Use of satellite communications for utility scada systems

摘要

Supervisory Control and Data Acquisition (SCADA) systems have been used by utilities for many years to monitor and control transmission and distribution systems.The information collected at the substations includes analog readings (such as voltage,current,watts,and VARs) and digital readings (such as breaker position and security alarms).In addition,the central control cener is also able to exercise control through commands (such as open breaker,close breaker or disable automatic reclose).These systems furnish this information every few seconds to a SCADA master for display of the data and remote control operations.