Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Analysis of shaft torsion of a DFIG for a wind farm collector system fault

풍력발전단지 집합 시스템 사고 시 DFIG의 Shaft Torsion 분석

  • Yoon, Eui-Sang (Chonbuk National University, Dept. of Electrical Engineering, WeGAT research center, Smart grid research center) ;
  • Lee, Jin-Shik (Chonbuk National University, Dept. of Electrical Engineering, WeGAT research center, Smart grid research center) ;
  • Lee, Young-Gui (Chonbuk National University, Dept. of Electrical Engineering, WeGAT research center, Smart grid research center) ;
  • Zheng, Tai-Ying (Chonbuk National University, Dept. of Electrical Engineering, WeGAT research center, Smart grid research center) ;
  • Kang, Yong-Cheol (Chonbuk National University, Dept. of Electrical Engineering, WeGAT research center, Smart grid research center)
  • 윤의상 (전북대학교 전기공학과, 풍력에너지 전력망적응기술 연구센터, 스마트그리드 연구센터) ;
  • 이진식 (전북대학교 전기공학과, 풍력에너지 전력망적응기술 연구센터, 스마트그리드 연구센터) ;
  • 이영귀 (전북대학교 전기공학과, 풍력에너지 전력망적응기술 연구센터, 스마트그리드 연구센터) ;
  • 정태영 (전북대학교 전기공학과, 풍력에너지 전력망적응기술 연구센터, 스마트그리드 연구센터) ;
  • 강용철 (전북대학교 전기공학과, 풍력에너지 전력망적응기술 연구센터, 스마트그리드 연구센터)
  • Published : 2011.07.20
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Abstract

This paper analyzes the shaft torsion of a doubly-fed induction generator (DFIG) for a wind farm collector system fault. When a fault occurs, the active power of the DFIG cannot be transmitted to the grid and thus accelerates the rotation of both the blade and the rotor. Due to the different inertia of these, the angle of deviation fluctuates and the shaft torsion is occurred. This becomes much severe when the rotational speed of the blade exceeds a threshold, which activating the pitch control to reduce the mechanical power. The torque, which can be sixty times larger than that in the steady state, may destroy the shaft. The shaft torsion phenomena are simulated using the EMTP-RV simulator. The results indicate that when a wind farm collector system fault occurs, a severe shaft torsion is occurred due to the activation of the pitch control.

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