A Dynamic Voltage Restorer (DVR) With Selective Harmonic Compensation at Medium Voltage Level

Newman, Michael; Holmes, D.G.; Nielsen, J.G.; Blaabjerg, Frede

doi:10.1109/tia.2005.858212

Cited by 208 publications

(65 citation statements)

References 7 publications

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“…Many researchers have carried their work on how to identify the power system voltage disturbances like voltage sag and swell. According to IEEE standards of power system operation, a sag is defined as reduce in voltage value from 90% to 10% of its final value and voltage swell is defined as raise in voltage value greater than 110% of its final value [4][5][6].There are several Techniques are followed to find out the harmonics level in power systems, but this work utilizes FFT analysis not only for its quick response but also for its simple implementation and its reduced complexity. The schematic arrangement of power system network for voltage sag and voltage swell identification is illustrated in Fig 1.Custom power devices might be a solution to eliminate or reduce power quality problems.…”

Section: Introductionmentioning

confidence: 99%

Voltage Sag and Swell Identification Using FFT Analysis and Mitigation with DVR

Devadasu¹

2017

IOSR JEEE

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Section: Introductionmentioning

confidence: 99%

Voltage Sag and Swell Identification Using FFT Analysis and Mitigation with DVR

Devadasu¹

2017

IOSR JEEE

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“…The attractiveness of the nineswitch converter, if indeed any, is therefore not yet fully brought out by those existing applications discussed in [13]- [15]. Although follow-up topological extensions can subsequently be found in [16], where a Z-source network and alternative modulation schemes are introduced, they did not fully address those critical limitations faced by the nine-switch converter, and not its traditional back-to-back counterpart. Investigating further by taking a closer view at those existing applications described earlier, a general note observed is that they commonly use the nine-switch converter to replace two shunt converters connected backto-back.…”

Section: Introductionmentioning

confidence: 99%

Performance and analysis for improvement of power quality and voltage sag mitigation

Prasad¹,

Kumar²,

Reddy³

et al. 2015

International Journal of Innovative Research in Electrical, Ele

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Aiming further to reduce its switching losses, an appropriate discontinuous modulation scheme is proposed and studied here in detail to doubly ensure that maxi-mal reduction of commutations is achieved. With an appropriately designed control scheme had incorporated with nine-switch converter is shown to favorably raise the overall power quality and voltage mitigation hence justifying its role as a power conditioner at a reduced semiconductor cost. A nineswitch power converter having two sets of out-put terminals was recently proposed in addition of the traditional backto-back power converter that uses 12 switches in total. The nine-switch converter had already been proven to have certain advantages, in addition to its component saving topological features. Despite these advantages, the nine-switch converter has so requiring an oversized dc-link capacitor, limited amplitude sharing, and constrained phase shift between its two sets of output terminals. Instead of accepting these tradeoffs as limitations, a nine-switch power conditioner is proposed here that virtually -converts‖ most of these topological shortfalls are overcome into interesting performance advantages.

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“…DVRs are divided into two types with reference to the connection pattern. A DVR connected in series with a load through a transformer is the most common structure [4]. One severe disadvantage of this configuration is its high system losses due to continuous operation.…”

Section: Introductionmentioning

confidence: 99%

Three-Phase Line-Interactive Dynamic Voltage Restorer with a New Sag Detection Algorithm

Jeong¹,

Lee²,

Han³

2010

Journal of Power Electronics

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This paper describes the development of a three-phase line-interactive DVR with a new sag detection algorithm. The developed detection algorithm has a hybrid structure composed of an instantaneous detector and RMS-variation detectors. The source voltage passes through the sliding-window DFT and RMS calculator, and the instantaneous sag detector. If an instantaneous sag is detected, the RMS variation detector-1 is selected to calculate the RMS variation. The RMS variation detector-2 is selected when the instantaneous sag occurs under the operation of the RMS variation detector-1. The feasibility of the proposed algorithm is verified through computer simulations and experimental work with a prototype of a line-interactive DVR with a 3kVA rating. The line-interactive DVR with the proposed algorithm can compensate for an input voltage sag or an interruption within a 2ms delay. The developed DVR can effectively compensate for a voltage sag or interruption in sensitive loads, such as computers, communications equipment, and automation equipment.

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A Dynamic Voltage Restorer (DVR) With Selective Harmonic Compensation at Medium Voltage Level

Cited by 208 publications

References 7 publications

Voltage Sag and Swell Identification Using FFT Analysis and Mitigation with DVR

Voltage Sag and Swell Identification Using FFT Analysis and Mitigation with DVR

Performance and analysis for improvement of power quality and voltage sag mitigation

Three-Phase Line-Interactive Dynamic Voltage Restorer with a New Sag Detection Algorithm

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