Electric push ferry energy management method based on demand side power optimization

Abstract

The invention relates to an electric propulsion ferry energy management method based on demand side power optimization. The electric propulsion ferry energy management method comprises the following steps: 1) deducing a mathematical model of navigational speed and propulsion power according to a ferry working condition and power condition table; 2) segmenting the ferry route, and establishing a navigational speed optimization model by combining the stability constraint of a power system and the distance constraint of the ferry route and taking the minimum fuel consumption as a target; 3) performing optimization solution on the navigational speed optimization model by using an intelligent algorithm; and 4) the demand side power is adjusted according to the optimized navigational speed, so that a diesel generator and a battery can better coordinate to output power, and fuel consumption and pollutant emission are analyzed. According to the method, the demand side power is optimized through the known route and the electric push ferry power condition table, the energy adjusting function of the energy storage device is fully played, the diesel generator works in the interval with the highest fuel efficiency as much as possible, and fuel consumption and pollution emission are reduced to the maximum extent.

Description

technical field [0001] The invention belongs to the field of hybrid power ship energy management strategies, in particular to a ferry energy management method equipped with a diesel generator, a hybrid power system of an energy storage system and an all-electric propulsion system. Background technique [0002] The energy consumption of the shipping industry has received extensive international attention. In June 2021, the 76th meeting of the Marine Environment Protection Committee of the International Maritime Organization (IMO) (MEPC76) adopted the amendment to Annex VI of the MARVEL Convention, which aims to Improve ship energy efficiency, reduce fuel consumption, and further restrict ship emissions. In order to realize the greening of the shipping industry, the Ministry of Transport of my country has also issued a series of program documents to promote the use of clean energy. [0003] At present, there have been many studies on how to improve the energy efficiency of sh...

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Problems solved by technology

[0003] At present, there have been many studies on how to improve the energy efficiency of ships and reduce pollution emissions

On the one hand, the energy management strategy based on intelligent algorithms has been proven to reduce fuel consumption in terms of power allocation between diesel generators and energy storage. However, the demand-side power of a ferry sailing cycle is certain, and the energy demand is relatively fixed. As an auxiliary power system for “shaving peaks and filling valleys” of demand power, energy storage does not play a high role. Therefore, the energy saving effect of this method is limited, and can only achieve a fuel reduction effect of about 2%. Responsive power allocation methods have achieved good results in recent years. This method achieves the optimal energy mix through energy quota planning in the data center, thereby minimizing fossil energy costs and carbon emissions; The realization in the power grid has inspired the application of power optimization based on the demand side in the direction of the ship. Some foreign scholars have adjusted the speed of the ship under some working conditions to make the propulsion curve tend to be stable, which can better reduce fuel consumption.

However, with the increasing application of energy storage systems on ships, existing studies have not considered the beneficial effects of adding energy storage systems

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