Valve base control equipment sequential method of modularization multilevel flexible DC transmission system

The present invention relates to a valve base control equipment sequential method of a modularization multilevel flexible DC transmission system. The method is a sequential logic operation method for modulation function, current balance control function, capacitance voltage balance control function, valve protection function, communication management function, bridge leg over-current protection function, and valve base control equipment self-check function possessed by the valve base control equipment of the modularization multilevel flexible DC transmission system. With the scheme provided in the invention, the control period is shortened to 100us and the whole control is delayed by less than 200us, thus the high real-time demand of the modularization multilevel flexible DC transmission system is fulfilled. Moreover, the method is proved to be stable and reliable in sequential cooperation by actual running tests.