Study of key operation and maintenance parameters of optical measurement system based on purely optical current transformer

Based on the operation and maintenance experience of pure optical current transformer in the field application of a domestic ultra-high voltage converter station, this paper elaborates the operation principle of the optical measurement system applied in the engineering field, researches the key state quantities affecting the accuracy and reliability of the optical measurement system, and proposes that the relative optical power should be used as the core key parameter, and the absolute optical power, the temperature of the sensor head, the temperature of the optical module, and the half-wave voltage should be used as the auxiliary parameter, so that the optical measurement system can be realized as a stable operation monitoring and early warning configuration. The relative optical power is proposed as the core key parameter, and the absolute optical power, sensing head temperature, optical module temperature, and half-wave voltage are proposed as auxiliary parameters, so as to realize a monitoring and early warning configuration for the stable operation of optical measurement system. The role of key parameters and reliable operation range are clarified, and data analysis and processing are carried out through the system to realize real-time monitoring of key state quantities.