scholarly journals Transforming characteristics of the Rogowski coil current transformer with a digital integrator for high-frequency signals

2019 ◽  
Vol 2019 (16) ◽  
pp. 3337-3340 ◽  
Author(s):  
Fubin Pang ◽  
Yu Liu ◽  
Jianfei Ji ◽  
Chi Zhang
Keyword(s):  
High Frequency ◽  
Current Transformer ◽  
Rogowski Coil ◽  
Coil Current ◽  
Digital Integrator

Design and Analysis of PCB Rogowski Coil Current Transformer

2014 ◽  
Vol 672-674 ◽  
pp. 984-988
Author(s):  
Biao Su ◽  
Li Xue Li ◽  
Yi Hui Zheng ◽  
Xin Wang ◽  
Yan Liu ◽  
...  
Keyword(s):  
Power System ◽  
High Sensitivity ◽  
Current Transformer ◽  
Rogowski Coil ◽  
Electromagnetic Current ◽  
Current Transformers ◽  
Coil Current ◽  
Electronic Current ◽  
Rogowski Coils ◽  
Electronic Current Transformers

Electronic current transformers are more suitable for the development of power system compared with traditional electromagnetic current transformers. Rogowski coil current transformer is one of three electric current transformers. According to the measurement principle of Rogowski coils, the equivalent circuit of PCB Rogowski coils is analyzed. By using four PCB Rogowski coils combined, a PCB Rogowski coil current transformer is designed and tested. The results show that the designed PCB Rogowski coil transformer has good linearity and high sensitivity and measurement accuracy and it can meet the requirement of power system.

scholarly journals PCB-Embedded Spiral Pattern Pick-Up Coil Current Sensor for WBG Devices

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5747
Author(s):  
Hwa-Rang Cha ◽  
Kyeong-Mo Kim ◽  
Min-Soo Song ◽  
Rae-Young Kim
Keyword(s):  
Semiconductor Device ◽  
Current Transformer ◽  
Rogowski Coil ◽  
Current Measurement ◽  
Circuit Board ◽  
Current Sensor ◽  
Spiral Pattern ◽  
Measurement Sensitivity ◽  
Coil Current ◽  
Parasitic Inductance

This paper proposes a current sensor for wide bandgap (WBG) devices. The current of a power semiconductor device is mainly measured using a Rogowski coil, an active current transformer, and a coaxial shunt resistor. The Rogowski coil and active current transformer are not suitable for the current measurement of surface mount WBG devices due to their operating principle. The coaxial shunt resistor causes parasitic inductance. Since WBG devices are more sensitive to parasitic inductance than silicon devices, parasitic inductance may affect circuit operation. To overcome these problems, this paper proposes a printed circuit board (PCB)-embedded spiral pattern pick-up coil current measurement for WBG devices. The proposed pick-up coil has high mutual inductance compared to the conventional pick-up coil, so the measurement sensitivity is high. In addition, there is no need for additional processing outside the PCB. Experimental results using a double pulse tester circuit are provided to verify the performance of the proposed current sensor.

The Application of Rogowski Coil in Power System

2014 ◽  
Vol 986-987 ◽  
pp. 1666-1668 ◽  
Author(s):  
Qing Hao Wang ◽  
Yun Shan Zhang ◽  
Wen Guang Zhang ◽  
Zhi Li ◽  
Ning Zhang ◽  
...  
Keyword(s):  
Power System ◽  
Electric Power ◽  
Rapid Development ◽  
Current Transformer ◽  
Rogowski Coil ◽  
Electric Power System ◽  
Important Research ◽  
Coil Current ◽  
Measurement Device ◽  
Research Directions

The traditional current transformer measurement device cannot meet the requirements of the rapid development in the current power system because of the outdated structure while the Rogowski coil has significant advantages. This article introduces some applications of Rogowski coil in power system. Now the research and application of Rogowski coil current transformer has become one of the most important research directions. Rogowski coil today has been widely used in electric power system.

scholarly journals Design and research of fiber optically powered Rogowski coil current transformer

2011 ◽  
Vol 15 ◽  
pp. 886-890 ◽  
Author(s):  
Wang Yutian ◽  
Yuan Jing ◽  
Wang Huixin ◽  
Liu Jie
Keyword(s):  
Current Transformer ◽  
Rogowski Coil ◽  
Coil Current

Research on PCB Rogowski Current Transformer Based on AD7742

2014 ◽  
Vol 981 ◽  
pp. 589-593
Author(s):  
Xin Lao Wei ◽  
Bo Zhu ◽  
Bing Pang ◽  
Tong Liu ◽  
Song Wang ◽  
...  
Keyword(s):  
Current Transformer ◽  
High Accuracy ◽  
Rogowski Coil ◽  
Magnetic Saturation ◽  
Iron Core ◽  
Measuring Range ◽  
Digital Integrator ◽  
Saturation Phenomenon ◽  
Good Linearity ◽  
Rogowski Coils

Rogowski coils is a kind of special structure hollow coils, it has good linearity, no iron core, no magnetic saturation phenomenon and wide measuring range, which has been used to measure all kinds of various changes current. The current transformer consist of PCB Rogowski coil and digital integrator has been designed, includes the structure of PCB Rogowski coils and the principle digital integrator based on AD7742. The test of PCB current transformer show that it has high accuracy and PCB coils has good linearity. It can meet the requirement of current measurement.

scholarly journals Hybrid Sensing of Internal and Surface Partial Discharges in Air-Insulated Medium Voltage Switchgear

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1738 ◽  
Author(s):  
Ghulam Amjad Hussain ◽  
Ashraf A. Zaher ◽  
Detlef Hummes ◽  
Madia Safdar ◽  
Matti Lehtonen
Keyword(s):  
Condition Monitoring ◽  
High Frequency ◽  
Signal To Noise Ratio ◽  
Cost Effective ◽  
Current Transformer ◽  
Rogowski Coil ◽  
High Signal ◽  
Synchronous Generators ◽  
Medium Voltage ◽  
Testing And Measurement

Partial discharge (PD) measurements have proved their reliability for health monitoring of insulation systems in power system components including synchronous generators, power transformers, switchgear and cables etc. Online condition monitoring and pro-active detection of PD faults have been highly demanded over the last two decades. This paper provides results from a research project to develop advanced non-intrusive sensing technologies that are cost effective, reliable and efficient for early detection of PD faults in medium voltage (MV) and high voltage (HV) air-insulated switchgear. Three sensors (high frequency E-field (D-dot) sensor, Rogowski coil and loop antenna) have been developed and tested under various PD faults and their performance were evaluated in comparison with high frequency current transformer (HFCT) which is being used commercially for PD testing and measurement. Among these three sensors, it is shown that D-dot sensor and Rogowski coil are more dependable when it comes to the PD measurements due to their high signal to noise ratio and hence high accuracy. These sensors can be customized according to a specific application and can be connected together with one data acquisition device while developing an online condition monitoring system.

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