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Results for “multilevel”
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.
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Emergent Dark States from Superradiant Dynamics in Multilevel Atoms in a Cavity
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Suppressing the Capacitor Voltage Fluctuations in Low Frequency Operation of Modular Multilevel Converters
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A Current-fed High Gain Multilevel DC-DC Converter for BESS Grid Integration Applications.
Abstract not provided.
An Active Hybrid Modulation Strategy for a Si/SiC Hybrid Multilevel Converter
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Simulation of Modular Multilevel Converter System Via an Analytical Approach
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Spatiotemporal Modeling of Real World Backsheets Field Survey Data: Hierarchical (Multilevel) Generalized Additive Models
Assessing photovoltaic module backsheet durability is critical to increasing module lifetime. Laboratory-based accelerating testing has recently failed to predict large scale failures of widely adopted polymeric materials. Additionally, there is a growing concern on characterizing the non-uniformity of field exposure. Therefore, data from field surveys are critical to assess the performance of component lifetimes. Using a documented field survey protocol, 19 field surveys were conducted. The focus of this survey strategy is to investigate spatial continuity in degradation modes. By combining field survey data with real-time satellite weather data, stressor / response models have been trained. Generalized additive Models (GAM) model was created to predict the value of degradation based on measured predictors. Two different GAM constructions were testing using different implementations of basis splines. The model includes variables on the environmental stressors of the system and the location of each measurement in the PV mounting structure. The incorporation of hierarchical structure into the models allowed for material specific degradation rates, while maintaining the assumption of a global trend. The model performed well with an adjusted R2 of 0.975 for yellowness index prediction.
Cell Capacitor Voltage Switching-Cycle Balancing Control for Modular Multilevel Converters
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