基于超声波技术的绕组变形3维成像检测装置设计

Design of 3D Imaging Winding Deformation Detection Device Based on Ultrasonic Method

电力变压器是重要而昂贵的电力设备,在运输和运行过程中,由于意外碰撞或系统短路故障的强大电动力的作用,可能会发生某种程度的绕组变形,因此,必须对变压器绕组进行带电检测,从而保证其安全可靠运行。为此,设计了基于超声波技术的变压器绕组变形3维成像检测装置。首先,为了解决超声波发射及接收探头的安放问题,提出一种超声波探头安放位置算法,通过对3种不同情况下超声波探头的安置方法的研究,提高了变压器绕组检测中超声波信号的接收效果。然后,提出一种基于超声波定位的距离转换算法,解决了被测点3维轴向坐标确定问题,据此实现了在测试现场实时生成变压器绕组3维图像的功能。接着,开发出变压器绕组变形检测装置,能够对变压器绕组实现实时3维成像和定量分析,从而完成对变压器绕组形变的带电检测。最后,在某变压器上进行了应用研究,证明了上述装置的有效性。

Power transformer is an important and expensive power device. During transport and operation, winding deformation may occur due to unexpected collision or the strong electromotive force of the system short-circuit fault. Therefore, live detection is very important for safe and reliable operation of transformer winding. We designed a three-dimensional imaging detection device for transformer winding deformation based on ultrasonic technology. Firstly, in order to solve the problem of the placement of ultrasonic transmitting and receiving probe, an ultrasonic probe placement algorithm was proposed. By studying the placement method of ultrasonic probe in three different situations, the receiving effect of ultrasonic signal was improved. Secondly, a distance conversion algorithm based on ultrasonic ranging was proposed, which could give the three-dimensional axial coordinate of the measured point, and realize the function of generating three-dimensional image of transformer winding in real time at the test site. Thirdly, we developed a winding deformation detection device, which could realize the transformer winding real-time three-dimensional imaging and quantitative analysis by live detection. Finally, the application in a transformer verified the effectiveness of the device.