Description

The 3-winding 3-phase linear transformer with internal tertiary is very similar to its version without internal tertiary. Its advantage is to further spare nodes to optimize computation time by fixing the tertiary winding type to delta.

Table of Contents

Mask and Parameters

General Parameters

Description	Use this field to add all kinds of information about the component
Base primary/secondary/tertiary winding voltage (rmsLL)	Base value for PU conversion (kV). Voltage expressed in kV rms LL This base voltage and nominal voltage will change, if the corresponding winding connection switches between delta and Y.
Base power (total)	Base value for PU conversion (MVA)
Base frequency	Base value for PU conversion (Hz)

Magnetization Impedance Parameters

Rm: Equivalent resistance of iron losses of the magnetic circuit (Ω)
Lm: Magnetization inductance (H)

Winding Parameters

Primary/secondary connection	Winding type Y ground: Grounded Y connection (can use the internal neutral impedance specified in the other tab) Y floating: Floating Y connection Y neutral: Y connection with impedance connected at the input pin N1 or N2 Delta lead: Delta connection with lead of 30° Delta ground: Grounded delta connection (Phase C is grounded) Delta lag: Delta connection with lag of 30°
Tertiary connection	forced to Delta
Voltage (rmsLL)	Rated voltage of the winding (kV) Y connections: Voltage expressed in kV rms LL Delta connections: Voltage expressed in kV rms LL
R1, R2, R3	Leakage resistance of the winding (Ω)
L1, L2, L3	Leakage inductance of the winding (H)

Neutral Impedance Parameters

R1, R2	Neutral resistance of the winding; only applies to Y ground (Ω)
L1, L2	Neutral inductance of the winding; only applies to Y ground (H)
C1, C2	Neutral capacitance of the winding; only applies to Y ground (F)

Ports, Inputs, Outputs and Signals Available for Monitoring

Ports

Net_1	Primary winding connection (supports only 3-phase connections)
Net_2	Secondary winding connection (supports only 3-phase connections)
Net_N1	Neutral connection for primary winding (supports only 1-phase connections)
Net_N2	Neutral connection for secondary winding (supports only 1-phase connections)

Inputs

None

Outputs

None

Sensors

ILMAG(a,b,c)	Magnetization current for each phase (A)
IPRIM(a,b,c)	Primary current for each phase (A)
ISEC2(a,b,c)	Secondary current for each phase (A)
ISEC3(a,b,c)	Tertiary current for each phase (A)

3-Winding 3-Phase Linear Transformer with Internal Tertiary