Improving the lightning performance of distribution lines using high CFO structures

Paulino, José Osvaldo Saldanha; Barbosa, Célio Fonseca; Lopes, Ivan J. S.; Boaventura, Wallace C.; Cardoso, E.N.; Ávila, Afonso F.; Guimarães, Maurissone F.

doi:10.1016/j.epsr.2021.107063

Cited by 3 publications

(4 citation statements)

References 15 publications

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“…Distribution lines have the characteristics of wide geographical distribution, complex geographical environment and changeable climate, so it is need to comprehensively obtain the information of equipment, environment, wires, towers and other equipment through IOT technology for comprehensive processing and judgment. Comprehensive information perception provides the basis for all-round monitoring and intelligent management of distribution lines 13 . With the growth of society, people's demand for electricity is increasing gradually.…”

Section: Methodology 21 Smart Grid Characteristicsmentioning

confidence: 99%

“…As an important part of the DMS, the operation state of distribution lines is related to the operation safety of the DMS. With the growth of the national economy, the demand for electricity is rising, and the scale of the DMS is gradually expanding, so it is more and more difficult to patrol the distribution lines and take safety precautions 1 . Because of its wide distribution range, distribution lines are often threatened by various complex geographical and climatic environments, which makes the fault of distribution lines always one of the most important factors affecting the safe operation of DMSs 2 .…”

Section: Introductionmentioning

confidence: 99%

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Design of lightning monitoring and fault identification algorithm for overhead distribution lines based on Internet of Things

Li,

He,

Xiao

et al. 2023

Seventh International Conference on Mechatronics and Intelligent Robotics (ICMIR 2023)

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As an important part of the (DMS), the operation state of distribution lines is related to the operation safety of the DMS. Lightning is a natural transient weather phenomenon with high voltage, high current and strong electromagnetic radiation in nature, and it is also one of the more common natural disasters, which has become the primary factor of distribution line tripping. In this article, an algorithm for lightning monitoring and fault identification of overhead distribution lines based on the Internet of Things (IOT) is proposed. According to the distribution characteristics of wavelet energy spectrum under different lightning strikes, the response characteristics and fault identification criteria are constructed. The simulation results verify the real-time and reliability of the online monitoring data transmission of the lightning monitoring system for overhead distribution lines. The method in this article can avoid the influence of lightning impact corona and reflected wave at the end of the line on the accuracy of the algorithm by reasonably selecting the judgment threshold and the monitoring point of current traveling wave, which has high practical value. Through the statistical analysis of various monitoring data of the system, the operation and management department of distribution line can grasp the changes of key operation state of the line in time and lay a solid foundation for the condition maintenance of distribution line.

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Section: Methodology 21 Smart Grid Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of lightning monitoring and fault identification algorithm for overhead distribution lines based on Internet of Things

Li,

He,

Xiao

et al. 2023

Seventh International Conference on Mechatronics and Intelligent Robotics (ICMIR 2023)

View full text Add to dashboard Cite

show abstract

“…erefore, 24 kV distribution lines should be equipped with some form of lightning protection. Many methods to decrease the disruption of distribution lines from lightning strikes to the system have been developed, and many variations in lightning protection have been presented in literature [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. For example, Yokoyama [2] indicated that there are many power failures due to lightning overvoltages that occur on the coast and in the mountainous areas of Japan.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, in another study, the voltage induced by a lightning current was reduced using two OHGWs below and above the phase conductor [6]. Paulino et al [7] showed improvements in lightning protection by increasing the dielectric strength from 95 kV to 170 kV based on the variation of the ground resistivity in the simulations. Additionally, the lightning protection of 95 kV and 170 kV insulation systems was evaluated in a real environment.…”

Section: Introductionmentioning

confidence: 99%

Lightning Protection Improvement and Economic Evaluation of Thailand’s 24 kV Distribution Line Based on Difference in Grounding Distance of Overhead Ground Wire

Sestasombut

Ngaopitakkul

2021

Mathematical Problems in Engineering

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This study determines the voltage across insulators after a direct lightning strike to an overhead ground wire on a 24 kV pole structure for different grounding distances of overhead ground wire, to calculate the maximum ground resistance required to avoid disruption of the distribution line system using ATP-EMTP software. The results show that when a 40 kA lightning current, the average lightning current in Thailand, strikes a 24 kV pole structure, the maximum ground resistance should not exceed 4 Ω for a 40 m grounding distance of overhead ground wire, based on an existing critical insulator flashover of 205 kV. However, because the average ground resistance in Thailand is approximately 10 Ω, this study proposes increasing the insulation level from 205 kV to 300 kV to reduce the likelihood of power outage. The cost-effectiveness of such an investment is assessed in terms of net present value (NPV), internal rate of return (IRR), profitability index (PI), and discounted payback period (DPP) using existing economic tools. Results show that when the critical insulator flashover is increased from 205 kV to 300 kV for a 40 m grounding distance of overhead ground wire, the project is likely to have a DPP of 15.12 years, NPV of 143,321.87 USD, IRR of 12%, and PI of 1.15. On the other hand, grounding distances greater than 40 m for overhead ground wire result in negative NPV, although the back flashover rate can be reduced by 1.51–5.71% with grounding distances of 80–200 m compared to the situation in the absence of grounding.

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Mitigation of Insulator Lightning-Induced Voltages by Installing Parallel Low-Voltage Surge Arresters

2023

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In this paper, we propose a mitigation method for reducing lightning-induced insulator voltages based on the installation of low-voltage surge arresters aligned parallelly to the insulator. The three-dimensional finite-difference time-domain (FDTD) method is applied to numerically model a real surge arrester residual voltage evaluation system. The application of a transient current pulse, typical of lightning discharges, is considered in our numerical model. We considered cases with one or two surge arresters installed per phase, in three different geometric and parametric configurations for installing distribution surge arresters. In addition to the Kirchhoff current division, which reduces both the absorbed energy and the thermal stress, the results associated with the installation of two surge arresters parallelly aligned to the insulator show that the interaction of magnetic fields generated by the surge arresters’ currents can produce an additional strong reduction in lightning-induced voltage over the insulator, as presented in this paper. Conditions for maximum voltage reduction are also identified. A brief cost-effectiveness analysis is also provided.

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Improving the lightning performance of distribution lines using high CFO structures

Cited by 3 publications

References 15 publications

Design of lightning monitoring and fault identification algorithm for overhead distribution lines based on Internet of Things

Design of lightning monitoring and fault identification algorithm for overhead distribution lines based on Internet of Things

Lightning Protection Improvement and Economic Evaluation of Thailand’s 24 kV Distribution Line Based on Difference in Grounding Distance of Overhead Ground Wire

Mitigation of Insulator Lightning-Induced Voltages by Installing Parallel Low-Voltage Surge Arresters

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