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Technical impacts caused by the connection of generators to low voltage distribution networks

Grant number: 12/07488-6
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): July 01, 2012
Effective date (End): June 30, 2013
Field of knowledge:Engineering - Electrical Engineering - Power Systems
Principal Investigator:Walmir de Freitas Filho
Grantee:Thiago Sonnewend Diniz Ferreira
Host Institution: Faculdade de Engenharia Elétrica e de Computação (FEEC). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:10/01690-2 - Technological development for protection, analysis, supervision and automation of electrical power systems of the future, AP.TEM


The impacts caused by the connection of three-phase, medium size generators (e 1 MVA) directly to primary distribution networks (e 10 kV) have been intensively investigated in the last 10 years. Consequently, practices of analysis, operation, and protection are relatively well defined and accepted. However, with the publication of the Technical Note 0043/2010-RD/ANEEL and other actions, one can see that the Brazilian government wants to incentive the usage of distributed generation-based renewable energy (mainly photovoltaic panels) in low voltage distribution networks (d 220 V). Such facts lead to a new scenario different from the previous one investigated in the last 10 years, demanding new analysis. Therefore, in this project the objective is to determine the main impacts caused by the installation of single-phase, small-size generators (< 500 kVA) into low voltage distribution networks (d 220 V). The impacts to be analyzed are voltage profile, voltage unbalance, overload, short-circuit currents, and harmonic distortion.(AU)

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