Being no saturation under fault current conditions and high level of insulation , optical current transducer ( oct ) has been thought as the appropriate substitute of the electromagnetic current transformer . however , the outside factors , such as environment temperature , make so much influence on the precision and stability of oct that baffled its utility in power system 光学电流互感器( oct )自问世以来以其无饱和、高绝缘等优良性能被认为是传统电磁式电流互感器的替代产品，但长期以来oct的实用化道路充满荆棘，阻碍oct实用化的主要难题在于外界因素如温度等对oct测量精度和长期运行稳定性的影响难以克服。
