风力发电机组对称短路特性分析  

Symmetrical short circuit analysis of wind turbine generator

作　　者：关宏亮[1] 赵海翔[2] 刘燕华 王伟胜[2] 戴慧珠[2] 杨以涵[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]中国电力科学研究院新能源研究所,北京100085

出　　处：《电力自动化设备》2008年第1期61-64,共4页Electric Power Automation Equipment

摘　　要：在电力系统分析软件DIgSILENT/Power Factory中建立风电机组及电力系统模型,包括固定转速风电机组和双馈变速风电机组。设置靠近风电场的三相对称短路故障,对风电机组对称短路特性进行理论与仿真分析,比较了不同类型风电机组与相同容量同步发电机组的短路电流波形。以某区域电网为例计算了风电场接入前后其附近母线短路电流,计算风电场接入后使得短路电流增加的百分数,以确定风电场对系统短路电流的贡献。理论分析和仿真结果表明,风电场对并网点附近节点的短路电流有较大影响,在选择风电场附近的电气设备以及对其进行热稳定性校核时,需要考虑风电场对系统短路电流的贡献。The models of the wind turbine generator and power system are established with power system analysis software DIgSILENT/Power Factory,including fixed speed-wind turbine generator and variable- speed wind turbine doubly- fed induction generator（VSWT- DFIG）. The 3- phase symmetrical short circuit fault near wind farm is set for theriotic and simulative study. The short circuit waveforms are compared between wind turbine generators and synchronous generator with same capacity. The short-circuit busbar currents near wind farm are calculated before and after its connection to grid. Its incremental percents is also calculated to evaluate the contribution of wind farm to system short curcuit current. The results demonstrate that the influence of wind farm on the short-circuit current of nearby node must be considered in selecting the electrical devices near wind farm and calculating their thermal stabilities.

关 键 词：风电机组 电力系统 对称故障 短路容量 

分 类 号：TM614[电气工程—电力系统及自动化]