全光纤电子电流互感器技术探讨

随着输电电压升高到超高压、特高压,传统的基于电磁感应机理的电流互感器技术已暴露出越来越多的内在的、难以克服的缺点。因此,用电子电流互感器取代传统的电流互感器已是大势所趋。特别是目前在电力系统大力推进智能电网技术的形势下,电力系统对全光纤电子电流互感器技术的需求日趋增长。此外,在高频电流及微弱电流测量方面全光纤电流传感技术也有重要应用。在简要介绍全光纤电流传感技术的概念、基本分类之后,阐述了目前全光纤电流互感器技术实用化过程中遇到的主要技术障碍,探讨了可能的解决办法,介绍了光纤Bragg光栅、量子点掺杂光纤及光纤纳米线/微米线等新兴技术在光纤电流传感器中的应用。

Inquiry About All Fiber-Optic Electronic Current Transformer Technology

As the transmission voltages are increased up to ultra high voltages(UHV) and even high voltages(EHV), more and more intrinsic shortcomings, which are hard to overcome, of traditional current transformers(CTs) have been revealed. Therefore, it is an obvious trend that using electronic current transformers(ECTs) to replace traditional CTs. Especially, in the situations of that smart grid is advocating at present in electrical power systems, the demand of electrical systems for fiber-optic current transformer(FOCT) is increasing day by day. Besides, fiber-optic current sensors(FOCSs) have also many applications in areas of high freqency current and weak current measurement. After introducing to the basic concept and clasifications of FOCTs, the main technical hinders encountered in the realization procedure of FOCTs are elaborated, the possible solutions for the hinders are inquired into. Finally, applications of some new technologies, such as fiber Bragg gratings(FBG), quantum dot doped fibers, and fiber nanowires/microwires etc., in FOCSs are presented.