Recently , people pay more and more attention to the biological effect of the electromagnetic field ( emf ) caused by the ehv transmission line to the health of human 近来，超高压输电线产生的工频电磁场的生物效应对人类健康的影响愈来愈引起人们的重视。
The iced insulators flashover is one of the main faults of the ehv transmission lines in icing regions . icing is especial form of pollution 对覆冰地区的超高压线路，绝缘子覆冰引起的闪络已经成为最主要的故障之一，对电力系统的安全运行造成了极大的威胁。
It is the conclusion that the heat absorbed by human body is too small to cause the thermal hurt to human under the present ehv transmission line in our country 研究表明，在我国现有的超高压输电线路下，人体所吸收的能量很小，因此从热效应方面看不足以对人造成伤害。
This paper studies the safety of the biological effect of the ehv effect by calculating the emf distribution in human body , and gets some theoretical and actual conclusions 本文通过计算人体内电磁场分布的方法，研究了超高压输电线生物效应的安全性，得出一些具有理论和实际意义的结论。
The reliability of hv / ehv transmission line protection is important to the security of the power system . this thesis is devoted in the study of the transient current protection for hv / ehv transmission line 探索新的保护原理和方法，以提高输电线路保护的性能，是继电保护研究领域中的一个重要课题。
With the rapid development of the power cause , the voltage degree of the power transmission increases continually , the extra - high voltage ( ehv ) and ultra - high voltage ( uhv ) transmission lines appear in succession 随着电力事业的快速发展，输电电压的等级不断提高，相继出现超高压和特高压输电线路。
According to the environmental and medical reports , associating to th e safety criteria and test results , comparing with the calculating results , the paper studies the relation between the ehv transmission line and human health 根据环境和医学方面的研究报告，结合相应的安全标准和实验结果，对照计算结果，分析了超高压输电线与人类健康的关系。
In order to compensate for the capacitive charging power of transmission lines , control reactive power flow , stabilize operating voltage and restrict arc current , the shunt reactors are usually installed on ehv transmission lines , especially for uhv transmission lines 摘要超、特高压输电线路为了补偿线路的容性充电功率，控制无功潮流，稳定网络运行电压，限制潜供电流等，一般要安装并联电抗器。
In order to avoid the ehv system disaster caused by reclosing on the permanent fault of transmission line , adaptive autoreclosure based on microprocessor - based protection arises at the historic moment , but is still in the stage of theory study 为了避免超高压输电线路采用自动重合闸时重合于永久性故障所造成系统稳定破坏等重大系统灾难，在微机保护的基础上，自适应重合闸应运而生，但尚处于理论探索阶段。
The paper summarizes the method to calculate the emf near the power transmission line by analytic method , calculates the distribution of the emf in human body and the energy absorbed by human under the ehv power transmission line using a mix of numerical and analytic method 总结了现有的解析法计算输电线周围电磁场的方法，采用一种解析法和有限元法相结合的计算方法，利用ansys电磁场分析软件计算了超高压输电线下人体内电磁场的分布和人体吸收的能量。
