Network Transformers

The three-phase transformer library contains models of linear, saturable and tap changer transformers. These models are built using a combination of single-phase transformers with two, three, or four windings. The connections available are the most commonly found. 

These are:

• Y connection “with” or “without” neutral grounding
• Delta connection which can prevent the flow of the zero-sequence current in the other winding(s)
• Zigzag connection in which the windings belonging to two phases are interconnected to induce a phase-shift

The saturation of the magnetic core can be represented together with the hysteresis phenomena if the user is interested in this aspect of the study. The “tap changer” characteristic is also available and is quite useful too in systems with power converters. 

Available transformer models are:

• 2-Winding 3-Phase Saturable Autotransformer with Internal Tertiary 3-Limb
• 2-Winding 3-Phase Saturable Autotransformer with Internal Tertiary
• Phase-Shifting Zigzag Transformer
• 4-Winding 1-Phase Linear Transformer with Tap Changer
• 4-Winding 1-Phase Saturable Transformer
• 4-Winding 1-Phase Linear Transformer
• 3-Winding 3-Phase Saturable Transformer with Tap Changer and Decoupling Element
• 3-Winding 3-Phase Saturable Transformer with Tap Changer
• 3-Winding 3-Phase Saturable Transformer
• 3-Winding 3-Phase Saturable Transformer with Internal Tertiary
• 3-Winding 3-Phase Linear Transformer with Internal Tertiary
• 3-Winding 1-Phase Linear Transformer with Tap Changer
• 3-Winding 1-Phase Saturable Transformer
• 3-Winding 1-Phase Linear Transformer
• 3-Winding Impedance-Matrix-Based Transformer with Internal Fault
• 3-Winding Impedance-Matrix-Based Transformer
• 3-Winding 3-Phase Linear Transformer
• 2-Winding 3-Phase Saturable Transformer with Tap Changer
• 2-Winding 3-Phase Saturable Transformer
• 2-Winding 3-Phase Series/Series Linear Transformer
• 2-Winding 3-Phase Series Saturable Transformer
• 2-Winding 3-Phase Series Linear Transformer
• 2-Winding 1-Phase Linear Transformer with Tap Changer
• 2-Winding 1-Phase Saturable Transformer
• 2-Winding 1-Phase Ideal Transformer
• 2-Winding 1-Phase Linear Transformer
• 2-Winding Impedance-Matrix-Based Transformer
• 2-Winding Impedance-Matrix-Based Transformer with Internal Fault
• 2-Winding 3-Phase Linear Transformer