Özet:

The power quality factor (PQF), a single indicator ranging from 0 to 1 is used to measure the quality of power transfer of a hybrid energy system (HES) connected to grid supplying the 3Ø load. The aspects considered for power quality are: harmonic levels of the voltage and current; unbalanced 3Ø voltage and current; and phase displacement factor of different phases on the basis of their fundamental frequency. The PQF is unity when a balanced sinusoidal voltage and current is supplied by the network at the zero phase displacement. So, PQF analysis is done for the HES to analyze its quality. The proposed HES consists of solar photovoltaic (PV) system, the electrolyzer, the storage tank and the solid oxide fuel cell (SOFC). The HES is used to supply the electricity to the 3Ø load as well as 1Ø load which is synchronized to the grid with the help of voltage source converter (VSC). In this technology PV power is sufficient to fulfill the required load demand; if not then SOFC is used to fulfill the required amount of load. A fuel cell controller is proposed in which a PID controller is used to regulate the amount of hydrogen flow through the valve and utilized as fuel of SOFC. In this paper, hydrogen is generated from electrolyzer which takes extra PV energy and water as input elements. The complete model is simulated in Matlab/Simulink environment and also the results obtained are found to be satisfactory.

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