Mudirappuzha Basin Hydro Electric Projects

               
Mudirapuzha River houses the lagest number of Power Stations Beginning with Maduppetty SHEP and upto Neriamangalam .
PALLIVASAL HYDRO ELECTRIC PROJECT
Pallivasal is the first hydro electric power station in Kerala. The project was completed in two stages. In the first stage, just a run-off river scheme was initially introduced with three units having capacity of 4.5 MW each. The first unit of the Pallivasal power station was commissioned on 19.03.1940. The second unit on 2-2-1941 and the third unit on 19-2-1942. The inaguration of Pallivasal power house was done by the then Diwan of Travancore Govt Sri C.P Ramaswami Iyer on 19-3-1940. The diverting wier constructed across Mudirapuzha river at Munnar called 'Ramaswamy Iyer Head Works', was inaguarted in 1944. The units 4.5 MW included in the first satge were up-rated to 5 MW in the fifties by changing the water wheels. The first stage of the project was completed with three units of 5 MW capacity.The second stage of development saw addition of three machines of 7.5 MW capacity in the station and construction of two dams for storage of water.Sethuparvathipuram dam at Kundala and Madupetty dam together contributed about 65 MCM of storage.
SETUPARVATIPURAM (KUNDALA) DAM
This dam was completed in 1947. This is a masonry arch dam having a height of 46.93 m.
Full Reservoir Level (FRL)   1758.7m
Minimum Drawdown level (MDDL)   1735.84 m
Effective Storage at FRL   7.787 MCM
Generation potential at FRL 22.74 MU
MADUPETTY DAM
This is the first all concrete dam in india. Completed in the year 1954.
Full Reservoir Level (FRL)   1599.59 m
Minimum Drawdown level (MDDL)   1554.48 m
Effective Storage at FRL   55.4 MCM
Generation potential at FRL 161.23 MU
Pallivasal Power House
Place       Chithirapuram  
Village       Pallivasal
Taluk       Devikulam
District       Idukki
Average head 570 metre
Prime mover Horizontal Shaft Pelton Turbine
Unit Rating Date of Commissioning Ramarks
U # 1 4.5 MW 19.03.1940 up rated to 5 MW by changing the water wheels in 1950s
U # 2 4.5 MW 02.02.1941 up rated to 5 MW by changing the water wheels in 1950s
U # 3 4.5 MW 10.02.1942 up rated to 5 MW by changing the water wheels in 1950s
PHASE II DEVELOPMENT AT PALLIVASAL POWERHOUSE
The second stage development added three units of 7.5 MW each, taking the total installed capacity of the station to 37.5 MW (3 x 5 MW + 3 x 7.5 MW).
Unit Rating Date of Commissioning
U # 4 7.5 MW 01.05.1948
U # 5 7.5 MW 01.10.1949
U # 6 7.5 MW 07.03.1951
RENOVATION OF PALLIVASAL POWER HOUSE.
The renovation and modernisation of the Pallivasal Power station was carriedout from the year 2000 as part of the Pallivasal - Panniyar - Sengulam Hydro Upgrading Project (PPSHUP). The date of commissioning of renovated machines are as below.
AFTER RENOVATION
Unit Rating Date of Commissioning
after renovation
U # 1 5 MW 19.11.2001
U # 2 5 MW 17.11.2001
U # 3 5 MW 20.11.2001
U # 4 7.5 MW 26.08.2002
U # 5 7.5 MW 21.08.2002
U # 6 7.5 MW 19.08.2002
Installed capacity 37.5 MW
Firm Annual generation Capability 284 MU
Generation in Mu for the last Five years from Pallivasal Power station
Year 2009-10 2010-11 2011-12 2012-13 2013-14 2014-15
Genearion in Mu 240.16 235.63 231.45 169.60 215.53 211.69
 
The power generated in this station is evacuated using 5 feeders at 66 kV level. Discharged water from this station is utilised for power generation in the Sengulam HEP.
MADUPETTY POWER STATION
This is the power house situated at the highest level in Kerala at 1556 m above MSL and constructed in 1997-98 as Dam toe power house of Maduppatty Reservoir . The 2 MW generator generates at 11 kV and is connected to the 11 kV feeder. The station uses horizontal shaft francis turbine. The 275 rpm turbine and 750 rpm generator are coupled through a speed increasing gear box. The dicharged water from this power station is heading towards Ramaswamy Iyer headworks for further power production at Pallivasal Powerhouse. The annual Generation Capability of Maduppaty Power house is 6.40 MU
Place      
Village    
Taluk    
District    
Installed capacity 2 MW
Firm Annual generation Capability 6.4 MU
Prime mover Horizontal Shaft Francis Turbine
Unit Rating Date of Commissioning
after renovation
U # 1 2 MW 1997-98
Generation in Mu for the last Five years from Maduppatty Power station
Year 2009-10 2010-11 2011-12 2012-13 2013-14 2014-15
Genearion in Mu 1.91 2.28 1.218 2.44 6.01 3.83
SENGULAM POWER STATION
               
