Multiport Power Management Method with Partial Power Processing in a MV Solid-State Transformer for PV, Storage, and Fast-Charging EV Integration

Liran Zheng; Rajendra Prasad Kandula; Deepak Divan

doi:10.1109/ECCE44975.2020.9235735

Multiport Power Management Method with Partial Power Processing in a MV Solid-State Transformer for PV, Storage, and Fast-Charging EV Integration

Liran Zheng, Rajendra Prasad Kandula, Deepak Divan

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

11 Scopus citations

Abstract

This paper presents a control method to enable partial power processing (PPP) for increased efficiency of a multiport solid-state transformer (SST). Multiport SSTs are promising in integrating multiple LV DC/AC sources/loads such as photovoltaic (PV), storage, and electric vehicles (EV) into the grid without bulky line-frequency transformers. However, considering ~98.5% efficient line-frequency transformers, efficiency is one major challenge of the SST. For multiport MVLV SSTs, it is revealed in this paper that enabling direct energy exchange between two LV ports is more efficient than circulating power from one LV port into the transformer and back to another LV port. With the PPP, most power exchange between LV ports is processed by only part of the converter. This paper describes a modulation and control scheme for PPP of a current-source SST. The fundamental idea is to select appropriate space vectors that enable direct LV ports power exchange. With the proposed PPP control, the converter efficiency can increase by ~0.37%-1.28% in a wide-range of operating points in this paper. Simulation and experimental results verify the proposed PPP control scheme.

Original language	English
Title of host publication	ECCE 2020 - IEEE Energy Conversion Congress and Exposition
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	334-340
Number of pages	7
ISBN (Electronic)	9781728158266
DOIs	https://doi.org/10.1109/ECCE44975.2020.9235735
State	Published - Oct 11 2020
Externally published	Yes
Event	12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020 - Virtual, Detroit, United States Duration: Oct 11 2020 → Oct 15 2020

Publication series

Name	ECCE 2020 - IEEE Energy Conversion Congress and Exposition

Conference

Conference	12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020
Country/Territory	United States
City	Virtual, Detroit
Period	10/11/20 → 10/15/20

Funding

This work is supported by ARPA-E under DE-AR0000899 and Center for Distributed Energy, Georgia Tech. ACKNOWLEDGMENT The information, data, or work presented herein was funded in part by the Advanced Research Projects Agency-Energy (ARPA-E), U.S. Department of Energy, under Award Number DE-AR0000899 in the CIRCUITS program monitored by Dr. Isik Kizilyalli. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. This work is also funded in part by the Center for Distributed Energy (CDE), Georgia Tech. The authors are grateful for the help from Brandon Royal, Zachary Laird, Joshua Boudreau, Xiwei Zheng, and mechanical engineering assistants of the CDE in building the prototype.

Keywords

Three-port power electronic transformer (PET)
battery energy storage system (BESS)
current-source converter (CSC)
differential power processing (DPP)
extreme fast charging
isolated bidirectional converter
modular soft-switching solid-state transformer (M-S4T)
ultrafast charging

Access to Document

10.1109/ECCE44975.2020.9235735

Cite this

Zheng, L., Kandula, R. P., & Divan, D. (2020). Multiport Power Management Method with Partial Power Processing in a MV Solid-State Transformer for PV, Storage, and Fast-Charging EV Integration. In ECCE 2020 - IEEE Energy Conversion Congress and Exposition (pp. 334-340). Article 9235735 (ECCE 2020 - IEEE Energy Conversion Congress and Exposition). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE44975.2020.9235735

Zheng, Liran ; Kandula, Rajendra Prasad ; Divan, Deepak. / Multiport Power Management Method with Partial Power Processing in a MV Solid-State Transformer for PV, Storage, and Fast-Charging EV Integration. ECCE 2020 - IEEE Energy Conversion Congress and Exposition. Institute of Electrical and Electronics Engineers Inc., 2020. pp. 334-340 (ECCE 2020 - IEEE Energy Conversion Congress and Exposition).

