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The Koyna Hydroelectric Project is the largest completed hydroelectric power plant in India. The project site is in Satara district near Patan. The Deshmukhwadi village on which koyna dam is situated is migrated on hill station near to Koyna Dam. The total capacity of the project is 1, MW. The project consists of four stages of power generation. All the generators are located in underground powerhouses excavated deep inside the mountains of the Western Ghats. A dam foot powerhouse also contributes to the electricity generation.
Due to the project's electricity generating potential the Koyna River is considered as the life line of Maharashtra.
The project takes advantage of the height of Western Ghats. Thus a very large hydraulic head is available over a very short distance. In the early 20th century, there was a survey of the Koyna River as a potential hydro-electric source. The financial crisis caused the project to be shelved. After the independence of India , it was taken over by the Government of Maharashtra. In Koyna Dam division started to look into the project.
The project was approved in and work commenced in early The project is composed of four dams with the major contributors being the Koyna Dam and Kolkewadi Dam. The water from Shivasagar reservoir was formed by the Koyna Dam and is used in the 1st, 2nd and 4th stages.
This water is drawn from head race tunnels situated below the reservoir. Then it travels through vertical pressure shafts to the underground powerhouses.
The discharged water from these stages is collected and stored in Kolkewadi Dam situated near village of Alore. The water is drawn from the penstocks of Kolkewadi Dam to an underground power station in the 3rd stage and then discharged to the Arabian Sea. The electricity generated in all the stages is delivered to the main electrical grid.
The project is run by the Maharashtra State Electricity Board. Details of each stage are given below. The first stage of the project was approved in late and construction began in early Initially a two-stage construction was conceived. But the total generation capacity of the two stages was too large for load forecasts of that time. So a time lag of more than 10 years was proposed between the two stages.
Within two years thereafter, it came to be noticed that the 10 years time tag between these two stages will not be affordable and to cope up with the power requirements, the two stages should be merged and both the stages should be constructed simultaneously. Hence, it was accepted that the two stages have to be executed as one. The 1st and 2nd stages share same powerhouse with total eight Pelton turbine units.
The water from Shivasagar reservoir is taken through an intake structure known as Navja tower near village of Navja into the head race tunnel. Then it travels towards the surge tank.
It is further divided into four pressure shafts which run vertically downward delivering water to the turbines. Then the water is discharged into the tail race tunnel. A dam foot powerhouse was also constructed which is used to generate electricity by the water which is discharged from the Koyna Dam for irrigation purpose.
This powerhouse is run according to the irrigation requirements of the downstream areas. Initially a weir was proposed to divert the water coming out of tail race tunnel of Stage I and II. To use this head, the Kolkewadi Dam was constructed at this location. It forms a balancing reservoir and maintains the head. This dam impounds the tail race water from Stage I and II. The tail race water from these stages then flows through a channel and joins the Arabian Sea near Chiplun.
Later in the s, the electricity demand of the Maharashtra increased tremendously resulting in inadequate power supply. Thus, one more stage called Stage IV was added to power system of Stages I and II, thus converting the Koyna Power Station into a peaking power station complex with load factor of about A nonconventional intake system was created by piercing the lake from the bottom by blasting the rock plug using dynamite. The water in head race tunnel is directly drawn from the reservoir and delivered to the head surge tank.
Then four pressure shafts take the water downward vertically. A revolutionary gas insulated switchgear system is used in the underground powerhouse of this stage. This stage is mostly used to cater for the peak hour demands of the electric grid. To utilise more water from the Shivasagar reservoir, another dam foot powerhouse is being constructed on the left bank of the dam. This powerhouse will employ a pumped storage scheme. Also lake tapping is proposed for the intake system.
The impounded water of the Koyna Dam though has submerged a significant amount of rain forest of the Western Ghats , it has helped a lot to the surrounding forest by supplying water all round the year. Hence a wide biodiversity of plants and animals is observed in the evergreen forest surrounding the reservoir area. This protective cover has enabled the emergence of a diverse variety of flora and fauna in the sanctuary. Some of the endangered species of trees found in the sanctuary are Dhup Boswellia serrata , Euphorbia longan , and Elaeocarpus spp.
