双极HVDC线路离子流电场计算及影响因素  

Calculation and Influential Factors Analysis of Ionized Electric Field Generated by Bipolar HVDC Transmission Line

作　　者：林秀丽[1] 徐新华[1] 汪大翚[1] 

机构地区：[1]浙江大学环境工程研究所

出　　处：《高电压技术》2007年第10期54-58,共5页High Voltage Engineering

摘　　要：高压直流输电线路运行时电晕形成的独特离子流电场对环境的影响已成为线路设计和环境影响评价的重要内容,而离子流电流密度和电场强度是表征离子流电场的重要特征参数。为此运用解析法计算了地面最大离子流电流密度和最大电场强度分布并分析了导线设计参数对它的影响。研究发现,运行电压较高时,导线高度、极间距是影响离子流电场的主要参数,与美国电力科学研究院的半经验公式法表达的规律一致。HVDC transmission lines have advantages over HVAC in the long distance and bulk-power transmission. Corona occurring on the HVDC transmission lines may produce charges, the charges moving toward the polar zone by the action of the electric field will form the ion current. The ion current density and electric field, which are pre- dominate factors to characterize the ionized field, are he major factors in the design and environmental assessment. The maximum ion current density and electric field were calculated in the paper, and the influence of transmission lines dimension parameters was analyzed. The lines height and the distance of the polar have the significant influence on the ion current density and electric field, which is consistent with the calculation formula introduced by EPRI.

关 键 词：高压直流输电线路 离子流电流密度 电场 解析法 电场强度 导线设计参数 

分 类 号：TM726[电气工程—电力系统及自动化] TM744