Automation of shipboard generating plants, that started in 1960's, was primarily to satisfy the requirements for unattended machinery spaces. However, recent demands for “super-rationalized ships” that can be operated with a minimum crew and for “energy-saving ships” to cope with sky-rocketing fuel costs have necessitated more careful, get-to-the-point monitoring and control of shipboard generating plants and loads. This has led to the development of a power management system (PMS) . In general, this PMS performs the following functions:
1) Automatic start and stop control of generators according to changing power demands,
2) Optimum load sharing control of the running generators including exhaust-gas turbine driven generator and shaft driven generator, and
3) Start blocking of large motors.
The recent advancement of applied electronics, particularly in the microcomputer application technology, is tremendous and the use of microcomputers and related technology is now seen in almost all shipboard automation. This paper presents an outline of the power management system and microcomputer used in it.
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