特高压直流输电工程受端电网直流偏磁电流分布研究  

Research on DC-Bias Current Distribution of Receiving-End Power Grid in UHVDC Project

作　　者：骆俊 邹国平[1] 何文林 杨仕友[1] LUO Jun;ZOU Guoping;HE Wenlin;YANG Shiyou(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;State Grid Zhejiang Electric Power Research Institute,Hangzhou 310014,China)

机构地区：[1]浙江大学电气工程学院,浙江杭州310027 [2]国网浙江省电力有限公司电力科学研究院,浙江杭州310014

出　　处：《电工技术》2019年第21期36-38,41,共4页Electric Engineering

摘　　要：基于场路直接耦合方法,建立了±800 kV溪浙特高压直流输电工程受端电网的直流偏磁仿真计算模型,通过仿真计算结果与现场测量数据的对比、分析,验证了计算模型的准确性。在此基础上,进一步研究了表层与深层土壤电阻率、站点与直流接地极之间的距离、多台变压器并列运行对直流偏磁电流分布的影响,可为工程交流电网直流电流分布计算及直流偏磁治理提供参考。Based on the field-circuit direct coupling method,a simulation calculation model of DC bias in the receiving-end power grid of the±800 kV Xiliudu-Zhexi UHVDC project is established.The accuracy of the DC bias calculation model is verified by comparing and analyzing the simulation results with the field measurement data.Moreover,the influence of the surface and deep soil resistivity,the distance between the substations and the DC grounding pole,and the parallel operation of multiple transformers on the DC bias current distribution are symmetrically investigated,which can provide reference for the DC current distribution calculation and the DC bias control of the AC grid.

关 键 词：特高压直流 场路耦合模型 直流偏磁 土壤模型 交流电网 

分 类 号：TM72[电气工程—电力系统及自动化]