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Full-Range Calibration Device for Low-Voltage Current Transformers Based on Power-Frequency Adaptive Noise Reduction
ID：4 View Protection：ATTENDEE Updated Time：2025-07-31 15:32:19 Hits：315 Poster Presentation

Start Time：2025-11-09 09:00（Asia/Shanghai）

Duration：1min

Session：P Poster presentation » P44.High voltage and insulation technology

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Abstract
With the rapid advancement of China's power system toward intelligence and digitalization, there is an increasing demand for online calibration technologies for low-voltage current transformers (CT) under operating conditions. Traditional laboratory-based calibration methods face significant challenges in large-scale distributed applications, complex on-site interference environments, and periodic verification tasks, such as low efficiency, high cost, and limited access to power outage windows. To address these issues, this paper presents a full-range calibration device for low-voltage CTs based on power-frequency adaptive noise reduction technology. The device integrates high signal-to-noise ratio acquisition, adaptive frequency tracking, and background current suppression, enabling uninterrupted, full-range, and automated online calibration of CTs in diverse field conditions. To evaluate the device’s performance in terms of stability, accuracy, and adaptability under various operating conditions, a comprehensive validation plan was designed in accordance with national metrological technical specifications. The results provide a solid foundation for the engineering application and large-scale deployment of the device in the field of power metering.
 
Keywords
Low-voltage current transformer; online calibration; full-range calibration; power-frequency adaptive noise reduction
Speaker
Zhao Qiancheng
Engineer China electric power research institute

Submission Author
Zhao Qiancheng China electric power research institute
Liu Jing China Electric Power Research Institute
Fang Tian China Electric Power Research Institute
Liu Houxuan China Electric Power Research Institute
Qi Xin China Electric Power Research Institute
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Important Date

  • Conference Date

    Nov 07

    2025

    to

    Nov 09

    2025

  • Oct 30 2025

    Draft paper submission deadline

  • Nov 10 2025

    Registration deadline

Sponsored By
IEEE西南交通大学IAS学生分会
Organized By
西南交通大学电气工程学院
SPACI车网关系研究室
四川大学电力系统稳定与高压直流输电研究团队
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