Understanding the conducting states of active and passive switches in an inverter circuit used for power system applications

B. P. Divakar, Ka Wai Eric Cheng, D. Sutanto

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Bi-directional inverter circuits are commonly used in many applications in power systems, such as in FACTS devices, energy storage systems and active power filters. Many power engineering students however find it difficult to understand the conducting states of the active switches (transistors, IGBTs) and the passive switches (the anti-parallel diodes connected across the active switches). It seems a mystery to them that power can flow from a lower voltage ac system to a higher voltage dc system to charge the energy storage system. This paper proposes a simple chart that intuitively explains how to determine the states (either conducting or non-conducting) of the active and passive switches of an inverter. The flowchart helps students to understand the cyclic changes in the topology of the circuit in a switching cycle. The flowchart by nature is general and can be used for any type of control methods such as sinusoidal PWM and hysteresis control. The application of the use of this chart is also discussed for a battery energy storage system.
Original languageEnglish
Title of host publication2011 4th International Conference on Power Electronics Systems and Applications, PESA 2011
DOIs
Publication statusPublished - 6 Sep 2011
Event2011 4th International Conference on Power Electronics Systems and Applications, PESA 2011 - Hong Kong, Hong Kong
Duration: 8 Jun 201110 Jun 2011

Conference

Conference2011 4th International Conference on Power Electronics Systems and Applications, PESA 2011
CountryHong Kong
CityHong Kong
Period8/06/1110/06/11

Keywords

  • active filter
  • Battery Energy Storage System
  • Educational tools
  • Energy Storage System
  • Inverter operation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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