电工技术学报  2017, Vol. 32 Issue (22): 216-224    DOI: 10.19595/j.cnki.1000-6753.tces.160823
电力系统及其自动化 |
低电压穿越控制下双馈风电机组短路电流特性与计算方法
欧阳金鑫1, 唐挺1, 郑迪1, 任文君1, 熊小伏1, 钟家勇2
1. 输配电装备及系统安全与新技术国家重点实验室(重庆大学) 重庆 400030。
2. 国网重庆市电力公司电力科学研究院 重庆 401121
Characteristics and Calculation Method of Short-Circuit Current of Doubly Fed Wind Generator under Lower Voltage Ride Through
Ouyang Jinxin1, Tang Ting1, Zheng Di1, Ren Wenjun1, Xiong Xiaofu1, Zeng Jiayong2
1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400030 China。
.2. Chongqing Electric Power Research Institute State Grid Chongqing Electric Power Company hongqing 401123 China
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摘要 双馈风电机组(DFIG)的规模化应用使得电力系统的故障特性发生了变化,极大制约了电力系统继电保护的实施。针对现有研究未计及低电压穿越(LVRT)措施对DFIG故障特性的影响问题,对低电压穿越控制下DFIG的短路电流进行研究,重点考虑DFIG无功功率输出通过改变机端电压对机组故障输出特性的影响。着眼于DFIG定转子绕组反应、变换器LVRT控制的相互耦合,通过构建LVRT控制下的DFIG矢量模型,导出了LVRT控制启动前和启动后的DFIG短路电流表达式,从无功功率输出和LVRT控制启动延时两个方面分析LVRT控制对DFIG短路电流的影响,建立LVRT控制启动前和启动后的DFIG故障等效模型,提出考虑LVRT控制影响的DFIG并网系统短路电流的计算方法。
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欧阳金鑫
唐挺
郑迪
任文君
熊小伏
钟家勇
关键词 风力发电双馈风力发电机组短路电流故障分析低电压穿越    
Abstract:The fault characteristics of power system is being changed by the large-scale application of doubly fed induction generator (DFIG) in wind generation. Thus, the relay protection of power system is restricted. Many researches on fault characteristics of DFIG have been conducted, but the influence of low voltage ride through (LVRT) was excluded. This paper studies the short-circuit current contributed by DFIG under LVRT control, with the emphasis on the effects of reactive power on terminal voltage. The coupling mechanism between the winding reaction and LVRT control is taken into account. The expressions of short-circuit currents before and after the LVRT control were presented by constructing the vector model of DFIG operated with LVRT control. The influence on short-circuit caused by the reactive power and its trigger time under LVRT control was analyzed. The equivalent models of DFIG before and after LVRT control were then built. Finally, the calculation method of short-circuit current of a doubly-fed wind power system was proposed.
Key wordsWind    generation,    doubly    fed    induction    generator    (DFIG),    short-circuit    current,    fault    analysis,    lower    voltage    ride    through    (LVRT)   
收稿日期: 2016-06-02      出版日期: 2017-12-05
PACS: TM744  
基金资助:国家自然科学基金(51407017)、重庆市基础与前沿研究计划(cstc2015jcyjA90016)和中央高校基本科研业务费专项资金(106112015CDJXY150001)资助项目
通讯作者: 唐挺 男,1995年生,硕士研究生,研究方向为电力系统保护。E-mail: 1204068430@qq.com。   
作者简介: 欧阳金鑫 男,1984年生,博士,副教授,研究方向为新能源电力系统分析、保护与控制。E-mail: jinxinoy@163.com。
引用本文:   
欧阳金鑫, 唐挺, 郑迪, 任文君, 熊小伏, 钟家勇. 低电压穿越控制下双馈风电机组短路电流特性与计算方法[J]. 电工技术学报, 2017, 32(22): 216-224. Ouyang Jinxin, Tang Ting, Zheng Di, Ren Wenjun, Xiong Xiaofu, Zeng Jiayong. Characteristics and Calculation Method of Short-Circuit Current of Doubly Fed Wind Generator under Lower Voltage Ride Through. Transactions of China Electrotechnical Society, 2017, 32(22): 216-224.
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