China railway high-speed 2 (CRH2) motor train unit ground power supply source

The utility model discloses a China railway high-speed 2 (CRH2) motor train unit ground power supply source. The power supply source comprises an alternating current reactor, a frequency converter, an output sine wave filter and an output transformer, wherein alternating current of three-phase alternating current power of AC400V and 50Hz is subjected to alternating current-direct current-alternating current (AC-DC-AC) conversion through the alternating current reactor and the frequency converter, is then changed into sine wave through the output sine wave filter, is further changed into single-phase alternating current of AC400V and 50Hz through the output transformer and is connected with a field socket through a power transmission cable to supply power for a CRH2 motor train unit through the field socket. The CRH2 motor train unit ground power supply source has a simple and rational structure, and is safe and reliable in use; high-power frequency conversion, filtering and voltage stabilizing technologies are adopted; and the conventional alternating current power is converted into stable pure sine wave power with required frequency, so that a stable power supply environment can be provided for the CRH2 motor train unit; and after the AC-DC-AC conversion, a power grid is not influenced when three-phase or two-phase power is taken from an output end.