摘要
文章对大功率双馈风力发电机网侧变流器并网时,电压不平衡问题提出一种有效网侧控制拓扑结构,该结构采用3个单相变流器代替原有的三相变流器,通过补偿电压达到限制故障电流同时稳定直流电压的目的。本方法减小了变流器容量,增强了可控性和适应性,同时还可在电压跌落或波动情况下保持同步到电网。最后在MATLAB/SIMULINK环境下,验证了文章所提控制方案的有效性。
In this paper, a problem of grid side converter for large power doubly fed induction generatorsis studied, and a comprehensive analysis of the mathematical model for wind turbine is carried out. For the grid voltage unbalance issues, an effective grid-side control strategy is proposed. The strategy has a topology with three single-phase converters instead of one three-phase converter, voltage is in- jected into the transmission line in series to limit the fault currents as well as to balance the voltages. The method reduces the inverter capacity, enhances its controllability and adaptability. This scheme can synchronize wind turbines and grid during faults or during voltage sags and swings. Finally, The ef- fectiveness of the proposed control strategy is confirmed with simulation results in MATLAB/ SIMULINK environment.
出处
《可再生能源》
CAS
北大核心
2013年第9期35-38,43,共5页
Renewable Energy Resources
基金
辽宁省教育厅项目资助(L2012463)
