Date of Award
2020
Document Type
Dissertation
Degree Name
Ph.D.
Department
Electrical Engineering
First Advisor
Amin Khodaei
Second Advisor
Kimon P. Valvanis
Third Advisor
Mohammad Abdul Matin
Fourth Advisor
Shimelis Assefa
Keywords
Critical bus, Microgrid, Objective function, Operation cost, Reactive power, Solar
Abstract
Reactive power plays an essential role in voltage control and stability in electric power systems. Various Volt/VAR techniques are utilized in electric power systems to maintain the voltage profile within defined acceptable limits and accordingly provide reliability and stability. Reactive power has been commonly generated through large-scale synchronous generators or distributed capacitor banks to provide proper transmission and distribution level system management, however, reactive power can be further used as an effective means to reduce total system operation cost. In this dissertation, an optimal reactive power model is proposed to determine the optimal nodal reactive powers that result in the lowest total system operation cost. Microgrid is introduced as a source of real and reactive power where its capability curve as a single generator unit is further determined and utilized. An optimization-based method is proposed to determine this capability curve. The results of numerical analyses of this proposal show how the reactive power behaves under gradual changing of real power generation in a microgrid and how these two outputs are correlated. This model is further integrated into an optimal power flow problem to show the potential economic benefits of microgrid-generated reactive power of the larger system. The numerical analyses on standard test systems show the performance of the proposed model and provide insights on the role of microgrid as a source of reactive power in the system.
Publication Statement
Copyright is held by the author. User is responsible for all copyright compliance.
Recommended Citation
Hasan, Sarhan, "Microgrid-Enabled Reactive Power Support to Enhance Grid Economics" (2020). Electronic Theses and Dissertations. 1773.
https://digitalcommons.du.edu/etd/1773
Provenance
Received from ProQuest
Rights holder
Sarhan Hasan
File size
66 p.
Copyright date
2020
File format
application/pdf
Language
en
Discipline
Electrical engineering, Energy, Engineering