Fluid Degradation Measurement Based on a Dual Coil Frequency Response Analysis

Sensors

JoseM. Guerrero¹  AlejandroE. Castilla¹  CarlosA. Platero¹  JoséÁngel Sánchez-Fernández² 

[1] Department of Automatic Control, Electrical and Electronic Engineering and Industrial Informatics, Universidad Politécnica de Madrid, E-28006 Madrid, Spain;Department of Hydraulic, Energy and Environmental Engineering, Universidad Politécnica de Madrid, E-28040 Madrid, Spain;

关键词: degradation;    fault diagnosis;    frequency response analysis;    predictive maintenance;    oil insulation;    capacitive sensors;   

DOI  :  10.3390/s20154155

来源: DOAJ

【 摘 要 】

Electrical industry uses oils for cooling and insulation of several machines, such as power transformers. In addition, it uses water for cooling some synchronous generators. To avoid malfunctions in these assets, fluid quality should be preserved. To contribute to this aim, a sensor that detects changes in fluid composition is presented. The designed sensor is like a single-phase transformer whose magnetic core is the fluid whose properties will be measured. The response of this device to a frequency sweep is recorded. Through a comparison between any measurement and a reference one corresponding to a healthy state, pollutants presence, such as water in oil or salt in water, can be measured. The performance of the sensor was analyzed through simulation. In addition, a prototype was built and tested measuring water concentration in oil and salt content in water. The correlation between pollutant concentration measured with the sensor and known pollutant concentrations is good.

【 授权许可】

Unknown