Design of Double-Loop Current Transformer Based on Magnetic Field Incomplete Cancellation
Electromagnetic current transformer is one of the important pieces of equipment used in AC power system measurement. Due to continuous improvement of current level to be measured in the power system, ordinary single-loop magnetic core structure cannot meet industrial needs of wide measuring range wi...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
China electric power research institute
2025-01-01
|
| Series: | CSEE Journal of Power and Energy Systems |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10246176/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849700000540393472 |
|---|---|
| author | Wenbo Li Xiaojun Tang Youshui Lu Ling Yan Yi Wu Mingzhe Rong |
| author_facet | Wenbo Li Xiaojun Tang Youshui Lu Ling Yan Yi Wu Mingzhe Rong |
| author_sort | Wenbo Li |
| collection | DOAJ |
| description | Electromagnetic current transformer is one of the important pieces of equipment used in AC power system measurement. Due to continuous improvement of current level to be measured in the power system, ordinary single-loop magnetic core structure cannot meet industrial needs of wide measuring range with high accuracy, while it even has a magnetic saturation problem when measured current is reaching the limit. Most existing methods expand measuring range and increase antisaturation ability of the magnetic core by either opening an air gap in the magnetic core or increasing number of turns of primary and secondary windings, but it will bring additional problems such as volume and heat dissipation of the transformer. To solve such issues, in this paper, we proposed a magnetic core structure of double-loop current transformer based on incomplete magnetic field cancellation principle. Calculation formula of air gap size and theoretical error are analyzed. We provide a theo-retical analysis of working characteristics, amplitude error and phase error throughout a three-dimensional simulation model of transformer. In addition, we evaluate performance through a series of comparison experiments. Results demonstrate our double-loop current transformer can maintain good linear relationship between primary and secondary current while ensuring measurement accuracy at 0.2 level. With the same volume, it has a wider range of rated current measurements and a certain anti-saturation ability. |
| format | Article |
| id | doaj-art-c17b7f4a2b8c4cff8d72548ff2341e02 |
| institution | DOAJ |
| issn | 2096-0042 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | China electric power research institute |
| record_format | Article |
| series | CSEE Journal of Power and Energy Systems |
| spelling | doaj-art-c17b7f4a2b8c4cff8d72548ff2341e022025-08-20T03:18:24ZengChina electric power research instituteCSEE Journal of Power and Energy Systems2096-00422025-01-0111277278210.17775/CSEEJPES.2022.0840010246176Design of Double-Loop Current Transformer Based on Magnetic Field Incomplete CancellationWenbo Li0Xiaojun Tang1Youshui Lu2Ling Yan3Yi Wu4Mingzhe Rong5School of Electrical Engineering, Xi'an Jiaotong University,Department of Measurement and Control Technology & Instrumentation,Xi'an,China,710000School of Electrical Engineering, Xi'an Jiaotong University,Department of Measurement and Control Technology & Instrumentation,Xi'an,China,710000School of Electrical Engineering, Xi'an Jiaotong University,Department of Measurement and Control Technology & Instrumentation,Xi'an,China,710000School of Electrical Engineering, Xi'an Jiaotong University,Department of Measurement and Control Technology & Instrumentation,Xi'an,China,710000School of Electrical Engineering, Xi'an Jiaotong University,State Key Laboratory of Electrical Insulation & Power Equipment,Xi'an,China,710000School of Electrical Engineering, Xi'an Jiaotong University,State Key Laboratory of Electrical Insulation & Power Equipment,Xi'an,China,710000Electromagnetic current transformer is one of the important pieces of equipment used in AC power system measurement. Due to continuous improvement of current level to be measured in the power system, ordinary single-loop magnetic core structure cannot meet industrial needs of wide measuring range with high accuracy, while it even has a magnetic saturation problem when measured current is reaching the limit. Most existing methods expand measuring range and increase antisaturation ability of the magnetic core by either opening an air gap in the magnetic core or increasing number of turns of primary and secondary windings, but it will bring additional problems such as volume and heat dissipation of the transformer. To solve such issues, in this paper, we proposed a magnetic core structure of double-loop current transformer based on incomplete magnetic field cancellation principle. Calculation formula of air gap size and theoretical error are analyzed. We provide a theo-retical analysis of working characteristics, amplitude error and phase error throughout a three-dimensional simulation model of transformer. In addition, we evaluate performance through a series of comparison experiments. Results demonstrate our double-loop current transformer can maintain good linear relationship between primary and secondary current while ensuring measurement accuracy at 0.2 level. With the same volume, it has a wider range of rated current measurements and a certain anti-saturation ability.https://ieeexplore.ieee.org/document/10246176/Current difference coefficientdouble-loop coreincomplete magnetic field cancellation |
| spellingShingle | Wenbo Li Xiaojun Tang Youshui Lu Ling Yan Yi Wu Mingzhe Rong Design of Double-Loop Current Transformer Based on Magnetic Field Incomplete Cancellation CSEE Journal of Power and Energy Systems Current difference coefficient double-loop core incomplete magnetic field cancellation |
| title | Design of Double-Loop Current Transformer Based on Magnetic Field Incomplete Cancellation |
| title_full | Design of Double-Loop Current Transformer Based on Magnetic Field Incomplete Cancellation |
| title_fullStr | Design of Double-Loop Current Transformer Based on Magnetic Field Incomplete Cancellation |
| title_full_unstemmed | Design of Double-Loop Current Transformer Based on Magnetic Field Incomplete Cancellation |
| title_short | Design of Double-Loop Current Transformer Based on Magnetic Field Incomplete Cancellation |
| title_sort | design of double loop current transformer based on magnetic field incomplete cancellation |
| topic | Current difference coefficient double-loop core incomplete magnetic field cancellation |
| url | https://ieeexplore.ieee.org/document/10246176/ |
| work_keys_str_mv | AT wenboli designofdoubleloopcurrenttransformerbasedonmagneticfieldincompletecancellation AT xiaojuntang designofdoubleloopcurrenttransformerbasedonmagneticfieldincompletecancellation AT youshuilu designofdoubleloopcurrenttransformerbasedonmagneticfieldincompletecancellation AT lingyan designofdoubleloopcurrenttransformerbasedonmagneticfieldincompletecancellation AT yiwu designofdoubleloopcurrenttransformerbasedonmagneticfieldincompletecancellation AT mingzherong designofdoubleloopcurrenttransformerbasedonmagneticfieldincompletecancellation |