Research On Test Platform Of DFIGS On Grid In The Wind Power System

Alone with the widely use of the DFIG in the wind power system,research on the structure characteristics and principles of its own in order to analysis of its impact on the power grid is becoming more and more valuable.Due to wind turbine factory inspection only for single components does not have the overall macro,coupled with the real grid environment is complicated and the operation is difficult,and the power grid and its relevant qualifications identified needs a large amount of data,so to build a simulation test platform is more and more has the practical application value.Firstly,this paper introduces the theory of wind energy and the operation principle and the related theoretical characteristics of the double fed wind turbine,and builds the mathematical model of the wind turbine system,the output torque and speed of the wind turbine with different wind speeds are calculated by simulation.Secondly,this paper analyzes the traditional doubly fed wind turbine test,and designs the suitable test platform of the DFIG.Then,the feasibility of using the variable frequency speed regulation system to simulate the real condition of the wind wheel drive is illustrated by simulation.The main research contents of this paper are as follows:(1)introduced the double fed wind turbine(including structure and operation principle)and its related theoretical characteristics,and builds a mathematical model of wind energy,the output torque and speed of the wind turbine with different wind speeds are calculated by simulation.(2)introduced the traditional wind power plant inspection and wind field test,the use of variable frequency speed control system to simulate the real situation of the wind wheel input,design a 2.5MW double fed wind turbine test platform program.(3)the simulation experiment shows that the test platform based on the traction motor can simulate the grid connected test of dfig.(4)According to the test platform for the third chapter set out,carrying the test platform of 2.5MW doubly fed wind turbine,through experimental simulation related characteristics before and after the grid connected doubly fed generator,experimental demonstration of the theory test platform scheme.