风电接入对配电网电流保护的影响研究  

Study on Influence of Wind Power Access to Current Protection of Distribution Network

作　　者：宋绍剑[1] 徐覃萍 廖碧莲[1] 

机构地区：[1]广西大学电气工程学院,广西南宁530004

出　　处：《计算机仿真》2015年第1期137-142,共6页Computer Simulation

基　　金：广西教育厅科研项目(201106LX012);广西大学科研基金项目(XJZ110602)

摘　　要：风电接入会改变原来配电网的结构以及故障电流的大小、方向等,进而影响配电网阶段式电流保护的正确动作。针对这个问题,首先分析变速恒频双馈风力发电机的数学模型以及控制策略,在RTDS/RSCAD下对其运行特性进行仿真研究,并建立了包含双馈风力发电机的10k V配电网仿真模型。通过仿真分析对原有电流保护的影响,改变风电的接入容量做进一步实验。仿真结果表明,风电接入配电网后,线路的电流保护的动作与风电的接入容量以及故障位置直接相关。Access of the wind power will change the original structure of distribution network and fault current＇ s magnitudes, direction and so on, and then it may affect the correct action of stage current protection of distribution network. To this problem, at first, the paper analysed the mathematical model and control strategy of VSCF doublyfed wind power generator, and stimulated of its operating characteristics on the RTDS/RSCAD. The detail of doublyfed wind power generation of 10 kV distribution network system model was established, and through the model simulation and analysis of the effect on the original protection, the further experiments were carried out fwith the different access capacities of wind power. The result of simulation shows that the action of current protection relates to the access capacity of wind power and fault location directly.

关 键 词：双馈风力发电机 配电网 电流保护 实时数字仿真仪 

分 类 号：TM743[电气工程—电力系统及自动化]