Analysis And Detection Of Voltage Disturbances With Wind Power Grid Connection

Energy shortage and pollution have become global issues; government officials in power generate industry has attached importance to wind-generated electricity. Thus,proportion of the wind-generated power has increased in the national grid. However,transient voltage fluctuation is a problem concerned as a shortage of wind-generated power. This shortage not only influences precise instruments, but it could bring potential risks to daily electricity use. It might bring problems to national power grids,even collapse. Therefore,Monitoring and analysis of transient voltage fluctuation are one of the main elements to study regarding to integration of wind power. The thesis has focused on the analysis of the disturbance signal from the transient voltage fluctuation, and discussed the methods to monitor and identify voltage fluctuation.Firstly, the thesis has introduced the reason of transient voltage fluctuation regarding to integration of wind power. Beside, it has analyzed how did Wind speed,power change, and load could influence integration of wind power, according to simulation model. And thus, the article introduced different types of the disturbance signal from the transient voltage fluctuation. Due to the fact that grid voltage could produce noises, the optimized simulation model limited the noise by using PSO and matching pursuit methods. To be more specific, according to sparse decomposition framework, thesis used this method to increase the matching speed: analyzing the disturbance signal from the transient voltage fluctuation. Besides, the data generated from MATLAB/Simulink simulation model has proved the effectiveness of above method. It not only could increase the accuracy of disturbance signal assortment, but it achieved transient disturbance location and parametric estimates.