Description
The inductance matrix transformer (IMT) model reproduces the behavior of a three-phase linear transformer at power frequency. This model works with the Transformer data Tab. Based on excitation and short-circuit tests in positive and zero sequences, the tool computes two matrices [R] and [L] modeling the transformer. The Ri and Li are the resistance and self inductance of each coil. Mij are the mutual inductances between coils. HYPERSIM simulates the transformer as mutually-coupled R-L branches. All computing details of matrices [R] and [L] can be found in the Transformer data Tab documentation.
Supports
- A three-limb core representation
- A five-limb core representation
- Internal faults simulation (see 3-Winding Impedance-Matrix-Based Transformer with Internal Fault)
Does not support
- A three single-phase cores representation
- Saturation
Mask and Parameters
General Parameters
The base parameters are computed in the Transformer data Tab.
| Description | Use this field to add information and pertinent details about the component |
| Base primary/secondary/tertiary winding voltage (rmsLL) | Base value for PU conversion (kV); defined in Transformer data Tab (kV).
|
| Base power (total) | Base value for PU conversion (MVA) |
| Base frequency | Base value for PU conversion (Hz) |
Winding Parameters
The R and L matrices as well as the positive- and zero-sequence parameters are computed in the Transformer data Tab.
| Primary/secondary/tertiary connection | Winding type
|
| Rm - positive sequence | Defined in Transformer data Tab (Ω) |
| Rm - zero sequence | Defined in Transformer data Tab (Ω) |
| [R] | Leakage resistance matrix (Ω) |
| [L] | Leakage inductance matrix (H) |
Neutral Impedance Parameters
The neutral impedance parameters are computed in the Transformer data Tab.
| R1, R2, R3 | Neutral resistance of the winding; only applies to Y ground (Ω) |
| L1, L2, L3 | Neutral inductance of the winding; only applies to Y ground (H) |
| C1, C2, C3 | Neutral capacitance of the winding; only applies to Y ground (F) |
Transformer Data
To Learn How to Generate Transformer Parameters See:
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_3 | Tertiary 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) |
| Net_N3 | Neutral connection for tertiary winding (supports only 1-phase connections) |
Inputs
- None
Outputs
- None
Sensors
| IPRIM(a,b,c,n) | Primary current for each phase (A) |
| ISEC2(a,b,c,n) | Secondary current for each phase (A) |
| ISEC3(a,b,c,n) | Tertiary current for each phase (A) |
References
[1] Dommel, H., et al., Electromagnetic Transients Program Reference Manual (EMTP Theory Book), 1986
[2] A transformer model for winding fault studies, Patrick Bastard, Pierre Bertrand, Michel Meunier, IEEE, Vol 9, No 2, April 1994