Automação em sistemas de potência: arquitetura de chaveamento considerando disponibilidade de fontes, demanda e prioridade de cargas.

Abstract

Through the possibility of converting local electrical energy, it is possible that consumers have more than one source to supply their demand at the same time. Switching between sources and loads is expected to require a supervision and control that maintains continuity of service, avoids reconnections abrupt and still respect the priority of loads. In this work, we propose a supervision architecture for control for switching sources and loads, being used as an example a photovoltaic system (SFV) connected to the electrical grid public. Switching from sources to loads is carried out by transfers, which operate according to the priority of loads and must carry out the turning on or off, observing the energy supply, also avoiding the payment of fines for exceeding demand. In the application example, considered on grid and off grid photovoltaic systems, and the use of each depends on the application and/or availability of energy resources. It was also considered the presence of an energy storage system that feeds a group of essential loads, at specific times of the day, including peak hours and/or as an emergency system, in the event of a power failure in the dealership. Dynamic and logical analyzes were performed via simulation computational, to verify the fulfillment of the requirements and feasibility of the module monitoring, control and command of the switches. It was observed that the architecture proposal meets the requirements, maintaining continuity in service and, when necessary, prioritizing the supply of some loads to the detriment of others.