THE EFFECT OF MAGNETIC-FIELD ON OPTIMAL-DESIGN OF A RIGID-BUS SUBSTATION

Substation rigid-bus design involves electrical, mechanical, and struc tural considerations. In order to integrate these considerations into one document, IEEE in cooperation with ANSI has issued a comprehensive guide for design of substation rigid-bus systems. The design process based on this guide involves substantial manual effort to integrate al l types of calculations. This is particularly evident when the computa tions have to be repeated several times in order to arrive at a more e conomic design. In an earlier paper we presented a mathematical model and computer program which automates the design process. Recently ther e has been concern expressed about the possible biological effects of low level magnetic fields. In view of this, a new design constraint ta king into account the limits imposed on the magnitude of the magnetic field can be added to the design guidelines. In this paper we introduc e such a constraint and we show how the magnitude of allowable magneti c field at a specified distance from the station buses affects the opt imal design of a rigid bus substation.