Plug-in hybrid power passenger vehicle energy management method based on self-adaptive equivalent minimum consumption strategy

Abstract

The invention relates to a plug-in hybrid power passenger vehicle energy management method based on a self-adaptive equivalent minimum consumption strategy, and belongs to the field of hybrid power passenger vehicle energy management. The plug-in hybrid power passenger vehicle energy management method comprises the steps that S1, a reference value of a power battery SOC is calculated according toa speed spectrum of a plug-in hybrid power passenger vehicle driving cycle; S2, a mathematical model, a longitudinal dynamic model, and a power balance equation between electronic devices of a power transmission system are established; S3,an objective function is established based on the self-adaptive equivalent minimum consumption strategy; S4, the Hamiltonian function is established by the objective function based on the Pontryagin minimum principle, and an optimal initial covariant variable value in the objective function is calculated by using the shooting method to obtain a power distribution strategy between an engine-generator unit and a battery unit. According to the plug-in hybrid power passenger vehicle energy management method based on the self-adaptive equivalent minimum consumption strategy, the process of working condition recognition prediction of the traveling speed is saved, operation is simpler and more convenient, calculation burden is small, the efficiency is high,and the result is strong in robustness.

Description

technical field [0001] The invention belongs to the field of energy management of hybrid electric passenger vehicles, and relates to an energy management method for plug-in hybrid electric passenger vehicles based on an adaptive equivalent consumption minimum strategy. Background technique [0002] In recent years, as the problems of air pollution and energy shortage have become more and more serious, and pure electric vehicles are limited by issues such as cruising range, plug-in hybrid electric vehicles have been widely used, and plug-in hybrid electric vehicles can not only improve Fuel economy, and can overcome the problem of short mileage of pure electric vehicles. Energy management strategy is the key technology of plug-in hybrid electric vehicles. At present, some energy management strategies have been applied, such as energy management strategies based on Pontryagin's minimum principle and energy management strategies based on dynamic programming algorithms, etc. . ...

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Problems solved by technology

However, these methods all have some disadvantages. For example, the dynamic programming algorithm has a heavy computational burden due to a large number of discrete states and input points; , so it is not easy to directly obtain the numerical solution of

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