Results 11 to 20 of about 3,082,243 (295)
Identifying harmonic attributes from online partial discharge data [PDF]
, 2011 Partial discharge (PD) monitoring is a key method of tracking fault progression and degradation of insulation systems. Recent research discovered that the harmonic regime experienced by the plant also affects the PD pattern, questioning the conclusions ...
Rowland, S.M. +4 more
core +4 more sources
Higher-harmonic adaptation and the detection of squarewave gratings [PDF]
, 1987 Adaptation to a high contrast sinewave grating of 1 c/deg spatial frequency causes a large increase in the contrast threshold for a 1 c/deg test grating, but fails to raise the threshold for a squarewave grating of 0.33 c/deg, although the sensitivity of
Magnussen, S. +3 more
core +1 more source
Fast-individual-harmonic-extraction technique [PDF]
, 2005 One outcome of a PhD project (C H Ng, University studentship) A collaborative work (the Energy Systems Group, Northumbria and Durham University). It deals with the problem of harmonic suppression or elimination in power systems for safety and power ...
Busawon, Krishna +3 more
core +1 more source
Optical Gas-Cell Dynamic Adsorption in a Photoacoustic Spectroscopy-Based SOF2 and SO2F2 Gas Sensor
Sensors, 2022 SO2F2 and SOF2 are the main components from the decomposition of insulation gas SF6. Photoacoustic spectroscopy (PAS) has been acknowledged as an accurate sensing technique.
Ying Zhang +3 more
doaj +1 more source
Energies, 2017 Commutation failure is a common fault for line-commutated converters in the inverter. To reduce the possibility of commutation failure, many prediction algorithms based on alternating current (AC) voltage detection have already been implemented in high ...
Xinnian Li +6 more
doaj +1 more source
On detecting harmonic oscillations
Bernoulli, 2015 Published at http://dx.doi.org/10.3150/14-BEJ600 in the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Juditsky, Anatoli, B. +1 more
openaire +5 more sources
Detection of a Missing Harmonic in a Continuous or Pulsed Harmonic Complex [PDF]
The Journal of the Acoustical Society of America, 1972 The masker was a complex of harmonically related sinusolds with the mth harmonic missing. The signal was the mth harmonic and its threshold was determined with the masker either continuously presented or pulsed, i.e., gated simultaneously with the signal.
Neal F. Viemeister, David M. Green
openaire +1 more source
Islanding Detection in Microgrids Using Harmonic Signatures [PDF]
IEEE Transactions on Power Delivery, 2015 In recent years, there has been a growing interest in incorporating microgrids in electrical power networks. This is due to various advantages they present, particularly the possibility of working in either autonomous mode or grid connected, which makes them highly versatile structures for incorporating intermittent generation and energy storage ...
Merino, J. +3 more
openaire +6 more sources
Conditional Anomaly Detection with Soft Harmonic Functions [PDF]
2011 IEEE 11th International Conference on Data Mining, 2011 In this paper, we consider the problem of conditional anomaly detection that aims to identify data instances with an unusual response or a class label. We develop a new non-parametric approach for conditional anomaly detection based on the soft harmonic solution, with which we estimate the confidence of the label to detect anomalous mislabeling.
Michal Valko +4 more
openaire +5 more sources
An Improved Specific Harmonic Detection Method Based on Adaptive Cancellation Principle [PDF]
E3S Web of Conferences, 2021 When the active power filter (APF) and the tunable filter are used for specific harmonic suppression, the accurate single harmonic current detection module is one of the key links to ensure its harmonic suppression effect.
Wang Lei +5 more
doaj +1 more source