Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 29 for “"Secondary Control"”.
-
Modeling, simulation, and control design of electro-mechanical dynamics in heterogeneous power systems
… generators and grid forming inverters with droop control, virtual synchronous machine control, and dispatchable virtual oscillator control is developed. To mitigate model complexity and facilitate analytical understanding, this framework employs reduced-order models that are applicable for …
-
Power Management and Control Strategies in Hybrid AC/DC Microgrids
… and implement improved power management and control strategy to improve the performance of the hybrid microgrid. The first study proposes an improved power management and control coordination strategy for an autonomous HMG. The HMG considered in this part consists of multiple AC and DC …
-
Socialization of coping with peer victimization and negative emotionality: Interactive contributions to children's responses to stress and depressive symptoms
… depressive symptoms over time; specifically, secondary control engagement suggestions predicted fewer symptoms for all children, and disengagement coping suggestions predicted fewer symptoms for children with both high negative emotionality and high exposure to peer victimization. Active …
-
Organic phosphorus in marine sediments : chemical structure, diagenetic alteration, and mechanisms of preservation
… Porg. No evidence for direct structural control on remineralization of Porg was found. Instead, sorptive protection appears to be an important mechanism for Porg preservation, and structure may act as a secondary control due to preferential sorption of specific Porg compound classes.
-
Contributions of maternal emotional awareness to socialization of coping
… emotional awareness predicted more primary control engagement suggestions (suggestions to address the source of stress or the accompanying emotional response) concurrently and over time, and predicted more distress responses concurrently. Emotional awareness predicted fewer secondary control …
-
Organic phosphorus in marine sediments : chemical structure, diagenetic alteration, and mechanisms of preservation
… Prog. No evidence for direct structural control on remineralization of Porg was found. Instead, sorptive protection appears to be an important mechanism for Prog preservation, and structure may act as a secondary control due to preferential sorption of specific Porg compound classes.
-
The edge effect: lateral habitat ecology of an alluvial river flood plain
… flood pulse disturbance was the major force controlling periphyton community biomass, nutrient status, and species composition, with secondary control by surface and groundwater mediated water chemistry fluctuations during lower flow periods. We end with a study relating biodiversity pattern …
-
The edge effect: lateral habitat ecology of an alluvial river flood plain
… flood pulse disturbance was the major force controlling periphyton community biomass, nutrient status, and species composition, with secondary control by surface and groundwater mediated water chemistry fluctuations during lower flow periods. We end with a study relating biodiversity pattern …
-
L' inventaire des réponses volontaires à la discrimination sexiste: l'engagement et le désengagement à l'endroit de la discrimination sexiste et les retombées sur la santé mentale
… towards me), engagement with primary control (PC) (e.g. I tried to educate the perpetrator by providing a different point of view) and engagement with secondary control (SC) (e.g. I reminded myself that work/school is not everything). The aim of Study 2 was to investigate the …
-
Dynamic energy management system of microgrid
Controlling the power dispatch and meeting the load demand in a power system made up of distributed energy sources (DERs) needs a power management/dispatch system at secondary control level, whether the microgrid (MG) is connected to the grid or operates in isolation. Power is either drawn from or …
-
Design of DC-DC converters using Tunable Piezoelectric Transformers
… transformers (TPT) which provide an extra control terminal, used in this case, to regulate the output voltage. A detailed mathematical analysis is done on the electrical equivalent circuit of the TPT to understand the effect of control terminal loading on the circuit performance. Based on …
-
Analytical investigation of active control of radiated inlet noise from turbofan engines
… developed to study the potential of active noise control techniques for reducing radiated tonal inlet noise from turbofan engines. The analytical model consists of multiple control sources placed in the periphery of the engine inlet duct which inject anti-noise into the duct to destructively …
-
Perceptions of cause and control in people with Parkinson's disease
… namely perceptions of cause and perceptions of control. The first section presents a narrative synthesis of the quantitative research on the demographic, clinical and psychological correlates of control in PD and two other chronic motor illnesses; multiple sclerosis (MS) and motor neurone …
-
An interpretive phenomenological analysis of religious coping and relationship with god among older adults with functional impairments
… style. In addition, we sought to understand how control and acceptance were experienced in this context. Second, this study aimed to explore participants' understanding of a standard measure of religious coping. Third, this study aimed to explore potential areas of divergence in the nature of …
-
Measuring Therapist Adherence to a Manual-Based Treatment Tested in a Community Setting: The PASCET Manual Adherence Scale (P-MAS)
… of the treatment manual for the "Primary and Secondary Control Enhancement Training" program (PASCET; Weisz et al., 1999). In sum, the P-MAS showed strong interrater reliability for most items of the scale. The items with poorer ICCs may have been influenced by instrumentation problems, small …
-
Active Minimization of Acoustic Energy Density in a Mock Tractor Cab
<p>An active noise control (ANC) system has been applied to the problem of attenuating low-frequency tonal noise inside small enclosures. The intended target application of the system was the reduction of the engine firing frequency inside heavy equipment cabins. The ANC system was based on a …
-
Demonstrating Long-Term Primary Care Need For Medically Vulnerable Populations Post-Disaster
… care services after initial surge (i.e., "secondary surges") that overwhelm the local health system. There is a current gap in the literature examining a disaster's impact on long-term health care access for medically vulnerable populations. The goal of this quasi-experimental study was to …
-
Control of DC Power Distribution Systems and Low-Voltage Grid-Interface Converter Design
… the application of dc systems: (a) system-level control to improve load sharing, voltage regulation and efficiency; (b) design of a high-efficiency interface converter to connect dc microgrids with the existing low-voltage ac distributions, with a special focus on common-mode (CM) voltage …
-
Distributed energy resource integration: design, integration and control
… discusses in depth the design, integration and control of the most advanced microgrid in North America. The thesis provides a comprehensive review of the engineering studies, analysis and considerations that are key to designing utility-scale microgrids. Furthermore, the thesis dives deep into …
-
Power System Frequency Control and Stability Analysis With Increasing Renewable Energy Penetration Level
… significant. In this dissertation, the inertial control algorithms are investigated and analyzed for power electronics converter in a renewable energy generation unit. The concept and design of Virtual Synchronous Generator are comprehensively discussed, such that the small-signal stability and …
Page 1 of 2