Monitoring control and safety assessment method of ship electric propulsion and control system

Abstract

The invention discloses a ship electric propulsion and control system, which adopts three layers of local monitoring, in-ship monitoring and shore monitoring to jointly monitor the power quality of the electric propulsion system, which can effectively prevent maintenance personnel from being unable to supervise the electric propulsion system in time due to the failure of a single monitoring device The situation greatly improves the safety of ship navigation. The electric propulsion system adopts four levels of redundancy settings, including power distribution system redundancy, propulsion system redundancy, propulsion power source redundancy and propulsion equipment redundancy, to ensure that the ship can maintain the ship's operation to the maximum extent even in the event of a serious failure , to ensure the safety of the ship from the equipment level. This law also discloses the monitoring control and safety assessment methods of the system.

Description

technical field [0001] The invention relates to the field of marine engineering equipment, in particular to a monitoring control and safety assessment method for a ship electric propulsion device. Background technique [0002] The electric propulsion device of traditional ships adopts the method of connecting the diesel engine to the gearbox to drive the propeller. This driving method makes the shafting arrangement difficult and requires high manual operation. Moreover, each stage of the mechanical structure will cause a certain amount of energy loss. Relatively High energy consumption. In the paper "Development Advantages of Ship DC Networking Electric Propulsion Technology", it is pointed out that ships driven by electric propulsion devices generally have complex topology structures and various electronic components, and it is difficult to guarantee the power quality of each component of the power system, making the entire power system The stability of the propulsion devi...

AI Technical Summary

Problems solved by technology

[0002] The electric propulsion device of traditional ships adopts the method of connecting the diesel engine to the gearbox to drive the propeller. This driving method makes the shafting arrangement difficult and requires high manual operation. Moreover, each stage of the mechanical structure will cause a certain amount of energy loss. Relatively high energy consumption

In the paper "Development Advantages of Ship DC Networking Electric Propulsion Technology", it is pointed out that ships driven by electric propulsion devices generally have complex topology structures and various electronic components, and it is difficult to guarantee the power quality of each component of the power system, making the entire power system The stability of the propulsion device is also difficult to guarantee

However, the existing patents, such as patents CN201621326228.0, CN201720775017.3, CN201621326217.2, etc., have not set up a monitoring system for electric propulsion ships, and cannot detect the operation status of electric propulsion devices in time, estimate the safety of ship navigation, and resist risks. Poor, it is difficult to meet the operational needs of ships in complex sea conditions

In addition, at present, the power quality supervision object of most marine electric propulsion devices is to install testing equipment at important electronic components and set up alarm equipment (the paper "Development of On-line Monitoring and Diagnosis System for Ship Power Electric Propulsion Device"), which has a certain Intelligent, but lacks technical measures for pre-judgment and control of equipment or line failures. It is only checked and repaired by maintenance personnel afterwards. The maintenance work is very cumbersome and time-consuming

[0003] In the paper "Design of Power Quality Monitoring System for Electric Propulsion Ships Based on Internet of Things Technology", a set of power quality monitoring is designed for key parameters required by industry standards, such as voltage and frequency, waveform and distortion, and three-phase voltage unbalance. system, but does not take into account other fault sources of the power system, and does not involve fault control strategies that affect the safety of the power system

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