Information Technology Reference
In-Depth Information
The graph, in Fig. 17, highlights the behavior of the induced voltage in a distribution
system, considering an optimized grounding system and using those same lightning data
used for obtaining the results illustrated in Fig. 16. Depending on the optimization of the
grounding system, there is a reduction of the peak value of induced voltage, which is now
approximately 35 kV.
Besides reduction of four times to the peak value, it is possible to verify that the duration of
this electromagnetic event was less than that situation characterized by non-optimized
grounding system.
time (s)
Fig. 17. Behavior of induced voltages for an optimized grounding system.
The expert system for optimizing new designs of grounding systems, called B-TERRA, uses,
to start its calculations, the feeders database, which contains structural information, as well
as information on lightning that occurred in the analyzed region.
While the database, with information about the feeders, are loaded, the operator can
contemplate the evolution of the analysis of lightning, as illustrated in Fig. 18.
The procedures performed by the B-TERRA software allow the identification of the area of
influence of lightning on the devices registered in the database of EDP Bandeirante circuits,
as indicated by a rectangle highlighted in Fig. 19.
In this figure, it is possible to see an example where the device 2047568 is selected and,
consequently, the area of influence of lightning has been highlighted on the screen at the
right side of the B-TERRA software.
