Threat of harmonics to underground cables

Patil, K. D.; Gandhare, W. Z.

doi:10.1109/sces.2012.6199082

Cited by 3 publications

(4 citation statements)

References 3 publications

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“…Many studies and experience grid shows that the most significant harmonics rang are Ih3 (canceled by using star coupling), 5th, 7th, 11th, and 13th harmonics, and the least significant harmonics are the pair harmonics and multiple. The dominant harmonics are critical in 400 kV underground lines generated in practice by converter stations [29][30], [35]. To illustrate the influence of harmonics in underground electric cables, four cases with different percentages of harmonics without the fundamental current has been studies.…”

Section: Presence Of the Harmonics Currentmentioning

confidence: 99%

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Magnetic field evaluation around 400 KV underground power cable under harmonics effects

Boudjella¹,

Ayad²,

Rouibah³

et al. 2022

Diagnostyka

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Power lines or underground power cables generate electromagnetic interaction with other objects near to them. This study evaluates the magnetic field emitted by underground extra high voltage cables. The presented work aims to show a numerical simulation of the magnetic field of a buried 400 kV underground power line, which is used as a novel prototype in several countries at a short distance. The underground power cable study, in the presence of the current harmonics at different positions, with time variation by finite element resolution, using Comsol Multiphysics with Matlab software in two dimensions. The simulation results illustrate the magnetic flux density variation-in terms of amplitude and distribution as a function of different actual harmonics rates. The underground cable performance and magnetic field have affected by the harmonics effects. The maximum magnetic induction levels generated by significant harmonics are superior to the limits recommended by the international standard norms. In this paper, shielding has been used as an appropriate remedy to attenuate the magnetic field.

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Section: Presence Of the Harmonics Currentmentioning

confidence: 99%

“…The supposed values of four THD are respectively 2.8 %, 3.6 %, 4 %, and 4.7 % with harmonics rang Ih5, Ih7, Ih11, and Ih13. We choose several levels and order of harmonics respecting the experimental measurements [35], as represented in Fig. 8.…”

Section: Presence Of the Harmonics Currentmentioning

confidence: 99%

Magnetic field evaluation around 400 KV underground power cable under harmonics effects

Boudjella¹,

Ayad²,

Rouibah³

et al. 2022

Diagnostyka

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show abstract

“…Thereafter, using Equation 18let us explain (19) and (20) in terms of the scale parameter, as follows:…”

Section: Reliability Model In the Presence Of Current And Voltage Harmentioning

confidence: 99%

“…However, results of aging tests of insulation under distorted voltage are rare in the literature, due to the experimental difficulties in arranging test set-ups for aging of insulation in the presence of distorted voltage. For this reason, attention in the literature of reliability models under harmonic distortion is mainly concentrated on the thermal effect of current harmonics [19][20][21][22][23] although applications relevant to the electrical aging can also be found e.g., in [24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Forecasting the Reliability of Components Subjected to Harmonics Generated by Power Electronic Converters

et al. 2020

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This paper aims at refining an experimentally based reliability model for the insulation of power components subjected to the randomly varying harmonics generated by power electronic converters. Compared to previous papers of the same authors and to the existing literature, here the model is re-formulated from the theoretical viewpoint focusing on the foremost role played by low percentiles of time to failure—in particular by the 1st percentile—selected as the rated life in the framework of modern probabilistic design of components. This is not only more correct from the viewpoint of component design, but also on the safe side as for the reliability of devices. Moreover, the application of the model is broadened to treat the whole sequence of odd voltage harmonics from the 5th to the 25th, i.e., those taken as the most significant in power systems according to international standards. The limits to voltage distortion set in Standard EN50160 are the reference for establishing parametrically a series of typical distorted voltage waveshape analyzed in the applicative part, which account for the possible phase-shift angles between voltage harmonics. The effect of current harmonics is also considered, from both the theoretical and applicative viewpoint. As a last, but not least novelty, the reliability model is used here for life and reliability estimates not only of Medium Voltage (MV)/Low Voltage (LV) capacitors and cables—already studied in the previous stages of this investigation—but also of induction motors and transformers in the presence of harmonics from power converters.

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Evaluation of system losses due to harmonics in medium voltage distribution networks

Lombard

Rens

2016

2016 IEEE International Energy Conference (ENERGYCON)

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Threat of harmonics to underground cables

Cited by 3 publications

References 3 publications

Magnetic field evaluation around 400 KV underground power cable under harmonics effects

Magnetic field evaluation around 400 KV underground power cable under harmonics effects

Forecasting the Reliability of Components Subjected to Harmonics Generated by Power Electronic Converters

Evaluation of system losses due to harmonics in medium voltage distribution networks

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