Flexible Frequency Operation Strategy of Power System With High Renewable Penetration

Jaewan Suh, Dong Hee Yoon, Yoon Sung Cho, Gilsoo Jang

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


Growth of renewable penetration will increase the requirement for flexible resources. It may be a simple solution to build more flexible resources, but it is too expensive. Recently, the new construction of power plant or transmission line has faced opposition by the resistance of the local residents. Depending on the needs, new methodologies are required in order to gain the flexibility of the power grids. This paper proposes the flexible frequency operation strategy with significant renewable penetration to achieve the flexibility of the power grids. Flexible frequency operation provides customized frequency through BTB HVDC, and the overall system is operated with relaxed frequency regulation. By reducing the need and role of the frequency ancillary service reserve, an operator does not need to secure additional governor response reserve for renewable energy. In order to model frequency dynamic of high renewable penetrated power system, the swing equation is modified in this paper. The case studies using MATLAB show effectiveness of flexible frequency operation strategy.

Original languageEnglish
Article number7511758
Pages (from-to)192-199
Number of pages8
JournalIEEE Transactions on Sustainable Energy
Issue number1
Publication statusPublished - 2017 Jan


  • AC-DC power conversion
  • frequency control
  • governor response
  • renewable energy

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment


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