PROJECT TITLE :

Estimation of Influence of External Magnetic Field on New Technology Current-to-Voltage Transducers Operating in Protection System of AC Power Networks

ABSTRACT:

High accuracy is required from devices operating in the measuring and protection systems of transmission lines during the transformation of signals. Their immunity to external fields is very necessary because it's an instantaneous influence on the proper functioning of the protection system. During this paper, the electromagnetic current-to-voltage transducers, with coils designed and manufactured using a multilayer high-density interconnect printed-circuit board technology, are presented. The analysis of the influence of the external magnetic field caused by other devices on the proper functioning of the present-to-voltage transducer has been presented. The analysis of the electromagnetic-field distributions has been administrated using the three-D field-circuit methodology based on the finite-component numerical methodology. The magnetic-field distributions and therefore the induced secondary voltages for many different applications are presented. The results are compared with tests of real-life models.