The Effect On Fuyang Electric Fence Of The Beijing-Kowloon Electrified Railway

With the development of the economic needs, the electrification railroad is a key stonedevelopment traffic in our country, however, the electric locomotive load is asymmetricalwith high-power, also has the complex changeable running status and randomness, when itworks, massive negative sequence current can be produced, and also lead to the emergence ofthree-phase power grid caused asymmetry, harmonics generated from the voltage waveformdistortion; and the Phenomenon of low Power factor. Therefore, analysis the effect on electricfence of the electrified railway can make sure the power system more stable, security andeconomical operation.This passage mainly studies on objects of Fuyang electric fence and electrified railways in Anhui Province,analysis the current situation of Fuyang electric fence and power supply mode of Beijing-kowloon electrified railways'sites. Then analyzed the influence of electrical railway traction load to Fuyang Power system.The mathematicmodel of electrical railway traction Ioad is developed. The harmonic and asymmetry modelsof elements of Power system are also developed. Based on these studies,calculatingasymmetry load flow and harmonic current with electrical railway traetion load is developed.The solution is used to calculate the harmonic current in Fuyang Power system.With the calculating results the influence of harmonic to relaying protection,automatic control.Enhance the quality of the power, and also to create a favorable electric environment and promote the development of local economic.