Application Research Of Energy-fed Traction Power System For Metro

Along with the development of the economy, the city transportation hustles condition more and more rigorous, the daily pursuit and the life of serious influence people.The subway conduct and actions a kind of imbecility consume,low pollution,high-efficiency conveyance method, all got an extensive application in the big and medium-sized cities all round the worlds.It because of having speed quick,stand to be apart from short,rise to make to move a multifarious etc. characteristics, have become to solve fast transportation of city of valid way.Widespread in the subway make use of to the direct current to lead what the power supply system adopt is a diode to commutate a machine, the electric power can lead one-way fluxion of net toward the direct current from the exchanges charged barbed wire net.When the vehicle system move, the rebirth system amount of kinetic energy of the surplus makes the direct current charged barbed wire net electric voltage go up.Resolving a method traditionally establishes electric resistance system to move device, this results in two problem.The first problem is to can't make use of to make amount of kinetic energy effectively.The second problem BE, because of currently subway in main usage the thyristor is two kinds of to commutate a way and diode, so of commutated a way to be equal to toward charged barbed wire net to infuse into a great deal of harmonic and reactive power, will cause the net side electric current mutation, even influence the electric power quality of the electric power system seriously.For above, this text described a kind of new power supply system-the energy-fed traction power system.That system adopt three mutually the electric voltage type the PWM commutate the machine conduct and actions to change to flow unit, needing according to the energy fluxion at commutate,go against to change the work condition cut over, can surplus of the rebirth system amount of kinetic energy give something back to AC network.This text described the structure,function,characteristics and the work principle of that system, emphasizing to launch application study to the system from the exchanges side harmonic ,the direct current side characteristic both side.The subway that combines that system in Guangzhou in the meantime has already carried the camp circuit up install,experiment with circulate of actual data, carry on the valuation and verification to the stability and the economy energy function of that system.