流场-离子流场双向耦合作用下±800 kV高压直流输电线路离子流特性  

Characterization of Ion Flow in ±800 kV HVDC Transmission Line Under Bidirectional Coupling of Flow Field and Ion Flow Field

作　　者：康永强 蒲绪宏 张嘉琳 赵珊鹏 陈智涛 马钟任 耿林博 李帅兵 KANG Yongqiang;PU Xuhong;ZHANG Jialin;ZHAO Shanpeng;CHEN Zhitao;MA Zhongren;GENG Linbo;LI Shuaibing(School of New Energy and Power Engineering,Lanzhou Jiaotong University,Lanzhou 730070,Gansu Province,China;School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,Gansu Province,China)

机构地区：[1]兰州交通大学新能源与动力工程学院,甘肃省兰州市730070 [2]兰州交通大学自动化与电气工程学院,甘肃省兰州市730070

出　　处：《中国电机工程学报》2024年第22期9087-9098,I0033,共13页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：国家自然科学基金项目(地区科学基金项目)(52067014)。

摘　　要：高压直流输电线路离子流计算是输电线路设计及电磁环境评估的重要内容,线路电晕放电离子流与流体之间的双向耦合是其本质特征,目前离子流计算方法均未考虑离子流场与流场之间的双向耦合特征且难以应用于复杂风环境下的离子流计算。为此,该文考虑流场(流体方程)与离子流场(离子输运方程)之间的耦合关系,建立高压直流输电线路流场-离子流场双向耦合模型,采用有限元方法计算±800 kV高压直流输电线路地面合成电场和离子流密度的分布特性,计算结果与实验测量结果吻合较好,验证所建模型的有效性。基于此,重点研究不同风速和风向对±800 kV高压直流输电线路地面合成电场与离子流密度的影响规律。同时,考虑导线风偏和混合风对离子流场的影响,获得±800 kV高压直流输电线路在风偏和混合风影响下地面合成电场和离子流密度的分布规律。结果可为高压直流输电线路的设计及电磁环境评估等提供参考。Designing high-voltage direct current(HVDC)transmission lines require accurate calculation of ion flow and assessment of its electromagnetic impact.The interaction between corona discharge ion flow and fluid flow is critical in determining these characteristics.However,ion flow current calculation methods do not consider the two-way coupling between the ion flow field and flow field characteristics,making their application challenging in complex wind environments.In this paper,we explore the connection between fluid and ion transport equations within HVDC transmission lines'flow and ion flow fields.To accomplish this,we establish a two-way coupling model and utilize the finite element method to study the distribution of ground-level electric fields and ion flow density in±800 kV HVDC transmission lines.Our calculations align with experimental measurements,confirming the model's precision and potential for use when calculating ion flow density in windy conditions.Our results match the calculated values,confirming our model's effectiveness.Our main objective is to examine how different wind speeds and directions impact the electric field and ion current density of±800 kV HVDC transmission lines at the ground level.Wind swing and mixed wind can affect the ion current field of a conductor line.By studying the electric field distribution and ion current density at the ground level,we can gain insights into the electromagnetic conditions of±800 kV HVDC transmission lines,which can help design and evaluate their performance.

关 键 词：风环境 高压直流 电晕放电 离子流场 体积力 导线风偏 

分 类 号：TM15[电气工程—电工理论与新技术]