基于新型无接触传感器的输电线路单端组合测距算法

A Single-ended Combined Distance Measurement Algorithm of Transmission Line Based on New Non-contact Sensor

基于新型无接触式传感器,提出了一种单端组合测距方法。新型无接触式传感原理具有成本较低、安装维护简单的显著优点,能够替代传统的行波采集装置,并且弥补了单端组合测距方法的缺点,实现了行波测距和工频量测距的综合利用。此文在此基础上提出了单端组合测距法,基于工频量法的误差规律和行波法的测距精度较高的特点,行波波头辨识范围由工频量法的结果进行选择,减小了实际应用中波头辨识错误的可能。该方法通过利用工频量初步定位结果来消除行波法近区故障死区,改善了行波测距的缺陷,在各种故障情况下均能实现故障定位。PSCAD/EMTDC和Matlab仿真结果表明,该方法不受故障类型和故障发生位置的影响。

Based on the new non-contactsensor,a single-ended combined distance measurement method is proposed.The new non-contact sensor principle has the advantages of low cost as well as simple installation and maintenance.It could replace the traditional traveling wave acquisition device and make up the shortcomings of single-ended combined distance measurement method. The paper proposes the method of single-ended combination sampling ,which is based on the error law of power frequency method and the characteristic of high accuracy of traveling wave method.By utilizing the initial positioning result of the power frequency quantity, the dead area near the traveling wave method is eliminated, the defect of traveling wave distance measurement is improved,and the fault position could be realized under various fault conditions.The simulation results of PSCAD/EMTDC and Matlab show that the method is independent of the type of faults and the location of faults.