Modelagem e análise em ATP do comportamento da microrrede do condomínio residencial Alphaville-Fortaleza

Abstract

Modern society demands more and more for a reliable, safe and quality energy supply. In addition, factors such as the emergence of new technologies, environmental impacts and the increasing demand for energy contribute to the development of new solutions and evolution of the electrical networks with the insertion of distributed generation and microgrids. The microgrids are a group of controllable loads and distributed energy resources, like distributed generation and storage systems, which operate in a coordinated way, acting as a single subsystem which is controllable from the point of view of the external network, being able to operate both connected or disconnected from this external network, whithout posing risks to it’s integrity. This work aims to present the results of an analysis of the voltage levels of a microgrid of a high standard residential condominium, with balanced and unbalanced loads, operating in islanded and connected mode, performed in ATP. For this purpose, the data of the technologies which integrate the microgrid and its modes of operation were collected in order to carry out its modeling in the ATP software, which is a widely used tool for the analysis of Electromagnetic Transients. In the program, models were designed for the electical loads, distributed generation sources, storage systems and the feeders which compose the electrical grid that supplies the condominium. Through this modelling, an analysis of voltage levels was carried out for situations of balanced and unbalanced loads in combination with islanded and connected modes, in addition to voltage levels for the ocurrences of single-phase and three-phase short circuits in connected mode. The simulations carried out through the model show that small-scale distributed generation sources have little impact on the increase of voltage level on the low voltage side, and even less on the medium voltage side of the grid. In addition, it could be verified that the generation connected to overloaded phases helps improving voltage levels. The assessment of short-circuit levels shows a small increase caused by the addition of these small-scale distributed generation sources on the low voltage side. Finally, it could be verified that the examined microgrid does not cause any significant impact on the distribution grid and brings many benefits to the consumer units that are a of this microgrid.