Power main circuit design of the flexible excitation systems for large hydropower units
In response to the system voltage stability and damping issues caused by insufficient dynamic reactive power support capability of renewable energy units， this paper proposes a novel power main circuit topology for flexible excitation systems suitable for large hydropower units. Based on the charact...
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| Format: | Article |
| Language: | zho |
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zhejiang electric power
2025-04-01
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| Series: | Zhejiang dianli |
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| Online Access: | https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=bb401fdb-e89a-4b6c-a21e-105a3601cc63 |
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| _version_ | 1850191956250984448 |
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| author | YAN Wenci JIA Sisi DU Bo WANG Dan LUO Jin ZHOU Kaimao TAO Zheng |
| author_facet | YAN Wenci JIA Sisi DU Bo WANG Dan LUO Jin ZHOU Kaimao TAO Zheng |
| author_sort | YAN Wenci |
| collection | DOAJ |
| description | In response to the system voltage stability and damping issues caused by insufficient dynamic reactive power support capability of renewable energy units， this paper proposes a novel power main circuit topology for flexible excitation systems suitable for large hydropower units. Based on the characteristics of large hydropower units， a main circuit consisting of a front-end active neutral-point clamped （ANPC） three-level converter and a novel rear-end three-level chopper is designed. Key parameters such as DC-side voltage， voltage and current withstand capability of power device， DC-side capacitance， and grid-side inductance are analyzed. Through the Simulink simulation platform， the performance of the flexible excitation system is compared with that of a conventional thyristor excitation system. The results demonstrate that the flexible excitation system exhibits significant advantages in terms of strong excitation performance and support capability under fault disturbances， effectively reducing oscillation time and enhancing power system stability. This research provides a theoretical basis for the optimal design of excitation systems for large hydropower units and lays the foundation for the engineering application of flexible excitation systems. |
| format | Article |
| id | doaj-art-642ee3c4d1a34756b9cb4d08f59db38b |
| institution | OA Journals |
| issn | 1007-1881 |
| language | zho |
| publishDate | 2025-04-01 |
| publisher | zhejiang electric power |
| record_format | Article |
| series | Zhejiang dianli |
| spelling | doaj-art-642ee3c4d1a34756b9cb4d08f59db38b2025-08-20T02:14:43Zzhozhejiang electric powerZhejiang dianli1007-18812025-04-01444111810.19585/j.zjdl.2025040021007-1881（2025）04-0011-08Power main circuit design of the flexible excitation systems for large hydropower unitsYAN Wenci0JIA Sisi1DU Bo2WANG Dan3LUO Jin4ZHOU Kaimao5TAO Zheng6Wudongde Hydropower Plant， Kunming 651512， ChinaNational Key Laboratory of Strong Electromagnetic Technology （Huazhong University of Science and Technology）， Wuhan 430074， ChinaWudongde Hydropower Plant， Kunming 651512， ChinaNational Key Laboratory of Strong Electromagnetic Technology （Huazhong University of Science and Technology）， Wuhan 430074， ChinaWudongde Hydropower Plant， Kunming 651512， ChinaNR Electric Co.， Ltd.， Nanjing 211102， ChinaNR Electric Co.， Ltd.， Nanjing 211102， ChinaIn response to the system voltage stability and damping issues caused by insufficient dynamic reactive power support capability of renewable energy units， this paper proposes a novel power main circuit topology for flexible excitation systems suitable for large hydropower units. Based on the characteristics of large hydropower units， a main circuit consisting of a front-end active neutral-point clamped （ANPC） three-level converter and a novel rear-end three-level chopper is designed. Key parameters such as DC-side voltage， voltage and current withstand capability of power device， DC-side capacitance， and grid-side inductance are analyzed. Through the Simulink simulation platform， the performance of the flexible excitation system is compared with that of a conventional thyristor excitation system. The results demonstrate that the flexible excitation system exhibits significant advantages in terms of strong excitation performance and support capability under fault disturbances， effectively reducing oscillation time and enhancing power system stability. This research provides a theoretical basis for the optimal design of excitation systems for large hydropower units and lays the foundation for the engineering application of flexible excitation systems.https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=bb401fdb-e89a-4b6c-a21e-105a3601cc63flexible excitationlarge hydropower unitsthree-level converter |
| spellingShingle | YAN Wenci JIA Sisi DU Bo WANG Dan LUO Jin ZHOU Kaimao TAO Zheng Power main circuit design of the flexible excitation systems for large hydropower units Zhejiang dianli flexible excitation large hydropower units three-level converter |
| title | Power main circuit design of the flexible excitation systems for large hydropower units |
| title_full | Power main circuit design of the flexible excitation systems for large hydropower units |
| title_fullStr | Power main circuit design of the flexible excitation systems for large hydropower units |
| title_full_unstemmed | Power main circuit design of the flexible excitation systems for large hydropower units |
| title_short | Power main circuit design of the flexible excitation systems for large hydropower units |
| title_sort | power main circuit design of the flexible excitation systems for large hydropower units |
| topic | flexible excitation large hydropower units three-level converter |
| url | https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=bb401fdb-e89a-4b6c-a21e-105a3601cc63 |
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