Ref: Scoping Clearance Letter (ToR) J-12011/12/2018-IA.l(R), dated:

Transcription

1 Greenko Energies (CJN: U419TG2fTC3499) Private Limited Greenk Ref: Pl RESP /Kurnool/MoEF&CC/ToR-Amendment/2 Dated: The Diretor Environmental Impat Assessment Division (River Valley & Hydro Eletri Projets) Ministry of Environment, Forests and Climate Change, Indira Paryavaran Bhawan Jorbagh, New Delhi-11 3 Sub: Soping Clearane from MoEF&CC for Pinnapuram!RESP-Storage Projet in Kurnool Distrit of Andhra Pradesh - appliation to get Amendment of ToR-Reg. Ref: Soping Clearane Letter (ToR) J-1211/12/218-IA.l(R), dated: Dear Sir, This has referene to the Soping Clearane (ToR) granted by MoEF&CC dated for Pinnapuram Pumped Storage Projet whih is a part of Integrated Renewable Energy Projet loated in l<urnool distrit of Andhra Pradesh. We had initiated neessary Survey & investigation immediately, after reommendation of EAC for soping learane for the proposed IRESP. Would like to bring to your kind notie that, the olletion of data for preparation of draft EIA & EMP report is under proess. During the proess of Survey and investigation for the preparation of DPR it was observed that the optimal apaity of the Proposed Projet will be 12 MW instead of 1 MW as proposed earlier, for whih soping learane was obtained. Due to hange in apaity, the revised Salient features and Land requirement are listed at Annexure I & II respetively. Updated Exeutive summary is attahed along with this letter, where in detailed reasons for the proposed hanges are also mentioned. In view of the above explained, we request you to kindly onsider the proposed hanges in Soping Clearane to submit final EIA/EMP report, after Publi Consultation to get Environmental Clearane. We shall be pleased to submit any additional information and larifiation required. Yours Faithfully Thanking You, ~ f~,~ For Greenko Energies Private Limited Authorised Signatory Registered Offie: Plot No. 171, Road No. 44, jubilee Hills, Hyderabad- 533, Telangana, Ph: +91(4)431, Fax: +91(4)

2 Pinnapuram IRESP - Storage Projet SALIENT FEATURES OF THE PROJECT Desription As per Soping Clearane As per Revised Layout 1 Loation a Country India India b State Andhra Pradesh Andhra Pradesh Distrit Kurnool Kurnool d Village near Power House Pinnapuram Pinnapuram 2 Geographial Co-Ordinates a Pinnapuram IRESP Reservoir - Upper {Now Proposed) Latitude 15 35' 38.57" N 15 34' 59.47" N Longitude 78 18' 29.17" E 78 19' 7.59" E b Gorakallu Reservoir - Lower (Existing) Latitude 15 35' 43.25" N 15 35' 43.25" N Longitude 78 18' 18.11" E 78 18' 18.11" E 3 Aess To Projet Site a Airport Hyderabad Hyderabad b Rail head Kurnool - 81 Kms Kurnool - 81 Kms Road Gorakallu Gorakallu d Port Krishnapatnam Krishnapatnam 4 Projet a Type Pumped Storage Projet Pumped Storage Projet b Storage Capaity 8 MWH 96 MWH Rating 1 MWH 12 MWH d Peak operation duration 8. Hours daily l 8. Hours daily 5 Pinnapuram Reservoir - Upper (Now Proposed) Upper Reservoir Upper Reservoir a Cathment Area 9.45 Sqkms 1.38 Sqkms b Max flood disharge umes umes Live Storage 1.TMC 1.TMC d Dead Storage.32 TMC.92 TMC e Gross Storage 1.32 TMC 1.92 TMC f Full Reservoir level {FRL) EL m EL m g Min. Draw Down Level (MDDL) EL +37.m EL +368.m h Deepest Foundation Level EL +346.m EL +33.m i Height of Dam from Deepest foundation level 49. m 58. m j Length of dam Aross the flow Along the flow - Right,s1de/ Along the flow - Left ~ide.. ', t I ' ~a.ies~ 51. m 657. m (aross gorge), ~ I ~ \1, m (Right Side) ~ J; J ~,, ;._ m (Left Side) 'I ~", f_4j lfl. ~~-~ ' -

