双馈感应风力发电机的负电阻效应研究

doi:10.19912/j.0254-0096.tynxb.2020-0730

太阳能学报 ›› 2022, Vol. 43 ›› Issue (4): 324-332.DOI: 10.19912/j.0254-0096.tynxb.2020-0730

• 电化学储能安全性与退役动力电池梯次利用关键技术专题 • 上一篇下一篇

双馈感应风力发电机的负电阻效应研究

邢法财, 徐政

浙江大学电气工程学院,杭州 310027

收稿日期:2020-07-28 出版日期:2022-04-28 发布日期:2022-10-28
通讯作者: 徐政（1962—）,男,博士、教授,主要从事直流输电和柔性交流输电技术方面的研究。xuzheng007@zju.edu.cn
基金资助:
国网总部科技项目（复杂电网下新能源发电基地的次/超同步振荡风险评估、抑制与防控技术研究SGXJ0000TKJS1800238）

INVESTIGATION ON NEGATIVE-RESISTANCE EFFECT OF DOUBLY-FED INDUCTION GENERATOR

Xing Facai, Xu Zheng

College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China

Received:2020-07-28 Online:2022-04-28 Published:2022-10-28

摘要/Abstract

摘要： 为评估双馈风电场经串补送出系统的振荡风险,该文重点对双馈风力发电机的负电阻效应进行研究。首先,结合双馈风力发电机常用的控制结构,通过分析其扰动响应特性建立端口导纳模型。在此基础上,通过等效电路分析建立异步发电机转子回路的等效阻抗模型。进一步地,对转子回路的负电阻特性进行研究,并定义2个特征指标来定性评估系统的振荡风险。最后,通过时域电磁暂态仿真验证所建立模型的准确性和特征指标的有效性。算例分析表明：双馈风力发电机的负电阻效应主要取决于异步发电机的转子回路,会受到运行转速、转子电阻及转子侧换流器控制器参数等的影响。

关键词: 双馈风力发电机, 电力系统稳定性, 稳定性标准, 电气阻抗, 负电阻

Abstract: For the oscillations risk assessment of the double-fed induction generator （DFIG） transmitted by the series-compensated grid, the negative-resistance effect of the DFIG is specially investigated in this paper. Firstly, based on the common control structure, the port-admittance model of the DFIG is established by analyzing its response characteristics to disturbances. On the basis, the equivalent rotor impedance of asynchronous generator is derived based on the equivalent electrical circuit analysis. Subsequently, the negative-resistance characteristics of the rotor circuit are further investigated and two characteristic indexes are defined to evaluate the oscillations risk. Finally, the accuracy of the port-admittance model and the effectiveness of the characteristic indexes are verified through the time-domain electro-magnetic transient simulation. From case studies, it indicates that the negative-resistance effect of the DFIG mainly depends on the rotor circuit of asynchronous generator. It is influenced by the rotating speed of the generator, the resistance of the rotor windings, and the controller parameters of the rotor-side converter.

Key words: DFIG, electric power system stability, stability criteria, electric impedance, negative resistance

中图分类号:

TK513.5

邢法财, 徐政. 双馈感应风力发电机的负电阻效应研究[J]. 太阳能学报, 2022, 43(4): 324-332.

Xing Facai, Xu Zheng. INVESTIGATION ON NEGATIVE-RESISTANCE EFFECT OF DOUBLY-FED INDUCTION GENERATOR[J]. Acta Energiae Solaris Sinica, 2022, 43(4): 324-332.

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双馈感应风力发电机的负电阻效应研究

INVESTIGATION ON NEGATIVE-RESISTANCE EFFECT OF DOUBLY-FED INDUCTION GENERATOR

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