2, equation 57 and essentially combines the resistive properties of a metal plate, conductors and the depth at which it is buried.
The equation is based on the IEEE Guide for Safety in AC Substation Grounding (IEEE Std 80-2013), section 14. See Full PDF Download PDF.
The CYMGRD software is a substation grounding grid design and analysis program specially developed to help engineers optimize the design of new grids and reinforce existing grids, of any shape, by virtue of easy to use, built-in danger point evaluation facilities. Calculation of maximum permissible touch and step voltages. Nov 27, 2007 To determine the split (current division) factor (S f), three methods are suggested a) Simplified graphical method or impedance calc from Annex C IEEE Std 80-2000.
The Ground Grid Systems module enables engineers to quickly and accurately design and analyze ground protection. It also uses 30 percent less grounding grid material. The design is based on constracting an auxiliary annular grounding grid and transforming the lightning current.
2. In the Calculation section,.
November 2006 &183; Conference Record - IAS Annual Meeting (IEEE Industry Applications Society) Massimo Mitolo.
Danger point evaluation.
. The auxiliary anode grounding grid design and the transfer corrosion current design can better prevent the main grounding grid from corrosion.
3D analysis of voltages.
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. The equation is based on the IEEE Guide for Safety in AC Substation Grounding (IEEE Std 80-2013), section 14. Outcome of load flow study. In last past years the design engineers follows steps of grounding grid design as per IEEE standard 80-2013, which is complicated process. . The two methods are used differently to determine the ground grid mesh parameters, step & touch voltages, horizontal and vertical number of conductors, vertical numbers of rods, and final.
The paper presents graphical data for the calculation of.
These depths are approximate and vary with design standards of various electric utilities. This chapter illustrates a design data for ground grid example from IEEE standard 80.
When the substation has a lightning accident or an internal fault of the power system, the grounding grid can provide a low impedance path to high current 1.