MMC (Modular Multi-level Converter) converter valve submodule device based on thyristor device and controlling method of submodule device
A thyristor and sub-module technology is applied to the MMC converter valve sub-module topology structure device and its control field based on thyristor devices, and can solve the problems of difficulty in balancing the voltage of sub-modules, increasing the number of sub-modules in series, and low rated voltage and current. , to achieve the effect of reducing control complexity, less series series, and large rated voltage and current
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[0032] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0033] The topological structure of the MMC converter valve sub-module based on the thyristor device provided by the present invention is as follows: figure 2 As shown, it includes a main circuit and a forced commutation circuit connected in parallel with its two ends; the main circuit includes a thyristor unit I, a thyristor unit II and a capacitor C; both the thyristor unit I and the thyristor unit II are composed of a thyristor and a diode antiparallel to it .
[0034] The thyristor unit I is connected in parallel with the thyristor unit II; the capacitor C is connected between the thyristor unit I and the thyristor unit II.
[0035] The thyristor unit I includes a thyristor T1 and a diode D1 connected in antiparallel with it; the cathode of the thyristor T1 is connected to the anode of the diode D1, and the cathode...
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