Xu Shuxing, Shang Yurui, Li Zhenming, Lu Yongling, Liu Mingyang, Liu Wei, Wang Zhen, Tang Wei
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China.
Energy Storage and Electrotechnics Department, China Electric Power Research Institute, Beijing 100192, China.
Sensors (Basel). 2024 Mar 1;24(5):1606. doi: 10.3390/s24051606.
To ensure stable and normal transformer operation, light gas protection of the transformer Buchholz relay is essential. However, false alarms related to light gas protection are common, and troubleshooting them often requires on-site gas sampling by personnel. During this time, the transformer's operating state may rapidly deteriorate, posing a safety threat to field staff. To tackle these challenges, this work presents the near-field, thin-sliced transformer monitoring system that uses Electromagnetic Energy Transmission and Wireless Sensing Device (ETWSD). The system leverages external wireless energy input to power gas monitoring sensors. Simultaneously, it employs Near-Field Communication to obtain real-time concentrations of light gases, along with the electrified state and temperature. In field testing conducted on transformer relays' gas collection chambers, the ETWSD effortlessly monitors parameters within warning ranges, encompassing methane gas concentrations around 1000 ppm, leakage voltage ranging from 0-100 V, and relay working temperatures up to 90 °C. Additionally, to facilitate real-time diagnosis for electrical workers, we have developed an Android-based APP software that displays current light gas concentrations, leakage voltage collection values, and temperature, while also enabling threshold judgment, alarms, and data storage. The developed ETWSD is expected to aid on-site personnel in promptly and accurately evaluating transformer light gas protection error alarm faults. It provides a method for simultaneous, contactless, and rapid monitoring of multiple indicators.
为确保变压器稳定正常运行，变压器瓦斯继电器的轻瓦斯保护至关重要。然而，与轻瓦斯保护相关的误报很常见，排查这些误报通常需要工作人员进行现场气体采样。在此期间，变压器的运行状态可能会迅速恶化，对现场工作人员构成安全威胁。为应对这些挑战，本工作提出了一种使用电磁能量传输与无线传感装置（ETWSD）的近场、薄片式变压器监测系统。该系统利用外部无线能量输入为气体监测传感器供电。同时，它采用近场通信获取轻瓦斯的实时浓度以及带电状态和温度。在对变压器继电器集气室进行的现场测试中，ETWSD轻松监测处于警告范围内的参数，包括甲烷气体浓度约1000 ppm、泄漏电压0 - 100 V以及继电器工作温度高达90°C。此外，为便于电气工作人员进行实时诊断，我们开发了一款基于安卓的APP软件，该软件可显示当前轻瓦斯浓度、泄漏电压采集值和温度，还能进行阈值判断、报警和数据存储。所开发的ETWSD有望帮助现场人员迅速准确地评估变压器轻瓦斯保护误报警故障。它提供了一种同时、非接触且快速监测多个指标的方法。
