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Development of a complete framework for stability studies in distribution systems with the connection of synchronous generators

Grant number: 09/17920-0
Support Opportunities:Regular Research Grants
Duration: April 01, 2010 - March 31, 2012
Field of knowledge:Engineering - Electrical Engineering - Power Systems
Principal Investigator:Rodrigo Andrade Ramos
Grantee:Rodrigo Andrade Ramos
Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil


The electric energy distribution feeders have always operated as passive networks, merely transmitting the energy from the substation to the loads connected to them. Nevertheless, this paradigm recently started to change with the concept of distributed generation. Especially in Brazil, the utilization of the waste coming from the ethanol production is a promising source of electric energy that can be extracted from cogeneration schemes, most of which will possibly be connected to distribution feeders. On the other hand, concerns over the angle stability of multiple generators connected to the same distribution branch prevent, nowadays, the connection of two or more generators to a single feeder. These concerns come mainly from the non-existence of adequate tools for the analysis of this kind of stability in distribution systems. Among the factors that justify this non-existence, the most important one is certainly the level of imbalance between phases of the distribution system, which is proportionally much more significant than the one observed in transmission systems. For this reason, the available tools for the analysis of angle stability in transmission systems cannot simply be applied without modification to distribution systems. Considering these arguments, the present project proposes the development of a complete approach to perform the angle stability analysis in distribution systems, with the connection of multiple synchronous generators, which will consist in a set of tools capable of performing analyses both from the small and large disturbance viewpoints. It is important to remark that the main contribution of this project will be the consideration of the imbalance between phases in the development of this set of tools, and that the success of this project might significantly contribute to a better utilization of the electric energy from this important renewable source that is the cogeneration from sugar cane waste. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SALIM, R. H.; OLESKOVICZ, M.; RAMOS, R. A.. Power quality of distributed generation systems as affected by electromechanical oscillations - definitions and possible solutions. IET GENERATION TRANSMISSION & DISTRIBUTION, v. 5, n. 11, p. 1114-1123, . (08/03876-6, 09/17920-0)
SANTOS, J. A.; PIARDI, A. B.; PESENTE, J. R.; SALIM, R. H.; OTTO, R. B.; RAMOS, R. A.; IEEE. A Comparative Analysis between Two Approaches for the Simulation of Power System Electromechanical Transients. 2012 SIXTH IEEE/PES TRANSMISSION AND DISTRIBUTION: LATIN AMERICA CONFERENCE AND EXPOSITION (T&D-LA), v. N/A, p. 6-pg., . (09/17920-0)
SALIM, RODRIGO HARTSTEIN; RAMOS, RODRIGO ANDRADE. A Model-Based Approach for Small-Signal Stability Assessment of Unbalanced Power Systems. IEEE Transactions on Power Systems, v. 27, n. 4, p. 2006-2014, . (08/03876-6, 09/17920-0)

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