摘要
结合含DG配电网的网络结构图与对称分量法,研究出一种相电流差故障分量作为保护动作判据的算法,相电流差故障分量的获取可由采集故障后数据与故障前数据并通过计算得到,该方法实用,能够准确识别保护区内外的故障。并在MATLAB平台上搭建了含风机的配电网模型,进行了仿真验证。仿真结果证明该算法准确识别保护区内外的故障,能减小分布式电流接入配电网后对其电流保护产生的影响。
Combined with network structure diagrams and the symmetrical component method of distribution network with DG, an algorithm is developed. In the algorithm, the fault component of phase to phase current difference is used as a judgement whether a protection acts and can be computed with connected post-fault datas and pre-fault datas. The algorithm is applicable and can identificate the fault in or out of the protection area accurately. A distribution network model with wind turbine is built in MATLAB to conduct a simulation and verify the algorithm. The simulation results show the algorithm＇s accurate identification and ability of reducing of the impact to current protection with the access of distributed current to distribution network.
出处
《江苏电机工程》
2012年第5期45-48,共4页
Jiangsu Electrical Engineering
关键词
分布式电源
配电网
自适应保护
故障分量
distributed power
distribution network
self-adaptive protection
fault component
