MMC sub-module IGBT open-circuit fault ride-through method based on fault sub-module independent control
An open-circuit fault, independent control technology, applied in the output power conversion device, electrical components, AC power input into DC power output and other directions, to achieve stability and voltage equalization, independent control, and excellent transition conditions.
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[0048] Below in conjunction with the accompanying drawings and specific embodiments, the present invention will be further clarified. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. Modifications of equivalent forms all fall within the scope defined by the appended claims of this application.
[0049] The present invention provides an MMC sub-module IGBT open-circuit fault ride-through method based on the independent control of the fault sub-module. In this embodiment, the method is applied to the fault ride-through control of a modular multilevel converter (MMC). Its single-phase MMC main circuit structure is as follows figure 1 As shown, its half-bridge sub-module structure is as follows figure 1 shown in the subfigure.
[0050] like figure 2 shown, when the half-bridge submodule Q 2 When an open-circuit fault occurs, the Q of the half-bridge submodule 1 The switch tub...
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