MPPTCL is an Indian state utility in Madhya Pradesh situated in central part of India
The substations in the state is divided into three circles, Indore, Bhopal or Jabalpur. The control center are located in each circle. The substation RTU system will send the data to the respective remote control center. The communication from substation RTU system to the remote system is by means of wireless 4G GPRS modem.
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 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.
Each substation comprises of a minimum of 200 DI, 25 DO and 25 AI, the number of DI-DO-AI in the RTU, depends on the bay voltage level and no. of bays in the substation.
The local SCADA shows online status of the substation by means of SLD screen shown in the iControl SCADA. There are also Voltage 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, protection status and metering details.