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National Hydroelectric Power Corporation Limited | Hydropower | Turbine

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SUMMER TRAINING NHPC – FARIDABAD A Project Report On Study of Hydro Power Plants and Detailed Design of Large Hydro Generators July 19, 2006 Aditya Lad Ankur Singhal Hanish Kukreja III Year, Electrical Engineering, IIT Roorkee. Page 1 of 67 TABLE OF CONTENTS National Hydroelectric Power Corporation Limited (NHPC)................................................... 6 CORPORATE MISSIONS........................................................................................................ 7 COR
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  SUMMER TRAINING NHPC – FARIDABAD AProject ReportOnStudy of Hydro Power Plants and DetailedDesign of Large Hydro Generators July 19, 2006 Aditya LadAnkur SinghalHanish KukrejaIII Year,Electrical Engineering,IIT Roorkee . Page 1 of 67  TABLE OF CONTENTS  National Hydroelectric Power Corporation Limited (NHPC)...................................................6CORPORATE MISSIONS........................................................................................................7CORPORATE OBJECTIVES...................................................................................................7PROFILE OF NHPC:................................................................................................................7PERFORMANCE HIGHLIGHTS(2005-06).............................................................................8PROJECT DETAILS...............................................................................................................10PROJECTS (Completed and in operation):.........................................................................10PROJECTS UNDER CONSTRUCTION............................................................................11PROJECTS UNDER DEVELOPMENT.............................................................................11PROJECTS AWAITING CLEARANCE/GOVT. APPROVAL (Stage-II)........................11PROJECTS FOR DPR & INFRASTRUCTURE DEVELOPMENT (Stage-II).................12PROJECTS UNDER SURVEY AND INVESTIGATION (Stage-I)..................................12PROJECTS IN PIPELINE..............................................................................................................................................12SMALL HYDRO/GEOTHERMAL PROJECTS................................................................13PROJECTS ON DEPOSIT / TURNKEY CONTRACT BASIS.........................................13PROJECTS IN JOINT VENTURE.....................................................................................13LOCATION MAP OF NHPC PROJECTS.............................................................................14EXPERTISE OF NHPC IN HYDROELECTRIC PROJECTS...............................................15REHABILIATION & RESETTLEMENT..............................................................................15METHODOLOGY OF FORMULATION OF R & R PLAN.............................................15DESIGN E & M (ELECTRICAL AND MECHANICAL) DIVISION...................................17DATA GROUP .....................................................................................................................17GENERAL INTRODUCTION................................................................................................18HYDROPOWER GENERATION AND ITS PRINCIPLES..............................................18HYDROPOWER PLANT.......................................................................................................19MAIN PARTS OF HYDROPOWER PLANT....................................................................19TYPES OF HYDROPOWER PLANTS..............................................................................20PLANT DESIGN ................................................................................................................21HYDRO TURBINES...............................................................................................................22TYPES OF HYDRO-TURBINES :.....................................................................................22MAJOR COMPONENTS OF TURBINE:..........................................................................22VALVES:.................................................................................................................................23POWER HOUSE.....................................................................................................................24PROCEDURE FOR DIMENSIONING OF POWER HOUSE ..........................................24HEAD CALCULATION.........................................................................................................24SELECTION OF MACHINE SPEED.....................................................................................25CALCULATION OF SPEED:.................................................................................................25HYDRO GENERATORS........................................................................................................25CLASSIFICATIONS...........................................................................................................26DESIGNATION..................................................................................................................26Page 2 of 67  GENERATOR BARREL.....................................................................................................27COMPONENTS OF GENERATOR...................................................................................29PARTS OF STATOR ...........................................................29ROTOR COMPONENTS ..................................................................30BRACKETS.....................................................................................................................33GENERATOR AUXILIARIES.......................................................................................34TURBINE – GENERATOR SET............................................................................................36DESIGN STUDY.....................................................................................................................37OUTPUT COEFFICIENT...................................................................................................37MACHINE PARAMETERS...............................................................................................38STATOR DESIGNING.......................................................................................................40MODIFIED CALCULATION.............................................................................................42RADIAL LENGTH OF AIR GAP......................................................................................42SHORT CIRCUIT RATIO..................................................................................................43EFFECT OF SCR ON MACHINE PERFORMANCE....................................................43CALCULATION OF MEAN LENGTH OF A TURN. .....................................................44NUMBER OF RADIAL VENTILATING DUCTS..........................................................44ARMATURE WINDINGS, COILS AND THEIR INSULATIONS..................................45WINDINGS........................................................................................................................47ARMATURE WINDINGS: ..............................................................................................48CHOICE OF TYPE OF STATOR WINDING....................................................................50Annexure I...............................................................................................................................52Annexure II..............................................................................................................................55Page 3 of 67  ACKNOWLEDGEMENT We are thankful to Mr. V.K Abbey -Executive Director, Mr. M.A. Padmanabhacharya – Chief Engineer (E) ,Mr. Anish Gouraha – Deputy Manager (E) , Mr. Abhishek Ranjan – Engineer (E) , Mr. Sunil Kumar –Engineer (E), Mr. Kapil Shrivastava, Engineer (IT) of Design (E&M) Division for their regular guidance and kind co-operation in the project.We are also thankful to the Design (E&M) staff for their cooperation and help insolving our problems.Page 4 of 67
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