TRAIN CONTROL SYSTEM

Claims

1. A train control system comprising traction transformer located outside the train; a traction auxiliary converter (TAC) located inside the train and comprising at least a rectifier module, a direct current (DC) module and an inverter module, wherein the rectifier module is placed in a circuit in which the secondary side winding of the traction transformer is placed, the rectifier module is connected to the direct current module via a first connecting element, and the direct current module is connected to the inverter module via a second connecting element, the rectifier module is configured to receive a first alternating current (AC) power supplied by the traction transformer and to convert the first AC power into a first direct current power, the direct current module is configured to receive the first direct current power and supply the first direct current power to the inverter module, the inverter module is configured to receive the first direct current power and convert the first direct current power into a second alternating current power.

2. The system of claim 1, wherein the rectifier module comprises at least one set of first bridge arm components, the first connecting element comprises a first composite busbar, two ends of each set of first bridge arm components are connected to the first composite busbar, and the first composite busbar is connected to two ends of the DC module.

3. The system of claim 1, wherein the inverter module comprises at least one set of components of the second bridge arm, the second connecting element comprises a second composite busbar, two ends of each set of components of the second bridge arm are connected to the second composite busbar, and the second composite busbar is connected to two ends of the DC module.

4. The system of claim 1, wherein the DC module comprises at least a reference capacitor, and the capacitance of the reference capacitor is determined at least in accordance with the first power and the nominal voltage of the DC module.

5. The system of claim 4, wherein the inverter module is connected to at least one motor, and the first power is determined at least in accordance with the second power of the motor and the third power of the rectifier module.

6. The system of claim 1, wherein the inductance value of the DC module is determined at least in accordance with the first inductance of the rectifier module, the second inductance of the DC module, the third inductance of the inverter module, and the coupling inductance, wherein the coupling inductance includes at least the inductance of the coupling between the rectifier module and the DC module and the inductance of the coupling between the DC module and the inverter module.

7. The system of claim 6, wherein the DC module comprises at least a first submodule and a second submodule, and the coupling inductance further also includes a coupling inductance between the first submodule and the second submodule.

8. The system of claim 1, wherein the traction auxiliary converter further comprises an auxiliary inverter module connected to the DC module via a third connecting element, the DC module is configured to receive the first DC power and supply the first DC power to the auxiliary inverter module, the auxiliary inverter module is configured to receive the first direct current power and convert the first direct current power into a third alternating current power.

9. The system of claim 8, wherein the auxiliary inverter module comprises at least one set of components of the third bridge arm, the third connecting element comprises a third composite busbar, two ends of each set of components of the third bridge arm are connected to the third composite busbar, and the third composite busbar is connected to two ends of the DC module.

10. The system of claim 8, wherein the inductance value of the DC module is also determined in accordance with the fourth inductance of the auxiliary inverter module.