基于结温监测的风电IGBT热安全性和寿命耗损研究

doi:10.19595/j.cnki.1000-6753.tces.170883

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摘要针对风电变流器中的绝缘栅双极型晶体管（IGBT）模块,研究模块结温实时监测方法及基于结温序列的模块热安全性和寿命耗损的评估方法。建立IGBT模块结温实时监测模型,该模型主要包括计及风速的风机模型和计及环境温度的电热耦合模型。对监测到的IGBT模块实时结温序列进行短时间尺度的特征参数序列提取,进而对模块进行热安全性评估,基于Lesit寿命模型和线性损伤累积理论对模块寿命耗损进行定量研究。结果表明,冬天影响IGBT模块安全性的因素主要是温度波动,夏天影响IGBT模块安全性的因素包括温度波动和高值温度（即某时段温度序列概率最大值对应的温度）,温度差值是造成IGBT损伤的主因之一,风电IGBT模块夏天的寿命耗损远远高于冬天。

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关键词 ：风电变流器, 绝缘栅双极型晶体管, 实时结温, 热安全性, 损伤累积

Abstract：For the insulated gate bipolar transistor (IGBT) modules applied in wind power converters, online monitoring method of junction temperature is studied, thermal safety and lifetime consumption are studied based on junction temperature sequences. Online monitoring model of IGBT module junction temperature was established. The model mainly includes wind turbine model, taking wind speed as an input variable, and the electrothermal coupling model, taking ambient temperature as an input variable. Three characteristic parameters were extracted from a sub-sequence with short time scale in the junction temperature sequences and three characteristic parameter sequences were developed from all the sub-sequences. Then the thermal safety was assessed and the lifetime consumption was quantitatively studied based on the Lesit lifetime model and linear damage accumulation theory. The results show that the main factors affecting IGBT module safety involves temperature fluctuations in winter, temperature fluctuations and high temperature (the temperature corresponds to the maximum probability of a temperature sequence at a certain period) in summer. Temperature difference is one of the main causes of IGBT damage and the lifetime consumption in summer is much higher than that in winter.

Key words： Wind power converters insulated gate bipolar transistor online junction temperature thermal safety damage accumulation

收稿日期: 2017-06-23 出版日期: 2018-05-08

PACS:

TM46

基金资助:国家科技支撑计划（2015BAA09B01）、国家自然科学基金项目（51377044）、河北省自然科学基金重点项目（E2017202284）和河北省教育厅青年基金项目（QN2017316）资助

通讯作者: 胡洋女,1992年生,硕士研究生,研究方向为电器可靠性。E-mail：hbgydxhy@163.com

作者简介: 姚芳女,1972年生,博士,教授,研究方向为电力电子可靠性及其检测技术。E-mail：yaofang@hebut.edu.cn

引用本文:

姚芳, 胡洋, 李铮, 黄凯, 李志刚. 基于结温监测的风电IGBT热安全性和寿命耗损研究[J]. 电工技术学报, 2018, 33(9): 2024-2033. Yao Fang, Hu Yang, Li Zheng, Huang Kai, Li Zhigang. Study on Thermal Safety and Lifetime Consumption of IGBT in Wind Power Converters Based on Junction Temperature Monitoring. Transactions of China Electrotechnical Society, 2018, 33(9): 2024-2033.

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