06-08-2016, 03:16 PM
Flexible Ship Electric Power System Design
Abstract
This paper discusses new techniques which will
reduce manning requirements and increase the
reliability of continuous service through
automation of functions related to the ship's
electrical system. Its functions include
monitoring and control, automated system
failure analysis and identification, automated
intelligent system reconfiguration and
restoration, and self-optimizing power system
architecture under partial failure.
New materials such as high energy magnets and
high temperature superconductors are either
available or on the horizon. New technologies
are an important driver of new power system
concepts and architectures.
This paper also introduces new approaches for
designing ship power systems by using several
new technologies.
Introduction
The first electrical power system was installed
on the USS Trenton in 1883 (Ykema 1988).
The system consisted of a single dynamo
supplying current to 247 lamps at a voltage of
110 volts d.c. Until the 1914 to 1917 period, the
early electrical power systems were principally
d.c. with the loads consisting mainly of motors
and lighting. It was during World War I that
230 volt, 60 hertz power systems were seriously
introduced into naval vessels. Since World War
II the ship’s electrical systems have continued to
improve, including the use of 4,160 volt power
systems and the introduction of electronic solidstate
protective devices.
Protective devices were developed to monitor
the essential parameters of electrical power
systems and then through built-in logic,
determine the degree of configuration of the
system necessary to limit the damage to
components and equipment and to enhance the
continuity of electric service for the vessel
(Ykema 1988).
Fuses are the oldest form of protective devices
used in electrical power systems in commercial
systems and on navy vessels. Circuit breakers
were added around the turn of the century. The
first electronic solid-state overcurrent protective
device used by the Navy was installed on the
4,160 power system in Nimitz class carriers.
Navy systems of today supply electrical energy
to sophisticated weapons systems,
communications systems, navigational systems,
and operational systems. To maintain the
availability of energy to the connected loads to
keep all systems and equipment operational, the
navy electrical systems utilize fuses, circuit
breakers, and protective relays to interrupt the
smallest portion of the system under any
abnormal condition.
The existing protection system has several
shortcomings in providing continuous supply
under battle and certain major failure
conditions. The control strategies which are
implemented when these types of damage occur
are not effective in isolating only the loads
affected by the damage, and are highly
dependent on human intervention to manually
reconfigure the distribution system to restore
supply to healthy loads.
This paper discusses new techniques which aim
to overcome the shortcomings of the protective
system. These techniques are composed of
advanced monitoring and control, automated
failure location, automated intelligent system
reconfiguration and restoration, and selfoptimizing
under partial failure.
Abstract
This paper discusses new techniques which will
reduce manning requirements and increase the
reliability of continuous service through
automation of functions related to the ship's
electrical system. Its functions include
monitoring and control, automated system
failure analysis and identification, automated
intelligent system reconfiguration and
restoration, and self-optimizing power system
architecture under partial failure.
New materials such as high energy magnets and
high temperature superconductors are either
available or on the horizon. New technologies
are an important driver of new power system
concepts and architectures.
This paper also introduces new approaches for
designing ship power systems by using several
new technologies.
Introduction
The first electrical power system was installed
on the USS Trenton in 1883 (Ykema 1988).
The system consisted of a single dynamo
supplying current to 247 lamps at a voltage of
110 volts d.c. Until the 1914 to 1917 period, the
early electrical power systems were principally
d.c. with the loads consisting mainly of motors
and lighting. It was during World War I that
230 volt, 60 hertz power systems were seriously
introduced into naval vessels. Since World War
II the ship’s electrical systems have continued to
improve, including the use of 4,160 volt power
systems and the introduction of electronic solidstate
protective devices.
Protective devices were developed to monitor
the essential parameters of electrical power
systems and then through built-in logic,
determine the degree of configuration of the
system necessary to limit the damage to
components and equipment and to enhance the
continuity of electric service for the vessel
(Ykema 1988).
Fuses are the oldest form of protective devices
used in electrical power systems in commercial
systems and on navy vessels. Circuit breakers
were added around the turn of the century. The
first electronic solid-state overcurrent protective
device used by the Navy was installed on the
4,160 power system in Nimitz class carriers.
Navy systems of today supply electrical energy
to sophisticated weapons systems,
communications systems, navigational systems,
and operational systems. To maintain the
availability of energy to the connected loads to
keep all systems and equipment operational, the
navy electrical systems utilize fuses, circuit
breakers, and protective relays to interrupt the
smallest portion of the system under any
abnormal condition.
The existing protection system has several
shortcomings in providing continuous supply
under battle and certain major failure
conditions. The control strategies which are
implemented when these types of damage occur
are not effective in isolating only the loads
affected by the damage, and are highly
dependent on human intervention to manually
reconfigure the distribution system to restore
supply to healthy loads.
This paper discusses new techniques which aim
to overcome the shortcomings of the protective
system. These techniques are composed of
advanced monitoring and control, automated
failure location, automated intelligent system
reconfiguration and restoration, and selfoptimizing
under partial failure.