The sanctuary has a diverse variety of fauna including tigers and panthers; gaurs and sambars; barking and mouse deer; pythons and cobras; common langurs and Indian giant squirrels. Many species of birds are found in the sanctuary including brown capped woodpecker; Asian fairy bluebird ; and crested goshawk. The legend states that the fort was constructed by Malwa king Raja Bhoja in When the project work was almost nearing completion, on 10 April , the then Prime Minister of India Pdt.
Jawaharlal Nehru visited Koyna Project. To commemorate this event a tablow was unveiled at his gracious hands on the right flank hillock of Koyna Dam. This project came up with an idea of immortalising this place and this event by constructing a beautiful park and naming it as "Nehru Memorial Park".
This park is a major attraction for tourists. An upstream side view of dam is visible from this garden. There is an auditorium named 'Yashogatha' meaning: story of success which reviles a small element of the tremendous efforts taken by the engineers and workers associated with project.
It is one of the most beauty in satara. Due to the large rainfall in the hilly region surrounding the reservoir, some beautiful falls are generated in the monsoon season.
This is also a major attraction for tourists visiting in monsoon season. From Wikipedia, the free encyclopedia. Main article: Koyna Wildlife Sanctuary. India portal Water portal Renewable energy portal.
Retrieved 29 October Infraline Energy. Retrieved 20 April Retrieved 29 December Categories : Hydroelectric power stations in Maharashtra Underground power stations Pumped-storage hydroelectric power stations in India. Namespaces Article Talk. Views Read Edit View history. Contribute Help Community portal Recent changes Upload file.
Category:Koyna Hydroelectric Project
The Second Koyna Hydroelectric Project in India will provide financing for the hydroelectric project, south east of Bombay in the state of Maharashtra. This project will consists of: a raising the height of the dam from elevation 2, feet to its designed height of 2, feet; b completing the Koyna underground power station and installing four 75 MW Pelton type turbo-generating sets with transformer equipment, c constructing a small power station at the base of Koyna dam with two Kaplan type turbo - generating units of 20 MW each; d expanding the k switchyard; e constructing a 45 mile kv double circuit line to the site of a new aluminum factory to be located at Jaigad; and f supplementing the transmission capacity toward Bombay. The demand for electricity in the Bombay-Poona area warrants substantial additions to generating capacity of the system serving this area as soon as possible. The completion of the second Stage of the Koyna development is the quickest and most economical method of providing this additional capacity. See Less -.
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The Koyna Hydroelectric Project is the largest completed hydroelectric power plant in India. The project site is in Satara district near Patan. The Deshmukhwadi village on which koyna dam is situated is migrated on hill station near to Koyna Dam. The total capacity of the project is 1, MW. The project consists of four stages of power generation.
NHPC plans 600 MW solar project at Koyna dam in Maharashtra
This report covers an appraisal of the first stage of the Koyna Hydro-Electric Power project for India which will include; a transmission line to Bombay, and a transmission line south of the project to serve a number of small towns, villages, and their Voir la suite This report covers an appraisal of the first stage of the Koyna Hydro-Electric Power project for India which will include; a transmission line to Bombay, and a transmission line south of the project to serve a number of small towns, villages, and their small industries. Stage I, now under construction, will have an installed capacity of MW; Stage II will provide an additional mw, and water storage for irrigation; Stage III will utilize the tailrace waters of the Stage II power plant and irrigation water, and it will add an additional 90 mw. The continually growing demand for power requires the provision of new generating capacity of the magnitude of Koyna and the development of this project is the most economical method of providing the power. All language versions and volumes across World Bank Repositories. Cette version est fournie uniquement pour accommoder les utilisateurs disposant de connections lentes. Legal Access to Information Jobs Contact.