基于宽频带转子附加阻尼的双馈型风机次同步振荡抑制策略  

A suppression strategy for DFIG subsynchronous oscillation based on broadband rotor additional damping

作　　者：朱玲 许翔 侯玉强 牛拴保 李威 柯贤波 魏平 常喜强[4] 

机构地区：[1]南瑞集团(国网电力科学研究院)有限公司,江苏南京211000 [2]南京理工大学自动化学院,江苏南京210094 [3]国家电网西北分部,陕西西安710048 [4]新疆电力公司调度通信中心,新疆乌鲁木齐830002

出　　处：《电力系统保护与控制》2018年第2期37-42,共6页Power System Protection and Control

基　　金：国家电网西北分部资助项目"多电源类型特高压送端电网网源协调技术深化研究";山西省电力公司项目"山西电网次同步振荡的仿真分析及控制措施"

摘　　要：针对双馈型风电场并网引发的次同步振荡问题进行了研究,建立了双馈电机以及变流器的等效模型。基于动态等值阻抗解析式分析了并网阻抗特性的关键影响因素。结果表明控制器转子侧内环增益对次同步频带阻抗特性影响较大。在此基础上,提出了一种基于宽频带转子附加阻尼控制的次同步振荡抑制措施。该抑制措施实施于双馈型风机转子侧变流器控制中,无须附加装置,利于工程实现。最后,通过时域仿真验证了该抑制措施的有效性以及在暂态工况下的适用性。This paper studies the problem of the synchronous oscillation caused by Doubly Fed Induction Generator（DFIG） grid connection, and sets up equivalent model of DFIG motor and converter. Based on dynamic equivalent impedance analytic expression, the key factors of grid-connected impedance characteristics are analyzed. The results show that the internal loop gain of the controller rotor side has a large effect on the impedance characteristics of subsynchronous frequency band. On this basis, the paper puts forward a subsynchronous oscillation suppression method based on broadband rotor additional damping control. The proposed method is implemented on converter control of DFIG rotor side, without additional device and good for engineering application. Finally, the validity and applicability under transient condition of the suppression strategy are verified by time-domain simulation.

关 键 词：次同步振荡 宽频带 附加阻尼控制 串联补偿 并网阻抗 

分 类 号：TM614[电气工程—电力系统及自动化] TM712