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 52 for “"synchronous generators"”.
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Protection of synchronous generators and induction generators
… Based Protection) that can protect the synchronous generators and induction generators securely and dependably when they have internal faults. Specifically, the EBP function monitors the consistency between the generator measurements and the generator dynamic model via dynamic state …
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Phasor Measurement Unit (PMU) : based system for event detection on synchronous generators
… for finding the necessary parameters of the generators and modeling them. These parameters were: the inertia of the generators, the speed regulation constant, and the time constant of the turbine-governor system. Axiomatic Design was used for developing the design protocol for Event Detection …
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Induction and permanent-magnet synchronous generators for small-scale power system applications
… presents two types of alternating current (ac) generators that are becoming popular for use in small-scale distributed generation and in autonomous (or standalone) power systems. For the induction generator (IG), two modes of operation are identified, namely operation on the power grid and …
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An electronic stimulator for the representation of synchronous generators in network analysers
The basic principles of the transient behaviour of a generator are briefly explained, and a non-linear differential equation describing the generator's performance is given. The need for a calculating aid for solving this non-linear equation is explained. An analogue of a generator is derived, and …
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Impact assessment of large-scale penetration of permanent magnet synchronous generators on power quality
… of large scale penetration of permanent magnet synchronous generator (PMSG) based wind turbines on power quality of the grid. PMSGs are attractive due to the absence of a gearbox in the drive-train, which results in lower maintenance costs and higher reliability. Moreover, the advancements in …
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Compensating for the effects of reduced synchronous inertia on frequency stability using virtual synchronous generators
… grid has traditionally been dominated by large synchronous generators which have provided frequency stability through their inertia and governor responses. As more renewable energy sources (RES), particularly wind and solar, are added to the grid, they displace synchronous generators. Many of …
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Mathematical Modelling of Grid Connected Fixed- Pitch Variable-Speed Permanent Magnet Synchronous Generators for Wind Turbines
… mathematical model of a 10kW permanent magnet synchronous generator (PMSG), which is designed for a fixed-pitch variable-speed wind turbine, and its corresponding simulation model for the control of the PMSG for grid connection using MATLAB/Simulink. The model includes sub-modules, such as a …
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AI-based hybrid optimisation of multi-megawatt scale permanent magnet synchronous generators for offshore wind energy capture
… 650% over the last ten years. Permanent Magnet Synchronous Generators (PMSGs) have become prominent in large wind energy system applications. The Radial Flux machine topology has become particularly attractive. In order to improve the competitiveness of large wind energy systems, the main focal …
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Novel PV Solar Farm Control as STATCOM (PV-STATCOM) for SSR Mitigation in Synchronous Generators and Wind Farms
… series compensation can potentially cause subsynchronous resonance (SSR) which can lead to significant damage in shafts of synchronous generators and wind farms. Dynamic reactive power compensators such as STATCOM and SVCs are typically used for mitigation of SSR, but these are quite …
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A Novel Inverter Based Resource Control Strategy to Facilitate Utility-Scale Renewable Integration and Retain Existing Transmission Protection Infrastructure
… different fault response than conventional synchronous generators. The existing protection infrastructure for the North American transmission network was not designed with the behavior of these Inverter Based Resources (IBR) in mind. As IBR penetration continues to increase, the overall …
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Impact of high penetration of PV generation on power system transient stability and fault current; modeling for real-time studies
… shift has raised major challenges of replacing synchronous machines and their well-known dynamics with power-electronics interfaced generation whose behavior and response when integrated to the bulk power system is yet to be fully understood. Over the years, many researchers investigated the …
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Control and Operation of a Microgrid Involving a PEM Fuel Cell Through Analysis and Experimentation
… membrane fuel cell (PEMFC) power module and two synchronous generators operating in an islanded mode. The work includes the experimental investigation of the dynamic characteristics of the distributed generators in this prototype microgrid. A control and operation system is developed for the …
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Using Intrinsic 3rd Harmonics for Large Synchronous Generator Insulation Fault Condition Monitoring
… power industry, the operational health of large synchronous generators is a primary concern for generator owners. This concern has become more pressing as many owners seek to extend the lifespan of their aging generation facilities. With the construction of numerous data centers and the …
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Analysis and Planning of Power Transmission System Subject to Uncertainties in the Grid
… of utility-scale Photo-Voltaic (PV) sources. Synchronous generators provide inertia that helps in damping oscillations that arise due to fluctuations in the power system. Therefore, as PV generators replace the conventional synchronous generators, power transmission systems become vulnerable …
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Design of 10 MW low inductance PM generator for direct drive offshore wind turbine
Direct drive permanent magnet synchronous generators (PMSG) in wind turbine applications are becoming increasingly popular due to their reliability compared to medium speed generators with a gearbox. A proposed generator-drive scheme with reduced active switching provides a way to reduce the power …
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Simulação de falta no enrolamento de campo de geradores síncronos pelo método dos elementos finitos
… detection – also called as field coils – of synchronous generators through simulation of a typical machine of thermoelectrical power plants moved by heavy duty stationary turbines (not aeroderivative). It is applied a known detection technique, the air gap magnetic flux variation analysis, …
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Modeling techniques and control strategies for inverter dominated microgrids
… is concerned. Conventional fossil fuel based generators are connected in parallel to renewable energy sources as well as battery systems. The main contributions of this work comprise of: The analysis of detailed models and control structures of grid inverters, synchronous generators and …
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Incremental Quantities Based Permissive Overreaching Transfer Trip Scheme for Protecting Inverter-Based Renewable Resources
… are designed around the internal dynamic of synchronous generators where they can supply an elevated fault current. This thesis explores a protection scheme designed to enhance the security of IBRs. The incremental characteristics of voltage and current coupled with the Permissive …
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