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Volume 22
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10.3390/s22207979
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Article

Contactless AC/DC Wide-Bandwidth Current Sensor Based on Composite Measurement Principle

by
Xiangyu Tan
1,
Wenyun Li
2,
Xiaowei Xu
1,
Gang Ao
3,
Fangrong Zhou
1,
Jingjing Zhao
4,
Qinghua Tan
5 and
Wenbin Zhang
5,*
1
Electric Power Research Institute, Yunnan Power Grid Co., Ltd., Kunming 650217, China
2
China Southern Power Grid, Yunnan Power Grid Co., Ltd., Kunming 650217, China
3
Yunnan Power Grid Co., Ltd., Kunming Power Supply Bureau, Kunming 650001, China
4
College of Science, Kunming University of Science and Technology, Kunming 650504, China
5
College of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650504, China
*
Author to whom correspondence should be addressed.
Sensors 2022, 22(20), 7979; https://doi.org/10.3390/s22207979
Submission received: 9 August 2022 / Revised: 14 September 2022 / Accepted: 19 September 2022 / Published: 19 October 2022
(This article belongs to the Special Issue Magnetic Sensor and Its Applications)
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Abstract

With the accelerated construction of the smart grid, new energy sources such as photovoltaic and wind power are connected to the grid. In addition to power frequency, the current signal of power grid also includes several DC signals, as well as medium-high and high-frequency transient signals. Traditional current sensors for power grids are bulky, have a narrow measurement range, and cannot measure both AC and DC at the same time. Therefore, this paper designs a non-intrusive, AC-DC wide-bandwidth current sensor based on the composite measurement principle. The proposed composite current detection scheme combines two different isolation detection technologies, namely tunneling reluctance and the Rogowski coil. These two current sensing techniques are complementary (tunneling magnetoresistive sensors have good low-frequency characteristics and Rogowski coils have good high-frequency characteristics, allowing for a wide detection bandwidth). Through theoretical and simulation analysis, the feasibility of the composite measurement scheme was verified. The prototype of composite current sensor was developed. The DC and AC transmission characteristics of the sensor prototype were measured, and the sensitivity and linearity were 11.96 mV/A, 1.14%, respectively. Finally, the sweep current method and pulse current method experiments prove that the designed composite current sensor can realize the current measurement from DC to 17 MHz.
Keywords: contactless; current sensor; composite sensor; Rogowski coil; tunneling reluctance contactless; current sensor; composite sensor; Rogowski coil; tunneling reluctance

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MDPI and ACS Style

Tan, X.; Li, W.; Xu, X.; Ao, G.; Zhou, F.; Zhao, J.; Tan, Q.; Zhang, W. Contactless AC/DC Wide-Bandwidth Current Sensor Based on Composite Measurement Principle. Sensors 2022, 22, 7979. https://doi.org/10.3390/s22207979

AMA Style

Tan X, Li W, Xu X, Ao G, Zhou F, Zhao J, Tan Q, Zhang W. Contactless AC/DC Wide-Bandwidth Current Sensor Based on Composite Measurement Principle. Sensors. 2022; 22(20):7979. https://doi.org/10.3390/s22207979

Chicago/Turabian Style

Tan, Xiangyu, Wenyun Li, Xiaowei Xu, Gang Ao, Fangrong Zhou, Jingjing Zhao, Qinghua Tan, and Wenbin Zhang. 2022. "Contactless AC/DC Wide-Bandwidth Current Sensor Based on Composite Measurement Principle" Sensors 22, no. 20: 7979. https://doi.org/10.3390/s22207979

APA Style

Tan, X., Li, W., Xu, X., Ao, G., Zhou, F., Zhao, J., Tan, Q., & Zhang, W. (2022). Contactless AC/DC Wide-Bandwidth Current Sensor Based on Composite Measurement Principle. Sensors, 22(20), 7979. https://doi.org/10.3390/s22207979

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