Small current grounding system single phase earth fault traveling wave line selection and distance measurement apparatus
A single-phase ground fault, small current grounding technology, applied in the field of power system, can solve the problems of being easily affected by interference signals, etc., and achieve the effect of wide application range and accurate measurement of fault distance
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[0038] The present invention will be further described below in conjunction with specific embodiments and with reference to the drawings.
[0039] The working principle diagram of the present invention, such as figure 1 Shown. The signal conversion board converts the zero sequence voltage and line current of the bus bar, including phase current, zero sequence current, etc., into a 0-10 volt voltage signal through isolation, and transmits it to the high-speed acquisition board connected to the signal conversion board.
[0040] The high-speed acquisition board, after receiving the 0-10V voltage signal from the signal conversion board, completes the conversion of analog signals into digital signals, and then performs high-speed acquisition and buffering. The high-speed acquisition board simultaneously receives the seconds pulse or B code granted by GPS and Beidou satellites as the synchronous sampling signal of each device, and the data is marked with an absolute time stamp. Then the...
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