基于PSCAD/EMTDC并网异步风电场短路特性的仿真分析  

PSCAD/EMTDC-Based Simulation on Short-Circuit Characteristics of Wind Farm Interconnected Grid

作　　者：苏常胜[1] 李凤婷[1] 

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830047

出　　处：《水力发电》2010年第10期89-92,共4页Water Power

基　　金：国家自然科学基金资助项目(50967004);新疆维吾尔自治区教育厅重点资助项目(XJEDU2007i10);<电力系统及发电设备控制和仿真>国家重点实验室开放项目(SKLD09KZ01)

摘　　要：由于风速和风向的变化具有随机性、间歇性,风机组的输出功率与风速的3次方成正比,因此风力发电机输出功率的短周期变化比较明显,风机的运行方式多变,不同情况下故障时的短路特性也相差很大。针对异步风电场建立了风电场联络线路接地故障时,风电场提供的短路电流各序分量表达式,分析了影响风电场故障特性的主要因素,并以PSCAD/EMTDC为平台建立并网风电场的动态仿真模型,仿真分析了风电场投入机组数、风速、故障类型、电抗与电阻之比对故障特性的影响,仿真结果与理论分析一致。As the nature stochastic and intermittent of wind speed and direction and the power output proportional to the cube of wind speed, the output variation of wind generator often fluctuates in a short period and the short-circuit characteristic is different. For a constant-speed induction wind farm, the main factors that influence the short-circuit characteristic of connecting line ground faulty were analyzed by the sequence current model. A simulation model was also established based on the PSCAD/EMTDC platform, and the influences of generating capacity, wind speed, ground faulty type and the ratio of reactance and resistance of connecting line on short-circuit characteristic were simulated. The simulation results are consistent with the theoretical analysis.

关 键 词：仿真分析 短路特性 风电场 异步发电机 

分 类 号：TM614[电气工程—电力系统及自动化]