Harmonics Detection and Measurement in Power System
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2016, Vol 4, Issue 10
Abstract
In present scenario use of power electronic systems and time-variant nonlinear loads in industry has been increased and hence the harmonics gets resulted in power-line pollution. Thus, it can be said that harmonic voltage and currents in an electric power system appear because of non-linear electric loads. Power supply quality is therefore gets reduced. Harmonics are found to have venomous effects on power system equipments including transformers, capacitor banks, rotating machines, switchgears and protective relays. As the number of harmonics-producing loads has increased over the years, it has become increasingly necessary to detect them when making any changes or additions to a system installation. Hence, reduction of harmonics is considered desirable for analyzing power supply quality. One of the widely used computation algorithm for harmonic analysis is Fast Fourier Transform (FFT). In this paper, the fundamental frequency of 50 Hz is generated using ARM7 and for study purpose, here harmonics are generated by adding various frequencies. This distorted signal is being analyzed using FFT algorithm. The amplitude of harmonics and THD which are computed using the controller is displayed on a graphic LCD. This harmonic detector is tested on various instruments like rotors, power convertors, SMPS. The results from designed system are much agreeing with ideal harmonics analyzing system.
Authors and Affiliations
Snehal R. Durdhavale, Dnyaneshwar D. Ahire
Keywords
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