Dispositivo de simulação de transformador trifásico para validação de circuitos de medição de energia na etapa de pós condicionamento

Abstract

The Management System for Operations and Combating Losses in the Low Voltage Electricity Distribution Network (SGRede-BT) is responsible for remotely monitoring, in real time, the electrical and physical parameters in each circuit of the low voltage electricity network through of remote measurement and data acquisition units (RUs), telesupervision software and database. During the firmware development process for the company's energy meters, developers are sometimes exposed to the risk of electric shock, given that they need to make connections at communication points that are close to live parts of the meter. The purpose of this project is to develop a prototype capable of generating signals that reproduce the behavior of a three-phase transformer in normal operation, and in events such as phase loss, overvoltage, undervoltage, and harmonics of up to 40th order, but generating these signals with negligible amplitude and powers, thus eliminating the risk of electric shock. For this, a system composed of a printed circuit board with a microcontroller, memory and digital/analog converters, and a control software capable of performing the necessary calculations to generate the waveforms that reproduce the aforementioned events will be used. Creating a reliable and secure environment for performing power meter firmware tests. As main results, it is possible to mention the successful implementation of a functional version of the hardware, firmware and software of the device, capable of generating signals that do not pose a risk of electric shock to the user and compatible with energy measurement devices.