Modelling and Analysis of Currents Flowing in High Voltage Power Substations During Ground Short - Circuits

Gajdzica, Jakub; Nowak, W.; Szpyra, Waldemar; Tarko, R.

doi:10.1109/wzee.2018.8748957

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…[24][25][26] present an analytical formulation to compute the reduction factor in global earthing systems (GESs). A method based on EMTP-ATP program has been presented in [27] to determine the value of currents flowing into substations grounding. The application of the multi-conductor method has been described in [28] to compute fault current distribution on transmission lines.…”

Section: Introductionmentioning

confidence: 99%

A Simplified Approach to Calculate the Earth Fault Current Division Factor Passing Through the Substation Grounding System

Saeednia

Ramezani

2022

Scientia Iranica

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The main aim of designing a safe grounding system is to provide a low impedance path to the flow of the earth fault currents without exceeding the operational constraints and equipment limits that will ensure electrical continuity. One of the most significant and well-known parameters to design a safe grounding system in power systems is the exact determination of the maximum earth fault current division factor. This paper presents a simplified and accurate method to calculate the earth fault current division factor in different states of the earth fault occurrence within and the vicinity of the substation under study. In the proposed method, a hybrid overhead-cable line, the impact of the frozen soil, mutual coupling between phase conductors and guard wires, grounding system resistance of adjacent substations, different tower footing resistances, the impact of the phase conductor impedance, and different spans in transmission lines can be considered. In addition, a closed-form formulation is also developed for the occurrence of the earth fault on the transmission line. Finally, details of the analysis results of this study have been compared with other methods in the literature. The validity and accuracy of the proposed approach also have been assayed and confirmed in details.

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Section: Introductionmentioning

confidence: 99%

A Simplified Approach to Calculate the Earth Fault Current Division Factor Passing Through the Substation Grounding System

Saeednia

Ramezani

2022

Scientia Iranica

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Comparative Analysis of High-Voltage Power Line Models for Determining Short-Circuit Currents in Towers Earthing Systems

et al. 2021

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The article deals with the problems of single-phase short-circuit current distribution in overhead power lines. Short-circuit disturbances cause many negative phenomena in power networks. Since experimental studies of short-circuits in real networks are practically impossible to perform, these effects can be evaluated only theoretically, based on short-circuit current calculations with the use of appropriate mathematical models. Although short-circuit modeling is considered to be one of the simplest power system calculations, the exact mathematical description of the phenomena occurring at short-circuits is complex. Simplified normative methods are often used for short-circuit current calculations; however, this does not give ground for a thorough analysis of short-circuit current distribution in power lines. The distributions are analyzed using power line models with different degrees of complexity in line with the assumptions made for a given model. The paper presents the problem of current distribution analysis in high-voltage overhead lines for single-phase faults to the tower structures. Simulation studies were conducted on the models developed for the calculation of short-circuit currents in the high-voltage power line earthing. The objective of the analysis was to assess the validity of simplification assumptions followed by practical recommendations on the applicability of the models.

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Modelling and Analysis of Currents Flowing in High Voltage Power Substations During Ground Short - Circuits

Cited by 2 publications

References 3 publications

A Simplified Approach to Calculate the Earth Fault Current Division Factor Passing Through the Substation Grounding System

A Simplified Approach to Calculate the Earth Fault Current Division Factor Passing Through the Substation Grounding System

Comparative Analysis of High-Voltage Power Line Models for Determining Short-Circuit Currents in Towers Earthing Systems

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