Energy management system based on hierarchical control

Abstract

The invention discloses an energy management system based on hierarchical control. The energy management system comprises a GPS module, a working condition prediction module, an energy management unit, an execution control unit and a battery state estimation unit, the GPS module sends a road condition information to the working condition prediction module, and the working condition prediction module comprises a driving working condition identification unit and a vehicle running state transition probability matrix. According to the energy management system, the hierarchical control principleis introduced so as to establish the pure electric vehicle capability management system, the system comprises two levels of control strategies, a top level strategy is an energy management strategy, aMarkov decision theory is used for establishing an energy optimization management model which is responsible for monitoring the energy flow of the whole pure electric vehicle power system, the targetpower of a motor is determined according to the current state of the system, a bottom level decision-making is the executive control unit, power distribution and motor control are carried out according to the current state of the system, so that the power requirements of the pure electric vehicle are met.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to an energy management system based on hierarchical control. Background technique [0002] New energy generally refers to renewable energy that is developed and utilized on the basis of new technologies, including solar energy, biomass energy, wind energy, geothermal energy, wave energy, ocean current energy, and tidal energy, as well as thermal cycles between the ocean surface and deep layers, etc. In addition, there are hydrogen energy, biogas, alcohol, methanol, etc., and coal, oil, natural gas, water energy and other energy sources that have been widely used are called conventional energy sources. With the limitation of conventional energy sources and the increasingly prominent environmental problems, New energy with the characteristics of environmental protection and renewable energy has attracted more and more attention from all countries. New energy vehicles are ...

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Problems solved by technology

[0002] New energy generally refers to renewable energy that is developed and utilized on the basis of new technologies, including solar energy, biomass energy, wind energy, geothermal energy, wave energy, ocean current energy, and tidal energy, as well as thermal cycles between the ocean surface and deep layers, etc. In addition, there are hydrogen energy, biogas, alcohol, methanol, etc., and coal, oil, natural gas, water energy and other energy sources that have been widely used are called conventional energy sources. With the limitation of conventional energy sources and the increasingly prominent environmental problems, The new energy with the characteristics of environmental protection and renewable has been paid more and more attention by various countries. New energy vehicles are a form of new energy applications, also known as electric vehicles. Vehicles required by road traffic and safety regulations have a relatively small impact on the environment compared with traditional vehicles, and their prospects are widely optimistic. The types of electric vehicles include pure electric vehicles, hybrid vehicles and fuel cell vehicles, but the performance of power batteries at this stage There are still technical bottlenecks. With the decline of power battery performance, the cruising range of pure electric vehicles will be significantly shortened, especially in urban driving conditions such as frequent starting, acceleration, and braking. The energy consumption of electric vehicles will increase and the cruising range will be significantly shortened. , severely restricts the use of pure electric vehicles, for this reason, we propose an energy management system based on hierarchical control

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