Instrument Transformers Detection and Calibration with Synchronized Phasor Measurements

Abstract

Abstract Instrument transformers with deviation can lead to biased measurements. It causes problems for various applications that use voltage and current measurements. This paper presents a method for detecting and calibrating instrument transformers using synchronized phasor measurements, while the validity of the proposed method is verified via simulation. It is shown that the proposed method can evaluate the instrument transformers and all the Ratio Correction Factors (RCFs) of instrument transformers can be calculated, which can improve the accuracy of measurements. The proposed approach is robust to system uncertainty and noise.