The calculation of circulating current for the single-core cables in Smart Grid

Li, Zhonglei; Wang, L.; Cai, Yang; Liu, H. J.

doi:10.1109/isgt-asia.2012.6303176

Cited by 19 publications

(5 citation statements)

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“…Layer 2: This layer is rule layer, and rules that are generated according to Sugeno fuzzy inference are shown in this layer. Node output is obtained with (7), and node output is called as the firing strength of one rule.…”

Section: Methodsmentioning

confidence: 99%

“…In literature, metallic sheath of high‐voltage cable is grounded to prevent cable faults and electroshock . Single‐point bonding, solid bonding, and cross bonding methods are used for grounding of metallic sheath according to IEEE 575‐1988 standard .…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8][9][10][11] Single-point bonding, solid bonding, and cross bonding methods are used for grounding of metallic sheath according to IEEE 575-1988 standard. [12][13][14][15] These methods are shown in Figures 5,6,and 7,respectively. However, transformer with star winding connection is used for transmission lines, and neutral point of transformer should be grounded for safety of transmission line. When transmission line is operated under balanced working condition, there are only positive-sequence currents.…”

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confidence: 99%

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High‐voltage cable bonding to prevent cable termination faults based on zero‐sequence current

Akbal

2019

Int Trans Electr Energ Syst

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Summary Zero‐sequence current (ZC) occurs due to harmonics and unbalanced loading current. ZC increases the sheath voltage (SV) and cable temperature, so cable faults occur on cable terminations in high‐voltage underground cable lines (HVUCL). In literature, bonding methods are used to prevent ZC effects, but these methods are not adequate to prevent ZC effects for long HVUCL under high harmonic distortion because ZC is not considered when these methods are designed. In this study, the modified sectional solid bonding (MSSB) is suggested for long HVUCL that works under high harmonic distortion rate and unbalanced loading conditions. Namely, ZC is considered when MSSB is designed. MSSB parameters should be determined before HVUCL is installed for the most economical and practical bonding. SV of HVUCL should be known to determine MSSB parameters, so SV of HVUCL is forecasted by using adaptive network‐based fuzzy inference system (ANFIS), artificial neural networks (ANN), and hybrid ANN. Training and forecasting errors of hybrid ANN are less than ANFIS and ANN methods, so hybrid ANN methods are suggested to forecast SV of HVUCL. Also, MSSB parameters should be optimized, so optimization methods are used for optimization of MSSB. When MSSB method is used for bonding of long HVUCL, harmonic distortion rate and SV in cable terminations are not exceeded the determined limits to prevent cable faults.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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High‐voltage cable bonding to prevent cable termination faults based on zero‐sequence current

Akbal

2019

Int Trans Electr Energ Syst

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“…Existing literature [8,9] has proposed analytical models for calculating branch inductance in electrical machines and singlecore cables, respectively, to determine the current in parallel strands. However, due to the complex structure of transformer windings, defining the mutual influence between strands is challenging, and analytical calculations cannot accurately determine the current distribution in multiple parallel strands within the winding turns.…”

Section: Introductionmentioning

confidence: 99%

Short‐circuit current difference of parallel strands in winding turns and its influence on the distribution of electromagnetic force

Zhao,

Si,

Jin

et al. 2023

IET Electric Power Appl

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Transformer winding turns often consist of multiple parallel strands. The spatial position variation of each strand affects the leakage inductance of each branch, resulting in an uneven distribution of short‐circuit currents within the winding turns. And this unevenness persists even when transposition structures are implemented. Traditional methods in transformer analysis frequently overlooked the distribution characteristics of short‐circuit currents when calculating electromagnetic forces. A frequency‐domain calculation method for analysing the current distribution in winding turns was proposed, with a deviation of less than 3% compared to existing analysis methods. Two typical 110 kV transformer models were utilised to investigate the influence of uneven current distribution on the spatial distribution of electromagnetic forces. The spatial distribution of short‐circuit electromagnetic forces in low‐voltage (LV) windings exhibited significant changes, with maximum change rates of 10% and 61.2% for axial and radial electromagnetic force, respectively, in a LV winding with 4 parallel strands. The research also analysed how strand radial width and axial height affect current distribution unevenness and proposed specific design principles to mitigate these disparities in winding design. The findings offer valuable insights for selecting structural parameters and assessing short‐circuit stability during transformer design.

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“…Metallic sheath of cable is grounded to decrease electric force and TEs [10–15]. Single point bonding, solid bonding and cross bonding methods are used for grounding of metallic sheath according to IEEE 575‐1988 standard.…”

Section: Introductionmentioning

confidence: 99%

High voltage underground cable bonding optimisation to prevent cable termination faults in mixed high‐voltage lines

Akbal

2020

IET Generation, Transmission & Distribution

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The calculation of circulating current for the single-core cables in Smart Grid

Cited by 19 publications

References 0 publications

High‐voltage cable bonding to prevent cable termination faults based on zero‐sequence current

High‐voltage cable bonding to prevent cable termination faults based on zero‐sequence current

Short‐circuit current difference of parallel strands in winding turns and its influence on the distribution of electromagnetic force

High voltage underground cable bonding optimisation to prevent cable termination faults in mixed high‐voltage lines

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