双馈感应风电机组建模控制仿真

Modeling Control and Simulate of DFIG Wind Generator

随着双馈感应风力发电机的广泛应用,精确了解DFIG的静态及动态特性尤为重要。在深入研究DFIG内部结构的基础上,建立了DFIG发电机的9阶数学模型。并在风力机动力部分采用桨距角限速控制策略,在发电机电气部分采用定子磁链定向的矢量控制策略。分别针对DFIG对调度变化的响应,对阶越风速变化的响应以及对电网故障的响应(低电压穿越能力)三方面做了系统的理论研究。在DIgSILENT仿真软件中进行了仿真和验证,仿真结果表明了DFIG风机建模以及所采用控制策略的有效性,适用于大型DFIG风力发电机组,为DFIG风机的进一步研究打下基础。

The insight of the dynamic behaviors of doubly-fed induction generator（DFIG） is of great important due to the generator are widely utilized.Base on a 9th-order model of DFIG wind turbine system,limit speed with pitch angle control strategy is used for wind prime mover part and space vector with stator flux oriented control strategy is used for the electrical part.Aim at the study of the DFIG response to the power system regular control,step-up wind variations and grid fault（LVRT Ability）.The results of the simulation using DIgSILENT suggest that the modeling and the control strategy presented in the paper is accurate and valid.