An investigation of high efficiency DC-AC converters for LVDC distribution networks

Author

Yanni Zhong ; Finney, Stephen ; Holliday, Derrick

Author_Institution

Dept. of Electron. & Electr. Eng., Univ. of Strathclyde, Glasgow, UK

fYear

2014

fDate

8-10 April 2014

Firstpage

1

Lastpage

6

Abstract

Low voltage DC (LVDC) distribution systems offer improved efficiency and reliability in smart grids. A major challenge facing LVDC systems is DC-AC conversion. A study of an effective low voltage DC-AC converter is therefore presented. Modular Multilevel Converter (MMC) performance (in particular power loss) is compared with a conventional IGBT-based 2-level converter and its advantages highlighted. A phase-shifted sinusoidal PWM based individual voltage balancing strategy for the MMC is presented. A proportional-resonant controller is introduced to eliminate the 2^nd harmonic circulating current in the H-bridge MMC converter.

Keywords

DC-AC power convertors; insulated gate bipolar transistors; power distribution reliability; smart power grids; 2^nd harmonic circulating current; DC-AC conversion; H-bridge MMC converter; IGBT-based 2-level converter; LVDC distribution networks; LVDC systems; MMC performance; high efficiency DC-AC converters; low voltage dc distribution systems; modular multilevel converter performance; phase-shifted sinusoidal PWM; proportional-resonant controller; smart grids; voltage balancing strategy; Capacitor Voltage Balance Control; LVDC; Loss Calculation; MMC;

fLanguage

English

Publisher

iet

Conference_Titel

Power Electronics, Machines and Drives (PEMD 2014), 7th IET International Conference on

Conference_Location

Manchester

Electronic_ISBN

978-1-84919-815-8

Type

conf

DOI

10.1049/cp.2014.0283

Filename

6836828