| UPS并联系统的SPWM再调制控制技术研究 |
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| 引用本文： | 段善旭,刘邦银,康勇,陈坚.UPS并联系统的SPWM再调制控制技术研究[J].中国电机工程学报,2004,24(1):81-86. |
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| 作者姓名： | 段善旭 刘邦银 康勇 陈坚 |
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| 作者单位： | 华中科技大学电子与电气工程学院,湖北,武汉,430074 |
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| 基金项目： | 国家自然科学基金项目(50007004)。~~ |
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| 摘 要： | 在全数字化并联UPS系统中，由于定时器的最小时基的限制，系统的同步控制精度低。该文提出了一种简单实用的基于再调制SPWM的数字同步控制策略。文中给出了几种SPWM再调制的实现方案，并对比分析了其调节精度和谐波特性。对采用再调制SPWM控制的并联UPS系统进行了数字仿真和实验研究，最后与未采用再调制SPWM控制的系统进行了对比分析。仿真和实验结果表明再调制SPWM控制策略大大提高了系统的同步控制精度，保证了并联UPS系统的稳定运行，较好地抑制了UPS模块间的环流。
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| 关 键 词： | UPS 并联系统 不间断电源 SPWM 数字化同步控制 再调制控制 谐波特性 |
| 文章编号： | 0258-8013(2004)01-0081-06 |
| 修稿时间： | 2003年11月30 |
THE TECHNIQUES OF SPWM RE-MODULATION OF UPSS IN PARALLEL OPERATION |
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| DUAN Shan-xu,LIU Bang-yin,KANG Yong,CHEN Jian.THE TECHNIQUES OF SPWM RE-MODULATION OF UPSS IN PARALLEL OPERATION[J].Proceedings of the CSEE,2004,24(1):81-86. |
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| Authors: | DUAN Shan-xu LIU Bang-yin KANG Yong CHEN Jian |
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| Abstract: | The resolution limiting of synchronization control precision, in the fully digital parallel-connected UPS system, is imposed by the hardware timer. An applied digital synchroniza-tion control strategy based on SPWMre-modulation for parallel-connected UPSs is presented in this paper. Several different methods of SPWM re-modulation are also described, and the control precision and harmonics of the technology are analyzed in detail. As a comparison, the digital simulation and experimental studies of the parallel UPS system controlled by SPWM re-modulation and conventional SPWM are respective-ly conducted. Simulation and experimentalresults are included to show that this method can improve the synchronization control precision, insure the stability of parallel UPS system and suppress the circulating current between UPS modules. |
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| Keywords: | UPS Parallel operation Digital synchroniza-tion control SPWM re-modulation |
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