Investigate To Identify Winding Deformation Of Transformer And Design The Equipment

Power transformer is one of the important equipment.The stability of the safe operation of power systems is essential.Power transformer winding deformation means that the winding of the size or shape of irreversible changes under the electric power and the role of mechanical force.It includes axial and radial size changes.These reasons are a serious threat to the safe operation of the electric power system.If you discover hidden dangers of accidents transformer early, it will to avoid accidents,the greatest degree of reduction of losses.So the detection of transformer winding deformation,has a very important significance.Researching in domestic and international basic theory of detecting transformer winding deformation and the detection method,then basing on the frequency response method researched and designed the transformer winding deformation apparatus.In the paper, firstly reaserched currently three basic testing methods about domestic and international power transformer winding deformation.It includes low-voltage impulse method,short-circuit impedance and frequency response method. Compared advantages and disadvantages and then choosing the frequency response method for detecting transformer winding.In this basis,based on DDS technology,USB technology,Bluetooth technology,EDA technology,LabVIEW technology designed transformer winding deformation apparatus.In the sweep signal generation,using DDS technology and sweep frequency control signal made the precision more high;In the communications,the use of USB technology,achieved voltage amplitude/high frequency signal data transmission in a high speed;As an auxiliary means of communication with Bluetooth technology for wireless transmission;Using EDA technology and PLL technology to achieve high-speed sampling control signal generation; Using LabVIEW technology, display amplitude and frequency characteristics of transformer in graphics.In this paper,based on the design of the hardware system,programed application software,and described the dynamic link library,FFT algorithm,LabVIEW platform data processing in detail.The apparatus of transformer winding deformation has reasonable structure,is convenient to analyse by graphics and easy to upgrade and expand.Simulation results show that meet the design requirements.