Influence of the Cable Accessories Installing Method on the Partial Discharge Activity in Medium Voltage Cables

Rybarz, Jacek; Borucki, S.; Kunicki, Michał; Kucińska-Landwójtowicz, Aneta; Wajnert, Dawid

doi:10.3390/en15124216

Cited by 3 publications

(2 citation statements)

References 35 publications

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“…Another phenomenon related to the insulation degradation in PEC systems is the partial discharge phenomenon, which in various studies have been documented to cause long term degradation of dielectric material insulation properties [94]- [96]. Particularly in WBG enabled MV PECs the partial discharge inception voltage will decrease with higher dv/dt posing an increased threat in terms of reliability [97]- [101]. Another failure mechanism related to the parasitic capacitive couplings is the cross-talk induced MOSFET self turn on, which poses the risk of a phase-leg short circuit [102]- [105].…”

Section: Reliability and Thermal Stressesmentioning

confidence: 99%

Parasitic Capacitive Couplings in Medium Voltage Power Electronic Systems: An Overview

Kjærsgaard

Liu

Nielsen

et al. 2023

IEEE Trans. Power Electron.

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Section: Reliability and Thermal Stressesmentioning

confidence: 99%

Parasitic Capacitive Couplings in Medium Voltage Power Electronic Systems: An Overview

Kjærsgaard

Liu

Nielsen

et al. 2023

IEEE Trans. Power Electron.

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“…Transformers and gas-insulated switchgear are among the most studied equipment in this field of application [70]. Power lines, which include medium and high-voltage cables and related accessories, are also critical components in terms of PD [71]. From a practical point of view, offline PD testing can easily be performed using ultra high frequency (UHF) sensors, while online monitoring is developing with many research applications [72].…”

Section: Partial Discharge Measurementsmentioning

confidence: 99%

A Comprehensive Review of Fault Diagnosis and Prognosis Techniques in High Voltage and Medium Voltage Electrical Power Lines

Bindi,

Piccirilli,

Luchetta

et al. 2023

Energies

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This paper presents an extensive review of the most effective and modern monitoring methods for electrical power lines, with particular attention to high-voltage (HV) and medium-voltage (MV) systems. From a general point of view, the main objective of these techniques is to prevent catastrophic failures by detecting the partial damage or deterioration of components and allowing maintenance operations to be organized. In fact, the protection devices commonly used in transmission and distribution networks guarantee the location of faults, such as short-circuits, putting the non-functioning branch of the network out of service. Nowadays, alongside these devices, it is possible to introduce new intelligent algorithms capable of avoiding the total loss of functionality, thus improving the reliability of the entire network. This is one of the main challenges in modern smart grids, which are characterized by the massive integration of renewable energy sources and a high level of complexity. Therefore, in the first part of this paper, a general overview of the most common protection devices is proposed, followed by an analysis of the most modern prevention algorithms. In the first case, the coordination of the relays plays a fundamental role in obtaining the fault location with a high level of selectivity, while in the field of preventive analysis, it is necessary to address the implementation of artificial intelligence methods. The techniques presented in this paper provide a comprehensive description of the different monitoring approaches currently used in distribution and transmission lines, highlighting the coordination of protection relays, the computational algorithms capable of preventing failures, and the influence of the distributed generation in their management. Therefore, this paper offers an overview of the main diagnostic techniques and protection devices, highlights the critical issues that can be overcome through the introduction of artificial intelligence, and describes the main prognostic methods, focusing on their invasive level and the possibility of operating directly online. This work also highlights the main guidelines for the classification and choice between the different approaches.

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Improved Locating Method for Local Defects in XLPE Cable Based on Broadband Impedance Spectrum

Wei

Pang

et al. 2022

Energies

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The crosslinked polyethylene (XLPE) cable safety is affected by environmental factors and artificial defects during operation. This work proposes an improved locating method based on broadband impedance spectrum (BIS) to locate local defects in XLPE cables. The calculation process of the algorithm has been analyzed. The selection of the incident Gaussian signal and the peak recognition method have been discussed, where the pulse width of the Gaussian signal was found to be determined primarily by the upper limit frequency of the traveling wave transmitting in the cable. The centroid and function fitting methods were established to reduce the peak recognition error caused by the test sampling rate. This work verified the accuracy of the algorithm through experiments. A vector network analyzer (VNA) was used to test the BIS of the cable. A 20 m-long cable containing abrasion and an inserted nail with different depths was measured in the BIS test. It was found that the abrasion and the nail could be located. The locating deviation of abrasion was within ±1%, and the centroid and function fitting methods could effectively reduce the locating deviation. The locating deviation was within ±1% when the depth of the nail inserted into the cable accounted for less than 50% of the insulation thickness. When the depth exceeded 75% of the insulation thickness, the deviation of each method was more significant, and the maximum absolute value of the deviation was 4%.

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Influence of the Cable Accessories Installing Method on the Partial Discharge Activity in Medium Voltage Cables

Cited by 3 publications

References 35 publications

Parasitic Capacitive Couplings in Medium Voltage Power Electronic Systems: An Overview

Parasitic Capacitive Couplings in Medium Voltage Power Electronic Systems: An Overview

A Comprehensive Review of Fault Diagnosis and Prognosis Techniques in High Voltage and Medium Voltage Electrical Power Lines

Improved Locating Method for Local Defects in XLPE Cable Based on Broadband Impedance Spectrum

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