摘要
针对直驱型风机变流器的控制,提出了采用一种基于正负序并网电流解耦控制网侧变流器矢量控制策略,实现了当电网平衡或不平衡时全功率风力发电系统的稳定运行。根据风电系统需具备低电压穿越(LVRT)能力要求,采用所提控制策略并结合直流卸荷保护电路控制电网故障条件下的直流电压,从而实现了直驱型风力发电系统的故障穿越控制。仿真和实验结果表明,所提控制策略应用到直驱型风力发电系统中,可满足电网导则标准中关于全功率风力发电系统的并网电流控制要求。
In allusion to the control of MW level full power wind converter, one positive and negative sequence current decoupling control based vector control strategy of net side converter is proposed, for achieving the stable opera- tion of directly-drive wind power generation system in case of balanced or unbalanced grid voltage dips.According to low voltage ride through （LVRT） requirement of wind power generation system, the proposed control strategy is adopt- ed, accomplishing the ride through control of grid voltage dips in the full power wind generating system.Simulation and experimental results show that the proposed control algorithm could help the directly-drive wind power system to fulfill the guidelines of grid-connection control in the LVRT requirements.
出处
《电力电子技术》
CSCD
北大核心
2016年第9期27-29,共3页
Power Electronics
关键词
变流器
低电压穿越
直流卸荷保护电路
converter
low voltage ride through
direct current unloading protection circuit
