STADT delivered a presentation at the Blue Maritime Cluster seminar in Ålesund this week, addressing the topic of Reliability challenges in Maritime Hybrid Electric Power Systems. 

It was first highlighted from NTNU professor Vilmar Æsøy that different hybrid electric propulsion systems based on frequency converters and battery solutions are, to a significant extent, creating challenges related to for instance common mode voltage and their damaging consequences on elmotors, generators and mechanical machinery, and even the hull itself.

DNV confirmed also their awareness of these reliability consequences, and will intensify their focus on the regulatory aspects of it.

Also Sintef Energy presented their view on the problems.

The STADT presentation titled: “PWM vs. Sinusoidal AC Drive Technology.”

STADT’s position is that an electrical propulsion solution based on pure sinusoidal AC—without electromagnetic disturbances—can address most of these challenges, and assuring no stop in propulsion - by using the STADT Lean Propulsion ®.

Also the discussion of AC vs DC grid was debated. Clearly the DC grid contributes to the problems of poor reliability, of reasons discribed during the conference STADT confirmed. 

John O. Teige held the presentation from STADT.