New approaches for regulation of solid oxide fuel cell using dynamic condition approximation and STATCOM

Abstract

Summary A new dynamic condition approximation method, which provides the current feedback, in collaboration with STATCOM regulation approach is presented to diminish the variation in voltage of solid oxide fuel cell (SOFC) electrical energy generators in connection to the compound power network in the time of faults. The suggested regulation approach is contrasted with the other present regulation techniques and the results show its advantage over the others in mitigating voltage fluctuation, inaccuracy and guarding the membranes inside the fuel cells. Because the dynamic internal conditions in the SOFC can precisely represent the transient conditions and dynamicity of the SOFC, their usage in designing the voltage regulator will provide more desirable control of voltage in the SOFC compared to the other approaches. Nonetheless, this model is not enough to mitigate AC voltage fluctuation which is caused by faults. Hence, STATCOM, which is a power electronic equipment, is applied to improve the alleviation of voltage variation and inaccuracy. Electricity network in the presence of the suggested regulation approach has shown stability in the linear assessments. Linear assessment of the system demonstrates that the final energy system embedded with the proposed regulation can maintain stability. Obtained numerical analysis demonstrates the validity of suggested approach.

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