Control Method of Single-phase Inverter Based Grounding System in Distribution Networks

Wen Wang, L. Yan, X. Zeng, Xin Zhao, Baoze Wei, Josep M. Guerrero

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

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Abstract

The asymmetry of the inherent distributed capacitances causes the rise of neutral-to-ground voltage in ungrounded system or high resistance grounded system. Overvoltage may occur in resonant grounded system if Petersen coil is resonant with the distributed capacitances. Thus, the restraint of neutral-to-ground voltage is critical for the safety of distribution networks. An active grounding system based on single-phase inverter is proposed to achieve this objective. Relationship between output current of the system and neutral-to-ground voltage is derived to explain the principle of neutral-to-ground voltage compensation. Then, a current control method consisting of proportional resonant (PR) and proportional integral (PI) with capacitive current feedback is then proposed to guarantee sufficient output current accuracy and stability margin subjecting to large range of load change. The performance of the control method is presented in detail. Experimental results prove the effectiveness and novelty of the proposed grounding system and control method.
Original languageEnglish
Title of host publicationProceedings of 8th IEEE Energy Conversion Congress and Exposition (ECCE), 2016
Number of pages6
PublisherIEEE Press
Publication dateSept 2016
ISBN (Electronic)978-1-5090-0737-0
DOIs
Publication statusPublished - Sept 2016
Event 8th Annual IEEE Energy Conversion Congress & Exposition: ECCE 2016 - Milwaukee, WI, United States
Duration: 18 Sept 201622 Sept 2016
http://www.ieee-ecce.org/

Conference

Conference 8th Annual IEEE Energy Conversion Congress & Exposition
Country/TerritoryUnited States
CityMilwaukee, WI
Period18/09/201622/09/2016
SponsorIEEE, IEEE Industry Applications Society (IAS), IEEE Power Electronics and Industry Applications Societies (PELS)
Internet address

Keywords

  • Grounding method
  • Neutral-to-ground voltage
  • Inverter
  • Current detection
  • Current control method

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