System Advisor Model (SAM) Introduction Slides and Demo Nate Blair NREL
NREL System Modeling T ools 2
System Advisor Model (SAM) System Advisor Model Free software that enables detailed performance and financial analysis for renewable energy systems http://sam.nrel.gov/download 3
Steps to Modeling Renewable Energy Weather Data Costs System Specs Compensation System Losses Financing Electricity Incentives Production Results lts Annual, Monthly, and Hourly Output, LCOE, NPV, Payback, Revenue, Capacity Factor 4
T echnologies Photovoltaics Detailed & PVWatts Battery Storage Wind Concentrating solar power Geothermal Biomass Solar water heating Financial Models Behind-the-meter residential commercial third-party ownership Power purchase agreements single owner equity flips sale-leaseback Simple LCOE calculator 5
What can you do with SAM? System Advisor Model • Model a variety of technologies in a consistent platform • Access high-quality performance and economic models developed by NREL, Sandia, and other partners • Calculate financial metrics such as LCOE, NPV, payback for projects in different markets • Perform parametric and uncertainty analyses • View and export modeling results in a variety of ways • Access extensive help documentation, view tutorials and webinars 6
Who uses SAM? Why? System Advisor Model • Lawm wmak aker ers and Utili liti ties es … to study how a policy would affect the economics of a typical system … to analyze different types of utility rate structures for renewables • Develo veloper ers and Engine ineer ers … to compare technologies, sites, or configurations … to estimate the Levelized Cost of Energy for a system • Researche chers … to examine how an innovative concept might be able to lower the Levelized Cost of Energy … to estimate the technical potential of a technology in a region • Student udents … to learn about renewable energy … to explore financing structures for renewable energy 7
SAM Users System Advisor Model Over 65,000 registered users in 130+ countries SAM is started ~ every 2 ½ minutes ( > 600 times per day) 90+ webinars with 113,346 views 8
How to Interact with the SAM team and get help? • Website – http://sam.nrel.gov o Support Forum – Ask your question! o General info/ online help file / contact info • YouTube Channel o https://www.youtube.com/user/SAMDemoVideos o All prior webinars and seminars • Bi-Monthly Round Table sessions o SAM team asks questions live and interactively • Email Support o SAM support can provide email support if question/bug is involved 9
Battery Model Designed primarily for behind-the-meter analysis • (residential and commercial scale systems) Lithium ion and lead acid chemistries including submodels • for cell voltage, capacity, thermal, degradation, and replacements Highly configurable manual dispatch controller • Integrated with PV system lifetime analysis to capture • economic effects of capacity degradation and costs of replacement Incentives, complex utility tariff structures, and financing • costs included in analysis. Validated with laboratory measured test data for two • systems. 10
3D shading calculator Fully integrated into SAM • Calculates linear beam shading losses and sky • diffuse view factor loss Imports 2D mapping underlays from Bing maps • Diurnal or hourly/subhourly time series shade • simulation Estimation of nonlinear losses for shaded • parallel strings Scripting to automate panel layout and • import/export geometry data 11
Detailed photovoltaic model Irradi diance Transposition using Isotropic, HDKR, or Perez Measured plane of array (POA) input Shadi ding Irregular obstruction shading from 3D scene Self-shading for regularly spaced rows External input from SunEye, Solar Pathfinder Snow cover loss model Module Simple efficiency model Single diode model (CEC database or datasheet) Extended single diode model (for IEC-61853 tests) Sandia PV Array Performance Model Inverter Sandia/CEC grid-tied inverter model Datasheet part-load efficiency curve System Sizing wizard or electrical layout Multiple subarrays Fixed, 1 axis, backtracking, azimuth axis, 2 axis Battery storage Degrada dation on Extrapolated single year Lifetime simulation of all years Simul mulation on 1 minute to 1 hour time steps 12
New complex utility rate model options Additional net metering options have been added and implemented to help users understand the impact of different scenarios currently implemented in several states. New data browser categorizes and consolidates results. Linkage with OpenEI rate database improved and expanded for some international rates. http://www.openei.org 13
Several ways to enter building load data • Load profile in a file that can be scaled for monthly values. • Use data about the building to create load data with consistent weather data 14
Extending SAM Desktop Application • Advanced Analysis Features • Parametric o Stochastic (and for O&M) o P50/P90 o Built-in Scripting Language • Macros • SAM project file Code Written with SAM scripting language o Software Development Kit (SDK) • inputs outputs C/C++, Python, C#, Java o Matlab, VBA SAM Simulation Core (SSC) o PHP o SDK PV CSP SWH Financials iOS And Android (NEW!!!) o C/C++ Python MATLAB .NET Java Web Services API (PVWatts Only) • External applications Open-sourced SAM code (NEW!!!) • 15
SAM Demonstration (Additional Detail Slides Follow)
What kinds of things can you do with SAM open-source? Transparency • Look at the underlying code of a model that you are interested in. Flexibility • Change the way a model works for research purposes • Change electricity rate models to be specific to your country Collaboration • Add new technology models • Add a new battery dispatch model We’d love to learn how you use SAM’s open -source code! It helps us tailor our efforts and get funding to develop the tool. 17
SAM Code Architecture Graphical User Interface. SAM Core SAM Technology model libraries. code SSC Contains SAM SDK. Custom widgets for SAM, WEX NREL libraries contains DView project LK Scripting support wxWidgets 3.1.0, GUI framework wxWidgets Development dependencies Visual Studio 2013, GCC 4.8.5 C++ Compiler minimum, libc 2.17 Operating System Windows, OSX, Linux (CentOS 7, Ubuntu 16.04, Fedora 25, Mint 18.2) 18
Thank you! Questions? Janine Freeman - project lead, photovoltaic and wind models Nick DiOrio - code architecture, battery storage models Nate Blair - emeritus lead, financials, costs, systems Steve Janzou - programming, utility rate structures (subcontractor) Paul Gilman - user support and documentation (subcontractor) Ty Neises - concentrating solar power models Mike Wagner - concentrating solar power models http://sam.nrel.gov
Lifetime Analysis In this mode, PV system degradation is (correctly) applied to the DC output of the PV modules, and so can be used to assess inverter clipping levels as the system effective sizing ratio changes in time. DC power AC power (30 years) When the system is new, much more DC power is generated than inverter capacity, resulting in significant clipping. As the modules degrade and produce less power, clipping is reduced in the later years of the system 24
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