IGBT (Insulated Gate Bipolar Translator) thermal management method and system for doubly-fed fan converter and storage medium

A doubly-fed wind turbine and converter technology, which is applied in the direction of wind power engine, machine/engine, wind power motor combination, etc., can solve the problems of life consumption, large proportion of low-frequency junction temperature fluctuations, and the inability to perform accurate quantitative control of thermal management, etc. , to achieve the effect of ensuring accuracy and scientificity and improving accuracy

Pending Publication Date: 2022-04-26
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

Under turbulent wind speed, low-frequency junction temperature fluctuations account for a large proportion, and when the intensity is large, it will cause great life consumption in a

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  • IGBT (Insulated Gate Bipolar Translator) thermal management method and system for doubly-fed fan converter and storage medium
  • IGBT (Insulated Gate Bipolar Translator) thermal management method and system for doubly-fed fan converter and storage medium
  • IGBT (Insulated Gate Bipolar Translator) thermal management method and system for doubly-fed fan converter and storage medium

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[0056] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, giving a detailed embodiment and a specific operating process, but the scope of protection of the present invention is not limited to the following embodiments.

[0057] The present embodiment provides a doubly fed fan converter IGBT thermal management method, comprising the following steps:

[0058] Step S1: Obtain the real-time wind speed through the wind speed detection device, and calculate the first power, the first power P m The evaluation expression for is as follows:

[0059] P m ＝0.5ρπR 2 v 3 C P (λ,β)

[0060] where ρ represents the density of the air; R represents the radius of the wind wheel; v represents the wind speed; and C P Represents the wind energy utilization coefficient associated with pitch angle β and blade tip velocity lambda....

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Abstract

The invention relates to a doubly-fed fan converter IGBT thermal management method and system and a storage medium, and the method comprises the following steps: obtaining a real-time wind speed, and calculating first power; establishing a wind speed-junction temperature fitting curve according to the corresponding junction temperature data under different wind speeds, and acquiring a first wind speed range by using the wind speed-junction temperature fitting curve according to the junction temperature threshold range; decomposing and reconstructing the real-time wind speed by using a wavelet packet algorithm, repeatedly decomposing and reconstructing the second wind speed, and calculating to obtain second power by using the current second wind speed when the second wind speed is within the first wind speed range; comparing the first power with the second power, and if the second power is small, setting the fourth power as the second power; if the first power is small, whether the fan stalls or not is judged, fourth power is set according to the result, and finally, the third power is output to a doubly-fed fan converter IGBT module. Compared with the prior art, the method has the advantages of high accuracy and the like.

Description

technical field [0001] The invention relates to the field of thermal management of converters, in particular to a thermal management method, system and storage medium of an IGBT of a double-fed fan converter. Background technique [0002] As the hub of the wind energy conversion system, the wind power converter has been in random and intermittent operation conditions for a long time, and the IGBT has become the module with the highest failure rate, and it is very easy to cause chain failures in the system. In areas such as offshore wind power and mountainous tuyere, the machine-side converter of the Doubly Fed Induction Generator (DFIG) frequently switches between the rectification and inverter operating modes, and the IGBT junction temperature fluctuation increases. Although the thermal management strategy of the wind turbine variable flow system under normal wind speed conditions is relatively mature, compared with normal conditions, turbulent wind presents a faster change...

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Application Information

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IPC IPC(8): F03D9/25F03D7/00F03D17/00G06F17/10
CPCF03D9/25F03D7/00F03D17/00G06F17/10Y02E10/72
Inventor 崔昊杨郭天柱戴莹莹伍娟董杰彭道刚陈磊江超胡安铎
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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