Nonlinear inversion-based output tracking control of a boiler-turbine unit

(整期优先)网络出版时间:2005-04-14
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Thecapabilitytoperformfastload-followinghasbeenanimportantissueinthepowerindustry.Anoutputtrackingcontrolsystemofaboiler-turbineunitisdeveloped.Thesystemiscomposedofstableinversionandfeedbackcontroller.Thestableinversionisimplementedasafeedforwardcontrollertoimprovetheload-followingcapability,andthefeedbackcontrollerisutilizedtoguaranteethestabilityandrobustnessofthewholesystem.Loop-shapingH∞methodisusedtodesignthefeedbackcontrollerandthefinalcontrollerisreducedtoamultivariablePIform.Theoutputtrackingcontrolsystemtakesaccountofthemultivariable,nonlinearandcouplingbehaviorofboiler-turbinesystem,andthesimulationtestsshowthatthecontrolsystemworkswellandcanbewidelyapplied.