Surge protection of underground distribution cables

Martinez, J.A.; González-Molina, F.

doi:10.1109/61.853016

Cited by 18 publications

(12 citation statements)

References 9 publications

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“…However, the method from [4] does not account for proper attenuation constants, yielding approximate positions where the maximum voltage occurs. An improved approach is presented in [5], where the JMARTI line model is utilized to obtain voltages and currents at internal points using an off-line solution scheme.…”

Section: Introductionmentioning

confidence: 98%

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Frequency-domain computation of maximum lightning overvoltage along a cable protected by surge arresters

Cervantes

Ramirez

2014

2014 North American Power Symposium (NAPS)

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This paper presents a frequency-domain (FD) approach for calculating the maximum overvoltage along an underground cable (UC) due to lightning. It is considered that the UC is protected by surge arresters at both ends. In the proposed method, the UC is spatially subdivided and direct FD algebraic relations are used to calculate the voltage at each subdivision. Surge arresters are piece-wised represented in the FD and resolved based on the superposition principle. Flashovers are assessed and resolved also in the FD using the superposition principle. The proposed FD approach can be utilized to validate time domain (TD) methods based on the traveling wave concept or on constant-parameter line representation. The proposed method is applied to a 300 kV system with different cable lengths and compared with the results given by the PSCAD software.

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Section: Introductionmentioning

confidence: 98%

“…The analysis of maximum overvoltages inside an UC due to lightning strokes, based on lattice diagrams, is presented in [4]. However, the method from [4] does not account for proper attenuation constants, yielding approximate positions where the maximum voltage occurs.…”

Section: Introductionmentioning

confidence: 99%

Frequency-domain computation of maximum lightning overvoltage along a cable protected by surge arresters

Cervantes

Ramirez

2014

2014 North American Power Symposium (NAPS)

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“…Surge arrester is used to decrease cable line faults [2]. On the other hand, the effect of cable length on transient behavior of cable line and consequently on the stressing condition of its insulation is very vital.…”

mentioning

confidence: 99%

Maximum lightning overvoltage location and reliability indices in power system with combined transmission line

Sadeh

Damchi

2010

2010 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America (T&D-La)

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Abstract--In recent years with the expansion of the power system and competing the electrical energy market, cause is to optimum designing power system and optimizing power system maintenance methods with decreasing unnecessary cost without affecting overall power system reliability.Combined transmission line is one of the factors that affect on power system reliability indices, because cable lines are manufactured with high voltage insulations, while high voltage insulations are known as weak points in the power system in view of reliability. Therefore, many efforts have been done for increasing high voltage reliability insulation, e.g. improving insulation endurance and optimizing insulation system design [5].Reliability analysis of the power system that contains combined line is very important because most faults on transmission lines are transient and these faults do not cause that overhead line be permanently out of service. Transient faults are typically caused by lightning activity, and they have a very short duration. Transient faults automatically clear by auto-reclose operation of the line circuit breakers. Automatic clearing operation time takes less than a second and clearing operation does not require human intervention. Whereas autoreclose operation can not clear cable insulation faults and also cable insulation does not restore like air insulated transmission line. Therefore, cable fault always causes that cable line completely be out of service [6]. Repairing damaged cable line takes several days or even some weeks [7].The cable failure rate depends on several factors, such as voltage stress, age of cable line, insulation defects and design of cable [8]. Therefore, one of the factors that affect the combined transmission line reliability is age of cable, because of cable line failure rate increases by increasing cable line age [9].In this paper, variations of the maximum overvoltage amount and location are analyzed by changing cable line length and number of spans before a cable line in the power system with a combined transmission line. Also, reliability analysis is performed for combined transmission line which the cable line is protected by surge arresters at both ends.

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“…Cable line length has a significant effect on the amount of maximum overvoltage along a cable. Therefore, surge arresters can be used to decrease faults and overvoltage in cable lines [8]. Surge arresters have high impedance against normal voltage and have low impedance against transient voltages, thereby transferring those electric waves to the ground.…”

Section: Introductionmentioning

confidence: 99%

“…Reference [12] presents an improved approach where the JMARTI line model is utilized to obtain voltages and currents at the line ends used to calculate the internal points using an off-line time step. The analysis of maximum overvoltages inside an underground cable due to lightning strokes is presented in [8] based on lattice diagrams. However, according to this reference, proper attenuation constants are not accounted for, yielding approximate positions where the maximum voltage occurs.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Cable Characteristics on Maximum Overvoltage in Combined Overhead/Cable Lines Protected by Surge Arresters

Alizadeh¹,

Mirzaie²

2018

IIUMEJ

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This paper presents the calculation of maximum lightning overvoltage for a transmission system consisting of overhead lines in combination with an underground power cable. For this purpose, a 132 kV overhead transmission line combined with an underground cable is considered. This combined line has been protected by surge arresters. EMTP-RV and MATLAB software are used to conduct the modeling, simulation and calculation works. Lightning strikes on the tower top and results in large over-voltages appearing along overhead lines and cable. Underground cable characteristics have significant effects on maximum lightning over-voltages. Therefore, the three characteristics considered for these effects are: (i) cable length; (ii) cable core resistivity, (iii) cable sheath resistivity. Tower footing resistance effect is also included in the computer simulation. ABSTRAK:Kajian ini berkenaan tentang pengiraan takat maksimum voltan kilat berlebihan bagi sistem transmisi melibatkan kabel atas kepala termasuk kabel tenaga bawah tanah. Bagi tujuan ini, talian kabel penghantaran atas kepala 132 kV termasuk kabel bawah tanah telah diambil kira. Kombinasi kabel ini dilindungi dengan penahan lonjakan voltan tenaga. Perisian EMTP-RV dan MATLAB telah digunakan untuk membuat model, simulasi dan kerja-kerja pengiraan. Panahan petir di atas puncak bangunan merupakan penyebab utama voltan berlebihan muncul bersama talian atas kepala dan kabel. Ciri-ciri kabel bawah tanah merupakan faktor penyumbang utama ke atas voltan berlebihan daripada kilat. Oleh itu, tiga kes telah diambil kira sebagai penyumbang voltan berlebihan: (i) panjang kabel; (ii) rintangan teras kabel, (iii) rintangan sarung kabel. Kesan rintangan tapak bangunan turut diambil kira dalam simulasi komputer.

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Surge protection of underground distribution cables

Cited by 18 publications

References 9 publications

Frequency-domain computation of maximum lightning overvoltage along a cable protected by surge arresters

Frequency-domain computation of maximum lightning overvoltage along a cable protected by surge arresters

Maximum lightning overvoltage location and reliability indices in power system with combined transmission line

The Effects of Cable Characteristics on Maximum Overvoltage in Combined Overhead/Cable Lines Protected by Surge Arresters

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