Reactive Power Control Method for Grid-Tie Inverters Using Current Measurement of DG Output

  • Jihui Hwang
  • Seongil Lim
  • Myeonsong Choi
  • Myongsoo KimEmail author
Original Article


The penetration ratio of distributed generation (DG) has increased due to the depletion of fossil fuels and the impacts of global warming. Thus, overvoltage at the point of common coupling may occur since reverse current flows with the installment of DG. To solve this problem, this paper presents a reactive power control method based on the measured current at the point of common coupling of DG. The purpose of this paper is not to provide methods to improve the voltage profiles of distribution lines through the reactive power control, but to maintain the voltage after the DG connection as before the connection. By applying the proposed method in this paper, it is possible to significantly improve the penetration ratio of DG by restricting the voltage rise. Case studies, using MATLAB simulation, are performed to verify the feasibility of the new reactive power control method.


Distribution system operation Voltage control Distributed generation 



This work was supported by “Human Resources Program in Energy Technology” of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource by the Ministry of Trade, Industry and Energy, Republic of Korea. (No. 20174030201790)


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Copyright information

© The Korean Institute of Electrical Engineers 2019

Authors and Affiliations

  • Jihui Hwang
    • 1
  • Seongil Lim
    • 1
  • Myeonsong Choi
    • 2
  • Myongsoo Kim
    • 3
    Email author
  1. 1.Department of Electrical EngineeringKyungnam UniversityChangwonSouth Korea
  2. 2.Department of Electrical EngineeringMyongji UniversityYonginSouth Korea
  3. 3.Digital Solution LabKEPCO Research InstituteDaejeonSouth Korea

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