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 27 for “"Multi-machine"”.
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On-Line Transient Stability Analysis of a Multi-Machine Power System Using the Energy Approach
… the PMUs and the Transient Energy Function of a multimachine system. Thanks to the PMUs, the weakness of the direct methods, which is the over-simplification of the generator model, is overcome. This new method consists of fitting a curve to the data of the post-fault path provided by PMUs and …
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The Modeling and Control of a Wind Farm and Grid Interconnection in a multi-machine system
… of WECS (Wind Energy Conversion System) in a multi-machine system. As one of the fastest growing renewable energy resources, the trend of wind energy changes to variable speed wind turbines. The concept of the variable speed is based on the variable speed according to the instantaneous wind …
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Dynamic Analysis and Control of Multi-machine Power System with Microgrids: A Koopman Mode Analysis Approach
… the small-signal stability of the two-area four-machine system with four parallel microgrids connected to the distribution feeders though different impedances. We show that the conventional PQ control of the inverters is insufficient to stabilize the voltage at the point-of-common coupling when …
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Modeling, control and stability analysis of VSC-HVDC links embedded in a weak multi-machine AC system.
… 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 identify the most suitable …
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Decentralized Synergetic Control of Power Systems
… has been previously applied to a Single Infinite Machine Bus (SMIB) system with high degree of success, it has not been employed to systems with multi machine. Also, the method has good robust characteristic like that of the popular Sliding Mode Control (SMC) technique. But the latter technique …
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An Analysis of the Two-Machine Static, Stochastic Flowshop With Linear Completion Time Costs
This study investigated the n-job, two-machine, static flowshop with independent, exponential job processing times and linear completion time or penalty costs. The objective was to find a job sequence which minimizes the expected total penalty cost for all the jobs. This performance measure is more …
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MPI-based scalable computing platform for parallel numerical application
… parallel framework for parallelization on multi-core/multi-machine hardware. In this thesis, a computing platform for parallel numerical applications is designed and implemented. The platform performs parallelization by multiprocessing over MPI library, and serves as a layer of abstraction …
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Radiomics of Nsclc: Quantitative Ct Image Feature Characterization and Tumor Shrinkage Prediction
… non-redundant, and informative across multiple machines. Feature sets with these qualities are needed for NSCLC radiomics models to be robust to machine variation and spurious correlation.</p> <p>To accomplish this objective, test-retest CT image pairs were obtained from 56 NSCLC …
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Methods of Analyzing the Performance of Induction Machines.
The modeling of induction machines during transient conditions, in order to analyze their effects on the generating station auxiliaries systems, poses some complications for the power system engineer. One concern is establishing realistic motor data for use in modeling large motors. The second is …
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Improving inter-area oscillations damping of power systems through cooperative active power control of distributed energy resources
… proposed solution is investigated on different multi-machine test systems with classic and detailed electromechanical dynamic models through modal analysis and time-domain simulations. The modal analysis results indicate that all the inter-area modes are damped for all test cases. Time-domain …
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A Practical Method for Power Systems Transient Stability and Security
… is extended for transient stability analysis of multi machine power systems. The proposed method calculates the potential and kinetic energies for all machines in a power system and then compares the largest group of kinetic energies to the smallest groups of potential energies. A decision based …
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Spline based controller for nonlinear systems
… to design nonlinear excitation controllers for a multi-machine power system using Direct Feedback Linearization. The designed controllers, whose parameters are obtained, require the internal variables of the machines. These variables are verified by using a proposed internal variable identifying …
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Multiple Swing Out-of-Step Relaying
… relaying theory, is the identification of multiple unstable swings after a given disturbance. In other words, an Out-of-Step protection scheme that handles a network that behaves as a multi-machine system is presented.
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Dynamical modelling of power systems with power electronic controllers using individual channel analysis and design
… of supply quality. The dynamical interaction of multi-machine networks, power electronics and large penetration of intermittent generation are highly complex phenomena and a better understanding of their dynamical behaviour is mandatory before larger increases of intermittent generation are added …
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Multi-node mirrored NVRAM in a virtualized environment
… has contributed to the design and deployment of multi-node data storage clusters. This paper presents a simulator of one such multi-node, multi-machine cluster. The simulator is architected by extending the NetApp, Inc. 2-node cluster architecture to an N-node design. Data availability is …
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Stability effects of frequency controllers and transmission line configurations on power systems with integration of wind power
… effects of the integration of wind power on multi-machine power systems. First, the small-signal stability effects of turbine governors connected to synchronous generators in the presence of large-scale penetration of wind and load power disturbances are analyzed. Results suggest that tuning …
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DECENTRALIZED CONTROLLERS FOR INTERCONNECTED POWER SYSTEMS
… damping of electromechanical oscillations in a multi-machine electrical power system. A particular real power system comprised of five generating plants and an infinite bus was investigated in these studies. A review is given of the approaches used at present to improve system damping using …
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Adaptive Simplified Neuro-Fuzzy Controller as Supplementary Stabilizer for SVC
… of the proposed controller is tested on a single machine infinite bus system, and a multi-machine system. Results of simulation studies demonstrate that the performance with the proposed ASNFC is practically the same as with ANFC, but with a smaller number of parameters to optimize that reduces …
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Harvesting machinery technologies for precision and sustainable sugarcane production
… The goal of this study was to develop harvesting machinery technologies for sustainable sugarcane production that maximize material throughput rates while minimizing losses and achieving optimum quality. Estimated yield maps were produced using the GPS location of each machine used in the …
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How to integrate your production and logistics strategy : a new CLSP formulation for a CPG supply chain
… considered simultaneously. The model solves a multi-machine capacitated lot sizing problem with novel extensions for multi-echelon inventory, transfer costs between inventory echelons, and a multi-echelon product setup hierarchy. The model includes extensions for setuptimes and multiple …
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