Title :
A globally continuous state-space representation of switched networks
Author :
Jatskevich, J. ; Wasynczuk, O. ; Walters, E.A. ; Lucas, C.E.
Author_Institution :
Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA
Abstract :
The state variable approach is a numerically efficient and analytically meaningful method of predicting and characterizing the transient responses of power-electronic-based systems. An automated method of establishing state-space models of switched electrical networks is considered. In this modeling approach, the minimal state-space representation of the overall system is generated dynamically as each topology is encountered. Due to the changing topology, the simulation of a switched circuit requires concatenation of the solutions of initial value problems (IVPs) corresponding to time intervals between switching events. In this paper, a transformation of state variables is derived such that the computer-generated equations have the same dimension and the new states are continuous throughout the study. This feature eliminates the need for re-initializing the ODE solver and sets the stage for automated state-space averaging and system-level analysis of switched circuits. The algorithm is verified using a practical example of a synchronous machine-rectifier system
Keywords :
circuit simulation; differential equations; initial value problems; network topology; power electronics; rectifying circuits; state-space methods; switching networks; synchronous machines; transient response; ODE solver; automated method; automated state-space averaging; computer-generated equations; differential equations; globally continuous state-space representation; initial value problems; minimal state-space representation; network topology; numerically efficient method; power-electronic-based systems; state variable approach; state variables transformation; state-space models; switched circuit simulation; switched electrical networks; switched networks; synchronous machine-rectifier system; system-level analysis; time intervals; transient responses; Circuit simulation; Circuit topology; Computational modeling; Discrete event simulation; Equations; Network topology; Power system modeling; Switched circuits; Switching circuits; Transient analysis;
Conference_Titel :
Electrical and Computer Engineering, 2000 Canadian Conference on
Conference_Location :
Halifax, NS
Print_ISBN :
0-7803-5957-7
DOI :
10.1109/CCECE.2000.849772
