Title :
Standby power supply with active power filter ability using digital controller
Author :
Choi, Jae-Ho ; Park, Ga-Woo ; Dewan, Shashi B.
Author_Institution :
Dept. of Electr. Eng., Chung-Buk Nat. Univ., Cheongju, South Korea
Abstract :
This paper presents a standby power supply/active power filter (SPS/APF) system. This system provides combined functions of high efficiency power backup and harmful harmonics elimination. Based on the bilateral power converter using a current forced switching scheme, the line current can be sinusoidally regulated with unity power factor in APF mode and the voltage waveform distortion can be kept small in SPS mode by instantaneous voltage control. Introduction of the harmonic problems generated by the nonlinear loads, the calculation method of the instantaneous reactive current components achieving current distortion compensation and power factor correction, and the full digital control hardware and software schemes using a TMS320C25 digital signal processor are discussed in detail. Finally, the theoretical analysis is verified both by simulated and experimental results in a 3 kW laboratory prototype system
Keywords :
PWM power convertors; active filters; circuit testing; digital control; harmonic distortion; network analysis; power engineering computing; power factor correction; power filters; power system harmonics; reactive power control; switching circuits; uninterruptible power supplies; voltage control; 3 kW; TMS320C25 digital signal processor; active power filter; bilateral power converter; current distortion compensation; current forced switching scheme; digital controller; efficiency; hardware; harmonics elimination; instantaneous reactive current components; instantaneous voltage control; line current; power factor correction; software; standby power supply; unity power factor; voltage waveform distortion; Active filters; Emergency power supplies; Harmonic distortion; Power generation; Power harmonic filters; Power system harmonics; Reactive power; Signal generators; Switching converters; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1995. APEC '95. Conference Proceedings 1995., Tenth Annual
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2482-X
DOI :
10.1109/APEC.1995.469031
