Railway through-line power supply with both traction voltage compensation and railway electric power supply

Abstract

The invention relates to a railway through-line power supply with both traction voltage compensation and railway electric power supply, which is composed of an energy transfer module M1, a left-rightinterconnected energy transfer module M2, an isolated energy storage module M3 and a common DC three-phase through-line power supply module M4. At that time of use, the energy transfer module M1 absorb energy from the traction side and transfers it to the DC side, and connected to the two side bridge arms of the traction side, A left-right interconnect energy transfer module M2 draws energy from both side and transports that energy to the opposite side or absorbs the energy from the energy delivery module M1, The isolated energy storage module M3 transports and feeds back energy to its supercapacitor SC side. A public DC type three-phase through power supply module M4 supplies power to a railway through line, Moreover, the left and right interconnected energy transfer modules M2 compensatethe variation of voltage and harmonic wave, realize the super capacitor SC energy storage and power supply to the through line, so that the traction voltage compensation and the railway electric power supply can be taken into consideration, the power supply is stable, the quality is high, and the normal operation of the railway through load is ensured.

Description

technical field [0001] The invention belongs to the technical field of electrified railway electric power supply, and in particular relates to a railway through-line power supply that takes both traction voltage compensation and railway electric power supply into consideration. Background technique [0002] Electrified railway is the first choice for railway construction in the world. At present, my country's electrified railway construction mileage is in the forefront of the world. With the development of the national economy and support for the western region, the development of electrified railways in remote areas such as Qinghai, Tibet, Xinjiang, and Inner Mongolia has become more and more obvious. However, when the railway passes through this type of area, due to the sparsely populated area and harsh weather conditions, the railway power through line often lacks power supply protection, and there are various problems in conventional solutions. When long-distance power ...

AI Technical Summary

Problems solved by technology

When long-distance power supply is used, the construction and maintenance costs are extremely high; and when power transformers are used to transform the power supply from the traction side to the railway power, due to the nonlinearity and impact of the locomotive load, the voltage of the through-line often has harmonic content Serious power quality problems such as large, severe distortion, voltage surges and dips, etc., lead to severe tests for the through-line load, and even burn the load

[0003] In addition, problems such as voltage fluctuations and voltage distortions on the traction side caused by locomotive loads also plague the quality of power supply on the traction side and lead to deterioration of the incoming line voltage of the traction transformer

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