Investigation on Partial Discharge Activity inside the Cable Accessories due to Improper Installation of Power Cable Joints

Batalović, Mirza; Matoruga, Halid; Berberović, Sead; Matoruga, Mirza

doi:10.1109/eurocon.2019.8861893

Cited by 5 publications

(6 citation statements)

References 11 publications

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“…At the installation site, two sections of cables are connected by cable joints to form a pathway according to specific processes. The pathway primarily includes the (1) conductor, (2) conductor shield, (3) XLPE insulation layer, (4) copper connection tube, (5) semi-conductive self-adhesive tape, (6) insulation shield, (7) stress cone, (8) accessory insulation layer, (9) shielding tube, and (10) accessory semi-conductive layer. The cable operating environment is complex, necessitating waterproof and insect-proof treatments on the outermost part of the joints, such as wrapping with multilayer insulating waterproof tape, steel armor, and armor tape.…”

Section: Cable Joint Size and Materials Parametersmentioning

confidence: 99%

Analysis of electric field and partial discharge characteristics of cable joint stress cone dislocation defects

Sun,

Lv,

Xie

2024

IET Science Measure & Tech

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The mechanisms governing electric field and partial discharge (PD) under stress cone dislocation remain unclear. This study employs the finite element method to explore the relationship between the electric field, externally applied voltage, and length of dislocation. Subsequently, the correlation between voltage and electric field is determined. The relationship between voltage and PD is established through PD tests conducted under stress cone dislocation conditions. By considering the influence of voltage, the association between the electric field and PD is established, revealing the mechanism of PD initiation by electric field distortion in joints. The findings suggest that the lifetime and reliability were increased by wrapping semi‐conductive self‐adhesive tape around the exposed cross‐linked polyethylene (XLPE) insulation layer. The electric field at a specific location is approximately proportional to the applied voltage. However, the slope is influenced by the composite insulation interface and the radial distance of the copper conductor. When crossing the interface between the XLPE insulation layer and the accessory insulation layer, the slope decreases significantly. The threshold for electric field PD is determined by examining the electric field distribution and the PD inception voltage during testing. When the voltage is sufficiently high, significant electric field distortions can occur at multiple points in the joint, potentially leading to concurrent PDs at several locations.

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Section: Cable Joint Size and Materials Parametersmentioning

confidence: 99%

Analysis of electric field and partial discharge characteristics of cable joint stress cone dislocation defects

Sun,

Lv,

Xie

2024

IET Science Measure & Tech

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“…No estudo realizado por Batalović et al (2019), foi analisado um cabo XLPE de 35 kV, com cerca de 5 metros de comprimento, por meio de simulações computacionais via métodos de elementos finitos, além do teste convencional offline de medição de DPs a partir de uma fonte secundária de tensão. Em ambas situações foram analisadas a influência da presença de partículas condutoras que possam contaminar a isolação do cabo e acessórios, gerando consequentemente degradação do material devido a descargas superficiais, visto que ocorre um incremento do campo elétrico no local de defeito.…”

Section: Estudo Do Efeito De Dp Em Cabos E Acessórios De Média Tensãounclassified

“…2004). Cerca de 60% destas falhas ocorrem devido a defeitos internos do isolamento dos cabos, sendo que o restante está relacionado a influencias externas, como por exemplo, atividades de escavação em regiões próximas as instalações dos cabos (Batalović et al 2019).…”

Section: Introductionunclassified

“…No que tange seus aspectos construtivos, os cabos de média tensão fabricados atualmente possuem isolações sólidas fabricadas a partir de materiais termofixos, como o polietileno reticulado (XLPE), o qual é bastante sensível ao fenômeno de descargas parciais (DP), sendo as conexões dos cabos a parte mais vulnerável e suscetível a falhas, seja devido a defeitos de fabricação, mau manuseio durante o processo de instalação (capa de contaminar ou danificar o isolamento), e o próprio envelhecimento da isolação devido a estresse elétrico e térmico (Batalović et al 2019).…”

Section: Introductionunclassified

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Diagnóstico e Monitoramento de Cabos Isolados através da Análise de Descargas Parciais: O Estado da Arte

Ribeiro

Paula

2020

Anais Do Congresso Brasileiro De Automática 2020

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Este trabalho apresenta uma ampla e minuciosa revisão bibliográfica sobre a avaliação de descargas parciais para o diagnóstico e monitoramento do estado da isolação de cabos de média e alta tensão. Todos os possíveis métodos de detecção da atividade de descargas parciais, com os respectivos sensores adequados para cada situação, são discutidos de forma a explicitar suas vantagens, limitações e aplicações. É apresentada também uma avaliação dos métodos e parâmetros utilizados no tratamento dos dados de medição e discutido como os mesmos influenciam na distinção entre os sinais associados a descargas parciais e ruídos externos do sistema. Por fim, de forma ilustrar a aplicação das técnicas discutidas, são apresentados relatos de casos encontrados na literatura nos quais foram empregadas metodologias de monitoramento baseadas no controle dos níveis de descargas parciais em cabos isolados e adotadas estratégias de manutenção baseadas nesse princípio.

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“…The primary cause of power cable failure is the breakdown of cable insulation, leading to insulation damage [3][4][5]. Many cable system failures stem from manufacturing issues, such as voids, insulation contamination, improper armour material selection, armour protrusion, and improper jacket selection [6]. These factors exacerbate local stress, leading to premature failure or an accelerated aging process.…”

Section: Introductionmentioning

confidence: 99%

Measurement and Identification of Partial Discharge in 11kV XLPE Cable Jointing

Syed Akmal Syed Jamalil,

Ahmad Zaidi Abdullah,

Mohd Hasrul Hamzah

et al. 2023

ARASET

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The reliability of power networks can be compromised by failures in cable connections, which are often caused by poor insulation quality. The use of different insulating materials during the connection process can result in defects, leading to partial discharge (PD) in high voltage equipment. PD measurements using a Rogowski Coil sensor and a high-efficiency Oscilloscope, following the IEC-60270 guidelines, are a widely recognized method for evaluating the quality of insulation systems. Experimental measurement was performed at university high voltage laboratory. This paper focuses on measuring PDs in extension (joint) cables, where they typically occur, specifically in 11kV XLPE jointing cables, and comparing them with ordinary cables without jointing. The project aims to analyze PD signal characteristics and identify partial discharge patterns in the time and frequency domains using MATLAB. .

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Investigation on Partial Discharge Activity inside the Cable Accessories due to Improper Installation of Power Cable Joints

Cited by 5 publications

References 11 publications

Analysis of electric field and partial discharge characteristics of cable joint stress cone dislocation defects

Analysis of electric field and partial discharge characteristics of cable joint stress cone dislocation defects

Diagnóstico e Monitoramento de Cabos Isolados através da Análise de Descargas Parciais: O Estado da Arte

Measurement and Identification of Partial Discharge in 11kV XLPE Cable Jointing

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