Simulation Of Harmonic Currents And Voltages Due To Power Electronics Equipment

Siti Saleha, Abas (2006) Simulation Of Harmonic Currents And Voltages Due To Power Electronics Equipment. Project Report. UTeM, Melaka. (Submitted)

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Abstract

Harmonics can be present in voltage, current or both. Before the end of the century, it is forecast that half of electrical devices will operate with nonlinear current draw. These nonlinear load are cause of current and voltage harmonics in electrical system.. Harmonic currents cause overheating of electrical distribution system wiring, transformer overheating and shortened transformer service life. Loads that producing harmonic currents are electronic lighting ballast, electric arc furnaces, electric welding equipment, industrial process controls, saturated transformer, medical equipment, washing machine, clothes dryer, adjustable speed drives, personal computer and solid state rectifiers. While, harmonic voltages cause havoc or noise within the electrical dist.ri bution system. Noise can be picked up in computer networks, communications equipment and telephone systems when harmonics are at audio or radio frequency. Harmonic current and voltage can be eliminated by using capacitors, filters and mitigating transformer. Besides that, by making sure that the wiring size is as the equipment requirement and system need, the harmonic currents or voltages can be control or eliminate. This project is to make sure that the nonlinear equipment will produce harmonics to the system by using PSCAD simulation software.

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