基于超声波传感器的发电机局部放电检测  

Partial discharge detection of generator based on ultrasonic sensor

作　　者：杨永明[1] 王远[1] 陈学军[1] 张宇鹏[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点试验室,重庆400030

出　　处：《传感器与微系统》2010年第8期132-134,144,共4页Transducer and Microsystem Technologies

基　　金：国家重点实验室基金资助项目(2007DA10512709206)

摘　　要：针对传统的离线实验方法不能完全反映发电机运行真实状态,提出了采用超声波检测法来监测发电机定子绕组局部放电的方法。根据对实验获取的局部放电超声信号的分析,设计了发电机局部放电超声检测系统。利用该系统对模拟局部放电信号产生的超声波在发电机定子中的传播情况和发电机定子绕组的局部放电超声信号进行了检测,并对不同位置的放电源的检测结果进行了分析对比。实验结果表明:利用超声波检测发电机定子绕组局部放电是可行的,设计的检测系统具有较高的灵敏度和稳定性。A new detection method using ultrasonic sensor to detect generator stator windings partial discharge （PD） is proposed, aimed at the problem of traditional off-line test methods can not fully reflect the real generator operating status. According to analysis on the PD ultrasonic signals, the generator PD ultrasonic detection system was designed. The spread characteristics of PD ultrasonic signal from PD model in the generator and PD ultrasonic signal in generator were detected by using the system. The detection results of the different position of discharge sources in generator were analyzed and compared. Experimental results show that the proposed detection system is feasible and it has advantage of high sensitivity and stability.

关 键 词：超声波传感器 局部放电 发电机 定子绕组 超声信号分析 

分 类 号：TM85[电气工程—高电压与绝缘技术]