標題: | DSP-embedded UPS controller for high-performance single-phase on-line UPS systems |
作者: | Lai, CH Tzou, YY 電控工程研究所 Institute of Electrical and Control Engineering |
關鍵字: | on-line UPS;digital signal processor (DSP);digital control;software current control;nonlinear pulsewidth compensation;digital power factor control;total harmonic distortion (THD) |
公開日期: | 2002 |
摘要: | This paper proposes a DSP-controlled transformerless common-neutral single-phase on-line UPS with balanced charging/discharging control. All the control functions for an on-line UPS, which includes power-on start-up control, input stage power factor control, battery charging and boosting control, output stage ac voltage regulation, and shut-down control, were realized by using a single-chip DSP controller. A multiple rate digital controller generates all the PWM control signals for the power stage by using a set of detected feedback signals. Software current control scheme with nonlinear pulsewidth compensation has been developed to eliminate the nonlinearity caused by the dead-lock protected PWM converters. A nonlinear digital control scheme with lower switching frequency has been developed for the power factor control of the ac-dc converter. Computer simulation and experimental results have been given to verify the proposed digital control scheme. The constructed DSP-controlled UPS system can achieve fast dynamic response for nonlinear loads and high power factor under various loading conditions. |
URI: | http://hdl.handle.net/11536/18757 |
ISBN: | 0-7803-7474-6 |
ISSN: | 1553-572X |
期刊: | IECON-2002: PROCEEDINGS OF THE 2002 28TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY, VOLS 1-4 |
起始頁: | 268 |
結束頁: | 273 |
顯示於類別: | 會議論文 |