1. Classification of phenomena

1.1 Why do we classify phenomena?

We saw in the introduction that the physical phenomena that can occur in a network are numerous and characterized by highly variable frequencies or time constants. It has been shown that accurate simulations of all phenomena are necessary. Whether the simulator used is analog or digital, the first step in developing a simulation is to establish the mathematical model of the system. A complete model, capable of reproducing all phenomena, would have the following characteristics:

• the number of variables would be proportional :

  • the size of the system (number of substations and lines, number of power stations, loads). Today's giant synchronous networks, covering up to an...