摘要
针对复杂服役环境导致风力发电变流器失效率高的问题,交流工况应力下功率器件加速老化试验方法对提高系统的可靠性具有重要意义。传统恒直流工况应力加速老化试验方法不符合实际服役的风电绝缘栅双极型晶体管(IGBT)器件交流工况应力,导致其可靠性量化结果不准确,难以有效指导变流器设计及运维。因此,研究交流工况应力下IGBT加速老化试验方法对提高系统的可靠性具有重要意义。首先,设计了基于单相全桥逆变器拓扑的交流工况应力功率循环试验平台方案;其次,采用箝位电路提取功率器件导通饱和压降,并计算出结温与热阻;最后,试验证明了加速老化试验方法的有效性。
In view of the high failure rate of wind power converter caused by complex service environment,the accelerated aging test method of power devices under AC condition is of great significance to improve the reliability of the system.The traditional stress-accelerated aging test method under constant DC working conditions does not conform to the AC working conditions stress of wind power insulated gate bipolar transistor(IGBT)devices in actual service,resulting in inaccurate reliability quantification results.It is difficult to guide converter design and operation.Therefore,it is of great significance to study the AC condition accelerated aging test method of power devices.Firstly,an AC condition stress power cycling experimental platform is designed based on single-phase full-bridge inverter topology.Secondly,a clamping circuit is used to extract the on-state voltage drop of power devices,and the thermal resistance and junction temperature are calculated.Finally,the validity of the accelerated experimental method is proved by the test.
作者
李洁
王志
党晓圆
安军鹏
LI Jie;WANG Zhi;DANG Xiao-yuan;AN Jun-peng(Chongqing College of Mobile Communication,Chongqing 401520,China;不详)
出处
《电力电子技术》
CSCD
北大核心
2022年第10期25-28,共4页
Power Electronics
基金
重庆市教育委员会科学技术研究项目(KJQN20-2102404,KJZD-K202002401)
山西省科学技术厅揭榜招标项目(20201101017)
