Modular multi-level multi-terminal flexible direct current system direct current fault handling method
A modular multi-level, multi-terminal flexible technology, applied in the direction of electrical components, emergency protection circuit devices, etc., can solve the problem of large flexible DC topology, does not involve multi-terminal system fault handling methods, and does not consider temporary DC fault fault recovery Problems and other problems, to achieve the effect of protecting equipment safety, simple and easy troubleshooting methods, and achieving timeliness
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[0038] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0039] In this embodiment, aiming at the temporary DC fault problem of the multi-terminal flexible DC system, a method for handling the DC fault of the multi-terminal flexible DC system is given.
[0040] In the multi-terminal flexible DC system of this embodiment, taking three terminals as an example, three groups of relays (S 1-1 , S 1-2 ), (S 2-1 , S 2-2 ) and (S 3-1 , S 3-2 ) and three groups of corresponding relay protection devices (which can be relays), one relay and the corresponding relay protection device of each group are set at the DC end of the flexible DC system, and the other relay and the corresponding relay protection device are set at the DC end On the line, the relays set on the same DC line are placed together. Such as figure 2 and image 3 The system shown, where the relays of the two DC lin...
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