基于简化p-q-r理论的统一电能质量调节器控制策略  

A New Control Strategy of UPQC by Using Simplified p-q-r Theory

作　　者：谭智力[1] 李勋[1] 陈坚[1] 康勇[1] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北省武汉市430074

出　　处：《中国电机工程学报》2007年第36期85-91,共7页Proceedings of the CSEE

摘　　要：阐述了p-q-r瞬时功率理论的原理,提出一种特殊情况下的简化p-q-r理论,基于这一理论,提出一种统一电能质量调节器(unified power quality conditioner,UPQC)的综合控制策略,此策略综合了通常的直接控制策略和间接控制策略的特点。重点介绍了补偿电流及补偿电压的计算方法,详细分析了控制策略的原理,推导出p-q-r坐标下的相关运算公式,给出了在该坐标轴上的详细控制框图。仿真结果显示,将采用这种控制策略的UPQC用于补偿三相四线非线性及不平衡系统,可以实现对负载谐波、无功及中线电流较好的补偿,使负载获得额定端电压,同时提高电源侧功率因数,表明这种控制策略是可行、有效的。The p-q-r instantaneous power theory is introduced firstly, and then a simplifiedp-q-r theory is proposed under a special condition. Based on this theory, it presents a composite control strategy of unified power quality conditioner （UPQC）, which is the combination of the ordinary direct and indirect control strategy. An algorithm of calculating the compensation current and the compensation voltage are introduced. A principle analysis of the proposed control strategy is described in particular. Meanwhile the control formulas on the p-q-r coordinate are deduced in detail. The control schematic diagram based on these formulas is presented. Simulation results show that, when the UPQC applying such control strategy is used for the compensation of the nonlinear and unbalance three-phase four-wire system, the harmonic current, reactive power of loads as well as neutral current are compensated well, load voltage get balanced and rated, power factor of power source is about unity, which verified the effectiveness of applying such control strategy in UPQC.

关 键 词：简化p-q-r理论 三相四线系统 统一电能质量调节器 综合控制策略 

分 类 号：TM344[电气工程—电机]