Electric propulsion ship alternating-current power supply system

Abstract

The invention relates to an electric propulsion ship alternating-current power supply system which is composed of diesel generator sets, a distribution panel, a propulsion system, and a daily transformer. The diesel generator sets comprise multiple main diesel generator sets and an auxiliary diesel generator set. The distribution panel is divided into areas according to the number of bus-bars, the areas are connected by a bus coupler switch, and the bus coupler switch is closed during normal operation. The outputs of the diesel generator sets are connected to the bus-bars. The distribution panel is configured with a power management system. The propulsion system is composed of a frequency converter with a reactive power compensation function, a three-phase alternating-current asynchronous motor and a propeller which are connected in sequence. The daily transformer provides power for the daily loads of a ship except the propulsion system. The diesel generator sets provide active power load of the propulsion system and the daily loads, and the frequency converter provides reactive power load of the daily loads. The problem that reactive power provided by generators is distributed unequally and the problem of active power consumption fed back when the propulsion system slows down are solved effectively.

Description

technical field [0001] The invention relates to a ship power system, in particular to an AC power supply system for electric propulsion ships. Background technique [0002] With the extensive application of electric propulsion systems on engineering ships, scientific research ships, offshore platforms and hybrid ships, practice has fully proved that electric propulsion ships have excellent control performance, low noise, flexible engine room layout and good economy. There are also some problems that need to be improved as described below. [0003] Because electric propulsion ships need to consider the problem of controlling harmonics, at present, frequency converters using multi-phase diode rectification are mainly used to provide energy for the propulsion system, but this solution must require corresponding phase-shifting transformers. For example, having two main propellers means With two more phase-shifting transformers of corresponding capacity, the demand for cabin spa...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems existing in the power supply of the ship propulsion system, and proposes an AC power supply system for electric propulsion ships, which can save the space of the engine room by saving the phase-shifting transformer, and can effectively solve the problem of balanced distribution of active power and reactive power in the system. The feedback energy of the

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