assignment (covering 55 projects in South India) was initially handled
by A.S.Chelvaraj (hydropower expert) and A.C.Sivaguru
for 3 years (1989-1992). It involved review of the design and
economics of 55 mini hydropower prospects
to be developed at existing irrigation dams and canals in states of
Andhra Pradesh, Karnataka, Tamilnadu, Kerala and Punjab with a total
potential of 131MW and 600GWh. Techno economic concepts
were applied to improve and standardize the electromechanical and
civil works designs and layout proposed
by SEBs to minimize investment requirements and thereby enhance
the economic merits of the prospective schemes. The scope also included
economic / financial evaluation and development of a comprehensive
pre-investment report with case studies on seven schemes entitled India
-Mini Hydro Development on Irrigation Dams and Canal drops for
consideration by International Financial Institutions.
report also addressed various policy issues like opening up
implementation to private sector, establishment of mini hydro cells and
cost centres within SEBs for investigating new schemes and demonstrating
the economic viability and return on equity for private investors.
findings and recommendations were accepted by The Government of India.
The World Bank, on the basis of guidelines recommended by this study,
released an amount of USD 142 Million to Government of India for
implementation. Most of the 55 projects have been implemented by IPPs
in 1995 were entrusted to review/revise the above study and develop a
series of interrelated software modules for Computer Aided Design of
Mini Hydro projects. The firm successfully completed the assignment and
delivered the software with requisite hardware for demonstration.
modules with their functional description and utility are given
below. The software is suitable for running on IBM PC compatible
and has an interface with AutoCAD for the generation of drawings
Creating computerized Database of the daily flow for a system of
irrigation dams and canals with summary, flow duration curve and
evaluation of energy curve for a given gross head.
Computes net head from Head duration curve, tailwater rating
curve and water conductor system losses.
Determines the optimum unit capacity, the number of units and
energy generated by each unit.
Selects the turbine with least runner diameter from a database
of standardized capacities (350, 650, 1000, 1250, 1500, 2000 and
3000kW) covering a wide range of equipment from various
straight flow tubular, right angle drive, siphon, open flume,
bulb, pit turbine, vertical Kaplan,
upstream elbow, downstream elbow etc.
Also selects generator type, speed, gearbox ratio and
evaluates unit dimensions.
Produces layout of power house, dimensions of power and tailrace
Selects standardized single line diagram with protection and
metering scheme. Grid Tie design with conductor details and
evaluates the performance and energy losses.
Computes quantities and cost of civil works with rate analysis
as input. Electromechanical equipment and grid tie cost is
calculated from a database of budgetary costs.
Performs Economic analysis by comparing with a diesel set of
equivalent capacity with Life Cycle costing. Also calculates,
Unit Benefit cost ratios, Energy productivity per unit
investment and Cost of generation. Financial analysis and Cash
flow is evaluated for various loan terms / conditions and
Sensitivity analysis for range of variation in parameters such
as interest rate, equipment cost, civil costs, loan period,
energy cost, inflation rate etc.
2002 SECSD Private Limited
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