沈阳工业大学学报2017，Vol.39Issue(6)：612-616,5.DOI:10.7688/j.issn.1000-1646.2017.06.03
电网电压不平衡情况下双馈风力发电变流器控制
Control of doubly-fed wind power generation converter under unbalanced grid voltage
摘要
Abstract
Aiming at the safety and stability problems caused by the double frequency harmonic components of output power of doubly-fed wind power generation system under the unbalanced three-phase grid voltage condition, a positive and negative sequence double closed loop current control strategy, where the control target is to eliminate the double frequency harmonic components, was proposed. The mathematical model for the grid-side converter of doubly-fed wind power generation system under unbalanced condition was established, and the generation mechanism of double frequency harmonic components was analyzed. In addition, the positive and negative sequence components were separated with the 1/4 cycle delay method, and the positive and negative sequence currents were separately involved in the operation control to counteract the double frequency power components. Moreover, the simulation system was established with the Matlab/Simulink software. The simulated results verify the correctness of theoretical analysis and the effectiveness of proposed control strategy.关键词
双馈风力发电/电压不平衡/二倍频/网侧变流器/数学模型/正负序分离/电流双闭环/仿真Key words
doubly-fed wind power generation/voltage unbalance/double frequency/grid-side converter/mathematical model/positive and negative sequence separation/current double closed loop/simulation分类
信息技术与安全科学引用本文复制引用
雷为民,苗友忠,罗玮,徐燕生,艾冰..电网电压不平衡情况下双馈风力发电变流器控制[J].沈阳工业大学学报,2017,39(6):612-616,5.基金项目
国家重点新产品计划资助项目(2014GR027008). （2014GR027008）
