Identification of aged cable section in 12.5 kV URD system based on Frequency Spectrum

Underground residential distribution (URD) power cables are a g ed due to electrical, thermal, mechanical and environmental stress durin g their service. For utilities, the online monitorin g and dia g nostics of the dielectric conditions of the cables hel p in mana g in g their cable asset. One of the cable online diagnostic methods is based on analysis of the ca p acitor switchin g sur g e transient voltages on cable.

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“…Heuristic Algorithm is used by tuning the variance for minimum misclassification of training data sets [12]. …”

Section: Original Probabilistic Neural Network (Opnn) Based Classificmentioning

confidence: 99%

Analysis of online capacitor switching transient voltages on experimental MV cables

Pushpanathan

Grzybowski

2014

2014 ICHVE International Conference on High Voltage Engineering and Application

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“…For instance, through simulation studies, [14] observed the behavior of the transient waveforms of the cable were significantly influenced by the cable insulation parameters. A neural network-based method that compared the frequency spectrum features of the transient voltages of the cables was proposed in [15]- [16], and it successfully identified the aged cables from the new ones under capacitor switching. However, the cross-bonded cable is not included in these research studies, and the potential of the transient disturbances requires further investigation.…”

Section: Introductionmentioning

confidence: 99%

Transient Disturbances Based Non-Intrusive Ageing Condition Assessment for Cross-Bonded Cables

Yang

Luo

et al. 2020

IEEE Access

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The cross-bonding is the most common shield/sheath-bonding system now in use on singleconductor shielded power cables for long distance power transmission. But the complex bonding brings great challenges to the assessment of cable ageing conditions. This paper proposes a non-intrusive ageing assessment method using the transient disturbances originating from the system. The cable relative permittivities, instead of the traditional dielectric loss angle, were extracted from the responses of the transient disturbances to character the ageing state more sensitively. The decoupling analysis of the crossbonded cable and the corresponding relative permittivity identification model were investigated. Since the transient disturbances appear naturally and frequently, a continuous tracking of the cable ageing conditions can be established without interferences to the power system. Moreover, only the magnitudes rather than the phase angles of the cable currents/voltages are required in this method, which effectively simplifies the functions of the signal acquisition devices. The proposed method provides a new idea to assess the ageing conditions of the cross-bonded cables, and has the potential to be applied in industry. INDEX TERMS cross-bonded cable, ageing, transient disturbances, non-intrusive

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Diagnosis of overall 10kV cable insulation state based on transient voltage transfer characteristics

Jie

Yang

Zhang

et al. 2021

2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)

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Identification of aged cable section in 12.5 kV URD system based on Frequency Spectrum

Cited by 7 publications

References 13 publications

Analysis of online capacitor switching transient voltages on experimental MV cables

Analysis of online capacitor switching transient voltages on experimental MV cables

Transient Disturbances Based Non-Intrusive Ageing Condition Assessment for Cross-Bonded Cables

Diagnosis of overall 10kV cable insulation state based on transient voltage transfer characteristics

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