Research on boundary frequency characteristics of Kunliulong hybrid three-terminal UHVDC transmission line

被引：0
|
作者：
Xing C. [1 ]
Cai W. [1 ,2 ,3 ]
Bi G. [2 ]
Chen S. [2 ]
Gao J. [2 ]
Wang L. [2 ]
机构：
[1] Electric Power Research Institute of Yunnan Power Grid Co.，Ltd., Kunming
[2] School of Electrical Engineering, Kunming University of Science and Technology, Kunming
[3] Kunming Power Supply Bureau of Yunnan Power Grid Co.，Ltd., Kunming
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2023年 / 43卷 / 02期
基金：
中国国家自然科学基金;
关键词：
attenuation characteristic; frequency characteristic; high frequency transient signal; hybrid three-terminal UHVDC power transmission; line boundary;
D O I：
10.16081/j.epae.202208048
中图分类号：
学科分类号：
摘要：
In order to study the traveling wave boundary protection of the line commutated converter-modular multilevel converter（LCC-MMC） parallel hybrid three-terminal UHVDC line，it is necessary to study the boundary frequency characteristics of the LCC-MMC parallel hybrid three-terminal UHVDC transmission line. The boundary of hybrid three-terminal UHVDC transmission line is asymmetric. The topological structures of Kunbei-side boundary，Liubei-side boundary，the boundary of Kunliu-section line last end，the boundary of Liulong-section line first end，and the Longmen-side boundary are studied. The boundary frequency domain model of hybrid multi-terminal UHVDC transmission line is established，by which，the boundary frequency characteristics of line and the attenuation characteristics of high-frequency transient signals under the boundary of transmission line are studied. The study results show that for high-frequency transient signals，Kunbei，Liubei and Longmen-side boundaries exhibit high resistance characteristics and have a strong attenuation on high-frequency transient signals，the boundary of Kunliu-section line last end and the boundary of Liulong-section line first end have attenuation effect on the mid-low frequency transient signals，and the attenuation of the high frequency transient signals is weak. © 2023 Electric Power Automation Equipment Press. All rights reserved.
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页码：135 / 141
页数：6
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