输电线路雷电流测量用电流互感器应用研究

发布时间：2018-07-06 15:29

本文选题：雷电流 + 罗氏线圈　；参考：《华北电力大学》2017年硕士论文

【摘要】：输电线路因遭受雷击产生的线路跳闸事故为电力系统运行中的主要故障。雷电参数的准确测量是研究雷电特性、分析雷击事故原因的前提,在电网防雷设计中具有非常重要的作用。本文的主要研究工作包含以下几个部分:(1)首先,对架空输电线路雷电流波形的特征展开研究,对测量雷电流波形的传感器罗氏线圈的原理以及分类进行了理论分析,对罗氏线圈的传递函数及其等效电路模型进行推导,分析了传统自积分式罗氏线圈测量雷电流产生误差的原因,提出对传统自积分式罗氏线圈进行校正的必要性。(2)接着,根据自积分式罗氏线圈公式推导和仿真结果,分别提出模拟积分和数字积分两种校正方法,并由此设计了新型模拟积分器,对系统误差进行理论分析和相关试验;同时提出基于辛普森算法的数值积分校正方法,对校正效果进行分析。(3)最后,将两种校正型自积分式罗氏线圈应用于输电线路雷击定位在线监测系统工程现场,比对两种校正方案的工程应用中的优缺点和适用场合。
[Abstract]:Transmission line tripping caused by lightning strike is the main fault in power system operation. The accurate measurement of lightning parameters is the premise to study the lightning characteristics and analyze the causes of lightning accidents. It plays an important role in the lightning protection design of power network. The main research work of this paper includes the following parts: (1) firstly, the characteristics of lightning current waveform of overhead transmission lines are studied, and the principle and classification of the sensor Roche coil for measuring lightning current waveform are analyzed theoretically. The transfer function of Roche coil and its equivalent circuit model are deduced, and the reason of the error caused by the traditional self-integral Roche coil in measuring lightning current is analyzed. The necessity of correcting the traditional self-integral Roche coil is put forward. (2) then, According to the derivation and simulation results of the self-integral Roche coil formula, two correction methods, analog integral and digital integral, are proposed, and a new analog integrator is designed. The system error is theoretically analyzed and tested. At the same time, a numerical integral correction method based on Simpson algorithm is proposed to analyze the correction effect. (3) finally, two kinds of self-integrated Roche coils are applied to the project site of on-line monitoring system for lightning strike location of transmission lines. Compare the advantages and disadvantages of the two correction schemes in the engineering application and the applicable situation.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM452

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