Design of A New Earth Network for the 60/30 KV SI Mustapha Substation

In this work, we study the sizing of the ground network of the 60/30 kV substation for the transformation and distribution of electrical energy of Si Mustapha. The ground study provides the maximum permissible step (Ep) and contact (Ec) voltages according to IEEE Std 80-2000, as well as the evaluation of the ground surface potential GPR. The ground grid study can determine the values and produce the actual step and contact voltages profiles as well as the equipotential contours of the contact and/or surface voltages in 2D and 3D. The simulation is done by the CYMGRD software, the soil resistivity measurements, were executed by WENNER method using the CHAUVIN Arnoux C. A 6470 at selected points East, North and South of the substation.