Suppositional Design Of An Intelligence Hydraulic System For MW Wind Turbine Generator' Yawing System

Since the last several years of 1970's, with the fact that all of the countries in the world paying close attention to these problems, such as environmental protection , energy shortage and energy conservation increasingly, new sources of energy generating electricity, the technology is more and more regarded highly by people. The wind energy source, as one kind of new model with no the regenerative energy contaminating, is favoured accepted by governments of all countries in the world gradually. The technology of generating electric power by force of wind has got comparatively broad and prompt development in the world, aerogenerator has developed gradually to large-scale-rization and being commercialized, too. According as Kyoto protocol putting into effect, wind power generates electricity in the days to come would have more than using traditional fossil fuel to generate electricity competition.The system of yaw and variable pitch is the most important components of wind power generating , which has an direct impact to the aircraft crew utilization ratio to the wind energy source and the complete machine function. Based on having carried out large amount of the data surveying and looking up a relevance's, backing "large-scale wind power of Lan Zhou City key scientific and technological projects aircraft crew check and monitor the feedback control device ", take 1 MW level wind power generating set as the fundamental equipment according to having set forth the large-scale wind power generating set.The development condition and trend of the technology of demostic and abroad wind power electric power generation in the present stage is analysed; The hydraulic sysytem of yaw and variable pitch is designed and optimizd, and the designs of selections type of main component is conducted, too; The interlinking applying one kind of modeling method of development system power pursues law , handleed by analysis and simplification to system, have drawn out going off-course respectively and have been changed into systematic power of pitch hydraulic pressure interlinking picture, principle has deduced system mathematic model , namely state equation according to power interlinking picture; Using the MATLAB7.1 Simulink tool case , made an simulation for the system of yaw and variable pitch; The system dynamic behaviour during the period of different parameter by the fact that the diversity varying simulates was reached, finally theoretical analysis and comparison on simulated result was carried out, too. The results of simulation proveded the forceful theory and experiment basis for the design and optimization simulating of the wind power generating set yaw and variable pitch hydraulic pressure system.