学科分类
/ 1
5 个结果
  • 简介:

  • 标签:
  • 简介:ThisworkisaimedtorigorouslymanagevoltagesaturationandmaximumcurrentconstraintsinShuntActiveFilters.Inthisrespect,assuming'unconstrained'controlalgorithmshavealreadybeendefinedtoachievestandardobjectivesforsuchdevices(i.e.currenttrackingforharmoniccompensationandDC-busvoltageboundness),aplug-inunit,orientedtoextendthesystemoperatingregionandatthesametimepreservinggoodperformanceunderlargetransientsandoverloadconditions,ispresented.Thissolutionallowstoimproveavailability,robustnessandcomposabilityofShuntActiveFilters,whichareexpectedtobekeyfeaturesinpresentandnextgenerationcomplexandpossibly'smart'powergrids.Theproposedunitiscomposedbytwoparts.First,asuitableanti-windupstrategyisdefinedinordertodealwithcontrolinputsaturation.Itsmainpurposeistopreservetheoriginal'unconstrainederrordynamics',infaceofinputsaturation,whileguaranteeinglowcomputationalburdenandreducedperformanceimpairment(thelattergoal,inharmoniccompensationcontext,leadstorathernon-standardproblemformulation).Tothisaim,theanti-windupactsonthecurrentreferencesthroughasuitably-designedadditionaldynamics.Then,inordertocopewithcurrentlimitations,anadditionalstrategyhasbeendesigned;againthecurrentreferencesissuitablyshapedtocomplywiththefeaturesandboundsofthesystem,augmentedwiththeabove-mentionedanti-windupsolution.TheproposedschemecanbesimplyjoinedtoanykindofunconstrainedcontrolleradoptedtosteerShuntActiveFilters.Inthiswork,anInternal-Model-basedcurrentcontrollerisadoptedasabenchmarkcase.Theproposedapproachisvalidatethroughextensivesimulationtests.

  • 标签: SHUNT ACTIVE FILTERS power quality ANTI-WINDUP
  • 简介:transjugularintrahepaticportosystemic分流(尖端)是在由于肝肝硬化从门高血压有复杂并发症的病人的治疗证明了好处的一个可接受的过程。推迟的肝撕裂是尖端过程的稀罕复杂并发症。我们由于肝肝硬化与门高血压描述一个病人,突然在尖端以后与腹的出血和肝撕裂8d介绍了。很少报告在尖端放置以后描述了复杂并发症。就我们的知识而言,这是描述推迟的肝撕裂的第一份报告。这潜在、严肃的复杂并发症看起来为在门高血压的尖端特定、致命。我们倡导小心的注意到这种技术避免这复杂并发症,和及时治疗是极其重要的。

  • 标签: 肝硬化 门静脉 高压 延迟 治疗 分流
  • 简介:

  • 标签: