Research On The Influence Of Wind Power Integration On System Voltage Stability

At present,wind energy,water energy and solar energy are the main new energy,in the power system status is becoming more and more important.The wind energy storage is very large,inexhaustible,at the same time,the wind power generation technology is also the most mature,has great development value and commercial prospects,in the world energy has a very important position,more and more favored by the world,is the development of high-speed full,and gradually became the leading position of new energy.Wind power generation has a lot of advantages,but due to the increasing capacity of wind power grid,and the environmental impact of wind energy has the characteristics of uncertainty and uncontrollable,so that the wind power grid will have a greater impact on the normal operation of the system.Therefore,it is of great theoretical significance for the future development of new energy electric industry to strengthen the further study on this issue.Firstly,the classification of wind power generation system and the structure and principle of wind turbine are briefly introduced.based on this,the working principle and advantages of doubly-fed induction motor are deeply studied.then,the relevant mathematical models of each component and several different wind speed are carefully analyzed.finally,the corresponding models are built in MATLAB simulation software.then,according to the simulation analysis of the models,the influence of wind power generation on the system voltage under wind speed fluctuation and fault is analyzed according to the experimental results.Finally,the types and analysis methods of voltage stability are briefly described.wind farm is composed of many control methods and complex structure.according to different control methods corresponding to the corresponding analysis methods,combined with power flow calculation,IEEE-30 node is taken as a specific example to join the wind farm for power flow calculation,and the system voltage stability is analyzed and studied.Through simulation analysis,after the double-fed fan is connected to the grid,the system voltage has little effect,and the system voltage stability can be maintained.In the IEEE-30 node system,the cut-out of the wind field will affect the stability of the system voltage.The degree of change in stability is related to the magnitude of the wind speed and the load of the cut-out point.