Engineering Services
The Detailed Project Report (DPR) is prepared for developing a 320 Mw run -of-river hydroelectric power project by constructing a gravity dam across River Godavari at Dummugudem village, Khammam district in Andhra Pradesh for APGENCO. The Detailed Project Report (DPR) is prepared by ConTec in line with the Guidelines laid down by Central Electricity Authority (CEA) for formulation of Detailed Project Report (DPR)s for Hydro Electric Schemes, in compliance with the requirement of Section 8 of the Electricity Act, 2003.
The 2500 Cr. project envisages construction of a gated spillway in the deepest course of River Godavari, sandwiched between concrete overflow sections (auxiliary spillways), with a bridge proposed to connect with the earth and rock fill dam on both sides to pass a design discharge of about 1,00,000 cumecs. The power house is located within the concrete non overflow section on the right bank immediately after the right concrete overflow section. The work is done for Andhra Pradesh Power Generation Corporation (APGENCO).
TThe objective of the Detailed Project Report (DPR) is prepared for developing a run -of-river hydroelectric power project by utilizing the head created by construction of a gravity dam across river Godavari at Kantanapally village, Warangal district in Andhra Pradesh for APGENCO. The study aims at providing the best and most suitable option and specify the design features for optimum overall river basin development of the river for power generation.
The Detailed Project Report (DPR) is being prepared by ConTec in line with the Guidelines laid down by Central Electricity Authority (CEA) for formulation of Detailed Project Report (DPR)s for Hydro Electric Schemes, in compliance with the requirement of Section 8 of the Electricity Act, 2003. The work is done for Andhra Pradesh Power Generation Corporation (APGENCO).
ConTec prepared the detailed project report and detailed engineering for Dummugudem multipurpose project for a value of by construction of a Barrage across river Godavari, 200 m downstream of existing anicut for the I&CAD department of Telangana. Administrative approval for an amount of Rs. 3481 Crs. was granted by Telangana Government and the project is being grounded. Scope of work included Geospatial survey by UAV Photogrammetry, detailed engineering & preparation of DPR including: 1. Construction of Barrage 2. Hydropower Generation & Navigation. 3. Study of Regional geology & topography. 4. River hydrology & design flood. 5. River basin Development. 6. Design engineering & project facilities (Irrigation, Hydropower & Navigation). 7. Power potential & installed capacity. 8. Project implementation methodology. 9. Techno Economic Viability.
This Small Hydel Scheme is a run-of-the river development and is proposed using the Gross head of 9.25m in the Devapur Nala. Devapur Nala is a major Nala joining the river Krishna and has its origin near Hunsagi in Shorapur taluk of Gulbarga district. The scheme utilizes seasonal monsoon discharges of the river mainly from southwest monsoon and regenerated flows from Narayanpur Left Bank Command Area, surplus discharges from Narayanpur reservoir & existence of springs in upper catchments of Devapur Nala.
To make available a FRL of + 367.45 at the intake, a gated weir with five vents with pond level at +367.50 is provided. On upstream side afflux bunds are provided on either side with TBL at +369.50. A Regulator cum Single Lane Bridge with seven vents is proposed on right side of the weir to draw discharges into approach channel. The approach channel connects to power house via Intake pool into two units of power house on the right side of the stream to draw the required discharges. The powerhouse is located on the right side of the Devapur Nala. This powerhouse utilizes economically exploitable gross head of 9.25 m. The powerhouse is designed to provide with two units of 2500 KW rated capacity full vertical Kaplan turbines based on the discharge in the river. The developer is M/s South-West Hydro Power Private Limited.
The proposed Nandikere Small Hydro Project (NSHP) is proposed on the left bank of Cauvery river near Dhanagur village, Malavalli Taluk, Mandya District. The scheme envisages construction of a Power House with an installed capacity of 24.50 MW. The main components of NSHP are : • Diversion Weir across River Cauvery • Intake including Penstocks • Power House to house 5 generating units of 4.9 MW each • Tailrace pool and open tail channel • An outdoor yard (ODY) • Transmission lines and Substation
Kaveri river flows for a length of 320 km in the State. The river flows through the states Karnataka and Tamilnadu in the southeastern direction to its entrance into the Bay of Bengal near Cuddalore, Tamilnadu. Water is drawn from Cauvery river at Shiva Anicut for power generation at Shiva Power House and Shimsha Power House and also for drinking water supply to Bangalore. Out of this water drawn from Shiva Anicut about 26 cumecs is fed into Netkal Feeder for power draft at Shimsha Power House (9 cumecs) and for Bangalore water supply (17 cumecs) and about 15% increase is estimated for future demand of Bangalore water supply. The balance quantity of the water is led back into river Cauvery after power generation.
