first monitoring results of bifacial...

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FIRST MONITORING RESULTS OF BIFACIAL SYSTEMS IN DIFFERENT CONFIGURATIONS

BIFIPV workshop –Miyazaki 29-30/09/2016Y. Veschetti, H. Colin, N. Chaintreuil, V. Soulima- Samouillo,

A. Plissonnier, P. Lefillastre, O. Wiss, M. Joanny, F. Al-Sharkarchi


• MOTIVATION IN BIFACIAL CONCEPT AT CEA-INES

• OUTDOOR MONITORING OF SINGLE BIFACIAL MODULE

• NEW BIFACIAL SYSTEMS PRESENTATION

• FIRST MONITORING RESULTS

• CONCLUSION & PERSPECTIVES

OUTLINE

Yannick Veschetti – BIFIPV workshop –Miyazaki- 29-30/09/2016


INES: COVERING THE VALUE CHAINOUR MODEL :

COVERING THE COMPLETE VALUE CHAIN

PROCESSES

MATERIALS

SYSTEM

INTEGRATION

FIRST PROTOTYPES

MANUFACTURING

COMPONENTS

DEMONSTRATION



CEA-INES: STRONG INTEREST IN BIFACIAL

OUR MODEL :COVERING THE COMPLETE VALUE CHAIN

Cell level

Module level

System level

Development bifacial technologies (PERT & HJT)

Industrialization

Efficiency

Development of bifacial module

Efficiency

Weight

Certification

Bifacial optimization

Validation of bifacial technologies & potential

I-V monitoring of outdoor single module

New bifacial systems of 3KWp capacity (each)

Development of a simulation tool



OUTDOOR BIFACIAL MODULE MONITORING

• Installed in 2015

Bifacial optimized mountingstructure no shadowing

RENOLIT ALKORBRIGHTsynthetic roofing membrane

CEA bifacial modules: n-type, glass-glass, TPO Apolhya Solar from

CEA INES, Chambéry, France

2 bifacial modules working with high albedo

2 bifacial modules with black screenfor reference use



RESULTS

Outdoor monitoring over 13 days (J1 to J13, on April 2015)

Energy Yield(kWh/kWc)

GFront (W/m²)

GFront (W/m²)

Energy yield bifacial modules / reference modules

Reference modules


M, Joanny, G. Razongle,

Bifacial PV modules:

Measurement challenges,

TUV workshop photovoltaic module,

Nov 2015, Cologne, Germany & silicon

PV, Chambéry, 2016


3 kWcBIFACIAL 30° South

Portraitalbedo grass

1


PortraitAlbedo: white rocks

2


LandscapeAlbedo: white rocks

3



h2

4

3 kWcBIFACIAL vertical E/OAlbedo: white rocks

5

3 kWcMonofacial 30° South

PortraitNo albedo

R

GENERAL DESCRIPTION OF BIFACIAL SYSTEMS

Specific mounting structure

Minimize shading on the rear side of modules


Investigated parameters:

- Albédo: grass versus crushed white rocks

- Modules height: h1 (0.6m) & h2 (1.6m)

- Configuration: portrait versus landscape


BIFACIAL MODULES FABRICATION

60 fabricated modules:

Assembly line at CEA-INES


Voc

(V)

Isc

(A)

FF (%) P (W) BF

(%)

Average 38,5 8.8 76.7 26090

STD 0,05 0,019 0,002 0,6


SYSTEM OVERVIEW


Operational since 01-sept-2016

SYS-1: Portrait/grass groundSYS-2: Portrait/white rocks ground SYS-R: referenceSYS-2: Countryside/white rocks ground

SYS-V: vertical


SYSTEM OVERVIEW



• 12 modules (Peak Power ~ 3120Wp) in series

• Identical cabling length for each system

• DC/AC monitoring

• Tilted reference cells IKS SET Sensor

Front side and rear side (3 positions)

• Horizontal pyranometer

• FRONIUS IG+ 50V1 inverter (4KW nominal output)

• Module temperature sensor.

