Assessment and analysis of indirect lightning performance of overhead lines

Paulino, José Osvaldo Saldanha; Barbosa, Célio Fonseca; Lopes, Ivan J. S.; Boaventura, Wallace C.

doi:10.1016/j.epsr.2014.07.016

Cited by 35 publications

(10 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is supported by an investigation carried out by Paulino et al [3], which showed that the contribution of subsequent strokes is negligible when compared with the contribution of first strokes. The investigation reported in [3] was based on the simple flashover criterion based on the LIV peak value [24].…”

Section: Discussionmentioning

confidence: 62%

“…The current peak value and fronttime follow the probabilistic distribution proposed in [15], with 0.47 correlation coefficient. The 120-m/μs return stroke velocity used is a representative value for indirect lightning flashover assessment [3].…”

Section: Probabilistic Analysismentioning

confidence: 99%

“…The main difficulty in evaluating the effect of LIV waveforms on the flashover rate of aerial distribution lines is the extremely high number of simulations that is required to obtain stable results. For instance, the evaluations considering only the LIV peak values reported by Paulino et al [3] used 1 000 000 simulations for each case. If the waveform is to be calculated and, for each waveform, the response of the line insulation has to be evaluated, the processing time becomes prohibitively high.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Indirect Lightning Performance of Aerial Distribution Lines Considering the Induced-Voltage Waveform

Paulino

Barbosa

Lopes

et al. 2015

IEEE Trans. Electromagn. Compat.

View full text Add to dashboard Cite

This paper shows that the wave-shape parameters of lightning-induced voltages (front-time and time-to-half value) are influenced by the ground resistivity, the line length, and the distance between the flash and the line. In general, these parameters increase with the ground resistivity, the line length, and the distance from the flash. The probabilistic distribution of the waveshape parameters are presented, considering different values of line length and ground resistivity. The effect of the induced voltage waveform on the indirect lightning performance of aerial distribution lines is evaluated using the disruptive effect (DE) method as a flashover criterion. The resulting flashover rates differ significantly from those obtained when only the peak value is used as flashover criterion. The use of a correction factor to multiply the line critical flashover when using the peak value as a flashover criterion is investigated.

show abstract

Section: Discussionmentioning

confidence: 62%

Section: Probabilistic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Indirect Lightning Performance of Aerial Distribution Lines Considering the Induced-Voltage Waveform

Paulino

Barbosa

Lopes

et al. 2015

IEEE Trans. Electromagn. Compat.

View full text Add to dashboard Cite

show abstract

“…Assuming the impact area of Fig. 1, Monte Carlo simulation can be summarized as: 1) generating random values of lightning flash parameters and coordination of the first stroke lightning stepped leader (x, y) on the impact area; 2) application of an Electro-geometric model (EGM) to determine termination point of impact of each lightning stroke; assuming that the subsequent strokes follow the same path of the first stroke [23]; 3) estimating the overvoltages generated by the lightning strokes, depending on the termination point of impact; 4) calculating the insulation failure risk. The overall process of the proposed method is presented in Fig.…”

Section: Failure Risk Analysismentioning

confidence: 99%

Probabilistic Assessment of Lightning Related Risk of Transmission Lines Based on Frequency Dependent Modeling of Tower-Footing Grounding System

Gholinejhad¹,

Shariatinasab²,

Sheshyekani³

2018

AEM

View full text Add to dashboard Cite

This paper presents a probabilistic evaluation, based on Monte-Carlo method, for the estimation of insulation risk of failure of overhead transmission lines (TLs). The proposed method takes into account the wide-band model of towerfooting grounding system. The wide-band model of grounding system in frequency domain is obtained by the method of moment solution to the governing electrical field integral equations. The electrical parameters of soil are considered to be either constant or frequency dependent. The time-domain representation of the grounding system is inferred through pole-zero characterization of its associated frequency response. The case of a typical 400-kV transmission line is modelled in EMTP_RV with the towerfooting grounding system integrated with the transmission line (TL) system. The results of the paper show that the failure risk of transmission lines is affected by the grounding system model. This effect is more pronounced when the soil electrical parameters are assumed to be frequency dependent.

show abstract

“…The time step used in this Section is 10 ns, as a reduction to 5 ns caused negligible variation in the results. The calculation is carried out in three steps: (i) compute the E H (k) file from Equation (4); (ii) compute the α(k) file from (1), adding the contribution of the four current components as per Equation (15) and Table 1 or Table 2; (iii) compute E(k) with Equation (18). Alternatively, any convolution tool available in commercial software could be used in this step.…”

Section: Horizontal Electric Field Calculationmentioning

confidence: 99%

Horizontal Electric Field in the Vicinity of Structures Hit by Lightning

Barbosa

2016

Atmosphere

View full text Add to dashboard Cite

Abstract:The horizontal electric field at the ground surface in the vicinity of structures hit by lightning flashes is relevant to the safety of human beings and livestock; it determines the touch and step voltages around the structure. This paper uses an approximate analytical formula for calculating the horizontal electric field, which was adapted to take into account the effect of the structure foundation. The input for the calculation is the current waveform at the base of the structure, and the results agree well with those obtained by other authors using the finite-difference time-domain (FDTD) method. The approximate formula is applied to calculate touch and step voltages in the vicinity of a structure and the results show that the use of the direct current (DC) approximation to calculate touch and step voltages may lead to significant errors; especially for fast-rising currents and relatively good-conducting soils. This means that DC approximation could be used for positive first stroke and poor-conducting ground (ρ ≥ 1000 Ω·m), but cannot be used for subsequent strokes and good-conducting ground (ρ ≤ 100 Ω·m). Moreover, step voltages differ more from the DC approximation than the touch voltages.

show abstract

Assessment and analysis of indirect lightning performance of overhead lines

Cited by 35 publications

References 22 publications

Indirect Lightning Performance of Aerial Distribution Lines Considering the Induced-Voltage Waveform

Indirect Lightning Performance of Aerial Distribution Lines Considering the Induced-Voltage Waveform

Probabilistic Assessment of Lightning Related Risk of Transmission Lines Based on Frequency Dependent Modeling of Tower-Footing Grounding System

Horizontal Electric Field in the Vicinity of Structures Hit by Lightning

Contact Info

Product

Resources

About