首页|Modeling and control of a synchronous generator with an active DCload
Modeling and control of a synchronous generator with an active DCload
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The design and analysis of a system consisting of a variable-speedsynchronous generator that supplies an active DC load (inverter) througha three-phase diode rectifier requires adequate modeling in both time-and frequency-domains. As an example, the system's control-loops aredifficult to design without an accurate small-signal model; at the sametime, the system protection design requires large-signal transientmodeling. A particularity of the described system is strong nonidealoperation of the diode rectifier, a consequence of the large value ofthe generator's synchronous impedance. This nonideal behavior influencesboth steady-state and transient performance. This paper presents anaverage model of the system that accounts, in a detailed manner for thedynamics of the power source and the load, and for the effects of thenonideal operation of the diode rectifier. The model is nonlinear, buttime-continuous, and can be used for large- and small-signal analysis.The developed model was verified on a 105 kW generator-set with inverteroutput, whose DC-link voltage control-loop design was successfullycarried out based on the average model. It is shown that a highbandwidth is needed for this control-loop in order to achieve the properimpedance matching between the power source and the active electronicload
AC-DC power convertorsDC-AC power convertorsclosed loop systemscontrol system analysiscontrol system synthesisinvertorsload (electric)machine controlmachine theoryrectifying circuitssynchronous generatorsvariable speed gearvoltage controlDC-
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