双馈风力发电机阻尼控制方法的改进

陆仕信1; 刘国荣2

双馈风力发电机阻尼控制方法的改进

引用本文：陆仕信1，刘国荣2.双馈风力发电机阻尼控制方法的改进[J].计算技术与自动化,2018,(3):50-55

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作者	单位
陆仕信1，刘国荣2	（1.湘潭大学信息工程学院，湖南湘潭 411105； 2.湖南工程学院，湖南湘潭 411104）

中文摘要:为研究双馈风力发电机的低电压穿越特性，建立了磁链状态方程并求解其特征根。对几种典型的改进励磁电流控制方法进行分析，得出此类方法均是通过控制转子电流指令值来加快磁链的暂态衰减，从而提出在电流环参考值的基础上添加定子磁链暂态分量的补偿项，来改善系统欠阻尼特性，针对PI控制器对交流量调节能力有限，引入电流前馈补偿项，对其进行修正。仿真表明，改进的阻尼控制方法加速了暂态磁链的衰减，提高了故障穿越能力。

中文关键词:双馈感应电机欠阻尼特性前馈补偿低电压穿越

Improved Damping Control Method for Doubly Fed Wind Power Generator

Abstract:In order to research the low voltage ride through characteristics of doubly-fed induction generators， the equation of state is established and the characteristic roots is solved. By analyzing several typical improved excitation current control strategies， it is concluded that these methods used to control the rotor current reference value to accelerate the transient decay of flux. Consequently， the compensation term of the stator flux transient component is added on the basis of the reference value of the current loop， in order to optimize the system under-damping characteristics. Because the PI controller has limited capacity to adjust the AC reference，the feed forward current compensation term is introduced to correct it.Simulation results show that the improved damping control method can accelerate the decay of transient flux linkage and improve the low voltage ride through capability.

keywords:doubly fed induction generator under-damping characteristics feed forward compensation low voltage ride through

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