A New Missing Data Imputation Algorithm Applied to Electrical Data Loggers
Concepción Turrado, Fernando Sánchez Lasheras, JOSE LUIS CALVO ROLLE, Andrés José Piñón-Pazos, Francisco Javier de Cos Juez · Sensors · 2015
Nowadays, data collection is a key process in the study of electrical power networks when searching for harmonics and a lack of balance among phases. In this context, the lack of data of any of the main electrical variables (phase-to-neutral voltage, phase-to-phase voltage, and current in each phase and power factor) adversely affects any time series study performed. When this occurs, a data imputation process must be accomplished in order to substitute the data that is missing for estimated values. This paper presents a novel missing data imputation method based on multivariate adaptive regression splines (MARS) and compares it with the well-known technique called multivariate imputation by chained equations (MICE). The results obtained demonstrate how the proposed method outperforms the MICE algorithm.