Degree Name

Master of Engineering


Department of Electrical and Computer Engineering


Modern power semiconductor switching devices are currently used in a wide variety of industrial and domestic applications. With the development in high power semiconductors, large scale power switching circuits will be used increasingly in a variety of electric utility applications. To ensure reliable operation of power electronic circuits, it is necessary to consider the switching characteristics of power semiconductor devices, the switching control and transients of widely different time scales. This invariably makes the analysis and design process very complicated. The availability of powerful digital computers now make it possible to simulate the power electronic circuits operation prior to their fabrication. A well developed computer simulation program allows more convenient and accurate design and analysis of power electronic circuits. This thesis concentrates on the numerical integration methods which are used to solve the differential equations derived for a given power electronic circuit. Different integration methods are examined to demonstrate their capabilities in simulating power electronic circuits. The most commonly used integration algorithms are then compared in terms of accuracy, numerical stability and computation time. These methods are implemented on a power electronic test circuit that is especially tailored to fully test simulation techniques. The results obtained from the test circuit have been used to draw general guidelines for the application of different integration methods as employed for power electronic circuits simulation.