S74802-NANANA Electrical Energy Totalization Function

S74802-NANANA automation system consists of five parts: master station, remote terminal units (re mote terminal units, RTU), line sensors, remote control SF6 or vacuum switches, communication cables. Among them, RTU devices are located at the substation site, which can automatically collect various switch status quantities (telecommunication) and analog quantities (telemetry) and transfer them to the main station system of the monitoring center through a special channel; some RTUs can also perform specific remote control operations according to the intention and instructions of the monitoring personnel and return the results of the operations to the main station system of the monitoring center.

S74802-NANANA From the point of view of the functions that can be realized by the RTU of the substation, the automation of the substation includes three aspects: telecommunication, telemetry and remote control. In addition, some systems can also realize the total addition of electric energy according to the results of telemetry. Accordingly, substation automation system can be divided into two categories: one category only realizes the functions of telecommunication and telemetry, i.e. traditional SCADA system; while the latest SCADA system belongs to the other category, which is supposed to be able to realize all the functions of the “three remoteness”. These two types of systems correspond to different stages and levels of power system automation.