The invention relates to an energy feedback system of a rail transit bidirectional traction rectifier. The system comprises a traction network, a traction inverter, a filter, a traction rectifier, a converter transformer, a switch cabinet and a power grid, which are connected in sequence, wherein the traction rectifier is connected with the main control unit; the system further includes a three-level inverter that is connected with the traction rectifier in parallel and is respectively connected with the main control unit through a voltage measuring unit, a current measuring unit, a temperature detecting unit, a driving unit and a protecting unit, wherein the main control unit is further connected with a three-phase output end of the three-level inverter through a feedback voltage detecting unit. Compared with the prior art, the three-level inverter is directly connected with the traction rectifier in parallel, so that the independent three-level inverter is adopted for energy feedbackand the unified main control unit is adopted for control, and therefore, the current conversion problem generated during energy feedback can be solved, and compared with traditional bidirectional controllable rectification, the energy feedback efficiency is high, the inversion reduction degree is high, and the influence on an energy feedback injection system is small.
本发明涉及一种轨道交通双向牵引整流器的馈能系统,包括依次连接的牵引网、牵引逆变器、滤波器、牵引整流器、变流变压器、开关柜和电网,所述牵引整流器连接主控单元,还包括并联连接牵引整流器的三电平逆变器,所述三电平逆变器分别通过电压测量单元、电流测量单元、温度检测单元、驱动单元、保护单元与所述主控单元连接,所述主控单元还通过回馈电压检测单元连接三电平逆变器的三相输出端。与现有技术相比,本发明将三电平逆变器直接与牵引整流器并联,采用独立三电平逆变器进行馈能,由统一主控单元进行控制,可以解决能量回馈时产生的换流问题,比传统双向可控整流馈能效率高,逆变还原度高,对馈能注入系统的影响小。
Energy feedback system of rail transit bidirectional traction rectifier
一种轨道交通双向牵引整流器的馈能系统
2020-07-07
Patent
Electronic Resource
Chinese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
Bidirectional traction rectifying device for urban rail transit
European Patent Office | 2021
|Research Progress of Urban Rail Transit Traction Power Supply System with Bidirectional Converters
DOAJ | 2024
|