Study on Soft Phase Locked Method to Solving the Synchronization Problem of Active Power Filter in Stand-alone Power Grid

Fang Zhuo, Longhui Wu, Zhe Chen, Xianwei Wang, Zhaoan Wang

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

3 Citations (Scopus)
138 Downloads (Pure)

Abstract

Traditional LC filters can't work stably in small rating stand-alone power grid. So active power filter (APF) is becoming an important tool to solve the power quality problem in small rating stand-alone power grid. In most current detection algorithm of APF, it needs a synchronizing signal. Firstly, the influence of the synchronizing signal error on current detection of APF is analyzed in this paper. Voltage distortion, voltage unbalance and frequency fluctuation are frequent and severe in small rating stand-alone power grids, so traditional synchronizing signal obtaining method--phase locking based on zero-cross detection can't work effectively in small rating stand-alone power grid. Then a soft phase locked loop with additional filter is proposed. It can lock the phase angle on to the positive sequence of fundamental voltage accurately and rapidly. It ensures the performance of APF applied in the small rating stand-alone power grid. Moreover, the soft phase locked loop is easy to be implemented in a Digital Signal Processor (DSP). Simulation and experimental results validate that the soft phase locked loop has satisfactory performance.
Original languageEnglish
Title of host publicationProceedings of the 6th International Power Electronics and Motion Control Conference (IPEMC)
PublisherIEEE
Publication date2009
Pages1168-1174
ISBN (Print)987-1-4244-3557-9
DOIs
Publication statusPublished - 2009
EventInternational Power Electronics and Motion Control Conference (IPEMC) - Wuhan, China
Duration: 17 May 200920 May 2009
Conference number: 6

Conference

ConferenceInternational Power Electronics and Motion Control Conference (IPEMC)
Number6
Country/TerritoryChina
CityWuhan
Period17/05/200920/05/2009

Keywords

  • Small rating stand-alone power grid
  • Active power filter
  • Soft phase locked loop

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