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.
Results
Showing 1 to 13 of 13 for “"Grid codes"”.
-
Grid Strength Assessment Trough Q-V Modal Analysis and Maximum Loadability of a Wind-Dominated Power System Using P-Q Regions
… by deploying large-scale wind farms into their grids. Among them, wind energy shows a promising future to substitute the traditional power plants. However, the deployment of these wind farms into the grid is not a panacea that does not pose any challenges to the grid operators. Keeping the power …
-
Overcoming Voltage Issues Associated with Integration of Photovoltaic Resources in the Electric Grid
… approach allows implementation of new grid codes and standards, which is not possible using the old step change methods of simulating cloud impacts. Furthermore, all electrical components between utility transformers and customers are modeled to eliminate the inaccuracy due to using …
-
A Framework for Assessing the Reliability of Wind Energy Conversion Systems
… increased penetration of wind energy into the grid imposes new operating conditions on power systems. This change requires development of an adequate reliability framework. This thesis proposes a framework for assessing WECS reliability in the face of external disturbances, e.g., grid faults …
-
Highly Efficient Gan-Based Single-Phase Transformer-Less Pv Grid-Tied Inverter
… needs to be improved is the power converter. Grid-tied transformer-less inverters have gained a lot of interest in recent years because of their higher efficiency, reduced volume and lower cost compared to traditional line transformer inverters.</p> <p>This dissertation discusses single-phase …
-
An Investigation into the Contribution of Hybrid Renewable Energy System to Utility Grid in the Regions with Arid Climate
… Renewable Energy Sources (RES) on the utility grid and demand curve are very limited. This dissertation illustrates the big picture of the Kingdom of Saudi Arabia regarding the current status of power generation, consumption, and the expected increase in power demand & supply, as well as …
-
Integration of wind energy systems into the grid: power quality and technical requirements
… Darling (about 4.2 MW) wind farms being the only grid connected projects in the country. However, grid integration studies carried out in [1] have shown that there are over 7 000 MW potential ideas for wind power in the Western Cape alone and this is a clear indication that there is a growing …
-
Reactive power compensation of fixed speed wind turbines using a hybrid wind turbine technology
… of wind energy into an existing power system grid can lead to increased exposure to instability. This has prompted power systems operators to revise the connection requirements for grid codes that require wind turbine generators to contribute to power control and stay online during a network …
-
Novel PV Solar Farm Control as STATCOM (PV-STATCOM) for SSR Mitigation in Synchronous Generators and Wind Farms
… a fast ramp-up technique is not envisaged in Grid Codes. The entire process of SSR damping for all cases studied takes less than half a minute. A novel coordinated control of PV-STATCOM and DFIG based Type 3 wind farms is developed for faster and effective SSR damping, when both are connected …
-
Balance of Power: Designing operational practices for balancing electricity markets with growing penetrations of renewable energy
… of power system operational practices such as grid codes, system operator processes and, in jurisdictions with wholesale competition, electricity markets. In this thesis, I explore how policy-makers should approach designing operational practices for balancing electricity markets. Because the …
-
Three-dimensional upward scheme for solving the Euler equations on unstructured tetrahedral grids
… that currently available from similar structured-grid codes. The key to achieving this result is a novel cell reconstruction process which is based on an analytical formulation for computing solution gradients within tetrahedral cells. Prior methodology requires the application of cumbersome …
-
Performance Assessment and Management of Large Wind Farms under Abnormal Grid Operating Conditions
… systems necessitates the development of grid integration standards. Wind farms during normal system operation have been well assessed for impacts like forecasting, reliability, power quality, and transient stability following its large scale integration. Fault responses and protection …
-
Creating additional network capacity on constrained medium voltage networks utilizing distributed generation (specifically PV technology)
… to assist MV networks in operating within their grid code regulations. The research then develops a coded method to be utilized for network analysis in DIgSILENT Powerfactory supported by a data analytic interface in Microsoft Excel. This analysis optimally places PV to the network to maximize …
-
Συμβολή στο σχεδιασμό ηλεκτρονικών μετατροπέων ισχύος για διασυνδεδεμένα με το δίκτυο χαμηλής τάσης φωτοβολταϊκά συστήματα
Η παρούσα διδακτορική διατριβή αναφέρεται σε διεσπαρμένες Φωτοβολταϊκές (Φ/Β) μονάδες (κτιριακά Φ/Β συστήματα) ισχύος 1–20kW, που συνδέονται στο δίκτυο διανομής χαμηλής τάσης. Ειδικότερα, το αντικείμενο της εργασίας εστιάζεται στη διερεύνηση της μεθοδολογίας ελέγχου και της συμπεριφοράς των …