Study on wind-turbine generator system sizing considering voltage regulation and overcurrent relay coordination

Hee Jin Lee, Gumtae Son, Jung Wook Park

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


When the wind-turbine generator system (WTGS) is connected to a radial distribution system, it can improve reliability of system by achieving the appropriate voltage regulation via its suitable control action. In this case, protective relay coordination and voltage stability issues become important factors in determining the optimal size of the WTGS, and moreover in evaluating its maximum capacity. In this paper, the proposed algorithm for selecting the optimal size of WTGS is applied based on a power flow analysis by treating the WTGS as a regulated voltage source, which is added to the related utility substation. Also, it considers the coordination time interval (CTI) of existing relays to maintain their present settings, and therefore provides an efficient solution in power system restructuring process by connecting the WTGS with its optimal size. The case study is carried out to verify that the proposed method can effectively determine the optimal size of WTGS under tightly constrained conditions resulting from voltage regulation and required protective relay coordination problems.

Original languageEnglish
Article number5659910
Pages (from-to)1283-1293
Number of pages11
JournalIEEE Transactions on Power Systems
Issue number3
Publication statusPublished - 2011 Aug

Bibliographical note

Funding Information:
Manuscript received January 17, 2010; revised May 18, 2010 and September 05, 2010; accepted October 24, 2010. Date of publication December 10, 2010; date of current version July 22, 2011. This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2010-8-1796). Paper no. TPWRS-00034-2010.

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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