摘要:
A system for detecting partial discharge in electrical components may include a control system that may operate a drive in an industrial automation system. The industrial automation system may include the electrical components being analyzed for partial discharge. The system may also include one or more acoustic sensors that may detect one or more acoustic waveforms generated within at least one of the electrical components. The system may also include a monitoring system that may receive the acoustic waveforms from the acoustic sensors and determine whether the one electrical component is experiencing partial discharge based on the acoustic waveforms. The monitoring system may then send a notification to the control system when the one electrical component is determined to be experiencing partial discharge, such that the notification indicates that the one electrical component is experiencing partial discharge.
摘要:
L'invention concerne un dispositif de détection d'un arc électrique à partir d'un signal analogique de sortie (104) d'au moins un capteur d'ondes acoustiques (102), ce dispositif comprenant : un convertisseur analogique-numérique (106) adapté à échantillonner et numériser le signal de sortie (104) du capteur (102) ; un circuit de traitement numérique (110) adapté à mettre en oeuvre une analyse fréquentielle du signal numérique de sortie (108) du convertisseur (106) permettant de détecter la présence éventuelle d'un arc à partir de sa signature acoustique ; et un circuit analogique (118) de détection d'un dépassement d'un seuil de puissance par le signal de sortie (104) du capteur (102), dans lequel le circuit de traitement numérique (110) est configuré pour mettre en oeuvre l'analyse fréquentielle uniquement suite à la détection d'un dépassement du seuil par le circuit analogique (118).
摘要:
Devices and Methods for Arc Fault Detection The present invention is directed towards devices and methods for arc fault detection based on arc sound signals. The de- vice can monitor sound data from a power device by one or more microphones arranged near the power device and extract the characteristic of the sound data. The device can also compare the characteristic of the sound data with the arc fault feature database, and then determine to generate an arc alarm signal. The device is a stand-alone device, which can provide the forecast and early warning of arc faults, and can improve the reliability of arc fault detection.
摘要:
A system for detecting partial discharge in electrical components may include a control system that may operate a drive in an industrial automation system. The industrial automation system may include the electrical components being analyzed for partial discharge. The system may also include one or more acoustic sensors that may detect one or more acoustic waveforms generated within at least one of the electrical components. The system may also include a monitoring system that may receive the acoustic waveforms from the acoustic sensors and determine whether the one electrical component is experiencing partial discharge based on the acoustic waveforms. The monitoring system may then send a notification to the control system when the one electrical component is determined to be experiencing partial discharge, such that the notification indicates that the one electrical component is experiencing partial discharge.
摘要:
An acoustic sensor apparatus includes a housing; a clamp structured to clamp together the housing and an electrical power conductor; an acoustic sensor structured to detect acoustic noise from the electrical power conductor and output a signal; and a circuit structured to detect an electrical conductivity fault from the signal.
摘要:
The invention relates in particular to a system for transmitting at least one electric pulse for an apparatus for determining a distribution of charges contained in the thickness of an element (2) made of a dielectric material, the said transmission system comprising an electrode (1) for transmitting at least one pulse and a generator (3) of the said pulse. The system is noteworthy in that the said electrode consists of a transmission line (1) that is substantially level with respect to the element (2) to be analysed and that comprises impedance-matching means in order to keep the said impedance substantially constant along the said transmission line in the bandwidth of the said pulse.
摘要:
An apparatus (10) for detecting the occurence of partial discharge in electrical equipment, such as high voltage transformers. The apparatus comprises a detecting means including an ultrasonic transducer (11) mounted at one end of an electrically insulating elongate rod (13). The ultrasonic transducer (11) is adapted to detect ultrasonic pulses or waves generated by the occurence of a partial discharge in the electrical equipment. A radio frequency (RF) transducer (17) is also utilised to detect radio frequency (RF) pulses or waves also generated by the partial discharge. The rod (13) can be mounted in the wall of the electrical equipment and so provide a mechanism for adjusting the position of the detecting means within the electrical equipment. The apparatus is also removable from the electrical equipment and re-locatable to other equipment.
摘要:
Erfindungsgemäß werden ein Entladungszeitpunkt (TE) einer elektrischen Entladung (EE) sowie an einem oder mehreren Empfangsorten (EO1, EO2, EO3) ein von der Entladung (EE) verursachter Schallimpuls (SI) erfasst, woraus eine jeweilige Impulslaufzeit (IT(EO)) des Schallimpulses (SI) zum jeweiligen Empfangsort (EO1, EO2, EO3) ermittelt wird. Darüber hinaus wird ein eine Vielzahl von Volumenelementen (VE) umfassendes volumetrisches Modell (VM) der elektrischen Anlage (TR) bereitgestellt, wobei einem jeweiligen Volumenelement (VE) eine ortsaufgelöste Schallgeschwindigkeit (V(VE)) individuell zugeordnet ist. Für einen jeweiligen Empfangsort (EO1, EO2, EO3) wird einem jeweiligen Volumenelement (VE) abhängig von einer zugeordneten Schallgeschwindigkeit (V(VE)) eine volumenelementspezifische Schalllaufzeit (T(VE,EO)) zwischen dem jeweiligen Empfangsort und dem jeweiligen Volumenelement zugeordnet. Weiterhin wird für ein jeweiliges Volumenelement (VE) ein Abstand (D(VE)) der Impulslaufzeiten (IT(EO)) von den diesem Volumenelement (VE) zugeordneten Schalllaufzeiten (T(VE,EO)) ermittelt. Abhängig von den ermittelten Abständen (D(VE)) wird dann ein Volumenelement (SVE) als Position der Entladung (EE) selektiert.