Valve-Side Single-Phase-to-Ground Fault Analysis in Bipolar MMC-HVDC Systems With Hybrid SMs

被引：2
|
作者：
Sun, Pingyang [1 ]
Li, Gen [2 ]
Wang, Hongyi [3 ]
Liang, Jun [4 ]
Konstantinou, Georgios [1 ]
机构：
[1] UNSW, Sch Elect Engn & Telecommun, Sydney, NSW 2052, Australia
[2] Tech Univ Denmark DTU, Dept Engn Technol, Energy Technol & Comp Sci Sect, DK-2750 Ballerup, Denmark
[3] Aalborg Univ, Dept AAU Energy, DK-9220 Aalborg, Denmark
[4] Cardiff Univ, Sch Engn, Cardiff CF24 3AA, Wales
来源：
IEEE TRANSACTIONS ON POWER DELIVERY | 2024年 / 39卷 / 05期
关键词：
Voltage control; Circuit faults; Voltage; Capacitors; Fault currents; Protection; Grounding; Valve-side ac fault; single-phase fault; hybrid SMs; HVDC; MMC;
D O I：
10.1109/TPWRD.2024.3429783
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This letter presents a comprehensive fault analysis for a modular multilevel converter high-voltage direct current (MMC-HVDC) system with hybrid half-bridge submodules (HBSMs) and full-bridge SMs (FBSMs) under valve-side single-phase-to-ground (SPG) faults. The analysis shows protection for upper arms is necessary due to the inevitable upper arm overvoltage. It further specifies that the proportion of FBSMs utilized in each arm should be at least 86.6% of the available voltage to safely clear valve-side SPG faults without overvoltage in the lower arms. The accuracy of the theoretical analysis is validated in the positive pole of a bipolar MMC-HVDC system with different ratios of FBSMs modelled in PSCAD/EMTDC.
引用
收藏
页码：3001 / 3004
页数：4
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