2020 PV Reliability Workshop: February 26, 2020 Proceedings
These are the proceedings from the Feb. 26, 2020 Photovoltaic Reliability Workshop (PVRW) 2020 Conference.
41 EE - Solar Energy Technologies Office (EE-4S)↗
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Advanced Power Electronics Designs - Reliability and Prognostics (Keystone Project 1)
The primary deliverable for this project will be to construct a power electronics package utilizing an organic electrically insulating substrate material with a direct chip-to-chip interconnect technology and demonstrate superior thermal performance and greater reliability under thermal cycling, thermal aging, vibration, power cycling, and electrical high-potential evaluation over traditional packages.
47 OTHER INSTRUMENTATION↗
2020 PV Reliability Workshop: February 25, 2020 Proceedings
These are the proceedings from the Feb. 25, 2020 Photovoltaic Reliability Workshop (PVRW) 2020 Conference.
41 EE - Solar Energy Technologies Office (EE-4S)↗
Proceedings of the PV Reliability Workshop, February 22-26, 2021
The 2021 Photovoltaic Reliability Workshop (PVRW) continued in the longstanding PVRW tradition of engaged, passionate presentation and discussion, though in a new virtual format for 2021. The workshop was hosted over 5 days, with each day featuring two oral presentation sessions and one interactive poster session. In these proceedings, you will find links to video recordings for most of the oral presentations and poster presentations along with Q&A sessions and panel discussions. Each presentation is linked from its title in this agenda.
41 EE - Solar Energy Technologies Office (EE-4S)↗
HydrogenAR: Interactive Data-Driven Presentation of Dispenser Reliability: Preprint
When delivering presentations to a co-located audience, we typically use slides with text and 2D graphics to complement the spoken narrative. Though presentations have largely been explored on 2D media, augmented reality (AR) allows presentation designers to add data and augmentations to existing physical infrastructure on display. This could provide a more engaging experience to the audience and support comprehension. With HydrogenAR, we present a novel application that leverages the benefits of data-driven storytelling with those of AR to explain the unique challenges of hydrogen dis- penser reliability. Utilizing physical props, situated data, and virtual augmentations and animations, HydrogenAR serves as a unique presentation tool, particularly critical for stakeholders, tour groups, and VIPs. HydrogenAR is a product of multiple collaborative de- sign iterations with a local Hydrogen Fuel research team and is evaluated through interviews with team members and a user study with end-users to evaluate the usability and quality of the interactive AR experience. Through this work, we provide design considera- tions for AR data-driven presentations and discuss how AR could be used for innovative content delivery beyond traditional slide-based presentations.
augmented reality↗
Reliability Aspects of Power-Dense Electric-Drive Power Electronics
This presentation provides a state of the art of electric-drive vehicle power electronics, and covers the APEEM Group research in thermomechanical and reliability aspects of advanced power electronics packaging. Some future directions are identified.
ADVANCED PROPULSION SYSTEMS↗
Advanced Power Electronics Designs - Reliability and Prognostics (Keystone Project 1)
The primary deliverable for this project will be to construct a power electronics package utilizing an organic electrically insulating substrate material with a direct chip-to-chip interconnect technology and demonstrate superior thermal performance and greater reliability under thermal cycling, thermal aging, vibration, power cycling, and electrical high-potential evaluation over traditional packages.
ADVANCED PROPULSION SYSTEMS↗
Power Electronics Materials and Bonded Interfaces - Reliability and Lifetime
Wide-bandgap devices have pushed the operational limit of semiconductor devices in automotive power electronics packages to higher temperatures (>200 C). While a higher efficiency can be achieved through the use of wide-bandgap devices, the entire package must be re-designed with components that can withstand the higher temperature limits. Sintered silver and transient liquid phase bonds are potential candidates as bonded materials for use in higher temperatures however, the underlying mechanics of deformation under thermal loads and the resulting failure mechanisms in these materials are not well understood. Accelerated experiments conducted at NREL reveal that high-lead solder joints have better reliability than sintered silver under extreme thermal cycling conditions. Furthermore, efforts to develop a crack propagation model for the high-temperature materials are described.
ADVANCED PROPULSION SYSTEMS↗
Proceedings of the PV Reliability Workshop, February 21-25, 2022
The 2022 PV Reliability Workshop (PVRW) was held virtually from February 21-25, 2022. These proceedings collect the oral and poster presentation recordings from the workshop.
photovoltaics↗
Renewables, Resource Adequacy, and Reliability
Presentation to the Legislative Energy Horizons Institute on grid reliability and renewable integration, including resource adequacy, flexibility, and distributed energy resource considerations.
ENERGY PLANNING, POLICY, AND ECONOMY,POWER TRANSMI↗
Advanced Power Electronics Designs - Reliability and Prognostics (Keystone Project 1)
The primary deliverable for this project will be to construct a power electronics package utilizing an organic electrically insulating substrate material with a direct chip-to-chip interconnect technology and demonstrate superior thermal performance and greater reliability under thermal cycling, thermal aging, vibration, power cycling, and electrical high-potential evaluation over traditional packages.
ADVANCED PROPULSION SYSTEMS,ENGINEERING↗
INL’s Human Reliability Analysis Data Collection Based on the SHEEP Framework
This presentation introduces INL's human reliability analysis data collection studies.
