Hardware implementation and real time performance evaluation of current transformer saturation detection and compensation algorithms

Abstract This paper presents a hardware implementation of two current transformer (CT) saturation detection methods and one distorted signal reconstruction method. Those methods have been implemented previously only in software. To evaluate the algorithms performance, a real time hardware in the loop system was implemented with several test scenarios forcing CT saturation. The paper highlights the influence of the quantization error generated by the analog-to-digital-converter in the reconstruction of distorted signal process and introduces a method to determine the best parameters to reconstruct the distorted current signal. The methods used have shown precision and high speed in detecting and compensating distorted current signal in real time, even for the worst CT saturation cases.