC to compensate load demand is clarified by the simulation based on collaborative operation methods by a prediction model.