电力系统自动化2011，Vol.35Issue(21)：110-115,6.
高压直流输电入地电流在交流电网分布的仿真分析
Simulation and Analysis of HVDC Earth-return Current＇s Distribution in AC Power Grid
摘要
Abstract
DC bias of neutral-earthing transformers is caused by earth-return current of high voltage direct current（HVDC） transmission.Using the data of power flow calculations and by building the mathematical model,computer aided analysis of DC distribution can be carried out.This approach is introduced to obtain the DC distribution and DC restrain measure of Chu-Sui ultra HVDC transmission of Guangdong power grid.Through the study,the rules of DC distribution in some random virtual power grids can be obtained.It can be concluded that more DC distribution will be resulted with larger scale power grid and more geographically concentrated distribution substations.Errors between the calculation and realistic measurement are caused by the errors in resistances of transformer windings and neutral reactor.It is observed that DC distribution of 220 kV networks is affected by the neutral-earthing 110 kV networks,but this is not the case for 500 kV systems.Utilizing neutral braking measure will lead to increment of DC distribution in local power grid,but the total amount will be reduced. This work is supported by Special Fund of the National Basic Research Program of China（No.2009CB724500）.关键词
高压直流输电/直流偏磁/直流分布/电网络分析/仿真评估Key words
high voltage direct current（HVDC） transmission/DC bias/DC distribution/electric networks analysis/simulation evaluation分类
信息技术与安全科学引用本文复制引用
潘卓洪,张露,谭波,梅桂华,文习山..高压直流输电入地电流在交流电网分布的仿真分析[J].电力系统自动化,2011,35(21):110-115,6.基金项目
国家重点基础研究发展计划（973计划）资助项目 （）
