直流微电网中基于谐振控制的双馈风机谐波消除方法  

Harmonic Elimination Method of Doubly-fed Induction Generator in DC-microgrid Based on Resonant Control

作　　者：朱小帆[1] 卫锋 李学佳 秦亮[1] 查晓明[1] ZHU Xiaofan;WEI Feng;LI Xuejia;QIN Liang;ZHA Xiaoming(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,Hubei Province,China;Department of Engineering,Singapore Institute of Technology,Singapore 138683,Singapore;China Huadian Hong Kong Company Ltd.,Xicheng District,Beijing 100031,China)

机构地区：[1]武汉大学电气工程与自动化学院,湖北省武汉市430072 [2]新加坡理工大学工程系,新加坡138683 [3]中国华电香港有限公司,北京市西城区100031

出　　处：《电网技术》2020年第1期96-104,共9页Power System Technology

基　　金：国家重点研发计划项目(2018YFB0904900,2018YFB0904903)~~

摘　　要：在直流微电网中,双馈异步发电机的定子侧采用二极管全桥整流器接入直流母线的并网结构。相对于传统的脉宽调制变流器直流并网结构,在降低结构成本的同时,为双馈异步发电机的定子侧带来了大量的谐波。为降低这种并网结构带来的谐波影响,提出了一种基于谐振控制的谐波消除方法。控制转子侧变流器以注入对应的补偿电流来抵消定子侧的谐波电流,且转子侧的基波分量控制不受谐波控制的影响。详细推导分析了上述控制器的参数设计和稳定性,通过仿真和实验验证了该谐波消除方法的有效性和实用性。所提算法具有计算量小、鲁棒性强、易于工程实现等特点。In DC microgrid,diode full-bridge rectifier is used to connect the stator side of doubly-fed induction generator(DFIG)to DC bus.Compared with traditional grid-connection structure using pulse width modulation(PWM)converter to connect DC bus,this structure could reduce cost,but bring massive harmonics to the stator side of DFIG.In order to reduce the harmonics,a harmonic elimination algorithm based resonant control is proposed in this paper.By controlling the rotor side converter,corresponding compensating current is injected to offset the harmonic current on the stator side.And the fundamental wave control will not be affected by the harmonic compensation loop.Parameter design and stability of the controller are also analyzed and deduced in detail.Finally,effectiveness of the proposed method is verified with both simulation and experimental results.The proposed algorithm has low computational complexity and strong robustness,easy to implement in engineering practice.

关 键 词：直流微电网 双馈异步发电机 二极管全桥整流器 谐波消除 谐振控制 

分 类 号：TM712[电气工程—电力系统及自动化]