Filter Design And Harmonic Analysis In Power System

Abstract— Harmonics that are created by non-linear devices connected to the power system. Power system harmonics are multiples integer of the fundamental power system frequency and these harmonic frequencies can create distorted voltages and currents. Distortion of voltages and currents can impact on the power system adversely causing power quality problems. Therefore, approximation of harmonics is of high importance for efficiency of the power system network to maintain the quality limits recommended by standards to protect the sensitive loads, it is necessary to enclosed some form of filtering device to the power system. Harmonics are also increases overall reactive power demanded by equivalent load. Designing of filter is one of the methods to control harmonic alleviation problems and improve power quality by delivering electrical power to the system. This paper presents the evaluation of filter design and harmonic analysis to the system network. Goal of this paper is extraction of fundamental and harmonic components in voltage/current signal using FFT, observed the stylized spectrum of distorted signal in digital analyzer or DSO with power system frequency and design digital filter to minimize the harmonics of power systems.

Keywords - Harmonics, non-linear loads, …show more content…
The presence of harmonics in power system is a major concern to power engineers for many years. Harmonics lead to industrial plant downtimes and power losses. Harmonic is the signal whose frequency is a multiple integer of the fundamental frequency. The highly non-linear devices are the sources of harmonics. Harmonic analysis is used to calculate the impact of harmonic producing loads on a power system [1]. The effect of harmonics on power system can be in the form of power efficiency decreasing, wire overheating, ageing of electrical systems, etc.