The Impact of Electrode Material on the Pulsed Breakdown Strength of Water

2005 ◽  
Author(s):  
D. Wetz ◽  
J. Mankowski ◽  
J. Dickens ◽  
M. Kristiansen
Keyword(s):  
Electrode Material ◽  
Breakdown Strength ◽  
The Impact

scholarly journals Electrochemical synthesis of biobased polymers and polymer building blocks from vanillin

RSC Advances ◽  
2021 ◽  
Vol 11 (15) ◽  
pp. 8970-8985
Author(s):  
Robin Kunkel ◽  
Volkmar M. Schmidt ◽  
Carsten Cremers ◽  
Dominik Müller ◽  
Detlef Schmiedl ◽  
...  
Keyword(s):  
Process Parameters ◽  
Current Density ◽  
Electrode Material ◽  
Electrochemical Synthesis ◽  
Building Blocks ◽  
Biobased Polymers ◽  
The Impact

Hydrovanilloin and polyvanillin were synthesized electrochemically investigating the impact of process parameters such as electrode material, charge and current density.

scholarly journals The Impact of TiO2 Nanoparticle Concentration Levels on Impulse Breakdown Performance of Mineral Oil-Based Nanofluids

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 627 ◽  
Author(s):  
Ziyi Wang ◽  
You Zhou ◽  
Wu Lu ◽  
Neng Peng ◽  
Weijie Chen
Keyword(s):  
Tio2 Nanoparticles ◽  
Electric Fields ◽  
Breakdown Voltage ◽  
Concentration Level ◽  
Breakdown Strength ◽  
Mineral Oil ◽  
Interfacial Region ◽  
Bulk Oil ◽  
Lightning Impulse ◽  
The Impact

The insulation of mineral oil-based nanofluids was found to vary with different concentration level of nanoparticles. However, the mechanisms behind this research finding are not well studied. In this paper, mineral oil-based nanofluids were prepared by suspending TiO2 nanoparticles with weight percentages ranging from 0.0057% to 0.0681%. The breakdown voltage and chop time of nanofluids were observed under standard lightning impulse waveform. The experimental results show that the presence of TiO2 nanoparticles increases the breakdown voltage of mineral oil under positive polarity. The enhancement of breakdown strength tends to saturate when the concentration of nanoparticle exceeds 0.0227 wt%. Electronic traps formed at the interfacial region of nanoparticles, which could capture fast electrons in bulk oil and reduce the net density of space charge in front of prebreakdown streamers, are responsible for the breakdown strength enhancement. When the particle concentration level is higher, the overlap of Gouy–Chapman diffusion layers results in the saturation of trap density in nanofluids. Consequently, the breakdown strength of nanofluids is saturated. Under negative polarity, the electrons are likely to be scattered by the nanoparticles on the way towards the anode, resulting in enhanced electric fields near the streamer tip and the decrement of breakdown voltage.

The impact of surface conditioning and area on the pulsed breakdown strength of water

2005 ◽  
Vol 33 (4) ◽  
pp. 1161-1169 ◽  
Author(s):  
D.A. Wetz ◽  
K.P. Truman ◽  
J.J. Mankowski ◽  
M. Kristiansen
Keyword(s):  
Breakdown Strength ◽  
Surface Conditioning ◽  
The Impact

scholarly journals Dampak Korona pada SUTET 500 kV Terhadap Radio Interference

2019 ◽  
Vol 11 (2) ◽  
pp. 87-97
Author(s):  
Christine Widyastuti ◽  
I Nyoman Bagus Yudha Dharma
Keyword(s):  
Breakdown Strength ◽  
Radio Interference ◽  
Radio Waves ◽  
Free Electrons ◽  
Surrounding Environment ◽  
Ieee Standard ◽  
Extra High Voltage ◽  
The Impact ◽  
Double Channel ◽  
Corona Losses

Corona can occur in SUTET because SUTET carries a high enough electric current and voltage, this causes excessive electrical pressure that is not proportional to the breakdown strength of the air around the conductor so that there will be a phenomenon where the electric field will collide with free electrons in the air and will form ionisations in the form of new ions and electrons. This process will continue as long as there are currents and voltages on the extra-high-voltage network. This certainly will affect the surrounding environment through which SUTET is included, among others, interference with radio waves (Radio Interference). The addition of the number of sub conductors is considered more effective in reducing corona losses and radio interference in each wicket than increasing the distance of the conductor to the ground. The impact of corona on a 500 kV double-channel SUTET on radio interference in the Greater Jakarta area is still within reasonable limits because it is still below the IEEE standard of 40 dB.  

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