电力勘测设计Issue(z1)：99-104,135,7.
特高压直流输电接地极大地电阻率测试研究
Study On Testing of Soil Resistivity at Earth Electrode Site of UHVDC Transmission Line
摘要
Abstract
An earth electrode helps to make up the current circuit in the earth when the transmission line works with single phase, so it plays an important role in the safe operation of the transmission line. The accurate and reliable data on soil resistivity data is required for design and calculation of an earth electrode. Especially, after the magnetic biasing alarm events of Xiluodu-Zhexi ±800kV UHVDC project and Jinping-Sunan±800kV UHVDC project, dependable data of soil resistivitybecomes more and more important. To provide parameter values for designer, we put forward a combination of geophysics methods based on the analysis of the advantages and disadvantages of those methods. The main idea of the combination is using symmetric quadrupole sounding method for prospecting the electrical distribution of 300m deep rock and soil mass, using CSAMT for 3000m depth prospecting, and using MT for 3km ~ 50km depth prospecting. We applied the combination to several UHVDC projects. The combination’s operability and effectiveness are tested in practice, meanwhile it is relatively economic.关键词
特高压/直流输电/接地极/大地电阻率/物探Key words
UHV/HVDC transmission/earth electrode/soil resistivity/geophysics methods分类
天文与地球科学引用本文复制引用
严文根,高倚山,张建龙,胡钧..特高压直流输电接地极大地电阻率测试研究[J].电力勘测设计,2015,(z1):99-104,135,7.