3 6 Total length of Dam 51.m 4S4 m k Top width of the dam 1. m 6. m Gorakallu Reservoir - Lower (Existing) a Cathment Area 77.7Sq KM 77.7Sq KM b Max. flood disharge 848umes 848umes - - Live Storage 1.29 TMC ( Mum) 1.29 TMC ( Mum) d Dead Storage 2.15 TMC (6.88 Mum) 2.15 TMC {6.88 Mum) e Gross Storage TMC ( Mum) TMC ( Mum) f Full Reservoir level (FRL) EL m EL m g Min. Draw Down Level (MDDL) EL m EL m 7 Approah Channel a Type Trapezoidal Channel - Conrete Lined Deleted b Length of the hannel 145 m Deleted Bottom width of the hannel 55 m Deleted d Full Supply Depth 6. m Deleted e Bed Slope 1 in 5m Deleted 8 Power Intake a Type Open Semi Cirular Open Semi Cirular b Elevation of Intake enter line EL m EL m Elevation of Sill level of intake EL m EL m 9 Power Pipe a Diameter of pipe NA 8. m b Length of penstok NA 912 m eah Number of Pipes NA 6 Nos Independent Pipes 1 Surge Shaft a Dia. NA 35.25m dia. b Height NA 65. m 11 Penstok Tunnel/Pressure Shafts a Type Finished steel lined - irular Finished steel lined - irular 4 Nos Independent Penstoks 5 Nos Independent Penstoks b Number of Penstoks & 1 No Independent Penstok bifurated & 1 No Independent Penstok bifurated in in to 2 to 2 Diameter of penstok 6.m 7. m d Length of penstok m eah 86 m eah 12 Powerhouse a Type Underground 'D' Shape Surfae Powerhouse b Dimensions L 24.m x B 25. m x H 49. m L 2.m x B 35. m x H 58. m 13 Transformer Cavern a Type Underground 'D' Shape - b Dimensions.f7;: L 173.m x B 15. m xj/' 14 Tail Rae Tunnel I Deleted ~~~J)~ Deleted... -., """'' '/. s:» I, I I ~ 1\ 6) Cl) ~ ",9 <....,,~ ' - *

4 a Tail Rae Tunnel - 2 Nos Twin Tunnels Deleted b Type of tunnel Modified Horse Shoe Deleted - Diameter of Tunnel 12. m Deleted d Length of eah Tunnel 386 m Deleted e Bed Slope 1 in 1442 Deleted 15 Surge Chamber a Type Underground 'D' Shape Deleted b Dimensions L 175.m x B 25. m x H 76. m Deleted Expansion Chamber L 13.m x B 25. m x H 21. m Deleted 16 Tailrae Outlet a Type Open Semi Cirular Open Semi Cirular b Elevation of outlet entre line EL m EL m 17 Tail Rae Channel Trapezoidal Channel - Unlined Trapezoidal Channel - lined a Lenth of the hannel 22 rn 33 m b Bed Width 55 m 7 rn Full supply depth 6.m 6. m d Bed fall 1 in 5 1 in 5 Tailrae Outlet Struture No. of bays in eah trash rak 6 Nos 6 Nos 18 Eletro Mehanial Equipment a 2MW Turbines Pump Turbine Franis type, vertial shaft reversible Franis type, vertial shaft reversible pumppump-turbine turbine Total No of units 4 Units (2 Nos with Variable speed & 2 5 Units (2 Nos with Variable speed & 3 Nos Nos with Fixed Speed) with Fixed Speed) Rated Pumping Head m m Pump Capaity 22MW 235MW Rated Head in Turbine mode 134. m m Turbine Capaity 2MW 2MW Turbine Design Disharge Cume for eah unit 177. Cume for eah unit Synhronous speed rpm 15 rpm b Generator-Motor Three (3) phase, alternating urrent Three (3) phase, alternating urrent Type synhronous, generator motor semi synhronous, generator motor semi umbrella type with vertial shaft umbrella type with vertial shaft Number of units 4 Units 5 Units Rated Capaity Generator - 2MW; Generator - 2MW;. ) ~ Pump Input - 22MW Pump Input- 235 MW I Rated Voltage. " '~ 13.8KV 13.8KV Main Power Transformer h,\es~ Type Indoor, 3-Ph transforme ~ ttfi" off i~ a, ~ door, 3-Ph transformers with off iruit tap hanger ( OCTC) I s 11 ~ p hanger ( OCTC) ::. t; C))~.Q. v<,9 i -

