Emergency Manual Load Shedding and Peak Load Reduction ...

Appendix 4OO 6T-29Effective Date: 02 July 2014Page 10 of 13EMLS – Southern Interior Area1.0 EMERGENCY MANUAL LOAD SHEDDING BLOCKSManual load shedding may require up to 50% of the area load to be shed in 3 blocks within 5 minutes.The shedding described in the table is in order of priority within each block. The SI West area peakload approximately 770 MW and the SI East Area peak load is approximately 160 MW.If under frequency load shedding has occurred, some of the loads may already have been shed.Voltage should be monitored frequently while load is being shed. At the direction of the TC, circuitsshould be cut out as necessary to control the voltage.Once load shedding complete, switching should commence to restore station service to affectedstations.EMLSBlockAffected Circuits/Stations Device Approx.MW Load1 1L219 - KWD (28 MW) VVW 1CB2, 1CB10 28DUG 1CB6(KWD load may be offset by generation.Shedding is only required if KWD is importing)60L288 – EV1 NTL 60CB15 2360L287 – CFE ELK 60CB5 5Total: 562 1L55 - HVC/STL/LLD HLD 1CB3, 1CB4 1001L244 – WBK NIC 1CB15, 1CB16 7560L28460L29860L299 – JOE/SPL/MYECBK 60CB7, 60CB8KBY 60CB4CBK 60CB5, 60CB651Total: 2263 DUG T1, T3 and T4 25 kV Feeders DUG 25CB1, 2, 4 & 1107BKL T1 and T3 25 kV Feeders BKL 25CB1, 25CB3 66VNT T5, T6 25 kV Feeders VNT 25CB6, 5 & 8 5560L283 - FST/MVLCBK 60CB8, 60CB9 15KBY 60CB3Total: 301TOTAL 5282.0 EMERGENCY MANUAL LOAD SHEDDING PROCEDUREShedding should be carried out using the EMLS OV screen as shown in Appendix 5 (Figure 1). Thereal time loading on each element to be shed is shown on the screen. Follow the steps in sequentialorder as listed in the above table to shed each block.