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...

This paper describes the current-detection algorithm based on the time-domain approach for three-phase shunt active power filters (APFs). It aims at eliminating harmonics and/or correct power factor and/or balance asymmetrical loads are analyzed. An overview and assessment of the performance of existing current-detection algorithms for active power filters are presented. According to different ...

In recent years, active filters have been considered and developed for elimation of harmonics in power networks. Comparing with passive, they are smaller and have better compensating characteristics and resistance to line distortions. In this paper, a novel idea based on adaptive filter theory in presented to develop an active filter to eliminate the distortions of an arbitrary signal. Using th...

In recent years, active filters have been considered and developed for elimation of harmonics in power networks. Comparing with passive, they are smaller and have better compensating characteristics and resistance to line distortions. In this paper, a novel idea based on adaptive filter theory in presented to develop an active filter to eliminate the distortions of an arbitrary signal. Using th...

An electric multiple unit (EMU) high-speed train is the dynamic load that degrades power quality in an railway system. Therefore, a improvement system using active filter (APF) must be considered. Due to oscillating current condition, fast and accurate harmonic current-tracking performance required. As such, this paper proposes design of model predictive control (MPC) since minimization cost fu...

This paper designed an adaptive super-twisting sliding mode control (STSMC) scheme based on output feedback fuzzy neural network (OFFNN) for active power filter (APF), aiming at tracking compensation current quickly and precisely, solving the harmonic problem in electrical grid. With use of OFFNN approximator, proposed controller has characteristic full regulation high approximation accuracy, w...

The low harmonic distortion and reduced switching losses are the advantages of using multilevel inverter. For this purpose, three-level inverter is used in paper as a three-phase four-leg shunt active power filter (SAPF). SAPF to eliminate current compensate reactive current, balance load currents under an unbalanced non-linear load. A fuzzy logic controller self-tuning filters (STF) control (A...

In this paper, a proposed efficient solution for an important power quality problem focused on harmonic distortion in the source current is introduced by using Shunt Active Power Filter (SAPF) controlled sinusoidal control strategy which based instantaneous active and reactive theory (Sinusoidal PQ-theory). As part of controller, there PI-Controller enhances APF controller performance when tuni...

This paper investigates the power quality problems which occur frequently in supply and suggests a method to mitigate by implementation of UPQC. P-Q generally concern with voltage sags/swells harmonic currents. Custom Power (CP) devices that these have gained more attention recent decades. UPQC is Designed, modelled setup experimentally sag/swells currents three phase systems. consists Dynamic ...

With the increase of penetration rate renewable energy power generation in system, grid gradually tends to be weak. Under scenario nonlinear load connecting weak grid, grid-side voltage will produce unbalance, distortion and frequency deviation due influence large internal impedance, insufficient inertia, three-phase current unbalance harmonics grid. The operation active filters (APF) under abo...