Research And Application On Key Technology Of Wind Turbine System Analysis

There has plenty of wind energy in china, the industry of Wind Turbine is devel-oped very rapidly, and the manufacturing capacity of wind generator equipment must be improved. However, there has very difference between china and the word that the technology of system design and the manufacturing capacity of key parts, furthermore, the research on system design technology to Wind Turbine is very weakness, which is the bottleneck to restrict the home production of Wind Turbine equipment. This research gained the support from the intensive scientific and technological item of ChongQing city. The item's name is "The Key Technology of System Design for Wind Turbine". This paper has deeply researched the key technology of Wind Turbine system analysis, the primary content is:①Based on the study on the typical styles of Wind Turbine drive system design, the qualitative evaluating indicators to Wind Turbine transmission system were put forword, which include the system design, service and maintenance, quality and size, installation and cost, combined with the quantitative analysis result of Non-linear model of transmission, formed the evaluation system to the structure of Wind Turbine trans-mission system.②The aerodynamic theories are in common use to the modeling and analysis of Wind Turbines, the usual methods used is bladed element theory (BEM theory), which cannot take the time lag into consideration caused by the air quality. Aiming at the shortcoming of BEM theory, the theories applied to the aerodynamics of helicopter (called GDW theory), which is modified based on the rotor characteristics after studying the difference between the wind rotor and helicopter rotor. Sequentially, the GDW theory is introduced to calculate the rotor aerodynamics. The calculation methods for rotor aerodynamics are put forward based on the GDW theory.③The analyzed model for Wind Turbine aerodynamics are set up based on the GDW theory, in the meantime, the combine simulation technology is applied on struc-tural dynamics of Wind Turbine, which can take the coupling into consideration, and the method take the coupling relation between the rotor structure transmutation by ADMAS and aerodynamic load by MATLAB, sequentially, the combined simulation model is established on structural dynamics of Wind Turbine. The result shows that the simula-tion is more close to the work condition, and which can improve the precision of calcu- lation.④The combine simulation technology is applied on system performance simula-tion of 600kW Wind Turbine, which based on the combined simulation model of Wind Turbine. Aiming at the wind standard that defined by the IEC regulation, the perform-ance analysis was actualized to 600kW Wind Turbine, at the same time, the analytic re-sults are compared to the results calculated by GH Bladed. The comparison shows that the results are very contiguous, which validated the correctness of the combine simula-tion model of Wind Turbine. The analytic technique takes the coupling relation into consideration, so the simulation is more close to the work condition of the Wind Tur-bine.⑤Aiming at the tendency of Wind Turbine toward the large power, high efficiency and reliability direction at present, a new-style drive train for Wind Turbines with large capacity is proposed that based on the a planetary transmission system. In the process of modeling and analysis to this transmission system, the dynamic simulation has made that utilizes the software platform of ADAMS and MATLAB/SIMULINK, and per-formance analysis is put up to the drive control system. The new-style drive train sys-tem uses the adjustable torque converter of the reactor blade which is fixed to the servo generator, which has the characteristic of rapidness to response speed, highness to pre-cision and smallness to adjusted quantum. The purpose for variable speed input and constant speed output is realized by controlling the rotation angle of ball screw of the adjusting mechanism of the reactor blade which is fixed to servo generator; conse-quently, the concussion is reduced to the power line.⑥The characteristic and demand of structure analysis were bring forward for key components of Wind Turbine, according to a Wind Turbine needs of manufacturing en-terprises, the structural strength and analysis has made to principal axis and wheel hub of MW Wind Turbine, in the establishment of the spindle and wheel contact strength on the basis of analysis model, with the main focus of the wheel stud connected parts of the connection strength for analysis.On this basis, the structure of the principal axis and wheel hub was optimized, which realized the purpose of weight reduction and cost re-duction.