Research on residual magnetism measurement method for converter transformers based on induced energy
When there is too much residual magnetism in the iron core,it can cause a large amplitude of excitation inrush current,leading to the burnout or misoperation of the converter protection device,and seriously affecting its normal operation.In order to eliminate the influence of residual magnetism on converter transformers,this paper proposes a residual magnetism measurement method for converter transformers based on the energy change on one side of the induction coil of the converter transformer,which is the induced energy.The purpose is to calculate the residual magnetism of the converter transformer core by fitting the relationship between the induced energy and the residual magnetism of the converter core based on the energy change generated on one side of the induction coil of the converter transformer,while applying external excitation to the converter transformer.The method proposed is easy to execute,has strong operability,and has little impact on the properties of the converter.It can provide relia-ble support for the measurement and elimination of residual magnetism in the converter.In addition,the experi-mental results also confirmed the time saving and economic benefits of this method.
万方数据
维普
