Analysis Of The Influence Of Changtu Dawa Wind Farm On Voltage Reactive Power Of Tieling Power Grid

Traditional power generation methods consume a lot of petrochemical energy,which not only causes the shortage of non-renewable energy,but also pollutes the environment.Because of its inexhaustible advantages and non-pollution,new energy technologies are vigorously developed worldwide.However,with the input and construction of large-scale wind power in urban power grid in Northeast China,the randomness,intermittence and uncertainty of wind power make wind power to power grid.The impact has become obvious,mainly reflected in the impact of wind farms on reactive power and voltage at grid-connected points,resulting in Regional Grid Reactive Power imbalance,voltage instability,and adverse impact on human production and life.Therefore,it is of great practical significance to study the impact of wind power integration on the stability of regional power grid system.Taking Dawa wind power Grid-connected project as an example,this paper analyses the impact of large-scale wind farms on the stability of regional power grid after they are connected to the grid.According to the research results,it provides technical support for whether the grid-connected operation of similar wind farms has an impact on the security and stability(1)According to the scale of Dawa wind power Grid-connected project and the special requirements of regional power grid for wind power grid-connected,the corresponding equipment types and sizes are selected.At the same time,the electrical main wiring diagram of booster station and the scheme of wind power project absorption in regional power grid are given.(2)By calculating the reactive power loss after the Dawa wind farm is connected to the grid,it is determined that the Dawa wind farm will not be equipped with static reactive power compensation device after it is connected to the local system.(3)Calculate the power flow of Dawa wind power under the normal mode of large and small loads in winter before and after its commissioning,and provide the basis for the power factor of wind power units in this project.(4)The objective model of reactive power optimization capacity calculation of three wind farms with minimum reactive power compensation capacity,voltage quality and total network active power loss is established.The improved artificial fish swarm algorithm is used to optimize the objective model.It is concluded that 10 Mvar dynamic reactive power compensation device needs to be installed in grid-connected wind farms.