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Title HarmoSim: A tool for harmonic distortion simulation and assessment of non-linear loads
Author José Baptista, Raul Morais, António L. G. Valente, Salviano F. S. P. Soares, João Miguel Pinto Candeias, Manuel J. C. S. Reis
Journal Computer Applications in Engineering Education
Month June
Year 2011
DOI 10.1002/cae.20559
Group Information Systems and Processing
Group (before 2015) Signal Processing Laboratory
Indexed by ISI Yes


Electrical Power Quality (PQ) is a crucial competitive and developing factor to all economic areas. The economic impact resulting from a bad PQ would be drastic to all consumers. Computers, uninterruptible and switched power supplies (UPS), and fluorescent lamps/tubes are examples of non-linear loads that have the consumption of a non-sinusoidal current, which cause disturbances in the power supply system (that may be sever or not). This paper discusses residential generic power circuitry analysis and simulation, under non-linear loads, in connection with undergraduate electrical engineering education. It briefly reviews some of the basic techniques, and presents a software tool that has been found very useful in the context. The tool has an easy-to-use, friendly interface, and can be used to teach design techniques or as a laboratory support to study the applicability of known methods to real situations. The students can perform simulations with their own data on Microsoft™ Windows® based platforms.