Ship shore-based variable frequency power supply system

Abstract

The invention relates to a ship shore-based variable frequency power supply system. The system comprises a main monitoring system, a shore-based power supply sub-system, a junction box sub-system, a cable winding cylinder sub-system and a ship power supply sub-system, wherein independent communication channels are arranged between the main monitoring system and the shore-based power supply sub-system and between the main monitoring system and the junction box sub-system, the cable winding cylinder sub-system and the ship power supply sub-system are connected with the main monitoring system, a main monitoring system controller coordinatively controls each sub-system, and the functions of operation mode switching, output power baking switching, grid-connected mode switching, load transferring, protection, metering, human-machine interaction and the like are achieved. By the shore-based variable frequency power supply system, different power baking outputs can be achieved, a shore-based power supply loop is configured for a plurality of berths, a path of high-voltage three-phase sine-wave power supply output can be provided, multiple paths of low-voltage three-phase sine-wave power supply outputs also can be provided, and the size of each path of output power can be flexibly configured.

Description

technical field [0001] The invention belongs to the field of ship shore-based power supply, in particular to a ship shore-based frequency conversion power supply system. Background technique [0002] During the berthing of the ship at the port, some equipment on board cannot be shut down, and uninterrupted power supply must be provided for this part of the equipment. At this time, the power supply mainly depends on the diesel generators onboard the ships. The emissions after fuel oil combustion have become an important factor affecting the air quality of the port. At the same time, the operation of diesel generators has also caused noise pollution to the port. Reducing the discharge of pollutants when ships are in port is of great significance to the port's energy saving, emission reduction and environmental improvement. The use of shore-based power supplies to supply power to ships berthing at the port, and stopping the operation of the ship's own diesel generators during ...

AI Technical Summary

Problems solved by technology

In the existing ship shore-based power supply technology and scheme, both high-voltage boarding and low-voltage boarding adopt the "point-to-point" shore-based power supply mode, and a set of variable frequency power supply system is set for each berth, and the output voltage level of the variable frequency power supply and the maximum The capacity is fixed configuration, the cost is high, and the utilization rate of equipment is low; therefore, it is of practical significance to improve the utilization rate of shore-based power supply equipment

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