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Experience of NTPC
Setting up Large scale Solar-Wind
Hybrid Project
22/11/2017 Presented by : Mr. N.S.P. Singh
AGM, PE-Wind
NTPC
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NTPC at a glance
The total installed capacity of the company is 51,708 MW { 29 coal based (including JV), 7 gas based stations
1 Hydro based station
1 Wind based station
11 Solar PV projects. }
Projects under implementation including JV and subsidiaries in
total are about 19,654 MW, and the long term corporate plan is
to be a 130 GW company by 2032.
We envision a diversified fuel mix and are committed to attain
nearly 30% generation capacity from non-fossil fuel resources by
year 2032 in turn lowering carbon footprint by reducing GHG
emissions.
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Moving Towards Renewable Energy
Adapting innovative technologies for blending thermal power with wind & solar energy generation
Supporting factors:
• Remotely located – Higher Land availability
• Existing power evacuation facility
• Capability to invest in larger CAPEX projects
Case Study: USAID PACE-D Program provided Technical Assistance in drafting Detailed Feasibility Report and Bid document
“NTPC’s Wind-Solar hybrid project (252 MW )”
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Advantages of Wind-Solar Hybrid
Increased output
(MWh)/km2
Savings on Evacuation
System Costs
More balanced
power mix for sale
Reduced ‘OPEX’ due to shared services
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Wind-Solar Hybrid: Basic Design Approach
1 • Maximize Wind Generation in the Given Area
2 • Leave space around WTG before placing solar (Shadow Analysis)
3 • Optimize Solar Capacity for high Generation, low
Cost (DC:AC ratio, pitch angle)
4 • Optimize AC system to Pooling Station
5 • Design Common Services and Facilities
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Wind-Solar Hybrid: A Typical Hybrid Block
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PVsyst Analysis: Solar Module Placement Approach Approach
140 Meters square area was kept empty
Near shading loss = 1.6%, which is just
0.2% greater than 171 meters
Solar capacity = 178 MW AC
Energy generation = 378,868 MWh per
annum.
171 meters Radius area was kept empty
Near shading loss = 1.4%
Capacity= 89 MW AC
Energy generation = 190,050 MWh per
annum.
It clearly shows a potential to pack solar capacity by choosing to leave just
the operating space, depending on the land availability and the goals for
balancing generation.
Comparative study
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NTPC Kudgi: Project site for Wind-Solar Hybrid
Site Characteristics
Site Location NTPC Kudgi, Bijapur, Karnataka
Site Co-ordinates 16.15 degrees North and 75.84
degrees East
Terrain Type Simple/Plain Terrain having
power plant structures
Contiguous/ Non-contiguous
land Non-Contiguous
Water Bodies -Nil- (Within the periphery)
Obstacles Power plant chimney & other
associated structures
Elevation (m.a.s.l) 488-587m
Wind Direction Predominantly West
Distance of built-up structures Within the periphery
Nearby WTGs of OEMs No other wind farm exists in the
vicinity
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NTPC Kudgi: Wind Micrositing
Wind farm
Capacity (MW) 60
No. of WTGs 30
Proposed WTG
Rating (MW) 2.0
Proposed WTG
locations
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NTPC Kudgi: Solar PV Layout
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NTPC Kudgi: Solar PV selected Case Analysis
Total Generation
AC:DC ratio 1:1.35
Tilt Angle (Degree) 10
Pitch (m) 7.5
Installed Capacity MWp
DC 259.2
Installed Capacity MW
AC 192
Total Gen (GWh/Yr) 358.7
Parameters Values
AC to DC ratio 1:1.35
PV module 320 Wp
Installed capacity (kWp) DC 8102
Installed capacity AC (kW) 6000
Module efficiency at STC (%) 16.67%
Capacity Utilization Factor (CUF) at P75 18.20%
Solar Resource For fixed tilt
angle 10o
Effective global irradiance incident on
collector plane (kWh/m2) 1933.7
First Year Energy Output at Inverter
Output (MWh/annum) 13570
Specific energy production
(kWh/kWp/year) 1640
Performance Ratio 79.57%
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PVsyst output AC:DC ratio of 1:1.35
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Final hybrid capacity mix
The total capacity of solar-wind hybrid project is 252 MW
leading to AEP of 603.32 GWh per year.
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Estimated tariff for Hybrid project
Tariff (INR / kWh)
Without Land
Cost
With Land
Cost
Solar 3.44 4.56
Wind 3.06 3.57
Overall LCOE 3.32 4.25
Cost Saving due to shared Infrastructure
•There will be no extra cost to develop high voltage power evacuation
infrastructure for the wind power project.
•Capital cost savings on other infrastructure such as roads, security,
plant control, spares warehousing, energy storage; forecasting and
scheduling.
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International Competitive
Bidding to be conducted
Tender will be issued for LSTK
(Lump sum Turnkey) EPC
contractor, for the entire plant
up to Pooling SS
Bidders to quote for EPC + 10
Years OMS contract.
Consortium Allowed
NTPC Kudgi: Wind-Solar Hybrid Bidding Approach
Evaluation Criteria V = (EPC Contract Value with taxes + PV of 10
yrs of O&M Expenses)/(KWh generated over 10
years)
The lowest V would be the winner
The forecast generation figures would become the basis
for Performance Guarantees (peak capacity, performance
ratio, power curve tests, plant availability, degradation
etc.)
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1. Power Sale- Recognition of Large Consumer to purchase
power.
2. Metering – Metering to be done independently for wind
and solar/ combined Metering. Discom discussions to
take place
3. Regulation – The Policies which setup directives are in
draft stage and expected to be finalized before the project
gets implemented.
Resolution of issues such as RPO fulfillment, Long Term Transmission capacity allocation, Metering, Scheduling and
Forecasting etc. would likely be clarified.
Issues requiring further work
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Some Pictures from Site Visit
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THANK YOU