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Three-Phase On-Line Tap Changing Regulating Transformer

version (25.5 KB) by Patrice Brunelle
Simscape model of a on-line tap changing (OLTC) regulating transformer in SimPowerSystems.


Updated 20 Oct 2011

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This demo illustrates use of both SimPowerSystems and Simscape to model a On-Load Tap Changing (OLTC) 120/25 kV transformer regulating voltage on a three-phase 25-kV distribution network.

The demo is similar to the power_OLTCregtransformer demo of SimPowerSystems. However, instead of using Multi-Winding Transformer and Breaker blocks to perform tap selection, the OLTC regulating transformer provided in this model exploits Simscape flexibility to model a variable ratio transformer, thus avoiding use of switches. With this new model you can easily change the number of taps.

The model is connected to the SimPowerSystems network through Simscape Interface Elements blocks of powerlib library.

Author: Gilbert Sybille, Hydro-Québec (IREQ)

Cite As

Patrice Brunelle (2021). Three-Phase On-Line Tap Changing Regulating Transformer (, MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2011b
Compatible with any release
Platform Compatibility
Windows macOS Linux

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