基于有限元法和模拟电荷法的高压输电线路工频电场研究

Research on Power Frequency Electric Field of High Voltage Transmission Lines Based on Finite Element Method and Simulated Charge Method

为更好地研究高压输电线路工频电场效应在不同气象条件下的变化规律,运用有限元法和模拟电荷法,结合高压输电线下工频电场相关理论知识,在高压输电线路下,分析车辆对人体的电击效应。首先,对人体的暂态电击电流峰值、暂态放电能量和稳态电击电流进行精确计算。其次,应用有限元法,仿真和分析小型车对人体所产生的暂态电击电流峰值以及暂态放电能量,并比较最终仿真结果。结果表明:理论计算值与仿真分析值之间存在10%左右的误差,当人所处的电场强度为5~10kV/m,且接触小型车时,由于该场强没有超出人体的疼痛阈值,人体仅仅出现触电感觉,不会危及人体生命安全。高压输电线路工频电场场强低于人体疼痛阈值,安全可靠,并不会对人体造成生命危险。该研究成果能够为相关人员提供有益的借鉴和参考。

In order to better study the variation law of power frequency electric field effect on high-voltage transmission lines under different meteorological conditions,finite element method and simulated charge method are used,combined with relevant theoretical knowledge of power frequency electric field under high-voltage transmission lines,to analyze the electric shock effect of vehicles on human body under high-voltage transmission lines.Firstly,accurately calculate the peak transient electric shock current,transient discharge energy,and steady-state electric shock current of the human body.Secondly,apply the finite element method to simulate and analyze the peak transient electric shock current and transient discharge energy generated by small cars on the human body,and compare the final simulation results.The results indicate that:there is an error of about 10%between the theoretical calculation value and the simulation analysis value.When a person is in an electric field strength of 5-10kV/m and comes into contact with a small car,as the field strength does not exceed the pain threshold of the human body,the human body only experiences a feeling of electric shock,which does not endanger human life safety.The power frequency electric field strength of high-voltage transmission lines is lower than the human pain threshold,which is safe and reliable and does not pose a risk to human life.Hope that the research results can provide useful reference and guidance for relevant personnel.