Wind Power Modeling And Analysis Of Voltage Fluctuation Detection

Wind power technology has been rapidly developed in recent years. With its good operation performance, the doubly-fed VSCF wind power generation systems have become the mainstream model. With a growing number of wind turbine operating with network, accompanied by the even more prominent effect on power quality caused by wind power. Power quality problem will become a major constraining factor in wind farm capacity. As a result, studies on power quality caused by wind farm operating with the power system have important practical significance.This paper addresses on the doubly-fed VSCF wind power system and the voltage fluctuation caused by it. Main work is as followed. First, this paper studies the doubly-fed VSCF wind power system operating characteristics and control strategies, including pitch strategy and DFIG vector control strategies. Then it build a complete dynamic simulation model, including the PWM converter models, aerodynamic system, shaft model, DFIG and its control systems, and also conducted a simulation. Then, it analyzes the main impacting factors on voltage fluctuation of the wind turbine based on the simulation models. Finally, it studies the detection method of voltage fluctuation of the wind power.The dynamic model of Doubly-fed VSCF wind power system is build in this paper which is based on MATLAB/Simulink. The simulation results revealed that vector control strategy can achieve the decoupling control of output active power and reactive power. By the simulation of combination wind speed model and wind speed model considering the effect of tower shadow and wind shear respectively, we can gert the conclusion that the wind speed considering the effect of tower shadow and wind shear will cause larger voltage fluctuations.