故障下双馈风电系统机电能量平衡的可行性分析

doi:10.11930/j.issn.1004-9649.2016.11.094.06

中国电力 ›› 2016, Vol. 49 ›› Issue (11): 94-99.DOI: 10.11930/j.issn.1004-9649.2016.11.094.06

故障下双馈风电系统机电能量平衡的可行性分析

王珂¹, 王新霞², 焦东翔¹, 张鹏¹, 魏新宇¹

1. 国网冀北电力有限公司秦皇岛供电公司,河北秦皇岛 066000;
2. 西南交通大学,四川成都 610000

收稿日期:2016-08-15 出版日期:2016-11-10 发布日期:2016-12-09
作者简介:王珂（1991—）,女,河南新乡人,硕士,工程师,从事电力电子技术研究。E-mail: wangke_2000@126.com

Feasibility Analysis on Energy Balance of Doubly-Fed Wind Power Systems Under Grounding Faults

WANG Ke¹, WANG Xinxia², JIAO Dongxiang¹, ZHANG Peng¹, WEI Xinyu¹

1. Qinhuangdao Power Supply Company, State Grid Jibei Electric Co., Ltd., Qinhuangdao 066000, China;
2. Southwest Jiaotong University, Chengdu 610000, China

Received:2016-08-15 Online:2016-11-10 Published:2016-12-09

摘要/Abstract

摘要： 对于电网故障下双馈感应发电机（doubly fed induction generator,DFIG）机电能量失衡即风力机输入双馈电机能量和双馈电机输出至电网侧能量失衡的问题,现有文献鲜少涉及。双馈电机输出能量和机侧变换器的励磁控制策略有关,首先对现存几种励磁控制策略下双馈电机输出有功功率的情况进行分析,结果表明现有励磁控制策略下双馈电机无法达到机电能量平衡。进而从任意频率、幅值、相位转子电流入手,探讨转子电流三要素和双馈电机输出有功功率之间的关系,推导了使双馈电机达到能量平衡所需的转子电流指令。利用Matlab/Simulink搭建了系统的仿真电路,验证了以上推导过程的正确性。

关键词: 风电, 低电压穿越, 双馈感应发电机, 机电能量平衡, 励磁控制策略

Abstract: The paper introduces the energy imbalance problems of doubly-fed induction generator(DFIG) under grid faults, which occurs between the input energy of the wind turbine and the output energy of DFIG connected to the power grid. No literature has covered them yet until present. The output energy of DFIG is related to the excitation control strategy of rotor side converter. Firstly, an analysis is made on the output active power of DFIG under existing excitation control strategies, which shows that the DFIG electromechanical energy balance cannot be achieved under the existing excitation control strategy. Then, based on an analysis on the relation between the output active power of DFIG and the three major factors of rotor current, including the amplitude, frequency and phase of rotor current, the rotor current command is deduced to achieve the electromechanical energy balance of DFIG. A simulation circuit system is developed by using Matlab/Simulink, which verifies the correctness of the above deduction process.

Key words: wind power, low voltage ride through, doubly fed induction generator, electromechanical energy balance, excitation control strategy

中图分类号:

TM614

王珂, 王新霞, 焦东翔, 张鹏, 魏新宇. 故障下双馈风电系统机电能量平衡的可行性分析[J]. 中国电力, 2016, 49(11): 94-99.

WANG Ke, WANG Xinxia, JIAO Dongxiang, ZHANG Peng, WEI Xinyu. Feasibility Analysis on Energy Balance of Doubly-Fed Wind Power Systems Under Grounding Faults[J]. Electric Power, 2016, 49(11): 94-99.

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https://www.electricpower.com.cn/CN/Y2016/V49/I11/94

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故障下双馈风电系统机电能量平衡的可行性分析

Feasibility Analysis on Energy Balance of Doubly-Fed Wind Power Systems Under Grounding Faults

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故障下双馈风电系统机电能量平衡的可行性分析

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