Study On The Determination Of Reactive Power Compensation Devices And Control Strategy Of Kailu 500kV Wind Power Collecting Step-up Station

With the construction of domestic million kilowatt wind power base,the large-scale wind power grid is bound to happen,and the power from wind station is collected to wind power base in the booster station,then the wind power is connected to the system.Because of the wind power generation having the characteristics of randomness,volatility,intermittent,unpredictable and uncontrollable,and the wind power affected by large range of wind resources,the outstanding problem is voltage stability of wind power system,which is caused by the large scale wind power connected to power gird.In order to ensure safe and stable operation of the entire base grid,the study on the determination of reactive power compensation devices and control strategy of 500 k V wind power collecting step-up station is very necessary.In order to meet the requirements of wind power grid,combining tgo power grid and the actual situation of Kailua wind power base,firstly Kailua 500 k V stations networking scheme is determined,then the electrical part of Kailua 500 k V wind power stations is designed from the aspects of the main electrical wiring,and choice of the main electrical equipment,power distribution equipment and electrical general layout,electricity.Secondly the principle and advantages and disadvantages of all kinds of reactive power compensation device was analyzed.The reactive-power characteristic analysis of the 500 k V power station was carried out,the sub-project is focused on the determination of reactive power allocation scheme used by Kailua 500 k V wind power stations,which contains the type of dynamic reactive power compensation device,reactive power compensation capacity and ratio of reactive power compensation;then the dynamic reactive power device design scheme of Kailua 500 k V wind power stations is put forward.Finally,on the basis of the large capacity of SVG device level optimization control protection strategy,which includes unified current decoupling control and phase current correction strategy and dc voltage control strategy,the technical performance requirements ? the control strategy of dynamic reactive power compensation device and capacitor/reactor banks is put forward;then the feasibility of large capacity SVG in engineering application is verified by the simulation analysis.With the development and construction of the large domestic wind power base,the research of this paper may greatly shorten the cycle engineering design and construction,further optimize the substation design and the quality of engineering design.The reference for the domestic similar pooling booster station design is provided,especially for the design and planning of domestic million kilowatt wind power base which has the voltage of over 500 k V.The research had the application value.