摘要
文章通过对电网不平衡情况下风力发电系统的分析,提出了以抑制负序不平衡电流为主要控制方法的网侧变流器控制策略。为维持不平衡下直流母线电压的稳定,提出电流微分前馈的控制方法,结合以上两点控制方法设计出电网不平衡下永磁直驱风力发电系统网侧变流器综合控制策略,该控制方法结构相对简单、有效,并具有一定的低电压穿越能力。最后在Matlab/Simulink下仿真验证了3 MW永磁直驱风机控制的有效性。
After analysis of permanent magnetic synchronous generator（PMSG） wind power system under unbalance grid voltage, a grid side converter（GSC） control strategy which mainly suppresses negative sequence current of the system is presented. In order to maintain stability of the DC bus voltage, a current differential feed forward control method is proposed. Combining two control methods mentioned above, an integrated GSC control strategy of PMSG under unbalance gird voltage is devised. The control method is relatively effective and simple, and has a certain LVRT ability. Finally, the effectiveness is certified through the MATLAB / SIMULINK simulation of 3MW PMSG wind power generation system.
出处
《可再生能源》
CAS
北大核心
2014年第7期949-953,共5页
Renewable Energy Resources
基金
国家自然科学基金资助项目(51207095)
关键词
电网不平衡
PMSG
负序电流
电流微分前馈
unbalance of grid voltage
PMSG
negative sequence current
current differential feed forward
