Substation Control Systems ( SCS)

The substation control system is compelete system by which all the events , measurements operation and control of the substation is achieved from the local PC as well as the Remote control centre . The following are the main application of the SCS
1. Setting the Relay from the Local PC as well as the Remote Control center
2. Viewing the different events in the relay like operation of a an element of a relay , Starting of an elemnt of a relay etc
3. Disturbance viewing of the relays
4. Giving different alarms and the status of the Relay itself
5. Recording the events like operation of CB isolator etc with time stamp
6. Contol of the CB and Isolatores from the local PC as well as the Remote Pc
7. Operation of the On load tap changers of the Power transformers
8. measurement of current voltage , frequency.Active Power reactive Power etc of each feedres and Transformers
9. Other informations like transformer monitoring system etc can be sent to the control center
10 All other substation alarms and events general in nature like temperature , Fire systems and so on . The list goes on ..
SCS is improved version of Substation SCADA . Apart from the measuremnts and control which was done in the SCADA using the transducer and RTU systems ,the latest substation control systems are using the IEC 61850 protocol for the substation relay communication and IEC 104 protocol between the substation and the Control centre . The essential components of a substation control System may be as follows .

1. A station Server loaded with the Application software
2. Communication swiches for interfacing the Relays and other external agents to the station server
3. A monotor for viewing the station configuration and controlling the operation
4. A gateway for the communication of the station server with the Remote control centre
5. May be a GPS system for time syncronistation
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to be continued...