Load Dynamics

Load dynamics plays a determining role in situations where system behaviour is strongly influenced by the voltage and the frequency.

For that purpose, FAST provides different load models:

• A constant impedance model.
• A model sensitive to voltage and frequency.
• A model suitable for equivalent loads representing a feeder of a distribution network.

This latter load model includes the effect of low voltage level tap regulation.

Besides these possible models, using events, the instructor can change the behaviour of the loads during a training session. Possible events affecting a load or a zone load are:

• Value change.
• Step change.
• Time evolution.

Customised load models can be added according to the context of a project.