Overvoltage Mitigation of Medium Voltage Electric Drives with Long Cables using Multilevel-Converters and Passive Filters
Paper in proceeding, 2019

Variable-speed drives with long cables between the electrical machine and the power converters suffer from overvoltages at the connection terminals of the cables. These overvoltages which are caused by reflections of the PWM voltage pulses to the two ends of the cable are investigated in this paper. Suitable passive filters are proposed in order to mitigate the overvoltages to an acceptable level, which is not harmful for the devices of the system. Additionally, the use of multilevel power converters can help to minimize the size of the passive filters. The filter design for drives with up to 7-level converters is described in this paper and simulations results on LTspice are presented in order to validate the mathematical analysis.

Multilevel converters

Overvoltage minimization

AC-cable

Variable speed drive

Passive filter

Voltage Source Converter (VSC)

Author

Carl Larsson

Chalmers, Electrical Engineering, Electric Power Engineering

Andreas Rydgård

Chalmers, Electrical Engineering, Electric Power Engineering

Georgios Mademlis

Chalmers, Electrical Engineering, Electric Power Engineering

Yujing Liu

Chalmers, Electrical Engineering, Electric Power Engineering

Magnus Fredriksson

Minesto

2019 21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe

8915441
978-907581531-3 (ISBN)

21th European Conference on Power Electronics and Applications
Genova, Italy,

Power Take-Off System for a Subsea Tidal Kite (PowerKite)

European Commission (EC) (EC/H2020/654438), 2016-01-01 -- 2018-06-30.

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.23919/EPE.2019.8915441

More information

Latest update

3/21/2023