基于合成场强仪的输电工程地面合成电场研究  

Study of Ground Synthetic Electric Field in Transmission Project Based on Synthetic Field Intensity Meter

作　　者：张小庆 洪倩 丰佳 胡笳 林旗力[4] ZHANG Xiaoqing;HONG Qian;FENG Jia;HU Jia;LIN Qili(East China Electric Power Design Institute Co.,Ltd.,CPECC,Shanghai 200001,China;State Grid Economic Research Institute Co.,Ltd.,Beijing 102209,China;State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310007,China;College of Environmental&Resource Sciences,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]中国电力工程顾问集团华东电力设计院有限公司,上海200001 [2]国网经济技术研究院有限公司,北京102209 [3]国网浙江省电力有限公司,浙江杭州310007 [4]浙江大学资源与环境学院,浙江杭州310058

出　　处：《自动化仪表》2024年第1期91-95,共5页Process Automation Instrumentation

基　　金：国家电网有限公司总部科技基金资助项目(5200-202056453A-0-0-00)。

摘　　要：高压直流(DC)输电线路交叉跨越是我国特高压(UHV)技术发展中出现的问题。由于两回DC线路相互影响,交叉跨越区域内合成电场呈复杂的三维分布,UHV DC输电工程地面合成电场计算较为困难。选取典型±800 kV UHV DC输电工程进行地面合成电场的实测研究。参照GB 39220—2020,采用HDEM-01合成场强仪进行野外现场实测。测量参数为有效期内的场磨传感器上积聚的电荷量。测量结果与运行初期实测数据的对比结果表明:±800 kV换流站周边运行初期合成电场强度略低于后期,且整体水平较低;沿线电磁环境敏感目标运行初期、后期的实测数据中,74%的数值小于5 kV/m。通过此次研究,明确了UHV DC输电工程合成电场不同时期的特性。该研究有助于推进UHV DC输电工程的快速建成,并提高其运行安全性,从而推动电力工程建设的发展。Cross-crossing of high-voltage direct current(DC)transmission lines is a problem in the development of China’s ultra-high voltage(UHV)technology.Due to the mutual influence of the two DC lines,the synthetic electric field in the crosscrossing area is a complex three-dimensional distribution,and it is difficult to calculate the synthetic electric field on the ground of the UHV DC transmission project.A typical±800 kV UHV DC transmission project is selected to carry out the ground synthetic electric field measurement study.Referring to GB 39220—2020,HDEM-01 synthetic field strength meter is used for field measurement.The measured parameter is the amount of charge accumulated on the field mill sensor during the validity period.Comparison of the measurement results with the measured data at the early stage of operation shows that:the synthetic electric field strength at the early stage of operation around the±800 kV converter station is slightly lower than that at the later stage,and the overall level is lower;74%of the measured data at the early and later stages of operation of the sensitive targets of the electromagnetic environment along the line is less than 5 kV/m.Through this study,the characteristics of the synthetic electric field at different periods of the UHV DC transmission project have been clarified.The study contributes to advance the rapid completion of the UHV DC transmission project and improve its operational safety,thus contributing to the development of power engineering construction.

关 键 词：直流输电工程 地面合成电场 特高压电网 分布特征 电磁环境 本底值 换流站 

分 类 号：TH39[机械工程—机械制造及自动化]