高压直流电流测量装置的应用现状与研究进展

高压直流电流测量装置为高压直流输电系统的线路控制和保护提供输入信号。随着我国直流输电系统电压等级的不断升高,系统中的直流电流的测量已成为一个新课题。文章首先综述了已在国内外直流输电工程中运行的高压直流电流测量装置的结构和工作原理,指出各自存在的问题。然后介绍了我国在高压直流电流测量技术领域的研究进展,主要涵盖零磁通直流电流互感器、有源式直流电流互感器、全光纤式直流电流互感器、基于巨磁电阻效应的直流电流互感器和基于光纤光栅器件的直流电流互感器,希望能为未来高压直流电流测量装置的设计、实施与运行维护提供有益的参考。

Application Status and Research Progress of DC current measuring device for HVDC transmission system

DC current measuring devices provide input signals for control and protection system of HVDC transmission line. With the continuously increase of HVDC voltage class, DC current measurement in high-pressure environment has become a new subject. Firstly, the structure and working principle of high voltage DC current measuring which had been put into operation at home and abroad is reviewed in this paper, and their problems are pointed out. Then,the research progress of high-voltage DC current measurement techniques in China is introduced,which mainly covers zero flux DC current transformer, active DC current transformer, all-fiber DC optical current transformer, DC current transformers based on giant magneto- resistance effect(GMR) and DC current transformer based on fiber bragg grating(FBG), useful reference is given for the design, implementation, operation and maintenance of future high-voltage DC current measuring device.