Sheath Overvoltages in High-Voltage Cables Resulting from Special Sheath-Bonding Connections

Ball, E.H.; Occhini, E.; Luoni, G.

doi:10.1109/tpas.1965.4766126

Cited by 24 publications

(8 citation statements)

References 4 publications

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“…Coming to transient conditions calculations, sheath overvoltages in HV cables resulting from special sheath-bonding connections were studied first, particularly in relation to phase-to-ground faults [17] and the relevant ground return current behavior [18]. The field experience and laboratory tests on zinc oxide SVLs for HV and EHV power cable were also treated [5].…”

Section: B Literature Analyses Of Cross-bonding Systemsmentioning

confidence: 99%

The Feasibility of Cable Sheath Fault Detection by Monitoring Sheath-to-Ground Currents at the Ends of Cross-Bonding Sections

Marzinotto

Mazzanti

2015

IEEE Trans. on Ind. Applicat.

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This paper aims at checking the chance that cable sheath faults in unipolar three phase HV and EHV cables with sheath cross-bonding systems can be detected by monitoring sheath-to-ground currents at the solid bonding ends of major cross-bonding sections. This goal is achieved by calculating such currents for some reference case-studies of faults of the outer thermoplastic jacket in unipolar three-phase land cables for power transmission in flat formation. The case-studies differ as to cable voltage ratings, resistance and location of the fault, symmetry of minor sections, number of major sections. The results show that the above chance does exist, particularly for some fault types and for sufficiently high cable load.

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Section: B Literature Analyses Of Cross-bonding Systemsmentioning

confidence: 99%

The Feasibility of Cable Sheath Fault Detection by Monitoring Sheath-to-Ground Currents at the Ends of Cross-Bonding Sections

Marzinotto

Mazzanti

2015

IEEE Trans. on Ind. Applicat.

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“…Unfortunately wide phase spacing results in increased induced losses and special bonding of cable sheaths is used to overcome the problem. Many papers have been written on special bonding systems and a full bibliography is included but, for completeness, a brief description of the influence of sheath losses on cable ratings is given [43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58].…”

Section: Sheath Bonding Considerationsmentioning

confidence: 99%

Natural and forced-cooling of HV underground cables: UK practice

Williams

1982

IEE Proc. A Phys. Sci. Meas. Instrum. Manage. Educ. Rev. UK

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The paper reviews the progress of the various forms of cable cooling systems that have been developed for the UK CEGB's major high-voltage transmission network. The generation and transmission system in the UK prior to the establishment of the 132kV grid is discussed, together with the reasons for building the higher-voltage network. The statutory duties of the CEGB and its transmission responsibilities are outlined, special reference being made to the undergrounding of part of the network for amenity reasons. The investigations of soil properties, their effect on cable ratings and the subsequent adoption of standardised thermal resistivity and temperature values are considered, together with the development of special backfill materials. The different types of forced cooling system are discussed: separate water-pipe, trough and weir, air, integrally and internally cooled methods being covered comprehensively. Rating limitations caused by cable joints, and the methods used to overcome them, are included. Cooling stations and the plant and control equipment installed therein are described, reference being made to the different sources of coolant, e.g. air, borehole water, river or lake water etc. A brief description of the computer methods of solving the complex equations derived for forced cooling installations, using thermal image, finite difference, finite element and analytical techniques, is given. The Appendix comprises three Tables, giving the essential design details of naturally cooled, separate-pipe water-cooled and tunnel systems installed on the CEGB's transmission system.

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“…1 [11]. Much experimental work and simulations have already been published on modelling of cross-bonded high-voltage cable systems, for example, in [12,13]. Verification of simulation results with field measurements has been made for CB cable systems [14,15].…”

Section: Introductionmentioning

confidence: 99%

Cross‐bonding cable and box model based on pulse reflection measurement

Regt

Hoogendorp

Wagenaars

et al. 2015

IET Science, Measurement & Technology

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Transients from lightning strikes can enter underground cables at overhead line to power cable transitions. Possible overvoltages on these surges at cross-bonding connections of the cable screens are of major concern. A model is developed for modelling overvoltages from transient signal propagation through a combined cross-bonding cable and box. This model is applied to the first Dutch 400 kV cable connection. Such model incorporates model parameters whose values depend on design details of the cross-bonding box. The values for these model parameters are extracted from the measured transmission and reflection signal on steep pulses injected into the actual cross-bonding box configuration. The model combines transmission line description for the cross-bonding cables with mainly inductive behaviour of the cross-bonding box. The obtained results are verified by measurements. The model is applied to investigate overvoltages induced at the cross-bonding cable and box on 1.2/50 µs impulse voltage injection representing a lightning impulse voltage applied to the core conductor of the cross-bonding cable. Furthermore, the effectiveness of surge arresters to reduce overvoltages at the cross-bonding cable screen is demonstrated by simulations with this model in PSCAD.

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Sheath Overvoltages in High-Voltage Cables Resulting from Special Sheath-Bonding Connections

Cited by 24 publications

References 4 publications

The Feasibility of Cable Sheath Fault Detection by Monitoring Sheath-to-Ground Currents at the Ends of Cross-Bonding Sections

The Feasibility of Cable Sheath Fault Detection by Monitoring Sheath-to-Ground Currents at the Ends of Cross-Bonding Sections

Natural and forced-cooling of HV underground cables: UK practice

Cross‐bonding cable and box model based on pulse reflection measurement

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