提高光学电流互感器运行稳定性的方法

为了解决光学电流互感器（OCT）的长期运行稳定性问题，提出了螺线管聚磁光学传感原理，证明了偏振光围绕无限长通电导体测量电流与偏振光通过通电螺线管的轴向方向测量电流，在光学传感测量电流的意义上是等价的，具有对偶性。基于以上原理设计了螺线管聚磁光路结构。在实验室测试和现场连续25个月的运行表明，采用这种结构的自适应光学电流互感器能够在实际环境中长期稳定运行。

Method to Improve the Operating Stability of Optical Current Transducer

The solenoid collecting magnetic field optical transducing principle is presented to improve the operating stability of optical current transducer(OCT). It is proved that the way to measure current by polarized light encircling conductor, and that by polarized light threading solenoid axes are equivalent. The optical structure based on solenoid collecting magnetic field is designed based on the principle above. The experimental and continuous 25 months'field operating results of adaptive optical current transducer(AOCT)in the substation indicate that AOCT using the above optical structure can operate steadily.