Experimental and Theoretical Analysis of Cable Discharge

Lafaia, Isabel; Ghassemi, F.; Ametani, Akihiro; Mahseredjian, Jean; Dennis, Simon; Haddad, A.; Robson, Stephen

doi:10.1109/tpwrd.2016.2602361

Cited by 7 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, R ext will also be a function of RH. The effect of RH on R cable is far less pronounced [11].…”

Section: Circuit Model Of a Discharging Cablementioning

confidence: 92%

“…The performance of the HVAC cable in switching applications is dealt with comprehensively in [11]. The paper also used a small subset of the experimental data discussed in this paper, alongside laboratory measurements of cable discharge in controlled conditions, to arrive at a simple but accurate model for discharge based on RC circuit theory.…”

Section: Previous Workmentioning

confidence: 99%

“…The basic model of a de-energised but charged cable comprises an extremely large shunt resistance and a shunt capacitor, both to ground. The decay curve is then exponential, with a time constant given by [11]:…”

Section: Circuit Model Of a Discharging Cablementioning

confidence: 99%

See 2 more Smart Citations

Non-Contact Measurement and Analysis of Trapped Charge Decay Rates for Cable Line Switching Transients

et al. 2020

Self Cite

View full text Add to dashboard Cite

During reclosure of 275 kV cable circuits used for voltage control, excessive overvoltages were observed on the network. Such events cause onerous and costly failures. Transient simulations have shown that the normal voltage on its own cannot generate such excessive switching overvoltages. Initial investigations by the network operator pointed towards trapped charge on the unearthed as the cause of the failures. Measurement of these trapped charge voltages and their slow decay without interfering with the charge has, to the author’s knowledge, not been done before in an operational substation. This work introduces a technique to measure trapped charge at a 275 kV substation using the Electrostatic Field Mill. Since the electric field is a proxy measurement of surface voltage, field mills can also be used to measure voltage. In this paper, an on-site substation measurement setup using an electrostatic field mill has been developed for the non-contact measurement of trapped charge voltage on a 275 kV underground cable circuit following switching operations at a National Grid substation. Results of field measurements within the substation and laboratory experimentation are discussed. It is demonstrated that with adequate calibration, achieved by using the known pre-switching power frequency steady state voltage, the slowly decaying DC voltage caused by the cable trapped charge can be measured using this non-contact technique. The correlation between the instantaneous time constant and the relative humidity is also analysed.

show abstract

“…Therefore, R ext will also be a function of RH. The effect of RH on R cable is far less pronounced [11].…”

Section: Circuit Model Of a Discharging Cablementioning

confidence: 92%

Section: Previous Workmentioning

confidence: 99%

See 1 more Smart Citation

Non-Contact Measurement and Analysis of Trapped Charge Decay Rates for Cable Line Switching Transients

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The effects of temperature, electric field and humidity on cable discharge are discussed. The study is based on field and laboratory tests of 275 kV pressurised-oil-filled (POF) cables, not XLPE cable [18]. The insulation crack discharge test of the DC feeder cable is studied.…”

Section: Introductionmentioning

confidence: 99%

Application of multi‐source information fusion based on D‐S evidence theory in insulation defect identification of DC XLPE cable

Huang

et al. 2021

High Voltage

View full text Add to dashboard Cite

During the installation and laying process of cross-linked polyethylene (XLPE) cable, it is difficult to avoid the influence of external harsh environment, which leads to insulation deterioration and failure. The partial discharge and leakage current play an important role in formation mechanism, characteristic law and identification technology of DC XLPE cable defect. However, the defect identification accuracy of single source data is limited. The correlation between partial discharge and leakage current of typical defect is analysed here. Based on the shape characteristic parameters of typical DC partial discharge spectrum and the energy characteristic parameters of leakage current wavelet decomposition node, a weighted Dempster-Shafer (D-S) evidence theory is used to fuse and identify different information sources. The results show that the classification rate of the proposed method can reach 88%, which can effectively identify insulation defects.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

275 kV cable discharge field measurement and analysis of SVLs chain failure using ATP

Ghassemi

Dennis

Ainsley

et al. 2018

Electric Power Systems Research

View full text Add to dashboard Cite

Experimental and Theoretical Analysis of Cable Discharge

Cited by 7 publications

References 9 publications

Non-Contact Measurement and Analysis of Trapped Charge Decay Rates for Cable Line Switching Transients

Non-Contact Measurement and Analysis of Trapped Charge Decay Rates for Cable Line Switching Transients

Application of multi‐source information fusion based on D‐S evidence theory in insulation defect identification of DC XLPE cable

275 kV cable discharge field measurement and analysis of SVLs chain failure using ATP

Contact Info

Product

Resources

About