Chalakudy Basin Hydro Electric Projects

                   
SHOLAYAR HYDRO ELECTRIC PROJECT            
Sholayar Hydro Electric Project is having installed capacity of 54 MW (3 X 18 MW). The reservoir is formed by the Sholayar dam constructed across sholayar river, one of the main tributaries of Chalakudi river.The station commenced operation in 1966, as the second power station in Chalakudi Basin
SHOLAYAR RESERVOIR
Water Spread Area 8.7 Sq. Km.
Catchment Area   186.6 Sq. Km.
Average Rainfall   3570 mm
Full Reservoir Level (FRL)   811.68 metre
Minimum Drawdown level (MDDL)   779.37 metre
Effective Storage at FRL   149.23 MCM
Energy Equivalent at FRL   102.4 MU
SHOLAYAR POWER STATION
Place Sholayar
Village Pariyaram
Taluk Mukundapuram
District Thrissur
Installed Capacity 54MW
Annual Generation Capability 233 MU
Average Net head 303 metre
Prime mover Vertical shaft Francis turbine
Water required in MCM for 1 MU Generation 1.5 MCM
Full load discharge for 1 machine 7.50 m3/ Sec
Date of commssioning  
Unit Rating Date of Commssioning
U # 1 18 MW 09.05.1966          
U # 2 18 MW 26.01.1968          
U # 3 18 MW 14.05.1968          
Tail Race Discharge
The tail race dicharge joins Chalakudi river and flows to Poringalkuthu reservoir for power generation in the Poringalkuthu Powerhouse
Power evacuation: The Power generated in the station is evacuated through two 110 kV feeders. .
Generation in Mu for the last Six years from Sholayar Power station
Year 2009-10 2010-11 2011-12 2012-13 2013-14 2014-15
229.76 243.240 220.35 2009.27 233.62 237.93
PORINGALKUTHU HYDRO ELECTRIC PROJECT
Poringalkuthu Hydro Electric Project was commissioned in 1957 with an installed capacity of 32 MW (4 x 8MW). The modernisation and uprating work of 4 units at Poringlkuthu power station was complted in May 2015. The turbine used is of vertical shaft Francis type. The project utilises tailrace discharge from the Sholayar Powerhouse, Spill from the Sholayar Dam and rainfall recieved in its own catchment area. The reservoir is formed by the Poringalkuthu Dam constructed across Chalakkudi river. The station uses vertical shaft Francis turbine.
THE RESERVOIR
Water Spread Area 2.82 Sq. Km.
Catchment Area   512 Sq. Km.
Average Rainfall   3230 mm    
Full Reservoir Level (FRL)   424 m    
Minimum Drawdown level (MDDL)   405.8m    
Effective Storage at FRL   30.3 MCM    
Energy Equivalent at FRL   10.71 MU          
PORINGALKUHTU POWER STATION
Village     Pariyaram
Taluk Mukundapuram
District Thrissur
Average Net head 170 metre
Prime mover Vertical shaft Francis turbine
Water required in MCM for 1 MU Generation 2.66 MCM (for uprated machine )
Full load discharge for 1 machine 6.65 m3/ Sec (for uprated turbine )
Date of commissioning    
Unit Rating Date of Commssioning
U # 1 8 MW 06.03.1957
U # 2 8 MW 13.01.1958
U # 3 8 MW 24.04.1959
U # 4 8 MW 06.02.1960
RMU works were undertaken in the Power Station from February 2013. Units 1, 2, 3 & 4 have been renovated and the capacity of the units have been raised to 9 MW.
AFTER RENOVATION
Unit Rating Date of Commssioning
U # 1 9 MW 14.04.2014
U # 2 9 MW 15.08.2014
U # 3 9 MW 8.02.2015
U # 4 9 MW 29-5-2015
Installed Capacity 36 MW ( After renovation & Uprating )
Annual Generation Capability 191 MU
                     
PORINGALKUTHU LEFT BANK EXTENSION                    
The Poringalkuthu left bank extension project was made by laying an additional penstock from the Poringalkuthu reservoir and was done to avoid the spill from the dam during intense monsoon. power house comprises one unit of 16 MW capacity. After power generation, water from Poringalkuthu & PLBE is released to the Chalakudi River.
Installed capcity 1x16 MW
Firm annual Generation capability 74 MU
Prime mover Vertical shaft Francis turbine
Avearge net head 170 metre
Water required for 1 MU generation 2.57 MCM
Full load discharge 11.42 m3/ Sec
Date of commissioning
Unit Rating Date of Commssioning
U # 1 16 MW 20.03.1999
Power evacuation
The power generated at Poringalkuthu & PLBE station is transmitted through three 110 kV feeders.
Generation in Mu for the last Six years from Poringalkuthu & PLBE Power stations
Year 2009-10 2010-11 2011-12 2012-13 2013-14 2014-15
Generation in MU 264.78 308.260 269.28 228.39 236.85 258.47