• Reference systems with mc-Si modules (260W)

• Output datas:

• DC/AC productions (/5s)

• Performance ratio (PR)

SUB-SYSTEM DESCRIPTION



• Rear irradiance variation with the position of the reference cell

• In this example, Grear = 6% to 13% of Gfront

Not being used so far in the data analysis

IRRADIANCE MEASUREMENTS

0

200

400

600

800

1000

1200

6:00 8:24 10:48 13:12 15:36 18:00

Irra

dia

nce

(W

/m²)

Front & Rear irradiance 2016-09-22

Front Rear-Bottom Rear High Rear-Middle

0

20

40

60

80

100

120

140

06:00:00 08:24:00 10:48:00 13:12:00 15:36:00 18:00:00

Irra

dia

nce

(W

/m²)

Rear irradiance 2016-09-22

Rear-Bottom

Rear High

Rear-Middle



BEHAVIOUR FOR VARIOUS WEATHER CONDITIONS


1


2


3

vertical E/OAlbedo: white rocks

V

MonofacialPortrait

R


Po

we

r

07/09: Sunny

19/09: Cloudy

18/09: Rainy

AC

DC


DAILY PRODUCTION FOR SUB-SYSTEMS


0,0

5,0

10,0

15,0

20,0

25,0

Rainy Sunny Cloudy

DC

pro

du

ctio

n (

KWh

)

SYS-1 Sys-R SYS-2 SYS-3 SYS-V


1


2


3

vertical E/OAlbedo: white rocks

V

Monofacial PortraitNo Albedo

R

0,0

5,0

10,0

15,0

20,0

25,0

Rainy Sunny Cloudy

AC

pro

du

ctio

n (

KWh

)

SYS-1 Sys-R SYS-2 SYS-3 SYS-V


DAILY ENERGY GAIN VS REF SYSTEM


9,110,5 9,9

13,8 13,4 12,9

9,3

12,911,7

1,7 4,5

-17,9

-20,0

-15,0

-10,0

-5,0

0,0

5,0

10,0

15,0

20,0

Rainy Sunny Cloudy

DC

en

ergy

gai

n (

%)

SYS-1 SYS-2 SYS-3 SYS-V

28,8

7,3 9,8

40,2

12,915,7

38,7

12,415,2

22,4

4,3

-16,3

-20,0

-10,0

0,0

10,0

20,0

30,0

40,0

50,0

Rainy Sunny Cloudy

AC

en

ergy

gai

n (

%)

SYS-1 SYS-2 SYS-3 SYS-V

Reminder:

SYS-1 = Portrait/grass ground

SYS-2 = Portrait/white rocks ground

SYS-3 = Country/white rocks ground

SYS-V = Vertical/white rocks ground

• DC gain ~ 12 – 14% for best albedo

• DC gain ~ 10% for grass ground

• More variation in vertical system gain

• AC gain ~ 12 – 40% for best albedo

• AC gain ~ 7% - 29% for grass ground

• More variation in vertical system gain

Inverter sensitivity

Not optimized for reference and

vertical systems


ANALYSIS OVER 15 DAYS PERIOD

0

5

10

15

20

25

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Ener

gyp

rod

cuti

on

(KW

h)

SYS-2: portrait/white rocks albedo

• AC gain ~ 35% for best albedo

• AC gain ~ 23.5% for grass ground

• AC gain ~13.5% for vertical system

• DC gains more limited (up to 14%)

Large influence of inverter

-10,0

-5,0

0,0

5,0

10,0

15,0

20,0

25,0

30,0

35,0

40,0

SYS-1 SYS-2 SYS-V

Energy gain versus reference system (KWh)

DC production

AC production

0,0

50,0

100,0

150,0

200,0

250,0

SYS-1 SYS-R SYS-2 SYS-V

Cumulated production (KWh)

AC production

DC production



Summary:

• INES bifacial 3KWp systems can lead to a broad range of investigations

• Partially operational since 01/09, still requires a deeper data analysis

First results:

• High influence of the inverter dimension

• Related to the first results, the bifacial gain is:

~ 14% with crushed white rocks

~ 10% with synthetic grass

Perspectives:

• Inverter or modules adaptations.

• Long-term monitoring (week, month, year)

• Variation of albedo (black/white plastic sheets)

• Comparison of different bifacial modules technologies

• Albedo measurements

• Influence of rear shading and module height

• I-V monitoring of single module

CONCLUSION & PERSPECTIVES


• Validation of simulation tool

Simulation of module I-V curve

Simulation of systems

Commissariat à l’énergie atomique et aux énergies alternatives

Alternative Energies and Atomic Energy Commission 17 av des martyrs 38000 GRENOBLE France

http://liten.cea.fr

Établissement public à caractère industriel et commercial

Public establishment with commercial and industrial character

RCS Paris B 775 685 019

MERCI POUR VOTRE ATTENTION

THANKS FOR YOUR ATTENTION

INES Site

Institut National de l’Energie Solaire

National Solar Energy Institute

50 avenue du lac Léman

73375 Le Bourget-du-Lac France

+33 4 79 79 20 00

Acknowledgements:

- A. Roisin, J. Mattei,

A. Biron (CEA) for

bifacial system

fabrication

- BPI (Investisment

Public Banc) for

financing BIPPP

national Project

http://liten.cea.fr/

first monitoring results of bifacial...

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