METHOD FOR NETWORK CONTROL OF SYNCHRONOUS SMOOTH START-UP FOR CONVERTERS OF OWN NEEDS OF MOTOR-CAR ROLLING STOCK CONNECTED IN PARALLEL Russian patent published in 2022 - IPC H02J3/40 

FIELD: electrical engineering.

SUBSTANCE: according to the method, when the first auxiliary converter is connected with the bus, auxiliary converters other than the first synchronously connect to the network during the first amplitude smooth starting process. Conducted according to the invention are: the logic of quick connection to the network, the logic of quick bus tracking, and a method for controlling the PQ decline. The logic of quick connection to the network includes recognising the first auxiliary converter and auxiliary converters other than the first; the logic of quick bus tracking includes phase and frequency tracking, as well as amplitude tracking. The method for controlling the PQ decline includes introducing a correction coefficient K.

EFFECT: provided quick, reliable and automatic connection to the network of auxiliary converters in the emergency traction mode of a multiple unit train, and reduction in the startup time in various operating conditions.

8 cl, 10 dwg