SEARCH · Engineering Papers
Results for “PV SYSTEM”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Optimization and assessment of floating and floating-tracking PV systems integrated in on- and off-grid hybrid energy systems
Not Available
Multi-Mode Operation and Control of a Z-Source Virtual Synchronous Generator in PV Systems
Not Available
Exploring the Grid Electricity Saving Potentials of Using Hybrid PV Systems in European Countries: A Comparative Study
Not Available
Performance and Aging of a 20-Year-Old Silicon PV System
Explore the source record for details and available documents.
Real-Time Series Resistance Monitoring in PV Systems Without the Need for I-V Curves
We apply the physical principles of a familiar method, suns-V oc , to a new application: the real-time detection of series resistance changes in modules and systems operating outside. The real-time series resistance (RTSR) method that we describe avoids the need for collecting I-V curves or constructing full series resistance-free I-V curves. RTSR is most readily deployable at the module level on microinverters or module-integrated electronics, but it can also be extended to full strings. We found that automated detection of series resistance increases can provide early warnings of some of the most common reliability issues, which also pose fire risks, including broken ribbons, broken solder bonds, and contact problems in the junction or combiner box. We also describe the method in detail and describe a sample application to data collected from modules operating in the field.
Ability of Short Term Performance Tests to Reproduce the Results of a One-Year Adjusted Energy Test for Non-Concentrating PV Systems
Abstract not provided
Real-Time Series Resistance Monitoring in PV Systems Without the Need for IV Curves
We apply the physical principles of a familiar method, suns-Voc, to a new application: the real-time detection of series resistance changes in modules and systems operating outside. The real-time series resistance (RTSR) method that we describe avoids the need for collecting IV curves or constructing full series-resistance-free IV curves. RTSR is most readily deployable at the module level on micro-inverters or module-integrated electronics, but it can also be extended to full strings. Automated detection of series resistance increases can provide early warnings of some of the most common reliability issues, which also pose fire risks, including broken ribbons, broken solder bonds, and contact problems in the junction or combiner box. We describe the method in detail and describe a sample application to data collected from modules operating in the field.
Updated evaluation of shock hazards to firefighters working in proximity of PV systems
Abstract not provided.
Performance of Power-Limited Differential Power Processing Architectures in Mismatched PV Systems
Explore the source record for details and available documents.
Facilitating Deployment of Community Solar PV systems on Rooftops and Vacant Land in Northeast IL - Final Report
The Cook County Community Solar project set out to unlock the potential of community solar in the Chicago region with lessons that could be applied nationally. One of the first steps was to prove out the potential market. This was done through an opportunity assessment which showed there is over 9,000 megawatts worth of site capacity available for community solar projects in Cook County – nearly enough to offset all of Cook County’s residential electricity use. The assessment also showed that almost 75% of Cook County households are not able to invest directly in solar photovoltaic systems due to a variety of issues from physical barriers such as shading, or condition of the roof, to financial barriers such as lack of roof ownership, or the up-front costs of installation. Because of these barriers, community solar is an essential part of making the benefits of renewable energy available to all of the residents of Cook County. In addition to the opportunity assessment the project team also worked with the over 200 individuals who participated in the stakeholder advisory group to develop a number of other products including: 1) an Economic & Policy Barriers Resolutions and Work Plan document which laid out best practices to address the policy barriers that existed at the time (May of 2016) 2) Value Proposition Report I and Report II which summarize the value of community solar to potential developers and subscribers, 3) The Community Solar Business Case Tool, which provides a flexible financial model that projects the costs and befits to the system developer and subscriber for a project, 4) Bill Crediting Analysis and the 5) Final Report. The Final Report contains 15 case studies which prove that community solar projects are economically feasible in Cook County with a variety of sites, solar designs, ownership and subscriber models.
Photovoltaics Optimized for Stationary Wide-Angle Concentrator PV System (Final Report)
Under this CRADA, NREL will cooperate with Glint on highly-efficient photovoltaic cells optimized for integration into Glint's concentrator panels. These cells will be based on NREL's unique expertise in four-junction cell design and fabrication, and will be optimized to match the spectral, temperature, and geometric requirements of the Glint panels.
Optimizing Bifacial PV Systems (Q3 FY2020 Project Report)
This project has four main technical objectives. Develop and improve bifacial performance models by adding the capability to evaluate electrical behavior and performance of bifacial modules and arrays under realistic field conditions including irradiance variability caused by racking, module frame, and position in the array. Instrument and monitor performance of fielded bifacial systems to validate performance models and to measure, analyze and publish on bifacial energy gain. These should include both research and commercial bifacial systems and cover a variety of deployment applications. Evaluate optimal bifacial system designs using simulations leveraging high performance computing, and also using full sized and miniaturized experimental field deployments. Establish and contribute to international test standards for bifacial system performance, testing, and safety, and work with the community to establish installation and siting best practices.