Control method and system for inhibiting magnetizing inrush current of train traction transformer and train

A traction transformer and excitation inrush current technology, applied in electrical components, emergency protection circuit devices, etc., can solve problems such as traction transformer oversaturation, high-speed train impact, relay malfunction, etc., to eliminate excitation inrush current, reduce hazards, and reduce malfunctions Effect

Pending Publication Date: 2021-10-29
成都尚华电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The circuit breaker needs to be used to complete the circuit closing operation immediately after the train passes the phase separation. When the circuit breaker is closed, the traction transformer will be oversaturated due to the sudden change of the primary side voltage of the

Method used

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  • Control method and system for inhibiting magnetizing inrush current of train traction transformer and train
  • Control method and system for inhibiting magnetizing inrush current of train traction transformer and train
  • Control method and system for inhibiting magnetizing inrush current of train traction transformer and train

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Example 1

[0042] like figure 1 As shown, this embodiment provides a method of controlling a train traction transformer exciting carrier flow, including:

[0043] The mesh converter control system acquires contact network energy information in real time;

[0044] Determining whether the main circuit of the main circuit breaker is raised to the set value, if yes, the network side converter inverter control strategy is calculated according to the currently acquired contact network energy information;

[0045] According to the mesh side converter inverter control strategy driven the web side converter operating in the inverter and the inverter generates a modulation voltage;

[0046] After the modulation voltage generated by the mesh side converter satisfies the preset conditions, the main circuit breaker is closed.

[0047] It will be described here that the primary circuit breaker will be disconnected in advance when the train is excessively phase. After the train is too di...

Example Embodiment

[0059] Example 2

[0060] like figure 2 As shown, this embodiment provides a control system that suppresses the train traction transformer exciting carrost, including:

[0061] Data acquisition module: Used to get contact network energy information in real time;

[0062] Algorithm module: Used to detect whether the main circuit breaker's wired voltage rises to the set value, if so, the network side converter inverter control strategy is calculated according to the currently acquired contact network energy information;

[0063] Drive Module: Used to drive the mesh side converter in the inverter in the inverter according to the mesh side converter inverter, inverter;

[0064] Main circuit breaker manipulation module: After the modulation voltage generated in the mesh side converter satisfies the preset condition, the main circuit breaker is closed.

[0065] As a preferred, the algorithm module includes:

[0066] Detection module: Used to detect the main circuit of the wiring voltage...

Example Embodiment

[0071] Example 3

[0072] like image 3 As shown, this embodiment provides a train traction drive system, including the primary side by the main circuit, the traction transformer connected to the contact network, the traction transformer is connected to the AC end of the mesh side converter, the mesh converter The DC is connected to the DC end of the DC bus and the machine side converter, and the alternating current end of the machine side converter is connected to the train traction motor, and the train traction transmission system further includes a control system as described in Example 2.

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PUM

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Abstract

The invention provides a control method and system for restraining magnetizing inrush current of a train traction transformer and a train, and the control method comprises the steps: enabling a network-side converter control system to obtain the electric energy information of a contact network in real time; detecting whether the effective value of the incoming line voltage of the main circuit breaker rises to a set value or not, and if yes, calculating to obtain an inversion control strategy of the grid-side converter according to the currently obtained electric energy information of the overhead line system; driving the grid-side converter to work in an inversion state according to the inversion control strategy of the grid-side converter, and performing inversion to generate modulation voltage; and after the modulation voltage generated by the grid-side converter meets a preset condition, controlling the main circuit breaker to be closed. According to the invention, the grid-side converter is controlled to invert to generate the modulation voltage, and the main circuit breaker is closed after the modulation voltage meets the preset condition, so that the excitation inrush current generated by the traction transformer due to the direct closing of the main circuit breaker after the train passes through the neutral section can be effectively eliminated, the misoperation of the relay is reduced, and the harm of the excitation inrush current can also be reduced.

Description

technical field [0001] The invention relates to the field of train over-phase separation control, in particular to a control method, system and train for suppressing the excitation inrush current of a traction transformer of a train. Background technique [0002] my country's electrified railway uses 25kV single-phase power frequency AC power supply mode. In order to maintain the three-phase load balance of the power system and improve the power utilization rate of the power grid, the electrified railway adopts a segmented and phase-separated power supply mode. In the AC traction power supply system, the catenary generally adopts segmental commutation power supply, and a phase splitting device is installed between each phase. [0003] my country's electrified lines generally adopt the vehicle-mounted over-phase separation method, that is, only high-speed trains are allowed to pass through the phase-separation area by disconnecting the main circuit breaker. reduce. For the g...

Claims

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Application Information

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IPC IPC(8): H02H7/04
CPCH02H7/04
Inventor 张伟鹏王超何梅朱国端
Owner 成都尚华电气有限公司
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