Title :
Instantaneous feedback control of a single-phase PWM inverter with nonlinear loads by sine wave tracking
Author :
Maussion, Pascal ; Grandpierre, Marcel ; Faucher, Jean ; Hapiot, Jean C.
Author_Institution :
Lab. d´´Electrotech. et d´´Electron. Ind., Inst. Nat. Polytech. de Toulouse, France
Abstract :
The authors propose a novel method for the instantaneous digital control of a PWM (pulse-width modulated) inverter used in an uninterruptible power supply. The output voltage is compared to a sinusoidal reference at each sampling instant to compute in real time through a digital controller the pulse width of the same interval. The closed-loop digital feedback eliminates the steady-state error of the output voltage with a very short computation time. This strategy is verified through computer simulations and provides a very fast compensation of disturbances caused by nonlinear loads, such as rectifiers and triac loads, with low total harmonic distortion and fundamental control
Keywords :
closed loop systems; digital control; feedback; pulse width modulation; uninterruptible power supplies; closed-loop digital feedback; feedback control; fundamental control; harmonic distortion; instantaneous digital control; nonlinear loads; rectifiers; sine wave tracking; single-phase PWM inverter; triac loads; uninterruptible power supply; Digital control; Digital modulation; Feedback control; Pulse inverters; Pulse width modulation inverters; Pulsed power supplies; Sampling methods; Space vector pulse width modulation; Uninterruptible power systems; Voltage control;
Conference_Titel :
Industrial Electronics Society, 1989. IECON '89., 15th Annual Conference of IEEE
Conference_Location :
Philadelphia, PA
DOI :
10.1109/IECON.1989.69623