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title = "Multiport Power Management Method with Partial Power Processing in a MV Solid-State Transformer for PV, Storage, and Fast-Charging EV Integration",

abstract = "This paper presents a control method to enable partial power processing (PPP) for increased efficiency of a multiport solid-state transformer (SST). Multiport SSTs are promising in integrating multiple LV DC/AC sources/loads such as photovoltaic (PV), storage, and electric vehicles (EV) into the grid without bulky line-frequency transformers. However, considering ~98.5% efficient line-frequency transformers, efficiency is one major challenge of the SST. For multiport MVLV SSTs, it is revealed in this paper that enabling direct energy exchange between two LV ports is more efficient than circulating power from one LV port into the transformer and back to another LV port. With the PPP, most power exchange between LV ports is processed by only part of the converter. This paper describes a modulation and control scheme for PPP of a current-source SST. The fundamental idea is to select appropriate space vectors that enable direct LV ports power exchange. With the proposed PPP control, the converter efficiency can increase by ~0.37%-1.28% in a wide-range of operating points in this paper. Simulation and experimental results verify the proposed PPP control scheme.",

keywords = "Three-port power electronic transformer (PET), battery energy storage system (BESS), current-source converter (CSC), differential power processing (DPP), extreme fast charging, isolated bidirectional converter, modular soft-switching solid-state transformer (M-S4T), ultrafast charging",

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

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Zheng, L, Kandula, RP & Divan, D 2020, Multiport Power Management Method with Partial Power Processing in a MV Solid-State Transformer for PV, Storage, and Fast-Charging EV Integration. in ECCE 2020 - IEEE Energy Conversion Congress and Exposition., 9235735, ECCE 2020 - IEEE Energy Conversion Congress and Exposition, Institute of Electrical and Electronics Engineers Inc., pp. 334-340, 12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020, Virtual, Detroit, United States, 10/11/20. https://doi.org/10.1109/ECCE44975.2020.9235735

Multiport Power Management Method with Partial Power Processing in a MV Solid-State Transformer for PV, Storage, and Fast-Charging EV Integration. / Zheng, Liran; Kandula, Rajendra Prasad; Divan, Deepak.
ECCE 2020 - IEEE Energy Conversion Congress and Exposition. Institute of Electrical and Electronics Engineers Inc., 2020. p. 334-340 9235735 (ECCE 2020 - IEEE Energy Conversion Congress and Exposition).

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

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AB - This paper presents a control method to enable partial power processing (PPP) for increased efficiency of a multiport solid-state transformer (SST). Multiport SSTs are promising in integrating multiple LV DC/AC sources/loads such as photovoltaic (PV), storage, and electric vehicles (EV) into the grid without bulky line-frequency transformers. However, considering ~98.5% efficient line-frequency transformers, efficiency is one major challenge of the SST. For multiport MVLV SSTs, it is revealed in this paper that enabling direct energy exchange between two LV ports is more efficient than circulating power from one LV port into the transformer and back to another LV port. With the PPP, most power exchange between LV ports is processed by only part of the converter. This paper describes a modulation and control scheme for PPP of a current-source SST. The fundamental idea is to select appropriate space vectors that enable direct LV ports power exchange. With the proposed PPP control, the converter efficiency can increase by ~0.37%-1.28% in a wide-range of operating points in this paper. Simulation and experimental results verify the proposed PPP control scheme.

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Zheng L, Kandula RP, Divan D. Multiport Power Management Method with Partial Power Processing in a MV Solid-State Transformer for PV, Storage, and Fast-Charging EV Integration. In ECCE 2020 - IEEE Energy Conversion Congress and Exposition. Institute of Electrical and Electronics Engineers Inc. 2020. p. 334-340. 9235735. (ECCE 2020 - IEEE Energy Conversion Congress and Exposition). doi: 10.1109/ECCE44975.2020.9235735

Multiport Power Management Method with Partial Power Processing in a MV Solid-State Transformer for PV, Storage, and Fast-Charging EV Integration

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