As the capacity of renewable power generation facilities rapidly increases, the variability of electric power system and gas turbine power generation is also increasing. Therefore, problems may occur that require urgent repair while the gas turbine rotor is stopped. When the gas turbine rotor turning is stopped and then restarted, if the turning period is not appropriate, severe vibration may occur due to rotor bending. As a result of the experiment, it was confirmed that normal operation is possible when the gap data measured at the start of rotor turning after maintenance work is similar to the existing value. And the vibration value at the start of rotor turning was lower as the rotor temperature was lower or the stop period was shorter.

1. 서 론
2. 실험대상 및 방법
3. 결과 및 고찰
    3.1 단시간 Rotor Turning 정지 영향
    3.2 장기간 Rotor Turning 정지 영향
4. 결 론

• 유원주(한국동서발전(주)) | Won-Ju Yu (Korea East-West Power Co., Ltd.) Corresponding Author
• 이창열(한국동서발전(주)) | Chang-Yeol Lee (Korea East-West Power Co., Ltd.)