MATLAB SIMPOWERSYSTEMS 5 Manual do Utilizador descarregar pdf (Página 8)

Palestine Polytechnic University

Workshop Matlab/Simulink in Drives and Power electronics – Lecture 418-21 May 2009

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How SimPowerSystems Software Works

– Every time you start the simulation, a special initialization mechanism is

called. This initialization process computes the state-space model of your

electric circuit and builds the equivalent system that can be simulated by

Simulink software.

– This process performs the following steps:

• Sorts all SimPowerSystems blocks. The blocks are separated into linear and

nonlinear blocks, and all electrical nodes received a node number.

• Then, a state-space model (A, B, C, D matrices) of the linear part of the circuit is

computed. All steady-state calculations and initializations are performed at this

stage. Discrete state-space models are computed from the continuous state-space

model, using the Tustin method.

This matrix defines the network algebraic equations.

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