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 12 of 12 for “"Angle stability"”.
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Investigation into voltage and angle stability of a hybrid HVAC-HVDC power network
This study investigates the power stability problems of HVDC and VSC-HVDC interactions on their hybrid networks with HV AC link, with the intention of bringing out their weaknesses and strengths. The knowledge of this will assist network planners to be informed on ways of improving the efficiency …
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Power flow and rotor angle stability studies of HVAC-HVDC power system interconnections using DigSILENT
The backbone of all industrialised nations is the success of the power sector, which involves an efficient, reliable and secure means of power generation, transmission and distribution. Industrial growth and urbanisation have together endlessly stimulated electrical engineers to ensure that the …
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On the application of PMU measurements to system stability analysis
… 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 for …
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Modeling, control and stability analysis of VSC-HVDC links embedded in a weak multi-machine AC system.
… for enhancing the small-disturbance rotor-angle stability of a weak multi-machine power system with embedded VSC-HVDC links. Three types of linear current controller schemes (proportional-integral, proportional-resonant and Dead-Beat schemes) are investigated and discussed in detail to …
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Aspectos do desempenho operativo de redes elétricas com inserção de geração fotovoltaica
… generation model affects both voltage and angle stability. On the other hand, besides having a restricted impact on the stability of the studied grid, the distributed photovoltaic generators have an affect on the operational behavior under islanded and unbalanced grid conditions.
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An investigation into the capabilities of three simulation tools for small-disturbance stability analysis
… system simulation tools for small-disturbance angle stability analysis, namely PST, MatNetEig and CPAT Computers today have become fast, efficient with high memory capacities and advanced in data processing capabilities. Many power system simulation tools are available on the market and making …
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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 of the …
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Modeling and control of a robot manipulator
… of the trajectories produced. A Force Angle stability measure is used to guide the robot arm into trajectories that prevent the robotic system from tipping over. Results show that the Force Angle stable measure is more cautious, i.e., it classifies trajectories close to the instability …
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Consensus-Based Active and Reactive Power Control and Management of Microgrids
… to enhance voltage, output power, and phase angle stability. Three algorithms—Lagrange, Firefly, and Artificial Bee Colony—are studied for active and reactive power compensation with and without the VSG-STATCOM strategy at various noise levels.</p> <p>The dissertation also presents findings …
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Hierarchical Decentralized Control for Enhanced Stability of Large-Scale Power Systems
… in a unified manner of voltage and rotor angle stability in large-scale power systems subject to large (e.g., short circuits) and small (e.g., small load changes) disturbances. We study system robustness by calculating local stability margins. We derive decentralized control laws that …
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Transmission grid strength analysis and operation of inverter-based microgrids
… farms is investigated based on the voltage phase angle stability. A novel approach for evaluating the strength of low-inertia systems that only relies on phasor measurement unit (PMU) data is proposed and implemented to the Panhandle region of the ERCOT system. The proposed metric evaluates the …
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On-line Dynamic Security Assessment in Power Systems.
… will be less predictable. Consequently, today's stability and security assessment tools, which are generally dependent on extensive off-line studies, may no longer be feasible in their current development state. A core component of an efficient on-line dynamic security assessment is a fast and …