Parameter optimization design method for fuzzy controller of composite power supply system

A technology of fuzzy controller and composite power supply, applied in battery/fuel cell control devices, design optimization/simulation, electric vehicles, etc., can solve the problem of difficulty in ensuring the reliability of the controller, save the debugging work of the controller, speed up the Design progress, the effect of improving operational reliability and stability

Active Publication Date: 2020-05-12
开沃新能源汽车集团股份有限公司
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  • Application Information

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Problems solved by technology

However, most power distribution controllers based on fuzzy logic often rely on engineering experience, and there is greater subjectivity in setting input and output variables and formulating fuzzy rules. When designers lack experience, they need to repeatedly correct fuzzy rules, which is difficult to ensure controller reliability

Method used

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  • Parameter optimization design method for fuzzy controller of composite power supply system
  • Parameter optimization design method for fuzzy controller of composite power supply system
  • Parameter optimization design method for fuzzy controller of composite power supply system

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] The present invention takes figure 1 The structure of a compound power system and its power distribution fuzzy controller shown as an example are described (this method is not only applicable to the structure of the compound power system, but also applicable to other compound power system structures), the structure of the compound power system includes as A lithium iron phosphate battery pack for the main battery, a lithium titanate battery pack as a secondary battery, a bidirectional DC-DC converter, a DC-DC controller, an inverter, and a motor. Among them, SOC LFP and SOC LTO They are the state of charge (SOC) of lithium iron phosphate battery and lithium titanate battery respectively. The motor sends a power demand signal to the DC-DC controller, and then the DC-DC controller sends titanium to the bidirectional DC-DC converter according to the power distrib...

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Abstract

The invention discloses a parameter optimization design method for a fuzzy controller of a composite power supply system. The method comprises the following steps: step 1, selecting the service life as an optimization target according to function demands of a composite power supply system, and optimizing controller parameters of a fuzzy controller; step 2, constructing a power distribution fuzzy controller, and setting the controller as a three-input-single-output structure; step 3, keeping the fuzzy control rule unchanged, and optimizing the weight of an input variable; step 4, optimizing a fuzzy control rule and input and output variable weights at the same time; and step 5, substituting the optimized input variable weight and the fuzzy control rule back to the fuzzy controller, and verifying the optimized control effect. According to the method, the controller parameters of the HESS fuzzy controller can be optimized, the performance of the HESS in the operation process can be improved, and the comprehensive performance of the electric vehicle is improved.

Description

Technical field: [0001] The invention relates to a parameter optimization design method for a fuzzy controller of a composite power supply system, which belongs to the field of composite power supply systems of new energy vehicles. Background technique: [0002] The development of new energy vehicle technology is an important decision in my country's science and technology strategy, and it is also the most effective way to solve the problems of environmental pollution and energy shortage. Among new energy vehicles, pure electric vehicles have become the focus of common attention in the industry and are the core contributor to the growth of new energy vehicle ownership. Compared with traditional internal combustion engine vehicles and hybrid vehicles, pure electric vehicles have many advantages such as high efficiency, energy saving and environmental friendliness. [0003] The power battery system is the only energy source during the driving of pure electric vehicles, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/16B60L58/18G06F30/20G06F111/04
CPCB60L58/16B60L58/18Y02T10/70
Inventor 李广民孙健张雁泽朱侗胡梦然
Owner 开沃新能源汽车集团股份有限公司
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