Instrumentation and control in EHV substations

This paper reports technical findings and recommendations resulting from a joint SCE/TRW study of Instrumentation and Control alternatives for use in future EHV substations on the Edison system. It contains analyses and design criteria that should be followed when a digital, computer-oriented, instrumentation and control system is contemplated as the primary instrumentation and control system in an EHV substation. Attention is also given to the electromagnetic environment found in EHV substations.