Intelligent soft-starter-based grid-integrated induction generator for pitch-regulated wind turbine system

Nallavan, G.; Dhanasekaran, R.; Rajaji, L.

doi:10.1007/s00202-010-0162-6

Cited by 6 publications

(2 citation statements)

References 8 publications

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“…5, which presents grid currents and voltages for each method of grid connection. The generator speed is reasonable, because the grid connection of the induction generator is usually done with a generator speed close to the synchronous speed [3], [4], [6] and the generator has to operate at super-synchronous speed to deliver active power. As depicted in Fig.…”

Section: Simulation Resultsmentioning

confidence: 99%

Asynchronous Grid Connection of a Cage Induction Generator Excited by a Power Electronic Converter

Goarski

Iwański

2021

IEEE Trans. Energy Convers.

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This article presents an analysis of grid connection of an excited induction generator, where an inrush current is significantly reduced and voltage drop in the local grid is eliminated. In the proposed method, generator connection to the grid is done at the moment when the generator voltage vector equals the grid voltage vector, but the generator frequency differs from the grid frequency. Excitation of the induction generator is provided by a power electronic converter, which is rated only on the rated reactive power of the generator. Moreover, when the generator is connected to the grid, the converter satisfies reactive power demand of an induction generator, according to the requirements from the distribution system operator. The simulation and laboratory tests were conducted with a 7.5 kW induction generator.

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Section: Simulation Resultsmentioning

confidence: 99%

Asynchronous Grid Connection of a Cage Induction Generator Excited by a Power Electronic Converter

Goarski

Iwański

2021

IEEE Trans. Energy Convers.

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“…Further, transient current causes a significant voltage drop, which influences loads connected to the local grid (G orski et al, 2012;Yamada and Hanamoto, 2012). Grid connection using thyristor soft starter limits the inrush current but introduces higher harmonics into the grid (Nallavan et al, 2010;Mishra et al, 2013). An induction generator needs a significant amount of reactive power (Zobaa and Jovanovic, 2006) and required reactive power is taken from the grid (Elkholy, 2018;Makowski and Leicht, 2016;Sawetsakulanond and Kinnares, 2016;Zobaa and Jovanovic, 2006).…”

Section: Introductionmentioning

confidence: 99%

Analysis of squirrel-cage induction generator start-up supported by reactive power compensator

Górski

2019

COMPEL

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Purpose The power electronic converter is used for the satisfaction of reactive power demand of induction generator, when grid-tied. This paper aims to present an application of STATCOM to reduce inrush transient caused by the connection of a squirrel-cage induction generator (SCIG) to the grid. Design/methodology/approach The power generation system consists of an uncontrolled prime mover, a SCIG and a power electronic converter connected to the grid. The three-phase Neutral Point Clamped (NPC) converter works as a STATCOM to satisfy a reactive power demand of the generator. A control scheme of STATCOM uses the x-y reference frame rotating synchronously with grid voltage vector and the p-q instantaneous power theory to calculate q component of grid power. Findings It is shown that the parallel converter, which works as a reactive power compensator allows decreasing transients during a grid connection of the induction generator. Research limitations/implications Transients during a grid connection of the induction generator are only partially decreased. Practical implications It is needed to compensate for the reactive power of a SCIG. The NPC converter works as a STATCOM. The converter partially reduces grid transients during generator connection. The laboratory tests are demonstrated by connection 7.5 kW induction generator to 8 kVA transformer. Originality/value The paper presents the mitigation of grid transients during connection of induction generator with the power electronic converter working as reactive power compensator.

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Design, implementation, and verification of computer interactive parallel connection system with load-sharing control for synchronous generators

Güler

Irmak

2016

Electr Eng

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Intelligent soft-starter-based grid-integrated induction generator for pitch-regulated wind turbine system

Cited by 6 publications

References 8 publications

Asynchronous Grid Connection of a Cage Induction Generator Excited by a Power Electronic Converter

Asynchronous Grid Connection of a Cage Induction Generator Excited by a Power Electronic Converter

Analysis of squirrel-cage induction generator start-up supported by reactive power compensator

Design, implementation, and verification of computer interactive parallel connection system with load-sharing control for synchronous generators

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