Configuration method of DC circuit breaker based on node type of converter station
A technology of DC circuit breaker and configuration method, which is applied to emergency protection circuit devices, power transmission AC networks, electrical components, etc., can solve the problems of poor economy, increase in quantity, and high cost of DCB, so as to reduce the scope of power outages and increase the stability of power supply. sexual effect
- Application Information
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Problems solved by technology
 Such as Figure 9 As shown, when considering the DC circuit breaker configuration method based on the node type of the converter station, the requirements for DCB configuration are as follows:
 1) Reduce investment costs as much as possible. DCB is expensive. The protection of DC power grid should reduce the number of DCB configurations as much as possible and improve the economy of the scheme while meeting the basic requirements of safe and reliable operation of the system and fast fault isolation.
 2) Minimize the scope of power failure as much as possible. When the DC grid fails, only the faulty line should be cut off from the DC grid. The most ideal effect is that the two circuit breakers at both ends of the faulty line operate to isolate the faulty line only, minimize the impact on the rest of the line, and ensure the continuity and reliability of power supply to the greatest extent.
 3) Shorten the blocking time of the converter station ...
 On the basis of Example 1, such as figure 1 As shown in the figure, type1 in the figure is a converter station without fault clearing capability, type2 refers to a converter station with clearing capability, and the dotted line indicates that the DCB configuration at the other end of the overhead line is configured according to the node type of the converter station at the port.
 The specific configuration method is described as follows:
 1) When there are multiple outgoing lines at the outlet of a node that does not have the ability to clear DC faults, install a DCB at the exit of each line, such as figure 1 a) as shown;
 2) When a node without fault clearing capability is connected to the AC system, and there is only one outgoing line at the outlet, since this node has a relatively small impact on the entire DC grid, for economic considerations, only at the far end of the line (near the other A node) to install a DCB, and install a UFD at the...
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