A New Universal Isolated Converter for Grid Connection

Kim, Myoungho; Yoo, Anno; Sul, Seung-Ki

doi:10.1109/tia.2011.2180496

Cited by 23 publications

(12 citation statements)

References 25 publications

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“…SEOUL converter is an AC-AC or AC-DC converter topology derived from the concept of SSTs [6]- [8]. It was developed to connect various distributed power sources to the grid with reduced amount of reactive component.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Controller Design for a SEries-Connected Output Universal Link Converter

Kim

Sul

Yoo

2015

IEEE Trans. on Ind. Applicat.

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This paper conducts modeling and controller design for SEries-connected Output Universal Link(SEOUL) converter. The SEOUL converter was proposed to interface multiple distributed power sources to the grid with reduced amount of reactive components. It employs high-frequency transformer instead of bulky line-frequency transformer like Solid State Transformers(SSTs). Besides, it does not use large DC-link capacitor at the input-side and reduces the size of the input filter. This is inherently possible due to its original operating characteristic. The input phase current is not actively controlled but synthesized indirectly by highfrequency power transfer between input and output-side of SEOUL converter. Therefore it is important to properly control the high-frequency power transfer part on which this paper focuses. An analytic model is developed and a control strategy is proposed based on the model with a decoupling control method. The developed model and proposed control method were verified by experiments. I.0093-9994 (c)

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Section: Introductionmentioning

confidence: 99%

“…The circuit configuration of the AC-AC SEOUL converter and basic operation principal had been introduced and discussed in [6]. However, detailed analysis for the power transfer based on the operating principal of its Hbridges was not presented.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Controller Design for a SEries-Connected Output Universal Link Converter

Kim

Sul

Yoo

2015

IEEE Trans. on Ind. Applicat.

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“…In the full bridge DC-AC-DC converter which allows energy transfer between the source and the load [1][2]. The performance of the converter will be analyzed by comparing various modulation strategies like phase shift, triangular and trapezoidal methods [3][4]. A high frequency transformer is used as isolation in DC-DC full bride converter.…”

Section: Introductionmentioning

confidence: 99%

Analysis Design and Implementation of Snubber Less CurrentFed Bidirectional Full Bridge Dc-Dc Converter

Kumar¹,

Suresh²

2014

IOSRJEEE

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“…SEOUL converter is an AC-AC or AC-DC converter topology derived from the concept of SST [5]- [7]. It was developed to connect various distributed power sources to the grid with reduced number of reactive component.…”

Section: Introductionmentioning

confidence: 99%

“…The circuit configuration of the AC-AC SEOUL converter and basic operation principal had been introduced and discussed in [5]. However, detailed analysis for the power transfer based on the switching of its H-bridges was not presented.…”

Section: Introductionmentioning

confidence: 99%

Modeling and controller design for series-connected output universal link converter

Kim

Sul

Yoo

2013

2013 IEEE Energy Conversion Congress and Exposition

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This paper conducts modeling and controller design for SEries-connected Output Universal Link(SEOUL) converter. The SEOUL converter was proposed to interface multiple distributed power sources to the grid with reduced number of reactive components. It employs high-frequency transformer instead of bulky line-frequency transformer as Solid State Transformers(SSTs). Besides, it does not use large DC-link capacitor at the input-side and reduce the size of the input filter. This is inherently possible due to its original operating characteristic. The H-bridges connected to the grid does not perform PWM operation to make the input phase current sinusoidal. Instead, their switches operate synchronized to the grid frequency and the input phase currents are synthesized sinusoidally by the high-frequency power transfer part of the SEOUL converter. This paper focuses on the power transfer of SEOUl converter and develops the analytic model of it. Based on the developed model, a DC-link voltage control strategy is proposed with the decoupling control method. The developed model and proposed control method was verified by experiments. The resultant input phase current is kept as sinusoidal at various operating conditions.

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A New Universal Isolated Converter for Grid Connection

Cited by 23 publications

References 25 publications

Modeling and Controller Design for a SEries-Connected Output Universal Link Converter

Modeling and Controller Design for a SEries-Connected Output Universal Link Converter

Analysis Design and Implementation of Snubber Less CurrentFed Bidirectional Full Bridge Dc-Dc Converter

Modeling and controller design for series-connected output universal link converter

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