±500kV换流站不平衡光CT故障原因分析

Analysis of Failures on the Unbalanced Optical CT in the ± 500 kV Converter Station

介绍了电磁式CT与光CT的区别、光CT的原理、光CT与电力一次、二次系统之间的连接方式,重点对光CT运行中出现的异常、处理方法及维护过程注意事项进行总结。通过理论分析、现场实验方法,发现不平衡光CT在浇注方式、激光供电原理、设备自检等方面存在问题,并加以改进,提高了设备运行稳定性。

This paper describes differences between the electromagnetic CT and the optical CT, the working principles of the optical CT, and the connection between the optical CT and the primary and secondary systems of the power system. The paper mainly reviews the abnormalities of the optical CT in operation, treatments of these abnormalities and precautions in the maintenance. Through the theoretical analysis, field experiments and other methods, it is found that the imbalanced ray-CT has problems in its casting method in method, the principle of power supply and the self-test of the equipment. Proper improvement measures have been taken and the operation stability of the device has been enhanced.