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This paper presents a comparative performance study of Cuckoo Search Algorithm (CSA) and Firefly Algorithm (FA) optimized proportional plus integral (PI) controller for the frequency control of solar-diesel-fuel cell-battery-aqua electrolyser based autonomous hybrid power system. In such an autonomous hybrid power system, infinite bus concept is not applicable. Therefore, with changing load, generation...
Fuel-cell power systems comprising single-phase dc/ac inverters draw low-frequency ac ripple currents at twice the output frequency from the fuel cell. Such a 100/120 Hz ripple current may create instability in the fuel-cell system, lower its efficiency, and shorten the lifetime of a fuel cell stack. This paper presents a waveform control method that can mitigate such a low-frequency ripple current...
In this paper a hybrid distributed generation (DG) system connected to isolated load is studied. The DG system consisting of photo voltaic (PV) system, fuel cells, aqua electrolyzer, diesel engine generator and a battery energy storage system. The ambient temperature value of PV is taken as constant to make the output power of PV is directly proportional to the radiation and output power of other...
A proportional-plus-integral (PI) controlled based small-signal analysis of isolated autonomous hybrid system with different energy storage combinations is presented in this paper. The hybrid systems supplying power to isolated loads comprise of different renewable energy resources such as wind, photovoltaic (PV), fuel cell (FC) and diesel engine generator (DEG) along with the energy storage devices...
In this paper a microgrid consisting of wind turbine generators, aqua electrolyzer, fuel cell and diesel generator is analyzed with an assumption that the power generated from the wind turbine generator remains constant during a load disturbance. On the other hand power produced from all the other distributed generation (DG) sources are regulated by simple PI controllers. As the balance between the...
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