Diseño y construcción de la protección de distancia mediante filtros Kalman para el modelo a escala de la línea de transmisión Coca Codo Sinclair - El inga de 500 kV del laboratorio de sistemas eléctricos de potencia

Abstract

This technical project is focused on the design and construction of a distance digital protection based on Kalman filter for the scale model of the Coca Codo Sinclair - El Inga 500-kV transmission line of the Power Electric Systems Laboratory of the National Polytechnic School. For its development, transducers for current and resistive dividers for voltage measurements are used for taking the existing transmission-line signals, and then they are conditioned by an electronic circuit to be entered into a development card STM 32F407 Discovery. In such a card the algorithm, which is based on the Kalman filter methodology that adapts to the conditions of the electrical system, is developed into the microprocessor language to finally perform the detection, classification and location of the fault. Based on this algorithm, the microprocessor sends a trip signal to electromechanical elements, such as a three-phase contactor commanded by a solid-state relay, which is in charge of disconnecting only the faulted phase or phases, in a millisecond time span. As a result, the implemented protection system is verified by entire process tests that it provides security, reliability, flexibility and speed.