Influence of the VSC-HVDC System Structure on the Overvoltage of Single-Pole Grounding Fault
Flexible operation mode is one of the VSC-HVDC system’s advantages, and the power system may continue to operate in the future with different grid structures under maintenance and other working conditions. However, for the VSC-HVDC system with overhead transmission lines, the DC lines are prone to s...
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State Grid Energy Research Institute
2021-10-01
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| Series: | Zhongguo dianli |
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| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202009036 |
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| author | Jialing WU Tiebing LU |
| author_facet | Jialing WU Tiebing LU |
| author_sort | Jialing WU |
| collection | DOAJ |
| description | Flexible operation mode is one of the VSC-HVDC system’s advantages, and the power system may continue to operate in the future with different grid structures under maintenance and other working conditions. However, for the VSC-HVDC system with overhead transmission lines, the DC lines are prone to single-pole grounding fault. Therefore, it is necessary to study the overvoltage of the DC lines with single-pole grounding fault for different grid structures. In this paper, a VSC-HVDC overvoltage model is built based on the ring-type four-terminal DC grid project, and the transient overvoltage characteristics of the VSC-HVDC system with the DC-side grounding fault are studied. The overvoltage levels of key nodes and equipment inside and outside the converter station are analyzed for four different VSC-HVDC grid structures with single-pole grounding fault occurring in the DC line. The results show that the system has a relatively low overvoltage level for the pseudo-U shaped structure, but has a relatively high overvoltage level for the broken-line shaped and real-U shaped structures. The system structures have the similar impact tendencies on the voltage to ground at the valve-side of converter transformer and on the overvoltage of the converter station bus. |
| format | Article |
| id | doaj-art-b7d4ff91aecf4ba688e4cce9a5ca3eb6 |
| institution | DOAJ |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2021-10-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-b7d4ff91aecf4ba688e4cce9a5ca3eb62025-08-20T02:59:18ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492021-10-015410202710.11930/j.issn.1004-9649.202009036zgdl54-06-wujialingInfluence of the VSC-HVDC System Structure on the Overvoltage of Single-Pole Grounding FaultJialing WU0Tiebing LU1State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Beijing 102206, ChinaState Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Beijing 102206, ChinaFlexible operation mode is one of the VSC-HVDC system’s advantages, and the power system may continue to operate in the future with different grid structures under maintenance and other working conditions. However, for the VSC-HVDC system with overhead transmission lines, the DC lines are prone to single-pole grounding fault. Therefore, it is necessary to study the overvoltage of the DC lines with single-pole grounding fault for different grid structures. In this paper, a VSC-HVDC overvoltage model is built based on the ring-type four-terminal DC grid project, and the transient overvoltage characteristics of the VSC-HVDC system with the DC-side grounding fault are studied. The overvoltage levels of key nodes and equipment inside and outside the converter station are analyzed for four different VSC-HVDC grid structures with single-pole grounding fault occurring in the DC line. The results show that the system has a relatively low overvoltage level for the pseudo-U shaped structure, but has a relatively high overvoltage level for the broken-line shaped and real-U shaped structures. The system structures have the similar impact tendencies on the voltage to ground at the valve-side of converter transformer and on the overvoltage of the converter station bus.https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202009036vsc-hvdcstructure of dc gridsingle-pole grounding faultovervoltageoverhead transmission lines |
| spellingShingle | Jialing WU Tiebing LU Influence of the VSC-HVDC System Structure on the Overvoltage of Single-Pole Grounding Fault Zhongguo dianli vsc-hvdc structure of dc grid single-pole grounding fault overvoltage overhead transmission lines |
| title | Influence of the VSC-HVDC System Structure on the Overvoltage of Single-Pole Grounding Fault |
| title_full | Influence of the VSC-HVDC System Structure on the Overvoltage of Single-Pole Grounding Fault |
| title_fullStr | Influence of the VSC-HVDC System Structure on the Overvoltage of Single-Pole Grounding Fault |
| title_full_unstemmed | Influence of the VSC-HVDC System Structure on the Overvoltage of Single-Pole Grounding Fault |
| title_short | Influence of the VSC-HVDC System Structure on the Overvoltage of Single-Pole Grounding Fault |
| title_sort | influence of the vsc hvdc system structure on the overvoltage of single pole grounding fault |
| topic | vsc-hvdc structure of dc grid single-pole grounding fault overvoltage overhead transmission lines |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202009036 |
| work_keys_str_mv | AT jialingwu influenceofthevschvdcsystemstructureontheovervoltageofsinglepolegroundingfault AT tiebinglu influenceofthevschvdcsystemstructureontheovervoltageofsinglepolegroundingfault |