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Chowdhury, D., Hossain, M.F., Miah, M.S., Hossain, M.M., Sheikh, M.N.U., Rahman, M.M. and Hasan, M.M. (2018) Design and Implementation of a Switching Converters Based Power System for Regions Victim to Frequent Power Outage. SoutheastCon 2018 Proceedings, St. Petersburg, FL, 19-22 April 2018, 1-6.
https://doi.org/10.1109/SECON.2018.8478910

has been cited by the following article:

• TITLE: Grid-Connected Emergency Back-Up Power Supply

  AUTHORS: Dhiman Chowdhury, Mohammad Sharif Miah, Md. F. Hossain

  KEYWORDS: Back-Up Power Supply, Laplace Domain, Push-Pull Inverter, State Averaging Model, Switching Converter Model

  JOURNAL NAME: Circuits and Systems, Vol.10 No.1, January 31, 2019

  ABSTRACT: This paper documents design and modeling of a grid-connected emergency back-up power supply for medium power applications. Back-up power supplies are very important in regard to support electrical loads in the events of grid power outage. However, grid-integration of a back-up power supply substantiates continual power transfer to the loads, especially to the critical loads, which should not suffer from power interruptions. Therefore, design and circuit modeling of switching converters based reliable grid-tied emergency back-up power supply are presented in this paper. There are a rectifier-link boost derived battery charging circuit and a 4-switch push-pull power inverter circuit which are controlled by high frequency pulse width modulation (PWM) signals. This paper presents a state averaging model and Laplace domain transfer function of the charging circuit and a switching converter model of the power inverter circuit. A changeover relay based transfer switch controls the power flow towards the utility loads. During off-grid situations, loads are fed power by the proposed inverter circuit and during on-grid situations, battery is charged by an ac-link rectifier-fed boost converter. However, there is a relay switching circuit to control the charging phenomenon of the battery. The proposed design is simulated in PLECS and the simulation results corroborate the reliability of the presented framework.