Title :
Sinusoidal voltage controller for uninterruptible power supply by robust control
Author :
Senjyu, Tomonobu ; Uezato, Katsumi
Author_Institution :
Fac. of Eng., Univ. of the Ryukyus, Okinawa, Japan
Abstract :
The output voltage of an uninterruptible power supply (UPS) is distorted by nonlinear loads. To obtain sinusoidal output voltage of a UPS, a new control method of a pulse width modulated (PWM) inverter is proposed applying sliding mode control. The feedback gains of conventional sliding mode control are determined by offline calculation; however this proposed control method calculates the feedback gains in an online calculation to ensure the system´s stability with various disturbances. Sinusoidal output voltage is made by this controller, even if the parameter error in an inductance-capacitance (LC) filter is large.<>
Keywords :
control system synthesis; feedback; invertors; pulse width modulation; stability; uninterruptible power supplies; variable structure systems; voltage control; LC filters; PWM; UPS; control system synthesis; disturbances; feedback gains; inverter; nonlinear loads; online calculation; output voltage; parameter error; robust control; sinusoidal output voltage; sliding mode control; stability; uninterruptible power supply; voltage control; Control systems; Feedback; Nonlinear distortion; Pulse inverters; Pulse width modulation inverters; Pulsed power supplies; Sliding mode control; Stability; Uninterruptible power systems; Voltage control;
Conference_Titel :
Power Conversion Conference, 1993. Yokohama 1993., Conference Record of the
Conference_Location :
Yokohama, Japan
Print_ISBN :
0-7803-0471-3
DOI :
10.1109/PCCON.1993.264223
