电工技术学报  2015, Vol. 30 Issue (21): 31-38    DOI:
电力电子及电力传动 |
功率器件集总参数热路模型及其参数提取研究
万萌,应展烽,张旭东,吴军基,杨忠浩
南京理工大学能源与动力工程学院 南京 210094
Research on the Lumped Parameter Thermal Circuit Model and the Parameter Extraction Method of Power Devices
Wan Meng,Ying Zhanfeng,Zhang Xudong,Wu Junji,Yang Zhonghao
School of Energy and Power Engineering Nanjing University of Science and Technology Nanjing 210094 China
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摘要 为准确计算功率器件运行温度,在热平衡原理和热电类比理论基础上,提出功率器件集总参数热路模型。为实现模型等效热路参数的提取,设计相关温升实验平台,并基于遗传算法对热路模型进行辨识。研究结果表明,辨识方法能够有效克服功率器件等效热路参数难以确定的问题,揭示模型参数随电流等级及散热器规格变化的规律。在获得模型参数变化规律后,即便未知功率器件的实验温升曲线,所提模型也可准确计算器件温升的动态过程,克服传感器直接测温所带来的弊端,尤其适合在传感器固定困难及测量精度易漂移的场合应用。
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万萌
应展烽
张旭东
吴军基
杨忠浩
关键词 集总参数热路模型热平衡原理热电类比遗传算法参数辨识    
Abstract:In this paper,a lumped parameter thermal circuit model is proposed considering the thermal equilibrium principle and the thermal-electrical analogy theory to calculate the operation temperature of power devices with high accuracy.In order to extract equivalent thermal parameters of the proposed model,an experimental platform is designed for measuring the temperature of power devices and the genetic algorithm is employed for thermal circuit model identification.The result shows that the thermal parameters in the lumped thermal circuit model can be identified effectively with the proposed method and the variation law of the thermal parameters with current level and heat sink area can be clearly revealed.Under the condition of known variation law of the parameters,the proposed model can reflect the thermal dynamic process of power devices with high accuracy without obtaining relevant temperature rise profile from experiments.As a consequence,the proposed model is particularly suitable for applying in the occasion where the temperature sensor is difficult to fix and the precision of sensor is prone to drift.
Key wordsLumped parameter    thermal circuit model    thermal equilibrium principle    thermal-electrical analogy    genetic algorithm    parameter identification   
收稿日期: 2014-12-03      出版日期: 2015-11-12
PACS: TM315  
基金资助:国家自然科学基金(51405235)、南京理工大学研究生教育创新计划项目、江苏省产学研联合创新研究项目(BY2013038)和江苏省电力公司创新科技项目(2011LY226090425)资助。
通讯作者: 应展烽 男,1982年生,讲师,博士,研究方向为电气设备热电耦合计算,电力系统状态监测技术,电力系统分析。   
作者简介: 万萌 女,1989年生,博士研究生,研究方向为电气设备热电耦合计算。
引用本文:   
万萌,应展烽,张旭东,吴军基,杨忠浩. 功率器件集总参数热路模型及其参数提取研究[J]. 电工技术学报, 2015, 30(21): 31-38. Wan Meng,Ying Zhanfeng,Zhang Xudong,Wu Junji,Yang Zhonghao. Research on the Lumped Parameter Thermal Circuit Model and the Parameter Extraction Method of Power Devices. Transactions of China Electrotechnical Society, 2015, 30(21): 31-38.
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