基于Crowbar的双馈异步风力发电系统低压穿越的仿真与分析

摘要

With the growing proportion of China' s wind power installed capacity, the security and reliability of the wind power system operation could not be ignored. Firstly, the operating principle of the doubly fed induction generation system was analyzed. The use of vector control technology achieved the maximum power tracking control and power decoupling control. Secondly, the crowbar circuit was used to achieve the low voltage ride through when a large value drops in the grid voltage. Modeling and simulation was made to verify the feasibility of the crowbar circuit ' s with MATLAB / Simulink. The crowbar circuit performance with different removal time and it in different systems with different power levels was discussed.%随着风电装机容量比例不断提高,其安全可靠性对电网稳定运行的影响已不容忽视.对双馈异步风力发电系统的运行原理进行分析,运用矢量控制技术实现了最大风能追踪及功率解耦控制.对电网电压跌落瞬态进行分析,并采用Crowbar保护电路,在电网电压大值跌落时实现低压穿越,并运用MATLAB/Simu-link对其进行建模仿真,验证Crowbar保护电路的可行性,讨论了不同切除时刻及不同功率等级系统中Crow-bar电路的工作性能.