Study On The Frequency Emergency Control Of Synchronization Of Large Scale Wind Power In Xilinguole

With the development of wind power technology and people’s increasing emphasis on environmental protection, the development of new energy technology is the trend of history, and the randomness and output’s uncertainty of wind powern is a challenge to the frequency stability of system. With the installed capacity of wind power is increasing, it brings more and more influence to the stability of the whole system. Research of the frequency emergency control scheme when the wind power units are connected to the grid can not only bring benefits to the stable operation of the power system, and can eliminate the potential threat of wind farm integration. Xilinguole region has rich wind resources, and it can represent the large-scale wind power connected into grid. The research of frequency emergency control can provide an important theoretical basis for the grid operation of wind farm connected to it, also has actual significance.At first, the thesis analyses the model of wind speed and wind turbine aerodynamic system, simulates 200 hours of wind speed in Xilinguole area using Weibull distribution function, and gets the wind speed simulation graph with the help of MATLAB. Then it studys the working principle of most commonly used three kinds of wind turbines, that is fixed speed wind turbine, variable speed doubly fed wind turbine and direct drive permanent magnet wind turbine, makes analysis of the wind turbine’s inertial response characteristics, and makes a further research about the wind turbine’s “hidden inertia”impact on system’s frequencies when wind power and thermal power’s connected to the grid together. The thesis builts its model in Xilinguole, analysises the impact on security when different percentage wind power is connected to system. High frequency cutting machines scheme and the principle of high frequency protection of wind turbines in Xilinguole is studied. Finally, the thesis studys the principle of load shedding scheme of low frequency in Xilinguole area when different percentage wind power is connected to the system. The simulation results show that, when the wind power’s system proportion is 20%, 30%, 40%, 50% in Xilinguole area, the low frequency load shedding scheme of this area is not locked, proved the validity and feasibility of the proposed scheme.