Research On The Impact Of Large-scale Wind Power Integration On Shanxi Power System

As an important use pattern,wind power generation is most mature and largest scale development.Because of development of wind power technology,each single wind farm with large size,wind power in power grid and the proportion of also gradually to increase.Shanxi Province is rich in wind resources and has dense reasonable layout of large-scale wind farms in the northern region,the large-scale wind farm changes load flow of power grid.The randomicity and intermittence of wind will lead to instability output power in wind turbine generator,the fluctuating of wind farm power output would produce the certain influence to voltage quality of power network.Aiming at the problem of analysis of security and stability of power system integrated with large capacity wind farms,the complete mathematical model was established in this dissertation and by large quantities of simulated calculations and theoretical analyses of a real grid,gets wind of Shanxi power grid after change trend of the distribution and reactive power balance analysis.Firstly,the development and present situation of wind power at home and abroad is discussed,the characteristics and types of wind power is described,and some technical issues of the integrated wind farm are analyzed.Research on voltage stability problems of grid-connected wind farm is presented,and the main contents are as follow,first,the structure and working mechanism of induction generator(IG)and doubly-fed induction generator(DFIG)is analyzed.Then,we discussed the impact of frequency and voltage when wind connected to main grid.Finally,Combining Shan Xi Power grid,the angle stability and voltage stability of power system with large capacity wind farms were analyzed.in a stable operating condition,the influence of large-scale wind power access to system is different,wind power centralized access areas has a larger effect on wind power access point voltage level and the wind voltage levels meet the operation requirements.wind power system in some areas has certain improving effects on the safety and stable operation of power grids.