The Sengulam Project was mainly intended to utilise the tailrace water from Pallivasal project. The project was commissioned in 1954 with an installed capacity of 48 MW (4 x 12 MW). Sengulam balancing reservoir was formed by constructing a dam at Sengulam. This reseroir has a storage capacity of 1.61 MCM. The water level of sengulam balancing reservoir is 10m higher than the tailrace water level of Pallivasal Powerhouse. Hence a pumping system is provided at Pallivasal powerhouse to pump the tailwater to Sengulam balancing reservoir. The waterlevel in the Sengulam balancing reservoir is kept within limits to avoid spill. The catchment area of the reservoir is approximately 5.18 sqkm.The tailrace discharge joins Mudirapuzha river and is flowing downstream to kallarkutty reservoir.
The location of the powerhouse .
Place       Vellathooval ( Right bank of Muthirappuzha )
Village       Vellathooval
Taluk       Devikulam
District       Idukki
Average head 341 metre
Prime mover Horizontal shaft Pelton having double runner
Unit Rating Date of Commissioning    
U # 1 12 MW 01.05.1954    
U # 2 12 MW 25.07.1954    
U # 3 12 MW 11.11.1954    
U # 4 12 MW 05.01.1955    
               
The generating units in the station were renovated during 2000 - 2002 period as part of PPSHUP ( pallivasal , p[anniyar Sengulalam Hydro Upgradation programme . The transmission lines from this station include one 110 kV lines to Neriamangalam Powerhouse, one 110 kV line Pala, two 110 kV lines to Panniyar powerhouse, one 66 kV line to Pallivasal and one 66 kV line to Moolamattom.
AFTER RENOVATION  
Unit Rating Date of Commissioning
after renovation
   
U # 1 12.8 MW 30.11.2002    
U # 2 12.8 MW 04.10.2002    
U # 3 12.8 MW 05.12.2001    
U # 4 12.8 MW 01.12.2001    
Installed capacity 51.2 MW
Firm Annual generation Capability 182 MU
   
Generation in Mu for the last Five years from Sengulam Power station
Year 2009-10 2010-11 2011-12 2012-13 2013-14 2014-15
Genearion in Mu 157.78 170.58 162.270 107.29 141.90 151.35
PANNIYAR POWER STATION
Place Vellathooval ( Left Bank of Muthirappuzha )
Village Vellathooval
Taluk Devikulam
District Idukki
RESERVOIRS
There are two reservoirs for this project , Anayirankal and Ponmudi
ANAYIRANKAL RESERVOIR
Anayirankal dam across the Panniyar river is the first dam for the project.
Full Reservoir Level (FRL)   1207.01 m
Minimum Drawdown level (MDDL)   1188.1 m
Effective Storage at FRL   49.87 MCM
Generation potential at FRL 65.62 MU
PONMUDI RESERVOIR
Ponmudi dam across the Panniyar river is the second dam for the project. The intake for the powerhouse is taken from this reservoir.
Full Reservoir Level (FRL)   707.75 m
Minimum Drawdown level (MDDL)   678.8 m
Effective Storage at FRL   47.4 MCM
Generation potential at FRL 63.52 MU
               
Unit Rating Date of Commissioning    
U # 1 15 MW 29.12.1963    
U # 2 15 MW 26.01.1964    
               
The generating units in the station were renovated during 2000 - 2003 period as part of PPSHUP. The power generated is stepped up to 110 kV and taken to 110 kV yard at Sengulam Powerhouse for onward transmission.
AFTER RENOVATION              
Unit Rating Date of Commissioning
after renovation
   
U # 1 16.2 MW 01.02.2003    
U # 2 16.2 MW 23.11.2001    
Installed capacity 32.4 MW  
Firm annual generation capability 158 MU
Prime mover Vertical shaft Francis
Tail race discharge    
The tailrace discharge joins Mudirapuzha river and is flowing downstream to kallarkutty reservoir
Power evacuation    
The Power generated is evacuated using two feeders at 110 kV level to the switch yard of Sengulam Power station
Generation in Mu for the last Five years from Panniyar Power station
Year 2009-10 2010-11 2011-12 2012-13 2013-14 2014-15
Genearion in Mu 132.80 180.85 184.470 90.10 168.66 154.95  
 
