Ship power system
The ship power system includes two parts: ship power station and ship power network. It is responsible for converting different forms of energy into electrical energy and transmitting and distributing the electrical energy to various power consumers. device tasks. The ship's electrical energy system includes: (1) a generator set composed of a prime mover and a generator; (2) distribution equipment (main distribution board) with various control, monitoring and protection electrical appliances; (3) wires and cables, etc. Grid. The ship's power system has some main parameters, which determine the types and specifications of the main electrical equipment on the ship. These parameters are: electricity system (AC or DC), voltage, frequency
Ship power station
A ship power station consists of a prime mover, a generator and ancillary equipment (combined into a generator set) and Made up of distribution boards. The generator set is a device that converts chemical energy into electrical energy, which is controlled and distributed through the switchboard. The prime mover that drives the generator is generally a diesel engine, steam turbine or gas turbine, and the corresponding generating set is called a diesel generating set, a steam turbine generating set or a gas turbine generating set.
In order to enable ships to provide continuous, reliable, economical and reasonable power supply under various working conditions, such as navigation, operation, berthing, emergency, etc., ships are often equipped with a variety of power stations . (1) Main power station, a power station that supplies power to the entire ship under normal circumstances. (2) Mooring power station, a power station that supplies power to the electrical loads of berthed ships when the ship is berthed and there is no shore power supply. (3) Emergency power station, a power station that supplies power to loads necessary to ensure the safety of the ship in an emergency. (4) Special power stations, such as radio communication equipment for the whole ship (such as transmitter and receiver, etc.), various navigation aids (radar, direction finder, depth sounder, etc.), intra-ship communication equipment (such as telephone, radio, etc.) and Power supply for signaling alarm systems. This type of electrical equipment is characterized by low power consumption, but has special requirements for the voltage, frequency, voltage stabilization and frequency stabilization performance of the power supply. Therefore, it is sometimes necessary to set up a special generator set or inverter device on the ship to supply power to weak current equipment or special equipment throughout the ship.
Ship Power Network
Electric energy is transmitted from the main switchboard (and emergency and berthing switchboards) through cables and passes through the intermediate power distribution devices (district switchboards, distribution boards). Distribution boxes, etc.) are sent to various electrical users, and the power network formed is the ship power network. The basic requirement for the ship's power grid is to have strong vitality, that is, the power grid is required to ensure continuous power supply to the load in the event of a fault or partial damage, limit the development of the fault, and limit the impact of the fault to the minimum range. All electrical equipment with similar properties on the ship are powered by corresponding independent power grids, which can be divided into: (1) Ship power grid, which is directly powered by the main switchboard and supplies electric drag for various ship auxiliary engines. (2) Lighting grid, providing lighting inside and outside the ship. (3) Weak current device power grid, including telegraph bells, rudder angle indicators, telephone equipment, fire alarm signals and alarm bells, etc. (4) Emergency power grid, including emergency lighting, emergency power (such as steering gear power supply), navigation aid power supply, etc. (5) Other device power grids, such as charging equipment, portable lights, etc.