Patent ID: 8861899

Claim:
An optical fiber current transformer with optical fiber temperature acquisition and temperature compensation, comprising: a broadband light source, a depolarizer, a beam splitter, a temperature acquisition unit, a current acquisition unit, a modulation waveform generating unit, a data processing unit and a calculating compensation unit; wherein an output port of said broadband light source is connected with an input port of said beam splitter by said depolarizer, a first output port of said beam splitter is connected with said calculating compensation unit by said temperature acquisition unit, a second output port of said beam splitter is connected with said data processing unit by said current acquisition unit, said data processing unit is connected with said calculating compensation unit, said calculating compensation unit is connected with said current acquisition unit by said modulation waveform generating unit; wherein said temperature acquisition unit outputs a first digital temperature DT 1 and a second digital temperature DT 2 to said calculating compensation unit, said current acquisition unit outputs digitized photoelectronic signals, DOES, to said data processing unit, said data processing unit obtains a measured current I in by analyzing said DOES and then outputs said measured current I in to said calculating compensation unit, so that said calculating compensation unit outputs a real-time output high-precision measured current I out ; wherein said calculating compensation unit outputs an error correcting signal to said modulation waveform generating unit, said modulation waveform generating unit produces a modulation voltage signal V in accordance with said error correcting signal, and then transmits said modulation voltage signal V to said current acquisition unit; wherein said calculating compensation unit is used to perform temperature compensation for said optical fiber current transformer.