Load Despatching Facilities in India SLDC AP WRLDC NLDC Main NRLDC Sub LDC CSub LDC W VSAT Commn PG FO Comn Sub LDC V NLDC Backup SRLDCERLDCNERLDC SLDC KARSLDC ASSLDC TR 10 Sec 2 Sec 10 Sec New Delhi Katwariasarai Kalcutta Golf Course Road ULDC Commn RTU CRTU X RTU A RTU X KPTCL ABB RTU A 31 SLDCs, 5 RLDCs, 1+1 NLDC Wideband speech and data communication Common database in SLDC/RLDC

Energy Management System-EMS Mainly responsible for Data acquisition and monitoring Geographically larger area under monitoring Communication medium is combination of wide band and PLCC (Cycle time 10 sec) SLDC RLDC and NLDC are having EMS functions (Emphasis on grid conditions) SCADA is an integral part of EMS Distributed reporting on P2P for data acquisition - IEC Limited control features

EMS/SCADA Approach REQUIREMETS  LRGACY SYSTEM  NEW TECHNOLOGY

SUPERVISORY CONTROL AND DATA ACQUISITION Progress in Development  Programmable Logic Controller – Simple wiring  Distributed Control System – RS232 / RS485 interface  Supervisory Control – IEC and others – Ruled the SCADA for quite some time  Intelligent Electronic Device – IEC – Complete elimination of C&R panel by computer system  Common Information Model architecture  Wide Area Measurement

EMS/SCADA Discussion Items  RTU Data acquisition  SAS Data Acquisition  PMU Data Acquisition  CIM Implementation  Cyber Security Implementation