The FRL of diversion structure is fixed at + 413.80 m. The level is fixed based on the tail water level of the existing / proposed Small Hydel Scheme on the upstream side of Nandekere Small Hydel Project and head water level of the proposed Chikka Small Hydel Scheme on the downstream side. The tail water level in the short tailrace channel downstream of the power house while passing the design discharge through the units will be about + 403.50 m. Therefore, the gross head available for power generation would be 10.30 m. The loss of head through penstock, bends, trash rack, intake, gates, draft tube etc., is estimated to be about 0.50 m. Thus, the net head for power generation works out to about 9.80 m. The developer is M/s XS Hydro Energy Private Limited.
The proposed plant is at the tail end of power canal coming from Donkaraya dam feeding the water to forebay reservoir of lower sileru power house. From the hydraulic particulars, it is possible to get a maximum discharge of 127.4 cumecs (4,500 cusecs) and an average of 93.91 cumecs (3316 cusecs) for power generation. An average of 2.77 m head is available as difference of upstream water level and forebay reservoir level. At plant site it is proposed to have a power house integrated with an intake structure to form a forebay with water level at + 283.769 m (931’ 00”). The Power House will be located in the existing Forebay Reservoir.
The proposed plant is located at the Guntawada reservoir of intake regulator of Upper Sileru Hydro Power project. Considering difference in water levels at upstream and downstream side of intake regulator, a head of 5.0 mtr is available. This head has been proposed to be utilized for power production. The discharge is ensured as the water is passed for power production at Upper Sileru Reservoir.
The developer is M/s Krishnapriya Power Private Limited.
The proposed hydro electric power project is a run of the river project. The proposed site is near Pentlametta Village, Parvathipuram Mandal in Vizianagaram District and it is situated at a distance of about 4.5 Kms. from Thotapalli barrage and is about 3.5 Kms upstream of the existing 1.725 Mw Sardar Power Project. The power house is proposed 500m downstream of the proposed weir on the left bank. An intake regulator is proposed in line with the weir with an approach channel leading to the power house. The tail race is proposed to be joined back into the river 850 m downstream of the proposed weir. Two nos. horizontal tubular turbines are proposed, each with design discharge of 19.50 cumecs and rated head of 4.20 mtr. The rated plant discharge is 39.00 cumecs with rated plant power output of 1.40 MW.
The developer is M/s PVK Engineers Private Limited.
The Seethanagaram Anicut small hydro-electric project is proposed near Venkatabhairipuram Village, Makkuva Mandal in Vizianagaram District. The proposed project site is situated at a distance of about 17 Kms. from Bobbili town and is about 10 Kms downstream of the existing Vengalaraya Sagar reservoir project. The surplus releases from the Seethanagaram Anicut will only be utilized for power production at the proposed Seethanagaram small hydro-electric project. It is a run of the river project utilizing the differential head due to the existing Anicut. The rated design discharge is 35.00 cumecs for the scheme and 17.50 cumecs for each vertical full Kaplan turbine. The rated head for the scheme is 11.45 mtr and two units of 1.75 MW are proposed.
The developer is M/s Tungapadu Power Private Limited.
The proposed mini hydel project is a run of the river project utilizing the flows in the Eddu Vagu Stream. The Eddu Vagu is one of the tributaries joining the Krishna River on the right bank near Bayyaram village in Guntur District of Andhra Pradesh. The stream receives flows due to rainfall in its own catchment and excess flows from Nagarjuna Sagar Right Bank Main Canal (NSRBMC) through the regenerated flow from the irrigated lands finding escape into this stream. The head is available mainly due to longitudinal bed gradient along the course of the stream. The proposed weir site is near Bayyaram village at 3.60 km downstream of Kattamuru Bridge and power house is proposed 100 mtr downstream of weir location. The designed discharge is 52.00 cumecs and gross head is 6.5 mtr. Two units of 1.4 MW are proposed for the set up.
The developer is M/s Sindhu Power Systems Private Limited.