5 Number of units 4 Units 5 Units -- Rated Capaity of eah unit 25 MVA 28 MVfl Rated Voltage Primary kv; Seondary - 4 kv Primary-13.8 kv; Seondary - 4 kv adjustable voltage: range of the seondary adjustable range of the seondary voltage: -1% to +1%(3kV/tap) -1% to+ 1%(3kV /tap) a loomw Turbines Pump Turbine Total No of units Franis type, vertial shaft reversible Franis type, vertial shaft reversible pumppump-turbine turbine 2 Units {1 Nos with Variable speed & 1 2 Units (1 Nos with Variable speed & 1 Nos Nos with Fixed Speed} with Fixed Speed) Rated Pumping Head m m Pump Capaity 13MW llsmw Rated Head in Turbine mode 134. m m Turbine Capaity loomw loomw Turbine Design Disharge Cume for eah unit 88.5 Cume for eah unit Synhronous speed rpm rpm b Generator-Motor Three {3) phase, alternating urrent Three (3) phase, alternating urrent Type synhronous, generator motor semi synhronous, generator motor semi umbrella type with vertial shaft umbrella type with vertial shaft Number of units 2 Units 2 Units Rated Capaity Generator - loomw; Generator - loomw; Pump Input - 13MW Pump Input MW Rated Voltage 13.8KV 13.8KV Main Power Transformer Type Indoor, 3-Ph transformers with off iruit Indoor, 3-Ph transformers with off iruit tap hanger {OLTC) tap hanger (OLTC) Number of units 2 Units 2 Units Rated Capaity of eah unit 15 MVA 14 MVA Rated Voltage Primary-13.8 kv; Seondary - 4 kv Primary-13.8 kv; Seondary - 4 kv adjustable voltage: range of the seondary adjustable range of the seondary voltage: -1% to +1%{3kV/tap) -1% to +1%{3kV/tap) 2 421(V Gas Insulated Swithgear 1 Type of GIS Indoor Type Indoor Type 2 No. of GIS units One No One No 3 Loation Indoor Indoor 4 Sheme Double Busbar Arrangment Double Busbar Arrangment, - -~,.t\ /, ',y.; I '

