Evaluation of field aged crosslinked polyethylene cables by partial discharge location

Mashikian, M.S.; Luther, R.; McIver, J.C.; Jurcisin, J.; Spencer, P.W.

doi:10.1109/61.296237

Cited by 25 publications

(6 citation statements)

References 14 publications

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“…The instrument contains a band pass filter and a high gain, wideband amplifier which is followed by a A/D converter and a microcomputer (PC) for signal processing [7]. The PD is simulated by injecting a narrow pulse at the distance d from the measuring end [5]. The measured PD pulse can be expressed as,…”

Section: Pd Measuring Systemmentioning

confidence: 99%

“…The arrival time is defined as [9]: where t[k] is the time corresponding to sample k. The arrival of pulse 1 is denoted by t 1 , while the arrival time of pulse 2 is denoted by t 2 . The PD location is estimated by using equations (4) and (5). Figure 5 shows a PD pulse its estimated arrival time using Gabor centroid method.…”

Section: Gabor Centroidmentioning

confidence: 99%

“…Several methods have been introduced to locate the PD in the cable system. One popular method of detecting PD is the traveling wave technique which becomes a standard nowadays [3][4][5]. The traveling waves of PD signals can be detected from one-and two-end of cable and their locations can be predicted using time delay estimations between the PD waves [6].…”

Section: Introductionmentioning

confidence: 99%

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Comparison of time-domain methods for two-end PD location in power cables

Firdaus

Mardiana

Muyeen

2012

2012 25th IEEE Canadian Conference on Electrical and Computer Engineering (CCECE)

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Accuracy comparison of various time domain methods for locating of partial discharge (PD) in power cables is presented in this paper. The PD location is based on the measurement from two-end of the cable. The defect in the cable is located from the arrival time interval between the initial waves of a PD pulse. To estimate the time-of arrival, various methods such as peak detection, 50% pulse peak detection, threshold detection, Akaike Information Criterion, Energy Criterion, Gabor Centroid, and cross correlation are considered. The computer simulation has been carried out using a 20 kV, 1000-m underground cable. After comparison, it is found that peak detection has better performance than other methods.

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Section: Pd Measuring Systemmentioning

confidence: 99%

Section: Gabor Centroidmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of time-domain methods for two-end PD location in power cables

Firdaus

Mardiana

Muyeen

2012

2012 25th IEEE Canadian Conference on Electrical and Computer Engineering (CCECE)

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“…The common problem with some of these techniques is their destructivity; where the application of more than 2.5 times the nominal voltage (V o ) could worsen the condition of some cables, especially if they contain certain concentration of water trees [6][7][8]. These tests could unfortunately shorten the cable's life resulting in financial losses to the utility.…”

Section: Introductionmentioning

confidence: 99%

Towards a smart replacement strategy of power cables based on the depolarization principle

Abou-Dakka

2012

2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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In spite of having excellent short-term dielectric properties, polymeric insulated cables are subjected to serious degradation problems due to defects, water treeing, partial discharges, etc... Canada more than 20% of the installed power cables are older than their designed life-time. Therefore, utilities are challenged to make the right decisions in repairing, refurbishing or completely replacing older cables. The best option for utilities is to apply a so called "smart replacement strategy of power cables", i.e. only replacing cables that could adversely affect the reliability of a network in the near future. This will be the best approach to cut operation costs as well as increase the reliability of a power system. The implementation of such a strategy can only be accomplished if and when the utilities have access to reliable and non-destructive diagnostic tools that can be applied on-site. At the National Research Council of Canada (NRC), an on-site testing technique for estimating the degree of degradation of power cables based on the polarization/depolarization current principle has been developed using a nearly noiseless high voltage solid state switch with a few ns rise time.The high frequency (HF) components of the depolarization current (I DEP ) can be measured and the area under the HF component of the I DEP curve, Q Dep , can be linked to the intensity of water treeing in cable insulations. This was observed from a series of tests on flat samples and miniature cables aged in a wet environment, and from measuring specimens removed from failed cables. Using Q Dep as Diagnostic Indicator, the tested cables were divided into three categories: Good Condition, Fair Condition and Poor Condition.In 2011 this technique was applied to a large number of cables in the local utility network. The results of these tests will be described in this paper. It will be shown that the age was not the determining factor of the cable condition. Also, it will be clarified that only -1 kV dc is sufficient to assess the condition of cables, therefore, testing with -3 kV will not change the condition determined with 1 k kV.

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“…Condition-Based-Maintenance would only be successful if a utility has access to reliable diagnostic tools to assess the operating conditions of its equipment. In the case of polymeric cables a number of techniques have been introduced [3][4][5][6][7][8], and the majority ofthem are based on the dielectric response of insulation material to an applied 1-4244-0750-8/07/$20.00 C2007 IEEE. electric field.…”

Section: Introductionmentioning

confidence: 99%

On-site Diagnostic Tests on Polymer Insulated Cables Using Depolarization Current Measurements

Dakka

Bulinski

Bamji

2007

2007 IEEE International Conference on Solid Dielectrics

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A modified technique of depolarization current measurements encompassing monitoring of high speed depolarization processes was used to perform diagnostic tests on polymeric cable insulation operating under diverse environmental conditions and voltage levels. The high frequency characteristics were compared with those of the slower depolarization processes commonly obtain during on-site tests. Both the high and low frequency measurements showed a consistent correlation with the operating conditions of the cable insulation. It was observed that the low frequency characteristics were dependent on the duration ofthe dc poling time but only if the insulation was deteriorated, especially with water trees. Unaged and relatively new insulation did not show such behavior. The majority of the field tests were performed with a relatively low dc voltage of only 1 kV or less and under very adverse environmental conditions, withtemperaturesaslowas -30°C.

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Evaluation of field aged crosslinked polyethylene cables by partial discharge location

Cited by 25 publications

References 14 publications

Comparison of time-domain methods for two-end PD location in power cables

Comparison of time-domain methods for two-end PD location in power cables

Towards a smart replacement strategy of power cables based on the depolarization principle

On-site Diagnostic Tests on Polymer Insulated Cables Using Depolarization Current Measurements

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