A5031160717- Photovoltaic System Optimization Techniques
- Electrical Fault Detection and Protection
- Solar Radiation and Photovoltaics
- Photovoltaic Systems and Sustainability
- Advanced Battery Technologies Research
- Electrostatic Discharge in Electronics
- Risk and Safety Analysis
- solar cell performance optimization
- Integrated Circuits and Semiconductor Failure Analysis
- Non-Destructive Testing Techniques
- Magnetic confinement fusion research
- Hybrid Renewable Energy Systems
- Induction Heating and Inverter Technology
- Thin-Film Transistor Technologies
- Silicon and Solar Cell Technologies
- Advanced battery technologies research
- Solar Thermal and Photovoltaic Systems
- Geophysical Methods and Applications
- Particle Accelerators and Free-Electron Lasers
- Power Systems and Renewable Energy
- CCD and CMOS Imaging Sensors
- Ultrasonics and Acoustic Wave Propagation
- Real-time simulation and control systems
- Combustion and Detonation Processes
- Occupational Health and Safety Research
National Renewable Energy Laboratory
2006-2024
Beijing Solar Energy Research Institute
2023
UL Research Institutes
2023
Intertek (United States)
2023
University of North Carolina at Charlotte
2023
Teachers Development Group
2022
Concordia University
2022
Eskom (South Africa)
2022
National Tsing Hua University
2022
DuPont (United States)
2022
Abstract The cost of photovoltaic (PV) modules has declined by 85% since 2010. To achieve this reduction, manufacturers altered module designs and bill materials; changes that could affect durability reliability. determine if these have affected durability, we measured the performance degradation 834 fielded PV representing 13 types from 7 in 3 climates over 5 years. Degradation rates ( Rd ) are highly nonlinear time, seasonal variations present some types. Mean median rate values...
Incident energies in photovoltaic (PV) systems are modeled using a variety of methods. These methods referenced NFPA 70E and other publications. Direct-current (dc) systems, such as PV may not follow the conventional model used present standards. Using experimental data, we will correlate refine incident-energy calculations for systems. This article proposes methodology validating latest dc A forthcoming more test results after improve setup procedures. only discuss arcs cover types (e.g.,...
Abstract This paper investigates the feasibility of using fixed resistors instead active maximum power tracking as electrical loads for long‐term exposure testing photovoltaic modules and arrays. The method investigation was to compare resistive versus loading on two which historic current‐voltage data over time were available. Also, a small amorphous silicon array installed with load performance has been monitored time. major conclusion this work is that an inexpensive viable means devices...
Solar photovoltaic (PV) systems are common and growing, with 42.4 GW of installed capacity currently in the United States nearly 15 added 2016. This paper will help electrical workers firefighters understand some basic operating principles hazards PV DC arrays. We briefly discuss effects solar radiation temperature on power output; module testing standards; methods for calculating number modules a string; National Electrical Code guidelines that aimed toward improving array safety;...
When photovoltaic (PV) modules are installed on rooftops, the module temperature depends primarily geographic location and mounting configuration. If structure does not provide sufficient airflow in a hot environment, 98th percentile will exceed 70°C, which according to IEC TS 63126, requires higher levels of thermal stability testing. However, there is no clear way determine level needed for particular system design. In this work, we identify relationship between standoff rooftop propose...
Small DC-coupled battery test systems are deployed at the National Renewable Energy Laboratory to evaluate capacity fade models and report on performance parameters such as round-trip efficiency under indoor outdoor deployment scenarios. Initial commercial products include LG Chem RESU lithium-ion (Li-ion) Avalon vanadium redox flow batteries. Adapting lab-scale methods has challenges, including maintaining constant temperature fully controlling batteries through standard discharge curves....
Renewable energy systems continue to be one of the fastest growing segments industry. This paper focuses on understanding how photovoltaic (PV) technology behaves under dc arc conditions. Emphasis is placed electrical safety aspect DC flash incident evaluation. Because fast proliferation PV and lack formal equivalent calculation guidelines such as IEEE 1584 for AC systems, it has been necessary rely different equations models presented by various researchers over last few years. discusses...
When photovoltaic modules are installed on rooftops, the temperature depends geographic location and mounting configuration. If structure does not provide sufficient airflow in a hot environment, 98th percentile will exceed 70°C, which according to IEC TS 63126, requires higher levels of thermal stability testing. However, there is no clear way determine level needed for particular system design. In this work, we identify relationship between module standoff rooftop temperature, propose...
Solar Photovoltaic (PV) systems are common and continue to gain popularity. This article helps electrical workers firefighters understand basic operating principles hazards of PV dc arrays.
Renewable energy systems continue to be one of the fastest growing segments industry. This article focuses on understanding how photovoltaic (PV) technology behaves under dc arc conditions. Emphasis is placed electrical safety aspect arc-flash incident (IE) evaluation. Because fast proliferation PV and lack formal equivalent calculation guidelines, such as IEEE 1584 for ac systems, it has been necessary rely different equations models presented by various researchers over last few years.