Stability Analysis Of Grid-connected Wind Farms Using HVDC And HVAC Technology

More and more attention on fossil energy consumption and pollution to theenvironment.The use of clean energy,especially wind power,bring a new form of powergeneration for the word.With the development of power electronic technology,VSC-HVDChas made rapid progress due to its unique technical merits.It is a new technology field tosafely supply the load center with bulk electric energy which comes from large scale windfarms.Under the circumstance,this article focuses on the content：firstly introduce the windpower system,and study the VSC-HVDC model,the sending station and by the end stationcontrol strategy have been designed which interconnection of wind farm.The integrated windfarm based on DC transmission using voltage source converters(VSC-HVDC)and ACtransmission respectively are established respectively in simulation softwareDIgSILENT/PowerFactory. Comparing and researching two types of grid to improve thetransient stability and low voltage through ability.Finally,on the basis of the front,the new FACTS device controller-unified power flowcontroller，and introduce of it into the wind farm by AC power grid system,to study the effecton improving performance theAC grid.