风电场低电压穿越技术研究.pdf

Subject:StudiesontheLowVoltageRideThroughofWindFarms Subject:StudiesontheLowVoltageRideThroughofWindFarms SSuubbjjeecctt::SSttuuddiieessoonntthheeLLoowwVVoollttaaggeeRRiiddeeTThhrroouugghhooffWWiinnddFFaarrmmss Specialty: PowerSystemandAutomation Specialty: PowerSystemandAutomation SSppeecciiaallttyy:: PPoowweerrSSyysstteemmaannddAAuuttoommaattiioonn Name:ZHANGSen-feng (Signature) Name:ZHANGSen-feng (Signature) NNaammee::ZZHHAANNGGSSeenn--ffeenngg ((SSiiggnnaattuurree)) Instructor:SHANGLi-qun (Signature) Instructor:SHANGLi-qun (Signature) IInnssttrruuccttoorr::SSHHAANNGGLLii--qquunn ((SSiiggnnaattuurree)) ABSTRACT ABSTRACT AABBSSTTRRAACCTT Wind power became the fastest growing renewable energy to the advantages of large capacity todevelop, cleaning, etc.With theimprovement ofwind turbine unit capacityand the development of control technology, wind power generation system through the development from distributed energy to the centralized large-scale wind farm. When the wind power penetration is higher, the wind turbine out of operation during a grid failure will adversely affect the grid. In order to make the wind turbines maintain connected the grid when the grid voltage sags, the grid safe operation standards require that the wind turbines with a certain low-voltage operationcapability. This paper mainly focuses on the low voltage ride through technology of wind farm which containing direct drive wind turbines and doubly-fed wind turbines. The wind turbine development, the research situation, the technical requirements for wind farms connected to the grid and low voltage ride