The Similarity of the Action of Franklin and ESE Lightning Rods under Natural Conditions

Cooray, Vernon

doi:10.20944/preprints201805.0429.v1

Cited by 4 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(d) Additionally, the proposed NPAP is promising for potential applications involving lightning rods [11]- [13], [46], surge arresters with parallel gaps [47], and other similar devices [48]- [51].…”

Section: Discussionmentioning

confidence: 99%

“…The literature [12] has also provided a novel experimental technique with which to prove the effectiveness of an early streamer emission air terminal versus a traditional Franklin rod in a laboratory, and researchers have found that the peak value of active rod charge is almost twice as high as that of the charge of a conventional Franklin rod, and that the induction element plays a significant role in the development of this phenomenon. Previous literature [13] has also compared the similarity of the action of conventional and ESE lightning rods under natural conditions, and the conclusion suggests that there should be no obvious difference between ESE and conventional lightning rods. However, the main differences between the early streamer emission method and the proposed PFA guiding method lie in their applications, working scenarios, and conditions.…”

Section: Introductionmentioning

confidence: 99%

“…This PFA guiding method is like the early streamer emission lightning rod, whereby a streamer is generated before lightning occurs, thus enabling the lightning to be more attracted than by conventional lightning rods [11]- [13]. Previous literature [11] has proposed some explanations and ideas on the early streamer emission (ESE).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Comparative Study of Power Frequency Arcs Influenced by Negative-Polarity Artificial Pulses

Luo

Wang

et al. 2022

IEEE Access

View full text Add to dashboard Cite

In this paper, we propose a method to guide power frequency arcs (PFAs) and investigate the electric potential and temperature characteristics of PFAs when a negative-polarity artificial pulse (NPAP) is applied from an artificial pulse generator. Based on a two-dimensional finite-element geometrical simulation model, we acquire and analyze numerical simulation results for the electric-potential and temperature distributions in the presence and absence of NPAPs. The simulation results indicate that the NPAPs accelerate the air ionization and streamer breakdown processes, which physically affects the electric potential and temperature distributions. In addition, to determine how the NPAPs affect the PFA discharge process, we qualitatively compare the arc plasma-coupling simulation results, which suggest that the NPAPs either modify the path of the PFA or change the discharge characteristics. Moreover, we use a PFA generator to experimentally investigate the PFA voltage. These experiments enable direct observation of the PFA path produced by NPAP guides. Finally, the simulation and experimental results demonstrate that the NPAPs provide innovative, simple, and cost-effective improvements in the efficiency of arc-extinguishing devices. This technique is suitable for use with arc-extinguishing devices and has significant prospects for applications in other fields. INDEX TERMSArtificial pulse generator, electric potential, negative polarity artificial pulses, arc plasmacoupling simulation, power frequency arc.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Comparative Study of Power Frequency Arcs Influenced by Negative-Polarity Artificial Pulses

Luo

Wang

et al. 2022

IEEE Access

View full text Add to dashboard Cite

show abstract

“…-A high voltage pulses that are being generated at the tip of the ESE lightning rods will be produced by a stepped leader at any standard Franklin rod. Because of that ESE rods have the same protection radius as the standard Franklin rods [15].…”

Section: Criticism Of the Eseatsmentioning

confidence: 99%

Early Streamer Emission Vs Conventional Lightning Protection Systems

Banjanin

2019

B&H Electrical Engineering

View full text Add to dashboard Cite

This paper analyses and compares the conventional lightning protection systems proposed in IEC 62305 to the lightning protection systems based on the application of early streamer emission lightning rods proposed in NF C 17-102. Comparison between the two approaches to the lightning protection of structures was presented, both from a technical and economic point of view. Some inconsistencies in the conventional air termination system design methods are pointed out. The critical attitude of the scientific community regarding the declared protection characteristics of the early streamer emission lightning rods is discussed.

show abstract

Electric Field Analysis on the Corona Discharge Phenomenon According to the Variable Air Space between the Ionizer and Ground Current Collector

Jang

Seo

Kim

2023

ASI

View full text Add to dashboard Cite

In this paper, we present the optimized air space of the lightning protection rod (SK-AOR380) with the function of a charge transfer system (CTS). For evaluation of CTS in the laboratory setting, some studies have focused on the modification of the structure and shape of the CTS; the air space is designed (>2 mm) as an empirical design without quantitative data. However, in this paper, we have focused on the air space between the ionizer conductor and current collector to control the inception and occurrence position of corona discharge in air insulation. This is because the performance, such as the initial corona discharge inception of CTS, is determined by the air space. The simulation analysis was performed in a narrow, micro-sized air space as a first step, where the air space was reduced to the extent possible for simulation. To evaluate the performance of SK-AOR380 according to the narrow air space, we considered the numerical analysis method. The fundamental equations consist of Poisson’s equation and the charge continuity equation. Poisson’s equation for electric fields is a fully coupled numerical model based on the charge continuity equations for a positively charged ion, negatively charged ion, and free electron. Fowler–Nordheim electron emission was employed for the boundary condition at the surface of the ionizer conductor. To simulate the corona discharge behavior under standard lightning impulse voltage, we used a source of lightning voltage with 1.2/50 μs based on a double exponential equation; the corona discharge behaviors (electric field distribution, free electron density, positive and negative ion density) were investigated dependent on each time step (0.5, 1 and 1.2 μs) until 3.5 μs. The results revealed that the characteristics graph of free electron density, positive and negative ion density showed similar trends, with lightning impulse voltage increasing with increasing time steps until 1.2 μs and each density resulted in a decreasing trend from 1.2 μs to 3.5 μs. The SK-AOR380 is improved with a decreasing air space in terms of electric field distribution, electron, and ion density. In other words, the 0.0005 mm air space created a non-uniform electric field distribution with a large field enhancement, causing ionization to initiate corona discharge. In addition, in the case of a 0.0005 mm air space, the electric field and electron density are increased by 1.3 and 1.9 times, respectively, than that of 0.001 mm. However, there was no longer a significant difference under 0.0005 mm in the simulation results. To improve the CTS, we suggest the air space between the ionizer conductor and current collector should be less than 2 mm than that of conventional CTS from our research work.

show abstract

The Similarity of the Action of Franklin and ESE Lightning Rods under Natural Conditions

Cited by 4 publications

References 14 publications

A Comparative Study of Power Frequency Arcs Influenced by Negative-Polarity Artificial Pulses

A Comparative Study of Power Frequency Arcs Influenced by Negative-Polarity Artificial Pulses

Early Streamer Emission Vs Conventional Lightning Protection Systems

Electric Field Analysis on the Corona Discharge Phenomenon According to the Variable Air Space between the Ionizer and Ground Current Collector

Contact Info

Product

Resources

About