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.

DESIGN AND TEST OF A NEW HIGH-CURRENT ELECTRONIC CURRENT TRANSFORMER WITH A ROGOWSKI COIL

2014 ◽  
Vol 21 (1) ◽  
pp. 121-132 ◽  
Author(s):  
Ming Zhang ◽  
Kaicheng Li ◽  
Shunfan He ◽  
Jun Wang
Keyword(s):  
Dynamic Range ◽  
Partial Evaluation ◽  
Current Transformer ◽  
Rogowski Coil ◽  
High Current ◽  
Current Transformers ◽  
Electronic Current Transformer ◽  
Electronic Current ◽  
Electro Magnetic ◽  
Electronic Current Transformers

Abstract This paper describes the design and test of a new high-current electronic current transformer based on a Rogowski coil. For better performances, electronic current transformers are used to replace conventional electro-magnetic inductive current transformers based on ferromagnetic cores and windings to measure high-current on the high voltage distribution grids. The design of a new high-current electronic current transformer is described in this paper. The principal schemes of the prototype and partial evaluation results are presented. Through relative tests it is known that the prototype has a wide dynamic range and frequency band, and it can allow high accuracy measurements.

A Nonlinear Compensation Approach for the Iron-Core Coils Based Electronic Current Transformers

2011 ◽  
Vol 383-390 ◽  
pp. 4371-4376
Author(s):  
Yue Xie ◽  
Li Qing Shen ◽  
Jing Chen
Keyword(s):  
Electrical Measuring ◽  
Nonlinear Behavior ◽  
Current Transformer ◽  
Iron Core ◽  
Current Transformers ◽  
Electronic Current ◽  
Nonlinear Compensation ◽  
Compensation Approach ◽  
Electronic Current Transformers ◽  
Hardware Circuit

Iron-Core coils based electronic current transformer is often used with electrical measuring instrumnts and meters. However, the iron-core coils used as the primary current sensor have nonlinear behavior, and its magnetizing current can be considered as the main error source. Therefore, a nonlinear compensation approach for the iron-core coils based electronic current transformers is proposed in this paper. The approach depends on a linear hardware circuit and a nonlinear numeric control law. Theoretical analysis and experimental results have verified the correctness of the proposed method.

An Innovative Electronic Current Transformer Applied in High Voltage Systems

2011 ◽  
Vol 301-303 ◽  
pp. 1471-1476 ◽  
Author(s):  
Zheng Qi Tian ◽  
Zhen Hua Li ◽  
Yue Tong
Keyword(s):  
Current Transformer ◽  
High Price ◽  
Test Results ◽  
Paper Test ◽  
Current Transformers ◽  
Integration Algorithm ◽  
Electronic Current Transformer ◽  
Electronic Current ◽  
Power Frequency ◽  
Electronic Current Transformers

With the development of power system, Conventional current transformers (CTs) show a growing number of shortcomings. For better performances, Electronic Current Transformers (ECTs) are researched to replace CT. But high price, unsatisfactory life and unpredictable reliability hold back their industrializations. Employing the insulation structure of traditional inverted SF6transformers and the new sensing principle at the same time, using high-precision digital integration algorithm which has higher precision to extracting the power frequency signal, an innovative electronic current transformer is introduced in this paper. Test results show that the transformer has high accuracy, low price, good stability, wide frequency response and long life.

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.

Analysis and Research of Rogowski Coil Current Sensing Technology

2014 ◽  
Vol 599-601 ◽  
pp. 819-822 ◽  
Author(s):  
Yong Zhen Gong ◽  
Hui Liao
Keyword(s):  
Power System ◽  
High Precision ◽  
Rogowski Coil ◽  
Measuring System ◽  
Coil Current ◽  
Current Sensing ◽  
Sensing Technology ◽  
Working Principle ◽  
Rogowski Coils ◽  
Higher Sensitivity

The paper introduces the working principle of Rogowski coil and characteristics of various Rogowski coils, Summing up the productionl principle of high precision coil. The measuring system which is composed of PCB Rogowski coils and integrator are designed by optimizing coil parameters,and the simulation of system is analyzed.The result shows that the system has higher sensitivity and good frequency characteristics, and can meet the requirement of measurement in power system.

Error Calculating and Compensating Method of All-Optical Fiber Current Transformer in ± 10 kV DC Distribution Network

2019 ◽  
Vol 14 (11) ◽  
pp. 1606-1615
Author(s):  
Jicheng Yu ◽  
Changxi Yue ◽  
Jun Li ◽  
Dengyun Li ◽  
He Li
Keyword(s):  
Optical Fiber ◽  
Distribution Network ◽  
Current Transformer ◽  
Electromagnetic Current ◽  
Current Transformers ◽  
Wave Plate ◽  
Remote Transmission ◽  
Dc Distribution ◽  
All Optical ◽  
Database Technology

Current transformer is one of the main equipment in ±10 kV DC distribution network. Traditional electromagnetic current transformer has poor anti-jamming capacity and poor insulation, so it cannot realize transient protection. The emergence of all-optical fiber current transformer brings solutions to these problems, which has attracted more and more attention. In this study, aiming at the problem of error and compensation of λ/4 waveform of all-fiber current transformer, the fabrication method of λ/4 waveform is studied, the mathematical model of the waveform is established, the influence of the waveform error on the scale factor is analyzed, and a calculating device of angle difference and ratio difference to compare the error is designed. The device adopts the principle of traceability of quantities to collect the state data of the wave plate. At the same time, in order to collect data for errors, database technology and network technology are used to realize remote transmission of monitoring data. The error of the λ/4 wave plate is compensated, the bidirectional principle generated by the birefringence in the fiber ring is analyzed, and the data logic description of the transformer sensitive ring is performed. The phase delay and the angle of the shaft are selected as the main factors causing the error. Compensation is performed by means of peak segmentation and variable cancellation. In the experimental process, compared with the error sampling of the traditional transformer, the error calculated by the current amplitude and phase angle parameters obtained by the all-fiber current transformer is more accurate, and the compensation scheme can suppress the size of the birefringence and improve sensing accuracy of fiber optic current transformers. This study provides a powerful reference for the error analysis of all-fiber current transformer λ/4 wave plates, which is beneficial to promote the better application of such current transformers.

Electronic Current Transformer Test Method Research

2014 ◽  
Vol 530-531 ◽  
pp. 310-315 ◽  
Author(s):  
Han Shu Jiang ◽  
Xu Yu ◽  
Han Jie Wang
Keyword(s):  
Phase Error ◽  
Performance Testing ◽  
Current Transformer ◽  
Original Method ◽  
Test Method ◽  
Electronic Current Transformer ◽  
Electronic Current ◽  
Testing Technology ◽  
Design Characteristics ◽  
Rogowski Coils

With the extensive use of electronic current transformer, check the original method cannot meet the requirements of electronic current transformer performance testing technology. In 500 kV Jincheng a variable electronic current transformer as the test object, the principle and design characteristics of electronic current transformer, proposes an effective test method, ratio and through field test of low power coils and Rogowski coils 2 coil error, phase error and polarity, verify the validity and accuracy of the method.

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