Study on Transient Improvement through Governor Control under Asynchronous Transition of CTTS

CTTS의 비동기 절체 시 조속기 제어를 통한 과도 개선에 관한 연구

Kang, Byoung-Wook;Chai, Hui-Seok;Han, Woon-Ki;Lim, Hyun-Sung;Kwon, Seung-Ok;Kim, Jae-Chul

  • Received : 2015.07.10
  • Accepted : 2015.10.20
  • Published : 2015.11.30


This paper derives the problems that occur when asynchronous transfer in case of phase, frequency, voltage between the emergency generator and the grid and proposed the countermeasure to solve this problem when the transfer switch replace ATS(Automatic Transfer Switch) with CTTS(Closed Transition Transfer Switch) for the non-interrupting switching. In order to simulate above cases, modelling was used the transient analysis program PSCAD/EMTDC. By using this, the customer installed emergency generator and the grid was implemented. We compared three cases of asynchronous transition based on the basic case and proposed improvement by controlling the governor of emergency generator.


Emergency generator;Asynchronous transition;Governor control;Automatic Voltage Regulator


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Supported by : 숭실대학교, 한국에너지기술평가원