1. 8th PV Performance Modeling and Monitoring Workshop in Albuquerque, Steffen Lindemann
Steffen Lindemann
Martin Hofmann
Rainer Hunfeld
Valentin Software
www.valentin-software.com
8th PV Performance Modeling and
Monitoring Workshop
2. 8th PV Performance Modeling and Monitoring Workshop in Albuquerque, Steffen Lindemann
Agenda
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• Company and Products
• Recent improvements
• One-minute resolution of irradiance and what it means
• Near shading objects - how PV*SOL deals with this
• PV is no longer only PV
3. 8th PV Performance Modeling and Monitoring Workshop in Albuquerque, Steffen Lindemann
Valentin Software
29
20
12
3
years experience
employees
more than 12.000 customers
business partners
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Professional tools for experts
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PV*SOL
Design Software for Photovoltaik Systems
... first version released in 1998
… is well well known and the results are accepted
… is used world wide as an important tool in the planning process
… has a high precision in calculation and simulation
… is easy to learn and to use
… calculates grid-connected and off-grid PV-plants,
with electrical appliances,
battery-systems,
electrical vehicles
… has huge databases
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Recent improvements
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• Exceedance probability for the forecast yield (P50/P90)
• Portuegese (the 7th language)
• Net-metering model
• Import of satelite data in 3D
8. 8th PV Performance Modeling and Monitoring Workshop in Albuquerque, Steffen Lindemann
Simulation in One-Minute resolution
• Simulation in One-minute-steps
sometimes can be the best choice
• And it’s easy in PV*SOL: only one click
• What have we done in the backgound?
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Synthesizing Algorithm
1. Analysis of each day of measurement
(Based on one-minute measurement values from BSRN)
2. Statistical analysis of hourly averaged kt
(clearness index) allows for detection of weather
situation
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10. 8th PV Performance Modeling and Monitoring Workshop in Albuquerque, Steffen Lindemann
Results - Realistic variability
Global irradiance data from Lindenberg,
May 14, 2005 (BSRN)
Measured 7.0
New (Hofmann) 8.2
Aguiar 13.1
Skartveit 16.6
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Results - High statistical quality
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RMSE of irradiance in %
Aguiar 0.530 596
Skartveit 0.684 862
Hofmann 0.210 207
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One-Minute resolution
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Source: PV-Symposium 2017, Jan Remund
Available in PV*SOL and also in Meteonorm 7.2
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June 18 - hrs
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June 18 - min
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June 18 - hrs
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June 18 - min
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Results of self-consumption
without batteries
Example of simulation results:
• Self consumption (hrs): 28.6%
• Self consumption (min): 22.4%
• Self sufficiency (hrs): 26.3%
• Self sufficiency (min): 20.5%
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June 18 with battery - hrs
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June 18 with battery - min
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20. 8th PV Performance Modeling and Monitoring Workshop in Albuquerque, Steffen Lindemann
Results of self-consumption
with batteries
• Example of simulation results:
• Self-consumption (hrs): 59.3%
• Self-consumption (min): 52.9%
• Self-sufficiency (hrs): 56.2%
• Self-sufficiency (min): 50.3%
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A very simple PV-plant
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PV is no longer only PV
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What have we done in PV*SOL?
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• Integration of electrical vehicles in our database
• Development of a mathematical modell
• Some easy inputs in the User Interface:
• Desired driving range per day
• Time at charging station
• Charging mode
What have we done in PV*SOL?
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Charging of the electric car with PV
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Example: Carpet plot with one-minute-values for one year
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Polystring – coming soon (Nov 2017)
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www.valentin-software.com
Tutorials on our YouTube-channel
„ValentinSoftware“
steffen.lindemann@valentin-software.com
Notas del editor
18 June
18 June
Hier sind es nur 25% Eigenverbrauch: Testen
19.June 11:00
Without shading: blue common stringinverter
Orange: With Power-optimizer
The same curves for horizontal and vertical cellstrings