The 1984 J. B. Whitehead Memorial Lecture the Physics of Partial Discharges in Solid Dielectrics

Devins, J. C.

doi:10.1109/tei.1984.298770

Cited by 134 publications

(24 citation statements)

References 7 publications

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“…A good discussion on these aspects is provided in [13][14][15]. Some aspects relevant in supporting our observations are discussed here.…”

Section: Background On Partial Discharges In Insulation Systemsmentioning

confidence: 74%

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Impact of DC Voltage Enhancement on Partial Discharges in Medium Voltage Cables - An Empirical Study with Defects at Semicon-Dielectric Interface

Shekhar¹,

Feng²,

Gattozzi³

et al. 2017

Preprint

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Abstract:A scientific consensus is emerging on the benefits of dc distribution in medium voltage power systems of ships and cities. At least 50 % space savings and increased power transfer capacity are estimated with enhanced voltage dc operation of electric cables. The goal of this research is to contribute to developing the empirical knowledge on the insulation performance in order to validate the feasibility of such anticipated gains of dc versus ac, and to determine the comparative impact of different operational conditions from a component engineering point of view. The partial discharge (PD) activity in cables is measured under ac and dc conditions as an indicator of insulation performance. Specifically, PDs in defects at the semicon-insulation interface are studied in terms of inception voltage, repetition rate and discharge magnitude. Empirical understanding is drawn for operating voltage and frequency dependence of the discharge behavior in such voids in the range of 10 to 20 kV and 0 to 0.1 Hz, respectively. The change in PD activity with void evolution is explored.

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“…A good discussion on these aspects is provided in [13][14][15]. Some aspects relevant in supporting our observations are discussed here.…”

Section: Background On Partial Discharges In Insulation Systemsmentioning

confidence: 74%

“…This time lag in availability of electrons to initiate a discharge is stochastic, resulting in a statistical over-voltage ∆V [19]. It was shown that the D m is proportional to ∆V [14], which in turn affects the residual voltage across the void after the discharge has occurred.…”

Section: Pd Initiationmentioning

confidence: 99%

Impact of DC Voltage Enhancement on Partial Discharges in Medium Voltage Cables - An Empirical Study with Defects at Semicon-Dielectric Interface

Shekhar¹,

Feng²,

Gattozzi³

et al. 2017

Preprint

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show abstract

“…The combination of time lag and rise time of voltage influence the overvoltage before discharge. Increased overvoltage will increase the discharge magnitude and govern the discharge mechanism [5].…”

Section: Polarity Of Discharges and Waiting Time For Start Electronsmentioning

confidence: 99%

Experimental Challenges when Measuring Partial Discharges under Combined DC and High Frequency AC Voltage

Olsen

Velo

Mauseth

2017

NORD-IS

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The present paper reviews some of the challenges involved in designing and building an experimental setup for measurement of partial discharge under combined AC and DC voltage. A design of a modular test cell is discussed, as well as all parameters relevant to proper control of the experiment conditions. The described experimental setup is capable of producing sinusoidal AC voltage at a variable frequency up to 5 kHz superimposed a high DC voltage. The challenges related to intermittent noise reduction was remedied by placing the setup in a Faraday cage and controlling the setup from the outside by optical cables. All equipment in the test setup was connected to the power grid through low-pass filters.

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“…O valor da tensão de ignição ( ) não é obrigatoriamente igual ao valor da tensão de ruptura ( ) em razão da existência de um tempo de atraso ( ) para a ocorrência da primeira descarga. Logo, a diferença entre e é denominada sobretensão (BOGGS, 1990;DEVINS, 1984;MORSHUIS, 1993 NIEMEYER, 1995).…”

Section: Influência Do Campo Elétricounclassified

“…Após a ocorrência da primeira descarga, as descargas consecutivas apresentarão tempos de atraso muito curtos, na ordem de milissegundos, sendo estes valores diversas ordens de magnitude maiores que o tempo de formação de uma avalanche (BOGGS, 1990;DISSADO;FOTHERGILL, 1992;MORSHUIS, 1993MORSHUIS, e 1995. Portanto, a diferença entre a tensão de início e a tensão de ruptura, obtida a partir da curva de Paschen, denominada sobretensão é considerada o parâmetro mais importante no processo de descarga por estresse elétrico (DEVINS, 1984;MORSUIS, 1993 …”

Section: Ionizaçãounclassified

Detecção acústica de descargas parciais com transdutor piezoelétrico

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The 1984 J. B. Whitehead Memorial Lecture the Physics of Partial Discharges in Solid Dielectrics

Cited by 134 publications

References 7 publications

Impact of DC Voltage Enhancement on Partial Discharges in Medium Voltage Cables - An Empirical Study with Defects at Semicon-Dielectric Interface

Impact of DC Voltage Enhancement on Partial Discharges in Medium Voltage Cables - An Empirical Study with Defects at Semicon-Dielectric Interface

Experimental Challenges when Measuring Partial Discharges under Combined DC and High Frequency AC Voltage

Detecção acústica de descargas parciais com transdutor piezoelétrico

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