Wind Energy Resource Analysis And Electrical System Design Of 50MW Wind Farm In Nuomuhong Area,Qinghai Province

With the continuous development of fossil energy,the available fossil energy is becoming less and less.At the same time,the excessive use of fossil energy leads to more and more serious environmental problems.Therefore,only by actively exploring renewable ener gy can improve energy utilization efficiency and reduce pollution to the ecological environment.Wind energy belongs to clean energy,and the exploitation and utilization of these resources accords with the concept of sustainable development and will not pollute the ecological environment.As an important green renewable energy,using wind energy instead of traditional fossil energy to generate electricity can not only reduce the use of fossil energy,but also achieve the goal of sustainable development and the national strategy of "peak carbon dioxide emissions-carbon neutrality".In recent years,as wind power generation can also meet the development needs of some enterprises with high energy consumption,China attaches great importance to the utilization of wind energy,including the research and development of core technologies of wind turbines and the construction of wind farms,selecting suitable sites to build wind farms through field exploration,and using wind turbines to collect local wind energy resources for power generation.Nuomuhong in Haixi,Qinghai is rich in wind energy resources,whic h is suitable for wind power generation.In this thesis,the Nuomuhong 50 MW wind farm is taken as the research object,and the wind energy resources in Nuomuhong area of Qinghai are analyzed.On this basis,the electrical system of the wind farm is designe d.Firstly,this thesis calculates the air density,wind shear index,turbulence intensity,average wind speed,average wind power density and the maximum wind speed once in 50 years of the wind farm by using the data of Nomuhong anemometer tower and Nomuh ong meteorological station,and comprehensively evaluates the wind resources according to these wind energy data.Then,based on the basic conclusion of wind resources,according to the characteristics of different wind turbines,the wind turbines are selected,combined with the existing wind farms,the wind turbines are optimized and the annual power generation is estimated.Secondly,according to the basic conclusion of wind turbine type selection and annual power generation,the primary electrical system of wind farm is designed,including the design of main electrical wiring scheme,calculation of short-circuit current,calculation and selection of transformers,GIS,voltage transformers,reactive power compensation devices and other equipment,overvolta ge protection and grounding,and arrangement of electrical equipment.Finally,the electrical secondary system of wind farm is designed,including wind farm monitoring system,substation monitoring system and power supply system,and the corresponding rela y protection and electrical secondary equipment are arranged.