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WELCOME IMPLEMENTATION OF NEW LOAD

SHEDDING SCHEME IN BPCL-KR USING SCADA

AKHIL ASHOK T VALEENA FERNANDEZ

INTRODUCTION

• BPCL KR a MAH installation• Automation using SCADA• Aim – study of existing load shedding scheme & SCADA based load shedding scheme

ABOUT BPCL KR

• Kochi Refinery, a unit of Bharat Petroleum Corporation Limited (BPCL), embarked on its journey in 1966 with a capacity of 50,000 barrels per day.

• BPCL KR - Ambalamugal near the city of Kochi in Kerala

• The refinery has facilities to evacuate products to the consuming centers through road, rail, ships and through pipelines.

• The BPCL installation at Irumpanam, to which the refinery is connected by pipelines, is the major product distribution centre of the refinery.

• Kochi Refinery has taken it as a mission to make safe living and working a natural mantra of its employees, contract workers, customers and the general public.

SINGLE LINE DIAGRAM

POWER SYSTEM IN KR

• 2 KSEB 220 KV grid• GTG 1 22 MW at 11 KV level• GTG 2 34.5 MW at 11 KV level• STG 17.8 MW at 11 KV level• TG 25 MW at 3.3 KV level• 2 switch gears 33 KV (HT101) and 11 KV (GIS)• Critical loads 19.5 MW

LOAD SHEDDING

• Power system normal condition – adequate generating to meet load

• Load shedding – imbalance b/w supply & demand

• Types – fast & slow• Ways – manual & automatic

EXISTING LOAD SHEDDING SCHEME

• Types – overloading of generators under frequency based• Feeder based load shedding scheme• Frequency wise load shedding• 123.dotx• Under frequency relays – 7RW 600• Limitation – load segregation not possible

SCADA

• Supervisory Control and Data Acquisition• Monitor & control – distributed process• MTU – master terminal unit• RTU – remote terminal unit• HMI – human machine interface

SCADA BASED

• Power deficit – load shedding initiated• Power balance calculation - Load to be tripped=Total load-(Total

generation + Margins available in running generators)

• Tripping command – pre set priority

CONCLUSION

• Complex network – central control room • Obtain stable plant operation – instability in

supply• Application of SCADA – various levels• Replace conventional relays – numerical relays

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