The term ‘power quality’ [1-2] refers to the purity of the voltage and current wave-form, and a power quality disturbance is a deviation from the pure sinusoidal form. Harmonics superimposed on the fundamental are one cause of such deviations. Power quality problems [1-2] like voltage harmonics, voltage flickers, voltage sags and voltage swells, current harmonics, current unbalance, reactive cu...

Cancellation is a process by which an interfering source (the “jammer”) is removed from a mixture of sounds on the basis of its structure. This is part of the task of “scene analysis” that confronts natural organisms and artificial devices. Jammer cancellation is distinct from, and complementary to, target enhancement. Time-domain cancellation filters are distinct from, and complementary to, ti...

This paper proposes a new multi-objective framework for optimal placement and sizing of the active power filters (APFs) with satisfactory and acceptable standard levels. total harmonic distortion (THD) of voltage, harmonic transmission line loss (HTLL), motor load loss function (MLLF), and total APFs currents are the four objectives considered in the optimization, while harmonic distortions wit...

Total Harmonic Distortion is a vital part of communications, power distribution, and audio. In it must be kept as low possible. Voltage pollution occurs at the point common coupling, which leads to higher THD. Higher THD ensues thermal stress system where issues in arise. Odd harmonic frequencies, specifically, 5th, 7th, 11th, 13th are primary cause increase Several ways reduce harmonics use re...

WIGGS, JAMES H. Comparison of Ad8pti ve Algorithms for Cancellation of Harmonic Noise on Distribution Power Lines. (Under the direction of Dr. H. J. Trussell.) Adaptive digital filters have been used for many years in speech processin~ echo cancellation, and other areas. The ability of adaptive filters to remove harmonic noise from a contaminated signal, especially when the noise is slowly vary...

Harmonic Distortion in many of the industrial applications are occur primarily owing to enormous utilization loads with high non-linearity like power converters, speed varying drives and arc furnaces. The semiconductor is used achieve variation conversion from one source another. Mostly active filters tuned utilized remove harmonic included current. passive inductance inserted line reduces harm...

This paper presents an innovative active power filter design method to simultaneously compensate the current harmonics and reactive power of a nonlinear load. The power filter integrates a passive power filter which is a RL low-pass filter placed in series with the load, and an active power filter which comprises an RL in series with an IGBT based voltage source converter. The filter is assumed...

The recently introduced proportional-resonant (PR) controllers and filters, and their suitability for current/voltage control of grid-connected converters, are described. Using the PR controllers, the converter reference tracking performance can be enhanced and previously known shortcomings associated with conventional PI controllers can be alleviated. These shortcomings include steady-state er...

This work investigates the effects of RL filters and single-phase Shunt Active Power Filters (SAPFs) on supply load current waveforms their properties. The parameters involved are rms, input Factor (PF) Total Harmonic Distortion (THD). These can describe quality any electrical power system, especially PF THD. focuses implementing both in an radial system due to limited research work. Hence, uti...