谐波电网电压下PWM整流器增强运行控制技术  

Enhanced Control Technique of PWM Converter Under Harmonically Distorted Voltage Conditions

作　　者：年珩[1] 全宇[1] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《中国电机工程学报》2012年第9期41-48,8,共8页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50907057)~~

摘　　要：在推导考虑5、7次谐波电网电压下脉宽调制(pulse width modulation,PWM)整流器瞬时有功和无功功率数学模型基础上,以实现输入电流无谐波或输入功率无波动为控制目标,提出两种谐波电压下PWM整流器增强运行控制方案,进而讨论不同控制目标下PWM整流器基波和谐波电流指令计算原则。为实现谐波电压下基波和谐波电流的准确控制,设计在基频同步旋转坐标系、5倍频同步旋转坐标和7倍频同步旋转坐标系下的多PI电流控制方案。最后通过1 kW PWM整流器的实验系统搭建和实验结果分析,验证理论分析的正确性以及多PI电流控制方案的有效性。Based on the instantaneous active and reactive power mathematic model of PWM converter under the 5th and 7th harmonically distorted grid voltage, two different control strategy were proposed to reduce the input current harmonic components or power ripple to enhance the operation performance of PWM converter, in which the current reference of the fundamental frequency and the harmonic frequency for the different control target was deduced. Consequently, based on the fundamental frequency and harmonic frequency synchronous rotating reference frames of the grid voltage, a multiple PI CUl-rent control scheme was proposed to implement the accurate control of the fundamental frequency and harmonic frequency current. The feasibility of the proposed algorithms and control strategy were validated by experimental studies on a 1 kW PWM converter system.

关 键 词：谐波电网电压 PWM整流器 瞬时有功和无功功率 多PI电流控制 

分 类 号：TM46[电气工程—电器]