NDLI: Development of multi-parameter online monitoring equipment for EHV transformer bushing

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Development of multi-parameter online monitoring equipment for EHV transformer bushing

Content Provider	IET Digital Library
Author	Zhang, Lu Sun, Lei Wu, Jingfeng Han, Yanhua Wang, Sen Yang, Chuankai Shen, Wei Guo, Can
Abstract	To diagnose the running state of bushing and avoid serious power grid accidents, online multi-parameter monitoring equipment for dissolved hydrogen, oil pressure and temperature in bushing oil was developed. The equipment includes three units: signal acquisition, control cabinet and data analysis. A new hydrogen sensor without oil–gas separation membrane and based on palladium alloy film technology was developed. A three-in-one sensor for hydrogen, oil temperature and pressure monitoring has been developed, which has the advantages of miniaturisation, lightweight and easy installation. Test results show the hydrogen measurement range of the sensor is 0–5000 ppm, and the accuracy can reach 10% or 15 ppm (with larger values). The pressure measurement range is 0–1.0 MPa, the resolution is 0.1 kPa, and the accuracy can reach 0.25 grade. The temperature measurement range is −40 to 105°C, and the accuracy is ±1°C. The measurement performance of the device fully meets the requirement of online monitoring of transformer bushing. The equipment has been put into operation in a 330 kV substation, which can monitor the bushing status online and help eliminate the early latent fault of bushing in the weak budding state.
Starting Page	98
Ending Page	103
Page Count	6
ISSN	17518822
Volume Number	14
e-ISSN	17518830
Issue Number	Issue 1, Jan (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-smt/14/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2019.0262
Journal	IET Science, Measurement & Technology
Publisher Date	2019-10-31
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Bushing Oil Bushings Chemical Sensor Chemical Variables Measurement Control Cabinet Data Analysis Dissolved Hydrogen EHV Transformer Bushing Fault Diagnosis Hydrogen Measurement Range Hydrogen Sensor Low Power Consumption Oil Pressure Oil Temperature Oil-less Equipment Oil–gas Separation Membrane Online Multiparameter Monitoring Equipment Organic Insulation Palladium Alloy Palladium Alloy Film Technology Power Grid Accidents Power Transformer Insulation Pressure 0.0 MPa to 1.0 MPa Pressure 0.1 KPa Pressure And Vacuum Measurement Pressure Measurement Pressure Measurement Range Pressure Monitoring Pressure Sonsor Protective Film Sensing And Detecting Device Si3N4 Signal Acquisition Silicon Compound Temperature -40.0 DegC to 105.0 DegC Temperature Measurement Temperature Measurement Range Temperature Sonsor Thermal Variables Measurement Thermometry Thin Film Sonsor Transformer And Reactors Transformer Bushing Fault Transformer Oil Voltage 330.0 KV
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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