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Traction converter thermal field control method and system

A traction converter and field control technology, which is applied in the conversion of AC power input to AC power output, output power conversion devices, electrical components, etc., can solve the problem of increased maintenance costs, waste of resources, and thermal stress of traction converters Neglect and other problems to achieve the effect of reducing equipment maintenance costs, improving reliability and extending service life

Active Publication Date: 2022-04-08
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In fact, the current control objectives of traction converters for trains are all based on electrical performance, and because the thermal stress of the power module is difficult to simply add to the traditional closed-loop control, the thermal stress of the traction converter is ignored, especially Especially in the application of multi-level traction converters, the thermal stress imbalance problem of each power module in the traction converter is more prominent
This will not only cause waste of resources and increase maintenance costs, but also reduce the overall service life and operational reliability of the traction converter
However, it will be difficult to improve the thermal stress of the entire traction converter by only focusing on the thermal stress improvement / active temperature management technology of a single power device module

Method used

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  • Traction converter thermal field control method and system
  • Traction converter thermal field control method and system
  • Traction converter thermal field control method and system

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Embodiment 1

[0061] In this embodiment, the "traction converter thermal field control method" of the present invention "is also referred to as:" a thermal field uniform distributed traction converter intelligent extension control method ". The follow-up system is in the same way.

[0062] Specifically, the present embodiment refers to a certain permanent magnet train three-level traction converter system, which may be further divided into single-phase three-level rectifier and three-phase three-level inverter, specific topology Such as figure 1 Indicated. This example will be described as an example with the intelligent extension control of the three-phase three-level inverter. The traction three-level inverter system employs a rotational speed-current double closed loop control structure, and the external ring is the rotational speed ring, according to the speed feedback Table, the value of the system electromagnetic torque can be obtained; then, the system DQ axis current is obtained by usin...

Embodiment 2

[0136] In respectively, in accordance with the above method embodiment, the present embodiment provides a hot field uniform distributed traction converter intelligent extension control system, including a memory, processor, and a computer program stored on the memory and can run on the processor. The step of implementing the above method when the processor executes a computer program.

[0137] In summary, the method and system disclosed in the above-described two embodiments, respectively, by intelligently regulating heat generated in the heat devices module in the traction converter, realizing uniform distribution of the heat field of the traction converter. This method is easy to implement, no additional hardware equipment, the extension of the traction converter, and improve the reliability level of the train, reducing equipment maintenance costs.

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Abstract

The invention relates to the technical field of power electronics, and discloses a method for controlling the thermal field of a traction converter to realize uniform distribution of the thermal field of the traction converter. The method includes: constructing a power consumption prediction model corresponding to the system thermal field control quantity of each power module; constructing a thermal field distribution control objective function based on power consumption variance according to the power consumption prediction model corresponding to the system thermal field control quantity, and then calculating The control objective function of the thermal field distribution is combined with the control objective function of each non-thermal field control quantity to construct a performance-based normalized control objective function; according to the normalized control objective function, an initial reward function based on performance normalization is established, And the initial reward function is optimized as a target reward function that dynamically adjusts the thermal weight coefficient according to the feedback value of the outer loop; the system level state combination that maximizes the target reward function value is selected as the system control command output to realize the intelligence of the corresponding power module heat regulation.

Description

Technical field [0001] The present invention relates to the field of power electronics, and more particularly to a heat field control method and system for traction converters. Background technique [0002] With the rapid development of my country's high-speed rail industry, high-speed rail development trend in high-speed running speed, run mumei, etc., has changed to high-speed development, high-speed development, high-speed development, high-speed development, new appeals in high-speed rail development. In particular, high-speed rail safety and reliable operation technology that actively safeguards as the core has become the current trend of current high-speed train technology development. The national "13th Five-Year Plan" key research and development plan advanced rail transit key special items are more preferred for my country's rail transit needs. The direction. [0003] The traction converter is a core device of high-end rail traffic equipment such as a permanent magnet hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/458
CPCH02M5/458
Inventor 杨超彭涛黄啸林阳春华桂卫华谢斐然陶宏伟陈志文樊欣宇
Owner CENT SOUTH UNIV