computer simulation of current transformers using a new steel-iron core magnetization model

this paper is concerned with development of a technique for performance prediction of current transformers (ct), accurately. in this technique, a new optimized model from view-point of both computation time and memory is introduced in order to simulate the current transformers on digital computers. the introduced software in this paper in combination with relay tester equipments can be used instead of the actual ct to test different types of protection relays.