Influence of coupling effect between excitation winding and damping winding on transient current characteristics of large synchronous condenser
In order to solve the problem of low precision in transient analysis of large synchronous con-denser,an accurate transient analysis model of synchronous condenser considering coupling effect of exci-tation windings and damping windings was proposed.Firstly,an accurate transient analysis model consid-ering the coupling effect of excitation winding and damping winding was established by introducing char-acteristic reactance,and the characteristic reactance was solved based on excitation current fitting.Then,the transient current characteristics of the rotor were compared between the traditional model and the pre-cise model by simulating the three phase short circuit and the BC phase short circuit fault.Finally,the machine-network transient simulation model of synchronous condenser was established to analyze the tran-sient operation characteristics of the precise model of the synchronous condenser when the AC bus voltage of the system is fluctuating.The results show that accuracy of synchronous condenser of rotor transient current is higher when considering the coupling effect of excitation winding and damping winding.In three cycles after the three phase short circuit fault and the BC phase short circuit fault,the precision of the transient analysis accurate model of the excitation current mean value of peaks increases by 27.27％and 61.53％,respectively.
synchronous condensertransient parametermotor modelrotor transient currentultra-high voltage direct current transmission systemfinite element
NETL
NSTL
万方数据
