Tham khảo tài liệu 'wind power impact on power system dynamic part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 162 Wind Power 100 200 300 400 500 Zeit s 600 T- T- T- T- 42 s ẽ _ 5 E E g ẫ z 5 c 3 d - Fig. 14. Time response of system variables at iterative self-adapting system management stochastic optimization deterministic response of the wind speed Control Methods for Variable Speed Wind Energy Converters 163 b flat country - -- o P_Index c_Index 2 4 3 5 6 7 . 8 control method 1 speed control 2 power control linear average value 3 power control average value by Weibull-distribution ISSM-Approach with stochastic dynamic optimization 4 5 6 7 8 b g g g g g 0 Fig. 15. Quantitative comparison of research results by means of P-index and cP-index for two characteristic locations The frequency distribution of the load collective in the mechanical drive train has been used for further evaluation of the results of the comparing examinations. It has been prepared by classification of the time response of the shaft torque. The shaft torque collective of the ISSM method shows a remarkable reduction of the load cycles with high amplitude as compared with collectives of the other control methods which implies an increase of usability and life see Fig. 16 . Fig. 16. Relative frequency distribution of the shaft torque at the examined control methods 164 Wind Power 6. References 1 Sourkounis C. 1994 1995 Windenergiekonverter mit maximaler Energieausbeute am leistungsschwachen Netz Dissertation TU Clausthal Papierflieger Clausthal-Zellerfeld 2 Sourkounis C. Bekehermes M. 2000 . Iterativ adaptierende Betriebsfuhrung fur drehzahlvariable Windenergiekonverter Atp - Automatisierungstechnische Praxis 3 Oldenbourg Verlag 3 Sourkounis C. 2004 . Drehzahlelastische Antriebe unter stochastischen Belastungen Habilitationsschrift TU Clausthal Papierflieger ISBN 3-89720-737-0 Clausthal-Zellerfeld 4 Klockner J. 1979 . Berechnung des Schwingungsverhaltens von gedampften schwach nichtlinea-ren Schwingerdaten unter Berucksichtigung der Reduktion der .
