易本顺. 光电式互感器的研究和发展及其在电力系统中的应用[J]. 武汉大学学报 ( 信息科学版), 2002, 27(1): 57-62.
引用本文: 易本顺. 光电式互感器的研究和发展及其在电力系统中的应用[J]. 武汉大学学报 ( 信息科学版), 2002, 27(1): 57-62.
YI Benshun. Research and Development of Optical Current and Voltage Transducers for Electrical Power System[J]. Geomatics and Information Science of Wuhan University, 2002, 27(1): 57-62.
Citation: YI Benshun. Research and Development of Optical Current and Voltage Transducers for Electrical Power System[J]. Geomatics and Information Science of Wuhan University, 2002, 27(1): 57-62.

光电式互感器的研究和发展及其在电力系统中的应用

Research and Development of Optical Current and Voltage Transducers for Electrical Power System

  • 摘要: 在电力系统中,光学传感器较之传统的电气传感器具有本质上的优越性。叙述了近年来光学电流互感器(OCT)、光学电压互感器(OVT)在实际电力系统中的应用方面的研究及发展,详细总结了从110kV三相OCT到500kV组合式光学电流电压测量系统(OMU)等实际项目的研究工作。对光学电流互感器的一些新型设计进行了探讨,并展望了应用于电站的基于光纤传感、光纤监控、光纤通信及光纤继电保护的光纤局域网。

     

    Abstract: In electrical power industry,optical sensors are inherently advantageous over conventional measurement techniques.In this paper,the research and developments of some high voltage optical current and optical voltage transducers are reported in detail.A three-phase optical current transducer was developed and put into use in a real 110kV electrical substation.The calibrated ratio errors within rated current range is less than 0.2%.By employing optical insulators,the optical current transducers are with good insulation,light weight and small size.At the same time,the combined current and voltage optical metering unit(OMU) for 500kV power system is presented.In the OMU,the BGO cystal and flint glass were used as sensing elements for high voltage and electrical current,respectively.The experimental results showed that both optical current sensor and optical voltage sensor were of good linearity.The specifically designed insulator for 500kV high voltage system was a optical insulator embedded in a conventional porcelain column.Some new technologies used in optical current sensors recently are discussed as well.These new sensors include:bulk glass optical current sensor with an adjustable multi-ring closed optical path,hybrid type bulk glass sensor with multiple critical angle reflections for sensitivity enhancement,right-triangle shaped detachable Faraday effect current clamp and fiber Bragg grating based magnetostrictive sensor for DC current measurements.The optical fiber technology used in power system in the future for optical sensing,optical monitoring,optical communication,optical relay protection and optical local area network are introduced as a conclusion.

     

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