文献类型：期刊文献

中文题名：基于全波电流关联性的线路差动保护算法

英文题名：A New Line Differential Protection Principle Based on Correlation of Full Wave Current Data

作者：吴沛锋[1];张国云[2];孔令号[3]

第一作者：吴沛锋

通讯作者：Wu, Peifeng

机构：[1]北京联合大学城市轨道交通与物流学院,北京市朝阳区100101;[2]国网冀北电力有限公司技能培训中心,河北省保定市071000;[3]国网保定供电公司,河北省保定市071000

第一机构：北京联合大学城市轨道交通与物流学院

年份：2019

卷号：43

期号：7

起止页码：2584-2591

中文期刊名：电网技术

外文期刊名：Power System Technology

收录：CSTPCD;;EI(收录号：20193807451423);Scopus(收录号：2-s2.0-85072250275);北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

语种：中文

中文关键词：灰色分析;全波电流;差动保护

外文关键词：gray analysis;full-wave current;differential protection

摘要：灰色关联分析可以判断曲线关联性的紧密程度,故障发生前后,线路两端的全波电流呈现出截然不同的关联性关系,据此定义了故障关联性和非故障关联性,提出了基于全波电流关联性的线路差动保护算法,详细分析了该保护算法的实现过程、抗CT饱和特性、数据窗选择原则、保护动作判据构成方式以及两侧电流数据不同步的影响,并进一步构建分析了基于全波电流故障分量关联性的保护算法,对比分析了2种算法的差异。最后基于软件PSCAD和Matlab搭建了220 kV双端网络模型仿真验证分析,结果表明该保护算法利用故障后5~10ms内的线路两端全波电流数据能够迅速、可靠、正确识别故障情况,得益于故障分量电流的特性,基于全波电流故障分量关联性的保护算法更加灵敏,验证了该保护算法的可行性和有效性。
Grey correlation analysis can analyze and judge relationship between curves. The relationship between the full wave current data at both ends of a line before and after a failure is quite different. Accordingly, the fault correlation and non-fault correlation is defined. A new differential protection principle based on correlation of full wave current data is proposed. Then, action criteria is analyzed about the details of principle, natural anti-CT-saturation capacity, data window selection, the influence of two side current data asynchrony and so on. Furthermore, a protection principle based on the correlation of full wave fault component current is constructed, and the two algorithms are compared and their differences are analyzed. Finally, a 220 kV double-ended network model is constructed with PSCAD and Matlab. Results show that the new differential protection principle can identify internal & external faults quickly and accurately based on the fault data within 5~10 ms. Benefited from the characteristics of the fault component current, the protection principle based on the correlation of full wave fault component current is more sensitive. Feasibility and effectiveness of the protection algorithm are verified.