Ground Grid Preliminary Design

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Ground Grid Preliminary Design
1010603Ground Grid Preliminary Design
Background To make the substation yard a safe place for human, established design practice is to keep the voltage gradients that a person may experience below the tolerable touch and step voltages. This gradient control is accomplished by a grid of buried metal conductors over the entire substation yard. Often, the grid is extended beyond the substation fence 1 meter (m) or more. The grid consists of bare copper (rarely is other metal used) cables buried horizontally and shallow to form a network of square or rectangle meshes with cables bonded together at each intersection. Vertically oriented grounding rods are frequently connected at some of…
Orlando N. Acosta, MSEE: Power Plant Stability, Capacitors, and Grounding: Numerical Solutions. Ground Grid Preliminary Design, Chapter (McGraw-Hill Professional, 2012), AccessEngineering Export