Determination of the characteristic life time of paper-insulated MV-cables based on a partial discharge and tan(&amp;#x03B4;) diagnosis

Mladenović, Ivana; Weindl, Christian

doi:10.1109/epepemc.2008.4635563

Cited by 13 publications

(6 citation statements)

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“…In order to deepen the knowledge about the dependencies and physical backgrounds, the dissipation factor and the PD values will be further monitored during the entire accelerated ageing experiment amongst other values, [1][2][3][4]. Additionally all PD values will be normalized on the already measured temperature-and time-specific calibrator values using the developed SQL-database system in the future.…”

Section: A) Cable Sample From a Group Of Cables In A Better Conditionmentioning

confidence: 99%

Dependencies of the PD- and tan(δ)-characteristics on the temperature and ageing status of MV PILC cables

Mladenović

Weindl

2011

2011 Electrical Insulation Conference (EIC).

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Diagnostic tools and methods for the state evaluation of MV (medium voltage) and HV (high voltage) power cables are mostly based on single key parameters like the partial discharge (PD) levels (inception voltage and intensity) or the values of the dissipation factor tan(δ). The main goals are the determination of the functionality and actual condition of the equipment. Additionally, the prediction of the rest life-time of power components could help to improve the investment planning and the maintenance strategy. In the field of cables and especially in case of PILC (Paper Insulated Lead Covered) cables, the requirements on the measurement technology and diagnostic systems are rather complex. In many cases the attention is directed to the methodology and the accuracy of the measurement equipment itself or to the value or spectrum of the measurement frequencies. However, the reliability of these methods is also very dependent on the experience of the test engineers and the knowledge and interpretation of all measured parameters. Therefore, besides the electrical parameters, in particular the temperature and humidity during the measurement, the equipment's dimensions, cable lengths and noise levels besides others must be taken into account. In this article, the principal dependencies of two major electrical criteria, which are the tan(δ)-and the PD-characteristics on the cable temperature and the cable age or the operational history of the cables, are presented. The strong correlation on e.g. the temperature makes clear, that the interpretation of a single criteria and a subsequent prognoses of the cable status are nearly impossible without further information. The derived results would be a subject of an immense scattering depending on seasonal influences, the load status during the disconnection of the analyzed lines, time constants, cable length, etc.

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Section: A) Cable Sample From a Group Of Cables In A Better Conditionmentioning

confidence: 99%

Dependencies of the PD- and tan(δ)-characteristics on the temperature and ageing status of MV PILC cables

Mladenović

Weindl

2011

2011 Electrical Insulation Conference (EIC).

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“…The cables themselves are situated in an air-conditioned container. Besides the circulation ventilators, there are several cooling ventilators and an additional heating facility installed, [4], [7], [8].…”

Section: A Physical Structurementioning

confidence: 99%

“…Therefore, in 2006 a new and worldwide unique accelerated aging project for MV cables has been started. The final goal of the project is to define the suitable parameters that describe the aging process of PILC (paper insulated lead covered) cables, [4]. Furthermore, the accuracy of the measurement system must assure the reliability of the formed database.…”

Section: Introductionmentioning

confidence: 99%

Fully Automated MV Cable Monitoring and Measurement System for Multi-Sample Acquisition of Artificial Aging Parameters

Freitag¹,

Mladenović²,

Weindl³

2010

REPQJ

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The Power quality of our networks is influenced by transients, short-and long-duration variations, voltage unbalance, waveform distortions, voltage fluctuations and power frequency variations. These impacts affect the aging rapidity of the electrical equipment and finally the entire electrical network. By partial discharge (PD) and tan(δ) analyses, it is possible to determine the electrical equipment's condition. The significance of the results depends on the quality of the measurement system and of the data interpretation. Based on these results, a reliable maintenance and investment strategy could be made, and the reliability of the network could be improved. A specially designed aging system for the accelerated aging of MV cables has been developed to point out the most relevant aging parameters and their limits, and, in this way, to upgrade the accuracy of the MV cable diagnostics. In this paper, the system's "intelligence", which controls the aging process and acquires, evaluates and stores all necessary data is presented.

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“…It has been computed that the replacement of a 2.5km long, 20kV PILC cable results in an average costs of 175000 EUR [1]. If the failed portion of the cable could be identified, the section to be replaced could be reduced to a smaller portion with a total length of approximately 20m.…”

Section: Introductionmentioning

confidence: 99%

Dissipation Factor Measurement of PILC Insulation at UHF

Raymond

Chakrabarty

Hock

et al. 2012

2012 Third International Conference on Intelligent Systems Modelling and Simulation

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In this paper, dissipation factor measurement of Paper Insulated Lead Covered (PILC) cable insulation at ultra high frequency (UHF) is described. The material under test (MUT) is clamped between two copper sheets to form a capacitor, which is connected to the Advantest R3767CG vector network analyzer (VNA) to measure its input impedance at the resonant frequency. From the input impedance, the dissipation factor is calculated. The calculated values are then compared with data obtained from commercial system to validate the proposed method.

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Determination of the characteristic life time of paper-insulated MV-cables based on a partial discharge and tan(δ) diagnosis

Cited by 13 publications

References 1 publication

Dependencies of the PD- and tan(δ)-characteristics on the temperature and ageing status of MV PILC cables

Dependencies of the PD- and tan(δ)-characteristics on the temperature and ageing status of MV PILC cables

Fully Automated MV Cable Monitoring and Measurement System for Multi-Sample Acquisition of Artificial Aging Parameters

Dissipation Factor Measurement of PILC Insulation at UHF

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Determination of the characteristic life time of paper-insulated MV-cables based on a partial discharge and tan(&#x03B4;) diagnosis

Cited by 13 publications

References 1 publication

Dependencies of the PD- and tan(&#x03B4;)-characteristics on the temperature and ageing status of MV PILC cables

Dependencies of the PD- and tan(&#x03B4;)-characteristics on the temperature and ageing status of MV PILC cables

Fully Automated MV Cable Monitoring and Measurement System for Multi-Sample Acquisition of Artificial Aging Parameters

Dissipation Factor Measurement of PILC Insulation at UHF

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Product

Resources

About

Determination of the characteristic life time of paper-insulated MV-cables based on a partial discharge and tan(δ) diagnosis

Dependencies of the PD- and tan(δ)-characteristics on the temperature and ageing status of MV PILC cables

Dependencies of the PD- and tan(δ)-characteristics on the temperature and ageing status of MV PILC cables