A ship shaft power generation system and its control method

Abstract

The invention discloses a ship shaft generator system and a control method thereof, so as to solve the problems that seamless switching between power generation voltage and a frequency of brushless doubly-fed machine stator and voltage and frequency of a ship power station can not be realized in the prior art and the system can not operate stably when the ship load changes suddenly. The system mainly comprises a grid-connected device (11), an input filter unit (12), a grid-side power unit (13), a machine-side power unit (14), an output reactor (15) and a control system (17), wherein the grid-connected device is connected with the grid-side power unit via the input filter unit; the machine-side power unit is connected with a control winding (3) via the output reactor; and the grid-side power unit and the machine-side power unit are in back-to-back connection. An industrial PC (18) acquires current, voltage, rotation speed and busbar voltage of the brushless doubly-fed machine respectively and the ship shaft generator system is stably controlled. The control method of the invention adopts vector control algorithm and can be used in the ship shaft generator system.

Description

technical field [0001] The invention relates to a ship shaft power generation system, in particular to a ship shaft power generation system based on a brushless double-fed motor and a control method thereof. Background technique [0002] Ship shaft power generation uses the power reserve of the ship's main engine to drive the shaft generator to generate electricity while the main engine drives the propeller to propel the ship, so that the ship basically does not use traditional diesel generators to generate electricity when sailing. This method has significant energy-saving effect. This is because the power of the main diesel engine is selected according to the maximum loading capacity and maximum speed when the ship chooses the power of the main diesel engine, with a margin of 10%-15%. If the sea condition and ship condition are good, the main diesel engine There will be a large power reserve that has not been fully utilized, which will cause most of the main diesel engine...

AI Technical Summary

Problems solved by technology

[0008] The invention provides a ship shaft power generation system and its control method, which solves the problem of slow response speed of the control system in the existing devices and control methods, and the inability to realize the voltage and frequency of the stator power generation of the brushless double-fed motor and the voltage and frequency of the ship power station. The seamless switching of frequency and the technical problem that the system cannot achieve stable operation when the load of the ship changes suddenly

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