Modularization multi-level converter redundancy fault-tolerant control method
A modular multi-level, redundant and fault-tolerant technology, applied in the field of converters, can solve problems such as unstable operation of converters, changes in circulating current components, and a large number of sub-modules
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[0093] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0094] see figure 1 , the main circuit structure of the inverter side of the modular multilevel converter of the present invention includes:
[0095] The AC system 1 is connected to the transformer 2 . The transformer 2 is connected with the AC side inductor 3 and the AC system 1 . The AC side inductance 3 is connected with the transformer 2 and the bridge arm resistor 4, which is the link of energy exchange between the AC side and the modular multilevel converter, and also plays a certain filtering role. The bridge arm resistor 4 is connected with the AC side inductance 3 and the bridge arm inductance 5 . Bridge arm inductance 5, and bridge arm resistance 4 and (N+N r ) The sub-modules 6 are connected to each other, which plays a certain role in suppressing the circulation. Bridge arm (N+N r ) a sub-module 6, which is connected to the pos...
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