Tutorial on how to define the saturable core element. The six signals obtained at the output of the multimeter are the three currents in the circuit breaker and the three fluxes inside the core of the saturable transformer. Consider an inductor of 2 henries designed to operate at a nominal voltage, vnom 120 v rms, and a nominal frequency, fnom 60 hz. One phase of a threephase transformer is connected on a 500 kv, 5000 mva network. The per unit conversion is based on the transformer rated power pn in va, nominal frequency fn in hz, and. It can be run both under interactive sessions and as a batch job. Specify the units used to enter the parameters of the multiwinding transformer block. Once the circuit was built in matlab, simulations were run to. H curve tool psim provides a convenient way to define the parameters of a saturable core element. A modified version of this example exists on your system.
Matlab i about the tutorial matlab is a programming language developed by mathworks. Sensors and actuators a 123124 2005 430437 application of. It started out as a matrix programming language where linear algebra programming was simple. The transformer is rated 500 kv230 kv, 450 mva 150 mva per phase. In the following sections, a simple saturable inductance and a nonlinear resistance serve as examples. By connecting the air gap element in series with the core, we have the model for the inductor. A threephase transformer is energized on a 500 kv network. This tutorial gives you aggressively a gentle introduction of matlab programming language. Measured data provided was used in matlab to construct the curves for the nonlinear inductors and nonlinear resistors. The hysteresis curve of the saturable inductor was created by using a nonlinear inductor and a nonlinear resistor in parallel as a substitute for saturable inductors. The simulated bh curve from the saturable core model creating the inductor model. This example shows the transformer saturation phenomenon. The flux on phase a is also obtained by integrating the phase a voltage at the unloaded output of winding two.