电工技术学报2017，Vol.32Issue(13)：88-99,12.DOI:10.19595/j.cnki.1000-6753.tces.151590
考虑机侧变流器复杂热载荷特性的寿命评估
Life Estimation of Generator Side Converter Consideringthe Comprehensive Mission Profiles
摘要
Abstract
The insulated gated bipolar transistor (IGBT) suffers from complicated power loadings and is one of the weakest components in wind system. At present, researches mainly focus on a selected and tough operation environment in very short term or steady cases, taking no consideration on the long term variations of wind speed and ambient temperature. Therefore, a more detailed life consumption assessment model was built to evaluate the lifetime. Meanwhile, a wind energy conversion system was regarded as a case study. The characteristics of life consumptions under different time constant thermal loadings were discussed, as well as the relationship between wind speed probability density and life consumption. Furthermore, the influence of ambient temperature simplified methods on lifetime assessment was discussed. The experimental results indicate that the lifetime consumption caused by low frequency thermal loadings is dominant, which contributes to more than 64.42% of the whole lifetime. Variation of wind speed probability and fundamental frequency life consumption areserious unsymmetrical. More than 60% of life is consumed in high wind speed, which is with small probability density. Whereas different ambient temperature equivalent methods have great influence on different time constants thermal loadings. The ambient temperature fluctuation has little effects on fundamental frequency life consumption, which may induce a decreasing of 12.26% for low frequency lifetime calculation.关键词
机侧变流器/热载荷/寿命消耗/气温波动Key words
Generator side converter/thermal loading/life consumption/temperature fluctuation分类
信息技术与安全科学引用本文复制引用
高兵,陈民铀,杨帆,邵伟华,伏进..考虑机侧变流器复杂热载荷特性的寿命评估[J].电工技术学报,2017,32(13):88-99,12.基金项目
国家重点基础研究发展计划(973计划)(2012CB25200),国家自然科学基金(51477019)和中央高校基本科研业务费(106112015CDJXY150004)资助项目. （973计划）
