LCL filter design for grid-connected inverters by analytical estimation of PWM ripple voltage

Ashish Kumar Sahoo, Arushi Shahani, Kaushik Basu, Ned Mohan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

15 Scopus citations

Abstract

LCL filter is becoming an attractive choice over conventional L filters for grid-connected voltage source inverters (VSI) due to smaller inductor size and better attenuation of the ripple components in the grid current. The modulation of the VSI generates switched voltages which results in distorted currents. In this paper, a simple closed form analytical expression is derived for the higher order switching components present in the inverter voltage. This is used in a systematic design procedure to design the LCL filter components for allowable grid current harmonics. A passive damping resistor is designed ensuring minimum power loss. The design is validated by simulations in MATLAB/Simulink and experiments on a laboratory prototype.

Original languageEnglish (US)
Title of host publicationAPEC 2014 - 29th Annual IEEE Applied Power Electronics Conference and Exposition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1281-1286
Number of pages6
ISBN (Print)9781479923250
DOIs
StatePublished - 2014
Event29th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2014 - Fort Worth, TX, United States
Duration: Mar 16 2014Mar 20 2014

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Other

Other29th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2014
CountryUnited States
CityFort Worth, TX
Period3/16/143/20/14

Keywords

  • Passive input filter
  • Space vector pulse-width modulation (SVPWM)
  • Total harmonic distortion (THD)
  • Voltage source inverter (VSI)

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