ABSTRACT

Four-Switch mode Three-Phase (FSTP) inverter is considered as an
advanced inverter structure to diminish the price, complication, dimension and
losses during its switching. The traditional FSTP inverter usually achieves
merely buck DC- AC type conversion and highest voltage of the FSTP
structured inverter is same as V/2√3. Therefore, the output side line voltage
cannot go beyond this rate. To improve the VUF( voltage utilization factor) and
reliability of the conventional FSTP inverter, the FSTP SEPIC inverter is
considered in this research work, in which both the buck and boost DC-AC
conversion is achieved. The double integral Sliding-Mode Control (SMC) is
utilized to optimize its dynamics and also it is utilized to confirm whether
strength of the whole system at various operating situations is upto the limit.
Parameter design, element ranges, and the working of the FSTP-SEPIC based
inverter are also offered. The MATLAB Simulink model is used to validate the
concept of power utilization of Fuel Cell (FC) by the FSTP-SEPIC inverter.
Simulation result shows the efficiency of the inverter , both the buck and boost
operation with FC input. The inverter efficiency and other outputs of buck and
boost inverter operation with FC input is exhibited using Simulation.
Keywords - Fuel Cells, FSTP Inverter, SEPIC Converter, Double integral SMC.
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