电气技术
電氣技術
전기기술
ELECTRICAL ENGINEERING
2012年
1期
6-10
,共5页
独立变桨距%统一变桨距%Coleman变换%塔影效应%载荷波动%PID控制器%俯仰弯矩%偏航弯矩
獨立變槳距%統一變槳距%Coleman變換%塔影效應%載荷波動%PID控製器%俯仰彎矩%偏航彎矩
독립변장거%통일변장거%Coleman변환%탑영효응%재하파동%PID공제기%부앙만구%편항만구
individual pitch%collective pitch%Coleman transformation%tower shadow%load fluctuation%PID controller%tilt moment%yaw moment
针对塔影效应引起风电机组载荷波动的情况进行研究,对其引入独立变桨距控制。建立风电机组风轮的线性时变模型,并将其写成状态方程的形式,进而引入Coleman变换将其变换成线性时不变模型。然后,在此模型基础上,加入PID控制器,从而完成独立变桨距控制系统的设计。在塔影效应的影响下,分别对独立变桨距控制和统一变桨距控制情况下风电机组的载荷波动进行仿真对比研究,并利用雨流统计法对风电机组进行疲劳分析。研究结果表明：在塔影效应影响下,采用独立变桨距控制策略的风电机组载荷波动较采用统一变桨距控制策略的风机有明显改善,削弱了塔影效应载荷波动的影响,并延长了机组的使用寿命。
針對塔影效應引起風電機組載荷波動的情況進行研究,對其引入獨立變槳距控製。建立風電機組風輪的線性時變模型,併將其寫成狀態方程的形式,進而引入Coleman變換將其變換成線性時不變模型。然後,在此模型基礎上,加入PID控製器,從而完成獨立變槳距控製繫統的設計。在塔影效應的影響下,分彆對獨立變槳距控製和統一變槳距控製情況下風電機組的載荷波動進行倣真對比研究,併利用雨流統計法對風電機組進行疲勞分析。研究結果錶明：在塔影效應影響下,採用獨立變槳距控製策略的風電機組載荷波動較採用統一變槳距控製策略的風機有明顯改善,削弱瞭塔影效應載荷波動的影響,併延長瞭機組的使用壽命。
침대탑영효응인기풍전궤조재하파동적정황진행연구,대기인입독립변장거공제。건립풍전궤조풍륜적선성시변모형,병장기사성상태방정적형식,진이인입Coleman변환장기변환성선성시불변모형。연후,재차모형기출상,가입PID공제기,종이완성독립변장거공제계통적설계。재탑영효응적영향하,분별대독립변장거공제화통일변장거공제정황하풍전궤조적재하파동진행방진대비연구,병이용우류통계법대풍전궤조진행피로분석。연구결과표명：재탑영효응영향하,채용독립변장거공제책략적풍전궤조재하파동교채용통일변장거공제책략적풍궤유명현개선,삭약료탑영효응재하파동적영향,병연장료궤조적사용수명。
Load fluctuation conditions of wind turbine under tower shadow was researched and individual pitch control was introduced.Establish the linear time-varying model of the rotor and make it into the form of the state equation.Then,make it into the linear time invariant model through Coleman transformation.Based on this model,achieve the design of individual pitch system with PID controller.load fluctuation conditions of wind turbine were simulated and compared under tower shadow between individual pitch control and collective pitch control and analyse the fatigue damage of wind turbine through rainflow cycle counting.The result shows that load fluctuation of wind turbine using the individual pitch control under tower shadow has better effect and it weakens the load fluctuation effect of tower shadow,extends the working life of wind turbine.
