Design a nine-level modular multilevel converter for DC railway electrification system

Chuen Ling Toh, Pei Cheng Ooi

Research output: Contribution to journalArticle

Abstract

A recuperating converter is highly demanded in traction power substation to deliver the braking energy generated by a traction vehicle. Conventional voltage source inverter had been implemented in the traction power station. However, large AC line filters must be installed to improve the quality of AC voltages and currents. This paper proposes to install a nine-level Modular Multilevel Converter (MMC) as a recuperating converter. The main aim is to eliminate the need of AC line filters while producing good quality of AC voltage and current waveforms. The MMC is designed and modelled using MATLAB/Simulink Simulation tool. A centralized control of balancing all the sub-module capacitor voltage level is proposed with Third Harmonic Voltage Injection Level Shifted Pulse Width Modulation (THVI-LSPWM) technique. The simulation results prove that with the application of MMC, good quality of ac voltages and currents are being produced. The Total Harmonic Distortion indexes are found less than 3.5 % without using any AC line filters in the system. In addition, the classic DC link capacitance has also being eliminated.

Original languageEnglish
Pages (from-to)151-159
Number of pages9
JournalInternational Journal of Power Electronics and Drive Systems
Volume11
Issue number1
DOIs
Publication statusPublished - Mar 2020

Fingerprint

Electric potential
Traction (friction)
Harmonic distortion
Braking
Pulse width modulation
MATLAB
Capacitors
Capacitance

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

@article{085844f46fb241269c1fdcd91eb3ff4d,
title = "Design a nine-level modular multilevel converter for DC railway electrification system",
abstract = "A recuperating converter is highly demanded in traction power substation to deliver the braking energy generated by a traction vehicle. Conventional voltage source inverter had been implemented in the traction power station. However, large AC line filters must be installed to improve the quality of AC voltages and currents. This paper proposes to install a nine-level Modular Multilevel Converter (MMC) as a recuperating converter. The main aim is to eliminate the need of AC line filters while producing good quality of AC voltage and current waveforms. The MMC is designed and modelled using MATLAB/Simulink Simulation tool. A centralized control of balancing all the sub-module capacitor voltage level is proposed with Third Harmonic Voltage Injection Level Shifted Pulse Width Modulation (THVI-LSPWM) technique. The simulation results prove that with the application of MMC, good quality of ac voltages and currents are being produced. The Total Harmonic Distortion indexes are found less than 3.5 {\%} without using any AC line filters in the system. In addition, the classic DC link capacitance has also being eliminated.",
author = "Toh, {Chuen Ling} and Ooi, {Pei Cheng}",
year = "2020",
month = "3",
doi = "10.11591/ijpeds.v11.i1.pp151-159",
language = "English",
volume = "11",
pages = "151--159",
journal = "International Journal of Power Electronics and Drive Systems",
issn = "2088-8694",
publisher = "Institute of Advanced Engineering and Science (IAES)",
number = "1",

}

Design a nine-level modular multilevel converter for DC railway electrification system. / Toh, Chuen Ling; Ooi, Pei Cheng.

In: International Journal of Power Electronics and Drive Systems, Vol. 11, No. 1, 03.2020, p. 151-159.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Design a nine-level modular multilevel converter for DC railway electrification system

AU - Toh, Chuen Ling

AU - Ooi, Pei Cheng

PY - 2020/3

Y1 - 2020/3

N2 - A recuperating converter is highly demanded in traction power substation to deliver the braking energy generated by a traction vehicle. Conventional voltage source inverter had been implemented in the traction power station. However, large AC line filters must be installed to improve the quality of AC voltages and currents. This paper proposes to install a nine-level Modular Multilevel Converter (MMC) as a recuperating converter. The main aim is to eliminate the need of AC line filters while producing good quality of AC voltage and current waveforms. The MMC is designed and modelled using MATLAB/Simulink Simulation tool. A centralized control of balancing all the sub-module capacitor voltage level is proposed with Third Harmonic Voltage Injection Level Shifted Pulse Width Modulation (THVI-LSPWM) technique. The simulation results prove that with the application of MMC, good quality of ac voltages and currents are being produced. The Total Harmonic Distortion indexes are found less than 3.5 % without using any AC line filters in the system. In addition, the classic DC link capacitance has also being eliminated.

AB - A recuperating converter is highly demanded in traction power substation to deliver the braking energy generated by a traction vehicle. Conventional voltage source inverter had been implemented in the traction power station. However, large AC line filters must be installed to improve the quality of AC voltages and currents. This paper proposes to install a nine-level Modular Multilevel Converter (MMC) as a recuperating converter. The main aim is to eliminate the need of AC line filters while producing good quality of AC voltage and current waveforms. The MMC is designed and modelled using MATLAB/Simulink Simulation tool. A centralized control of balancing all the sub-module capacitor voltage level is proposed with Third Harmonic Voltage Injection Level Shifted Pulse Width Modulation (THVI-LSPWM) technique. The simulation results prove that with the application of MMC, good quality of ac voltages and currents are being produced. The Total Harmonic Distortion indexes are found less than 3.5 % without using any AC line filters in the system. In addition, the classic DC link capacitance has also being eliminated.

UR - http://www.scopus.com/inward/record.url?scp=85077844893&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85077844893&partnerID=8YFLogxK

U2 - 10.11591/ijpeds.v11.i1.pp151-159

DO - 10.11591/ijpeds.v11.i1.pp151-159

M3 - Article

AN - SCOPUS:85077844893

VL - 11

SP - 151

EP - 159

JO - International Journal of Power Electronics and Drive Systems

JF - International Journal of Power Electronics and Drive Systems

SN - 2088-8694

IS - 1

ER -