Power supply seamless switching device and method of electrified railway traction substation

A technology for traction substations and electrified railways, applied in circuit devices, electrical components, emergency power supply arrangements, etc. The effect of flexible scheduling of maintenance time and improving work efficiency
CN105932769AActive Publication Date: 2016-09-07NARI NANJING CONTROL SYST
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
NARI NANJING CONTROL SYST
Publication Date
2016-09-07

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Abstract

The invention discloses a power supply seamless switching device and method of an electrified railway traction substation. Four paths of voltages, namely two-phase voltages of buses a and b of a contact network and voltages of a bus I and a bus II of a power supply, and four switching position signals, namely switches 201A and 201B of a low-voltage side of a main transformer 1B and switches 202A and 202B of a low-voltage side of a main transformer 2B are accessed to the switching device. During application, the current running mode of the traction substation is identified according to access quantity, automatic charging is achieved to prepare for switching if the running mode is normal, and discharging is performed to lock a switching function if the running mode is abnormal; three switching modes of parallel automatic switching, parallel semi-automatic switching and series switching can be performed; an optimal switching-on mode can be selected according to a real-time relation between the bus voltages of the power supply and the bus voltages of the contact network during switching on; and six modes of parallel rapid switching, rapid switching, same-phase lead phase angle switching, same-phase lead time switching, residual voltage switching and long delay switching can be performed, and uninterruptible power supply switching of two power supplies of the electrified railway traction substation can be achieved.
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Description

technical field

[0001] The invention relates to the technical field of electrified railway power supply, in particular to an electrified railway traction substation power supply seamless switching device and method. Background technique

[0002] At present, the development of my country's electrified railway industry is advancing by leaps and bounds. Under the background of the country's large-scale infrastructure construction, the state has invested in the construction of a large number of electrified railway projects. Electric locomotives need to be powered by traction substations along the railway, and a large number of traction substations need to be built. The voltage level of traction substations is 110kV or 110kV. In order to ensure the reliability of power supply, the electrified railway traction station adopts two-circuit incoming power supply, and the substation is configured as two main transformers. During normal operation, a single transformer supplies power to ...

Claims

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