| Summary: | 碩士 === 國立中正大學 === 電機工程研究所 === 107 === This thesis designs a finite-time polynomial fuzzy output-feedback tracking control which is applied to a 5 kW three-phase bidirectional inverter. First, the circuit architecture of a three-phase bidirectional inverter is introduced. Because the system can operate in rectification mode and grid-connection mode, the state-equations in the two modes can be derived according to two-phase modulation (TPM), and we propose two theorems based on the finite-time polynomial fuzzy output-feedback tracking control. Theorem 1 has the Hꝏ performance which can restrain external disturbances to make the system stable in transient time, and we propose the SOS (Sum of Squares) stability equations. Theorem 2 has not only the advantages of theorem 1, but also considers the aging of components. Theorem 2 is more robust than theorem 1, so it also has the SOS stability equations to satisfy theorem 2 of stability conditions. Theorems 1 and 2 get the gains of the finite-time polynomial fuzzy output-feedback tracking control using Matlab SOSTOOLS. Finally, the gains are applied to three-phase bidirectional inverter, and operated in rectification mode and grid-connection mode. Experiments contain the constant power, such as 1kW, 3kW, 5kW, robustness of simulation and measurements. The results demonstrate that the performance of the Three-Phase bidirectional inverter using finite-time polynomial fuzzy output-feedback tracking controller is better than that of the division-summation controller for the three-phase bidirectional Inverter.
|
|---|
