摘要
大型变电站GIS设备中多个分隔部件都容易产生异响,而变电站通常在高压、高温、高湿等恶劣环境下运行,难以进入高压区域获取设备的全局数据,使得诊断设备异响存在误差。为此,提出基于声成像技术的大型变电站GIS设备异响诊断研究。采用由专用的麦克风阵列、声信号采集模块、去噪与增强模块、声场成像模块、视频叠加与声学定位模块组成的声成像技术采集大型变电站GIS设备的声源数据,并以奈奎斯特采样定理为基础,对声成像技术执行阶段麦克风阵列中单元间距细化设计,以获取设备的全局数据;在异响声源定位阶段,引入DAMAS,改进波束形成处理方法,并将聚焦输出最大值对应的位置作为诊断结果,获取变电站GIS设备异响的声源位置,实现异响诊断。在测试结果中,设计方法对异响位置的诊断精度呈现出随着异响声源强度的增加逐渐提高的发展趋势,具体误差在3.0 cm以内。
A study on abnormal sound diagnosis of GIS equipment in large substation based on acoustic imaging technology is proposed in this paper.Acoustic imaging technology composed of dedicated microphone array,acoustic signal acquisition module,de-noising and enhancing module,sound field imaging module,video superposition and acoustic positioning module is adopted to collect sound source data of GIS equipment in large substation.Based on Nyquist sampling theorem,unit spacing of microphone array in the execution stage of acoustic imaging technology is designed.To obtain the global data of the device.In the stage of abnormal sound source location,DAMAS is introduced to improve the beamforming processing method,and the position corresponding to the maximum focus output is taken as the diagnostic result to obtain the location of the abnormal sound source of the GIS equipment in the substation and realize the abnormal sound diagnosis.In the test results,the diagnosis results of the location of the abnormal sound by the design method show a trend of gradual improvement with the increase of the intensity of the abnormal sound source,and the specific error was less than 3.0 cm.
出处
《工业控制计算机》
2025年第3期120-122,共3页
Industrial Control Computer
基金
广西电网有限责任公司应用研究类科技项目(GXKJXM20230103)。
关键词
声成像技术
大型变电站
GIS设备
异响诊断
acoustic imaging technology
large substation
GIS equipment
abnormal sound diagnosis
