Title :
Real-time digital control of PWM inverter with fuzzy logic compensator for nonlinear loads
Author :
Lin, Bor-Ren ; Hoft, Richard G.
Author_Institution :
Dept. of Electr. Eng., Nat. Yunlin Inst. of Technol., Toulin City, Taiwan
Abstract :
An algorithm which applies a fuzzy logic compensator to real-time control of the single-phase PWM (pulse-width-modulated) inverter for UPS (uninterruptible power supply) application is described. Using the state variables measured at each sampling time, the controller calculates the inverter pulse width for the next sampling time. The next interval pulse width is computed to eliminate the pulse width limitation due to the computation time of the microprocessor. A fuzzy logic controller is used to compensate for the voltage drop due to nonlinear loads. The proposed control scheme is verified by simulations for nonlinear load conditions, sudden load changes, and system parameter variations. The performance of the proposed scheme is shown to be excellent
Keywords :
digital control; fuzzy control; invertors; load (electric); microcomputer applications; pulse width modulation; real-time systems; uninterruptible power supplies; voltage control; PWM inverter; UPS; algorithm; application; digital control; fuzzy logic compensator; microprocessor; nonlinear loads; performance; real-time control; sampling; single-phase; state variables; uninterruptible power supply; voltage drop; Digital control; Fuzzy logic; Pulse inverters; Pulse measurements; Pulse width modulation inverters; Pulsed power supplies; Sampling methods; Space vector pulse width modulation; Time measurement; Uninterruptible power systems;
Conference_Titel :
Industry Applications Society Annual Meeting, 1993., Conference Record of the 1993 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-1462-X
DOI :
10.1109/IAS.1993.299000
