Study on Burnout Mechanism of TE Board for HVDC Transmission Project Electric Triggered Converter Valve
Thyristor electronic board (TE board) of HVDC converter valve is an important equipment of HVDC converter valve. In the process of operation and maintenance, TE board burned out many times, resulting in the shutdown of the converter valve pole, which affects the safe operation of HVDC project seriou...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
State Grid Energy Research Institute
2020-05-01
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| Series: | Zhongguo dianli |
| Subjects: | |
| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201810028 |
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| Summary: | Thyristor electronic board (TE board) of HVDC converter valve is an important equipment of HVDC converter valve. In the process of operation and maintenance, TE board burned out many times, resulting in the shutdown of the converter valve pole, which affects the safe operation of HVDC project seriously. This paper studies the TE board resistor burnout event in Tian-Guang HVDC project. Firstly, the appearance and electrical performance of TE plate are inspected. The damaged area of internal circuit of components is confirmed by X-ray detection and scanning acoustic microscopy, and the function modules of TE board which belong to each damaged component are also confirmed. Then, the burning reason of TE board faulty components is analyzed by circuit principle method, and the burning mechanism of TE board is speculated. The process of TE board burning failure is reproduced through experiments to verify the assumed mechanism for TE board burnout. Finally, the cause of TE board burning is obtained. The analysis method has reference significance for the analysis of similar board failure in HVDC project. |
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| ISSN: | 1004-9649 |