Abstract

Application of the unified power flow controller (UPFC) to dispersed power supply system combined with fuel cell (FC), photovoltaic cell (PV) 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. This system can meet the multiquality electric power requirements of customers, and compensate voltage stability and uninterruptible power supply (UPS) function as well. Moreover, the response characteristics of this system is confirmed with the simulation by software PSIM and the required capacity of EDLC to compensate load demand is clarified by the simulation using software MATLAB/Simulink. An improved EMAP model, provided with limiting function in addition to the original EMAP model, was used to realize further reduction of EDLC capacity.

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