New Control Algorithm for Single-Phase Series Active Power Filter

Teixeira, Nuno F.; Pinto, J. G.; Freitas, Marta; Afonso, João L.

doi:10.1080/15325008.2015.1051166

Cited by 13 publications

(18 citation statements)

References 30 publications

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“…The use of active filters has been suggested and a method extracting each harmonic and interharmonic current reference with 5 Hz resolution has been proposed in [6,7] by using multiple synchronous reference frame (MSRF) technique. Active power filters (APF) have been a hot research topic for nearly three decades due to their superiorities to passive harmonic filters [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. There are various APF types, summarized in [10], and they are classified with respect to their circuit topology and application area.…”

Section: Problem Definitionmentioning

confidence: 99%

“…There are various APF types, summarized in [10], and they are classified with respect to their circuit topology and application area. While [11,12] utilize series APFs, shunt APF systems are proposed in [13][14][15][16][17][18][19][20] in order to mitigate unwanted voltage and current harmonics, respectively. APF can also be used together with passive filters as hybrid active power filters (HAPF) [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

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Suppression of the Second Harmonic Subgroup Injected by an AC EAF: Design Considerations and Performance Estimation of a Shunt APF

et al. 2018

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This paper proposes a design methodology for an active power filter (APF) system to suppress the second harmonic subgroup injected by an AC electric arc furnace (EAF) to the utility grid. The APF system is composed of identical parallel units connected to the utility grid via a specially-designed coupling transformer. Each APF converter is a three-phase three-wire two-level voltage source converter (VSC). The number of parallel APF units, coupling transformer MVA rating, and turns ratio are optimized in the view of the ratings of commercially-available high voltage (HV) IGBTs. In this research work, line current waveforms sampled at 25.6-kS/s on the medium voltage (MV) side of a 65-MVA EAF transformer are then used to extract the second harmonic subgroup, 95-, 100-, and 105-Hz current components, by multiple synchronous reference frame (MSRF) analysis, which was previously proposed to decompose EAF current interharmonics and harmonics in real-time. By summing up this digital data of the second harmonic subgroup, the reference current signal for the APF system is produced in real-time. A detailed model of the APF system is then run on EMTDC/PSCAD to follow the produced reference current signal according to hysteresis band control philosophy. The simulation results show that the proposed APF system can successfully suppress the second harmonic subgroup of an AC EAF.

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Section: Problem Definitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Suppression of the Second Harmonic Subgroup Injected by an AC EAF: Design Considerations and Performance Estimation of a Shunt APF

et al. 2018

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“…Even though good results could be obtained, clear criteria for the selection of components or hysteresis boundary conditions are not presented. Another SAPF that does not employ an external dc-link power supply and coupling transformer is introduced in [22], which is based on a digital control system comprising the grid synchronization procedure, compensation voltage calculation, damping algorithm, and deadtime compensation. The modeling and tuning process of the required controllers is not detailed [22].…”

Section: Introductionmentioning

confidence: 99%

“…But their mathematical modeling approach did not yield an equivalent electrical circuit which could be useful and easily analyzed to derive transfer functions or evaluate disturbances effects. A simplified mathematical modeling approach for a SAPF neglecting the converter operating stages is presented by [22] in which there is no detailed information on calculations of gain parameters and constants used by its controllers. An extended mathematical model for a SAPF without coupling transformer and external power source is presented in [23].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Experimental Validation of a Single-Phase Series Active Power Filter for Harmonic Voltage Reduction

et al. 2019

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Research advances on renewable energy systems have increased the interest in the use of isolated power supplies composed of power converters based on high-frequency transformers. Such power equipment generally presents high internal impedance, which amplifies the effects of harmonic voltages produced by nonlinear loads that draw currents with high harmonic content. Some sensitive loads, e.g., electric motors and distribution transformers, may not properly operate when supplied by extremely distorted voltages. Series active power filters (SAPFs) are suitable to mitigate this inconvenient, being capable of providing harmonic voltage compensation and minimizing the distortion of supply voltages. In this context, this work addresses the small-signal modeling, control system implementation, and experimental validation of a single-phase SAPF. The proposed approach is solely employed for harmonic voltage compensation purposes, thus allowing loads to be supplied by a nearly sinusoidal voltage. During the modeling process, the operating steps are analyzed in detail, while the presence of parasitic elements is taken into account. An equivalent circuit is also derived, which is used to provide an easy understanding of the interactions among the SAPF, load, and power supply. From this model, transfer functions can be obtained so that it is possible to design the control loops used by the SAPF. Experimental results with distinct types of loads are presented to evaluate the SAPF performance in both steady-state and transient conditions. INDEX TERMS Harmonic voltage filtering, voltage quality, series active power filter, small-signal modeling, voltage-source inverter.

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“…The principle of the series APF is injecting compensation components in order to cancel the voltage deformations at the PCC. The performances of the series APFs are directly depending on the proposed control strategy and the reference extraction methods (Venkatraman et al 2017;Taheri et al 2019;Teixeira et al 2015;Asadi and Jalilian 2015). In this regard, a great deal of interest has been devoted to the problem of controlling energy systems involving the series APFs, in order to satisfy voltage quality requirements and regulate the DC bus voltage.…”

mentioning

confidence: 99%

Adaptive Nonlinear Control of Three-Phase Series Active Power Filters with Magnetic Saturation

Ouadi

Aitchihab

Giri

2020

J Control Autom Electr Syst

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The problem of controlling three-phase series active power filters (series APF) is addressed in the presence of nonlinear loads. In previous works, the control design for series APF is generally based on standard models that assume the involved magnetic coil to be linear. In reality, the magnetic characteristics of these components are nonlinear. In this paper, a new model for series APF load system, taking into account for the nonlinearity of coil characteristics, is developed. Based on the new model, a nonlinear adaptive controller is developed, using the backstepping design. The control objectives is twofold: (i) compensating for the harmonic and disturbed voltages components at the point of common coupling, this objective is referred to network voltage quality; and (ii) regulating the inverter DC capacitor voltage. Moreover, the controller is made adaptive for compensating the uncertainty on the switching loss power. The performances of the proposed adaptive controller are formally analyzed using tools from the Lyapunov stability and average theory. The supremacy of the proposed controller with respect to standard control solution is illustrated through simulation. Keywords Adaptive control • Active power filters • Magnetic saturation • Voltage quality • Lyapunov stability • Average model 1 Introduction Several industrial and residential applications (such as switching power supplies, motor drivers and medical equipment, among others) are very sensitive to voltage network fluctuations. Indeed, the presence of these disturbances leads to problems of synchronization with line voltage, responsible for systems malfunctions. Moreover, the nonlinear load contributes strongly to generating disturbing voltage components. In fact, the circulation of current harmonics components through the line conductors generates additional voltage distortions at the point of common coupling (PCC). These voltage distortions are manifested by flickers, dips, interruptions and voltage harmonics, which are harmful for B A.

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New Control Algorithm for Single-Phase Series Active Power Filter

Cited by 13 publications

References 30 publications

Suppression of the Second Harmonic Subgroup Injected by an AC EAF: Design Considerations and Performance Estimation of a Shunt APF

Suppression of the Second Harmonic Subgroup Injected by an AC EAF: Design Considerations and Performance Estimation of a Shunt APF

Modeling and Experimental Validation of a Single-Phase Series Active Power Filter for Harmonic Voltage Reduction

Adaptive Nonlinear Control of Three-Phase Series Active Power Filters with Magnetic Saturation

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