Implement three single-phase, two-winding transformers where all terminals are accessible
The Three-Phase Transformer 12 Terminals block implements three single-phase, two-winding linear transformers where all the twelve winding connectors are accessible. The block can be used in place of the Three-Phase Transformer (Two Windings) block to implement a three-phase transformer when primary and secondary are not necessarily connected in Y or Delta.
The total nominal power of the three phases, in volt-amperes (VA), and the nominal frequency, in hertz (Hz).
The nominal voltage of the three primary windings (labeled 1) in volts RMS (Vrms), the winding resistances, in pu, and the winding leakage reactances, in pu.
The nominal voltage of the three secondary windings (labeled 2) in volts RMS (Vrms), the winding resistances, in pu, and the winding leakage reactances, in pu.
The resistance and reactance simulating the core active and
reactive losses, both in pu. For example, to specify 0.2% of active
and reactive core losses, at nominal voltage, use Rm = 500 pu and
Lm = 500 pu. Lm can be set to
inf (no reactive
core losses), but Rm must have a finite value.
Note Refer to the Linear Transformer for explanations on the per unit system.
an example of use of the Three-Phase Transformer 12 Terminals block
in a three-phase double-bridge voltage-sourced converter.