International Journal of Information and Communication Technology Research

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International Journal of Information and Communication Technology Research


Total Harmonic Distortion and Power Loss Reduction in DPF Mode Operation of Harmonic Passive Filters under Presence of Nonlinear Loads in Electrical Power System

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Author(s) Hossein Nasiraghdam, Morteza Nasiraghdam, M.Mohammadi
On Pages 216-221
Volume No. 4
Issue No. 6
Issue Date June, 2014
Publishing Date June, 2014
Keywords Harmonics, total voltage distortion, power loss, passive filter


Abstract


The harmonic problems are mainly due to the substantial increase of nonlinear loads due to technological advances, such as the use of power electronic circuits and devices, in ac/dc transmission links, or loads in the control of power systems using power electronic or microprocessor controllers. Voltage distortion, overloaded neutrals and capacitors, telephone and communication system noise, increased power losses and thermal stress are the main effects of harmonics in power system. Passive filters are inductance, capacitance, and resistance elements configured and tuned to control harmonics and can be classified into tuned filters and high-pass filters. Installation of such a passive filter in the vicinity of a non-linear load is to provide low-impedance paths for specific harmonic frequencies, thus resulting in absorbing the dominant harmonic currents flowing out of the load. In this research the performance of a dedicated passive filter (DPF) for each phase of non-linear load is investigated and the most effective method which could lead to improve voltage distortion and to decrease power losses is presented.

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