电网故障下含DFIG的风电场暂态电流特性分析  

Transient Current Characteristic Analysis of Wind Farm Containing DFIG Under Grid Fault

作　　者：张谦[1,2] 李凤婷[1] 蒋永梅[1] 

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830047 [2]国网浙江电力公司舟山供电公司,浙江舟山316000

出　　处：《电力电容器与无功补偿》2017年第2期166-171,共6页Power Capacitor & Reactive Power Compensation

基　　金：国家自然科学基金项目(51267019;51467019)

摘　　要：风电场故障特性是其保护整定与配置的重要依据之一。在阐述双馈风电机组数学模型构建过程的基础上,建立了双馈风电机组提供的短路电流表达式和风电场联络线接地故障短路电流表达式,量化分析了诸如Crowbar控制策略、风电机组并网数目、风电机组运行风速、无功补偿等因素对该短路电流的影响;进一步,在分析风电场主要保护配置及其特征的基础上,推导与分析了上述短路电流及其主要影响因素对风电场配置的主要保护的影响。最后,以新疆某1.5MW风电场为背景,基于PSCAD/EMTDC平台仿真验证了上述理论分析的正确性。The fault characteristic of wind farm is one of the important evidence for its protection setting and configuration. On the basis of describing the set up process of FDIG mathematical model, the exp- ression of short circuit current and supplied by the FDIG and expression of earthing fault short circuit current of wind farm connection line are set up, the influence of such factors as Crowbar control strategy, interconnection number of wind turbine generator,operation wind velocity of wind turbine and reactive power compensation etc. are quantitatively analyzed;on the basis of analyzing main protection configu- ration and its features of wind farm, the influence of above short circuit current and its main influence factor on the main protection of wind farm configuration are derived and analyzed. Finally, the correctness of above theoretical analysis based on PSCAD/EMTDC platform is simulated and verified with certain 1.5 MW wind farm in Xinjiang as background.

关 键 词：双馈风电机组 保护配置 故障特性 影响因素 

分 类 号：TM614[电气工程—电力系统及自动化]