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1. Visvesvaraya Technological University , Belagavi Internship Presentation on “Tungabhadra Hydro- Electric Power Station ” By T GOUTHAM 3PG20EE427 Department of Electrical & Electronics Engineering PROUDHADEVARAYA INSTITUTE OF TECHNOLOGY, [Affiliated to Visvesvaraya Technological University Belagavi & Approved by AICTE New Delhi.] T.B. DAM, HOSAPETE-583 225 Internship Guide Internship Co-Ordinator HOD Mr. K KARTHIK Prof. Firdosh P Prof . Prakash S AE, TB Board M.Tech M.Tech, (Ph.D) 1

2. CONTENTS General Specification TB Dam Power House Cross Sectional View Single line diagram Main Transformer Control & Protection Boards Switchyard Conclusion Reference 2 Dept. of Electrical and Electronics Engineering, PDIT, Hosapete

3. General Specification Tungabhadra Dam Official name: Tungabhadra Dam. Location: Hosapete Vijayanagar District, Karnataka. Construction began: 1949 Opening Date: 1953 Owners: Karnataka State. Operators: Tungabhadra Board. Fig .1: Tungabhadra Dam 5 Dept. of Electrical and Electronics Engineering, PDIT, Hosapete

4. General Specification Dam and Spillways Type of Dam: Composite, Spillway length (701m). Impounds: Tungabhadra River. Height: 49.50m (162 ft) from the deepest foundation. Length: 2,449m (8,035 ft). Spillway Capacity: 6,50,000 cusecs. Fig.2: Tungabhadra Dam Spillway 6 Dept. of Electrical and Electronics Engineering, PDIT, Hosapete

5. General Specification Reservoir Creates: Tungabhadra Reservoir. Total Capacity: 101 tmcft at FRL 498 m msl. Active Capacity: 98.7 tmcft (at 498 m msl). Inactive Capacity: 2.3 tmcft (below 477.01m msl) Catchment area: 28,180km²(10,880 sq mi). Surface area: 350km²(140 sq mi). Fig.3: Reservoir 7 Dept. of Electrical and Electronics Engineering, PDIT, Hosapete

6. General Specification Power Station Operators: Karnataka Govt Turbines: Near toe of the dam and canal drops Installed Capacity : 72 MW Fig.4:Powre Station 8 Dept. of Electrical and Electronics Engineering, PDIT, Hosapete

7. TB Dam power house cross sectional view 9

8. SINGLE LINE DIAGRAM 10

9. MAIN TRANSFORMER The existing main transformers in Umami Stage- I were replaced by new main transformer with rating of 3-phase step-up oil immersed with external heat exchangers. Suitable for outdoor services in the climate conditions at site as given in “Special Conditions of Contract”, and ONAF (Oil Natural Air Forced) rating, and ONAN (Oil Natural Air Natural) rating when the transformer is operated with the power less than 80 % of the rated capacity. Fig.5: Main Transformer (11KV/66KV) 11 Dept. of Electrical and Electronics Engineering, PDIT, Hosapete

10. Table.2: Type & Ratings of 3-Phase 11kV/66kV transformer SL.NO TRANSFORMER SPECIFICATION RATINGS 1 Number units installed 4 Nos 2 Type of Transformer Core type 3 Phase: Outdoor: Winding-natural-air-cooled, step up, Oil-immersed-type, generator transformer Ratings Operating duty: Rated frequency: Rated voltage: Low voltage winding: Tapped winding capacity: 3 2 Continuous 50Hz 66kV 11KV 10.6MVA 4 Temperature rises at rated operating condition 55K-Oil 12

11. CONTROL & PROTECTION BOARDS 13

12. Fig.6: Control Desk Dept. of Electrical and Electronics Engineering, PDIT, Hosapete 14

13. Fig.7: Control Panel Dept. of Electrical and Electronics Engineering, PDIT, Hosapete 15

14. Fig.8: Control Panel Dept. of Electrical and Electronics Engineering, PDIT, Hosapete 16

15. SWITCHYARD The equipment that are used in the Power houses (Switchyard) of TBDPH is as follows. Lightening arresters (LA) Current Transformer (CT) Potential Transformer (PT) Bus bar Transmission and Distribution Isolators Underground Cables Dept. of Electrical and Electronics Engineering, PDIT, Hosapete 17

16. Fig. 9 : Lightening arresters Fig. 10 : Current Transformer Fig. 1 1 : Potential Transformer Fig. 12 : Bus Bar Dept. of Electrical and Electronics Engineering, PDIT, Hosapete 18 22/07/20

17. INSULATOR Fig 13: Pin Insulator Fig 14: Post Insulator Fig 15: Suspension Insulator Fig 16: Strain Insulator Fig 17: Stay Insulator Dept. of Electrical and Electronics Engineering, PDIT, Hosapete 19 Fig 18: Shackle Insulator

18. Isolators Fig 19: Insulators Dept. of Electrical and Electronics Engineering, PDIT, Hosapete 20

19. Underground Cables Fig 20: Underground Cable Dept. of Electrical and Electronics Engineering, PDIT, Hosapete 21

20. CONCLUSION In the internship I have came across history behind the construction of Tungabhadra Dam its capacity, the process of generation of electricity through hydro energy. All over it was a great opportunity where I gained a professional experience in the practical knowledge such as generation of electricity by hydro source. 23 Dept. of Electrical and Electronics Engineering, PDIT, Hosapete