DC/DC converter for flexible direct current transmission and its control method
A technology of flexible DC power transmission and control methods, which is applied in the direction of converting DC power input to DC power output, output power conversion devices, and adjusting electrical variables, and can solve problems such as large device stress, large volume, and large system loss, and achieve Solve the effect of large device stress
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[0037] Embodiment: combine below Figure 1 to Figure 5 This embodiment will be described in detail.
[0038] refer to figure 1 and figure 2 , the DC / DC converter for flexible direct current transmission described in this embodiment includes a diode string D1 to a diode string D4, a half-bridge sub-module string, an inductor L, a switch S1, and a switch S2;
[0039] The circuit structures of the diode strings D1 to D4 are the same, and each diode string includes a plurality of diodes connected in series in forward direction;
[0040] The half-bridge sub-module string includes half-bridge sub-module SM1~half-bridge sub-module SMN, and the circuit structure of the half-bridge sub-module SM1~half-bridge sub-module SMN is the same. For the half-bridge sub-module SM1~half-bridge sub-module SMN, the former The current output terminals are in turn connected to the current input terminals of the latter;
[0041] The anode of the diode string D1 is connected to the anode of the DC ...
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