长时间尺度下功率模块可靠性评价模型-电测与仪表.doc

考虑不同时间尺度的风电变流器功率模块 可靠性评估模型 季海婷1，，，（1. 重庆三峡学院 信号与信息处理重点实验室，；. 重庆大学 输配电装备及系统安全与新技术国家重点实验室，重庆 400044；3. 国网重庆市电力公司万州供电分公司，重庆 404000） 摘要：FIDES可靠性评估导则，引入热应力因子和温度循环因子对不同风速均值、风速湍流强度运行状态下的可靠性影响进行评估。针对由换流引起的短时间尺度下的基频结温波动，采用多状态概率评估思想将风速大小进行概率划分，并基于功率模块失效机理评估不同风速对功率模块故障率 关键词： 中图分类号：TM 文献标识码：B 文章编号：1001-1390（201）00-0000-00 Multi-time scales reliability evaluation model of power modules in wind power converter i Haiting1, Li Hui2, Wu Jianmei3, Li Chuan3 (1. Key Laboratory of Signal and Information Processing, Chongqing Three Gorges University, Chongqing, 404000, China. 2. The State Key Laboratory of Equipment and System Safety of Power Transmission and Distribution New Technology, Chongqing University, Chongqing 400044, China. 3. Wanzhou Power Supply Bureau of Chongqing Electric Power Corporation, Chongqing 404000, China) Abstract：Under variable wind spee operation, the power modules of wind power converters suffered different time-scales of junction temperature variations; the long-term junction temperature variation caused by series changed wind speed time, as well as the short-term fundamental frequency junction temperature variation caused by working commutation. In order to generally estimate the reliability effect of long-term and short-term junction temperature, a multi-time scales reliability evaluation model has been developed in this paper. As with long-term junction temperature variation, thermal factor and thermal cycling factors have been introduced based on FIDES guide and the effect of wind speed and wind turbulence have been evaluated. As with short-term junction temperature variation, multi-states evaluation philosophy has been adopted, and the wind speed distribution has been allotted to address the different effects to power module reliability. Finally, taking a real field wind power converter as example, the reliability has been assessed and the effects of design parameters have been analyzed. The achievement of the research would pro