摘要
Abstract
In recent years,horizontal pantograph disconnector has been used widely in power grid.However,most of its drive parts are exposed outside,causing frequent occurrence of mechanical defects.At present,its mechanical state is judged mostly by manual operation experience,which is difficult to achieve rapid and accurate diagnosis.In this paper,the variation trend of torque in the movement process of disconnector is analyzed by way of setting up the virtual prototype model of the horizontal pantograph disconnector and building the corresponding test platform.The torque-angle curves in case of normal state and different mechanical defects are compared.Both closing and opening torque increase obviously under the jamming defect.While,in case of fatigue defect of the balance spring,the open-ing torque increases but the closing torque decreases.Furthermore,when there is a defect of incomplete action,the fi-nal value of the closing torque increases or there is no typical peak in the engagement stage.Also,in case of three phase asynchronous defects,there are multiple wave peaks in the engagement period.Hereby,the mechanical state diagnosis method of the horizontal pantograph disconnector based on torque-angle curve is proposed and the installa-tion and commissioning of same type disconnector in a substation are taken as examples to prove that the rapid and accurate diagnosis of its mechanical state can be realized by using this method in engineering applications.关键词
隔离开关/动力学仿真/机械缺陷/缺陷诊断/工程应用Key words
disconnector/dynamic simulation/mechanical defect/defect diagnosis/engineering application
