Demanded power predication based variable-area optimal energy management control method and device

Abstract

The invention discloses a demanded power predication based variable-area optimal energy management control method and device, and belongs to the field of hybrid power off-road vehicle energy management. The method comprises the following steps: selecting longitudinal vehicle speed and longitudinal accelerated speed as predicating variables by designing a self-adaptive Markov chain forecasting method, thereby realizing indirect predication of demanded power; controlling the vehicle to work in two different drive modes by calculating and comparing equivalent energy consumption of a hybrid drivemode with that of a pure electric mode in real time; taking the equivalent fuel oil consumption minimum control strategy as developing basis, considering traveling working condition characteristics and demand characteristics of the off-road vehicle, performing real-time solving of an optimizing area according to a demand powder variable, and designing a variable-area equivalent fuel oil consumption minimum control strategy. The demanded powder predication method can improve demanded powder predication precision and self-adaption as well as power system response characteristics, reasonably switches a working mode, optimizes general energy consumption characteristics of the system, and improves travelling stability while guaranteeing working stability of the power system.

Description

technical field [0001] The invention belongs to the field of energy management of hybrid off-road vehicles, and more specifically relates to a variable domain optimal energy management control method and device based on demand power prediction. Background technique [0002] Although the development of pure electric vehicles is becoming more and more mature, key technologies such as power batteries still need to be perfected. Hybrid electric vehicles have two or three power sources such as engine, power battery or super capacitor, and can rely on one or two of them to drive the vehicle. Therefore, the working mode of hybrid electric vehicles is more diversified. In terms of energy saving and emission reduction Has great potential for development. [0003] For off-road vehicles, the mass of the vehicle itself is large, the driving conditions are complex, the power demand changes greatly, and the power output lasts for a long time. Traditional off-road vehicles use a high-pow...

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Problems solved by technology

[0007] In view of the above defects or improvement needs of the prior art, the present invention provides a variable-domain optimal energy management control method and device based on demand power prediction, thereby solving the limitations of the application conditions of the prediction algorithm in the prior art and the The technical problem of poor system responsiveness and stability under global optimal control

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