3982 Venkat Rajaraman Solarsis Day 1

7/27/2019 3982 Venkat Rajaraman Solarsis Day 1

1/23

Global Solar EPC Summit

India, 201120-21st June 2011, Crowne Plaza, New Delhi

Renewable Markets IndiaIndias Green Business Centre

www.renewablemarketsindia.com


2/23

Performance of

Grid Connected Solar PV Plants

Have you gotten enough?


3/23

Solarsis We offer Concept-to-Completion services acrossvarious Solar Photovoltaic Technologies.

We offer extensive field experience in designing,procuring and installing solar plants. Our proven project

execution capabilities ensures efficient and timely

completion of the projects.

We also extend our strategic partnerships across theentire solar supply chain

Our system integration projects include grid-connectedplants, rooftop systems and Standalone power generation

plants.

We are one of the select System Integration companies inIndia that provide Financial Assistance for the Capital

intensive Solar PV projects both Debt and Equity

Financing.


4/23

Group Companies

Sri City is a world-class Integrated Business City spread over 100 sq.km. Sri

Citys strategic location near Chennai offers access to the best of both states.

iLabs Hyderabad Technology Center is an IT Park spread over 5.5 acres. iLabs

Centre provides premium office space for IT/ITES companies in Hyderabad and

Gurgaon.

Chintalapati Holding is a private company investing in India in a range of assetclasses, including Private Equity as a co-investor along with Peepul Capital Fund.

Peepul Capital LLC is an Institutional Investor. Some of the companies have

grown into world class organizations which was funded by Peepul Capital,

employing over 15000 employees.

The Associated Broadcasting Company Pvt Ltd (ABCL) is one of the fastest

growing media companies in India today.


5/23

Grid Connected Solar Power Plant

.2 MW Solar Power Plant in Tada Village

& mandal, Nellore Dist, AP

Under MNRE GBI scheme, solar power plant was operational Feb, 2011.

The plant is the first to use multiple technologies in India CdTe, c-Si,

Fixed Tilt and Tracking. First to commission using CdTe Thin-Film technology in the country.

Project commissioned on-time & within budget. Significant knowledgeof the functioning of different technologies in Indian conditions to helpus replicate multiple projects.


6/23

PV Plant, SriCity1MW Crystalline

Poly-Crystalline, 225Wp modules

750KW Fixed Tilt

250KW Tracking (Sun Power)

1MW Thin-Film

CdTe Technology

First Solar, 72.5, 77.5W modules

Plot Size: 9 acres4.0 acres: c-Si (25% TrackingSystem)

4.5 acres: CdTe

0.5 acres: Control Room, Switch

Yard.Peak Output:

c-Si: 1MWp

CdTe: 1MWp


7/23

Plant Performance Ratio May 2011

Performance Ratio =Actual Reading of Plant Output in KWh

Calculated, Nominal Plant Output in KWh

Average Performance Ratio = 82.6%


8/23

PV System Losses

PV Loss due to irradiance Level

PV Loss due to Temperature

Ohmic DC Wiring LossOhmic AC Wiring Loss

Inverter Efficiency Loss

Loss due to Inverter VoltageTransformer Loss

Transmission Line Loss

It takes only 2% change in PLF to take a project from cutting-edge to bleeding-edge & vice versa.


9/23

Module and Ambient Temp

Module Temp

Ambient Temp


10/23

Technology Selection

0.300

0.400

0.500

0.600

0.700

TempCoeff

Temp Coeff - CdTe Vs a-Si

Temperature Co-efficient: Power Pmpp ___ %/oC

Mostly specified at STC (1000 W/m2, 25 0C). Temp. is the module temperature. Temp. Co-efficient deteriorates with temp.

0.000

0.100

.

25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 65.0 70.0 75.0

Cell TemperatureCdTe Temp Coeff a-Si Temp Coeff c-Si Temp Coeff


11/23

Technology Selection

85.000

90.000

95.000

100.000

105.000

owerNomralizedt

o100W

Peak Power - Normalized to 100W

Typical Conditions: Solar Insolation : 700-900 Watts / M2

Day-time Ambient Temp Profile for about 7 months in a year: 36-43 oC.

Cell Temp = 70-75 oC.

75.000

80.000

25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 65.0 70.0 75.0

Pea

k

Cell Temperature (Degree C)CdTe Peak Power Normalized at 100W a-Si Peak Power Normalized at 100W c-Si Peak Power Normalized at 100W


12/23

Technology: Thin Film Vs c-Si

4.50

5.00

5.50

6.00

KWh/KWp

Technology: CdTe Vs a-Si

3.00

3.50

.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Month of May 2011

KWh/KWp (Thin Film) KWh/KWp (c-Si, Fixed)

Slightly better performance. CdTe is ~2.25% better


13/23

CdTe Technology

Optimum band gap of PV use Simple material system. Fewer

processing steps. Inexpensive

high throughput manufacturing Better suited for high temperature

and diffuse light use than c-Si Less material usage.

Demonstrated Cost Reduction.

Excellent under dustyenvironment Ideally suited for Indian

conditions Additional Revenue Generation

because of better temp. co-efficient under hot Indianconditions.


14/23

Irradiation Sensors Fixed Vs Tracking

Tracking

Fixed


15/23

Tracking Vs Fixed Performance

4.00

5.00

6.00

7.00

8.00

Wh/KWp

Fixed Vs Tracker

0.00

1.00

2.00

3.00K

Month of May 2011

KWh/KWp (Fixed) KWh/KWp (Tracker)

Single Axis Tracking: On Average is 23% better than Fixed Tracking


16/23

Central or String?

Central Inverter String Inverter

Costs (>2 MW) (


17/23

PV Central Inverters

200

400

600

8001000

1200

nsolation(W/m2)

Solar Insolation Data

Loads on the Inverters are not the same through-out the

day, as the solar insolation is not constant. Inverter Efficiency is not flat for all loads from 0-100%

At lesser input loads, the efficiency is less than the peakefficiency.

0I

Time


18/23

Solar Inverter: Multi-Master Inverter

Optimized inverter usage according to sunlight Altering start up sequence extends overall lifetime of set-up Allows repairs and maintenance without complete shut-

downs


19/23

Switch Yard & Transmission Line Losses

0.50%

1.00%

1.50%

2.00%

2.50%

3.00%

3.50%

Lossin%age

Switch Yard / Transmission Losses

Sub-station is 1.6KM away. 33KV over-head transmission line. 100 sq.mm, 3-run, AAA conductor. Average Loss is 2.63%

0.00%3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Month of May 2011

Switch Yard / Transmission Losses


20/23

Summary

It takes only 2% change in PLF to take a project fromcuttin -ed e to bleedin -ed e & vice versa.

Need to make sure that we are on the right side ofthis change!


21/23

Thank You!


22/23

Back-u Slides


23/23

Plant Performance Ratio

Average Solar Insolation per day = 6450 WhPeriod of observation = 11 days

Performance Ratio =Actual Reading of Plant Output in KWh

Calculated, Nominal Plant Output in KWh

3982 Venkat Rajaraman Solarsis Day 1

Documents

Transcript of 3982 Venkat Rajaraman Solarsis Day 1