谐波电网下基于矢量比例积分电流调节器的双馈异步发电机运行控制技术  

DFIG Operation Control Strategy Under Distorted Grid Conditions Based on VPI Current Regulators

作　　者：年珩[1] 宋亦鹏[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》2013年第6期101-111,15,共11页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50907057);国家863高技术基金项目(2011AA050204)~~

摘　　要：在分析谐波电网电压下双馈异步发电机(doubly-fedinduction generator,DFIG)数学模型基础上,以电磁转矩及定子输出无功功率无波动为控制目标,给出了DFIG谐波电流指令。为实现谐波电流的准确跟踪,采用基于同步速旋转坐标系下的矢量比例积分(vector proportional integral,VPI)电流调节器,通过与比例积分谐振电流调节器在谐波频率点处的频谱分析与对比,论证了VPI电流调节器对谐波电流的优良控制性能。构建了DFIG实验机组,对所提理论的正确性与可行性进行了实验验证。Based on the mathematical model of doubly-fed induction generators （DFIG） under harmonic distorted grid voltage conditions, harmonic current control strategy is proposed with the control target being no pulsation of the electromagnetic torque and stator reactive power. The vector proportional integral （VPI） current regulator is introduced to regulate the rotor current in the synchronous frame, and its excellent current tracking ability is well proved by analyzing and comparing the amplitude frequency and phase frequency curves with PIR current regulators. The DFIG harmonic control strategy is well validated by the experiment result based on DFIG experimental systems.

关 键 词：谐波电网电压 双馈异步发电机 矢量比例积分电 流调节器 比例积分谐振电流调节器 

分 类 号：TM31[电气工程—电机]