The proposed hydel scheme is a canal based scheme, which utilized the releases for drinking and irrigation purpose released water from Akkampally Balancing Reservoir (AKBR). The head availability is there due to level difference in Reservoir and the canal. Based on study a net head of 11.2 mtr is available. The discharge of 35 cumecs is available during irrigation period of 120 days and during remaining period 10 cumecs of discharge is available. Based on discharge and head availability, two units each of 1.5 MW capacity are proposed at the site.
The developer is M/s Pakeeza Infrastructure Development Company Private Limited.
Geospacial Survey
The Detailed Project Report (DPR) is prepared for developing a 320 Mw run -of-river hydroelectric power project by constructing a gravity dam across River Godavari at Dummugudem village, Khammam district in Andhra Pradesh for APGENCO. The Detailed Project Report (DPR) is prepared by ConTec in line with the Guidelines laid down by Central Electricity Authority (CEA) for formulation of Detailed Project Report (DPR)s for Hydro Electric Schemes, in compliance with the requirement of Section 8 of the Electricity Act, 2003.
The 2500 Cr. project envisages construction of a gated spillway in the deepest course of River Godavari, sandwiched between concrete overflow sections (auxiliary spillways), with a bridge proposed to connect with the earth and rock fill dam on both sides to pass a design discharge of about 1,00,000 cumecs. The power house is located within the concrete non overflow section on the right bank immediately after the right concrete overflow section. The work is done for Andhra Pradesh Power Generation Corporation (APGENCO).
TThe objective of the Detailed Project Report (DPR) is prepared for developing a run -of-river hydroelectric power project by utilizing the head created by construction of a gravity dam across river Godavari at Kantanapally village, Warangal district in Andhra Pradesh for APGENCO. The study aims at providing the best and most suitable option and specify the design features for optimum overall river basin development of the river for power generation.
The Detailed Project Report (DPR) is being prepared by ConTec in line with the Guidelines laid down by Central Electricity Authority (CEA) for formulation of Detailed Project Report (DPR)s for Hydro Electric Schemes, in compliance with the requirement of Section 8 of the Electricity Act, 2003. The work is done for Andhra Pradesh Power Generation Corporation (APGENCO).
ConTec prepared the detailed project report and detailed engineering for Dummugudem multipurpose project for a value of by construction of a Barrage across river Godavari, 200 m downstream of existing anicut for the I&CAD department of Telangana. Administrative approval for an amount of Rs. 3481 Crs. was granted by Telangana Government and the project is being grounded. Scope of work included Geospatial survey by UAV Photogrammetry, detailed engineering & preparation of DPR including: 1. Construction of Barrage 2. Hydropower Generation & Navigation. 3. Study of Regional geology & topography. 4. River hydrology & design flood. 5. River basin Development. 6. Design engineering & project facilities (Irrigation, Hydropower & Navigation). 7. Power potential & installed capacity. 8. Project implementation methodology. 9. Techno Economic Viability.
Project Management
This Small Hydel Scheme is a run-of-the river development and is proposed using the Gross head of 9.25m in the Devapur Nala. Devapur Nala is a major Nala joining the river Krishna and has its origin near Hunsagi in Shorapur taluk of Gulbarga district. The scheme utilizes seasonal monsoon discharges of the river mainly from southwest monsoon and regenerated flows from Narayanpur Left Bank Command Area, surplus discharges from Narayanpur reservoir & existence of springs in upper catchments of Devapur Nala.
To make available a FRL of + 367.45 at the intake, a gated weir with five vents with pond level at +367.50 is provided. On upstream side afflux bunds are provided on either side with TBL at +369.50. A Regulator cum Single Lane Bridge with seven vents is proposed on right side of the weir to draw discharges into approach channel. The approach channel connects to power house via Intake pool into two units of power house on the right side of the stream to draw the required discharges. The powerhouse is located on the right side of the Devapur Nala. This powerhouse utilizes economically exploitable gross head of 9.25 m. The powerhouse is designed to provide with two units of 2500 KW rated capacity full vertical Kaplan turbines based on the discharge in the river. The developer is M/s South-West Hydro Power Private Limited.
