Does anyone know if there is an existing three phase, three leg transformer model with hysteresis available in PLECS?
I’m currently building one using the Magnetic Domain library for transformer energisation using a current-limited inverter source, such as a grid-forming inverter (GFM). My main issue is reproducing realistic magnetising inrush current and its harmonic content during energisation while still maintaining reasonable steady-state behaviour.
If anyone has an example model or has done something similar, I’d really appreciate any guidance.
There isn’t a ready-made example for a three-phase three-winding transformer with hysteresis. You can review the transformer in the DFIG Wind Turbine demo for an approach to construct the core out of linear components, which you can build on.
A simplified approach commonly used in power systems studies is to consider saturation and remanence, but not hysterisis. The Saturable Inductor component would be a good candidate for that approach. The transformer library blocks in PLECS use that component to model saturation. However the component lacks a remanence parameter. I have attached a modified version of the Saturable Inductor component with the added remanence parameter, which one could use to modify the transformer models in the PLECS library. Right click component + Link + Break library link so you can edit the components. You can add the remanence to the dialog parameters of the component mask.