用压力平衡光纤超声波传感器阵列在变压器油中定位双部分放电源
Feng Liu1, Yansheng Shi1, Shuainan Zhang1
1School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China.
Sensors (Basel, Switzerland)
|July 27, 2024
概括
一个具有压力平衡结构的新型光纤超声波传感器有效地检测变压器油中的双部分放电 (PD) 源,即使在高油压下. 这一进步提高了变压器的可靠性和维护计划.
科学领域:
- 电气工程 电气工程
- 材料科学 材料科学 材料科学
- 声学 声学 在声学方面
背景情况:
- 部分放电 (PD) 是功率变压器绝缘降解和故障的一个关键因素.
- 由于现有传感器在高油压和内部障碍下存在的局限性,对双重PD源的准确定位具有挑战性.
- 现有的压电和FP传感器在检测变压器油箱深处的双 PD 源时,在灵敏度和准确度方面存在困难.
研究的目的:
- 开发一个带有压力平衡结构的光纤超声波传感器,用于检测变压器油中的双部分放电 (PD) 源.
- 为了克服影响传感器灵敏度的油压限制,并使在高压条件下进行检测.
- 创建一个双PD检测系统,用于精确地定位电力变压器中复杂的故障类型.
主要方法:
- 设计和实施具有压力平衡结构的光纤超声波传感器.
- 开发使用一系列这些传感器的双 PD 检测系统.
- 应用交叉定位算法来检测和定位双 PD 源.
- 在各种断层区域使用35kV单相变压器测试系统.
主要成果:
- 建议的传感器在检测双 PD 源时,即使在高油压下,也表现出良好的灵敏度和方向清晰度.
- 传感器阵列成功地检测并定位了在油和绕间断层中的双 PD 源,而没有阻碍.
- 该系统有效地检测到来自双 PD 源的排放波形在受阻区域,如变压器绕油通道内.
- 压力平衡结构适应油压变化,提高深入油箱内的传感器性能.
结论:
- 带有压力平衡结构的光纤超声波传感器有效检测功率变压器中的双 PD 源.
- 这项技术增强了电力变压器的在线监控能力,提高了运行可靠性.
- 开发的系统为精确定位复杂的双重PD故障提供了强大的解决方案,有助于预测性维护.
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