Distribution Network Operation with High Penetration of Renewable Energy Sources
| dc.contributor.advisor | Mokryani, Geev | |
| dc.contributor.advisor | Rajamani, Haile S. | |
| dc.contributor.advisor | Abd-Alhameed, Raed | |
| dc.contributor.author | Zubo, Rana H.A. | |
| dc.date.accessioned | 2020-12-18T12:42:06Z | |
| dc.date.available | 2020-12-18T12:42:06Z | |
| dc.date.issued | 2019 | |
| dc.identifier.uri | http://hdl.handle.net/10454/18267 | |
| dc.description.abstract | Distributed generators (DGs) are proposed as a possible solution to supply economic and reliable electricity to customers. It is adapted to overcome the challenges that are characterized by centralized generation such as transmission and distribution losses, high cost of fossil fuels and environmental damage. This work presents the basic principles of integrating renewable DGs in low voltage distribution networks and particularly focuses on the operation of DG installations and their impacts on active and reactive power. In this thesis, a novel technique that applies the stochastic approach for the operation of distribution networks with considering active network management (ANM) schemes and demand response (DR) within a joint active and reactive distribution market environment is proposed. The projected model is maximized based on social welfare (SW) using market-based joint active and reactive optimal power flow (OPF). The intermittent behaviour of renewable sources (such as solar irradiance and wind speed) and the load demands are modelled through Scenario-Tree technique. The distributed network frame is recast using mixed-integer linear programming (MILP) that is solved by using the GAMS software and then the obtained results are being analysed and discussed. In addition, the impact of wind and solar power penetration on the active and reactive distribution locational prices (D-LMPs) within the distribution market environment is explored in terms of the maximization of SW considering the uncertainty related to solar irradiance, wind speed and load demands. Finally, a realistic case study (16-bus UK generic medium voltage distribution system) is used to demonstrate the effectiveness of the proposed method. Results show that ANM schemes and DR integration lead to an increase in the social welfare and total dispatched active and reactive power and consequently decrease in active and reactive D-LMPs. | en_US |
| dc.description.sponsorship | Ministry of Higher Education and Scientific Research - Iraq | en_US |
| dc.language.iso | en | en_US |
| dc.rights | <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-nd/3.0/88x31.png" /></a><br />The University of Bradford theses are licenced under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Licence</a>. | eng |
| dc.subject | Distribution electricity market | en_US |
| dc.subject | Uncertainty modelling | en_US |
| dc.subject | Social welfare maximization | en_US |
| dc.subject | Demand response | en_US |
| dc.subject | Active network management | en_US |
| dc.subject | Linearization | en_US |
| dc.subject | Optimization | en_US |
| dc.subject | Distribution locational marginal prices | en_US |
| dc.subject | Renewable energy sources | en_US |
| dc.subject | Distributed generators | en_US |
| dc.subject | Distribution network | en_US |
| dc.title | Distribution Network Operation with High Penetration of Renewable Energy Sources | en_US |
| dc.type.qualificationlevel | doctoral | en_US |
| dc.publisher.institution | University of Bradford | eng |
| dc.publisher.department | Faculty of Engineering and Informatics | en_US |
| dc.type | Thesis | eng |
| dc.type.qualificationname | PhD | en_US |
| dc.date.awarded | 2019 | |
| dc.description.publicnotes | The selected author's publications, the published versions of which were attached at the end of the thesis, have been removed due to copyright. | en |
| refterms.dateFOA | 2020-12-18T12:42:07Z |
Item file(s)
This item appears in the following Collection(s)
Related items
Showing items related by title, author, creator and subject.
-
Polymer blends in a contraction-expansion flow.We have probed the coupling between flow and concentration fluctuations in polymer blends using small-angle neutron scattering. We utilized a recirculating cell with a slot die, enabling us to measure the behavior at the entrance, within and at the exit of a contraction-expansion flow. While, as expected, anisotropy was observed in all nonquiescent experiments, the correlation lengths associated with the concentration fluctuations are found to be "stretched" more in the direction perpendicular to the flow at all positions along the centerline of the flow, except at the slot die exit. To gain insight into the observations, we present calculations of the scattering based on a multiscale approach, which bridges the gap between macroscopic Newtonian fluid dynamics and the convection of nanoscale concentration fluctuations. However, we find that this model contains insufficient physics to correctly describe our observations. Consequently, we argue that the deformation of the correlation length is primarily due to the coupling between weakly non-Newtonian stresses and thermodynamics
-
Complete Surface Current Surface Distribution in a Normal-Mode Helical Antenna using a Galerkin Solution with Sinusoidal Basis FunctionsAn investigation of the surface current distribution in a normal-mode helical antenna (NMHA) is reported. This enables precise prediction of the performance of NMHAs, since traditional wire-antenna simulations ignore important details, such as non-uniform and transverse current distributions. A moment-method formulation is developed, using two-dimensional basis functions to represent the total non-uniform surface current distribution over the surface of the wire of the helix. Piecewise-sinusoidal basis functions are employed in two normal directions, with an exact kernel formulation and application of Galerkin's solution method. The numerical solution of the singular integrals associated with self-impedance terms was computed with a very low relative error. The surface current distribution was computed for different helix geometries. It was found that the axially-directed component of the current distribution around the surface of the wire was highly non-uniform and that there was also a significant circumferential current flow due to inter-turn capacitance, both effects that are overlooked by standard filamentary current representations.
-
A new paradigm for disc-pad interface models in friction brake systemIn this paper a 2D coupled thermal-stress finite element model is established and used to predict thermal phenomena at the disc-pad interface of a disc brake system. The importance of certain critical settings and parameters for the 2D FE model has been identified (such as, a limited degree of freedom for a brake pad in place of accepted practice that considers uniform contact), here a non-uniform pressure distribution resulting from friction bending moment effects due to the introduction of a pivot point. These parameters affect the distributions of both interface temperature and pressure. The simulation results show that when the interface conductance h is 10^6 W/m^2K or higher, the interface temperature distribution is no longer sensitive to friction bending moment effects. However, when h is 30000 W/m^2K or lower, the interface temperature distribution and heat partition ratio are significantly affected by the setting used for the rotational degree of freedom of the pad. The simulation results provide a useful reference for a better design of a disc brake system for different applications.
