Calculation method of nonmetallic short circuit fault current in DC side of MMC-HVDC system

被引：0
|
作者：
Wang Z. [1 ]
Hao L. [1 ]
Wang L. [1 ]
He J. [1 ]
Chen Z. [2 ]
机构：
[1] College of Electrical Engineering, Beijing Jiaotong University, Beijing
[2] State Grid Corporation of China, Beijing
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2024年 / 44卷 / 03期
关键词：
coupling mechanism; fault characteristics; fault current calculation; MMC-HVDC; modular multilevel converter; nonmetallic fault;
D O I：
10.16081/j.epae.202306016
中图分类号：
学科分类号：
摘要：
To explore the practical engineering calculation method of DC side short circuit current of modular multilevel converter based high voltage direct current(MMC-HVDC) system,the mutual suppression of discharge current and coupling mechanism of discharge circuit under the condition of nonmetallic short circuit fault are analyzed based on the general analytical formula of metallic short circuit fault current. And the decoupling calculation method of short circuit current is proposed based on the deduced analytical formula. The nonmetallic short circuit fault condition of MMC-HVDC system is simulated based on PSCAD/EMTDC, and the simulative results are compared with the analytical calculation values. Meanwhile,a digital-physical hybrid simulation experiment model is established,and the short circuit faults are set at the digital and the physical terminals respectively to compare the experimental values with the analytical values. The verification results indicate that the proposed short circuit current calculation method can accurately characterize the current evolution trend of nonmetallic short circuit fault current in DC side of MMC-HVDC system. © 2024 Electric Power Automation Equipment Press. All rights reserved.
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页码：187 / 194
页数：7
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