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System Evaluation and Optimization Performing Organization: Sandia National Laboratories Key Technical Contacts: Michael Quintana (Primary Contact), 505-844-047, maquint@sandia.gov David King, 505-299-9184, dlking@sandia.gov DOE HQ Technology Manager: Dan Ton, 202-586-4618, dan.ton@hq.doe.gov FY 2004 Budget: $1,316K _____________________________________________________________________________________ Objectives • Develop, validate, and apply new testing procedures, based on energy production, that are needed to completely understand and optimize the performance of multiple components in fully integrated PV systems. This work provides the basis for system-performance modeling and testing standards needed to design and monitor PV systems based on energy production. • Collect and analyze performance, reliability, and installation information from selected systems and components in order to develop technology baselines, identify performance and reliability issues, identify techniques that extend component lifetime, identify opportunities for cost reduction, and improve system design procedures. • Identify system manufacturing methods and deployment strategies that improve system performance and reliability, reduce cost, and minimize technical and financial barriers to large- scale deployment of photovoltaic power systems. • Conduct detailed testing of commercial inverter performance as a function of all factors (e.g., power level, temperature, input voltage) influencing the annual energy production of PV systems. The resulting inverter performance model will be a significant contribution to PV Advisor and other system design models. This work also includes a coordinated effort with other organizations (e.g., FSEC, SWTDI, Endecon, CEC) to evaluate the long-term aging behavior of inverters. Accomplishments • SNL’s PV module/array performance model was thoroughly documented (SAND 2004-3535) to directly aid design and performance evaluations by Maui Solar, manufacturers, integrators, NIST, CEC, DOE-2 model, and Energy-10 modeling. • Substantial product improvements (e.g., reliability, utility interconnection, power quality) resulting from tests on 15 beta-version inverters from 9 manufacturers at Sandia’s Distributed Energy Testing Lab. • SNL, with support from the Regional Experiment Stations and partners (e.g., manufacturers, suppliers, utilities), delivered initial SDA benchmark data on PV grid-tied systems. Results are being published in Progress in Photovoltaics. • New inverter testing (including long-term performance) and modeling efforts are quantifying effects of temperature, voltage, voltage, and power level on inverter performance for SDA input. • SNL and FSEC provided the technical assistance needed by the USDA to issue the announcement in September of its intent to list accepted PV systems on the Rural Utilities Service List of Materials; USDA is the first federal agency to offer direct financing to the 1000+ rural coops that purchase PV from the list. • Extensive module performance calibration and annual energy modeling by SNL supported PowerLight’s installation of the largest (10 MW) PV system in the world.PDF Image | FY 2004 ANNUAL REPORT DOE Solar
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