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Three dimensional grounding grid design. Design considerations of HVDC grounding electrode are discussed in this paper.
Effects of the changes in IEEE Std. 80 on the design and analysis of power system grounding
A strong magnetic field indicates that the grounding grid is in good condition; a weak magnetic field indicates that some damage may exist.
An alternative is to use a homogeneous equivalent soil model, using the Kindermman formula for calculating the average resistivity. Rajesh Kumar Kamal Bansal. The obtained values of resistance are not satisfactory, due to lower segments images that overlap the upper segments.
The adopted value of the C s factor affects the projected safety conditions in the substation and grounding electrode design and its price as well as the moment of possible refurbishment of the existing grounding . This paper presents advances made ieer HVDC grounding design techniques and the DC interference effects generated by HVDC ground electrodes on neighboring metallic utilities, with a particular emphasis on buried pipelines oil, gas, water. Etd final simulation concerns a ground rod that crosses the two layers.
Testing continuity of grounding grid using the AC current injection method. This paper presents a new approach to calculate the surface potentials in a two. Computer aided design of the substation grounding system. Analysis and comparison of calculation results and measurements of dangerous potentials on earthing systems.
Computation and measurement of electrical interference effects in aqueducts due to a nearby parallel As a result, ground impedance measurements Ground resistance calculation of 200 power station in Brunei Darussalam. Power System Technology, This paper presents the matrix method for the calculation of ground resistance in a two layer soil.
Therefore, it would be ideal to have a simple, accurate, analytically obtained formula for the C s factor. The magnetic field generated by the current flowing in the buried grid conductors is then measured above the ground. Abstract Substation grounding is a very important aspect in a substation design which forms a safe grounding grid system besides functioning as a means of dissipating currents to the surrounding ground during normal and fault conditions, also prevents the ground potential rise during a fault from creating dangerous potential gradients on the substation ground surface that can endanger a life of a person in the vicinity of the grounded facility.
Even in the study of the phenomena of ionization, the two layer ground model was used . A realistic case is modeled in detail to The simulations are carried out with the aim to verify the possibility of introducing some practical design criteria helpful for engineering applications. The proposed method is verified using a scaled model of a grounding grid. Two field tests were conducted to demonstrate that the proposed method works effectively in determining the continuity of the grounding grid.
According to the IEEE Std  and its recent revision , grounding of a metal fence which encloses an installation having energized electrical conductors or equipment can be achieved either by connecting the fence to the installation grounding grid or by utilizing a separate grounding configuration.
This study consists, basically, of tables and graphics that shows a series of interesting results and offer a reliable and practical instrument for the grounding systems design.
The experiment in the lab showed that the proposed method works well on testing grounding grid integrity.