A scheduling method for multi-generator sets on a dynamic positioning offshore platform

Abstract

The invention provides a multi-generator set dispatching method for a power positioning marine platform. The method includes the steps of dispatching according to the energy consumption characteristics of each generator set and the output power proportion thereof, taking the combination of the products of the ratio of the output power of each generator set to the maximum power of the generator set and the ratio of the rated power of each generator to the maximum power of the generator set as feasible solutions, finding the global optimal solution with low energy consumption by using an annealing simulation way. According to the multi-generator set dispatching method, it is possible to reasonably distribute loads of generator sets of a ship and find a more optimized dispatching method from the energy consumption perspective on the basis of guaranteeing the safety of the ship, compared with an ordinary energy dispatching method of proportionally allocating.

Description

technical field The invention relates to the field of dynamic positioning ship energy dispatching, in particular to a dispatching method for multi-generating sets of a dynamic positioning ocean platform. Background technique Energy issues have become a top priority issue in economic development. With the continuous consumption of terrestrial energy, human beings are more and more eager to turn their attention to the ocean, and various ocean platforms have become a new research hotspot. However, ocean platforms are not only tools for obtaining energy, but also consume a lot of energy. important component of energy. The main function of the diesel engine on the offshore platform is to generate electricity. It is the heart of the offshore platform. Whether it can work normally will directly affect the normal operation of the platform. Diesel engines on offshore platforms consume a lot of energy during normal operation. When the same generating set is in standby, different e...

AI Technical Summary

Problems solved by technology

Offshore platforms often need to be positioned at a certain point on the sea while preventing subversion for various operations. Common positioning methods include anchoring positioning, dynamic positioning, anchoring positioning + dynamic positioning. In general water depth, the mooring of floating production systems The mooring system is mainly used, but as the water depth increases, the gripping force of the mooring system decreases, and the difficulty of anchoring increases. At the same time, the length and strength of the anchor chain of the mooring system increase, and the weight increases sharply. The cost of mooring anchor chains and installation costs soared, and its positioning function was also greatly restricted.

With the rapid development of the shipbuilding industry and ocean engineering, the traditional positioning system can no longer meet the requirements of deep-sea positioning operations, and the dynamic positioning system can solve this problem well. Its advantage is that the positioning cost will not decrease with the increase of water depth. increase, and the operation is more convenient, so the research on the dynamic positioning system has more and more practical significance

Dynamic positioning (DP) is a closed-loop control system. Its function is to continuously detect the deviation between the actual position of the ship and the target position without the help of the mooring system, and then according to the external disturbance force such as wind, wave, current, etc. Influence calculates the size of the thrust required to restore the ship to the target position, and distributes the thrust to each thruster on the ship, so that each thruster can generate corresponding thrust, so that the ship can maintain the required position on the sea level as much as possible. It includes fixed-point control (the thruster adopts low advance speed) and navigation control. Its advantage is that the cost of positioning will not increase with the increase of water depth, and the operation is relatively convenient; the disadvantage is that it increases energy consumption, and at the same time, once the equipment loses control, it will have serious consequences.

In summary, it can be seen that the existing technology ignores the energy characteristics of each generator set and distributes the load of each generator set in equal proportions.

Images