A New Transformer Diagram

A New Current Transformer Model

This paper presents a current transformer model that is useful on low frequency applications. To describe the iron core magnetic behaviour of the iron core, a hysteresis model is proposed, which is able to generate minor asymmetric loops and remanent flux. The effects of classic eddy current losses and anomalous losses are represented by linear and nonlinear resistors, respectively. The obtaine...

A New Method for Influence Diagram

As innuence diagrams become a popular representational tool for decision analysis, innuence diagram evaluation attracts more and more research interest. In this article, we present a new, two{phase method for innuence diagram evaluation. In our method, an innuence diagram is rst mapped into a decision graph and then the analysis is carried out by evaluating the decision graph. Our method is mor...

Designing of a New Transformer Ground Differential Relay Based on Probabilistic Neural Network

Low- impedance transformer ground differential relay is a part of power transformer protection system that is employed for detecting the internal earth faults. This is a fast and sensitive relay, but during some external faults and inrush current conditions, may be exposed to maloperation due to current transformer (CT) saturation. In this paper, a new intelligent transformer ground differentia...

New Josephson-like effect in a superconductlng transformer

The coupled motion of the vortex lattices of two electrically insulated, superimposed, superconducting thin films Cprimary and secondary) in a perpendicular magnetic field, is predicted to exhibit a Josephson-like behavior. For a dc applied current flowing in the primary film, the voltage difference between the time-averaged primary and secondary flux flow voltages obeys the equations of a resi...

A New Magnetizing Inrush Restraining Algorithm for Power Transformer Protection