电力变压器振动检测装置设计及振动信号去噪方法研究

Research on the design of power transformer vibration detection device and the vibration signal de-noising method

针对电力变压器在运送和装配过程中受外力作用使变压器绕组变形,运行过程中绕组变形积累到一定程度使电力变压器抗短路能力下降,但这种现象在早期不易被发现,成为潜在事故隐患问题。论文选用具有浮点运算、单指令周期执行复杂计算的高性能控制器,结合模拟型高灵敏度单轴加速度计,设计能够测试电力变压器箱体关键点处三轴振动信息电力变压器振动检测装置。论文进一步研究针对加速度计检测到的电力变压器三轴振动信息能够用在高性能控制器中的去噪方法,为提高振动检测结果准确度及准确分析变压器振动产生的机理提供基础。

The winding deformation of power transformer is caused by external force in the process of transportation and assembly.The winding deformation accumulates to a certain extent in the process of operation,so that the anti-short-circuit capacity of power transformer decreases.However,this phenomenon is not easy to be found in the early stage and becomes a potential accident.In this paper,a high-performance controller with floating-point operation and performing complex calculation in single instruction cycle,combining with high-sensitivity single axis analog accelerometer,is selected to design a power transformer vibration detection device,which can test the three-axis vibration information at the key point of the power transformer box.Furthermore,this paper further studies the de-noising method which can be used in the high-performance arm controller for the three-axis vibration information of the power transformer detected by the accelerometer,which improves the accuracy of the vibration detection results and provides the basis for the accurate analysis of the vibration generation mechanism of the transformer.