The most appropriate communication technologies available
for EMS/SCADA Distribution Dispatching Center Projects are
therefore considered to be in priority order:
1) Fiber optic cable (ADSS) from the System Master Control
Center to each of the Area Distribution Dispatch Centers
(if applicable) and to substations on the fiber optic
cable route.
2) Microwave or Time Division Multiple Address (TDMA)
from the Area Distribution Dispatch Centers to selected
substations.
3) Multiple Address Radio System (MARS) and UHF P-T-P
radio in the 450/900 MHz band to remote substations and
remote controlled line switches. Some leased circuits for
SCADA communication to very remote substations.
4) Satellite from the System Master Control Center (SMC)
to each of the ADDCs (if applicable).
5) Metallic cable for local/In-building application.
The most appropriate communication technologies available
for EMS/SCADA Main Grid Dispatching Center Projects are
similar to those listed above except as follows:
1) Fiber optic cable (OPGW/Wrapped/ADSS) from the
System Master Control Center to each of the Area
Distribution Dispatch Centers (if applicable) and to all
major substations.
2) Digital Microwave (SDH/SONET or PDH) from the
System Master Control Center to each of the Area
Distribution Dispatch Centers (if applicable) and to all
major substations.
3) MARS and UHF PTP radio in the 900 MHz band to remote
substations.
4) Not Applicable.
5) Not Applicable.
6) Metallic cable for local/In-building application.