Adjustable traction transformer for flexible through bilateral power supply system and equalizing current suppression method

A technology for traction transformers and power supply systems, applied in variable transformers, transformers, transformer/inductor coils/windings/connections, etc., can solve problems such as phase angle and amplitude difference, protection malfunction, power oscillation, etc.

Active Publication Date: 2021-07-06
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Application Information

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Problems solved by technology

[0002] The flexible penetrating bilateral power supply system is a power supply method that can improve traction power supply capacity, reduce electrical phase separation between traction substations, and is conducive to energy saving and load balance between substations. It has outstanding technical and economic indicators, but it also has inherent shortcomings. That is, due to the influence of system p

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  • Adjustable traction transformer for flexible through bilateral power supply system and equalizing current suppression method
  • Adjustable traction transformer for flexible through bilateral power supply system and equalizing current suppression method
  • Adjustable traction transformer for flexible through bilateral power supply system and equalizing current suppression method

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] refer to figure 1 , an adjustable traction transformer used in a flexible through-bilateral power supply system of the present invention, the traction power supply system includes two adjacent traction substations respectively having a first adjustable transformer A1 and a second adjustable transformer A2, the first adjustable The low-voltage lines 10 of the regulating transformer A1 and the second variable transformer A2 are connected to the traction network 20 .

[0033] refer to figure 2 , the high-voltage side winding of the first adjustable transformer A1 adopts star connection, and is provided with load or no-load taps, and an extension C-phase winding is added at the outlet. Adjustable tap K1, the low-voltage side winding is the basic winding and the second adjustable tap K2 is set, and its wiring is set to be adjustable according to th...

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Abstract

According to an adjustable traction transformer for a flexible through bilateral power supply system and an equalizing current suppression method, the voltage amplitude and the voltage phase are adjustable, and the zero-load voltage amplitude and voltage amplitude difference and phase difference of open loop points of no-load buses of two adjacent traction stations tend to be zero. Three windings in the high-voltage side of the first adjustable transformer are provided with first adjustable taps, windings on the low-voltage side of the first adjustable transformer are provided with second adjustable taps, and the voltage amplitude and the voltage phase angle of the first adjustable transformer are adjusted through the first adjustable taps and the second adjustable taps; three windings in the high-voltage side of the second adjustable transformer are provided with third adjustable taps, windings on the low-voltage side of the second adjustable transformer are provided with fourth adjustable taps, and the voltage amplitude and the voltage phase angle of the second adjustable transformer are adjusted through the third adjustable taps and the fourth adjustable taps; and the voltage amplitude and phase of the traction transformer are adjusted by adjusting the first adjustable tap, the second adjustable tap, the third adjustable tap and the fourth adjustable tap.

Description

technical field [0001] The invention relates to traction power supply technology for electrified railways, in particular to an adjustable traction transformer and a balanced current suppression method for a flexible through-bilateral power supply system. Background technique [0002] The flexible penetrating bilateral power supply system is a power supply method that can improve traction power supply capacity, reduce electrical phase separation between traction substations, and is conducive to energy saving and load balance between substations. It has outstanding technical and economic indicators, but it also has inherent shortcomings. That is, due to the influence of system power flow and network structure between adjacent traction substations, there will be a certain phase angle and amplitude difference in the voltage of the same-phase low-voltage bus of adjacent traction substations, which will cause The power flow of the system ring network changes. This change will form...

Claims

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Application Information

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IPC IPC(8): H01F29/00H01F27/28B60M3/00
CPCH01F29/00H01F27/28B60M3/00
Inventor 林宗良智慧李剑袁勇邓云川许晓蓉陈刚王世平王健宋梦容吴萍杨雪凇张雪林小奇
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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