Under normal conditions, electrical power systems will satisfactorily deliver power with the need of
proper grounding. Grounding is very important for the generation, transmission and distribution systems of
electrical power. Grounding creates stability for the electrical networks; the neutral grounding is useful in
discharging over-voltages due to lightning to the earth, grounding is used in simplified design of earth fault
protection, the grounded systems require relatively lower insulation levels as compared with underground and
finally the most important reason is to protect people. Grounding system may be steel, copper or other
materials, these materials prone to corrode. This study is specifically concerned with the effect of corrosion on
steel grounding grid and methods to compensate the gird and surrounding metallic rods which are subjected to
corrosion. Also this paper introduces the design of a cathodic protection of electrical substation grounding
system in which a steel ground grid and rods are used instead of copper. |
