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In this study, a comparison of various insulated gate bipolar transistor (IGBT) models for field-programmable gate array (FPGA)-based real-time simulation of power electronic devices is presented. System-level behavioural models include ideal, switching function and averaged models, and the detailed device-level model includes both linear behavioural and non-linear look-up table-based models of IGBT. A three-level 12-pulse voltage source converter system driving a squirrel-cage induction motor has been chosen as the test case system. The entire system including the controller and pulse width modulation (PWM) is implemented on a single FPGA using very high-speed description language in real-time at a fixed time-step of 12.5 ns. The Altera Startix III FPGA is the device used for real-time simulation. Results obtained through all five models are compared and as expected, it has been found that the behaviour-mode simulation is fast but comes with a sacrifice of accuracy and details. A guideline is provided for the users with suggestions, so that the right kind of model can be selected for a particular study. [ABSTRACT FROM AUTHOR]

This study presents a methodology for analysing the transient behaviour of harmonics associated with the interfacing of a synchronous generator and a transmission line. The algorithm is derived entirely in the dynamic harmonic domain that is based on an orthogonal basis and on operational matrices. The main characteristics of the proposed method are: its capability to accurately follow the harmonic content of a transient without the aid of a post-processing tool and its ability to serve as a visually active indicator of the steady-state and transient conditions in a signal. The proposed method is validated by comparing its results against those obtained through a time-domain technique. [ABSTRACT FROM AUTHOR]

A fast and stable approach for the simulation of transformer nonlinearities during transient and unbalanced operating conditions is given. The proposed scheme implements separate magnetic and electric equivalent circuits. The solution of the transformer nonlinear mathematical model is carried out using the Newton-Raphson iterative method. Introducing the magnetic circuit nonlinearities into the model as either continuous or piecewise functions eliminated the difficulty of the Jacobian formation. The method was verified against experimental and computed results. The application of the Jacobian iterative method increased the stability and convergence of the solution as compared to a predictor corrector scheme. The proposed method was able to accurately simulate the transformer behaviour under switching and no-load conditions. [ABSTRACT FROM AUTHOR]