Case study 4

In this case we present different models for the voltage stability dynamic analysis for a long-term point of view :

Load tap changer transformer model

Fig. 9.- Simulink model for load tap changer transformer (LTC)

Fig. 10.- A typical behavior of LTC obtained with the model presented in the Fig. 9

Thermostatic load model

Fig. 11.- Simulink model for thermostatic load

Fig. 12.- A typical behavior of thermostaatic load obtained with the model presented in the Fig. 11

Synchronous generator with excitation current control model

Fig. 13.- Simulink model for Synchronous generator with excitation current control

Theoretical details:

The full theoretical details of the proposed solution are free available in a pdf file

Software developed :

The free available Simulink program  was implemented to solve the problem