Different total harmonic distortion effects on current transformer performance

Abstract

The used on non-linear loads devices such as rectifiers, converters or power suppliers in industrial system has increased accordance to the present technology. However non-linear loads are the main problem that suppliers harmonic distortions into the distribution system. Current Transformer is one of protective equipment which will effects when harmonic exist in power system. Total harmonic distortion also can cause the current transformer saturation. This research work investigates the current transformer performance when supplied with difference percentage of total harmonic distortion. Percentage ratio error of current transformer is measured to obtain the accuracy and efficiency of the current transformer. Power System Computer Aided Design (PSCAD) software use to construct, model and simulate the current transformer circuit with total harmonic distortion. The laboratory test with same parameters as simulation software is done to prove the theory state. The current transformer with ratio 15/1A and secondary burden was selected in this research.