Impact of Transformer Leakage Inductance on the Soft-Switching Solid-State Transformer

Liran Zheng; Karthik Kandasamy; Rajendra Prasad Kandula; Deepak Divan

doi:10.1109/ECCE.2018.8557980

Impact of Transformer Leakage Inductance on the Soft-Switching Solid-State Transformer

Liran Zheng, Karthik Kandasamy, Rajendra Prasad Kandula, Deepak Divan

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

18 Scopus citations

Abstract

Leakage inductance is inevitable in high frequency (HF) transformer design for solid-state transformer applications. Managing the energy trapped in leakage is very crucial for a safe and efficient operation of Solid-State Transformer (SST) converters. In the soft-switching solid-state transformer (S4T), leakage energy management is achieved in a passive way by having it absorbed in the two auxiliary resonant circuits, one on each side of the HF transformer. However, this could lead to an additional voltage/current stress on the resonant circuit and could impact various elements of the S4T design. This paper presents a detailed analysis of the resonant circuit operation and analytically derived relations between the leakage inductance and the peak voltage/current stress in the S4T converter. Simulation and experimental results verifying the analysis are presented. Using the derived relations, the design considerations for the S4T resonant circuit parameters are also discussed.

Original language	English
Title of host publication	2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1125-1132
Number of pages	8
ISBN (Electronic)	9781479973118
DOIs	https://doi.org/10.1109/ECCE.2018.8557980
State	Published - Dec 3 2018
Externally published	Yes
Event	10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 - Portland, United States Duration: Sep 23 2018 → Sep 27 2018

Publication series

Name	2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018

Conference

Conference	10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018
Country/Territory	United States
City	Portland
Period	09/23/18 → 09/27/18

Funding

This work has been supported by the Center for Distributed Energy (CDE) at Georgia Tech. The authors are grateful for the help of Brandon Royal and Xiwei Zheng in building the transformers.

Funders	Funder number
Center for Distributed Energy

Keywords

Current-source converter
High-frequency link
High-frequency transformer
Leakage energy
Leakage inductance
Soft switching
Solid-state transformer

Access to Document

10.1109/ECCE.2018.8557980

Cite this

Zheng, L., Kandasamy, K., Kandula, R. P., & Divan, D. (2018). Impact of Transformer Leakage Inductance on the Soft-Switching Solid-State Transformer. In 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018 (pp. 1125-1132). Article 8557980 (2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2018.8557980

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title = "Impact of Transformer Leakage Inductance on the Soft-Switching Solid-State Transformer",

abstract = "Leakage inductance is inevitable in high frequency (HF) transformer design for solid-state transformer applications. Managing the energy trapped in leakage is very crucial for a safe and efficient operation of Solid-State Transformer (SST) converters. In the soft-switching solid-state transformer (S4T), leakage energy management is achieved in a passive way by having it absorbed in the two auxiliary resonant circuits, one on each side of the HF transformer. However, this could lead to an additional voltage/current stress on the resonant circuit and could impact various elements of the S4T design. This paper presents a detailed analysis of the resonant circuit operation and analytically derived relations between the leakage inductance and the peak voltage/current stress in the S4T converter. Simulation and experimental results verifying the analysis are presented. Using the derived relations, the design considerations for the S4T resonant circuit parameters are also discussed.",

keywords = "Current-source converter, High-frequency link, High-frequency transformer, Leakage energy, Leakage inductance, Soft switching, Solid-state transformer",

author = "Liran Zheng and Karthik Kandasamy and Kandula, {Rajendra Prasad} and Deepak Divan",

note = "Publisher Copyright: {\textcopyright} 2018 IEEE.; 10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 ; Conference date: 23-09-2018 Through 27-09-2018",

year = "2018",

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doi = "10.1109/ECCE.2018.8557980",

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Zheng, L, Kandasamy, K, Kandula, RP & Divan, D 2018, Impact of Transformer Leakage Inductance on the Soft-Switching Solid-State Transformer. in 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018., 8557980, 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018, Institute of Electrical and Electronics Engineers Inc., pp. 1125-1132, 10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018, Portland, United States, 09/23/18. https://doi.org/10.1109/ECCE.2018.8557980

Impact of Transformer Leakage Inductance on the Soft-Switching Solid-State Transformer. / Zheng, Liran; Kandasamy, Karthik; Kandula, Rajendra Prasad et al.
2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018. Institute of Electrical and Electronics Engineers Inc., 2018. p. 1125-1132 8557980 (2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Kandasamy, Karthik

AU - Kandula, Rajendra Prasad

AU - Divan, Deepak

PY - 2018/12/3

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N2 - Leakage inductance is inevitable in high frequency (HF) transformer design for solid-state transformer applications. Managing the energy trapped in leakage is very crucial for a safe and efficient operation of Solid-State Transformer (SST) converters. In the soft-switching solid-state transformer (S4T), leakage energy management is achieved in a passive way by having it absorbed in the two auxiliary resonant circuits, one on each side of the HF transformer. However, this could lead to an additional voltage/current stress on the resonant circuit and could impact various elements of the S4T design. This paper presents a detailed analysis of the resonant circuit operation and analytically derived relations between the leakage inductance and the peak voltage/current stress in the S4T converter. Simulation and experimental results verifying the analysis are presented. Using the derived relations, the design considerations for the S4T resonant circuit parameters are also discussed.

AB - Leakage inductance is inevitable in high frequency (HF) transformer design for solid-state transformer applications. Managing the energy trapped in leakage is very crucial for a safe and efficient operation of Solid-State Transformer (SST) converters. In the soft-switching solid-state transformer (S4T), leakage energy management is achieved in a passive way by having it absorbed in the two auxiliary resonant circuits, one on each side of the HF transformer. However, this could lead to an additional voltage/current stress on the resonant circuit and could impact various elements of the S4T design. This paper presents a detailed analysis of the resonant circuit operation and analytically derived relations between the leakage inductance and the peak voltage/current stress in the S4T converter. Simulation and experimental results verifying the analysis are presented. Using the derived relations, the design considerations for the S4T resonant circuit parameters are also discussed.

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KW - High-frequency link

KW - High-frequency transformer

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Y2 - 23 September 2018 through 27 September 2018

ER -

Zheng L, Kandasamy K, Kandula RP, Divan D. Impact of Transformer Leakage Inductance on the Soft-Switching Solid-State Transformer. In 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018. Institute of Electrical and Electronics Engineers Inc. 2018. p. 1125-1132. 8557980. (2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018). doi: 10.1109/ECCE.2018.8557980

Impact of Transformer Leakage Inductance on the Soft-Switching Solid-State Transformer

Abstract

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Keywords

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