Design and Implementation of a Single-Phase Bidirectional Inverter Using Robust Polynomial Fuzzy Control Systems

• Main Authors: LIU, CHIA-YU, 劉家侑
• Other Authors: YU, GWO-RUEY
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/29621161594481688113

碩士 === 國立中正大學 === 電機工程研究所 === 104 === In this thesis, the robust polynomial fuzzy control system are applied to a 2kW single-phase bidirectional inverter, which can operate on rectification mode and grid-connection mode. First the state-space equation of the single-phase bidirectional inverter is derived. The state variable of the integration of error is introduced to argument the state-space model. As a result, the nonlinear state equation of the inverter can be formulated via the polynomial fuzzy model. By adopting the Lyapunov stability theorem, the stability conditions for the inverter control system are propose such that the bias of diodes, voltage drop of power switches, and internal impedance of elements are restrained. These stability conditions are presented in the form of sum of squares. The control stage circuit is designed and implement, which includes the function of voltage drop feedback, LCD display and PWM signals output. The robust polynomial fuzzy controller is realized by the microprocessor TMS320F28069. Since the inductance variation has been considered in the design of the proposed polynomial fuzzy controller, there is no need to load the inductance data into the microprocessor. Compared to the division-summation method, the computation burden can be alleviated in the chip. Both computer simulation and experimental results demonstrate that the propose robust polynomial fuzzy controller is superior to the division-summation controller for the single-phase bidirectional inverter with external disturbance and model uncertainty operated on grid-connection mode and rectification mode.