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Urban rail transit thyristor type traction rectifier and feedback converter system

An urban rail transit and thyristor technology, applied in flexible AC transmission systems, AC network circuits, electrical components, etc., can solve problems such as huge consumption of train braking energy, achieve perfect protection functions, reduce fault domains, and high system reliability. Effect

Pending Publication Date: 2018-02-02
ZHENJIANG DAQO SECHERON TRACTION POWER
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Problems solved by technology

[0006] The purpose of the present invention is to provide a thyristor-type traction rectification and feedback conversion system for urban rail transit, to solve the problem of huge consumption of train braking energy, and to promote the recovery and application of urban rail train braking energy

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  • Urban rail transit thyristor type traction rectifier and feedback converter system
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  • Urban rail transit thyristor type traction rectifier and feedback converter system

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] The thyristor-type traction rectification and feedback conversion system is based on phase-controlled rectification and active inverter technology to realize urban rail transit traction power supply and regenerative braking energy recovery and utilization, such as figure 1 As shown in A and B, the basic principle is: a group of thyristor-type traction rectification and feedback conversion systems composed of thyristor rectifiers, thyristor inverters and transformers are connected in parallel next to the 24-pulse rectifier unit in the original subway power supply system. The system also has two functions of inverter feedback and traction power supply. When the subway train enters the station and brakes, since the train adopts regenerative braking, the kinetic energy of the train will be converted into electric energy and fed back to the D...

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Abstract

The invention discloses an urban rail transit thyristor type traction rectifier and feedback converter system comprising a 12-pulse thyristor rectifier, a 12-pulse thyristor inverter, a phase shiftingtransformer and an auto-transformer. The primary side of the phase shifting transformer is connected with a medium voltage ring network. The secondary side of the phase shifting transformer is connected with the AC side of the 12-pulse thyristor inverter. The DC side of the 12-pulse thyristor inverter is connected with a DC bus. The primary side of the auto-transformer is connected with the secondary side of the phase shifting transformer. The secondary side of the auto-transformer is connected with the AC side of the 12-pulse thyristor rectifier. The DC side of the 12-pulse thyristor rectifier is connected with the DC bus. The problem of huge consumption of train braking energy can be solved so as to promote recycling application of urban rail train braking energy.

Description

technical field [0001] The invention relates to an urban rail transit traction system, in particular to a thyristor-type traction rectification and feedback converter system for urban rail transit, which belongs to the technical field of power electronics. Background technique [0002] The thyristor-type traction rectification and feedback conversion system of urban rail transit is mainly used in the DC traction power supply system of subway or light rail. This system can realize the absorption and utilization of regenerative braking energy when the train is braking. , to provide electric energy for train traction and stabilize the DC bus voltage. According to statistics, the braking energy of urban rail transit can reach more than 20%-40% of the traction energy. In the face of such a huge power consumption, coupled with the policy of energy saving and consumption reduction and the requirements of technological upgrading, the subway traction power supply company is very The...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J13/00
CPCH02J13/0062H02J3/00Y02E40/10
Inventor 李学安钱小森吴杰金成龙朱晓勇
Owner ZHENJIANG DAQO SECHERON TRACTION POWER
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