Cable-Capacitance Discharge Time With and Without the Application of Grounding Device

Paul, Dev; Chavdarian, P.; Haddadian, Vahik

doi:10.1109/tia.2010.2091380

Cited by 20 publications

(3 citation statements)

References 6 publications

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“…T HE cable charging and discharging phenomenon has been a concern to cable engineers when performing AC/DC tests and during maintenance work [1]- [5]. Recently, the charging/discharging phenomenon has received new consideration from utilities when using high-voltage (HV) cables for voltage control during periods of light load which require nightly switching of cables [6] and it is the main concern of an informal forum formed by several European system operators.…”

Section: Experimental and Theoretical Analysis Of Cable Discharge I mentioning

confidence: 99%

“…for 60 <t<148 min, with t 1 = 60 min and t 2 = 148 min. The time constant is calculated using the total leakage resistance R total = R ext2 ||R cable = 290 MΩ and the cable capacitance C cable =29.25 µF τ = R total C cable (5) resulting into τ = 8483 s = 141.38 min.…”

Section: A Field Test Of a 275 Kv Pt-pof Cable In Japanmentioning

confidence: 99%

“…At 60 Hz, assuming a typical propagation velocity of 150 m/µs, it is λ = (150 × 10 6 )/60 = 2500 km, being even larger for lower frequencies. In such case, the cable is considered as "short" and the response of the cable and insulators connected to it follows the equations of a simple parallel RC circuit with time constant given by (5).…”

Section: Calculation Of Leakage Resistance and Time Constants Fomentioning

confidence: 99%

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Experimental and Theoretical Analysis of Cable Discharge

Lafaia¹,

Ghassemi

Ametani³

et al. 2017

IEEE Trans. Power Delivery

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This paper focuses on the phenomenon of discharge of HVAC cables, which is a concern for utilities when performing AC/DC tests, during maintenance works, and more recently when switching cables for grid voltage control. The study is based on field and laboratory tests of 275 kV pressurized-oil-filled (POF) cables, analytical calculations, and simulations. The contributions of this paper are: field and laboratory measurements of voltages and leakage currents during cable discharge, including a field test carried out in 2015 by the National Grid (UK) on a 275 kV POF cable of 21 km; a method for estimating the leakage resistance and the time required to discharge a cable system using simple parallel RC circuit theory; and typical values of leakage resistance, leakage current, and discharge time for 275 kV cable systems. The influence of temperature, electric field, and humidity on cable discharge is also discussed and a correction factor to account for the impact of humidity is proposed. Index Terms-Cable discharge, cable leakage current, cable field tests.

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Section: Experimental and Theoretical Analysis Of Cable Discharge I mentioning

confidence: 99%

Section: A Field Test Of a 275 Kv Pt-pof Cable In Japanmentioning

confidence: 99%

Section: Calculation Of Leakage Resistance and Time Constants Fomentioning

confidence: 99%

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Experimental and Theoretical Analysis of Cable Discharge

Lafaia¹,

Ghassemi

Ametani³

et al. 2017

IEEE Trans. Power Delivery

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A sustainable electrical interface to mitigate emissions due to power supply in ports

Coppola

Fantauzzi

Lauria

et al. 2016

Renewable and Sustainable Energy Reviews

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Electrical characteristics of cold ironing energy supply for berthed ships

Sciberras

Zahawi

Atkinson

2015

Transportation Research Part D: Transport and Environment

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a b s t r a c tThe reduction of emissions in harbours is of particular importance due to the proximity to human habitation. Vessels normally run onboard generators, typically using diesel fuel, to provide the service loads while berthed. New and upcoming regulations aim to decrease emissions from shipping, and coupled with increased environmental consciousness of ship owners and harbour operators, shore supply is becoming a more popular and feasible option. Cold ironing provides an alternative locally emission-free solution by having berthed ships plug in to the shore electrical network, such that the onboard electrical energy demand is supplied from land. Electrically, a number of different shore network topologies are possible, providing different infrastructural options of supplying power to multiple berths. This paper examines the electrical characteristics of one such installation and the impact on the shoreside electrical network for an existing port using actual visiting ship power profiles. The paper examines how the cold ironing system influences important electrical network characteristics such as bus voltages and power quality, as well as the potential impact on the rest of the utility distribution system.

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Cable-Capacitance Discharge Time With and Without the Application of Grounding Device

Cited by 20 publications

References 6 publications

Experimental and Theoretical Analysis of Cable Discharge

Experimental and Theoretical Analysis of Cable Discharge

A sustainable electrical interface to mitigate emissions due to power supply in ports

Electrical characteristics of cold ironing energy supply for berthed ships

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