Laboratory Demonstration of Closed-Loop 30 kW, 200 V/900 V IGBT-Based LCL DC/DC Converter

Seyed Mahdi Fazeli; Dragan Jovcic; Masood Hajian Foroushani

doi:10.1109/TPWRD.2017.2756987

Laboratory Demonstration of Closed-Loop 30 kW, 200 V/900 V IGBT-Based LCL DC/DC Converter

Seyed Mahdi Fazeli, Dragan Jovcic, Masood Hajian Foroushani

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

12 Downloads (Pure)

Abstract

The inductor-capacitor-inductor (LCL) DC/DC converter has been extensively studied for high power and stepping ratio because of elimination of internal transformer, lower footprint/weight, higher efficiency, and most importantly
providing DC fault isolation from both DC sides. This paper presents a two-channel, two-layer controller including two inner current loops, which is symmetrical for each bridge of LCL DC/DC. The real-time implementation of control scheme and its performance in normal conditions and during transient DC faults at both sides are studied on a 30kW 200V/900V 1.7 kHz prototype. The prototype development is presented in some depth. The experimental results show that the converter with closed loop control operates well at full power and under fast power reversal. Further DC fault testing concludes that there is no need for blocking since the internal voltage and current variables are within the rated values. Detailed study of converter losses is performed and results show that full power efficiency is around 93.4%.

Original language	English
Pages (from-to)	1247-1256
Number of pages	10
Journal	IEEE Transactions on Power Delivery
Volume	33
Issue number	3
Early online date	11 Oct 2017
DOIs	https://doi.org/10.1109/TPWRD.2017.2756987
Publication status	Published - Jun 2018

Bibliographical note

This work was supported by EPSRC UK grant no. EP/K006428/1.

ACKNOWLEDGEMENT
The authors would like to acknowledge significant input from Aberdeen University HVDC lab technicians: A. Styles and R. Osborne, in building this converter.

Keywords

DC/DC converter
HVDC transmission
insulated-gate bipolar transistor (IGBT)
DC fault isolation

Access to Document

10.1109/TPWRD.2017.2756987Licence: Unspecified

Accepted Manuscript
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Accepted author manuscript, 1.78 MBLicence: Unspecified

Dragan Jovcic
- Engineering, Aberdeen HVDC Research Centre
- Centre for Energy Transition
- Engineering, Engineering - Chair in Engineering
Person: Academic

Development of DC transmission grids using DC-DC converters
Dragan Jovcic (Coordinator)
Impact: Other Impacts

Cite this

@article{bab173a2ae6640c38c295330138200ad,

title = "Laboratory Demonstration of Closed-Loop 30 kW, 200 V/900 V IGBT-Based LCL DC/DC Converter",

abstract = "The inductor-capacitor-inductor (LCL) DC/DC converter has been extensively studied for high power and stepping ratio because of elimination of internal transformer, lower footprint/weight, higher efficiency, and most importantlyproviding DC fault isolation from both DC sides. This paper presents a two-channel, two-layer controller including two inner current loops, which is symmetrical for each bridge of LCL DC/DC. The real-time implementation of control scheme and its performance in normal conditions and during transient DC faults at both sides are studied on a 30kW 200V/900V 1.7 kHz prototype. The prototype development is presented in some depth. The experimental results show that the converter with closed loop control operates well at full power and under fast power reversal. Further DC fault testing concludes that there is no need for blocking since the internal voltage and current variables are within the rated values. Detailed study of converter losses is performed and results show that full power efficiency is around 93.4%.",

keywords = "DC/DC converter, HVDC transmission, insulated-gate bipolar transistor (IGBT), DC fault isolation",

author = "Fazeli, {Seyed Mahdi} and Dragan Jovcic and {Hajian Foroushani}, Masood",

note = "This work was supported by EPSRC UK grant no. EP/K006428/1. ACKNOWLEDGEMENT The authors would like to acknowledge significant input from Aberdeen University HVDC lab technicians: A. Styles and R. Osborne, in building this converter. ",

year = "2018",

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language = "English",

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AU - Fazeli, Seyed Mahdi

AU - Jovcic, Dragan

AU - Hajian Foroushani, Masood

N1 - This work was supported by EPSRC UK grant no. EP/K006428/1. ACKNOWLEDGEMENT The authors would like to acknowledge significant input from Aberdeen University HVDC lab technicians: A. Styles and R. Osborne, in building this converter.

PY - 2018/6

Y1 - 2018/6

N2 - The inductor-capacitor-inductor (LCL) DC/DC converter has been extensively studied for high power and stepping ratio because of elimination of internal transformer, lower footprint/weight, higher efficiency, and most importantlyproviding DC fault isolation from both DC sides. This paper presents a two-channel, two-layer controller including two inner current loops, which is symmetrical for each bridge of LCL DC/DC. The real-time implementation of control scheme and its performance in normal conditions and during transient DC faults at both sides are studied on a 30kW 200V/900V 1.7 kHz prototype. The prototype development is presented in some depth. The experimental results show that the converter with closed loop control operates well at full power and under fast power reversal. Further DC fault testing concludes that there is no need for blocking since the internal voltage and current variables are within the rated values. Detailed study of converter losses is performed and results show that full power efficiency is around 93.4%.

AB - The inductor-capacitor-inductor (LCL) DC/DC converter has been extensively studied for high power and stepping ratio because of elimination of internal transformer, lower footprint/weight, higher efficiency, and most importantlyproviding DC fault isolation from both DC sides. This paper presents a two-channel, two-layer controller including two inner current loops, which is symmetrical for each bridge of LCL DC/DC. The real-time implementation of control scheme and its performance in normal conditions and during transient DC faults at both sides are studied on a 30kW 200V/900V 1.7 kHz prototype. The prototype development is presented in some depth. The experimental results show that the converter with closed loop control operates well at full power and under fast power reversal. Further DC fault testing concludes that there is no need for blocking since the internal voltage and current variables are within the rated values. Detailed study of converter losses is performed and results show that full power efficiency is around 93.4%.

KW - DC/DC converter

KW - HVDC transmission

KW - insulated-gate bipolar transistor (IGBT)

KW - DC fault isolation

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DO - 10.1109/TPWRD.2017.2756987

M3 - Article

SN - 0885-8977

VL - 33

SP - 1247

EP - 1256

JO - IEEE Transactions on Power Delivery

JF - IEEE Transactions on Power Delivery

IS - 3

ER -

Laboratory Demonstration of Closed-Loop 30 kW, 200 V/900 V IGBT-Based LCL DC/DC Converter

Abstract

Bibliographical note

Keywords

Access to Document

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Profiles

Dragan Jovcic

Impacts

Development of DC transmission grids using DC-DC converters

Cite this