Bruce A. Mork

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A new topologically correct hybrid transformer model is developed for low and midfrequency transient simulations. Power transformers have a conceptually simple design, but behaviors can be very complex. The selection of the most suitable representation for a given behavior depends on the type of transformer to be simulated, the frequency range, and other(More)
The paper documents a new transformer model in ATPDraw called XFMR. This model handles 3-phase transformers with two or three windings. Autotransformers and all Wye and Delta couplings are supported. The model includes an inverse inductance matrix for the leakage description, optional frequency dependent winding resistance, capacitive coupling, and a(More)
This paper presents a summary of a literature search performed by the authors as part of an ongoing research project aimed at developing more reliable models for representing transformers in lowand mid-frequency transients. The document includes a summary of models proposed to date, as well as modeling guidelines for nonlinear and frequency dependent(More)
Transient disturbances in power systems may damage key equipment, potentially having a great impact on system reliability. These transients may be introduced during normal switching operations, interruption of short circuits, lightning strikes, or due to equipment failure. Phasor analysis or other simplified analysis methods are usually inadequate due to(More)
The ability to predict or confirm ferroresonance depends primarily on the correctness of the transformer model used by the computer simulation. Ferroresonance is introduced and a general modeling approach is given. An overview of available literature and contributors to this area is provided. A simple case of ferroresonance in a single phase transformer is(More)
Executive Summary In addition to the research and experimentation need to understand the basic control features of an SVC, much effort was also expended on learning the Matlab simulation software. While the Matlab SimPowerSystems and Simulink libraries contain many easily recognizable built-in control blocks, learning how each block worked required careful(More)
........................................................................................................III ACKNOWLEDGMENT ....................................................................................... IV TABLE OF CONTENTS ...................................................................................... V LIST OF FIGURES(More)
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