This dissertation introduces the loads s characteristics of electrified railroad in mountain zone, then analyzes and expatiates the power supply mode、connection mode of traction transformer、voltage lever、over-load capacity of traction transformer, and advances the corresponding viewpoints.

Review on the Efiect of Harmomics of Electrified Railway and the Corresponding Standards;

Business service flow modeling with UML for electrified railway SCADA database system;

Dynamic detection of contact line height in electrified railway;

Study on summation exponent of harmonic of electric railway;

Then this paper proposed the compensation and applying method of series capacitor compensation device which meet the requirement of the electric railway in China, and the method is meaningful to improving the traction power supply quality of electric railways in China.

Power quality of electric railway was introduced in this paper.

Modified static var compensator of electrified railways;

In the end it is emphasized how to simulate the electrified railways by use of the computer simulation technology.

The composite compensation of harmonic and reactive power of electrified railways needs reac-tive power dynamic compensation.