99 GENERAL AND MISCELLANEOUS↗
INVESTIGATION OF HUMAN RELIABILITY ANALYSIS METHODS FOR ANALYZING PRE-INITIATORS
As a type of human actions defined in human reliability analysis (HRA), pre-initiator refers to the human actions that may lead to the unavailability of systems, typically committed during maintenance, test, or calibration. This paper investigates representative HRA methods used for analyzing pre-initiators. The HRA methods are Technique for Human Error Rate Prediction (THERP), Korean Standard HRA (K-HRA) and Standard Plant Risk HRA (SPAR-H). In this paper, characteristics of each HRA method are compared for qualitative and quantification aspects. Two pre-initiators, i.e., a calibration task and a valve restoration task, are analyzed using the HRA methods to compare human error probabilities. Then, insights from the analysis and additional research requirements are discussed in this paper.
99 GENERAL AND MISCELLANEOUS↗
INVESTIGATION OF HUMAN RELIABILITY ANALYSIS METHODS FOR ANALYZING PRE-INITIATORS
As a type of human actions defined in human reliability analysis (HRA), pre-initiator refers to the human actions that may lead to the unavailability of systems, typically committed during maintenance, test, or calibration. This paper investigates representative HRA methods used for analyzing pre-initiators. The HRA methods are Technique for Human Error Rate Prediction (THERP), Korean Standard HRA (K-HRA) and Standard Plant Risk HRA (SPAR-H). In this paper, characteristics of each HRA method are compared for qualitative and quantification aspects. Two pre-initiators, i.e., a calibration task and a valve restoration task, are analyzed using the HRA methods to compare human error probabilities. Then, insights from the analysis and additional research requirements are discussed in this paper.
99 GENERAL AND MISCELLANEOUS↗
Component Reliability
An overview of the National Renewable Energy Laboratories Component Reliability Project including the accomplishments for the previous year.
component reliability↗
A Framework to Integrate Human Reliability Data Obtained from Different Sources Based on the Complexity Scores of Proceduralized Tasks
For many decades, PSA (Probabilistic Safety Assessment) or PRA (Probabilistic Risk Assessment) techniques have been used to enhance the operational safety of nuclear power plants (NPPs) based on the consideration of potential hazards that could result in an unexpected consequence. As human error is one of the potential hazards, diverse human reliability analysis (HRA) methods have been proposed to provide a systematic way to estimate the likelihood of human errors (i.e., human error probability, HEP) in specific task contexts. Accordingly, it is evident that the quality of HRA results strongly depends on the credibility of HEP estimations. This implies that, in terms of enhancing this credibility, the collection of raw information (HRA data) that is helpful for understating when and why human errors occur is a crucial issue. In order to address this issue, in this study, the feasibility of a framework to integrate HRA data obtained from different sources is investigated based on the complexity of proceduralized tasks.
99 GENERAL AND MISCELLANEOUS↗
Power Electronics Materials and Bonded Interfaces - Reliability and Lifetime
High temperature operation of wide bandgap devices continue to be a challenge for the power electronics packages. Thermal performance and reliability are important factors that determine the viability of a bonded interface for operation at high temperatures. In this presentation, we present the technical approach and key results from the research on sintered silver, transient liquid phase alloy, and polymeric materials. A lifetime prediction model that incorporates the thermomechanical behavior of sintered silver at 200C was developed. The copper-aluminum transient alloy completed 350 thermal cycles from -40C to 200C and little increase in the defect level was observed. In addition to material research, we initiated a time-series analysis on the scanning acoustic microscope images of eutectic solder to explore statistical forecasting methods and machine learning techniques. Initial results that report the accuracy of a few different statistical models are presented.
ADVANCED PROPULSION SYSTEMS↗
Advanced Human-System Interface Risk Analysis Based on Redundancy-guided Systems-theoretic Hazard Analysis and Human Reliability Analysis
Human-system interfaces (HSIs) play an important role in enabling operators to communicate with the nuclear power plant (NPP) side. Getting the information required to understand a NPP’s current status or perform necessary actions for responding to a given operational context are representative operator tasks performed using HSIs. To date, HSIs have been mainly evaluated in the context of human reliability analysis (HRA). However, the current HSI evaluation that occurs during HRA may be challengeable on two fronts: (1) reflecting the unique characteristics of HSI systems and (2) considering situations in which HSIs are poorly operated due to software/hardware malfunctions. Accordingly, this study proposes an approach for specifically evaluating HSIs for digital instrumentation and controls (DI&C) systems, using Redundancy-guided Systems-theoretic Hazard Analysis (RESHA) and HRA. RESHA is a method for analyzing DI&C systems with redundancy features. In this study, we investigate how HSIs are evaluated in existing HRA methods, and what challenges exist in the current approaches. To better evaluate HSIs for DI&C systems, this study modifies the existing HSI evaluation process by additionally modeling the HSI back- and front- ends. In this paper, a HSI fault tree for the APR1400 DI&C system is introduced through a piping and instrumentation diagram. It then touches upon what aspects of the suggested method must be further researched.
99 GENERAL AND MISCELLANEOUS↗