Acoustic array sensor device for partial discharge detection is widely used in power equipment inspection with the advantages of non-contact and precise positioning compared with partial discharge detection methods su...Acoustic array sensor device for partial discharge detection is widely used in power equipment inspection with the advantages of non-contact and precise positioning compared with partial discharge detection methods such as ultrasonic method and pulse current method.However,due to the sensitivity of the acoustic array sensor and the influence of the equipment operation site interference,the acoustic array sensor device for partial discharge type diagnosis by phase resolved partial discharge(PRPD)map might occasionally presents incorrect results,thus affecting the power equipment operation and maintenance strategy.The acoustic array sensor detection device for power equipment developed in this paper applies the array design model of equal-area multi-arm spiral with machine learning fast fourier transform clean(FFT-CLEAN)sound source localization identification algorithm to avoid the interference factors in the noise acquisition system using a single microphone and conventional beam forming algorithm,improves the spatial resolution of the acoustic array sensor device,and proposes an acoustic array sensor device based on the acoustic spectrogram.The analysis and diagnosis method of discharge type of acoustic array sensor device can effectively reduce the system misjudgment caused by factors such as the resolution of the acoustic imaging device and the time domain pulse of the digital signal,and reduce the false alarm rate of the acoustic array sensor device.The proposed method is tested by selecting power cables as the object,and its effectiveness is proved by laboratory verification and field verification.展开更多
皮带运输机在煤矿生产中一直承担着煤炭运输的重要任务,其安全稳定运行是保障煤矿安全生产的前提。但是,皮带运输机在实际使用过程中会发生各种各样的故障,严重时会造成皮带断裂进而导致设备停转,给煤矿生产带来很大损失。因此,对发生...皮带运输机在煤矿生产中一直承担着煤炭运输的重要任务,其安全稳定运行是保障煤矿安全生产的前提。但是,皮带运输机在实际使用过程中会发生各种各样的故障,严重时会造成皮带断裂进而导致设备停转,给煤矿生产带来很大损失。因此,对发生断带事故的原因进行分析,探讨断带保护技术应用及安防装置设计。根据分析结论和实际情况,设计了皮带运输机断带安防装置,提出了一种基于ARM的PLC+DCS+GSM (Programmable Logic Controller+Distributed Control System+Global System for Mobile Communications,可编程逻辑控制器+分散控制系统+全球移动通信系统)综合安防系统设计方案,并对该系统进行了可行性分析。展开更多
基金This work was supported by the science and technology project of State Grid Shanghai Municipal Electric Power Company(No.52090020007F)National Key R&D Program of China(2017YFB0902800).
文摘Acoustic array sensor device for partial discharge detection is widely used in power equipment inspection with the advantages of non-contact and precise positioning compared with partial discharge detection methods such as ultrasonic method and pulse current method.However,due to the sensitivity of the acoustic array sensor and the influence of the equipment operation site interference,the acoustic array sensor device for partial discharge type diagnosis by phase resolved partial discharge(PRPD)map might occasionally presents incorrect results,thus affecting the power equipment operation and maintenance strategy.The acoustic array sensor detection device for power equipment developed in this paper applies the array design model of equal-area multi-arm spiral with machine learning fast fourier transform clean(FFT-CLEAN)sound source localization identification algorithm to avoid the interference factors in the noise acquisition system using a single microphone and conventional beam forming algorithm,improves the spatial resolution of the acoustic array sensor device,and proposes an acoustic array sensor device based on the acoustic spectrogram.The analysis and diagnosis method of discharge type of acoustic array sensor device can effectively reduce the system misjudgment caused by factors such as the resolution of the acoustic imaging device and the time domain pulse of the digital signal,and reduce the false alarm rate of the acoustic array sensor device.The proposed method is tested by selecting power cables as the object,and its effectiveness is proved by laboratory verification and field verification.
文摘皮带运输机在煤矿生产中一直承担着煤炭运输的重要任务,其安全稳定运行是保障煤矿安全生产的前提。但是,皮带运输机在实际使用过程中会发生各种各样的故障,严重时会造成皮带断裂进而导致设备停转,给煤矿生产带来很大损失。因此,对发生断带事故的原因进行分析,探讨断带保护技术应用及安防装置设计。根据分析结论和实际情况,设计了皮带运输机断带安防装置,提出了一种基于ARM的PLC+DCS+GSM (Programmable Logic Controller+Distributed Control System+Global System for Mobile Communications,可编程逻辑控制器+分散控制系统+全球移动通信系统)综合安防系统设计方案,并对该系统进行了可行性分析。
