Partial discharge inception of interface voids versus mechanical surface pressure

Hasheminezhad, M.; Ildstad, Erling

doi:10.1109/ichve.2010.5640742

Cited by 5 publications

(7 citation statements)

References 5 publications

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“…The impact of partial discharge on motor windings has been demonstrated in previous works [1,13,6,14,16,17,18]. A summary of these effects and impacts is shown below:…”

Section: Impact Of Pd On Motor Windingsmentioning

confidence: 77%

PD testing of motors for hostile environments

Durham¹,

Azambuja

Feleto

et al. 2015

2015 IEEE Petroleum and Chemical Industry Committee Conference (PCIC)

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The use of electrical motors in hostile environments continues to increase. One example is electrical submersible pumps used for oil and gas production. Additionally, ESPs are being used in wells with increasingly more expensive intervention costs and high productivity. As intervention costs increase, the necessity for longer downhole equipment life also increases. Go/No-Go tests such as hipot, surge test, insulation resistance and winding resistance are good to evaluate the actual (at the factory) condition or integrity of the equipment but they inadequately address longterm aging issues associated with the motor. The use of Partial Discharge testing for hostile environment motors, particularly in factory acceptance tests, may give users and manufacturers additional insight into the quality of construction of the motor and potential life shortening discrepancies in the winding insulation. Additionally, due to the construction of the motors

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“…The impact of partial discharge on motor windings has been demonstrated in previous works [1,13,6,14,16,17,18]. A summary of these effects and impacts is shown below:…”

Section: Impact Of Pd On Motor Windingsmentioning

confidence: 77%

PD testing of motors for hostile environments

Durham¹,

Azambuja

Feleto

et al. 2015

2015 IEEE Petroleum and Chemical Industry Committee Conference (PCIC)

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“…Hasheminezhad [11,[52][53][54][55][56] studied the interfacial breakdown strength of solid-solid interfaces between 2007 and 2011 within the scope of his Ph.D. work. During this time, he investigated the BDS and PD inception field strength of XLPE-XLPE interfaces under a homogeneous AC field by varying the contact pressure (p a ) and surface roughness.…”

Section: Studies On the Insulation Properties Of Polymersmentioning

confidence: 99%

Dielectric Strength of Polymeric Solid–Solid Interfaces under Dry-Mate and Wet-Mate Conditions

Kantar

2021

Energies

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One of the most important causes of insulation system failure is the breakdown of the interface between two solid dielectrics; understanding the mechanisms governing this breakdown phenomenon is therefore critical. To that end, investigating and reviewing the practical limitations of the electrical breakdown strength of solid–solid interfaces present in insulating components is the primary objective of this work. The published literature from experimental and theoretical studies carried out in order to scrutinize the effects of the presence of solid–solid interfaces is investigated and discussed, considering macro, micro, and nano-scale characteristics. The reviewed literature suggests that solid–solid interfaces in accessories have non-uniform distributions of electrical fields within them in comparison to cables, where the distribution is mostly radial and symmetrical. Many agree that the elastic modulus (elasticity), radial/tangential pressure, surface smoothness/roughness, and dielectric strength of the ambient environment are the main parameters determining the tangential AC breakdown strength of solid–solid interfaces.

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“…Several studies in the literature considered the electrical behavior of the solid-solid interface [9], [10]. The effect of contact pressure and surface roughness on the breakdown strength of the interfaces has also been evaluated [2], [5]. The higher interfacial pressure and smoother surfaces lead to higher breakdown strength [1]- [5].…”

Section: Introductionmentioning

confidence: 99%

“…The effect of contact pressure and surface roughness on the breakdown strength of the interfaces has also been evaluated [2], [5]. The higher interfacial pressure and smoother surfaces lead to higher breakdown strength [1]- [5]. There are, however, many fuzzy issues waiting to be answered.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, offshore wind farms necessitate multitude cable connections and all of these connections can either individually route to shore or be terminated to a subsea substation via wet-mateable connectors. Since individual connection reaching to shore is a much expensive solution, termination to a subsea substation via wet-mateable connectors is the preferred method nowadays [1]- [5]. Figure 1 displays a simplified drawing of a high voltage wet-mateable connector [1].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Contact Pressure on Breakdown Strength of Solid-Solid Interfaces

Kantar¹,

Panagiotopoulos²,

Ildstad³

2017

NORD-IS

Self Cite

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Solid-solid interfaces are considered as weak points of the insulation since combination of two solid dielectrics increases the risk of cavities and moisture at the interface against the tangential component of the applied electrical stress. The main objective of this paper is to investigate the impact of the applied contact pressure on shrinkage of the size of cavities on the interface that leads to enhancement in the breakdown strength. Experimental measurements of AC 50 Hz breakdown voltage of solidsolid interfaces assembled under standard laboratory conditions were conducted using two different specimens, namely XLPE and silicon rubber. For the same applied contact pressure, breakdown strength of XLPE-XLPE and silicon rubber-silicon rubber interfaces were also analyzed to yield the influence of elasticity modulus (softness) of the solid material on the effectiveness of the applied pressure. Two different levels of contact pressures were applied for each type of interface and higher interfacial pressure (8.02→11.59 bar) led to improved breakdown strength about 50% for XLPE-XLPE interface whereas the enhancement for the much softer interface (i.e. silicon rubber) was about 7% under increasing pressure (1.34→2.67 bar). Additionally, breakdown strength of silicon rubber interface was found to be higher than that of XLPE interface around 53% at the same applied pressure.

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Partial discharge inception of interface voids versus mechanical surface pressure

Cited by 5 publications

References 5 publications

PD testing of motors for hostile environments

PD testing of motors for hostile environments

Dielectric Strength of Polymeric Solid–Solid Interfaces under Dry-Mate and Wet-Mate Conditions

Impact of Contact Pressure on Breakdown Strength of Solid-Solid Interfaces

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