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.
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Showing 1 to 20 of 156 for “"System State"”.
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Advanced modeling and computational methods for distribution system state estimation
… the continued advancement of accurate and robust system monitoring tools. Traditional state estimation approaches rely on iterative methods to solve the weighted least squares problem because of the nonlinear relationship between the power measurements and voltage phasor state. It is known that …
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Power System State Estimation and Renewable Energy Optimization in Smart Grids
… will focus on two important topics: power system state estimation using phasor measurement units (PMUs), and optimization for renewable energy integration.</p><p>In the first topic, we consider power system state estimation using PMUs, when phase angle mismatch exists in the measurements. …
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A Case Study Of The Student Academic Support System: State University
… assisted academic advisement program for the State University System. This study of the Student Academic Support System (SASS) explored the administrator and advisor viewpoints, rather than traditional student perception assessments, in order to add to the understanding of computer assisted …
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Divergence between the human state assumption and the actual aircraft system state
… between the human operator's assumption of the system state and the actual state of the system, which is substantial enough to have consequential effects on the outcome of the situation. The purpose of this thesis is to explore the concept of divergence and develop a framework that can be used …
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Contributions to Distribution System State Estimation (DSSE) in the context of smart grids
Esta tesis propone un nuevo enfoque de DSSE para redes europeas de baja tensión (BT) de cuatro hilos que se enfrentan a retos como el débil acoplamiento entre fases y la latencia de la comunicación. Introduce una estrategia de medidas sintéticas, generadas mediante la reconfiguración de sensores …
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The causes and consequences of divergence between the air traffic controller state awareness and actual system state
… is an inconsistency between the human's system state awareness and the actual system state. This research investigated divergence potential in air traffic controllers and identified controller divergence causes and consequences. Based on this investigation, approaches to minimize …
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Function Modelling of Complex Multidisciplinary Systems. Development of a System State Flow Diagram Methodology for Function Decomposition of Complex Multidisciplinary Systems
The complexity of technical systems has increased significantly in order to address evolving customer needs and environmental concerns. From a product development process viewpoint, the pervasive nature of multi-disciplinary systems (i.e. mechanical, electrical, electronic, control, software) has …
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DECENTRALIZED CONTROL OF DISTRIBUTED PROCESSING SYSTEMS
… decentralized scheduling for distributed systems. The environment in which the controlling entities make decisions is stochastic and can be described as uncertain since each entity may have a different view of the system state. As a consequence, these entities may make inconsistent …
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Estimation of nonlinear systems using Jump Matrix Technique
An estimator for Nonlinear system estimation using Jump Matrix Technique is developed. The idea of the Jump Matrix Technique is to break up the nonlinear system into linear and nonlinear subsystems. The linear subsystem projection, during the sampling interval, is on the basis of the transition …
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Three-Phase Linear State Estimation with Phasor Measurements
… Measurement Unit (PMU) to directly measure the system state and the increasing implementation of PMUs across the electric power industry, a natural expansion of state estimation techniques would be one that employed the exclusive use of PMU data. Dominion Virginia Power and the Department of …
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A New State Transition Model for Forecasting-Aided State Estimation for the Grid of the Future
… intermittent wind power, the randomness in power system state will increase to unprecedented levels. This dissertation proposes a new state transition model for power system forecasting-aided state estimation, which aims at capturing the increasing stochastic nature in the states of the grid of …
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Characterizing transit system performance using Smart Card data
Although automated data collection systems have been in existence long enough to be the subject of extensive research, they continue to transform both the agency and customer side of public transportation. Transit system performance is defined along three dimensions: the supply of trains or buses; …
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Geometric Properties of Over-Determined Systems of Linear Partial Difference Equations
We relate linear constant coefficient systems of partial difference equations (a discretization of a system of linear partial differential equations) satisfying some collection of scalar polynomial equations to systems defined over the coordinate ring of an algebraic variety. This motivates the …
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A model-following digital control law for an EBF-STOL aircraft
… the control loop around each of the plant states while the feedforward gains multiply the states of the inputs to some desirable reference model, thus making it a prefilter to the plant. The model chosen for this research is that of a B-26 aircraft. The longitudinal equations of motion of …
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Advanced System Monitoring with Phasor Measurements
… in the field of real-time monitoring of power systems. By aligning the time stamps of voltage and current phasor measurements that are consistent with Coordinated Universal Time (UTC), a coherent picture of the power system state can be achieved through either direct measurements or simple …
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Secure Time-Aware Provenance for Distributed Systems
Operators of distributed systems often find themselves needing to answer forensic questions, to perform a variety of managerial tasks including fault detection, system debugging, accountability enforcement, and attack analysis. In this dissertation, we present Secure Time-Aware Provenance (STAP), a …
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Development of a relay ladder logic programming/debugging/simulation software package with graphical user interface
… translates Relay Ladder Logic diagrams into System State Language (SSL), a textual description of the system state for which any given physical output will be energized, and 2) A backward interpreter which translates SSL files into Relay Ladder Logic diagrams. Using these two interpreters, …
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Artificial neural networks for state estimation of electric power systems
… Neural Network (ANN) technology in power system state estimation. It addresses the following developments: the fundamentals of the state estimation based on ANN technology; the feasible ANN state estimation methods; use of voltage phasor angle measurements in ANN state estimation; and bad …
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An Integrated Quality System Approach to Control Inventory Record Error
A decision support system consists of a formalized computer decision model integrated with a structured database for the purpose of providing information for management decision making. Inherent in the decision making process within this environment is the understanding that the model, its database …
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Structural analysis and control of flexible manufacturing systems
… control. Structural analysis in discrete event systems refers to the characterization of states and regions in the system state space which are logically inconsistent with ""normal"" system operation. The structural characteristics of an FMS strongly affect its behavior and performance. The …
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