Date of Award
Master of Engineering Science
Electrical and Computer Engineering
Professor Amimaser Yazdani
Electrification of off-grid remote communities is commonly accomplished through diesel generators. The method may even be employed in cases where there exists an un reliable connection to the power grid. Regardless, the method is environmentally-hostile, typically costly, and likely risky. Therefore, to mitigate the reliance on diesel fuel, uti lization of renewable energy resources has been considered in recent years. This thesis investigates the feasibility of and technical considerations involved in the employment of a specific class of variable-speed wind-power systems, integrated with battery energy stor age, for remote electrification applications.
The wind-power system under consideration is based on the doubly-fed induction gen erator (DFIG) technology, which features a number of characteristics that render it at tractive for the incorporation of battery energy storage. This thesis identifies the control strategy, different control sub-functions, and the controllers structures/parametes required to accommodate the battery energy storage. The developed control strategy enables the operation of the wind-power/storage system in the off-grid (islanded) mode of operation, as well as the grid-connected mode of operation. Under the developed control strategy, the wind-power/storage system can operate in parallel with constant-speed wind-power units, passive loads, and induction motor loads. The effectiveness of the proposed control strategy has been demonstrated through comprehensive simulation studies enabled by the commercial software package PSCAD/EMTDC.
In addition to the control aspects, this thesis studies the reliability aspects of the pro posed wind-power/storage system, for an example remote electrification system. Thus, a new reliability assessment method has been developed in this thesis, which combines the existing analytical and simulation-based probabilistic approaches. The reliability analysis conducted indicates that the battery energy storage capacity, the wind magnitude and pro file, and the load profile impose remarkable impacts on the reliability of the electrification system. It also indicates that a connection to the power grid, however unreliable, signifi cantly mitigates the need for a large battery to achieve a given degree of reliability.
Bhuiyan, Faruk Ahmed, "A Doubly-Fed Induction Generator (DFIG)-Based Wind-Power System with Integrated Energy Storage for Remote Electrification" (2009). Digitized Theses. 3801.