Study On Fault Location Technology Of 10kV Cable

In recent years,due to the 10 kv power distribution network is becoming more and more intensive,cable line because it has strong adaptability,supply high efficiency,good concealment and other advantages,has been widely used,with the people's power boost,increasing the load of power supply network utilization,benxi for cable fault point addressing technology research has become the primary task of the power grid workers.At present,the main difficulty of cable fault point addressing and maintenance is that the cable line is underground,and there are higher requirements for finding the precise location of the fault point.Through the analysis of the current main cable fault point addressing technology,it is found that there is still no widely applicable and accurate cable fault point addressing method.Therefore,it is particularly important to maintain the stable operation of power supply network,people's normal life and work,strengthen the wide applicability and easy operation of cable fault point addressing technology.Is introduced in this paper about the cable fault point of addressing technology research and the status quo of both at home and abroad,according to the actual needs and application,and summarize the conventional cable fault point of addressing the main steps and experiences,try to introduce the second pulse method of addressing technology basis and method,and the second pulse method for fault location addressing technology advantages and disadvantages are analyzed.In addition,the common problems encountered in the addressing process of 10 k V cable faults are summarized and analyzed.The cable faults are classified according to the cable line structure and each important parameter,and the dominant characteristics of the fault points in different cable lines are studied based on their characteristics,so as to compare the problems.This paper attempts to analyze and summarize the characteristics and principles of different detection methods,and compares the common cable fault detection and positioning techniques.This paper summarizes the process and steps of cable line fault addressing,and provides technical basis for cable fault detection.This paper covers the basic theory of model establishment and equal-distribution parameter equivalent circuit model of long line transmission line and cable line.According to the current cable fault addressing technology background and technology,provide the basis for the later design.Cable fault point addressing system is introduced in this paper the design of the overall composition and related modules,with the aid of input and output control module to complete the impact current signal of each parameter adjustment,the impact of the current signal parameters such as cycle,pulse width,frequency,can take advantage of this system reflects the impact of the current signal receiving module is shown.The reflected impulse current signal is input into the computer for calculation,and then the reflected signal can be deeply processed by the post-processing program of the computer.This paper mainly studies the development direction and technical means of 10 k V cablefault addressing technology,and mainly analyzes the wavelet noise reduction,high voltage pulse method and secondary pulse method,so as to determine the practical functions of the parameters such as the period,pulse width and frequency of the impulse current signal output from the system and reflected impulse current signal.For 10 kv cable fault problem addressing accuracy analysis and the simulation in MATLAB platform,and through the wavelet de-noising theory to addressing the cable technical feedback signal postprocessing steps of analysis and system feedback impact the depth of the current signal processing point,demonstrates the practical problems in the application of addressing algorithm feedback impact current signal analysis of the addressing and feasibility.