A feasibility and dynamic performance analysis of hydromechanical hybrid power transmission technology for wind turbines

[摘要] A multi-body dynamical model of a wind turbine power generation system (WTPGS) based on hydromechanical hybrid powertransmission (HMHPT) technology is developed and simulated to overcome theindividual drawbacks of the gear train and hydrostatic powertransmission (HPT) system. The HMHPT is a hybrid concept of a single-stageplanetary gear train (SSPGT) and a typical HPT. The input shaft of the SSPGT is coupled with the turbine rotor, whereas the output shaft of the SSPGT is coupled with the shaft of a hydraulic pump. The hydraulic pump supplies flowto the hydro-motor, and its shaft is coupled with the generator. An existingturbine blade model of 750 kW based wind turbine is used for furtherdevelopment and analysis of the HMHPT. The simulation responses indicatethat the power generation and the control potential both have beenimproved using the HMHPT in a wind turbine. Moreover, the influence onthe motor power generation due to variations of pump and motor leakages isaddressed. Additionally, it is found that if the order of the SSPGT and theHPT are swapped in the proposed HMHPT, then the settling time, maximumovershoot, and rise time of the system responses are increased. As a result,the controllability of the system is decreased.

[学科分类] 社会科学、人文和艺术（综合）