Active filtering of harmonic currents in three-phase, four-wire systems with three-phase and single-phase nonlinear loads

Quinn, Conor; Mohan, Ned

doi:10.1109/apec.1992.228328

Cited by 159 publications

(84 citation statements)

References 5 publications

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“…2. This kind of structure uses 8 insulated-gate bipolar transistor (IGBT) allowing full compensation of current flowing through the neutral conductor without presenting problems of dynamic response as has been reported in the inverter-Split Capacitor, besides of the fact that it can work with a 15% smaller value of the DC-link voltage [16]. Thus, this topology is better suited for applications where it is desired to compensate the zero-sequence current, although it requires a larger number of IGBT [17].…”

Section: A Four-legs Sapfmentioning

confidence: 99%

Application of fuzzy systems in the control of a shunt active power filter with four-leg topology

Acordi¹,

Silva

Machado

2014

2014 International Joint Conference on Neural Networks (IJCNN)

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Abstract-This paper presents the application of fuzzy controllers to act in the current control loop of a shunt active power filter (SAPF). The SAPF consists of a three-phase inverter with four-leg topology, and it has been used to reduce the harmonic content produced by nonlinear loads, as well as, in the reactive power compensation. The generation of the reference currents is based on the synchronous reference frame (SRF), which requires the use of a PLL (Phase Locked Loop) synchronization algorithm with the grid. The classic PI control is here replaced by a fuzzy controller that has features that allows fast convergence and robustness when there are parametric variations in the physical system. Results obtained from simulations are presented to validate the approach and to demonstrate the performance of the filter in the suppression of harmonic currents and reactive power.

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Section: A Four-legs Sapfmentioning

confidence: 99%

Application of fuzzy systems in the control of a shunt active power filter with four-leg topology

Acordi¹,

Silva

Machado

2014

2014 International Joint Conference on Neural Networks (IJCNN)

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“…If the non-linear loads are unbalanced, the input currents will be unbalanced in terms of fundamental and harmonic components, and a very large third component and its multiples will flow in the neutral wire. The excessive neutral currents can cause damage both in the neutral conductor and in the transformer to which it is connected (Quinn et al, 1992). Thereby, active filter topologies have been used to compensate neutral harmonic currents (Quinn et al, 1992;Quinn et al, 1993;Thomas el al., 1996).…”

Section: Introductionmentioning

confidence: 99%

“…The excessive neutral currents can cause damage both in the neutral conductor and in the transformer to which it is connected (Quinn et al, 1992). Thereby, active filter topologies have been used to compensate neutral harmonic currents (Quinn et al, 1992;Quinn et al, 1993;Thomas el al., 1996). Uninterruptible power supply (UPS) systems have enabled the improvement of power source quality, providing clean and uninterruptible power to critical loads such as industrial process controls, computers, medical equipment, data communication systems, and protection against power supply disturbances or interruptions (Oliveira da Silva et al, 2001;Kamran et al, 1995;Jeon et al, 1997, Cheung et al, 1996Lin et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

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

Silva

Donoso-Garcia

Cortizo

et al. 2004

International Journal of Electrical Power & Energy Systems

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“…It is considered that this topology is not suitable for dc-ac converters which supply power to a network containing single-phase loads. A split dc-link of this form is used in four-wire active power filters, where rebalancing of the imbalance is not attempted and the system is free of dc components [11]- [12]. Some special pulsewidth modulation (PWM) schemes have been developed for three-level converters to balance the charging of the split link capacitors [3]- [14], but these apply to multilevel converters which do not make external connection to the neutral point (i.e., three-wire systems).…”

mentioning

confidence: 99%

$H^infty$Control of the Neutral Point in Four-Wire Three-Phase DC–AC Converters

Zhong

Liang

Feng

et al. 2006

IEEE Trans. Ind. Electron.

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Abstract-Inverters used as the interface for a distributed generator in a three-phase four-wire system sometimes operate with a large neutral current because of unbalanced loads and singlephase (possibly nonlinear) loads. Voltage balance within the dc-link of the inverter is important for proper operation of the inverter, and the neutral current is a significant disturbance to this. It is preferable to use fast acting control rather than dissipative balancing or large-valued capacitors. This paper develops a linear model of an actively balanced split dc-link and applies H ∞ control design to provide high-bandwidth robust control. The approach is developed for a conventional two-level inverter, but it remains valid (without change) for a three-level neutral-point clamped inverter. The controller achieves very small deviations of the neutral point (better than 0.5 in 800 V) from the midpoint of the dc source despite the large neutral current (32 A RMS ). The controller design is described and verified first in a PSCAD simulation and second in experimental testing of a 30-kW 415-V (line) inverter.Index Terms-DC-AC power converter, dc-link balancing, fourwire three-phase power system, H ∞ control, multilevel inverter, neutral line.

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Active filtering of harmonic currents in three-phase, four-wire systems with three-phase and single-phase nonlinear loads

Cited by 159 publications

References 5 publications

Application of fuzzy systems in the control of a shunt active power filter with four-leg topology

Application of fuzzy systems in the control of a shunt active power filter with four-leg topology

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

$H^infty$Control of the Neutral Point in Four-Wire Three-Phase DC–AC Converters

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