A line-interactive UPS system implementation with series-parallel active power-line conditioning for three-phase, four-wire systems

Silva, Sérgio Augusto Oliveira da; Donoso-Garcia, P.F.; Cortizo, P.C.; Seixas, P.F.

doi:10.1590/s0103-17592005000200008

Cited by 4 publications

(3 citation statements)

References 2 publications

(1 reference statement)

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“…1 Three-phase four-wire SAPF with 3F-B inverters references [1,3,29,32]. In [29], for instance, SRF-based controller was employed in a hybrid APF solution for improving passive filter performance in high power applications, whereas in [31,32] the SRF-based controller was used to generate the sinusoidal compensating current references applied to a three-phase line-interactive UPS system. In this work, for this purpose, an algorithm based on SRF is also used.…”

Section: Srf-based Controllersmentioning

confidence: 99%

“…On the other hand, compensation algorithms based on pq-theory can affect the performance of APFs when utility voltage disturbances, such as harmonics and unbalances occur [1,19]. Thereby, as an alternative to minimise or overcome the problems related to some voltage disturbances in APFs, synchronous reference frame (SRF)-based controllers have been employed [29,31,32].…”

Section: Introductionmentioning

confidence: 99%

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Application of shunt active power filter for harmonic reduction and reactive power compensation in three‐phase four‐wire systems

Campanhol

Silva

Goedtel

2014

IET Power Electronics

125

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This study deals with the analysis and implementation of compensation algorithms applied to a shunt active power filter, which uses three single-phase full-bridge converters sharing the same dc-bus voltage. The shunt filter is applied to three-phase four-wire systems, performing harmonic current suppression, reactive power compensation and power factor improvement. In addition, load unbalances compensation is also carried out. Two different control strategies are presented. In the first strategy, which is called independent current control, the currents of the three-phase power source are independently compensated performing harmonic suppression and load reactive power compensation, that is, the three-phase four-wire system is treated as three independent single-phase systems. In the second strategy, in addition to harmonic suppression and load reactive power compensation, the shunt filter also performs load unbalance compensation, resulting in sinusoidal and balanced source currents. The compensating algorithms are evaluated by means of several experimental test conditions, in order to validate the theoretical development and analyse the performance of the shunt filter.

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Section: Srf-based Controllersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of shunt active power filter for harmonic reduction and reactive power compensation in three‐phase four‐wire systems

Campanhol

Silva

Goedtel

2014

IET Power Electronics

125

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“…UPS systems have been employed in several applications where uninterrupted power to critical loads is needed, such as medical equipment, computers and others. In addition to provide protection against power supply disturbances and to offer clean and uninterruptible power to critical loads, UPS systems can also be used for power-line conditioning in three-phase systems, which help to improve the power quality in electrical systems [26][27][28][29]. Under normal or abnormal incoming power conditions, the line-interactive UPS system must be able to drain balanced and sinusoidal currents from the utility.…”

Section: Iet Power Electronicsmentioning

confidence: 99%

Power quality improvement using a dual unified power quality conditioner/uninterruptible power supply in three‐phase four‐wire systems

Modesto

Silva

Júnior

2015

IET Power Electronics

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Using a dual compensation strategy, this study proposes the analysis and implementation of active power quality conditioners (PQCs), which are applied for power quality improvement in three-phase four-wire (3P4W) systems. By means of similar control strategy use, the topology employed to implement the PQCs can operate as unified PQC (UPQC), or, through some circuit modifications, as uninterruptible power supply (UPS) system. Considering 3P4W systems, the use of the dual compensation strategy into the PQCs comprised of two four-leg (4-Leg) converters is the main contribution of this study. Different from the conventional strategies, in the dual compensation strategy, the 4-Leg converter connected in parallel with the load is controlled to operate as a sinusoidal voltage source, whereas the 4-Leg converter connected in series between the grid and the load is controlled to operate as a sinusoidal current source. Both the voltage and current controllers are implemented into the synchronous rotating reference frame, and the converters use the three-dimensional space vector modulation technique. Experimental tests, based on a digital signal processor, are performed in order to validate the theoretical development and to verify both static and dynamic performance of the PQC operating as UPQC, as well as UPS system.

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Decoupled Reference Generator for Shunt Active Filters Using the Conservative Power Theory

Marafão

Brandão

Gonçalves

et al. 2013

J Control Autom Electr Syst

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A line-interactive UPS system implementation with series-parallel active power-line conditioning for three-phase, four-wire systems

Abstract: Keywords: Active Filter; UPS; Harmonics.

Cited by 4 publications

References 2 publications

Application of shunt active power filter for harmonic reduction and reactive power compensation in three‐phase four‐wire systems

Application of shunt active power filter for harmonic reduction and reactive power compensation in three‐phase four‐wire systems

Power quality improvement using a dual unified power quality conditioner/uninterruptible power supply in three‐phase four‐wire systems

Decoupled Reference Generator for Shunt Active Filters Using the Conservative Power Theory

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