Use of Series Negative Impedance to Cancel the Effect of Equivalent Grid Impedance on the GridConnected Inverter Stability in the DPGS

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)Not applicablepeer-review

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Author(s)

Detail(s)

Original languageEnglish
Title of host publication2018 IEEE Applied Power Electronics Conference and Exposition (APEC)
PublisherIEEE
Pages2368-2373
ISBN (Electronic)9781538611807
Publication statusPublished - Mar 2018

Publication series

NameAnnual IEEE Conference Applied Power Electronics Conference and Exposition (APEC)
PublisherIEEE
ISSN (Electronic)2470-6647

Conference

Title33rd Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2018)
LocationHenry B. Gonzalez Convention Center
PlaceUnited States
CitySan Antonio
Period4 - 8 March 2018

Abstract

An active grid impedance cancellator is proposed to suppress the effect of the grid disturbance and stabilize the distributed power generation (DPG) grid-connected inverters operating under the weak grid. Harmonic interaction between the DPG inverter and the grid is thereby avoided owing to the cancellation of equivalent grid impedance. The impedance cancellator composed of a full-bridge dc-ac converter without passive filtering elements is connected in series at the inverter output to simulate a negative virtual grid impedance. In addition, an active damping function is integrated to suppress the filter resonance of the inverter. In the paper, the system configuration and the control strategy of the impedance cancellator are introduced. The power consumption of the cancellator is also evaluated. A single-phase grid-connected inverter prototype has been built to verify the effectiveness of the proposed method. The experimental results show a good agreement with the theoretical knowledge.

Research Area(s)

  • Active damping, Grid impedance cancellator, Inverter, LCL filter

Citation Format(s)

Use of Series Negative Impedance to Cancel the Effect of Equivalent Grid Impedance on the GridConnected Inverter Stability in the DPGS. / He, Yuanbin; Lai, Chun-tak; Chung, Shu-hung; Zhang, Xin; Wu, Weimin.

2018 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2018. p. 2368-2373 (Annual IEEE Conference Applied Power Electronics Conference and Exposition (APEC)).

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)Not applicablepeer-review