Open Access

ARTICLE

Modeling Rogowski Coils for Monitoring Surge Arrester Discharge Currents

by Nehmdoh A. Sabiha^1,*, Hend I. Alkhammash²

1 Department of Electrical Engineering, Faculty of Engineering, Menoufia University, 32511, Shebin Elkom, Egypt
2 Department of Electrical Engineering, College of Engineering, Taif University, 21944, Taif, Saudi Arabia

* Corresponding Author: Nehmdoh A. Sabiha. Email:

(This article belongs to the Special Issue: Advances in Computational Intelligence and its Applications)

Computer Systems Science and Engineering 2022, 42(2), 439-449. https://doi.org/10.32604/csse.2022.022506

Received 10 August 2021; Accepted 10 September 2021; Issue published 04 January 2022

Abstract

Rogowski coils (RCs) are widely used to measure power or high frequency currents based on their design. In this paper, two types of RCs that are circular (traditional) and cylindrical shapes wound using wire covered by varnish are constructed. This construction is carried out to be suitable for monitoring the discharge current of the surge arrester installed in the distribution system. Concerning high frequency RC modeling for both types considering transfer function is introduced. Self-integrating for both types is attained. Therefore, the experimental tests using function generator for both coils are carried out to identify the parameters of the transfer function representing the introduced model. The measured signals for current and induced voltages are denoised for the parameter identification process. The denoised process is achieved using the MATLAB code ‘wdenoise’ while the parameters are estimated using the system identification toolbox. Verification of the proposed model is achieved using experimental results for the two coils. The sensitivity of the two coils is investigated based on the induced output voltage. The application concerning the two coils for monitoring the discharge current of the surge arrester is done. The results confirm the accuracy of the introduced RC model, as well as the performance of the cylindrical shape, is better than the traditional one. The simulation is carried out using MATLAB and ATPDraw programs.

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Keywords

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