A New Topology of Combined DC Circuit Breaker
A DC circuit breaker and combined technology, which is applied to AC network circuits, emergency protection circuit devices for limiting overcurrent/overvoltage, circuit devices, etc., can solve problems such as failure protection functions of fast mechanical switches, and achieve Reduce the probability of device breakdown, good economy, and the effect of reducing pressure
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[0027] The existing combined DC circuit breaker, the specific topology is as follows figure 1 , figure 2 As shown, by adopting only one expensive main breaking part on each bus corresponding to the converter station, it can effectively remove the fault occurring on any connected line and greatly save the manufacturing cost. However, when this combined circuit breaker is in normal operation, the device continues to withstand high voltage for a long time, and there is a main break grounding process when any line fault operates, and it does not have the failure protection function for the fast mechanical switch, so further improvement is still needed.
[0028] In view of the above shortcomings, this embodiment provides a new type of combined DC circuit breaker topology, the topology diagram is as follows image 3 As shown, the new combined DC circuit breaker topology uses only one main breaker on each DC bus, one failure auxiliary switch, a transfer switch TS0 connected in seri...
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