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Equivalent Circuits for Practical Transformers

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The practical equivalent circuits of single-phase two-winding transformers exhibit significant deviations from their idealized versions due to the inherent properties of winding resistance and finite core permeability. These properties result in real and reactive power losses, affecting the transformer's performance. Understanding these deviations is crucial for designing more efficient transformers.
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Related Experiment Video

Updated: Jul 13, 2025

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T

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Simplifying Rogowski Coil Modeling: Simulation and Experimental Verification.

Alessandro Mingotti¹, Christian Betti¹, Roberto Tinarelli¹

¹Department of Electrical, Electronic and Information Engineering, Guglielmo Marconi, Alma Mater Studiorum, University of Bologna, Viale del Risorgimento 2, 40136 Bologna, Italy.

Sensors (Basel, Switzerland)

|October 14, 2023

Summary

A new, user-friendly Rogowski coil model simplifies power network analysis by using only datasheet information. This accurate and easily implementable model enhances grid monitoring and simulation capabilities.

Keywords:

Rogowski coil accuracy industrial oriented instrument transformers modelling uncertainty

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Area of Science:

Electrical Engineering
Power Systems Analysis
Measurement Science

Background:

Modern power grids face complexities due to integrating renewable energy sources and electric vehicles.
Enhanced network observability requires advanced sensors and measurement systems at grid nodes.
Real-time power network simulators are essential for predicting electrical behavior.

Purpose of the Study:

To present a new, user-friendly model for Rogowski coils.
To validate the model's simplicity and accuracy using datasheet information.
To facilitate easier implementation in power system simulations.

Main Methods:

Developed a simplified Rogowski coil model based exclusively on datasheet parameters.
Established a clear input/output relationship for the Rogowski coil.
Validated the model through simulations and testing with commercial Rogowski coils.

Main Results:

The proposed Rogowski coil model is demonstrated to be simple and accurate.
The model effectively utilizes datasheet information for output calculation.
Successful validation was achieved using both simulated and real-world measurements.

Conclusions:

The developed Rogowski coil model offers a straightforward and reliable tool for power system analysis.
Its ease of implementation makes it suitable for diverse simulation environments.
The model contributes to improved monitoring and control of complex electrical networks.