Novel modular multilevel converter submodule topology circuit and control method thereof
A modular multi-level, topological circuit technology, applied in the direction of converting AC power input to DC power output, electrical components, output power conversion devices, etc., can solve the problem of MMC power switch sub-module damage, weak fault current suppression ability, Reduce the reliability of the inverter and other issues, achieve strong fault current suppression capabilities, avoid power switching devices, and suppress fault current effects
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[0058] Attached below Figure 1-5 To further illustrate the present invention,
[0059] Such as figure 1 As shown, the present invention includes an incoming line port X and an outgoing line port Y, at least two half-bridge sub-modules are connected in series between the incoming line port X and the outgoing line port Y, and the half-bridge sub-module has an input port, an output port and output port two,
[0060] A switch device is provided at the front end of each half-bridge sub-module input port,
[0061] A thyristor is provided at the front end of each half-bridge sub-module output port 1;
[0062] At the rear end of the last sub-module, a thyristor at the end and a switch device at the end are also connected in parallel;
[0063] A diode is connected between the output port 1 of the front terminal module and the output port 2 of the rear terminal module in two adjacent sub-modules;
[0064] A head-end diode is connected between the incoming line port X and the outpu...
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