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7 PINNAPURAM INTEGRATED RENEWABLE ENERGY WITH STORAGE PROJECT (IRESP) EXECUTIVE SUMMARY 1.1 Introdution Proposed Pinnapuram Integrated Renewable Energy with Storage Projet (IRESP) is loated in Kurnool Distt of Andhra Pradesh. Pinnapuram IRESP is a 4 GW projet i.e. 2 GW of Solar Projet and 2 GW of wind projet with storage apaity of 12/ 96 MWH. This entire projet is a self-identified projet and is a first of its kind in the ountry whih will supply firm dispathable renewable power to the Disom/Grid for 24 Hrs i.e. round the lok (RTC). All three omponents of Pinnapuram IRESP are in losed viinity therefore power from all three omponents will be pooled in a ommon pooling station and will be onneted to PGCIL substation at Orvakallu. Storage omponent of Pinnapuram IRESP is a pumped storage projet of 12/96 MWH storage apaity, loated in Kurnool distrit of Andhra Pradesh. Pinnapuram IRESP- Storage Projet will omprise of two reservoirs i.e. Gorakallu Reservoir (already existing) and Pinnapuram Reservoir (to be onstruted in natural depression). This projet is a one of its kind beause both the reservoirs are not loated on river ourse i.e. Gorakallu reservoir (existing) is a balaning reservoir and is loated on a anal network and Proposed Pinnapuram reservoir in a natural depression. These reservoirs are far away from any river ourse. The Pinnapuram IRESP - Storage Projet is loated in Kurnool distrit of Andhra Pradesh. It envisages reation of reservoir near Pinnapuram Village aross Muni Madugu whih joins into existing Gorakallu Reservoir near village Gorakallu under Nandyal Mandal, about 8 Kms from Kurnool. The Pinnapuram IRESP - Storage Projet is proposed in between two reservoirs i.e. Pinnapuram Reservoir as Upper reservoir (to be onstruted newly) and the existing Gorakallu (Narasimharaya sagar) Reservoir as Lower reservoir. This sheme envisages non-onsumptive re-utilization of 1. TMC of water of the existing Gorakallu reservoir by reirulation. The water in the Gorakallu (existing lower reservoir) will be pumped up and stored in the proposed Pinnapuram reservoir (upper Reservoir) and will be utilized for power generation. The Geographial oordinates of the proposed Pinnapuram reservoir are at longitude 78 19' 7.59" East and latitude is 15 34' 59.47" North and that of Gorakallu reservoir (existing) are 78 18' 18.11" E and 15 35' 43.25" N. Proposed Rating of the Pinnapuram Pump storage projet is 12 MWH. Pre Feasibility Report of Pinnapuram IRESP - Storage Projet Rev - R Page 1

8 1.2 Sope of Report The proposed Pinnapuram IRESP - Storage Projet is a self-identified projet and this Prefeasibility Study Report has been prepared by M/s Aarvee Assoiates to study, evaluate and establish the tehnial feasibility and eonomi viability of the proposed Pinnapuram IRESP. 1.3 Sope of Works The Pinnapuram IRESP - Storage Projet envisages onstrution of upper reservoir aross Muni Madugu whereas existing Gorakallu reservoir near Gorakallu village in Nandyal Mandal of Kurnool Distrit will be the lower reservoir. The existing Gorakallu reservoir is under operation with a live storage apaity of TMC and Pinnapuram reservoir is proposed for the live storage apaity of 1. TMC. Proposed Sheme will involve onstrution of 58m high Conventional Conrete Gravity Dam aross the gorge and on both right and left side Rok fill Dam is also proposed on u/s side for reation of Pinnapuram reservoir. Intake struture and trash rak for six numbers of independent penstoks in whih One penstok will be bifurated in to two as hydrauli short iruit to onnet two units will be taking off from Pinnapuram reservoir. A surfae Power House will be loated downstream to the Pinnapuram dam and shall be equipped with five vertial-axis reversible Franis type units omposed eah of a generator/motor and a pump/turbine having generating/pumping apaity of 2MW/235MW and two units of 1MW/115MW respetively. Gas insulated swithgear (GIS) will be provided downstream side of Power house, above the ontrol room. Step up transformers will also be plaed in the same room provided above the ontrol room. The Pinnapuram IRESP - Storage Projet envisages onstrution of 58 m high Conventional Conrete Gravity Dam aross the gorge and on both right and left side Rok fill dam is also proposed on u/s side (ie. 1896m long on right side and 151m long left side) for reation of Pinnapuram reservoir of 1.92 TMC gross storage apaity. 6 nos. of 912. m long and 8.m dia. irular steel lined low pressure pipeline to onnet to 3 nos. of 35.25m dia Surge shaft 5 nos. 86.m long and 7.m dia irular steel lined high pressure pipeline to feed 5 units of 2 MW 1 nos. 86.m long and 7.m dia irular steel lined high pressure pipeline bifurated Pre Feasibility Report of Pinnapuram IRESP - Storage Projet Rev - R Page 2

