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In the optical voltage sensor based on first order electro-optic effects, the half-voltage of electro-optic crystal is one of the key factors influencing the input-output characteristic of sensors. With relative analysis of the electro-optic modulation mechanism, LiNbO3 crystal is chosen to set up the measurement system of half-voltage, measurement is done on half-voltage. Theoretical calculation...
In this paper, a type of sensor for the non-contact monitoring of lightning and switching overvoltage in power grid is presented. It is designed based on Pockels effect and stray-capacity coupling theory. Double-crystal structure is utilized to restrain the unwanted influence caused by natural birefringence. The transmission of the data is achieved by optical fibers which are immune to the electromagnetic...
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