Two-level two-direction current transformer and control method thereof
A bidirectional converter and control method technology, applied in the field of power transmission and transformation, can solve the problems of current waveform distortion, power generation and transmission hazards, excessive charging current, etc., and achieve the effects of filtering power factor, fault diagnosis and convenient inspection
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[0020] Such as figure 1 As shown, a two-stage bidirectional converter of the present invention includes DC circuit breaker 1, DC filter 2, DC / DC converter 3, DC / AC converter 4, AC filter 5, AC contactor I6, AC Contactor II 7, isolation transformer 8, AC circuit breaker 9, DC / DC PWM drive circuit 12, DC / AC PWM drive circuit 13, control board 10 and man-machine interface 11;
[0021] Wherein, the input end of the DC filter is connected to the battery pack via a DC circuit breaker; the low voltage end of the DC / DC converter is connected to the output end of the DC filter, and the high voltage end is connected to the low voltage end of the DC / AC converter The input end of the AC filter is connected to the high voltage end of the DC / AC converter, and the output ends are respectively connected to the AC contactor I and AC contactor II in parallel with each other;
[0022] The low voltage end of the isolation transformer is connected to the output ends of the AC contactor I and the AC con...
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