A dual-current traction power supply system and power supply method for electrified railways
A traction power supply system, electrified railway technology, applied in electrical components, power supply lines, transportation and packaging, etc., can solve the problems of non-adjustable voltage and inability to realize energy feedback, achieve high equipment utilization, solve low power factor, technical mature effect
Active Publication Date: 2017-04-19
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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Problems solved by technology
In addition, the locomotives of different voltage levels and current systems produced by my country's main engine factories also need different test power supply systems to supply power to the corresponding voltage and current system locomotive lines. Now the DC voltage of my country's DC traction power supply system is mostly obtained by three-phase multiple diode rectification. , there are disadvantages such as non-adjustable voltage and inability to realize energy feedback
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[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0032] The dual-current traction power supply system for electrified railways of the present invention includes an AC power supply assembly 1 and a DC power supply assembly.
[0033] In the present invention, the AC power supply assembly 1 is used to provide AC27.5kV AC power supply, which is similar to the traditional electrified railway power supply system, that is, its function is to convert the external three-phase AC110kV or AC220kV power supply into a two-phase AC 27.5kV power supply via a traction transformer , respectively provide α arm and β arm power supply, but the selection of the power supply line path should take into account the size of the DC locomotive traction power supply current. A third circuit breaker 8 and a third isolating switch 9 are arranged on one phase, and a fourth circuit breaker 10 and a fourth isolatin...
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The invention discloses a tractive power supply system with a double-current system for an electrified railway and a power supply method. The tractive power supply system comprises an alternating current power supply component and a direct current power supply component. The alternating current power supply component is used for offering alternating current to supply power. A third breaker and a third disconnecting switch are arranged on one phase of the alternating current power supply component, and a fourth breaker and a fourth disconnecting switch are arranged on one phase of the alternating current power supply component. The direct current power supply component is used for providing direct current to supply power. The direct current power supply component comprises two direct current converting units of the same structure. Two phases of voltage on the secondary side of a traction transformer go through one direct current converting unit respectively, so that the needed direct current is acquired. The divide-shut brakes of a first breaker and a second breaker of one of the two direct current converting units are interlocked with a third breaker, and the divide-shut brakes of a first breaker and a second breaker of the other direct current converting unit is interlocked with the fourth breaker. The power supply method is based on the tractive power supply system. The tractive power supply system with the double-current system for the electrified railway and the power supply method have the advantages that structural principle is simple, the operation is simple and convenient, the application range is wide, and operation is high efficient and economical.
Description
technical field [0001] The invention mainly relates to the field of locomotive power supply systems, in particular to a dual-current traction power supply system and a power supply method suitable for electrified railways. Background technique [0002] At present, the locomotives in operation in my country include electrified railway AC locomotives powered by AC27.5kV traction power supply system and urban rail locomotives powered by DC1500 or DC750V traction power supply system. The traction power supply systems of these two types of locomotives are independent and can only be provided by matching locomotives. [0003] With the rapid development of urban rail transit construction, electric traction is being more widely used in the field of urban rail transit due to its high efficiency, speed, and energy saving. Multiple lines, from intra-city to inter-city, from a single underground railway system to a multi-system combining underground-ground-elevated, my country's electri...
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IPC IPC(8): B60M3/00H02J5/00
Inventor 周方圆涂绍平王卫安黄燕艳吴强龙礼兰邱文俊沈辉吴明水朱建波张定华文韬张典胡前
Owner ZHUZHOU NAT ENG RES CENT OF CONVERTERS