【摘要】 风电机组的运行工况、器件的老化程度对IGBT的使用寿命具有较大的影响，目前对IGBT进行寿命评估时，大多未考虑风电机组的运行工况与IGBT当前寿命等因素。以风电变流器中的IGBT作为研究对象，对其寿命及可靠性进行评估。根据西北某风电场SCADA系统实测数据，利用Simulink仿真软件搭建风力发电机组模型与瞬态双界面法，获取运行一定年限后的IGBT热阻抗，建立Foster热网络模型；利用Simulink和PLECS软件进行电热联合仿真，计算风电IGBT器件的热损耗，以获得结温信息；利用雨流计数法、寿命预测模型和线性累计损伤模型，得到在当前工况下西北某风电场风电IGBT的损伤度。该方案给出了基于完整运行工况的IGBT寿命评估流程，相较其他IGBT寿命评估方法，考虑因素更全面，预测结果更准确。更多还原

【Abstract】 The operating conditions of the wind turbine and the aging degree of the device have a great influence on the service life of the IGBT.At present, when evaluating the life of the IGBT, most of the factors such as the operating conditions of the wind turbine and the current life of the IGBT are not considered. This paper took IGBT in wind power converter as the research object, and evaluated its life and reliability. According to the measured data of SCADA system of a wind farm in Northwest China, the wind turbine model and transient double interface method were built by Simulink simulation software, and the IGBT thermal impedance after a certain number of years of operation was obtained, and the Foster thermal network model was established. Simulink and PLECS software were used for electrothermal joint simulation to calculated the heat loss of wind power IGBT devices to obtain junction temperature information. Using the rain flow counting method, the life prediction model and the linear cumulative damage model, the damage degree of the wind power IGBT in a wind farm in Northwest China under the current working conditions was obtained. The scheme gave the IGBT life assessment process based on the complete operating conditions. Compared with other IGBT life assessment methods, the factors considered were more comprehensive and the prediction results were more accurate.更多还原