| 主权项 |
1. A converter system comprising:
a first back-to-back converter comprising:
a first rectifier module comprising a first rectifier and a first controller, wherein the first rectifier has an input side and an output side so as to convert a first AC voltage to a first DC voltage, and the first rectifier is controlled by the first controller; anda first inverter module comprising a first inverter and a third controller, wherein the first inverter has an input side and an output side so as to invert the first DC voltage to a second AC voltage, and the first inverter is controlled by the third controller; and a second back-to-back converter comprising:
a second rectifier module comprising a second rectifier and a second controller, wherein the second rectifier has an input side and an output side so as to convert the first AC voltage to a second DC voltage, the second rectifier is controlled by the second controller, and the input side of the second rectifier is connected to the input side of the first rectifier in parallel; anda second inverter module comprising a second inverter and a fourth controller, wherein the second inverter has an input side and an output side, so as to invert the second DC voltage to the second AC voltage, the second inverter is controlled by the fourth controller, and the output side of the second inverter is connected to the output side of the first inverter in parallel, wherein the first and second rectifiers have a rectifier frequency, the first and second inverters have an inverter frequency, and a circular current of the converter system is suppressed through the synchronous operation of the first and second rectifiers or through the synchronous operation of the first and second inverters. |
