Study On Electromagnetic Force Of Damping Windings Of Generator/motor Under Abnormal Operation

As an effective tool for modern power grid management,power generation motor is the main characteristic of the motor,which is complex and frequent.Its operation behavior is directly related to the safe and stable operation of the power grid system.The damping windings are the key components that affect the stable operation of the electric motor.It is of great theoretical significance and practical value to study the electromagnetic force of the electric generator under the abnormal running state of the generator.In this paper,the generator as the research object,a field circuit coupled non normal operation of the generating conditions of time stepping finite element model and physical model of eddy current,on the basis of calculation,three kinds of short circuit fault(single-phase grounding short circuit,phase short circuit,two phase grounding short circuit),deduces the mathematical expression of single phase the grounding short circuit,phase short-circuit and two-phase grounding short-circuit magnetomotive force and electromagnetic force,reveals the laws of mathematics non normal operation of electromagnetic force generator motor power conditions.On the basis of consulting a large number of relevant documents,this paper points out the background and significance of the research,analyzes the relevant research background and the development trend at home and abroad.The electromagnetic force of the electric motor is analyzed and simulated under the abnormal operating state power generation condition,and the research content is determined,and the key to the pumped storage unit is carried out.The research of components is of great theoretical and practical significance.Taking the electric generator as the research object,the coupling time step finite element model of the field and road in the abnormal state power generation condition is set up,and the physical model is established by combining the structure parameters and the running characteristics.Through the analysis of the physical process of three kinds of short circuit fault(single-phase grounding short circuit,interphase short circuit,two phase grounding short circuit),the mathematical expressions of magnetic EMF and electromagnetic force of single-phase grounding short circuit,interphase short circuit and two phase grounding short circuit are deduced respectively,and the mathematical law of electromagnetic force under abnormal running state is revealed.Based on the physical model under the abnormal running state of the generator,the electromagnetic force of the damping winding in the abnormal operation of the load and the load operation is calculated.The variation of the parameters of the external short circuit fault is analyzed.The electromagnetic force change curve of the generator is given and its steady state is given.And the transient electromagnetic force is compared.