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Tuesday, March 31, 2015

PERFORMANCE REPORT OF 1MW THIN FILM SOLAR POWER PLANT



PERFORMANCE REPORT OF 1MW THIN FILM SOLAR POWER PLANT
Dated: 17-01-2013
M/s Conflux infratech Pvt. Ltd, Village: khirva, Tahsil –Falodi, Dist: Jodhpur, State: Rajasthan(India)
 The above1MW thin film Solar Power Plant is situated at village Khirva between Falodi and Bap road, about 22km from Falodi. The geographical coordinate of Falodi are Latitude: 27.23N & Longitude: 72.36E . The environmental temperature varies from 0° to 48° degrees centigrade’s. The solar insolation in December is 4.12 KWh/M^2/day  and in May is 6.97 KWh/M^2/day. The average solar insolation is 5.55KWh/M^2/day. In December month Solar panels starts to produce energy from 8.00AM to 4.00PM (8.00 hours) & in June month from 6.30Am to 5.30PM.( 11.00 hours) The Solar power available in AC form after deducting losses i.e module mismatching loses, high temperature loses, dirt & dust loses, wiring loses, DC to AC conversion loses. So the conversion factor is assumed 0.77.  So annual production of1MW power plant will be = 1000x365x5.55x0.77 = 1559827KWh .The power performance can be improved by minimize above loses.
The said unit has 21.00 bigha land. It consists of 8550 Nos. 85watt & 3600Nos. 77.5watt  thin film solar cell modules of First solar company from USA. All modules are UL approved. These modules are south faced, mounted on 135 fix axis supporting structure, 6 strings in each structure. From 135 structures 14 are not working. The solar power via combiner boxes goes to two 500KW inverters, after inversion it goes to 1.2 MVA step up transformer to grid. Suitable disconnects are also available.
1.    Nos. of  85 Watt First Solar thin film modules           8550     Power – 726.750KW
2.     Nos. of 77.5 Watt First Solar thin film modules       3600      Power – 279.000 KW
                                                                                         Total    Power -1005.750KW

Less :1  Broken Modules:  85 Watts                            144       Power- 12.240Kw
              Broken module    77.5Watts                           167       Power- 12.942KW
                                                                                      Total                 25.182KW


Net available power :   980.568 KW   or 0.980568MW,  Say .98MW   


       



Conflex infratech Pvt, Ltd, Village: Khirva, Tahsil: Falodi, Dist: Jodhpur
(Comparison table between estimated & actual energy harvesting)
                                                                                     
Sn.
Months
Insolation- KWh/M^2/day
Estimated Power generation /MW
Actual power generation
Shortage
 % Short /Excess
1
Mar16-2012
6.04
74413
53650
20763
27.90
2
April-2012
6.73
155463
126997
28466
18.31
3
May-2012
6.97
166374
70945
85429
57.31
4
June-2012
6.55
151305
98885
52420
34.65
5
July-2012
5.46
130330
114700
15630
11.99
6
Aug-2012
5.42
129375
71136
58239
4502
7
Sep-2012
5.85
135135
91407
43728
32.36
8
Oct-2012
5.31
126750
122267
4483
03.54
9
Nov-2012
4.99
115269
113071
2198
01.91
10
Dec-2012
4.12
98344
114586
-16242
-16.52
11
Jan17-2013

56418
56262
156
00.28
KWh
Average
5.55
 1339176
1033800
305270
22.80







                                          I have inspected this unit on 17th January, 2013 at 3.00PM during sun peak hours. Unfortunately it was cloudy day so available power up to 3.00PM was only 2542.00KWh. This energy is developed by 0.98MW power module instead of 1.005MW power module. The total energy, 1033.800MWh is generated from 16th March,2012 to 17th Jan-2013 ( Ten months). If the broken modules are replaced, than 2% (1033800x0.02= 20676KWh) energy can be harvest more. Then it will be 1054.476MW. But still there is gap of (1339.176-1054.476=284.700MWh). From above table about 20% less energy is sold. There may be some mistakes in data logger reading and actual delivered energy to the PPA agency.
The Plant started since 16th March,2012. During this half month energy harvested was 53650KWh, which is 20763KWh less than estimated energy 74413KWh.  The % loss is 27.9. In May month % lose is 57.3, it show improper communication with PPA agency. August & September are rainy season months. October & November  it harvested better energy. In month of December 16% energy harvesting is more. This situation may be due to sunny days and full supply to grid.  During Jan17,2013 the energy harvesting is to the estimated level.
Findings:  There is no technical problem in Plant Machinery & erection. Lose of harvesting power is due to manual mistakes & communication gap between PPA authority.

Suggestions: 
1.    Broken modules should be replaced as soon as possible.
2.    Regularly clean modules from dirt & dust.
3.    Proper communication with electricity board to dispatch maximum harvested energy.
4.    By 2% extra modules for future breakages or for personal use.
5.    Single axis tracking can be used to improve the efficiency.
6.    One extra 1.2MVA  should be purchased in case of failure of plant transformer.

Enclosed: Insolation chart of Falodi

Preparedby:-


Chandanmal Jain +91 9829930553
B.E(Mechanical)
Solar Energy Consultant & Approved Valuer (P&M)
 Mahaveer Circle, Juna keradu marg
Barmert (Rajasthan)- India