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| Author(s): |
Felipe Bayma Barbosa Rolim
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Elétrica e de Computação |
| Defense date: | 2020-10-29 |
| Examining board members: |
Fernanda Caseño Trindade Arioli;
Fábio Bertequini Leão;
Maria Cristina Dias Tavares
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| Advisor: | Fernanda Caseño Trindade Arioli |
| Abstract | |
Electric power distribution systems have been submitted to major changes related to the integration of new technologies such as distributed generators, electric vehicles, energy storage systems, smart meters with two-way communication, and digital protection equipment. Currently, technological advances related to the digital protection equipment, such as high sampling rate and the capability of communication and remote readjustments have allowed greater flexibility, reliability, and better performance at reasonable costs. Therefore, the use of this equipment allows implementing new specialized protection schemes, minimizing the cases of false operation, improving diagnostics, as well as accelerating the short circuit interruption. However, in most cases, the functionalities available in the digital equipment are not fully exploited and the protection practices agree with those from the time when the relays were electromechanical. Thus, studies are needed to evaluate the best use of its functionalities for the protection of electric power distribution networks. In this context, this work proposes an optimization model, through the mixed integer linear programming, for the calculation of the phase protection function adjustments and a multiobjective model applying mixed integer linear programming for the calculation of the neutral protection function adjustments. Additionally, an index based on the equivalent impedance of Thévenin is developed as a criterion to trigger the automatic adaptation of the adjustments applied to the protection system. Therefore, the functionalities present or potentially present in modern protection equipment are explored for the development of a new adaptive overcurrent protection methodology, and tests of different operation modes of a real network are presented. With the results obtained, the usefulness and efficiency of the proposed methodology are verified, which provides improvements in the performance of the protection system (AU) | |
| FAPESP's process: | 17/20880-6 - Development of adaptive protection methodology for modern systems of electrical energy distribution |
| Grantee: | Felipe Bayma Barbosa Rolim |
| Support Opportunities: | Scholarships in Brazil - Master |