Three-Phase Transformer 12 Terminals
Implement three single-phase, two-winding transformers where all terminals are accessible
Simscape / Electrical / Specialized Power Systems / Power Grid Elements
The Three-Phase Transformer 12 Terminals block implements three single-phase, two-winding linear transformers where all the 12 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.
- [Three-phase rated power Frequency]
The total nominal power of the three phases, in volt-amperes (VA), and the nominal frequency, in hertz (Hz). Default is
[ 10e6 60 ].
- Winding 1: [phase voltage R X]
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. Default is
[ 10e3 0.002 0.05 ].
- Winding 2: [phase voltage R X]
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. Default is
[ 25e3 0.002 0.05].
- Magnetizing branch: [Rm Xm]
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. Default is
[ 200 200 ].
Refer to the Linear Transformer for explanations on the per unit system.