A dynamic model of a measuring electromagnetic transformer allowing for the hysteresis, and some practical consequences

摘要

In order to eliminate the influence of the instrumental error of a current transformer on the automatic and protection equipment various methods are used. This paper gives a key to change the direction: from generation of errors to their totalcorrection. Indeed, there is a determinate function i{sub}2 (i{sub}1). while it is practically impossible to supply a distorted secondary current to the secondary winding of the current transformer so as to obtain the true value of the primary current inthe primary winding, one can implement the inverse function i{sub}2 (i{sub}1) by means of digital or analog modelling.