Análisis y Evaluación del Comportamiento del Thdi a Causa de la Conexión Masiva de Vehículos Eléctricos en una Estación de Carga

Abstract

This document present the THDi behavior analysis because of the massive VE connection with different load conditions, by modeling an EV charging station. Additionally, is presented the design and implementation of a battery charger, with low harmonic distortion. The conventional Boost and IBC topologies were chosen, by which were designed and simulated four chargers of EV supporting the types of semi-fast and slow loading, and loading modes 2 and 3 of the international standard IEC 61851-1, 2010. The Chargers have two stages; the first is a PFC and the second a DC-DC converter. The first stage requires control to allow the input current follows the waveform of the mains voltage, so that average current control was designed; for the second stage were designed two controls to ensure constant current- constant voltage charging method. In addition, a model EV battery that emulates the behavior of a real was developed, in order to check the voltage and the SOC during the charging process. Then, based on probability curves obtained from the literature review, a charging station with 15 bays was designed, in which several scenarios as case studies were proposed. Such cases were simulated with the chargers designed and were differentiated mainly by the number of VE and the type of charger. Subsequently the results of the simulations were shown, analyzing THDi behavior for each case. Finally the design, simulation and implementation of the charger were performed, for which the boost topology was selected as PFC. Their respective controls, fittings and filters were designed, and the results were presented.