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 8 of 8 for “"Reactive power injection"”.
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Smart-grid-enabled distributed reactive power support with conservation of voltage reduction
… energy continues to increase in the current power grid, the reactive power support capability from photovoltaic grid-tie inverters may be used to regulate feeder voltage and reduce system losses on medium- and low-voltage distribution systems. The focus of this thesis is to develop a …
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Designing Reactive Power Control Rules for Smart Inverters using Machine Learning
Due to increasing penetration of solar power generation, distribution grids are facing a number of challenges. Frequent reverse active power flows can result in rapid fluctuations in voltage magnitudes. However, with the revised IEEE 1547 standard, smart inverters can actively control their …
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Architectures and algorithms for voltage control in power distribution systems
… hierarchical control architecture for voltage in power distribution networks where there is a separation between the slow time-scale, in which the settings of conventional voltage regulation devices are adjusted, and the fast time-scale, in which voltage regulation through active/reactive power …
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Design and Evaluation of a Photovoltaic Inverter with Grid-Tracking and Grid-Forming Controls
… the stabilization of the grid frequency during power system dynamics. The purpose of this thesis is primarily to present the design of a grid-forming control scheme based on the VSM and the derivation of the terminal dq-frame ac impedance of the small-signal model of the inverter and control …
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Data-driven coordination of assets in power distribution systems for ancillary service provision
… distributed energy resources (DERs) in power distribution systems to provide ancillary services including active power provision and reactive power regulation. The proposed frameworks generally consist of three components, namely (i) an input-output (IO) model of the system describing …
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Drivers of change in the North American electric grid
… propagation, which is caused by an imbalance in power supply and demand at any location of an electric grid. The delay associated with this phenomenon is generally observed in large-scale interconnected power systems, and the impact of large changes in load or generation can be felt over a wide …
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A Coordinated Voltage Management Method Utilizing Battery Energy Storage Systems and Smart PV Inverters in Distribution Networks with High PV and Wind Penetrations
… nominal grid voltage limits due to the excess power from the DG. DSOs are accustomed to improving the voltage profile by optimal adjustments of the on-load tap changers, voltage regulator taps and capacitor banks. Nevertheless, due to the frequent variability of the output energy from DG, these …
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Βέλτιστος σχεδιασμός μικρο-αντιστροφέα τύπου flyback για τη σύνδεση φωτοβολταϊκού πλαισίου με το δίκτυο χαμηλής τάσης
Σε αντίθεση με τις συνήθεις μορφές παραγωγής ενέργειας, φωτοβολταϊκά (Φ/Β) συστήματα δύναται να εγκατασταθούν εντός κατοικημένων περιοχών (κτηριακά Φ/Β συστήματα), όπου βρίσκεται και το μεγαλύτερο ποσοστό της κατανάλωσης ηλεκτρικής ενέργειας. Για τη παροχή της ενέργειας των Φ/Β πλαισίων στο δίκτυο, …