Ship gas-electric hybrid power mode switching coordination control strategy

Abstract

The invention provides a hybrid power ship mode switching control strategy. According to the mode switching control strategy, firstly, a hybrid power operation mode is divided into four modes of motor independent propulsion, gas machine independent propulsion, gas machine and motor combined propulsion and charging propulsion. The strategy is mainly characterized by comprising the following steps: firstly, calculating the total torque demand required by the ship during operation, and formulating a mode switching control rule by taking optimization of the operation efficiency of a gas engine as a principle according to the operation demand torque and the value of the SOC of a power battery; and when the operation condition of the hybrid power system changes and the mode switching condition is met, the hybrid power assembly controller coordinates all parts of the power system to be switched to the target mode. The target mode of the hybrid power system when the operation condition is changed is formulated according to the ship operation demand torque and the power battery, the system operation efficiency is improved, fuel oil is saved, the operation performance of the hybrid power ship is improved, and the service life of the power battery is prolonged.

Description

technical field [0001] The invention relates to a ship gas-electric hybrid mode switching control strategy, in particular to a switching control method and system for a hybrid ship in multiple working modes. Background technique [0002] In recent years, with the increasingly prominent global environmental and energy issues and the rapid rise of international oil prices, the development of new ships with low emissions and low fuel consumption has become the primary task of the development of the shipbuilding industry today. [0003] Pure electric propulsion ships have the advantages of good economy, maneuverability, safety, low noise and low pollution, and are one of the directions of future ship power technology research. However, due to the influence of power generation methods, power density and energy storage technology, pure electric propulsion ships at this stage cannot fully meet people's needs for speed, acceleration and maneuverability, and their endurance is also r...

AI Technical Summary

Problems solved by technology

However, in the process of switching between modes of the hybrid power system, if a reasonable mode switching control strategy cannot be formulated, the advantages of hybrid power in terms of fuel economy and emissions cannot be fully utilized, and it may cause frequent mode switching, which is harmful to the marine transmission system. cause shock and reduce its life

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