Ship electrical power supply

Abstract

Power supplies for the sea going crafts take a lot of forms, that is direct current and alternating supplies. A.C. currents may be found in a variety of frequencies. Small boats, do need, if any, little power which can be supplied from batteries or sometimes from small portable generators. These crafts usually need less than a few hundreds of watts. The loads are lighting, navigation lighting, and power for self starting engines. As the size of the craft is increased the load demand increases rapidly since these usually fall under the category of leisure boats, one would expect to find certain commodities apart from the ship’s necessities which are needed such as pumps, whinch motors, etc. The types of supplies dealt with in this project report are those found on ships demanding from 100 to 2000 K.W. The most common modern systems encountered on ships are 380V 3ph 50Hz and the 440V 3ph 60 Hz. D.C. supplies are still much common on existing ships of the older type so this project will also contain a brief review about D.C. generation as applied for ships. The sources of power on ships may also be, or part of it be, the battery. As stated this project will consider: Batteries ; generators ; dc generators ; ac generators