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

Variable speed drive

Voltage Source Converter (VSC)

Overvoltage minimization

Multilevel converters

AC-cable

Passive filter

Author

Carl Larsson

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Andreas Rydgård

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Georgios Mademlis

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Yujing Liu

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Magnus Fredriksson

Minesto

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

8915441

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

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

European Commission (Horizon 2020), 2016-01-01 -- 2018-06-30.

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.23919/EPE.2019.8915441

More information

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7/2/2020 4