Maximum power tracking method for vehicle waste heat power generation system

A technology of maximum power tracking and thermal power generation system, which is applied in the direction of control/regulation system, regulation of electrical variables, instruments, etc., to achieve the effects of improving system efficiency, high-precision maximum power operation, and reducing oscillation amplitude

Inactive Publication Date: 2018-08-24
JIANGSU UNIV
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Problems solved by technology

[0006] The present invention proposes a maximum power tracking method based on the constant voltage method and the hysteresis comparison method in order to solve the deficiency of the existing maximum power tracking algorithm used in the automobile exhaust waste heat recovery system

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  • Maximum power tracking method for vehicle waste heat power generation system
  • Maximum power tracking method for vehicle waste heat power generation system
  • Maximum power tracking method for vehicle waste heat power generation system

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the protection scope of the present invention is not limited thereto.

[0032] Such as figure 1 As shown, the maximum power tracking method of a vehicle waste heat power generation system designed in the present invention, the vehicle waste heat power generation system is a thermoelectric power generation system, which consists of a hot end (vehicle exhaust gas), a cold end (engine coolant or natural wind) and multiple The thermoelectric generators are connected in series and parallel. Follow the steps below:

[0033] The maximum power tracking method combines the constant voltage method with the small-step hysteresis comparison method, and the open circuit voltage V of the thermoelectric module in the vehicle waste heat power generation system is oc When the external conditions change, the maximum power point voltage V of the thermoelectric module ...

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Abstract

The invention discloses a maximum power tracking method for a vehicle waste heat power generation system. The three-stage maximum power tracking method combines a constant voltage method and a small-step-size hysteresis comparison method; according to the first stage, the constant voltage method is used for rapidly tracking the position nearby the maximum power point of a temperature difference power generation system; according to the second stage, the small-step-size hysteresis comparison method is adopted for accurately tracking the maximum power point of the temperature difference power generation system; according to the third stage, a timer is applied for performing timing skipping, the system collects open-circuit voltage again for tracking the maximum power, and therefore rapid maximum power point tracking and high-precision maximum power point operation are achieved. The problem that oscillation, misjudgment and the like are caused near the maximum power point according to a conventional perturbation and observation method can effectively solved, the tracking speed is increased, the tracking precision is improved, and rapid high-precision maximum power tracking operation of the vehicle waste heat power generation system is achieved.

Description

technical field [0001] The invention belongs to the field of thermoelectric power generation, and relates to a maximum power tracking method for a vehicle waste heat power generation system. Background technique [0002] The thermoelectric generator can recover the heat energy in the waste heat of vehicle exhaust, and the real-time tracking of the maximum power of the thermoelectric generator under different vehicle conditions has become the focus of research on the recovery of waste heat energy. At present, the most common methods of maximum power tracking include constant voltage method, perturbation and observation method, conductance increment method and so on. [0003] According to the output characteristics of the thermoelectric conversion module, when the open circuit voltage of the thermoelectric module changes under the vehicle conditions, the voltage at the maximum power point of the thermoelectric module also changes approximately proportionally. The constant volt...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/67
CPCG05F1/67
Inventor 汪若尘周润泽余未孟祥鹏陈龙
Owner JIANGSU UNIV
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