Research On Control Of Simulation System Of 10kW VSCF Wind Power Generator

As we all known, wind power is of great significance to solve the energy crisis. However, the research of actual wind power generation system in Yunnan province has many shortcomings, such as the complex and unstable objective weather conditions, the large expensive and complex structure, many core components and technologies dependent on imports, which makes it important to study in the laboratory.For the above problems, this paper studies the theory of doubly fed wind power system, building a digital simulation and a dynamic physical simulation of wind power system, and verifying its performance based on the engineering project of Electric Power Research Institute of Yunnan Power Grid Co "10kW simulation of wind power system construction and research".This paper introduces the common wind power generation technology and its simulation experimental platform. The mechanism of wind turbine capturing the maximum wind energy and VSCF doubly fed wind power generator’s operating are analyzed. Establishing the mathematical model of wind speed, wind turbine, the static and dynamic state of doubly fed generator, two-level voltage type of PWM converter. What’s more, the power flowing and controlling objectives of wind power generation system are analyzed. The controlling strategies of grid-connection without load, power external loop and current inner loop under stator voltage orientation to realize maximum power point tracking, optimal power compensation for reactive power controlling are pulled. The grid side converter taking grid voltage oriented vector control strategy.In this paper, the digital simulation experiment platform of lOkW Doubly fed wind power generation has been set up by@Simulink. Studying on the characteristics of wind turbine, wind power generation power decoupling, maximum power tracking under step and natural wind speed, optimal power compensation for reactive power controlling. The result shows that this system can be carried out for the experiment of maximum power point tracking and the variable speed constant frequency, fast and accurately, by using the proposed control strategy.To further study the actual wind power generation system, building a physical dynamic simulation experiment platform on the lOkW full-open and monitoring-able experiment platform for DFIG wind power generation base on NI compact RIO core controller and LabVIEW soft. What studied in the digital simulation and no-load grid connection under different speed are studied in this platform. The results verify the effectiveness and accuracy of the physical dynamic simulation platform, and different wind speed has different effects for no-load grid connection that is no effect in digital simulation.