| 引用本文: | 李 辉,秦 星,刘盛权,杨 东,杨 超,胡姚刚,冉 立,唐显虎.双馈风电变流器IGBT模块功率循环能力评估[J].电力自动化设备,2015,35(1): |
| LI Hui,QIN Xing,LIU Shengquan,YANG Dong,YANG Chao,HU Yaogang,RAN Li,TANG Xianhu.Assessment of power cycling capability for converter IGBT module of DFIG system[J].Electric Power Automation Equipment,2015,35(1): |
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| 摘要: |
| 为准确评估不同风况下双馈风电机组变流器的可靠性水平，提出一种机侧变流器IGBT模块的功率循环能力评估方法，并研究了风速对功率循环能力的影响。基于器件失效模型，建立机侧变流器IGBT模块的平均失效时间（MTTF）计算模型。结合变流器实时运行参数，建立机侧变流器IGBT模块结温计算模型，并分析湍流风速对结温波动的影响，进而提出基于雨流算法提取随机结温波动信息。根据提取的随机结温波动信息，结合风速统计特性，提出机侧变流器IGBT模块功率循环能力评估模型。最后，以某1.5 MW双馈风电机组机侧变流器IGBT模块为例，分析年平均风速及湍流强度对其功率循环能力的影响。分析结果表明：该变流器IGBT模块的MTTF其随着年平均风速及湍流强度的增大而减小；相比传统评估模型，所建立的评估模型更准确。 |
| 关键词: 双馈风电机组 风电 变流器 IGBT；功率循环能力；结温；湍流风速；可靠性；评估 |
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| 基金项目:基金项目：国家自然科学基金资助项目（51377184）；中央高校基本科研业务费专项资金资助项目（CDJZR12150074）；国家国际科技合作专项资助项目（2013DFG61520）；重庆市集成示范计划项目（CSTC2013JCSF70003） |
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| Assessment of power cycling capability for converter IGBT module of DFIG system |
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LI Hui1, QIN Xing1, LIU Shengquan1, YANG Dong1, YANG Chao1, HU Yaogang1, RAN Li1, TANG Xianhu2
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1.State Key Laboratory of Power Transmission Equipment & System Security and New Technology，Chongqing University，Chongqing 400044，China;2.Chongqing KK-QIANWEI Wind Power Equipment Co.，Ltd.，Chongqing 401121，China
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| Abstract: |
| The effect of wind speed on power cycling capability is investigated and a method of power cycling capability assessment is proposed to accurately evaluate the reliability level of the GCIM（Generator-side Ｃonverter IGBT Ｍodules） in different wind conditions for DFIG（Doubly Fed Induction Generator） system. A calculation model based on the device failure model is built to calculate the MTTF（Mean Time To Failure） of GCIM. Combined with the real-time operating parameters of converter，a calculation model is built to calculate its junction temperature. The effect of turbulent wind on the junction temperature fluctuation is analyzed and the rain-flow algorithm is adopted to extract the information of random junction temperature fluctuation，based on which and combined with the statistic characteristics of wind speed，a model of power cycling capability assessment is proposed for GCIM. With the GCIM of a 1.5 MW DFIG unit as an example，the effect of the annual average wind speed and turbulence intensity on the power cycling capability is analyzed，and the analytical results show that，the MTTF of GCIM decreases along with the increase of annual average wind speed and turbulence intensity；compared to the traditional assessment models，the proposed model is more accurate. |
| Key words: doubly fed wind turbine generator system wind power electric converters Insulated Gate Bipolar Transistors（IGBT） power cycling capability junction temperature turbulent wind speed reliability assessment |
