Preprocesamiento de los datos de las Unidades de Medición Sincrofasorial (PMUs) utilizando la técnica limpieza de datos - Aplicación al Sistema Nacional Interconectado Ecuatoriano

Abstract

This work focuses on preprocessing on a database of Synchrophasor Measurement Units (PMUs) of the Ecuadorian National Interconnected System applying "Data Cleaning" techniques. Data include frequency, rate of frequency, phasor voltage and current positive sequence sinusoidal waves. Data Cleaning include a set of diverse functions or methodologies help detecting, diagnosing, and imputing anomalous data, with the purpose of creating a reliable database and influencing on the quality of the results of subsequent analyzes or studies. Consequently, an application is developed in MATLAB’s App Designer software for data cleaning of different synchrophasor measurements. This application allows the implementation of these techniques, and each of them executes a routine that: appropriately manages the database, describes the characteristics of the selected time signal, missing data processing, noise filtering, detection and imputation of atypical data. Each section contains several methodologies that are selected by the user, the errors are obtained of the set of methodologies applied of the cleaning process. This helps to select and validate the most suitable methods depending on the analyzed signal.