TANTRANSCO is an Indian state utility in Tamilnadusituated in southern part of India
The RTU based solution is with hardwire connection between the switch gear equipment and RTU Digital inputs (DI), Digital outputs (DO) and analog inputs (AI) cards. The RTU system also collects the data from the protection relays and energy meters.
The substation RTU system will send the data to the remote control center. The communication from substation RTU system to the remote system is by IEC60-870-104 protocol means of optical ground wire (OPGW).
The protection status, alarms, events are collected from the IEC61850 relays. Modbus communication is used to communicate and collect the data from energy meters. The iGrid iGW gateway in the substation is collecting the relay and meter information. The gateway also synchronises the time from GPS (Global positioning system) system.
The local SCADA system (iGrid iControl) is installed in the substation computer. The SCADA system is used to display the RTU DI, DI and AI status along with relay and meter information. The SCADA feature of Automatic line colouring (ALC) enables to monitor the status of communication system in the RTU system architecture.
The local SCADA shows online status of the substation by means of SLD screen shown in the iControl SCADA. There are also bay wise screens, individual bay screens, metering information screen and architecture screen shown in the SCADA.These screen displays the information of the switch gear equipment and metering details.