文章摘要
王紫薇,肖繁,王友怀,等.适用于双馈风电场联络线故障选相方法[J].电力系统自动化,2018,42(8):170-176. DOI: 10.7500/AEPS20170313016.
WANG Ziwei,XIAO Fan,WANG Youhuai, et al.Fault Phase Selection Method for Interconnection Line of DFIG-based Wind Farm[J].Automation of Electric Power Systems,2018,42(8):170-176. DOI: 10.7500/AEPS20170313016.
适用于双馈风电场联络线故障选相方法
Fault Phase Selection Method for Interconnection Line of DFIG-based Wind Farm
DOI:10.7500/AEPS20170313016
关键词: 双馈感应发电机  风电场  联络线  故障选相  突变量
KeyWords: doubly-fed induction generator(DFIG)  wind farm  interconnection line  fault phase selection  superimposed
上网日期:2018-03-07
基金项目:国家重点研发计划资助项目(2016YFB0900600);中国南方电网有限责任公司科技项目(QCSG210002-2016B4)
作者单位E-mail
王紫薇 三峡大学电气与新能源学院, 湖北省宜昌市 443002  
肖繁 国网湖北省电力有限公司电力科学研究院, 湖北省武汉市 430077
强电磁与新技术国家重点实验室(华中科技大学), 湖北省武汉市 430074 
xiao103fan@163.com 
王友怀 国网湖北省电力有限公司电力科学研究院, 湖北省武汉市 430077  
张哲 强电磁与新技术国家重点实验室(华中科技大学), 湖北省武汉市 430074  
尹项根 强电磁与新技术国家重点实验室(华中科技大学), 湖北省武汉市 430074  
摘要:
      双馈风电机组复杂的故障电流特性使得应用于双馈风电场联络线上的传统选相元件性能严重劣化,难以满足双馈风电场联络线保护与重合闸的选相需求。根据双馈风电机组的低电压穿越控制策略,分析了传统选相元件应用于双馈风电场联络线面临的缺陷。提出了基于相间电压突变量和相电压突变量幅值比较的故障选相新方法。根据双馈风电场侧保护安装处相电压突变量与相间电压突变量之间的比例关系,构建了故障相别选择系数,并利用故障相别选择系数在不同电网故障类型下的特征,以实现故障选相。仿真结果表明,所提选相元件可以可靠地选出故障相。
Abstract:
      The complicated fault current characteristics of doubly-fed induction generator(DFIG)deteriorate the performance of the conventional superimposed phase selectors when they are applied on the interconnection line of DFIG-based wind farm, which is difficult to satisfy the requirement of phase selection of interconnection line protection of DFIG-based wind farm and reclosing. Based on it, the defects of the traditional phase selectors applied on the interconnection line of DFIG-based wind farm are analyzed according to the low voltage ride through control strategy of DFIG. Then, a new fault phase selector is proposed based on the comparison of superimposed amplitude between phase voltage and line voltage. The selection coefficient of fault phase is established based on the proportional relation of superimposed amplitude between phase voltage and line voltage at the relay location of DFIG-based wind farm. According to the characteristics of the fault phase selection coefficient under different fault conditions, the fault phase selection can be realized. A variety of simulation cases show that the performance of the proposed fault phase selection method is much better than that of conventional method which can select the fault phase effectively.
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