Hybrid continuous circuit‐trapezoidal integration method analysis of multi‐cross structure of grounding system

Asadpourahmadchali, Mohammadbagher; Niasati, Mohsen; Alinejad‐Beromi, Yousef

doi:10.1049/iet-smt.2019.0050

Cited by 4 publications

(6 citation statements)

References 41 publications

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“…Fig. 1 shows the electrical parameters between two segments of a grounding system [18]. Electrical equations, excluded from the grounding system and based on Fig.…”

Section: Grounding System Modelingmentioning

confidence: 99%

“…On the other hand, these methods are not suitable for practical applications as they are complicated and time-demanding [15  17]. HCCTIM is the most recent method in analyzing the grounding system, which adopts the continues circuit method and the trapezoidal integration method [18,19]. Electrical parameters are calculated by integration rules.…”

Section: Introductionmentioning

confidence: 99%

“…This paper aims at comparing four common tower grounding structures: counterpoise, crow's foot, square and square with additional wires, modeled using the HCCTIM method proposed in [18]. The validation of this method to model the mentioned structures is verified by the CDEGS software.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of different tower grounding systems using hybrid continuous circuit-trapezoidal integration method

2021

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In order to protect the transmission lines against lightning strikes, it is important to investigate the tower grounding system. In this paper, a recent method called hybrid continuous circuit-trapezoidal integration method is used to calculate the impulse impedance of the grounding system. Moreover, conventional structures of the grounding systems have been simulated and the results show that, with the same wire length, the square with additional wire system has the least impulse impedance as compared to counterpoise, square and crow?s foot. Moreover, the effects of soil resistivity and lightning current rise-time on the impulse impedance of these grounding systems are investigated. It is concluded that the design of the grounding system depends on the geographic location of the site in terms of soil resistivity and isotropic characteristics of the area in terms of lightning current rise-time.

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“…Fig. 1 shows the electrical parameters between two segments of a grounding system [18]. Electrical equations, excluded from the grounding system and based on Fig.…”

Section: Grounding System Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling of different tower grounding systems using hybrid continuous circuit-trapezoidal integration method

2021

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“…Although the grounding resistance of FGCG under the powerfrequency source has advantages, the impulse impedance under the impulse current has not yet drawn relevant conclusions. Asadpourahmadchali et al studied the method of determining the effective angle between different horizontal conductors and optimized the multi-span grounding system according to the number of effective branches and the effective conductor length [21].…”

Section: Introductionmentioning

confidence: 99%

“…Asadpourahmadchali et al. studied the method of determining the effective angle between different horizontal conductors and optimized the multi‐span grounding system according to the number of effective branches and the effective conductor length [21].…”

Section: Introductionmentioning

confidence: 99%

Research on impulse impedance model and protection optimization of transmission tower grounding device in mountainous area

Huang

Zhou

Dong

et al. 2021

IET Science Measure & Tech

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The impulse impedance of the tower is the core parameter to evaluate the lightning protection performance of the transmission line. The high soil resistivity and the underground rock layers in the mountainous areas will induce large impulse impedance and further lead to frequent lightning striking accidents. Therefore, this paper proposes a circuit-finite element model (CFEM) and investigates the corresponding impedance-reduction optimization method of the grounding device in mountainous areas. The model takes into account the nonlinear characteristics of the soil. Based on the parallel-plate electrode and the concentric hemispheric test device, the nonlinear curves of the soil resistivity of five typical kinds of soils with the electric field intensity are obtained. To justify the CFEM, the field experiment of a single horizontal conductor is performed, with an average relative error of 4.67%. Based on the CFEM, this paper presents an impedance-reduction optimization method for the grounding device in the mountainous areas, while proposing the best design method and the optimal layout of the grounding device in the rocky zone. The research results can provide a reference for the design transformation and protection optimization of the transmission tower grounding device in mountainous areas.

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Improving tower grounding vs. insulation level to obtain the desired back-flashover rate for HV transmission lines

Asadpourahmadchali

Niasati

Alinejad‐Beromi

2020

International Journal of Electrical Power & Energy Systems

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Hybrid continuous circuit‐trapezoidal integration method analysis of multi‐cross structure of grounding system

Cited by 4 publications

References 41 publications

Modeling of different tower grounding systems using hybrid continuous circuit-trapezoidal integration method

Modeling of different tower grounding systems using hybrid continuous circuit-trapezoidal integration method

Research on impulse impedance model and protection optimization of transmission tower grounding device in mountainous area

Improving tower grounding vs. insulation level to obtain the desired back-flashover rate for HV transmission lines

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