The responses of an inverter-based distributed generator (IBDG) to abnormal voltage and frequency are different from those of a conventional generator because of the inverter's operating modes. In particular, although the momentary cessation (MC) mode is essential to protecting the distribution system, the MC mode can affect the power system transient stability by temporarily ceasing significant amounts of IBDG generation. To mitigate these negative effects, this study analyzed the impacts of MC capability on the power system transient stability. First, the transient stability was analyzed in relation to MC capability using the single-machine equivalent (SIME) method. A critical MC operating point (CMCOP) was then proposed to assess the severity of a transient impact and to secure the transient stability under the contingency conditions. A case study based on the Korean power system validated the feasibility and effectiveness of the proposed method.
Bibliographical noteFunding Information:
Manuscript received May 8, 2019; revised July 15, 2019 and August 13, 2019; accepted September 14, 2019. Date of publication September 19, 2019; date of current version February 26, 2020. This work was supported in part by the Korea Electric Power Corporation under Grant R17XA05-4 and in part by the Human Resource Program in energy technology of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), with financial resources from the Ministry of Trade, Industry, and Energy, Republic of Korea under Grant 20174030201820. Paper no. TPWRS-00636-2019. (Corresponding author: Byongjun Lee.) H. Shin, J. Jung, and B. Lee are with the Department of Electrical Engineering and Electronics, Korea University, Seongbuk-gu 02841, South Korea (e-mail: firstname.lastname@example.org; email@example.com; firstname.lastname@example.org).
© 1969-2012 IEEE.
All Science Journal Classification (ASJC) codes
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering