Electric propulsion redundancy control method for ship

Abstract

The invention relates to an electric propulsion redundancy control method for a ship. The method is characterized in that two electric propulsion control systems are arranged, wherein each electric propulsion control system has two control programs. During normal operation, each electric propulsion control system uses one control program to independently work, and at the same time, two programmable logic controllers mutually and regularly receive the operational data of the other control program. When a control failure occurs, normally one programmable logic controller undertakes the control operation of the other programmable logic controller so as to simultaneously operate the two control programs. When the control failure recovers, the programmable logic controller with failure recovery sends a signal to the control system operating normally, the programmable logic controller operating normally sends operational data to the recovered programmable logic controller, and the recovered programmable logic controller takes over the system control. When a control core of any one electric propulsion control system fails, the normal propulsion operation of the ship is not influenced, and the safety and the stability of the ship are improved.

Description

Technical field [0001] The invention relates to a ship automation technology, in particular to a ship electric propulsion redundant control method. Background technique [0002] With the vigorous development of ships and marine engineering, the control requirements for ship power are getting higher and higher, and the traditional main engine with propellers cannot meet the high-precision control requirements. Electric propulsion ships are being recognized by users and crews for their excellent control performance, low noise and energy saving advantages. [0003] The ship’s electric propulsion control system has corresponding requirements in the specifications of foreign classification societies and China Classification Society. Each propulsion control system must have relatively independent control functions in normal operation to avoid failure of any propulsion control system. At that time, there was still an electric propulsion system that could operate. [0004] The existing de...

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Problems solved by technology

[0005] 1. Generally, an independent control system is used, and there is no connection between the two systems. Once a problem occurs in one system, the power and efficiency can only be reduced and only one set of electric propulsion system will be operated.

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