Three-phase four-wire hybrid power filter using a smaller power converter

Wu, Jinn‐Chang; Jou, Hurng‐Liahng; Wu, Kuen-Der; Hsiao, Hsin-Hsing

doi:10.1016/j.epsr.2012.01.001

Cited by 23 publications

(18 citation statements)

References 14 publications

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“…5. In this work the z-plane implementation of (10) is realised by applying the bilinear transform with frequency pre-warping to (12). This discretization method has been selected because it preserves, with relatively good accuracy, the resonant frequency and the phase margin of the original design in the "s" plane [26] [34].…”

Section: A Control System Designmentioning

confidence: 99%

“…Other effects of imbalance are localised heating in machines and power converters, and reduced loadability of conventional synchronous generators (see [10] [11]) which affects the stability of the MGs [11]. The zero sequence current flowing through the neutral wire can produce additional problems such as overloading of the neutral conductor [9] [12] and malfunction of sensitive equipment due to ground voltage fluctuations if the current flowing through the neutral wire is large and/or the impedance of the neutral connection has a relatively large magnitude [9] [12]. In addition the load served by a 4-leg MG could be of nonlinear nature [12] [13] [14], generating distorted load currents which could also diminish the loadability of the power generating sources in the microgrid.…”

Section: Introductionmentioning

confidence: 99%

“…Several solutions have been proposed in the literature to compensate imbalance and harmonic distortion [15] [16] [17]. Among them Active Power Filters (APFs) are considered appropriate topologies with several papers discussing issues such as the design of APF's passive components [6] [12], compensation objectives [8] [18], serial and/or parallel connection of APFs [6], etc. The performance of the APF is heavily dependent on the control system applied which is usually based on a power theory, with many applications using the p-q or modified p-q power theories.…”

Section: Introductionmentioning

confidence: 99%

“…The zero sequence current flowing through the neutral wire can produce additional problems such as overloading of the neutral conductor [9] [12] and malfunction of sensitive equipment due to ground voltage fluctuations if the current flowing through the neutral wire is large and/or the impedance of the neutral connection has a relatively large magnitude [9] [12]. In addition the load served by a 4-leg MG could be of nonlinear nature [12] [13] [14], generating distorted load currents which could also diminish the loadability of the power generating sources in the microgrid. Several solutions have been proposed in the literature to compensate imbalance and harmonic distortion [15] [16] [17].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Evaluation of a CPT-Based Four-Leg Active Power Compensator for Distributed Generation

Burgos-Mellado

Hernandez-Cariman

Cárdenas

et al. 2017

IEEE J. Emerg. Sel. Topics Power Electron.

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Abstract -Four-wire microgrids and distribution systems are inherently unbalanced with the presence of negative and zero sequence components in voltages and currents. In small autonomous systems the imbalance, in addition to the harmonic distortion produced by non-linear loads, can significantly affect power quality, loadability and stability of the system. Furthermore, in isolated networks with significant generation from intermittent renewable energy sources, the stiffness of the system is reduced and this could amplify the effects of imbalance on the stability and power quality. To mitigate some of these problems, a novel methodology based on the application of a 4-leg Active Power Filter (APF) is proposed in this paper. The control of the compensator is based on the Conservative Power Theory (CPT) augmented by Resonant Controllers. The behaviour of the proposed system is demonstrated using an experimental prototype deployed in a laboratory scale microgrid Index Terms-Active power filter, conservative power theory, resonant control, microgrids, imbalance, harmonic distortion.

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Section: A Control System Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Evaluation of a CPT-Based Four-Leg Active Power Compensator for Distributed Generation

Burgos-Mellado

Hernandez-Cariman

Cárdenas

et al. 2017

IEEE J. Emerg. Sel. Topics Power Electron.

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show abstract

“…Some of the key practical limitations are as follows: Large amounts of harmonic current saturate or overload the filter and cause series resonance with the AC source, thereby resulting in excessive harmonic flow into the PFs. -PFs amplify source-side harmonic contents because of the impedance in the source of parallel and series negative resonances between the grid and the filter [29]. -The design parameters of PFs in an AC system depend on the system operating frequency, which changes around its nominal value according to variable load conditions.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Power Quality Issues Due to High Penetration of Renewable Energy Sources in Electric Grid Systems Using Three-Phase APF/STATCOM Technologies: A Review

et al. 2018

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Abstract:This study summarizes an analytical review on the comparison of three-phase static compensator (STATCOM) and active power filter (APF) inverter topologies and their control schemes using industrial standards and advanced high-power configurations. Transformerless and reduced switch count topologies are the leading technologies in power electronics that aim to reduce system cost and offer the additional benefits of small volumetric size, lightweight and compact structure, and high reliability. A detailed comparison of the topologies, control strategies and implementation structures of grid-connected high-power converters is presented. However, reducing the number of power semiconductor devices, sensors, and control circuits requires complex control strategies. This study focuses on different topological devices, namely, passive filters, shunt and hybrid filters, and STATCOMs, which are typically used for power quality improvement. Additionally, appropriate control schemes, such as sinusoidal pulse width modulation (SPWM) and space vector PWM techniques, are selected. According to recent developments in shunt APF/STATCOM inverters, simulation and experimental results prove the effectiveness of APF/STATCOM systems for harmonic mitigation based on the defined limit in IEEE-519.

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Design criteria of a control strategy for hybrid power filters based on current and voltage detection

Litrán

Salmerón

2013

Int. Trans. Electr. Energ. Syst.

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Summary A configuration consisting of a combination of a series active filter (APF) with a parallel passive filter has proven to be an efficient system for harmonic elimination of nonlinear loads. The most effective strategy for this configuration determines the APF reference voltage as the addition of two terms, the first proportional to the source current harmonics and the second opposite to the load voltage harmonics, current and voltage detection (CVD). To obtain the first term, an adequate adjustment of the proportionality constant ‘k’ is necessary for the implementation of the control algorithm. In this paper, design criteria to obtain the k values have been established, based on the system state model. Analysis of the resulting model provides the information needed to establish design criteria for the control strategy, both in terms of harmonic filtering and system stability. Finally, an experimental prototype was developed. The usefulness of the compensation equipment is experimentally confirmed in two contrasting situations: sinusoidal supply voltages and distorted supply voltages. Copyright © 2013 John Wiley & Sons, Ltd.

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Three-phase four-wire hybrid power filter using a smaller power converter

Cited by 23 publications

References 14 publications

Experimental Evaluation of a CPT-Based Four-Leg Active Power Compensator for Distributed Generation

Experimental Evaluation of a CPT-Based Four-Leg Active Power Compensator for Distributed Generation

Mitigation of Power Quality Issues Due to High Penetration of Renewable Energy Sources in Electric Grid Systems Using Three-Phase APF/STATCOM Technologies: A Review

Design criteria of a control strategy for hybrid power filters based on current and voltage detection

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