Peter Gotseff
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View article: Reference Cell Performance and Modeling on a One-Axis Tracking Surface
Reference Cell Performance and Modeling on a One-Axis Tracking Surface Open
Performance of five silicon-based reference cells is examined on a single-axis tracking surface. The reference cells' output are modeled using one-minute sampled spectral irradiance and reference cell temperature measurements. The model al…
View article: PV Reference Cells for Outdoor Use: Comparison of First-Year Field Measurements
PV Reference Cells for Outdoor Use: Comparison of First-Year Field Measurements Open
Reference cells are widely used in the photovoltaic (PV) industry to measure irradiance. For field applications and outdoor use, a variety of products are on the market, and they are often perceived as low-cost alternatives to thermopile p…
View article: A Procedure to Correct the Historical Atmospheric Longwave Irradiance Data When the World Reference Is Established with Respect to the International System of Units
A Procedure to Correct the Historical Atmospheric Longwave Irradiance Data When the World Reference Is Established with Respect to the International System of Units Open
Historical atmospheric longwave irradiance data sets with traceability to the International System of Units (SI) are essential for renewable energy and atmospheric science research and applications. To date, all pyrgeometers used to measur…
View article: Solar Radiation Research Laboratory (SRRL) Final Report: Fiscal Years 2019-2021
Solar Radiation Research Laboratory (SRRL) Final Report: Fiscal Years 2019-2021 Open
The Solar Radiation Research Laboratory (SRRL) at the National Renewable Energy Laboratory (NREL) is a world-leading solar calibration and measurement facility and maintains and disseminates the World Radiation Reference (essentially the W…
View article: A Procedure to Correct the Historical Atmospheric Longwave Irradiance Data When the World Reference Is Established with Respect to the International System of Units
A Procedure to Correct the Historical Atmospheric Longwave Irradiance Data When the World Reference Is Established with Respect to the International System of Units Open
Historical atmospheric longwave irradiance data sets with traceability to the International System of Units (SI) are essential for renewable energy and atmospheric science research and applications. To date, all pyrgeometers used to measur…
View article: A Procedure to Correct the Historical Atmospheric Longwave Irradiance Data When the World Reference Is Established with Respect to the International System of Units
A Procedure to Correct the Historical Atmospheric Longwave Irradiance Data When the World Reference Is Established with Respect to the International System of Units Open
Historical and traceable atmospheric longwave irradiance data sets with traceability to the International System of units (SI) are essential for renewable energy and atmospheric science research and applications. To date, all pyrgeometers …
View article: Using Spectral Measurements to Characterize Solar Reference Cells on a Two-Axis Tracker
Using Spectral Measurements to Characterize Solar Reference Cells on a Two-Axis Tracker Open
A study is commencing on relating the spectral responsivity of reference cells in the field to changing spectral distribution during the day. Initial results indicate that measurements of the incident spectral distribution can match relati…
View article: Estimation of solar photovoltaic energy curtailment due to volt–watt control
Estimation of solar photovoltaic energy curtailment due to volt–watt control Open
The widespread deployment of autonomous inverter‐based solutions for mitigating voltage and frequency excursions caused by high‐penetration photovoltaic (PV) systems has drawn increased attention due to their potential impact on PV product…
View article: Using an Absolute Cavity Pyrgeometer to Validate the Calibration of a Secondary Standard Pyrgeometer Outdoors, Independent from the Reference Value of the Atmospheric Longwave Irradiance
Using an Absolute Cavity Pyrgeometer to Validate the Calibration of a Secondary Standard Pyrgeometer Outdoors, Independent from the Reference Value of the Atmospheric Longwave Irradiance Open
Accurate measurements of broadband outdoor longwave irradiance are important for renewable energy applications and the study of the atmosphere and climate change. A unique method of pyrgeometer calibration has been developed to improve the…
View article: NREL Pyrheliometer Comparisons: September 23-October 4, 2019 (NPC-2019)
NREL Pyrheliometer Comparisons: September 23-October 4, 2019 (NPC-2019) Open
Accurate measurements of direct normal (beam) solar irradiance from pyrheliometers are important for developing and deploying solar energy conversion systems, improving our understanding of the Earth's energy budget for climate change stud…
View article: NREL Comparison of Absolute Cavity Pyrgeometers and Pyrgeometers Traceable to the World Infrared Standard Group and the Infrared Integrating Sphere: September 23-October 4, 2019
