Evaluation of repetitive control for power quality improvement of distributed generation

Liang, Jun; Green, T.C.; Zhong, Qing-Chang

doi:10.1109/psec.2002.1023072

Cited by 28 publications

(15 citation statements)

References 6 publications

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“…The output-voltage amplitude is regulated by using the conventional droop method with the inclusion of the reactive power derivative term [see (6)]. …”

Section: Controller Implementationmentioning

confidence: 99%

“…Most part of these resources need power electronic interfaces to make up local ac grids [4], [5]. This way, inverters or ac-to-ac converters are connected to an ac common bus with the aim to share properly the disperse loads connected to the local grid [6]. In addition, every unit must be able to operate independently when communication is too difficult due to the long distance between its connection points [7].…”

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confidence: 99%

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A Wireless Controller to Enhance Dynamic Performance of Parallel Inverters in Distributed Generation Systems

Guerrero

Vicuña

Matas

et al. 2004

IEEE Trans. Power Electron.

915

451

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Abstract-This paper presents a novel control strategy for parallel inverters of distributed generation units in an ac distribution system. The proposed control technique, based on the droop control method, uses only locally measurable feedback signals. This method is usually applied to achieve good active and reactive power sharing when communication between the inverters is difficult due to its physical location. However, the conventional voltage and frequency droop methods of achieving load sharing have a slow and oscillating transient response. Moreover, there is no possibility to modify the transient response without the loss of power sharing precision or output-voltage and frequency accuracy. In this work, a great improvement in transient response is achieved by introducing power derivative-integral terms into a conventional droop scheme. Hence, better controllability of the system is obtained and, consequently, proper transient performance can be achieved. In addition, an instantaneous current control loop is also included in the novel controller to ensure proper sharing of harmonic components when supplying nonlinear loads. Simulation and experimental results are presented to prove the validity of this approach, which shows excellent performance as opposed to the conventional one.

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“…The output-voltage amplitude is regulated by using the conventional droop method with the inclusion of the reactive power derivative term [see (6)]. …”

Section: Controller Implementationmentioning

confidence: 99%

mentioning

confidence: 99%

A Wireless Controller to Enhance Dynamic Performance of Parallel Inverters in Distributed Generation Systems

Guerrero

Vicuña

Matas

et al. 2004

IEEE Trans. Power Electron.

915

451

View full text Add to dashboard Cite

show abstract

“…If control of the voltage magnitude at the point of common coupling is allowed (or if a local bus separated from the utility grid is arranged for supply of premium loads) then control of the whole of the voltage spectrum (up to the control bandwidth limit) is possible. One such scheme has been reported [9] using a technique known as repetitive control to suppress distortion.…”

Section: Grid-connected Modementioning

confidence: 99%

Control of inverter-based micro-grids

Green

Prodanović

2007

Electric Power Systems Research

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295

195

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“…The converter is the one which will be used in the experimental verification rated at 30 kW and is designed to work in a four-wire system with a nominal phase voltage of 240 V RMS . Further discussion of this application can be found in [18], [21], and [22]. The parameters of the neutral-leg circuit are: L N = 2.5 mH, R N = 0.2 Ω, C N + = C N − = 6600 µF, and V dc = 800 V. The switching frequency is f s = 10 kHz and F (s) = 1000/(s + 1000).…”

Section: Design Examplementioning

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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Evaluation of repetitive control for power quality improvement of distributed generation

Cited by 28 publications

References 6 publications

A Wireless Controller to Enhance Dynamic Performance of Parallel Inverters in Distributed Generation Systems

A Wireless Controller to Enhance Dynamic Performance of Parallel Inverters in Distributed Generation Systems

Control of inverter-based micro-grids

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

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