New digital reference current generation for shunt active power filter under distorted voltage conditions

Abdusalam, Mohamed Muftah; Poure, Philippe; Karimi, Shahram; Saadate, Shahrokh

doi:10.1016/j.epsr.2008.10.009

Cited by 120 publications

(106 citation statements)

References 8 publications

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“…As shown in [2], if the current control is made by hysteresis, the above mentioned drawback can be limited with a dynamic offset level added to both limits of the hysteresis band.…”

Section: Active Power Conditioner Topologiesmentioning

confidence: 99%

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Three-Phase Four-Wire Active Power Conditioners for Weak Grids

Vechiu¹,

Bălănuță²,

Gurguiatu³

2013

IJCEE

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Abstract-A micro-grid is a weak electrical grid, which can be easily subject to disturbances because it includes a variety of intermittent power sources, single-phase, three-phase and nonlinear loads, which can have a dynamic impact on power quality. The unbalance and the harmonic components in current and voltage waveforms are the most important among these. In this paper, the topologies and the control strategy of two Active Power Conditioners (APC) have been investigated in order to improve the operation of a micro-grid. The APC topologies presented in this paper act as an interface between renewable energy sources and the AC bus of a micro-grid. They also use an improved control strategy, which makes possible to inject energy in the micro-grid, compensate the current harmonics and correct the power factor. Moreover, the proposed control strategy allows the line current at the point of common coupling (PCC) to be balanced and sinusoidal even when the load is unbalanced. Consequently, the voltage at the PPC becomes balanced. The validity of the innovative control strategy has been proved in simulation using Matlab/Simulink environment.

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“…As shown in [2], if the current control is made by hysteresis, the above mentioned drawback can be limited with a dynamic offset level added to both limits of the hysteresis band.…”

Section: Active Power Conditioner Topologiesmentioning

confidence: 99%

“…The APC has proved to be an important alternative to compensate current and voltage disturbances in power distribution systems [2], [3]. Different APC topologies have been presented in the technical literature [4], but most of them are not adapted for micro-grids applications.…”

Section: Introductionmentioning

confidence: 99%

Three-Phase Four-Wire Active Power Conditioners for Weak Grids

Vechiu¹,

Bălănuță²,

Gurguiatu³

2013

IJCEE

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“…To date, the conventional STF-pq theory algorithm still produces a non-sinusoidal reference current [7,40,42] and thus forces the SAPF to operate based on a direct current controlled (DCC) scheme [43][44][45]. From previous literature [45][46][47], it is revealed that the SAPF switching operation produces switching ripples which potentially degrade the THD value of the mitigated source current.…”

Section: Introductionmentioning

confidence: 99%

“…In the context of STF-pq theory algorithms, for effective generation of reference currents, another STF is commonly implemented to process the transformed set of load currents [40,42]. However, the performance of STF is fully dependent on its fixed gain value which is normally obtained via an empirical approach.…”

Section: Introductionmentioning

confidence: 99%

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A Refined Self-Tuning Filter-Based Instantaneous Power Theory Algorithm for Indirect Current Controlled Three-Level Inverter-Based Shunt Active Power Filters under Non-sinusoidal Source Voltage Conditions

et al. 2017

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Abstract:In this paper, a refined reference current generation algorithm based on instantaneous power (pq) theory is proposed, for operation of an indirect current controlled (ICC) three-level neutral-point diode clamped (NPC) inverter-based shunt active power filter (SAPF) under non-sinusoidal source voltage conditions. SAPF is recognized as one of the most effective solutions to current harmonics due to its flexibility in dealing with various power system conditions. As for its controller, pq theory has widely been applied to generate the desired reference current due to its simple implementation features. However, the conventional dependency on self-tuning filter (STF) in generating reference current has significantly limited mitigation performance of SAPF. Besides, the conventional STF-based pq theory algorithm is still considered to possess needless features which increase computational complexity. Furthermore, the conventional algorithm is mostly designed to suit operation of direct current controlled (DCC) SAPF which is incapable of handling switching ripples problems, thereby leading to inefficient mitigation performance. Therefore, three main improvements are performed which include replacement of STF with mathematical-based fundamental real power identifier, removal of redundant features, and generation of sinusoidal reference current. To validate effectiveness and feasibility of the proposed algorithm, simulation work in MATLAB-Simulink and laboratory test utilizing a TMS320F28335 digital signal processor (DSP) are performed. Both simulation and experimental findings demonstrate superiority of the proposed algorithm over the conventional algorithm.

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Application of the modified IDA‐PBC for shunt active power filters control

Serra¹,

Angelo

Forchetti

2016

Circuit Theory & Apps

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Summary The design of a passivity‐based nonlinear controller for a shunt active power filter to be used for the compensation of harmonic currents consumed by nonlinear loads is presented in this paper. The main objective of designed controller is to inject the necessary compensation current into the system so that the grid current is sinusoidal and balanced, regardless of whether the grid voltage is unbalanced and/or distorted. The references for the compensation currents are obtained from applying the pq theory. The controller is designed on the basis of a modified interconnection and damping assignment technique, which allows solving a tracking control problem. An integral action controller is added to the proposed controller using the same design technique, in order to eliminate the errors produced by parameter variations or uncertainties. The behavior of the proposed control strategy is validated through simulation using a realistic model, which includes converter switching and losses, grid distortion, and parameter variations. Copyright © 2016 John Wiley & Sons, Ltd.

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New digital reference current generation for shunt active power filter under distorted voltage conditions

Cited by 120 publications

References 8 publications

Three-Phase Four-Wire Active Power Conditioners for Weak Grids

Three-Phase Four-Wire Active Power Conditioners for Weak Grids

A Refined Self-Tuning Filter-Based Instantaneous Power Theory Algorithm for Indirect Current Controlled Three-Level Inverter-Based Shunt Active Power Filters under Non-sinusoidal Source Voltage Conditions

Application of the modified IDA‐PBC for shunt active power filters control

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