The proposed Nandikere Small Hydro Project (NSHP) is proposed on the left bank of Cauvery river near Dhanagur village, Malavalli Taluk, Mandya District. The scheme envisages construction of a Power House with an installed capacity of 24.50 MW. The main components of NSHP are : • Diversion Weir across River Cauvery • Intake including Penstocks • Power House to house 5 generating units of 4.9 MW each • Tailrace pool and open tail channel • An outdoor yard (ODY) • Transmission lines and Substation
Kaveri river flows for a length of 320 km in the State. The river flows through the states Karnataka and Tamilnadu in the southeastern direction to its entrance into the Bay of Bengal near Cuddalore, Tamilnadu. Water is drawn from Cauvery river at Shiva Anicut for power generation at Shiva Power House and Shimsha Power House and also for drinking water supply to Bangalore. Out of this water drawn from Shiva Anicut about 26 cumecs is fed into Netkal Feeder for power draft at Shimsha Power House (9 cumecs) and for Bangalore water supply (17 cumecs) and about 15% increase is estimated for future demand of Bangalore water supply. The balance quantity of the water is led back into river Cauvery after power generation.
The FRL of diversion structure is fixed at + 413.80 m. The level is fixed based on the tail water level of the existing / proposed Small Hydel Scheme on the upstream side of Nandekere Small Hydel Project and head water level of the proposed Chikka Small Hydel Scheme on the downstream side. The tail water level in the short tailrace channel downstream of the power house while passing the design discharge through the units will be about + 403.50 m. Therefore, the gross head available for power generation would be 10.30 m. The loss of head through penstock, bends, trash rack, intake, gates, draft tube etc., is estimated to be about 0.50 m. Thus, the net head for power generation works out to about 9.80 m. The developer is M/s XS Hydro Energy Private Limited.
The proposed plant is at the tail end of power canal coming from Donkaraya dam feeding the water to forebay reservoir of lower sileru power house. From the hydraulic particulars, it is possible to get a maximum discharge of 127.4 cumecs (4,500 cusecs) and an average of 93.91 cumecs (3316 cusecs) for power generation. An average of 2.77 m head is available as difference of upstream water level and forebay reservoir level. At plant site it is proposed to have a power house integrated with an intake structure to form a forebay with water level at + 283.769 m (931’ 00”). The Power House will be located in the existing Forebay Reservoir.
The proposed plant is located at the Guntawada reservoir of intake regulator of Upper Sileru Hydro Power project. Considering difference in water levels at upstream and downstream side of intake regulator, a head of 5.0 mtr is available. This head has been proposed to be utilized for power production. The discharge is ensured as the water is passed for power production at Upper Sileru Reservoir.
The developer is M/s Krishnapriya Power Private Limited.
Value Engineering
Lower Jurala Hydro Electric Project is a major on-going Hydro Electric Project near Mulamalla Village, Atmakur Mandal, Mahabubnagar district in Telangana state. The project is located 7.9 Kms Downstream of existing Priyadarshini Jurala Project. It’s a 240 MW project with 6 nos. Kaplan Bulb Turbines each of capacity 40 MW.
The weir crest level is at +299.00 Mtr and Maximum and Minimum tail water level are +279.65 and +273.65 Mtr. The tail race channel is 2000 mtr long with a bed width of 60 mtr and full supply depth of 8.90 mtr. The project construction was started in 2008, and already two nos. Kaplan Bulb Turbines have been commissioned. It has been found that observed tail water levels are higher than the designed levels, thus reducing the expected power output. ConTec has submitted a proposal for lowering the tail water level and augmenting the power potential or bringing it to the designed level. The proposal is being reviewed by the Telangana State Power Generation Corporation Limited (TSGENCO).
The project construction was started in 2008, and already two nos. bulb turbines have been commissioned. The first unit was synchronized in Dec 2013 and the second unit was synchronized in Jan 2014 and connected to the grid. Both the units were inundated on 30 July 2014 due to sudden floods. As an emergency measure for blocking flood water ingress and to undertake repairs in the power house due to inundation ConTec designed cofferdam With top level at +304.00 for Telangana State Power Generation Corporation Limited (TSGENCO).
Erstwhile APGENCO has taken up construction of weir across river Krishna about 14kms downstream of the existing Srisailam dam for storing the released water during the power generation mode. With the completion of tail pond, surplus electricity from the electricity grid would be used for pumping the water back to Srisailam reservoir and recycled for meeting peaking load on daily basis. During this time, the scheme works in pumping mode or special pump mode. The generators are designed to operate as an electric motor which rotates the turbines in reverse, and pumps water back into upper reservoir.
Thus surplus electricity is utilised to fill the reservoir, which can be used to meet the peak electricity requirements. ConTec was appointed as consultant for design and drawings in respect of right side abutment for protection of Srisailam Tailpond weir by Andhra Pradesh Power Generation Corporation (APGENCO).