Protection voltage calculation method for passive breakdown protection device of sub-module device
A technology for breakdown protection and voltage protection, applied in emergency protection circuit devices, overvoltage-responsive protection, emergency protection devices that automatically disconnect, etc., can solve the problem of no calculation method, lack of scientific calculation methods and basis problems, to achieve the effect of improving the rationality and accuracy of the design
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[0029] The present invention will be further described below. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0030] see figure 1 , the modular multilevel converter includes at least one sub-module connected in series, the sub-module is a half-bridge, full-bridge topology, etc., and the AC port of the sub-module adopts a bypass switch K and a passive breakdown protection device SCR for bypass protection .
[0031] An embodiment of the present invention provides a method for calculating the protection voltage of a sub-module passive breakdown protection device, such as figure 2 shown, including:
[0032] Step 1: Determine the highest voltage value U under the operating conditions of the sub-module nom , to calculate the overvoltage protection action value of the sub-module:
[0033] u p =k p * U nom ,
[0034] Among them, k p For the safe...
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