Loss Reduction and CDM at Gubbi Substation

1. Loss Reduction and CDM at Gubbi Substation Energy Economy & Environmental Consultants Bangalore INDIA

2. Power Scenario -India Total Energy Generated - 500 BU Losses - 150 BU

3. The Need for the Project • High Technical losses (25 - 30%) especially in Distribution systems • Annual generation in India 500 BU and Losses estimated 125 Billion Units amounting to Rs. 375 Billion annually • International standard for technical losses - 8 to 10%

4. Power Scenario - Karnataka Total Power purchase - 29050 MU Avg. cost of supply - Rs. 3.52/kWh

5. Agricultural sector - Karnataka • Number of Pumpsets - 11 Lakhs • Energy Consumption - 35 % • Revenue Realized - 4% • T & D Loss - 25 to 30% • Energy Theft - 20 to 25% • Average Pumpset efficiency - 20 to 25%

6. Gubbi • Gubbi Substation 110/11 kV • Capacity - 30 MVA • Feeder - 13 Nos • Consumption - 90 MU • Pumpsets - 8400 Nos • Crops grown - Arecanut, Palm, Vegetables, cash crops • Metered energy - 4%

7. Farmer’s problems • Poor Voltage Conditions • Low power factor • Low reliability • Frequent motor burn outs • Restricted availability of power immaterial of field requirements

8. Utility’s perspective • Unplanned Development • High T & D Losses • Improper Load Distribution • Overloading of Feeders & DTCs • Poor Voltage Conditions • Power Pilferage • Low Revenue Generation

9. The solution • Implement loss reduction measures • High voltage distribution system • Efficient small capacity transformers • Load management system • Energy efficient pumpsets

10. Action • Implement loss reduction measures through commercial projects • Advantages • Improved power quality (Voltage, PF) • Low losses • High reliability • Prolonged equipment life

11. Benefits • Financial Indicators • IRR of 35% on equity • IRR of 18 - 20% on project costs • Reduced GHG emissions due reduction in overall demand - Carbon trading • Huge potential for replication

12. Statistics for G.Hosahalli feeder • Consumption per Annum - 7.6 MU

13. HT network - Present Demand : 4680 kW Line Losses : 680 kW

14. HT network - After modifications Demand : 3459 kW (4680) HT Line Losses : 150 kW (680) New Line

15. Existing Rural LT Transformer Rating : 100 kVA Total Consumers : 18 nos Analysis Results Demand : 102 kW Agricultural : 64 kW Domestic : 8 kW Technical losses : 30 kW

16. Network with HVDS ST ST HVDS Demand : 78 kW (102 kW) Line Losses : 6 kW (30 kW) ST ST Small capacity transformers ST ST ST

17. DSM - HVDS & EE pumpsets ST EE pumpsets ST HVDS & EE pumpsets Demand : 59 kW (102 kW) Line Losses : 4 kW (30 kW) ST ST Small capacity transformers ST ST ST

18. Metering Arrangement

19. Metering System • Installing a system of grouped metering and a switch which can be remotely operated through Power Line Carrier Communication equipment. The necessary signals will be injected through an injecting transformer installed on the 11 kV busbar at the substation. • The loads will be grouped into 3 - 4 divisions to enable selective switching. The lines will be energised for 24 hours and the pump loads provided power for limited period of 8 hours (or as per requirements from time to time) • Single phase transformers for lighting and commercial loads will be installed for a cluster of domestic services and power supply made available for 24 hours a day • The installed system of meters also records consumption of a group of pumpsets. This will enable monitoring change of status of capacities, additional unauthorised load additions etc.

20. Total Benefits - Power

21. Financial Analysis - Gubbi Substation Indicators Network upgradation with pumpset replacement (25%) Investment (Rs. Crores) 39.32 Energy Savings (MU/annum) 28.00 Savings (Rs. Crores/annum) 8.40 Simple Payback (Years) 4.70 IRR % 20.00 DSCR - 1.69

22. Benefits - CDM - Gubbi substation

23. Benefits - CDM (Extrapolated - India)

24. Thank You