“A Compendium of Problems Related to Ship Design from an Electrical
Engineering Point of View”
by Petros Lalangas
On May 20th the
Greek Section had its ninth monthly technical meeting for the 2009-10 season, during
which Assist Prof John Prousalidis of the School of NA & ME at the National
Technical University of Athens (NTUA) presented the subject topic in the
presence of some 40 members & guests.
As the
author pointed out, the extensive electrification of all systems aboard, leads
up to the All Electric Ship in the near or distant future and turns the
electric energy systems into the main core unit of a ship. Hence, the design and the operation of this
system is of primary importance from all points of view.
The
presentation dealed with meeting the electric power demands of the electric
loads installed in both steady-state and transient state of operation. This requires:
-
Good load prediction at the
design stage (mainly at the electric load balance analysis)
-
Good design of all sub-systems
(mainly generation and distribution ones)
-
Efficient management of both
available electric energy and electric loads (mainly via the Electric Power
Management and Control System)
The presentation
covered all these three areas providing a description of the way this is to be
done within the frame of “low fuel consumption, low emissions, high efficiency”
desired by all operators.. Thus, courses
of actions and measures were recommended to face the following problems:
-
assessment of service load
factors at the electric load analysis
-
setting minimum operation
generator principles
-
power quality problems and
-
on-line power management
Finally in this theoretical presentation the author discussed the topics of:
Power supply quality phenomena; Voltage dips, transients & spikes and
Future trends for electrification.
After this very useful presentation the normal reception took place for all
in an adjacent hall of our great hosts, the Maran Tankers, Inc.
from left to right:
N. Dionissopoulos, Membership Chair; Prof Emer. A. Antoniou; J. Prousalidis, Author; P. Lalangas, Chair.