Banca de DEFESA: ALAN ROBSON ANDRADE PINTO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ALAN ROBSON ANDRADE PINTO
DATE: 19/01/2024
TIME: 10:00
LOCAL: https://meet.google.com/utz-jjtr-frs
TITLE:

Transformerless Single-Phase Uninterruptible Power Supply with Interleaved Boost Converters for Battery Discharge

KEY WORDS:

Rectifier, Inverter, DC-Link, PWM, Control

PAGES: 110
BIG AREA: Engenharias
AREA: Engenharia Elétrica
SUBÁREA: Eletrônica Industrial, Sistemas e Controles Eletrônicos
SPECIALTY: Eletrônica Industrial
SUMMARY:

This work focuses on studying and proposing a circuit configuration and reducing the number of controlled switches for single-phase, transformerless uninterruptible power supplies (UPS) using double-conversion topology. In this context, the inclusion of an additional static switch, strategically positioned to enable a new circuit configuration forming the converter, will allow the battery bank to be discharged using two arms.

The classic UPS configuration with double-conversion topology uses four arms in total. Three of them are responsible for forming the rectifier and inverter, while the fourth arm is dedicated to charging the battery bank in mains mode. Normally, classic double-conversion UPSs are described with a static switch responsible for changing the system's operating mode, of which there are three (mains mode, battery mode, bypass mode). With the addition of another static switch, the fourth arm is used in battery mode to reduce the ripple of the battery bank current during discharge, improving the efficiency of the converter. This means that the UPS uses all six controlled switches in both operating modes.

For the proposal, the dynamic models and/or topological state analyses are presented, and the PWM strategies and control strategies are developed. As far as PWM strategies are concerned, a sine-delta modulation is applied which varies according to configuration and operating mode, and can be a function of the polarity of the phase currents or just the pole voltages. The control system uses the classic continuous control technique in the frequency domain, while the mains signals (voltage and current) are kept in sync with the load via the PLL structure.

COMMITTEE MEMBERS:
Presidente - 3161890 - FILIPE ANTONIO DA COSTA BAHIA
Externo à Instituição - JOÃO PAULO RAMOS AGRA MÉLLO
Externo à Instituição - REUBEN PALMER REZENDE DE SOUSA
Externa à Instituição - AMANDA PEREIRA MONTEIRO