Research on the impact of transformer switching-off on core residual magnetism
Magnetizing inrush current caused by transformer no-load switching can lead to various issues in power grid operations. Techniques such as phase-controlled switching are effective in mitigating these effects， with the key factor being the measurement of the transformer core’s residual magnetism. Thi...
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| Format: | Article |
| Language: | zho |
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zhejiang electric power
2025-02-01
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| Series: | Zhejiang dianli |
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| Online Access: | https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=564acdbe-b1d0-4fdb-87b3-f9b4dd9580db |
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| _version_ | 1850025459378552832 |
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| author | HAN Xiao CHEN Haotian ZHOU Jia CHEN Wei CHEN Deshu |
| author_facet | HAN Xiao CHEN Haotian ZHOU Jia CHEN Wei CHEN Deshu |
| author_sort | HAN Xiao |
| collection | DOAJ |
| description | Magnetizing inrush current caused by transformer no-load switching can lead to various issues in power grid operations. Techniques such as phase-controlled switching are effective in mitigating these effects， with the key factor being the measurement of the transformer core’s residual magnetism. This paper investigates the impact of transformer switching-off on core residual magnetism. First， based on the transformer switching-off circuit， the switching-off interruption overvoltage is estimated， and its qualitative impact on core residual magnetism is analyzed. Next， using J-A hysteresis simulation， the relationship between transformer core residual magnetism and switching-off angle， as well as the magnetic flux trajectory after switching-off， is explored. Finally， quantitative measurement of the transformer’s residual magnetism is conducted， revealing the evolution patterns of actual residual magnetism. The theoretical analysis and simulation-based findings are validated. |
| format | Article |
| id | doaj-art-b78dbdf07ff244979216caffc747ee89 |
| institution | DOAJ |
| issn | 1007-1881 |
| language | zho |
| publishDate | 2025-02-01 |
| publisher | zhejiang electric power |
| record_format | Article |
| series | Zhejiang dianli |
| spelling | doaj-art-b78dbdf07ff244979216caffc747ee892025-08-20T03:00:50Zzhozhejiang electric powerZhejiang dianli1007-18812025-02-0144210310910.19585/j.zjdl.2025020101007-1881（2025）02-0103-07Research on the impact of transformer switching-off on core residual magnetismHAN Xiao0CHEN Haotian1ZHOU Jia2CHEN Wei3CHEN Deshu4School of Electrical and Electronic Engineering， Huazhong University of Science and Technology， Wuhan 430074， ChinaSchool of Electrical and Electronic Engineering， Huazhong University of Science and Technology， Wuhan 430074， ChinaDongguan Power Supply Bureau of Guangdong Power Grid Co.， Ltd.， Dongguan 523009， ChinaSchool of Electrical and Electronic Engineering， Huazhong University of Science and Technology， Wuhan 430074， ChinaSchool of Electrical and Electronic Engineering， Huazhong University of Science and Technology， Wuhan 430074， ChinaMagnetizing inrush current caused by transformer no-load switching can lead to various issues in power grid operations. Techniques such as phase-controlled switching are effective in mitigating these effects， with the key factor being the measurement of the transformer core’s residual magnetism. This paper investigates the impact of transformer switching-off on core residual magnetism. First， based on the transformer switching-off circuit， the switching-off interruption overvoltage is estimated， and its qualitative impact on core residual magnetism is analyzed. Next， using J-A hysteresis simulation， the relationship between transformer core residual magnetism and switching-off angle， as well as the magnetic flux trajectory after switching-off， is explored. Finally， quantitative measurement of the transformer’s residual magnetism is conducted， revealing the evolution patterns of actual residual magnetism. The theoretical analysis and simulation-based findings are validated.https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=564acdbe-b1d0-4fdb-87b3-f9b4dd9580dbtransformer magnetizing inrush currentresidual magnetismchopping overvoltagemagnetizing inrush current suppressionno-load closing |
| spellingShingle | HAN Xiao CHEN Haotian ZHOU Jia CHEN Wei CHEN Deshu Research on the impact of transformer switching-off on core residual magnetism Zhejiang dianli transformer magnetizing inrush current residual magnetism chopping overvoltage magnetizing inrush current suppression no-load closing |
| title | Research on the impact of transformer switching-off on core residual magnetism |
| title_full | Research on the impact of transformer switching-off on core residual magnetism |
| title_fullStr | Research on the impact of transformer switching-off on core residual magnetism |
| title_full_unstemmed | Research on the impact of transformer switching-off on core residual magnetism |
| title_short | Research on the impact of transformer switching-off on core residual magnetism |
| title_sort | research on the impact of transformer switching off on core residual magnetism |
| topic | transformer magnetizing inrush current residual magnetism chopping overvoltage magnetizing inrush current suppression no-load closing |
| url | https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=564acdbe-b1d0-4fdb-87b3-f9b4dd9580db |
| work_keys_str_mv | AT hanxiao researchontheimpactoftransformerswitchingoffoncoreresidualmagnetism AT chenhaotian researchontheimpactoftransformerswitchingoffoncoreresidualmagnetism AT zhoujia researchontheimpactoftransformerswitchingoffoncoreresidualmagnetism AT chenwei researchontheimpactoftransformerswitchingoffoncoreresidualmagnetism AT chendeshu researchontheimpactoftransformerswitchingoffoncoreresidualmagnetism |