摘要
高压交、直流输电线路同走廊架设作为一种提高走廊输电能力和节约土地资源的方法得到大力发展。两种线路相互接近时,其电磁环境与交直流线路单独运行时是不同的,因此需要对混合场进行分析从而指导混合线路的设计。在分析混合线路离子流场中,第一次将时域混合有限元法应用于混合离子流场的数值模拟。此外,在数值模拟中高压直流和交流输电线路之间的相互作用被考虑。通过与实测结果以及现有方法相比,证明了所提方法更加适合交、直流线路混合离子流场问题的分析,并且在提高计算效率和精确度的同时获得了无震荡数值解。对不同混合线路配置模型的地面电场和离子流密度进行了数值模拟,通过分析计算结果,总结了混合输电线路电场分布的一般规律。最后,利用所提数值模拟方法对两种典型的全尺寸同走廊输电线路模型进行了分析,进而为工程设计提供参考。
Erecting high-voltage direct current (HVDC) and HV alternating current (HVAC) transmission lines in the same corridor, as a promising way of substantially increasing transmission capacities in the corridor and saving the land resources, is being developed in a more cost-effective manner. When the two transmission lines are close to each other, the electromagnetic environment is different from what will be if the AC and DC lines are operated independently, so it is necessary to analyze the hybrid field. In the analysis of the hybrid transmission lines ion-flow field, the time-domain mixed-hybrid finite element method was applied to the numerical analysis of the hybrid ion-flow field. Additionally, the interactions between the HVDC and HVAC lines in the corona electric field were considered. Compared with measured results and previous methods, the presented method is more suitable for the simulation of the hybrid ion-flow field problem from the HVAC and HVDC transmission lines. The results show that wiggle-free numerical solution significantly reduced the computational burden and the calculation precision is increased greatly. The ground-level electric field and ion current density of the hybrid lines for the different configurations were calculated and the general rules of the electric field distribution of the hybrid transmission lines were summarized by comparing these calculated results. Finally, the ground-level electric field and ion current density of two typical hybrid transmission lines in the same corridor were analyzed, providing reference for the engineering design.
作者
田毅
黄新波
田文超
曹雯
朱永灿
赵隆
张烨
TIAN Yi;HUANG Xin-bo;TIAN Wen-chao;CAO Wen;ZHU Yong-can;ZHAO Long;ZHANG Ye(Department of Electronics and Information,Xi′an Polytechnic University,Xi′an 710048,China;Department of Electrical and Mechanical Engineering,Xidian University,Xi′an 710071,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2019年第10期85-94,共10页
Electric Machines and Control
基金
国家自然科学基金(51177115)
陕西省自然科学基础研究计划(2018JM5137)
陕西省教育厅专项科研计划项目(18JK0345)
关键词
混合线路
离子流场
电晕
时域混合有限元法
电场分布
hybrid transmission line
ion-flow field
corona
time-domain mixed-hybrid finite element method
electric field distribution
