Leakage Current Monitoring of Suspension Insulator for Effective Determination of ESDD

2019 ◽  
Author(s):  
Jagriti Dey ◽  
Saurabh Dutta ◽  
Arijit Baral ◽  
Sivaji Chakravorti
Keyword(s):  
Leakage Current ◽  
Suspension Insulator ◽  
Current Monitoring

Research on Compressed Sensing Matrix Based on Data Compressing of Insulator Leakage Current

2013 ◽  
Vol 475-476 ◽  
pp. 451-454
Author(s):  
Xue Ming Zhai ◽  
Xiao Bo You ◽  
Ruo Chen Li ◽  
Yu Jia Zhai ◽  
De Wen Wang
Keyword(s):  
Compressed Sensing ◽  
Data Compression ◽  
Leakage Current ◽  
Sparse Matrix ◽  
Circulant Matrix ◽  
Measurement Matrix ◽  
Sensing Matrix ◽  
Significant Step ◽  
On Line

Insulator fault may lead to the accident of power network,thus the on-line monitoring of insulator is very significant. Low rates wireless network is used for data transmission of leakage current. Making data compression and reconstruction of leakage current with the compressed sensing theory can achieve pretty good results. Determination of measurement matrix is the significant step for realizing the compressed sensing theory. This paper compares multiple measurement matrix of their effect via experiments, putting forward to make data compression and reconstruction of leakage current using Toeplitz matrix, circulant matrix and sparse matrix as measurement matrix, of which the reconstitution effect is almost the same as classical measurement matrix and depletes computational complexity and workload.

scholarly journals Insulator string leakage current-monitoring sensor based on fiber Bragg grating

2018 ◽  
Vol 26 (19) ◽  
pp. 24940 ◽  
Author(s):  
Zhehao Yan ◽  
Zhiguo Zhang ◽  
Luming Li ◽  
Tong Zhai ◽  
Renzhong Guo ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Leakage Current ◽  
Bragg Grating ◽  
Current Monitoring

Leakage Current Monitoring for Electrical Loads Based on Internet of Things

2021 ◽  
Author(s):  
Riky Tri Yunardi ◽  
Erwin Sutanto ◽  
Aji Akbar Firdaus ◽  
Elsyea Adia Tunggadewi ◽  
Hammam Abror Ali ◽  
...  
Keyword(s):  
Internet Of Things ◽  
Leakage Current ◽  
Electrical Loads ◽  
Current Monitoring

Leakage current monitoring and outdoor degradation of silicone rubber

2001 ◽  
Vol 8 (6) ◽  
pp. 1108-1115 ◽  
Author(s):  
Jeong-Ho Kim ◽  
Woo-Chang Song ◽  
Jae-Hyung Lee ◽  
Yong-Kwan Park ◽  
Han-Goo Cho ◽  
...  
Keyword(s):  
Leakage Current ◽  
Silicone Rubber ◽  
Current Monitoring

Long term accelerated aging investigation of an epoxy/silica nanocomposite for high voltage insulation

2018 ◽  
Vol 38 (3) ◽  
pp. 263-269 ◽  
Author(s):  
Abraiz Khattak ◽  
Muhammad Amin ◽  
Muhammad Iqbal
Keyword(s):  
Leakage Current ◽  
Accelerated Aging ◽  
Sem Analysis ◽  
Epoxy Nanocomposite ◽  
Aging Period ◽  
High Voltage Insulation ◽  
Micro Level ◽  
Silica Nanocomposite ◽  
Current Monitoring

AbstractAn epoxy/silica nanocomposite loading was subjected to a multistress environment along with neat epoxy (NEP) in a specially fabricated chamber at 2.5 kV for 9000 h. For aging investigation of the samples, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), leakage current monitoring and Swedish Transmission Research Institute hydrophobicity classification were used with constant visual inspection. Both samples were found to be adequate and suitable for insulation at the end of the aging period. However, the epoxy nanocomposite (EPNC) performed better in comparison to NEP. FTIR spectrographs showed that a reduction in important hydrocarbon groups was less in the EPNC. The leakage current was higher in the case of the neat sample and accompanied by a higher loss of hydrophobicity. Similarly, in the nanocomposite, no significant change in surface topography at micro level was recorded from the SEM analysis.

Substituent position influence on the electrochemical properties and antioxidant activity of tetra(aminophenyl)porphyrins

2014 ◽  
Vol 18 (07) ◽  
pp. 585-593 ◽  
Author(s):  
Sergey M. Kuzmin ◽  
Svetlana A. Chulovskaya ◽  
Vladimir I. Parfenyuk
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Properties ◽  
Binding Constants ◽  
Low Molecular Weight ◽  
Oxygen Species ◽  
Group Position ◽  
Physiological Processes ◽  
Important Intermediate ◽  
Current Monitoring

Free radicals and reactive oxygen species (ROS) are important intermediate products in physiological processes. In the healthy cell, they are generated and regulated by enzymes and low molecular weight antioxidants. Overproduction of ROS leads to a large list of diseases, so the determination of antioxidant activity of perspective natural and synthetic compounds is necessary for drugs development. In this paper cyclic voltammetry (CV) method was applied to the electrochemical and superoxide scavenging properties of 5,10,15,20-tetrakis(4′-aminophenyl)porphyrin ( H 2 T (p- NH 2 Ph ) P ) and 5,10,15,20-tetrakis(3′-aminophenyl)porphyrin ( H 2 T (m- NH 2 Ph ) P ) investigation. It is shown that the studied porphyrins have very similar electrochemical behavior and slight effect on the quantity of superoxide produced during first CV cycle therefore the estimation of superoxide scavenging properties may be performed by the [Formula: see text] oxidation peak current monitoring. The antioxidant properties of porphyrins were estimated in terms of binding constants. The strong effect of NH 2 group position on the superoxide scavenging activity are shown: the H 2 T (p- NH 2 Ph ) P (kb = 12.7 × 102 mol-1) demonstrates the significant superoxide scavenging activities whereas H 2 T (m- NH 2 Ph ) P (kb = 0.83 × 102 mol-1) — negligible. The most probable mechanism of superoxide scavenges explaining the observed differences are the H -atoms transfer due to N – H bond breaking in the aminophenyl substituent.

Sign in / Sign up

Export Citation Format

Share Document