On-line monitoring and analysis of the dielectric loss in cross-bonded HV cable system

Yang, Yang; Hepburn, Donald M.; Zhou, Chengke; Zhou, Wenjun; Jiang, Wei; Tian, Zhigang

doi:10.1016/j.epsr.2017.03.036

Cited by 15 publications

(6 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unfortunately, it is possible that some earthing systems which have not been tested are damaged. It is worth underlining that DSOs have problems with thieves, who steal copper elements of earthing systems, or unreliable contractors, who use iron rods instead of copper or a combination of both-copper rods close to the surface and iron rods underground in order to pass visual inspection and get the work approval [77]. It is noted that monitoring of cable segments may be improved if the return factor (RF 110/15 ), which occurs under phase to earth fault conditions, is analyzed.…”

Section: Discussionmentioning

confidence: 99%

Monitoring of MV Cable Screens, Cable Joints and Earthing Systems Using Cable Screen Current Measurements

et al. 2020

View full text Add to dashboard Cite

The paper presents the possibility of using cable screen earthing current measurements for MV, single-core cable line monitoring. Cable screen earthing current measurement allows the condition of cable screen connections, degradation of earthing systems, and the earthing system integrity to be observed, which allows a condition based maintenance (CBM) strategy to be introduced for cable screens and earthing systems in MV networks. CBM allows the workload and failure rate to be reduced. Analysis of the condition of the cable screen and earthing system is carried out based on the cable screen earthing current trends and rapid changes of the current. The proposed system is integrated with a state of the art advanced metering infrastructure (AMI) and uses AMI data to calculate currents flowing through cable segments of the analyzed feeder. Additionally, a system which counts thermo-mechanical stresses associated with high current incidents in cable screens is proposed. The stresses are assessed using data from conventional protection relays and the ratio of currents in the cable core and cable screens. The stresses can be used as an indicator of the cable joint condition. The presented phenomena are studied carefully in PowerFactory software. Theoretical considerations are confirmed using measurements taken in the real MV cable line. Finally, the results of a SWOT analysis are presented and future research activities are outlined.

show abstract

Section: Discussionmentioning

confidence: 99%

Monitoring of MV Cable Screens, Cable Joints and Earthing Systems Using Cable Screen Current Measurements

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Then the impedance spectroscopy of the single-phase cable with local deterioration can be calculated segment by segment. Firstly, the impedance Zb at position x = lb can be directly calculated by (13). Secondly, the impedance Za at position x = la can be calculated by taking Zb as the load.…”

Section: Determination Of Aging and Local Deteriorationmentioning

confidence: 99%

“…Currently, the value of tan δ can be obtained either through offline testing or online monitoring [12]. The method of online monitoring is realized by calculating the phase difference of the monitoring values of voltage and current at both ends of the cable [13]. However, it is difficult to obtain the voltage signals from the cable joint without affecting normal operation.…”

Section: Introductionmentioning

confidence: 99%

Feasibility Study on Online Diagnosis of Aging and Deterioration of Medium Voltage (MV) Three-Core Cable Based on Impedance Spectroscopy

Yuan

Chen

et al. 2023

IEEE Access

View full text Add to dashboard Cite

In order to explore the feasibility of impedance spectroscopy in the application of online diagnosis of aging and deterioration of medium voltage (MV) three-core cables, based on the theory of transmission line equation, an aging and deterioration model of the MV three-core cable has been established. The impedance spectroscopy of the cable head-end under healthy and different aging and degradation states has been simulated and analyzed. Further, the effects the extent of aging, local deterioration size and position, line length, load rate and other factors on the impedance spectroscopy have been studied. Based on the influence of the various factors on the impedance spectroscopy, a set of aging and deterioration diagnosis procedures and methods are proposed. The simulation results indicate that the impedance spectroscopies of healthy state and different aging and/or deterioration states have certain characteristics. These characteristics can be determined by specific criterion indicators such as the monotonous decrease of the value of the resonance peaks and the phase amplitudes, the value of the resonance peaks, and the eigen propagation frequency, etc. Therefore, impedance spectroscopy has broad application prospects for online diagnosis of aging and deterioration of MV three-core cable.INDEX TERMS Power cable, aging and deterioration, online diagnosis, impedance spectroscopy.

show abstract

“…Sheath losses are current-dependent and can be divided into two categories according to the type of bonding [4], [24], [25]. Sheath circulating losses appear due to the sheath bonding from both ends as a result of passing a current between the sheath and the ground.…”

Section: Sheath Losses Of Single-core Underground Cablesmentioning

confidence: 99%

“…It was connecting the second cable's sheath end-point with the third cable's beginning sheath point in the last section to make the directional summation of induced voltages in all parts equal to zero without flowing any circulating current except the eddy currents. This method is most likely to be employed in very high voltage cables because its expansiveness [4], [23]− [25].…”

Section: Sheath Circulating Lossesmentioning

confidence: 99%

Simulation of sheath voltage, losses and loss factor of high voltage underground cable using MATLAB/Simulink

Abed¹,

Suhry²,

Ibrahim

2022

IJPEDS

View full text Add to dashboard Cite

<p>In this paper, 22 equations for high voltage cable sheaths are simulated in one model. The model outputs are represented by cable sheath voltages, circulating currents, losses and factors, eddy currents, losses, and factors in both tides laying states (trefoil and flat) when grounding the sheaths from a single point, two points, or cross-link. These values depend on the cable manufacturing's specific factors. The other factors affecting these values are specific to the laying and operation: the load current, the length of the cable to be laid out, the spacing between the cables, and the power frequency. This research aims to reduce or eliminate the losses of the cable sheath. These two types of currents cause losses that may sometimes equal the losses of the conductor of the cable carrying the load current. Which reduces the capacity of the cable and reduces the heat dissipation of the cable into the soil and damages it. Electricians are at risk of electrocution due to the high voltages of the sheaths when there is no current in the sheaths. Therefore, these currents and voltages must be eliminated by making a new model that studies the effect of all these factors on them.</p>

show abstract

On-line monitoring and analysis of the dielectric loss in cross-bonded HV cable system

Cited by 15 publications

References 16 publications

Monitoring of MV Cable Screens, Cable Joints and Earthing Systems Using Cable Screen Current Measurements

Monitoring of MV Cable Screens, Cable Joints and Earthing Systems Using Cable Screen Current Measurements

Feasibility Study on Online Diagnosis of Aging and Deterioration of Medium Voltage (MV) Three-Core Cable Based on Impedance Spectroscopy

Simulation of sheath voltage, losses and loss factor of high voltage underground cable using MATLAB/Simulink

Contact Info

Product

Resources

About