考虑互感器传变特性的输电线路暂态保护雷击干扰与线路故障识别方法

发布时间：2018-07-08 16:43

本文选题：CVT + 二次侧输出　；参考：《电工技术学报》2015年03期

【摘要】：当雷击线路或杆塔未导致故障时,线路上的行波响应仅包含雷电等效激励源造成的响应,不包含故障激励源引起的响应,而接地故障引起的行波响应包含故障等效电源接入传输系统的过程。本文以实测CVT与CT宽频传输特性为基础,建立CVT与CT传递模型,分析CVT二次侧输出包含的附加振荡对行波识别与标定的影响。以CVT与CT二次侧输出波形作为样本数据,利用瞬时功率对故障行波进行刻画,通过主成分分析聚类的方法,将故障与雷击干扰的瞬时功率曲线簇投影至主成分分析坐标系上。故障与雷击干扰的行波数据会在坐标系上形成各自的聚类点簇中心,利用支持向量机划分分类面,对故障与雷击干扰进行判别。大量数据测试表明,该雷击干扰识别方法对故障与雷击干扰的分类可行、有效。
[Abstract]:When the lightning circuit or pole tower does not cause a fault, the traveling wave response on the line contains only the response caused by the lightning equivalent excitation source, does not contain the response caused by the fault excitation source, and the traveling wave response caused by the grounding fault includes the process of connecting the fault equivalent power to the transmission system. This paper is based on the measured CVT and the CT broadband transmission characteristics as the basis for the establishment of C The VT and CT transfer models are used to analyze the influence of the additional oscillation on the traveling wave recognition and calibration of the two side output of CVT. The two side output waveforms of CVT and CT are used as sample data and the instantaneous power is used to depict the fault traveling wave. The instantaneous power curve cluster of the fault and the lightning interference is projected to the main component by the method of principal component analysis and clustering. In the analysis coordinate system, the traveling wave data of the fault and the lightning interference will form the cluster center of each cluster in the coordinate system, and use the support vector machine to divide the classification surface and distinguish the fault and the lightning interference. A large number of data tests show that the classification of the lightning interference interference is feasible and effective.
【作者单位】：昆明理工大学电气工程学院;云南民族大学;哈尔滨工业大学电气工程及自动化学院;
【基金】：国家自然科学基金(U1202233;51267009) 云南省重点项目(2011FA032) 高等学校博士学科点专项科研基金(20105314110001)资助项目
【分类号】：TM75

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