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4-Winding 1-Phase Linear Transformer with Tap Changer
Description
Transformer models with tap changer are designed to be used when the voltage needs to be set. This is often the case with electronic power converters. The 4-winding linear transformer is best used when the simulation of saturation can be avoided as it can save computation time.
Mask and Parameters
General Parameters
| Description | Use this field to add all kinds of information about the component |
| Base primary/secondary/tertiary/quaternary winding voltage (rmsLN) | Base value pour PU conversion (kV) |
| Base power (total) | Base value pour PU conversion (MVA) |
| Base frequency | Base value pour PU conversion (Hz) |
Magnetization Impedance Parameters
- Rm: Equivalent resistance of iron losses of the magnetic circuit (Ω)
- Lm: Magnetization inductance (H)
Winding Parameters
| Voltage (rms) | Rated voltage of the winding (kV) |
| R1, R2, R3, R4 | Leakage resistance of the winding (Ω) |
| L1, L2, L3, L4 | Leakage inductance of the winding (H) |
Tap Changer Parameters
The tap changer effect is simulated by changing the transformer ratio.
| Control type | Source of the command Internal (control model): The parameter "Manual tap position" defines the set point for the tap. It is reached after the temporization and operation times. External (input pins): The parameter "Manual tap position" defines the initial value of the tap and is not used thereafter. The temporization and operation times apply to the external control. |
| Manual position | Manual position required; either a set point or initial value depending on the control type |
| Number of taps | Number of tap(s); maximum 50 |
| Nominal tap | Tap position at which nominal values are set |
| Tap size (% of base voltage) | Tap voltage increment value in reference to the primary base voltage (%) |
| Temporization time | Minimum duration required for a signal order to start changing tap (s) |
| Operation time | Time between tap changes (s) |
Ports, Inputs, Outputs and Signals Available for Monitoring
Ports
| Net_1+ | Positive primary winding connection (supports only 1-phase connections) |
| Net_1- | Negative primary winding connection (supports only 1-phase connections) |
| Net_2+ | Positive secondary winding connection (supports only 1-phase connections) |
| Net_2- | Negative secondary winding connection (supports only 1-phase connections) |
| Net_3+ | Positive tertiary winding connection (supports only 1-phase connections) |
| Net_3- | Negative tertiary winding connection (supports only 1-phase connections) |
| Net_4+ | Positive quaternary winding connection (supports only 1-phase connections) |
| Net_4- | Negative quaternary winding connection (supports only 1-phase connections) |
Inputs
- U: "Up" control input; changes one position
- D: "Down" control input; changes one position
Outputs
- Pos: Tap position
Sensors
| D | "Down one position" order from control input or internal command |
| ILMAG | Magnetization current (A) |
| IPRIM | Primary current (A) |
| ISEC2 | Secondary current (A) |
| ISEC3 | Tertiary current (A) |
| ISEC4 | Quaternary current (A) |
| Tap | Tap position |
| U | "Up one position" order from control input or internal command |
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