Ebrahimi_Salari_Mahdi_2018_Direct.pdf (16.92 MB)
Direct interconnection technique applied to marine renewable generators, specifically airborne wind energy
thesis
posted on 2022-09-02, 10:25 authored by Mahdi Ebrahimi SalariThis thesis explores application of the Direct Interconnection Technique (DIT) to Marine
Renewable Energy (MRE) devices specifically Airborne Wind Energy (AWE).
Interconnecting offshore generators and delivering generated power to the grid are critical
challenges in dealing with offshore generation. In offshore renewable energy (wind)
generation, (unlike conventional steam or gas plants which are dispatchable), the prime
mover is non-dispatchable and generated power changes with wind conditions. By current
design power converters are integrated with each offshore generator and after these power
converters interconnected through the transmission system to grid onshore. Because of long
distances from the shore, the repair and maintenance for offshore plant including power
converters is very expensive and system reliability is most important as mobilising in
response to faults offshore takes considerable time with considerable associated cost and
missed opportunity / missed generation costs. These are motivating factors in developing
AWE systems and in development of integration solutions for off shore farms.
A comprehensive research work to design, develop and examine the use of DIT for
offshore non-reversing pumping mode AWE systems has been performed, shown to be
effective and improve the ruggedness of the offshore installation by relocating power
converters to shore. A laboratory hardware setup has been developed to emulate a small
AWE farm. The hardware setup is used to develop and examine a holistic DIT approach for
AWE farms. For the first time, a series of experimental tests of a DIT algorithm for AWE
systems has been carried out. The test results prove the theoretical expectations and the
technical feasibility of the direct interconnection technique for non-reversing pumping
mode AWE devices. Also, computer simulation models have been developed to research
with more flexibility. The performance of the directly interconnected AWE systems under
normal and fault conditions has been studied. The outcomes can be used in the design of a
universal protection system. The quality of the power generated by the directly
interconnected AWEs has been evaluated. Proper controllers have been developed to
control the load balance and reactive power exchange of the directly interconnected AWE
generators. By the implementation of the proposed active and reactive power controllers a
notable improvement in power quality has been achieved.
Funding
EFFECTS OF DIET FORMULATION ON ZOONOTIC PATHOGENS IN SWINE FECES AND MANURE
Agricultural Research Service
Find out more...Vibrational Energy Transfer and Shock Waves in Molecular Materials
Directorate for Mathematical & Physical Sciences
Find out more...Study on Aerodynamic Characteristics Control of Slender Body Using Active Flow Control Technique
Japan Society for the Promotion of Science
Find out more...History
Degree
- Doctoral
First supervisor
Toal, DanielSecond supervisor
Colemna, JosephNote
peer-reviewedOther Funding information
SFI, ERCLanguage
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