NREL Comparison of Absolute Cavity Pyrgeometers and Pyrgeometers Traceable to the World Infrared Standard Group and the Infrared Integrating Sphere: September 23-October 4, 2019 Open
The comparison of the absolute cavity pyrgeometers (ACPs) with a precision infrared radiometer (PIR) pyrgeometer traceable to the World Infrared Standard Group (WISG) and a Kipp & Zonen (KZ) pyrgeometer traceable to WISG and the InfraRed I…
View article: Low-Cost Multiparameter Device for Solar Resource Applications
Low-Cost Multiparameter Device for Solar Resource Applications Open
The National Renewable Research Laboratory (NREL) Solar Radiation Research Laboratory (SRRL), in collaboration with Arable Labs Inc., deployed, calibrated, and characterized Arable Lab's Mark low-cost, multiparameter sensor system. Arable …
View article: Advanced Inverter Voltage Controls: Simulation and Field Pilot Findings
Advanced Inverter Voltage Controls: Simulation and Field Pilot Findings Open
This report describes work performed by the Hawaiian Electric Companies and the National Renewable Energy Laboratory (NREL) to model and simulate advanced inverter grid-support functions and to validate and expand on those simulations thro…
View article: Value Streams from Distribution Grid Support Using Utility-Scale Vanadium Redox Flow Battery: NREL-Sumitomo Electric Battery Demonstration Project
Value Streams from Distribution Grid Support Using Utility-Scale Vanadium Redox Flow Battery: NREL-Sumitomo Electric Battery Demonstration Project Open
The National Renewable Energy Laboratory (NREL) collaborated with Sumitomo Electric to provide research support in modeling and optimally dispatching a utility-scale vanadium redox flow battery (VRFB) energy storage. The objective of the p…
View article: Residential Advanced Photovoltaic Inverter Pilot Study Results for Select Distribution Secondaries in Hawai‘i
Residential Advanced Photovoltaic Inverter Pilot Study Results for Select Distribution Secondaries in Hawai‘i Open
Penetration levels of residential rooftop solar photovoltaic (PV) generation on the Hawaiian island of Oahu have increased significantly in recent years with many circuits now at the limits of their PV hosting. NREL and Hawaiian Electric h…
View article: Evaluating Radiometric Measurements Using a Fixed 45 Degrees Responsivity and Zenith Angle Dependent Responsivities (Poster)
Evaluating Radiometric Measurements Using a Fixed 45 Degrees Responsivity and Zenith Angle Dependent Responsivities (Poster) Open
This poster seeks to demonstrate the importance and application of an existing but unused approach that ultimately reduces the uncertainty of radiometric measurements. Current radiometric data is based on a single responsivity value that i…
View article: Solar Radiometric Data Quality Assessment of SIRS, SKYRAD and GNDRAD Measurements (Poster)
Solar Radiometric Data Quality Assessment of SIRS, SKYRAD and GNDRAD Measurements (Poster) Open
Solar radiation is the driving force for the earth's weather and climate. Understanding the elements of this dynamic energy balance requires accurate measurements of broadband solar irradiance. Since the mid-1990's the ARM Program has depl…
View article: Improving Surface Radiation in a Satellite-Based Physical Model (Poster)
Improving Surface Radiation in a Satellite-Based Physical Model (Poster) Open
This poster provides an overview of the solar resource assessment work needed to achieve high penetrations of concentrating solar power or photovoltaics on the grid.
View article: Simulation of Hawaiian Electric Companies Feeder Operations with Advanced Inverters and Analysis of Annual Photovoltaic Energy Curtailment
Simulation of Hawaiian Electric Companies Feeder Operations with Advanced Inverters and Analysis of Annual Photovoltaic Energy Curtailment Open
The Hawaiian Electric Companies achieved a consolidated Renewable Portfolio Standard (RPS) of approximately 26% at the end of 2016. This significant RPS performance was achieved using various renewable energy sources - biomass, geothermal,…
View article: Feeder Voltage Regulation with High-Penetration PV Using Advanced Inverters and a Distribution Management System: A Duke Energy Case Study
Feeder Voltage Regulation with High-Penetration PV Using Advanced Inverters and a Distribution Management System: A Duke Energy Case Study Open
Duke Energy, Alstom Grid, and the National Renewable Energy Laboratory teamed up to better understand the impacts of solar photovoltaics (PV) on distribution system operations. The core goal of the project is to compare the operational - s…
View article: Technologies to increase PV hosting capacity in distribution feeders
Technologies to increase PV hosting capacity in distribution feeders Open
This paper studies the distributed photovoltaic (PV) hosting capacity in distribution feeders by using the stochastic analysis approach. Multiple scenario simulations are conducted to analyze several factors that affect PV hosting capacity…