基于阵列波导光栅的IGBT功率模块结温监测  

Junction Temperature Monitoring of IGBT Power Module Based on Array Waveguide Grating

作　　者：高礼玉 栾洪洲 李天琦 黄欣欣 张锦龙[1] Gao Liyu;Luan Hongzhou;Li Tianqi;Huang Xinxin;Zhang Jinlong(School of Physics and Electronics Henan University,Kaifeng 475001 China;China EPRI Electric Power Engineering Co.Ltd,Beijing 102200 China)

机构地区：[1]河南大学物理与电子学院,开封475001 [2]中电普瑞电力工程有限公司,北京102200

出　　处：《电工技术学报》2025年第6期1796-1804,共9页Transactions of China Electrotechnical Society

基　　金：国家电网有限公司总部管理科技项目“复杂电磁环境下基于硅光子感知芯片的换流阀多元监测关键技术研究”(5500-2024-40170A-1-1-ZN)资助。

摘　　要：高压、大功率型绝缘栅双极型晶体管(IGBT)是柔性直流输电网实现电能转换的核心组件,而高温是导致工程中IGBT模块的实际运行寿命远低于设计指标的最主要原因,因此实时监测IGBT模块内部温度是提高IGBT模块寿命、保证电网柔性直流输电正常运行的重要手段。该文提出一种基于阵列波导光栅(AWG)的IGBT温度监测系统,首先进行IGBT模块热仿真,根据仿真结果得到的IGBT模块运行时的温度分布规律来探究传感器部署位置。其次利用AWG通道的波分特性对传感器反射波长进行解调,多通道、高精度的AWG解调可以大幅度降低IGBT结温监测成本,提高系统精度,利用波导布拉格光栅(WBG)传感器反射波长与被测芯片表面之间的温度关系推导出芯片的结温信息。最后通过对照实验验证了系统的可靠性。实验数据表明,该结温在线监测方法能准确获取IGBT内部芯片的动态结温,且温度动态波动幅度小于0.6%。High-voltage,high-power insulated gate bipolar transistors(IGBTs)are the key components for power conversion in flexible DC transmission networks.High temperature is the main reason for IGBT modules’efficacy being lost in engineering.Therefore,real-time monitoring of the internal temperature of IGBT modules is crucial.This paper proposes an IGBT temperature monitoring system based on arrayed waveguide grating(AWG)and waveguide grating(WBG)to precisely monitor the real-time temperature of IGBT modules in the converter valve.Optical sensing technology is used to monitor the junction temperature of IGBTs by mounting sensors directly on the internal chip of IGBT modules.Thermal simulation of IGBT modules is conducted to investigate the positioning of sensors based on the temperature distribution during module operation.Then,WBG sensors are fixed on the measured chip based on the packaging method of IGBT modules.A testing platform for IGBT module operation is set up.The sensor network is simplified through wavelength division multiplexing characteristics of AWG for optical grating reflection wavelength demodulation.Using the relationship between the reflected wavelength of WBG and the surface temperature of the measured chip,the junction temperature information of the chip is derived.Finally,the accuracy of the system is verified by directly measuring the optical spectrum of the grating using a demodulator.The temperature difference between the IGBT chip and the diode chip is about 4.3℃when the applied voltage is 800 V under different operating conditions.Even considering the effects of water cooling fluctuations and air cooling,the highest temperature of the IGBT chip obtained by the monitoring system is very close to the simulated temperature.For every 250 V increase in operating voltage,the operating temperature of the IGBT chip and diode chip obtained by the monitoring system increases by about 2℃,which aligns with experimental expectations.The temperature data obtained by the AWG demodulation and the demodu

关 键 词：IGBT模块 结温监测 波导布拉格光栅 阵列波导光栅 

分 类 号：TM751.1[电气工程—电力系统及自动化] TN322.8[电子电信—物理电子学]