modelagem e métodos numéricos para otimização de sistemas ...

Abstract of Thesis presented to COPPE/UFRJ as a partial fulfillment of the
requirements for the degree of Doctor of Science (D.Sc.)
A METHODOLOGY FOR ANALYSIS OF N-CONDUCTOR ELECTRICAL
SYSTEMS USING THE CURRENT INJECTION METHOD
Débora Rosana Ribeiro Penido
March / 2008
Advisors: Sandoval Carneiro Júnior
José Luiz Rezende Pereira
Department: Electrical Engineering
This work proposes the development of a methodology for analysis of n-
conductor electrical systems, the N Conductor Current Injection Method – NCIM. The
method, equipment models and controls are developed. Many characteristics of the
proposed methodology are discussed as well as potential analysis.
NCIM is based on the Current Injection Method in rectangular coordinates; it is
defined directly in phase coordinates and uses in the solution process the Newton-
Raphson method.
The NCIM development had the proposal of represent the systems with many
details since it was desirable and possible, thus more complete analysis could be
realized. For that reason the component modeling was created based in the elements, as
a result the methodology become very flexible, and the controls representation was done
in an optimized way. As a consequence, the system dimension to be solved by the
method is strictly necessary, and it is possible to model components with any number of
conductors, in many configurations. It is possible to represent unbalances, mutual
couplings, neutral conductors, groundings and the earth in an explicit manner,
distributed generations, besides other characteristics.
NCIM is shown to be efficient and computationaly robust, it can be used to
analyze both balanced and unbalanced systems, radial or meshed, and can simulate the
transmission, sub-transmission and distribution, including large-scale systems.
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