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Thermal Modeling and Online Condition Monitoring for the Air Cooling System of Power Converters for Urban Rail Transit
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Qian ZHOU1, Yanhui GUO1, Yuan LIANG2, Hao JIA2, Jie CHEN2
Urban Rapid Rail Transit | 2025, 38(2) : 133 - 139
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Urban Rapid Rail Transit | 2025, 38(2): 133-139
• Electrical and Mechanical Engineering •
Thermal Modeling and Online Condition Monitoring for the Air Cooling System of Power Converters for Urban Rail Transit
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Qian ZHOU1, Yanhui GUO1, Yuan LIANG2, Hao JIA2, Jie CHEN2
Affiliations
  • 1 Beijing Metro Operation Co., Ltd. Beijing 100044
  • 2 School of Electrical Engineering Beijing Jiaotong University Beijing 100044
Published: 2025-04-01 doi: 10.3969/j.issn.1672-6073.2025.02.019
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During longterm operation, the cooling system's heatsink intake can become clogged with environmental impurities and dust, reducing cooling airflow and affecting thermal dissipation efficiency. This can lead to overheating faults in the power converter, significantly reducing its operational reliability. To address the issue of dust blockage in the aircooled system, which can cause overheating faults in rail transit power converters, a realtime online monitoring method for the cooling system's thermal dissipation state is proposed. This method uses the thermal resistance of the heatsink, extracted from the power device and heatsink cooling curves, as a characteristic parameter. The GaussNewton iterative method is employed to extract these parameters, which are used to identify the degree of blockage and achieve online monitoring of the cooling system's thermal dissipation state. Simulation and experimental results validate that the proposed method effectively monitors the cooling system's operational state, demonstrating superior detection efficiency and effectiveness compared to traditional blockage detection methods.

urban rail transit  /  converter  /  cooling system  /  thermal dissipation state  /  thermal modeling  /  online monitoring
Qian ZHOU, Yanhui GUO, Yuan LIANG, Hao JIA, Jie CHEN. Thermal Modeling and Online Condition Monitoring for the Air Cooling System of Power Converters for Urban Rail Transit[J]. Urban Rapid Rail Transit, 2025 , 38 (2) : 133 -139 . DOI: 10.3969/j.issn.1672-6073.2025.02.019
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Year 2025 volume 38 Issue 2
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Article Info
doi: 10.3969/j.issn.1672-6073.2025.02.019
  • Receive Date：2024-03-28
  • Online Date：2025-07-09
  • Published：2025-04-01
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  • Received：2024-03-28
  • Revised：2024-08-28
Funding
Affiliations
    1 Beijing Metro Operation Co., Ltd. Beijing 100044
    2 School of Electrical Engineering Beijing Jiaotong University Beijing 100044
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