Cooperative voltage control method by power factor control of PV systems and LRT

Shoji Kawasaki*, Noriaki Kanemoto, Hisao Taoka, Junya Matsuki, Yasuhiro Hayashi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)


Recently, the number of system interconnection of the renewable energy sources (RES) such as the photovoltaic generation (PV) and wind power generation is increasing drastically, and there is in danger of changing the voltages in a distribution system by the precipitous output variation of RESs. In this study, the authors propose one voltage control method of the distribution system by the power factor control of plural PV systems in consideration of cooperation with the load ratio control transformer (LRT) of laggard control response installed beforehand in the distribution system. In the proposed method, the slow voltage variation is controlled by LRT, and the steep voltage variation uncontrollable by LRT is controlled by plural PV systems, as a result, all the node voltages are controllable within the proper limits. In order to verify the validity of the proposed method, the numerical calculations are carried out by using an analytical model of distribution system which interconnected PV systems.

Original languageEnglish
Pages (from-to)309-316
Number of pages8
JournalIEEJ Transactions on Power and Energy
Issue number4
Publication statusPublished - 2012


  • LRT
  • Photovoltaic generation system
  • Power factor control
  • Renewable energy
  • Voltage control
  • Voltage imbalance

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


Dive into the research topics of 'Cooperative voltage control method by power factor control of PV systems and LRT'. Together they form a unique fingerprint.

Cite this