Modeling Of The Sen Transformer Using An Electromagnetic Transients Program

by Kalyan K. Sen and Mey Ling Sen, Sen Engineering Solutions, Pittsburgh, Penn., How2Power Today, Mar 21 2018

Focus:
The Sen transformer (ST) is an impedance regulator that emulates an impedance in series with an electric power transmission line. The ST connects a compensating voltage in series with the transmission line to modify the magnitude and phase angle of the line voltage so that independent active and reactive power flows can be achieved. In this 28-page article, an ST model is developed using an electromagnetic transients program (EMTP) and executed in the Alternative Transients Program software package. This model preserves the details of an ST configuration that cannot be obtained from a load flow model. The operation of the EMTP model is verified with the model connected to a simple power system network that can easily be upgraded to a utility's more representative power system network. The ST model has relevance to power electronics engineers as the ST competes with power electronics-based impedance regulators. Also presented in this article are some new topologies of ST using two-transformer designs.

What you’ll learn:

• How to model the Sen transformer using an electromagnetic transients program to preserve the details that cannot be obtained from a load flow model which produces steady-state results

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