Impact of Synchronization Phase Dynamics on DQ Impedance Measurement

Hong Gong, Dongsheng Yang, Xiongfei Wang

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

6 Citations (Scopus)
97 Downloads (Pure)

Abstract

Small-signal stability assessment of the three-phase system can be performed using the measured impedances of the load and source. To obtain the dc steady-state operation point, the impedances are measured in the rotating dq-frame, and the phase angle is needed for the coordinate transformation used in both the perturbation injection and the impedance calculation. However, the phase estimation may introduce additional dynamics, affecting the accuracy of impedance measurement. This paper investigates the impact of phase synchronization dynamics on the measured impedance results. It is revealed that the phase variations in the perturbation injection has little effect on the measured impedance, while the phase dynamics introduced in the impedance calculation may have a significant impact. Based on impedance transformation, a new impedance calculation method is proposed, which can reduce the errors caused by the phase dynamics. Finally, the simulation and experiment results verify the accuracy of the analytical results and the effectiveness of the proposed method.
Original languageEnglish
Title of host publication2018 IEEE 19th Workshop on Control and Modeling for Power Electronics, COMPEL 2018
Number of pages7
PublisherIEEE Press
Publication dateJun 2018
Pages1-7
Article number8458487
ISBN (Print)978-1-5386-5542-9
ISBN (Electronic)978-1-5386-5541-2
DOIs
Publication statusPublished - Jun 2018
Event19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018 - Padova, Italy
Duration: 25 Jun 201828 Jun 2018

Conference

Conference19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018
CountryItaly
CityPadova
Period25/06/201828/06/2018
SeriesIEEE Workshop on Control and Modeling for Power Electronics (COMPEL)
ISSN1093-5142

Keywords

  • dq-frame
  • impedance measurement
  • impedance transformation
  • Small-signal model
  • synchronization phase

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  • Cite this

    Gong, H., Yang, D., & Wang, X. (2018). Impact of Synchronization Phase Dynamics on DQ Impedance Measurement. In 2018 IEEE 19th Workshop on Control and Modeling for Power Electronics, COMPEL 2018 (pp. 1-7). [8458487] IEEE Press. IEEE Workshop on Control and Modeling for Power Electronics (COMPEL) https://doi.org/10.1109/COMPEL.2018.8458487