双馈风力发电系统柔性并网控制策略研究

Flexible Grid-connection Control Strategy for Doubly-fed Wind Power Generation System

介绍了在空载条件下双馈风力发电系统柔性并网的控制策略研究。通过分析空载并网的基本思路,推导并建立双馈电机在空载条件下并网的数学模型,提出按照定子磁链定向矢量控制以及电网电压定向矢量控制结合的空载并网控制方案,并利用仿真软件Matlab搭建仿真模型进行仿真。仿真结果表明:在该控制策略下,定子电压很好地实现了对电网电压的快速跟踪,并网时刻冲击电流很小,并快速完成了风力发电系统的软并网。

The paper introduces a flexible grid-connection control strategy for doubly-fed wind power generation system under noload condition,establishes the mathematical model of doubly-fed wind generator with no load by analyzing the basic principle of the generator synchronization control with no load,and puts forward the control scheme based on stator flux and grid voltage-oriented vector control.Then the paper builds a model with Matlab and carries out simulation.The results show that the synchronization control for the generator with no load can make the stator voltage track the grid voltage accurately and quickly,the impulse current in gridconnected is very small,and the flexible grid-connection can be fast implemented.