Power quality analysis in Durango’s sewage treatment plant

Abstract

This energy study is developed within a wastewater treatment plant by aerated lagoons, where a series of problems such as activation of temperature protections, phase loss and thermal protections are presented. When analyzing the electrical installation and the constitution of each motor, the hypothesis of a possible presence of harmonics outside the established ranges that are producing distortion and increase of the voltage and current signal, as well as a possible resonance, was raised. For this reason, it is intended to carry out an Electrical energy quality analysis in electrical machines of the PTAR de Aguas del Municipio de Durango, through specialized equipment and based on international standards. The power quality analysis contemplates the analysis of: voltage, current, individual harmonic content, THDv, THDi. The methodology proposed by Dugan, McGranaghan, Santoso, & Beaty (2004) and the performance of energy diagnoses according to what was established by Sifuentes et al (2016) were used. As a result, the confirmation of the hypothesis is obtained where the motor that contains power electronics is a source of harmonics that are amplified by the capacitor bank.