IoT BASED CURRENT MEASURMENT SYSTEM FOR DISTRIBUTION TRANSFORMER SUBSTATION USING ROGOWSKI COIL CURRENT SENSOR

Adelokun C. A; Iloh J.P.I; Okoye J.A; Achebe P.N

Authors & affiliations

Adelokun C. A

Postgraduate Student, Department of Electrical/Electronic Engineering, Chukwuemeka Odumegwu Ojukwu University, Uli Campus, Anambra State, Nigeria.

Iloh J.P.I

Department of Electrical/Electronic Engineering, Chukwuemeka Odumegwu Ojukwu University, Uli Campus, Anambra State, Nigeria.

Okoye J.A

Department of Electrical/Electronic Engineering, Chukwuemeka Odumegwu Ojukwu University, Uli Campus, Anambra State, Nigeria.

Achebe P.N

Department of Electrical/Electronic Engineering, Chukwuemeka Odumegwu Ojukwu University, Uli Campus, Anambra State, Nigeria.

Abstract

Summary

Monitoring of transformer substations in the Nigerian power distribution network is largely done by manned intervention. Outages due to possible fault conditions are only taken account of when reported by customers or discovered through patrol visits. This results in huge logistics and maintenance costs in addition to avoidable downtimes. To address this problem, this study focused on the development of an IoT-based current measurement system for real-time measurement and remote monitoring of load current at a distribution transformer substation. Rogowski coil was adopted as the current sensing device mainly due to its advantage of non-invasive installation method, wide and dynamic range of operation, no ferromagnetic material eliminating magnetic saturation. The coil was characterized through an experimental method. A 300kVA distribution transformer located at the Enugu Electricity Distribution Company (EEDC), Awka Business District Office was used for the experiment. A rogowski coil, high precision digital multimeter and clamp-on ammeter were used to carry out the experiment. Current variations were measured and the corresponding voltage output of the rogowski coil were obtained. The results were used to model the characteristic equation used for programming the ESP8266 microcontroller with inbuilt Wi-Fi-enabled feature. The ThingSpeak platform was used as the web interface for real-time remote monitoring of the transformer load current. The results showed that the system accurately measured the transformer load current and relayed measured values to the ThingSpeak dashboard with errors within ±5%. The study revealed the potential of rogowski coil-based IoT system for modernizing transformer substation monitoring. Such a system can be used to upgrade transformer substation monitoring systems in the Nigerian power distribution sector.

Keywords

Index Terms

Rogowski coil ESP8266 Internet of Things Wi-Fi ThingSpeak.

Citation & details

How to cite this article

Authors: Adelokun C. A, Iloh J.P.I, Okoye J.A, Achebe P.N

Volume/Issue: Volume 9, Issue 2

Pages: 1-16

Published: December 5, 2025

Affiliations: Postgraduate Student, Department of Electrical/Electronic Engineering, Chukwuemeka Odumegwu Ojukwu University, Uli Campus, Anambra State, Nigeria., Department of Electrical/Electronic Engineering, Chukwuemeka Odumegwu Ojukwu University, Uli Campus, Anambra State, Nigeria.

Adelokun C. A, Iloh J.P.I, Okoye J.A, Achebe P.N (2025). IoT BASED CURRENT MEASURMENT SYSTEM FOR DISTRIBUTION TRANSFORMER SUBSTATION USING ROGOWSKI COIL CURRENT SENSOR. International Journal of Innovative Engineering, Technology & Science (IJIETS), Volume 9, Issue 2, 1-16.

Adelokun C. A, Iloh J.P.I, Okoye J.A, Achebe P.N. "IoT BASED CURRENT MEASURMENT SYSTEM FOR DISTRIBUTION TRANSFORMER SUBSTATION USING ROGOWSKI COIL CURRENT SENSOR." International Journal of Innovative Engineering, Technology & Science (IJIETS), vol. Volume 9, Issue 2, 2025, pp. 1-16.

Adelokun C. A, Iloh J.P.I, Okoye J.A, Achebe P.N. "IoT BASED CURRENT MEASURMENT SYSTEM FOR DISTRIBUTION TRANSFORMER SUBSTATION USING ROGOWSKI COIL CURRENT SENSOR." International Journal of Innovative Engineering, Technology & Science (IJIETS) Volume 9, Issue 2 (2025): 1-16.

@article{iotbasedcurrentmeasurmentsystemfordistributiontransformersubstationusingrogowskicoilcurrentsensor2025, author = {Adelokun C. A and Iloh J.P.I and Okoye J.A and Achebe P.N}, title = {IoT BASED CURRENT MEASURMENT SYSTEM FOR DISTRIBUTION TRANSFORMER SUBSTATION USING ROGOWSKI COIL CURRENT SENSOR}, journal = {International Journal of Innovative Engineering, Technology & Science (IJIETS)}, year = {2025}, volume = {Volume 9, Issue 2}, pages = {1-16} }

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Published: December 5, 2025
Volume/Issue: Volume 9, Issue 2
Pages: 1-16

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