Sensors, Vol. 24, Pages 2722: Design of A Transformer Oil Viscosity, Density, and Dielectric Constant Simultaneous Measurement System Based on A Quartz Tuning Fork

Sensors, Vol. 24, Pages 2722: Design of A Transformer Oil Viscosity, Density, and Dielectric Constant Simultaneous Measurement System Based on A Quartz Tuning Fork
Sensors doi: 10.3390/s24092722
Authors:
Hao Yang
Shijie Chen
Jiafeng Ding

Transformer oil, crucial for transformer and power system safety, demands effective monitoring. Aiming to address the problems of expensive and bulky equipment, poor real-time performance, and single parameter detection of traditional measurement methods, this study proposes a quartz tuning fork-based simultaneous measurement system for online monitoring of the density, viscosity, and dielectric constant of transformer oil. Based on the Butterworth–Van Dyke quartz tuning fork equivalent circuit model, a working mechanism of transformer oil density, viscosity, and dielectric constant was analyzed, and a measurement model for oil samples was obtained. A miniaturized simultaneous measurement system was designed based on a dedicated chip for vector current-voltage impedance analysis for data acquisition and a Savitzky–Golay filter for data filtering. A transformer oil test platform was built to verify the simultaneous measurement system. The results showed that the system has good repeatability, and the measurement errors of density, viscosity, and dielectric constant are lower than 2.00%, 5.50%, and 3.20%, respectively. The online and offline results showed that the system meets the requirements of the con...

Source: Sensors - April 24, 2024 Category: Biotechnology Authors: Hao Yang Shijie Chen Jiafeng Ding Tags: Article Source Type: research