Experimental investigation into harmonic impedance of low-voltage cables

Du, Y.; Burnett, J.

doi:10.1049/ip-gtd:20000653

Cited by 15 publications

(13 citation statements)

References 1 publication

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“…More common analytic method for the calculation of frequency-dependent cable resistances is published in [21].…”

Section: Analytic Calculation Methodsmentioning

confidence: 99%

“…The analytic method for the calculation of the skin effect factor YS in [21] is identical with the method [19] described above.…”

Section: Analytic Calculation Methodsmentioning

confidence: 99%

“…The following formula is suggested in [21] for the calculation of the proximity effect factor YP for three single-core cables:…”

Section: Analytic Calculation Methodsmentioning

confidence: 99%

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Estimation of Power Losses Caused by Supraharmonics

2020

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Nowadays increases the number of power electronic devices in distribution electrical networks rapidly. Modern generation and consumption units use high switching frequency power converters for the network connection and therefore cause the voltage and current distortion in the frequency range over 2 kHz (so-called “supraharmonics”) in addition to conventional harmonics. Supraharmonics cause additional power losses in electrical equipment. The goal of the offered paper is the estimation of power losses caused by supraharmonics. The estimation is based on the measurement results obtained in a real MV/LV network in Germany.

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“…More common analytic method for the calculation of frequency-dependent cable resistances is published in [21].…”

Section: Analytic Calculation Methodsmentioning

confidence: 99%

“…The analytic method for the calculation of the skin effect factor YS in [21] is identical with the method [19] described above.…”

Section: Analytic Calculation Methodsmentioning

confidence: 99%

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Estimation of Power Losses Caused by Supraharmonics

2020

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“…A cable cannot so easily be modeled as a constant resistance and inductance. Due to the skin-and proximity effects the resistance of the cable will be influenced by the frequency [3]. Figure 2 shows the resistance of a 240 aluminum MV-cable in the frequency domain.…”

Section: Modelling the Gridmentioning

confidence: 99%

Predict the level of harmonic distortion due to dispersed generation

Cobben

Kling

Heskes

et al. 2005

18th International Conference and Exhibition on Electricity Distribution (CIRED 2005)

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“…Analytical expressions for the skin effect are available for circular conductors [15] and an analysis has also been developed for the proximity effect in a cable with four sectors [16]. Studies of harmonics have used correction factors for the AC resistance from IEC 60287 [17,18] although these do not allow for the many variations in the structures of the sector-shaped conductors and cable lay.…”

Section: Introductionmentioning

confidence: 99%

Series impedance of distribution cables with sector‐shaped conductors

Urquhart

Thomson

2015

IET Generation, Transmission & Distribution

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Models of power distribution networks require accurate cable impedance data. For unbalanced networks, both the self-impedances and the mutual impedances are needed. However, published studies use differing approaches to determine cable impedances, leaving uncertainty over the level of detail required. This study compares impedances provided by the manufacturer with those from several analytical methods, showing the impact of modelling the noncircular geometry and of including corrections allowing for the AC resistance. The analysis is compared to results from a freely available finite element (FE) solver where the current distribution is modelled in detail, taking account of eddy currents and the rotation of the cores relative to the neutral due to the cable lay. At 50 Hz, the analytical methods provide a good approximation, but the FE results show that eddy currents affect the impedance at harmonic frequencies. The results also show the impact of including the ground path in the impedance calculation. The current distribution in the ground has a wide cross-sectional area, suggesting that the assumption of a perfect multi-grounded neutral is inappropriate for low voltage networks with short cable lengths.

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Experimental investigation into harmonic impedance of low-voltage cables

Cited by 15 publications

References 1 publication

Estimation of Power Losses Caused by Supraharmonics

Estimation of Power Losses Caused by Supraharmonics

Predict the level of harmonic distortion due to dispersed generation

Series impedance of distribution cables with sector‐shaped conductors

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