基于电—声联合的变压器局部放电监测系统的研究设计

发布时间：2018-02-19 18:48

本文关键词： 电-声联合变压器局部放电监测系统信号采集　出处：《河北科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：变压器是保证电网系统正常运行、保障供电可靠性的基础设备,若出现问题或故障,将会造成大范围停电,严重影响人们的正常生活与工厂的生产用电,造成严重的经济损失。由于现有的变压器局部放电检测系统的检测精度偏低,错报率偏高,所以研制一套完善可靠的变压器局部放电检测系统变得非常重要。在系统总结国内外研究经验的基础上,在UHF传感装置、HFCT传感装置、AE传感装置等局部放电信号采集装置的配合下,基于图形化的编程语言LabVIEW 7.1软件平台编程,设计并开发了一套以电-声联合为基础的变压器局部放电在线监测系统。该系统整合了UHF超高频监测、HFCT高频电流监测、AE超声波监测等优点,克服了固有的孤立系统无法对变压器内在的局部放电进行相对完善的检测的弊病,有效地提高了局部测量的灵敏度、定位的准确性与抵御干扰的能力。软件方面,采用集成模块化设计,有助于提高该系统数据运算分析的速率和可靠性。另外该系统通过与变压器内部结构的优化设计后整合内嵌安装,减小了系统对变压器本身电磁平衡的干扰,提高了系统的灵敏度和抵御干扰的能力。通过采用本系统对110/10kV地下变电站三台主变在线运行进行实际测量,结果表明:电-声联合在线检测系统在变压器局部放电监测和分析上的应用是可行和有效的,并且系统中的各类功能都已实现了设计的要求,为变压器的状态检修提供大量可靠的数据依据,为解决变压器局部放电检测问题提供了新的方案和参考。
[Abstract]:Transformer is the basic equipment to ensure the normal operation of power network system and the reliability of power supply. If there are problems or failures, it will cause a large-scale power failure, which will seriously affect the normal life of people and the production of power consumption in factories. Because the detection accuracy of the existing partial discharge detection system of transformer is on the low side, and the misreporting rate is on the high side, Therefore, it is very important to develop a complete and reliable partial discharge detection system for transformers. With the cooperation of partial discharge signal acquisition device such as UHF sensor device and AE sensor device, the software platform of LabVIEW 7.1 is programmed based on graphic programming language. A transformer partial discharge on-line monitoring system based on electro-acoustic combination is designed and developed. The system integrates the advantages of UHF UHF monitoring, HFCT high-frequency current monitoring and AE ultrasonic monitoring, etc. It overcomes the shortcoming that the inherent isolated system can not detect the internal partial discharge of transformer, and effectively improves the sensitivity of local measurement, the accuracy of location and the ability of resisting interference. The adoption of integrated modular design is helpful to improve the speed and reliability of data operation and analysis of the system. In addition, the system is integrated with the embedded installation after the optimization design of the internal structure of the transformer. The interference of the system to the electromagnetic balance of the transformer itself is reduced, and the sensitivity of the system and the ability of resisting interference are improved. By using this system, the on-line operation of three main substations in 110 / 10 kV underground substations is measured. The results show that the application of the combined electro-acoustic on-line detection system in transformer partial discharge monitoring and analysis is feasible and effective, and all kinds of functions in the system have fulfilled the design requirements. It provides a large amount of reliable data basis for transformer condition maintenance, and provides a new scheme and reference to solve the problem of transformer partial discharge detection.
【学位授予单位】：河北科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP274;TM41

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