Vehicle-mounted overhead line system insulator partial discharge state detection system and method

The invention discloses a vehicle-mounted overhead line system insulator partial discharge state detection system and method. The sound wave detection module is installed on a train roof and collects sound wave signals in the train advancing process. The data processing module is installed in the train to carry out primary filtering and secondary filtering on the sound wave signals after preliminary filtering, the primary filtering filters out-of-band signals through frequency, and the secondary filtering filters other noise in the frequency band; carrying out discharge severity evaluation on the signal after secondary filtering; the positioning module is installed at the bottom of the train and used for obtaining positioning data. The insulator discharge state can be detected on line, the detection efficiency and accuracy are high, and detection is comprehensive. 本发明公开了一种车载接触网绝缘子局部放电状态检测系统和方法。声波检测模块安装于列车车顶在列车行进过程中采集声波信号；数据处理模块安装于列车内部对初步滤波后的声波信号进行一次滤波和二次滤波，一次滤波通过频率过滤带外信号，二次滤波过滤频段内的其他噪声；对二次滤波后的信号进行放电严重程度评估；定位模