Research On Influences Of Distributed Wind Power Integration On Reactive Power Voltage Characteristics Of 110kv Regional Grids

Wind power as a clean energy.development and utilization of large scale has been an irresistible trend,how to maximize the benefits of wind power resources scientifically and reasonably,and guarantee the security and stability of the grid,is placed in front of the grid management workers a urgent issue.This thesis will study the influence of wind power utilization the safe and stable operation ofpower grid,wind power utilization and power grid security and win-win.to provide technical support for the next few years,the rational use of wind power resources.This thesis introduces the construction of wind power generation system and the commonly used double fed induction wind generator model,analysis of the wind power generator with constant power and constant voltage because of the differences in the number of two kinds of control methods.In the power grid of Hunan Province,a 110kV area as an example,the use of power system analysis software package(PSASP)to build a simulation platform,effects of different control methods for wind power fluctuation on power grid voltage.The main contents of this thesis include:First introduced the wind farms and the impact on the power grid caused by off network;introduces the developmeint situation of Hunan Province,wind power,draw the distribution map of our province "12th Five-Year" first batch of wind power project,and the area of wind farm the quantity of statistics;Hunan is presented at the end of 2015 wind farms in Chenzhou area installed.This thesis introduces the constant speed asynchronous wind turbine,doubly fed asynchronous wind turbine,wind turbine characteristics of three types of direct drive permanent magnet synchronous wind turbine etc.;analysis of constant power and constant voltage under grid voltage stability;Chenzhou power grid in summer,summer,winter 3 kinds of typical operation mode,the fan of constant power factor and constant voltage two control mode,the voltage of the Chenzhou area access 110kV wind farm reactive characteristics;comprehensive analysis program by power system(PSASP)to build a simulation platform,revealed 110kV wind power grid voltage with the output fluctuation trend was first increased and then decreased,and the resulting in this change trend are analyzed in theory.magnet direct drive synchronous wind power generator.and the commonly used reactive power compensation devices,SVC/SVG configuration princple and control strategy.In the fan with low voltage ride through capability and fan does not have the ability of low voltage ride through two cases.analysis of the wind farm near the system part of the line three permanent fault off the network;at the same time,the Chenzhou area in summer,summer,winter and big gust disturbance of3 kinds of typical operation under the influence of gradient,wind disturbance and wind farm off network on the voltage of the power network.The research results have practical engineering significance.