Direct-current breaker and cutoff method thereof
A DC circuit breaker and circuit breaker technology, applied in the field of power electronics, can solve the problems of poor economy, the breaking time cannot meet the multi-terminal flexible DC transmission system, and the loss is large, and achieve the effects of comprehensive functions, easy to use in series, and high speed.
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[0040] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.
[0041] A circuit breaker proposed in this embodiment has an electrical structure such as figure 1 As shown, it includes a commutation circuit, a current interruption circuit, and an energy absorption circuit connected in parallel; on top of this, this reasonable DC circuit breaker includes a control circuit, which is connected to the commutation circuit and the current interruption circuit, respectively, for controlling The turn-on and turn-off of the commutation loop and the cut-off loop, which may include a processor, DSP or FPGA, etc., such as Figure 4 shown. And, this embodiment further proposes,
[0042] The commutation circuit is used to switch the external current to the cut-off circuit, including a mechanical switch and a commutator unit connected in series to conduct bidirectional current; the commutator unit only bears t...
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