Comprehensive ship electric propelling system and using method

Abstract

The invention discloses a comprehensive ship electric propelling system which comprises a power source management system, a diesel power generating unit, an energy storage device, a shore connection box, a floating hydraulic power generating device, a distribution type power generating device, propulsion motors and a propeller. The diesel power generating unit is electrically connected with a common direct-current bus through rectifiers and a supply power gauge in sequence. The energy storage device is electrically connected with the common direct-current bus through a bidirectional DC / DC convertor. The shore connection box, the floating hydraulic power generating device and the distribution type power generating device are electrically connected with the common direct-current bus through the fourth rectifier, the fifth rectifier and the sixth rectifier. The common direct-current bus is electrically connected with a first inverter / frequency converter, a second inverter / frequency converter, a third inverter / frequency converter and a fourth inverter / frequency converter through a load power gauge. The first inverter / frequency converter, the second inverter / frequency converter, the third inverter / frequency converter and the fourth inverter / frequency converter are electrically connected with the right propulsion motor, the left propulsion motor, auxiliary equipment and daily electric equipment correspondingly. The comprehensive ship electric propelling system is high in energy utilization rate and good in energy-saving and emission reduction effect.

Description

technical field [0001] The invention belongs to the technical field of ship power systems, and in particular relates to a ship comprehensive electric propulsion system and a usage method. Background technique [0002] There are three types of existing ship propulsion systems: [0003] 1. The traditional mechanical propulsion method, in which the diesel engine is connected to the propeller through the gearbox to propel the ship to sail. The power selection of the main power of the diesel engine is based on the maximum working condition that the ship’s power may encounter. Definitely, it has a large surplus power. In actual operation, the probability of encountering similar situations is very low. In addition, ships generally adopt energy-saving and consumption-reducing measures mainly to reduce the speed of the ship. As a result, in most cases, the power of the ship in actual operation often only accounts for 40-60% of the power, the active power of the diesel engine is in ...

AI Technical Summary

Problems solved by technology

The power supply of the power battery mainly depends on the shore power box, and photovoltaic power generation and wind power generation can only be used as a small supplement, which requires ships to berth frequently for charging, and the charging time is long, which is not suitable for long-distance sailing. At the same time, there is a large investment cost. , long charging time, and high requirements for charging facilities

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