基于负序电流抑制策略的DFIG系统  

DFIG System Based on Negative Sequence Current Suppression Strategy

作　　者：马丽军 施红如 MA Lijun;SHI Hongru(School of Electrical and Energy Engineering,Nantong Institute of Technology,Nantong 226000,China)

机构地区：[1]南通理工学院电气与能源工程学院,江苏南通226000

出　　处：《通信电源技术》2023年第5期10-12,共3页Telecom Power Technology

基　　金：2022年南通市科技计划项目-指导性项目“弱电网双馈风电机组的动态稳定性研究”(JCZ2022120)。

摘　　要：主要针对双馈异步风力发电机(Doubly Fed Induction Generator,DFIG)系统在不平衡电网电压条件下的网侧变换器进行研究。基于不平衡电网电压条件,发现在传统的控制策略下,网侧逆变器会向电网输送含有二倍频的有功和无功功率,且输送过来的二倍频会产生一定波动,这些波动可以直接影响三相电网的电压和电流值,从而使电网的电流值发生畸变。因此在不平衡电网电压的工况下,提出了DFIG系统的负序电流抑制策略,以抑制电网电压不平衡时产生的负序电流。In this paper,the grid-side converter for the Doubly Fed Induction Generator(DFIG)system under unbalanced grid voltage is studied.Based on the unbalanced grid voltage condition,it is found that under the traditional control strategy,the grid-side inverter will transmit active and reactive power containing double frequency to the grid,and the double frequency transmitted will produce certain fluctuations,which can directly affect the voltage and current value of the three-phase grid,thus distorting the current value of the grid.Therefore,under the condition of unbalanced grid voltage,this paper proposes the negative sequence current suppression strategy of DFIG system to suppress the negative sequence current generated when the grid voltage is unbalanced.

关 键 词：双馈异步风力发电机(DFIG)系统 网侧变换器 二倍频 三相电网 

分 类 号：TM721[电气工程—电力系统及自动化]