Study On The Influence Of AC Traction Network For Inspection And Repair Operation Of Power Transfixion Line

With the continuous development of our country's society and the continuous growth of the national economy,the electrified railway industry has entered a stage of rapid development.with the continuous improving in speed and increasing in load,reliability and safety requirements are even higher.In our country,thre e-phase 10kV power transfixion line overhead lines or underground cable lines are generally set up alongside electrified railways,which provides power for stations,signals,power,and lighting facilities along the railway line.When the traction power supply system is powered live,a huge electromagnetic system is formed around it,and when performing maintenance work on the power transfixion line,if the safety measures are improperly used,the induction power will seriously injure the maintenance personneLTherefore,the study of safe,effective,scientific and practical preventive measures is an important issue in the field of railway power supply security.At present,there are many theoretical researches on induction electricity at home and abroad,but it has not been combined with the actual situation to analyze,calculate,guide and apply to engineering practice.The studies on through current are limited to concepts,hazards,and preventive measures,and the study of characteristics,characteristics and distribution laws is very little and simple.This paper conducts research on these aspects in-depth,and quantitatively calculates the inductive current and through current,it also provides reference for future research in related fields.At the same time,it analies the influence of the AC traction network on the maintenance of adjacent power lines,which has economic and social significance for ensuring the safety of operatior and ensuring the safe and smooth operation of electrified railways and power lines.The dissertation," Study on the Influence of AC Traction Network for Inspection and Repair Operation of Power Transfixion Line " originates from the research project of the Kunming Railway Bureau in 2017,"study on electrified railway crossing current".This paper analyzes the reasons of electric current wounding incident during the process of the maintenance of power transfixion line,and studies the electromagnetic influence mechanism of electrified railways has upon adjacent power transfixion line.Meanwhile,researches the calculation of electrostatic induction voltage,electromagnetic induction potential,induction current and crossing current,and gives the main cause of the accident.The induction electricity in the 811 induction electric injury event in the Kunming power supply segment was calculated,and the calculated results were compared with the field measured data to verify the validity of the electromagnetic induction calculation.Then,write electromagnetic induction calculation software based on VC++6.0,which can abilityto calculateinduction electricity in a timely manner in combination with actual maintenance,actually determine the magnitude of voltage and current induced in the overhauled power transfixion line under the interference of AC traction network,and take corresponding preventive measures,mainly to takes measures of grounding seal line at both ends of the maintenance point,and gives the best grounding sealing line distance by quantitative calculation.However,after the grounding seal line of the two ends,it involves the problem of breakpoint operations,then I analyzes breakpoint operations.Through the quantitative calculation to determine its dangerous zone,take the grounding seal line to reduce the induced voltage to the safe voltage range,that is to improve work efficiency,while ensuring the safety of operators.This article provides a scientific basis for assessing the induction electricity intensity of the maintenance section of power transfixion lines(and similar overhead lines),and scientifically formulating measures to prevent induction electricity from harming maintenance personnel in actual production,which is of great significance for ensuring production safety.