High performance series-parallel type on-line UPS

被引：3
|
作者：
Kwon, JM [1 ]
Choi, JH [1 ]
Kwon, BH [1 ]
机构：
[1] Pohang Univ Sci & Technol, Dept Elect & Elect Engn, Pohang 790784, Kyungbuk, South Korea
来源：
INTERNATIONAL JOURNAL OF ELECTRONICS | 2006年 / 93卷 / 04期
关键词：
dUPS; power factor correction; inverter;
D O I：
10.1080/00207210600560417
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An improved single-phase uninterruptible power supply ( UPS) is proposed that is composed of a series converter and a parallel converter. The series converter regulates the output voltage, and then the parallel converter provides reactive current compensation and battery charging. A fast detection technique of the line voltage is proposed, which has almost zero transition time from the line power mode to the power failure mode. Furthermore, a current controller of the parallel converter for unity power factor is suggested and it is derived using the feedback linearization technique. A current limit technique in the power failure mode is proposed to protect the parallel converter without a system trip under any impulsive load. All control algorithms are implemented in software with a single-chip microcontroller. Experimental results obtained under a 3kVA prototype show good transient and steady-state performance such as almost negligible transition time, 97% power efficiency and 99% power factor.
引用
收藏
页码：207 / 222
页数：16
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