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 213 for “"system stability"”.
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Identification of Power System Stability Using Relevant Modes
… and sources of reactive power by studying power system stability in the vicinity of system equilibrium states. The locations for reactive power sources are determined by identifying those modes of the system that participate most in the system behavior in general and in dictating the final state …
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Wind farm model for power system stability analysis
… not exhibit major oscillatory behavior when the system is perturbed. Moreover, WTG's variables do not participate in unstable modes and they do not change the system stability structure. In general, the most important interaction between WTGs and the system is the interchange of power. An …
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Probabilistic analysis of compression system stability using importance sampling
The probability of instability is computed via a new approach based on Importance Sampling and a dynamic compression system model. In contrast to ordinary Monte Carlo methods Importance Sampling offers reduced confidence intervals, reduced number of samples and reduced model execution times. The …
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Nonlinear Control System Stability Metrics via A Singular Perturbation Approach
… Generalized Gain Margin (GGM) are proposed as stability metrics for Linear Time-Invariant (LTI) systems, Linear Time-Varying (LTV) systems, Nonlinear Time-Invariant (NLTI) systems and Nonlinear Time-Varying (NLTV) systems, which are: (i) theoretically based, (ii) practically measurable, (iii) …
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On the application of PMU measurements to system stability analysis
This thesis proposes a method to analyze power system stability by utilizing PMU measurements. As the current power system is operated close to its limits, stability is of high concern for both operators and customers. The implementation of phasor measurement units across the power system allows …
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Feedback linearizing generator excitation control for enhanced power system stability
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.
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Superconducting magnetic energy storage for power system stability and quality enhancement
The stability of power systems has become the most critical issue affecting their quality and performance. Concerns over climate change are now moving the energy sector into a new era of modern power grids. To sustain the reliable operation of power systems and improve the quality of power …
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Application of PMU for system stability analysis with Thevenin equivalent modeling
… of the proposed method to analyze power system stability by utilizing phasor measurement units (PMUs). In the past decades, industrialization has expanded rapidly around the world, and the demand for stable and reliable power sources has increased. Therefore, maintaining stable operation …
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Composite system stability methods applied to advanced shipboard electric power systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1992.
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Power system stability evaluation using the miniaturized A-C network analyzer
… of the most important problems involved in power system operations is stability evaluations to determine whether or not a system will remain in synchronism during transient disturbances. The mathematical expressions from which stability is determined are relatively simple in themselves; however, …
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Impacts of superconducting magnetic energy storage unit on power system stability
… magnetic energy storage (SMES) unit on the power system first-swing stability by the impedance model of the SMES unit and EMTP simulations. The impedance model of the SMES unit is established in this thesis for study purpose. It has been concluded that SMES unit can greatly improve the power …
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Impact of solar photovoltaics on the system stability of the Zambia national grid
… poses significant challenges to legacy power systems due to temporal fluctuations, geographical dispersion of renewable energy resources and the presumed inadequacy of the existing power grids which are still dependent on traditional power generation technologies. In this study, the impacts of …
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Impact of solar photovoltaics on the system stability of the Zambia national grid
… poses significant challenges to legacy power systems due to temporal fluctuations, geographical dispersion of renewable energy resources and the presumed inadequacy of the existing power grids which are still dependent on traditional power generation technologies. In this study, the impacts of …
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Influence of unsteady losses and deviations on compression system stability with inlet distortion
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Real-time phasor measurements for improved monitoring and control of power system stability
… phasor measurements for voltage and transient stability monitoring and control. Taking advantage of the ability of a Phasor Measurement Unit (PMU) placed at a bus to sample at a fast rate the voltage and current phasors of that bus) various schemes for placing PMU's are considered and …
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Power Interface Design and System Stability Analysis for 400 V DC-Powered Data Centers
… the suitable technologies of power interface and system level configuration for high efficiency and reliable data centers. </p> <p>A 400 V DC-powered data center integrated with solar power and hybrid energy storage is proposed to reduce the power loss and cable cost in data centers. A cascaded …
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Power System Stability Improvement with Decommissioned Synchronous Machine Using Koopman Operator Based Model Predictive Control
… is referred to as decoupled synchronous machine system (DSMS). On top of that, the grid-side converter is capable of providing reactive power as an auxiliary voltage controller. However, in a practical setting, for power utilities, the detailed state equations of such device as well as the …
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Renewable Energy Integrated Power System Stability Assessment with Validated System Model Based on PMU Measurements
… an increasingly significant role in power system operation and stability assessment with its numerous penetration expansion. This is not only brought by its uncertain power output and inverter-based equipment structures but also its operation characteristics like Low Voltage Ride Through …
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