Investigation of ground impedance measurement techniques up to 1 MHz frequency in urban dense power substations

This paper aims to study the ground impedance measurement on the mesh network of power. Generally, the ground and its connections are modeled using an impedance consisting of resistance, capacitor, and inductor. The junction point resistance resulting from the specific resistance of the junction poi...

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Bibliographic Details
Published in:Electrical engineering 2022-12, Vol.104 (6), p.4595-4604
Main Authors: Talebzadeh, Mohammad, Setayeshmehr, Alireza, Barati, Hassan
Format: Article
Language:English
Subjects:
Copper wire
Economics and Management
Electrical Engineering
Electrical Machines and Networks
Electricity substations
Energy Policy
Engineering
Finite element method
Impedance measurement
Measurement techniques
Original Paper
Power Electronics
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Summary:This paper aims to study the ground impedance measurement on the mesh network of power. Generally, the ground and its connections are modeled using an impedance consisting of resistance, capacitor, and inductor. The junction point resistance resulting from the specific resistance of the junction point to the ground is applied in the studies related to the power network. The values of capacitance and inductive capacity are also considered in the studies relating to high frequencies, lightning, and switching. First, the electric model of the soil is determined, and then the electric model of meshed networks connected by copper wires is modeled. Finally, the electric model of grounded electrodes is also acquired in various points of the ground network. All the simulations are performed using MATLAB/Simulink. The measurements are taken practically and compared at Payam power substation, Dezful, through various approaches. The step and touch voltages are also measured using various techniques considering the necessity for the safety of equipment and staff of the power substation.
ISSN:0948-7921
1432-0487
DOI:10.1007/s00202-022-01644-y