Differential and Common Mode Active Resonance Damping Control for Shunt-less LCL Filter Based Grid-Connected PV Inverters

Ahmad Khan, Silvanus Drsilva, Mohsen Hosseinzadehtaher, Mohammad B. Shadmand, Haitham Abu-Rub

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

1 Citation (Scopus)

Abstract

This paper presents a generalized Differential Mode (DM) and Common Mode (CM) active resonance damping control scheme for grid-connected Photovoltaic (PV) inverters that are based on a shunt-less LCL filter. The proposed technique is useful for applications where the utility grid is weak. This is because weak grid's large stray inductance challenges the DM control stability. Likewise, it will be indicated in this work that weak grid's improperly designed ground resistance influences the CM control stability. Thereby, this paper develops an active resonance damping scheme for both the DM and CM controls. The developed scheme requires sensing the filter capacitors' DM and CM currents. Then, these supplementary parameters are fed-back in their respective control loop with a proportional gain. This scheme emulates a virtual damping resistor in-parallel with the filter capacitors in each control mode. The stability achievement of the modified control system is examined using Pole-Zero plots. Also, the theoretical analyses are confirmed on a 10 kW PV system that is synchronized with a 240V RMS /50Hz weak grid.

Original languageEnglish
Title of host publication2019 IEEE Power and Energy Conference at Illinois, PECI 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728102948
DOIs
Publication statusPublished - 24 Apr 2019
Event2019 IEEE Power and Energy Conference at Illinois, PECI 2019 - Champaign, United States
Duration: 28 Feb 20191 Mar 2019

Publication series

Name2019 IEEE Power and Energy Conference at Illinois, PECI 2019

Conference

Conference2019 IEEE Power and Energy Conference at Illinois, PECI 2019
CountryUnited States
CityChampaign
Period28/2/191/3/19

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Keywords

  • Active resonance damping
  • Common Mode (CM)
  • Differential Mode (DM)
  • Leakage current
  • Non-isolated
  • PV Farm
  • Shunt-less LCL filter
  • Transformer-less
  • Z-H inverter

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology

Cite this

Khan, A., Drsilva, S., Hosseinzadehtaher, M., Shadmand, M. B., & Abu-Rub, H. (2019). Differential and Common Mode Active Resonance Damping Control for Shunt-less LCL Filter Based Grid-Connected PV Inverters. In 2019 IEEE Power and Energy Conference at Illinois, PECI 2019 [8698929] (2019 IEEE Power and Energy Conference at Illinois, PECI 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PECI.2019.8698929