spectral effects in hawaii - spectrafy | solarsim › wp-content › uploads › 2019 › 01 ›...
TRANSCRIPT
Overview
2
• Data measured at WCPEC-7 in Waikaloa, Hawaii
• SolarSIM-G mounted on tripod on the Lagoon Lanai
• Data acquired 11th-14th June 2018. 2s time resolution.
SolarSIM-G datasets: GHI and SCFs
3
• The SolarSIM-G resolves full-range global solar spectral irradiance (280-
4000nm).
• From that, GHI and spectral correction factors (SCF) for a range of PV panel
types are automatically calculated.
• SCFs convert large spectral datasets into simpler time series that can be
used like any other pro/derate.
• SCF > 1 = boost in PV performance. SCF <1 = reduction in PV performance.
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A· Bd C d
A· Cd B dSCF =
A = spectral response of PV panel
B = reference spectra
C = measured spectra
14th June 2018 SCF factors
4
• High SCFs before 10:15AM due to shade.
• Low SCFs from 10:15AM – 12:45PM due to volcanic smog.
0
100
200
300
400
500
600
700
800
0.7
0.8
0.9
1
1.1
1.2
1.3
9:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00
GH
I, W
/m2
Sp
ec
tra
l Co
rre
ctio
n F
ac
tor
Time of Day
FS Series 3+
FS Series 6
CS Poly
CS Mono PERC
CIGS
GHI
14th June 2018, 9:30AM spectra
5
• Low absolute irradiance due to shading.
• ‘Pointy’ spectral shape, dominated by diffuse light due to shading.
0
0.5
1
1.5
2
spe
ctr
al i
rra
dia
nc
e,
W/m
2/n
m
9:30AM Hawaii
AM1.5G
0
0.2
0.4
0.6
0.8
1
1.2
0 500 1000 1500 2000 2500
no
rmla
ize
dsp
ec
tra
l
irra
dia
nc
e
wavelength, nm
9:30AM Hawaii, norm.
AM1.5G norm
14th June 2018, 12:00PM spectra
6
• Irradiance unshaded but attenuated by vog.
• Relatively ‘flat’ spectra due to spectrally flat vog aerosol profile.
0
0.2
0.4
0.6
0.8
1
1.2
0 500 1000 1500 2000 2500
no
rma
lize
d s
pe
ctr
al
irra
dia
nc
e
wavelength, nm
Noon, Hawaii, norm.
AM1.5G, norm.
0
0.5
1
1.5
2
Sp
ec
tra
l irr
ad
ian
ce
,
W/m
2/n
m
12 noon, Hawaii
AM1.5G
13th June 2018 SCF factors
7
0
100
200
300
400
500
600
700
800
900
1000
0.8
0.9
1
1.1
1.2
1.3
9:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00 20:00
GH
I, W
/m2
spe
ctr
al c
orr
ec
tio
n f
ac
tor
time of day
FS Series 3+
FS Series 6
CS Poly
CS Mono PERC
CIGS
GHI
• A more ‘normal’ day. Under shade before 10:15AM.
• Clear sky period (10:48AM – 12:30PM) with SCF close to 1.
• Various shading (palm trees etc.) beyond 12:45PM.
13th June 2018, 12:00PM spectra
8
• High irradiance due to relatively clear sky.
• Spectra very similar to AM1.5G reference spectra, leading to SCF = 1
0
0.2
0.4
0.6
0.8
1
1.2
0 500 1000 1500 2000 2500
no
rma
lize
d s
pe
ctr
al
irra
dia
nc
e
wavelength, nm
12 noon, Hawaii, norm.
AM1.5G, norm.
0
0.5
1
1.5
2
Sp
ec
tra
l irra
dia
nc
e,
W/m
2/n
m
12 noon, Hawaii
AM1.5G
Other data: 10th June 2018
9
0
200
400
600
800
1000
1200
0.9
0.95
1
1.05
1.1
1.15
1.2
10:15 10:30 10:45 11:00 11:15 11:30 11:45
GH
I, W
/m2
spe
ctr
al c
orr
ec
tio
n f
ac
tor
time of day
FS Series 3+
FS Series 6
CS Poly
CS Mono PERC
CIGS
GHI
Other data: 11th June 2018
10
0
200
400
600
800
1000
1200
0.7
0.8
0.9
1
1.1
1.2
1.3
8:30 9:30 10:30 11:30 12:30 13:30 14:30 15:30 16:30 17:30 18:30 19:31 20:31
GH
I, W
/m2
spe
ctr
al c
orr
ec
tio
n f
ac
tor
time of day
FS Series 3+
FS Series 6
CS Poly
CS Mono PERC
CIGS
GHI
Other data: 12th June 2018
11
0
200
400
600
800
1000
1200
0.7
0.8
0.9
1
1.1
1.2
1.3
13:00 14:00 15:00 16:00 17:00 18:00
GH
I, W
/m2
spe
ctr
al c
orr
ec
tio
n f
ac
tor
time of day
FS Series 3+
FS Series 6
CS Poly
CS Mono PERC
CIGS
GHI
Spectral effect on daily GHI sums
12
Date GHI sum, kWh Spectrally effect on GHI Sum, %
FS S3+ FS S6 CS Poly CS Mono PERC CIGS
10th June 0.234 +5.19% +5.66% +3.48% +3.34% +3.42%
11th June 4.742 +2.22% +2.41% +1.43% +1.38% +1.48%
12th June 1.099 +5.33% +5.89% +3.44% +3.31% +3.41%
13th June 3.659 +2.31% +2.65% +1.50% +1.45% +1.49%
14th June 2.673 -0.86% -1.44% -0.10% +0.05% -0.12%
• Generally positive, except for the 14th, which was affected by vog.
• Larger effect for CdTe, versus Si and CIGS. Larger effect on cloudy
days.
Conclusions
13
• Global solar spectra were measured on the Lagoon Lanai at the Hilton Waikaloa Village Hotel, from 11th-14th June 2018.
• For the time period, instantaneous spectral correction factors varied
from 0.92 – 1.18.
• Particularly low spectral correction factors (~0.92) were observed
on June 14th, caused by volcanic smog from the Kilauea eruption.
• Generally, the spectral effect on daily GHI sums was positive. Higher
for CdTe vs. Si and CIGS. Greater effect on cloudy days.
