Modelagem e implementação de fluxo de carga trifásico e curto-circuito por componentes de fase em redes de distribuição com geração distribuída no aplicativo computacional MyGrid

Abstract

Distribution Management System (DMS), were subjected to significant changes in their functions, architecture and computing characteristics. In (MISHRA; DAS, 2008), it is said that to address urgent issues of power quality and reliability of the distribution system and to fully explore the introduction of automation, electronic power devices and Distributed Generation (DG), the classical DMS functions were revised and new tasks were introduced. Modern DMS adopts open architecture systems, targeting local networks, wide area networks and for distributed computing.In this scenario, Object Oriented (OO) methods are particularly attractive because OO modeling and programming allow the full exploitation of the advantages of new architectures and ensure flexibility, scalability, and ease of maintenance of SGDE software functions and packages (MISHRA; DAS, 2008). Traditionally, commercial electrical power system analysis software does not provide short-circuit and load flow analysis models for integration with automation applications and at the same time use classical calculus methods that may be unsuitable for studies of Radial Distribution Electrical Networks (REDN). This work presents a tool, called MyGrid, developed in the DEE-UFC Intelligent Electrical Networks Group (GREI), capable of: representing REDN through OO and Node-Depth Encoding (NDP); to perform short-circuit studies and load flow of REDN with DG, of low computational cost for real time use, allowing its integration with automation systems. In addition to justifying and presenting the network modeling by phase components, the load flow method with DG implanted in MyGrid will be described and a new short-circuit method with DG by phase components in REDN, considering sources of constant voltage. This work presents satisfactory results of load flow and short circuit studies performed with Mygrid in distribution test networks, which were validated in the WINDMIL tool.