9 to 2 penstoks to feed 2 units of 1 MW Surfae Power house having an installation of five nos. reversible Franis turbine eah of 2 MW apaity (3 units of fixed speed and 2 units of variable speed turbines) and two nos. reversible Franis turbine eah of 1 MW apaity (1 unit of fixed speed and 1 unit of variable speed turbines) operating under a rated head of m in generating mode and m in pumping mode. 7m wide onrete lined Tail rae hannel with FSD of 6.m and 33 m long onneting Tail rae hannel to the existing Gorakallu reservoir. Transformer Hall equipped with 5 nos. 3-Ph, 13.8 KV/4 KV, 28 MVA and 2 nos. 3- Ph, 13.8 KV/4 KV 14 MVA step up/step down transformers and GIS. 1.4 Hydrology The total athment area of the existing Gorakallu Reservoir is 77.7 Sq.Km and the design flood disharge is 848 ume. The gross storage apaity of the Gorakallu reservoir is Mum (12.44 TMC) and the live storage is Mum (1.29 TMC). Operational pattern of Pinnapuram IRESP - Storage Plant has been kept in suh a way that 1. TMC of water will be utilized for the proposed Pinnapuram IRESP - Storage Projet without affeting the existing ommitments at existing Gorakallu Reservoir. The projet is a pumped storage sheme and hene, no onsumptive utilization of water is required for its operation. The upper reservoir at Pinnapuram is proposed with an live storage of 1. TMC to failitate the pumping operations. The athment area at the proposed Pinnapuram reservoir is 1.38 Sqkm. 1.5 Installed Capaity The Pinnapuram IRESP is proposed with a Storage Capaity of 96 MWH with Rating of 12 MWH. This Projet is omprising of 5 units of 2 MW eah and 2 units of 1 MW eah. The installed apaity of a pumped storage sheme is influened by the requirements of daily peaking power requirements, flexibility in effiient operation of units, storage available in the reservoirs and the area apaity harateristis. The Projet will generate 12 MWH by utilizing a design disharge of 162 Cume and rated head of m. The Pinnapuram IRESP will utilize 145 MW to pump 1. TMC of water to the upper reservoir in 9.51 hours. Pre Feasibility Report of Pinnapuram IRESP - Storage Projet Rev - R Page 3

10 The Key parameters of Pinnapuram IRESP are as follows: Sl. No. Parameter Unit Value 1 Storage Capaity MWH 96 2 Rating MWH 12 3 No. of Units Nos. 7 4 Rated Head in Turbine mode m Total Design Disharge Cume Design Disharge per unit of 2 MW Cume Design Disharge per unit of 1 MW Cume Turbine Capaity 5 Units MW 2 1 Turbine Capaity 2 Units MW 1 11 Pump Capaity 4 Units MW Pump Capaity 2 Units MW Rated Head in Pump mode m Pumping Duration Hrs Cyle Effiieny % Power Evauation Power evauation is proposed to be done through 4kv iruit transmission lines. Power evauation is part of IRE projet. 1.7 Environmental Aspets Upper and lower reservoir for Pinnapuram IRESP will onsist of proposed Pinnapuram reservoir (to be onstruted new ly) and the existing Gorakallu reservoir. There will be submergene of land required for the proposed Pinnapuram reservoir for the Pinnapuram IRESP - storage projet. Also, the land required is for the onstrution of power house omplex and its apparent works viz., Intake struture, penstoks, powerhouse, surge Chamber, Tail Rae Tunnel and Tail Rae Channel et. Total land required for the onstrution of various omponents is about 524 Ha inluding submergene by formation of Pinnapuram reservoir. The projet omponents of Pinnapuram IRESP are in Gani forest under Kurnool Range. Based on assessment of environmental impats, management plans have to be formulated for Cathment Area Treatment, ompensatory afforestation and other environmental issues like rehabilitation & resettlement. These issues would be addressed during the investigations for DPR. Pre Feasibility Report of Pinnapuram IRESP - Storage Projet Rev - R Page 4

