The Research On Control Strategy Of SMES Suppression Wind Power Integrated System Oscillation

With the increasing importance of wind power in the power system,the stability of the grid is becoming more and more important.However,due to the uncertainty of the wind turbine output power,the power system will often lead to power oscillations,serious will cause the power system to solve,resulting in a huge loss of national economy.While the superconducting magnetic energy storage device as a reactive power compensation device is rapid and sensitive,and can effectively control the power oscillation in the affordable range,in a certain extent improve the stability of wind power integrated system.Superconducting magnetic energy storage system is closely related to the ability of the system to compensate the active and reactive power,and how to control it is a very important research topic.In the first part,the paper analyzes the influence of the wind turbine on the total damping of the power grid.On the basis of the negative damping mechanism,the damping control is the goal,and the theoretical basis of the research is made.In the second part,the working principle of the superconducting magnetic energy storage device is described,and the mathematical model is established.Considering the limitation of application in practical grid connected system,the improved model is established and the simulation analysis is carried out.The third part,starting from the angle of energy dissipation,the equivalent model of superconducting magnetic energy storage device is analyzed,according to the first part of the study theory,study the relation between equivalent parameters and damping of the superconducting magnetic energy storage device,through theoretical derivation,the control of superconducting magnetic energy storage device power compensation system inside and outside the ring the control strategy is established and simulation analysis.The fourth part,the system model is built to access the superconducting magnetic energy storage device in MATLAB Simulink software kit,using the newly established access damping control strategy and traditional control strategy were analyzed by the simulation of the control method for superconducting magnetic energy storage device,the results show that the proposed control strategy than the traditional control strategy in response time the sensitivity and more by the advantage,so as to prove the scientific research to a certain extent.