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Jun Zhao - IEEE Xplore Author Profile

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A novel in- line closed-loop polarization maintaining fiber temperature sensor (CPMF-TS) is designed, which adopts a reciprocal configuration to reduce the susceptibility to optical path noises and environmental disturbances, and uses a closed-loop square-wave modulation and demodulation scheme to improve sensitivity, linearity, and dynamic range, while reducing the influence of system power fluct...Show More
Traditional optical voltage transformers (OVTs) based on electro-optical and inverse piezoelectric effects are gradually exposing their accuracy and reliability issues. In contrast, fibers for measuring electricity have unique properties and significant advantages in the high-voltage power industry, especially fiber optic current sensor (FOCS), which has been widely used in the field of high-volta...Show More
Compared with traditional current sensors, the inherent advantages of fiber optic current transformers (FOCT) in terms of passive, immunity to electromagnetic interference, free hysteresis, free saturation, etc., make them quite attractive in high electromagnetic field environments. As a result, a fiber optic voltage measurement scheme (FOCT-OVT) based on FOCT together with a capacitive voltage di...Show More
The inherent advantages of fiber optical current transformer (FOCT) are very attractive for high-voltage applications when compared with conventional transformers. However, the accuracy and long-term reliability of FOCT can be greatly affected by temperature. Fiber temperature sensors are suitable for FOCT temperature compensation, especially in ultrahigh voltage (UHV) applications. As a result, a...Show More