±500kV高压直流输电线路电磁环境影响评估  

Electromagnetic Environmental Influence of ±500kV HVDC Transmission Line

作　　者：陈聪 

机构地区：[1]广东天联电力设计有限公司,广东广州510670

出　　处：《机电工程技术》2016年第4期120-125,共6页Mechanical & Electrical Engineering Technology

摘　　要：高压直流输电线路电磁环境问题已经成为我国直流电网建设的制约因素之一,分析了可听噪声、无线电干扰和电场干扰这几种直流输电线路电磁环境干扰的影响,包括对干扰限值、干扰特性和克服措施的研究,并评估了海拔高度的影响。可听噪声影响由BPA公式计算,无线电干扰由CISPR公式计算,电场干扰由迎风差分算法行计算。结果表明,对于±500 k V高压直流输电线路,海拔高度小于1 000 m,电场干扰对导线选型起控制作用,可听噪声和无线电干扰不起控制作用;海拔高度超过1 000 m,可听噪声、无线电干扰和电场干扰随海拔高度的增加而增加,此时电磁环境影响评估必须考虑可听噪声和无线电干扰的影响。The electromagnetic environmental influence of HVDC has become the constraints of the construction of DC power grid in ourcountry. The influence of several electromagnetic environmental interferences,i.e.,audible noise,RIV,electric field interference,isanalyzed in this paper. The interference limits,interference characteristics and suppression measures were investigated,in addition,theinfluence of altitude was assessed. While audible noise was calculated with BPA formula, RIV was formulated with CISPR formula,moreover,the upwind difference algorithm was proposed to evaluate the influence of electric field interference. The results show that for ±500 HVDC transmission line,if altitude is lower than 1000 m,electric field interference plays a control role in the selection of the line,and however,audible noise and RIV do not function. On the other hand,if altitude is higher than 1000 m,audible noise,RIV,andelectric field interference increase with altitude increases, therefore, the influence of audible noise and RIV must be taken intoconsideration in this case.

关 键 词：高压直流输电 电磁环境 可听噪声 无线电干扰 电场干扰 迎风差分算法 

分 类 号：TM7[电气工程—电力系统及自动化]