All-fiber electronic current transformer frequency characteristic testing device and testing method
A technology for frequency characteristic testing and current transformers, applied in measuring devices, instruments, measuring electrical variables, etc., can solve problems such as inability to apply all-fiber electronic current transformers, achieve long-term stability and repeatability, and facilitate measurement Operation, the effect of satisfying the frequency band
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[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.
[0039] Firstly, the basic principle and mathematical model of the closed-loop operation of the all-fiber current transformer are introduced.
[0040] Such as figure 1As shown, the light emitted by the light source 1 passes through the coupling beam splitter 2 and reaches the polarizer 3 for polarization, and then passes through 45 . polarized beam splitter 4, and modulated by a square wave in the modulator 5, and converted into two beams of linearly polarized light at the same time, after passing through the fibe...
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