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Two high accuracy digital integrators for Rogowski current transducers.

Pan-dian Luo¹, Hong-bin Li¹, Zhen-hua Li¹

¹SEEE of Huazhong University of Science and Technology, Wuhan 430074, China and State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Wuhan 430074, China.

The Review of Scientific Instruments

|February 13, 2014

Summary

This summary is machine-generated.

This study introduces improved digital integrators for Rogowski current transducers, enhancing AC current measurement accuracy. These new methods overcome limitations of traditional analog and basic digital integrators, offering superior stability and precision.

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Area of Science:

Electrical Engineering
Signal Processing

Background:

Rogowski current transducers are vital for AC measurement but limited by analog integrator instability and environmental sensitivity.
Existing digital integrators suffer from DC component accumulation, causing output drift and offset issues.

Purpose of the Study:

To propose and validate two novel digital integrators for Rogowski current transducers.
To enhance AC current measurement accuracy by addressing limitations of traditional integrators.

Main Methods:

Development of two improved digital integrators based on the Al-Alaoui integrator.
Integration of a proportional-integral-derivative (PID) feedback controller and an attenuation coefficient.
Simulation modeling for verification and comparison with traditional methods.

Main Results:

The improved digital integrators demonstrate superior long-term stability and environmental resilience compared to analog integrators.
Achieved higher accuracy in steady-state and transient-state responses.
Successfully mitigated DC drift and offset issues inherent in conventional digital integrators.

Conclusions:

The proposed digital integrators offer a significant advancement for accurate AC current measurement using Rogowski transducers.
These methods provide a robust solution for applications demanding high precision and stability under varying conditions.