| Summary: | 碩士 === 國立中正大學 === 電機工程研究所 === 106 === A three-phase bidirectional inverter based on interval type-2 polynomial fuzzy control systems is designed and implemented in this thesis. The microcontroller Renesas RX62T is implemented as the system core. The systems parameters are feedbacked to the interval type-2 polynomial fuzzy controller via peripheral circuits and analog-to-digital converter (ADC). After calculations, the duty ratios of power switches in corresponding interval are obtained. This system can be operated in grid-connected mode and rectification mode. In this thesis, the state equation of three-phase inverter is first derived from two phase modulation (TPM). Next, the sum of square (SOS) type stability equation of the interval type-2 fuzzy control system with disturbance suppression is derived according to the Lyapunov stability theorem. The controller is designed based on the parallel distributed compensation(PDC) method. And the controller gain is solved by the SOS Toolbox. Finally, the control performance is verified by experimental results.
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