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

被引：10

作者：

Zhang, Lu ^{[1
]}

Sun, Lei ^{[2
]}

Wu, Jingfeng ^{[1
]}

Han, Yanhua ^{[1
]}

Wang, Sen ^{[1
]}

Yang, Chuankai ^{[1
]}

Shen, Wei ^{[1
]}

Guo, Can ^{[1
]}

机构：

[1] State Grid Shaanxi Elect Power Res Inst, 669 Middle Aerosp Rd, Xian, Peoples R China

[2] Power China Northwest Engn Corp Ltd, 18 East Zhangba Rd, Xian, Peoples R China

来源：

IET SCIENCE MEASUREMENT & TECHNOLOGY | 2020年 / 14卷 / 01期

关键词：

pressure measurement; power transformer insulation; bushings; temperature sensors; temperature measurement; pressure sensors; palladium alloys; fault diagnosis; transformer oil; chemical sensors; chemical variables measurement; thin film sensors; silicon compounds; protective film; oil temperature; pressure monitoring; hydrogen measurement range; pressure measurement range; temperature measurement range; EHV transformer bushing; transformer bushing faults; power grid accidents; online multiparameter monitoring equipment; dissolved hydrogen; oil pressure; bushing oil; signal acquisition; control cabinet; data analysis; hydrogen sensor; oil-gas separation membrane; palladium alloy film technology; low power consumption; oil-less equipment; pressure; 0; 0 MPa to 1; MPa; temperature-40; 0 degC to 105; degC; 1; kPa; voltage; 330; kV; Si3N4; OIL-PAPER INSULATION; HYDROGEN SENSORS; PALLADIUM; TEMPERATURE; BEHAVIOR;

D O I：

10.1049/iet-smt.2019.0262

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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 degrees C, and the accuracy is +/- 1 degrees 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.

引用

页码：98 / 103

页数：6

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