Cooperative control method and system for ship self-flowing cooling system and power system

Abstract

The invention provides a cooperative control method and system for a ship self-flowing cooling system and a power system, and the method comprises the steps: collecting the navigational speed of a ship and the actual rotating speed of a propeller in the power system in real time, and obtaining the current cooling margin of the self-flowing cooling system; setting the safety margin of the minimum lifting power of the power system in the ship navigation acceleration process; according to an equal margin control strategy, obtaining the safe rotating speed of the propeller based on the current cooling margin and the safety margin; and judging the size relationship between the input reference rotating speed and the actual rotating speed difference value, and executing the corresponding safe rotating speed control state and the reference rotating speed control state or keeping the original control state. For solving the failure problem of the self-flowing cooling system in the power increasing process of a ship power system adopting a self-flowing cooling system, the cooling margin of the self-flow cooling system is defined and monitored, and an equal margin control strategy is adopted,so that the ship body navigational speed, the power system and the self-flowing cooling system can work cooperatively.

Description

technical field [0001] The invention relates to the technical field of ship power system control, in particular to a cooperative control method and system of a ship's artesian cooling system and power system. Background technique [0002] Artesian cooling is an essential part of the ship, and the artesian cooling system is an important part of the ship's power system, supporting the normal operation of the ship's power system. The cooling water system is a ship-sea system with large seawater flow and large pipe diameter. The seawater pump is noisy during operation, and has a large energy consumption, which is not economical. The artesian cooling system is a new type of cooling water system, which utilizes the dynamic pressure during sailing to allow seawater to flow through the cooler through the water inlet device, thereby eliminating the need for seawater pumps, which can reduce the noise of the cooling water system and improve the economy of the power system It is an imp...

AI Technical Summary

Problems solved by technology

However, when the artesian cooling system actually operates within a certain range of ship speed, the power system, ship speed, and artesian cooling system are dynamically coupled, and the working states of the three will be delayed in turn during the power-up stage, that is, the power system needs to increase the power first. When the ship is accelerated, the cooling seawater supply capacity of the artesian cooling system will increase only after the ship accelerates. This feature causes the cooling demand of the power system to rise rapidly, and the cooling seawater supply capacity of the artesian cooling system will rise slowly under the dominance of the ship's movement speed. Compared with In this case, the cooling seawater flow provided by the artesian cooling system is insufficient, and an additional water pump must be started to increase the cooling seawater flow, which eventually leads to the failure of the artesian cooling system in the design speed area

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