NERIAMANGALAM POWER STATION
The Kallarkutty dam across Mudirapuzha river makes the reservoir for the project. The main source of water is the discahrge from Sengulam and Panniyar power stations. The station was commissioned in 1961 with an installed capacity of 45 MW (3 x 15 MW). and up rated to 52.65 MW ( 3 x 17.55MW) during 2004-2006.
KALLARKUTTY RESERVOIR
Catchment Area   281.24 Sq. Km.
Full Reservoir Level (FRL)   456.59 m
Minimum Drawdown level (MDDL)   445.91 m
Effective Storage at FRL   5.49 MCM
Generation potential at FRL     4.83 MU
Effective head at powerhouse 180 m
Place Panamkutty
Village Adimaly
Panchayth Adimaly
Taluk Devikulam
District Idukki
Avearge net head 180 metre
Prime mover Verticcal shaft Francis turbine
Bfore Renovation
Unit Rating Date of Commissioning
U # 1 15 MW 27.01.1961
U # 2 15 MW 09.04.1961
U # 3 15 MW 11.05.1963
The transmission lines form this stations include one feeder to Sengulam, one feeder to Muvattupuzha/ Adimali, one feeder to Udumbannoor, and two feeders to Kuthungal Powerhouse, all at at 110 kV level. The tailrace discharge is led to Mudirapuzha river and is flowing downstream to join Periyar river. Further power production from this waters take place at Lower Periyar powerhouse.
The generating units in the station were renovated during 2004 - 2006 period after 43 years of operation. The capacity of the units were raised to 17.55 MW each, raising the installed capacity to 52.65 MW.
AFTER RENOVATION
Unit Rating Date of Commissioning
after renovation
U # 1 17.55 MW 20.10.2004
U # 2 17.55 MW 31.11.2005
U # 3 17.55 MW 29.09.2006
Installed capcity 52.65 MW
Firm Annual Generation Capabplity 237 MU
NERIAMANGALAM EXTENSION SCHEME ( 1x 25 MW)
The Neriamangalam Extension Scheme with one unit of 25 MW was commissioned on 27.05.2008. The project was conceived as a solution to prevent spill from the Kallarkutty reservoir during intense monsoon. The powerhouse building is made adjacent to the Neriamangalam Powerhouse. The turbine used is vertical shaft Francis type.
Installed capcity 25 MW
Firm Annual Generation Capabplity 58.27 MU
Generation in Mu for the last Five years from Neriamangalam + NES Power station
Year 2009-10 2010-11 2011-12 2012-13 2013-14 2014-15
Genearion in Mu 336.16 370.51 360.530 231.71 365.75 346.29  
LOWER PERIYAR HYDRO ELECTRIC PROJECT
PAMBLA RESERVOIR
The reservoir for this project is formed by the Pambla dam constructed at Pambla , across the Periyar river. The main inflow to this reservoir is from the tailrace discharge of Neriamangalam powerhouse.
Full Reservoir Level (FRL)   253 m
Minimum Drawdown level (MDDL)   237.7 m
Effective Storage at FRL   4.55 MCM
Generation potential at FRL     2.09 MU
LP Power House
Place Karimanal
Village Kanjikuzhy
Panchayath Kanjikuzhy
Taluk Idukki
District Idukki
installed capcity 3 x 60 MW= 180 MW
Firm Annual Generation Capability 493 MU
Avearge net head 203.6 metre
Prime mover Vertical Shaft Francis Turbine
Date of Commssioning of units
Unit Rating Date of Commissioning
after renovation
U # 1 60 MW 27.09.1997
U # 2 60 MW 22.10.1997
U # 3 60 MW 28.11.1997
Power evacuation
Power generated is evacuated through Six feeders at 220 kV level.
Tail Race Discharge
The tail race discharge from this powerhouse is released to Periyar river and collected in a barrage at Bhoothathankettu, for irrigation purpose as part of Periyarvalley irrigation project, alongwith discharge from Idamalayar Power station.
Generation in Mu for the last Five years from Lower Periyar Power station
Year 2009-10 2010-11 2011-12 2012-13 2013-14 2014-15
Genearion in Mu 525.25 616.050 648.64 356.49 600.74 577.50
IDAMALAYAR HYDRO ELECTRIC PROJECT
The reservoir for this project is constituted by Idamalayar dam constructed at Ennakkal, across the Idamalayar river a tributory of Periyar river. The reservoir in addition to its own catchment area, receive inflow from the spill of Poringalkuthu dam also, through an open channel constructed at "watchmaram". The tailrace discharge from this powerhouse is released to Idamalayar and reaches Periyar and collected in a barrage at Bhoothathankettu in Periyar, for irrigation purpose as part of Periyar Valley Irrigation Project (PVIP).
IDAMALAYAR POWER STATION
Place Idamalayar
Village Kuttampuzha
Panchayath Kuttampuzha
Taluk Kothamangalam
District Ernakulam
Installed capacity 75 MW
Annual Generation capability 380 MU
Average net head 110 metre
Prime mover Vertical Shaft Francis
Full load discharge one one machine 41.67 m3 / Sec
IDAMALAYAR RESERVOIR
Location Ennakkal
Water Spread Area 28.3 Sq. Km.
Catchment Area   481.79 Sq. Km.
Full Reservoir Level (FRL)   169 m
Minimum Drawdown level (MDDL)   115 m
Effective Storage at FRL   1017.80 MCM
Dead Storage   72 MCM
Generation potential at FRL     254.45 MU
               
Unit Rating Date of Commissioning
after renovation
   
U # 1 37.5 MW 03.02.1987    
U # 2 37.5 MW 28.02.1987    
Power evacuation    
Power generated is evacuated through two 110 kVfeeders and one 66 K.V feeder
Generation in MU for the last six years from Idamalayar power station
Year 2009-10 2010-11 2011-12 2012-13 2013-14 2014-15
Generation in MU 333.92 376.900 348.98 249.62 385.99 372.56