8. Solar PV Simulation
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Transcript of 8. Solar PV Simulation
7/28/2019 8. Solar PV Simulation
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Shows the expected working of a system
Experimenting in real situations
Analyzing data and output to take technical
decisions
Optimize Parameter levels to get maximum
output
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w st = cos- 1{- tan(j - b )tand }
Most importantly…..to avoid such tedious
calculations and save our time !!
I total =
I 0(eqV /kT
-
1)-
I L
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PV Sol: easy to use software
PVSYST: An ‘all round’ simulator
RET Screen: Primarily a Financial Tool
Solar advisor model: Again a Financial tool for Solar PV
Solar Design Tool: An interactive online Simulator with3D analysis
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Easiest to use Interface
Best software for study, sizing, data analysis and
simulation
Extensive contextual help manual explaining all
the features of the software
Can display output in various forms
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• Preliminary Design:
Pre-sizing of a project without real components
• Project Design:
Fully featured study and detailed analysis of a
project
• Tools:
Contains tools for background data management
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Simulation for systems such as :
1. Grid Connected
2. Stand-Alone3. Pumping
are available.
Let us refer to these as System Types for
the rest of the discussion.
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Snapshot of PVSYST interface
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1. Select the location of the plant where you
want to conduct the pre-sizing analysis
2. Determine the system specifications
Let us see an example for our first system
type…..Grid Connected.
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1. Selecting the location
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select horizon profile
What is it??...and why do we need it?
• Our solar panels will show us output only when the sun
rays are incident on them.
• In effect, they are active only when they can ‘see’ the
sun.
• So the horizon profile defines the amount of time for
which the sun is seen by the panels from their location.
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• On the X-axis is the Azimuth of the sun.
• On the y axis is the angle corresponding to the height of
the sun.
• The lines starting and ending on the x-axis are particular
days.
• The other curved lines are the particular hours of the
day.
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2. Determine the system specifications
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System Specs for Grid Connected
• The System can be defined using the Active Area, Nominal Power or Annual Yield
• ‘plus! ’: Shading Options
• Yearly Meteorological Yield : Optimization for the
tilt. View the purple marker after clicking
Optimization.
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Not Optimized at 45 degrees as the purple
marker is not at the highest point
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Optimized Angle is around 21 degrees.
Also observe that the losses are at 0%.
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• The Transposition Factor (TF) is important index in particular for
tracking PV systems. It represents the ratio between the in-plane
irradiation and the horizontal irradiation.
• Loss by respect to optimum is the loss occurring when the panelsposition is not optimized
It is not the overall loss, it’s just the loss with respect to power
generated at optimum orientation
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3. Results
• Observe: After all the parameters are set,
That is, Location : GreenSystem : Green
Results Option Available
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Results
The Results Window shows1. Irradiation Plot: Monthly comparison of sun
rays incident on the horizontal and incident
on our panel
2. System Output Plot: Monthly output from our
system
3. Results Table: Above information intabulated form
4. Costs: Breakdown of the total investment
and yearly cost.
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Results window for the Irradiation Plot
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Results Window for the System Output
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Results Window for the Table
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Results window for the Costs
Note: Make sure to edit the costs according to the Indian Market.
The ‘Cost Sheet’ will be provided to you.
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Summary of preliminary design
What have we achieved?
• A superficial output analysis of our intended
project without real components
• Cost analysis of the project with specific costs .
• Tentative or approximate values of our parameters in order to achieve optimization of
the output power
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In the class
Preliminary Design for Stand Alone!
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After Preliminary Analysis, we are ready to
design our main Project .
Project Design can be done for all three
system types.( Grid Connected, Stand
Alone and Pumping)
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Following are the steps we need to follow
during Project Design:
1. Project Definition Common to the system
2. Orientation analysis options of
3. Horizon Grid Connected,
4. Near Shadings Stand Alone and Pumping.5. System
6. Simulation
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Let us Design a Project for a Stand AloneSystem
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Here we will come across
i. Project Definition: Name of the Project
ii. Situation and Meteo: The location andMeteorological(Weather) Data for the chosen location
iii. Albedo: Apart from sun rays that are directly incident
on the panel, rays reflected from the surroundings of the panels are also incident on them. Albedo is the
fraction of light reflected by the surroundings that may
be incident on the solar panels
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Various panel orientation options apart
from the usual Tilt and Azimuth
These options can decide the type of
tracking, if any
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We can Optimize the performance by :
• Adjusting the system to get a maximum
yearly yield
• Or using one of the tracking options which
maximizes the incident solar radiation.
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• In this window we will be able to view a Horizon Line
Drawing.
• Tells us at what time we start seeing the sun on a
particular day.
• The smallest line is 22nd Dec.
• The Red line can be used to define a custom Horizon.
For more queries, we may refer to the manual.
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Default Horizon
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Custom Horizon
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• This parameter enables us to define the amount
and type of shading
• Option for Construction/Perspective : Designpanel formations and obstacles
• Various other tools in this option are shown insnapshots
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Select a PV Configuration
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Select a Shading Object
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Example of a constructed shading object
Panel
Shading object
Sun
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Select the Battery configuration and Model According to the needs
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• LOL: Loss of Load
Probability that the users needs cannot be
fulfilled.
• Requested Autonomy :
Amount of time for which the battery will berequired to run alone when it is in full
charged state.
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Select the PV module and its Configuration
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Keep checking this region for errors or instructions regarding our system
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Click here to proceed to the regulator selection
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I th Cl A i
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In the Class…Again
Create a Project for a Grid Connected
System.
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• Data regarding all the parameters is processed
• Various graphs and tables as a result of the
simulation
• Can choose from a wide list of variables for both
the axes, in order to get the data in our preferred
form
• We can also obtain a formal report of the system
in pdf format
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Hourly Data Storage
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Hourly Data Storage
Special Graphs
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Special Graphs
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Simulation in process
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Simulation in process
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After the simulation is complete, we can
obtain a number of graphs at the output of
which few are shown.
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We can also analyze the output in a
tabulated form if required..
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Use PVSYST manual.