Control method for redundancy use in the event of failure of multiphase power converter with distributed energy storage

摘要

The invention relates to a method for controlling a power converter having at least two phase modules, which each have an upper and a lower valve branch, each having at least three series-connected two-pole subsystems, in the event of failure of at least one subsystem of a valve branch of a phase module. According to the invention, the valve branch (T1, T6) with the failed subsystem (10) is determined, and in each case a subsystem (10) of a valve branch (T1, T6), which corresponds to the faulty valve branch (T1, T6), of any fault-free phase module (100) is driven such that its terminal voltages (UX21) are in each case zero. A polyphase power converter with distributed energy stores (9) is therefore operated with redundancy.