11 1.8 Constrution Planning & Shedule It is proposed to onstrut the projet with in a period of 3. years inluding infrastruture development whih is proposed to be ompleted within 6 months. 1.9 Projet Cost Estimate The estimate of the projet ost has been prepared as per the "Guidelines for formulation of Detailed Projet Reports for Hydro- Eletri Shemes" issued by Central Eletriity Authority in January 215 (Revision 5.) to arrive at hard ost of the proje t at May 218 prie level. Quantities have been worked out on the basis of preliminary designs and drawings of different omponent works. Unit rate analysis was done as per the Guidelines for the preparation of Detailed Projet Report of Irrigation and Multipurpose Projets and Guidelines for the preparation of Estimates for River valley projets. The quantities and ratings of various Hydro Mehanial and Eletro-mehanial equipment s have been worked out on the basis of system design and equipment sizing alulations.the total projet ost works out as given below: S.NO. Desription of Item Cost in Crores 1 Cost of Civil Works Cr 2 Cost of Power Plant Eletro Mehanial 192. Cr. Equipment inluding Transmission line 3 Total Hard Cost Cr. 4 Interest during Constrution 449. Cr. 5 Total ost of the Projet Cr. 1.1 Eonomi Finanial Analysis The eonomial evaluation of Pinnapuram IRESP - Storage Projet will be arrived at as part of the Integrated Renewable Energy Projet Finanial Analysis. The alulations have been worked out onsidering a debt- equity ratio of 7: 3 and annual interest rate was at 9.5% Reasons for Change from Underground alignment to Surfae alignment While onduting survey and investigations it was observed that by hanging the Dam loation we an optimize the omponents and inrease the apaity so aordingly layout was amended and apaity was augmented to 12 MW. Another observation was that Underground geology of proposed alignment omprises of quartzite underlain by thik / flaggy bedded limestones and shales whih is not a very omfortable ondition geologially to loate underground power house very near to reservoir as possibility of movement and deformation is high. Seondly in ase of underground system Pre Feasibility Report of Pinnapuram IRESP - Storage Projet Rev - R Page 5

12 in pump storage projet, power house is not a single avern alone, it onsists of a set of three to four averns thus inreasing the vulnerability of underground omplex whih in turn impats the onstrution time of the projet. Another issue whih ame to light was that reently there were experienes of failures in averns in the exeution of Kaleshwaram projet and some other projets. in the state of Telangana, this further strengthened our apprehensions about geology for underground omplex. Keeping in view of the above onditions layout was amended and it was deided to bring power house to Surfae and all assoiated omponents were also modified. All these hanges in the layout and apaity have improved the yle effiieny of the plant whih is most dominant riteria in ase of pump storage projets and impats viability of projet diretly. Another aspet that impated the proposed hanges was the redution in onstrution period of the projet. As Solar and wind projets have very low gestation period, the ompletion period of this IRESP is being ontrolled by the onstrution period of pump storage projet alone. It was imperative to redue this period to as low as possible so that gap is barest minimum, with this improved layout that objetive is also being ahieved and projet onstrution period is now 3 years only Conlusions The Pinnapuram IRESP is envisaged to be ompleted in a period of 3. years. The projet ost works out to Rs Crores. The projet would generate designed energy of 367 MU. Other benefit of this storage projet an be in the form of spinning reserve with almost instantaneous start-up from zero to full power supply, supply of reative energy, primary frequeny regulation, voltage regulation, et. Pre Feasibility Report of Pinnapuram IRESP - Storage Projet Rev - R Page 6