Medium voltage holding control method and device for train neutral section passing and storage medium

Abstract

The embodiment of the invention provides a medium voltage holding control method and device for train neutral section passing and a storage medium. The method comprises the steps that in the neutral section passing process of a to-be-controlled train, the first real-time speed of the to-be-controlled train is obtained; according to the first real-time speed, a medium-voltage maintaining control strategy corresponding to the train to be controlled is determined; if the medium-voltage holding control strategy corresponding to the train to be controlled is a low-speed neutral-section passing medium-voltage holding control strategy, auxiliary load shedding control is started, and after the auxiliary load shedding control succeeds, the control state of the traction converter is controlled according to the low-speed neutral-section passing medium-voltage holding control strategy; if the medium-voltage holding control strategy corresponding to the train to be controlled is the high-speed passing neutral section medium-voltage holding control strategy, the control state of the traction converter is controlled according to the high-speed passing neutral section medium-voltage holding control strategy. According to the method, the traction recovery time after the train goes out of the split phase is effectively shortened, and forced stopping caused by no traction output due to too low speed is avoided.

Description

Technical Field

[0001] The present application relates to the field of computer technology, and in particular to a method, device and storage medium for controlling medium voltage maintenance during train over-phase. Background Art

[0002] Phase separation is an area in the railway power system used to isolate different power supply sections. Since railway power grids usually use different voltage levels or phase angles to supply power, when trains pass through different power supply sections, they need to pass through phase separation to avoid interference and instability in the power system. The design and management of phase separation is crucial to ensure the safe operation of trains and the stability of the power system.

[0003] In the related art, when the train enters the split phase area at a lower speed, the auxiliary converter is shut down and the traction high-voltage cooling system stops working. After the train leaves the split phase area, the main circuit breaker is closed and the intermediate DC circuit is pre-charged. After the intermediate DC voltage is established, the auxiliary converter is restarted, the medium voltage power supply is restored, and the traction high-voltage cooling equipment and other loads are started in a time-sharing manner. After the traction high-voltage cooling system works normally, the traction conditions of the train are met again.

[0004] However, in the prior art, the time from closing the phase-splitting main circuit breaker to restoring the traction force is relatively long, and the train is forced to stop, which affects the train operation order. Summary of the invention

[0005] The embodiments of the present application provide a method, device and storage medium for controlling the medium voltage maintenance of a train during over-phase separation, so as to shorten the traction recovery time after the train is out of phase separation and avoid the situation where the train is forced to stop due to low speed and no traction output.

[0006] In a first aspect, an embodiment of the present application provides a method for controlling medium voltage maintenance of a train during phase separation, comprising:

[0007] During the process of the train to be controlled passing through a phase, obtaining a first real-time speed of the train to be controlled;

[0008] Determine, according to the first real-time speed, a medium voltage maintenance control strategy corresponding to the train to be controlled, wherein the medium voltage maintenance control strategy includes a high-speed over-phase medium voltage maintenance control strategy and a low-speed over-phase medium voltage maintenance control strategy;

[0009] If the medium voltage maintenance control strategy corresponding to the train to be controlled is the low-speed over-phase medium voltage maintenance control strategy, the auxiliary load reduction control is started, and after the auxiliary load reduction control is successful, the control state of the traction converter is controlled according to the low-speed over-phase medium voltage maintenance control strategy;

[0010] If the medium voltage holding control strategy corresponding to the train to be controlled is the medium voltage holding control strategy for passing neutral section at high speed, then control the control state of the traction converter according to the medium voltage holding control strategy for passing neutral section at high speed.

[0011] In a possible implementation manner, the determining the medium voltage holding control strategy corresponding to the train to be controlled according to the first real-time speed includes: if the first real-time speed is greater than the activation threshold of medium voltage holding for passing neutral section at high speed, then determine that the medium voltage holding control strategy corresponding to the train to be controlled is the medium voltage holding control strategy for passing neutral section at high speed; if the first real-time speed is less than the activation threshold of medium voltage holding for passing neutral section at high speed and greater than the activation threshold of medium voltage holding for passing neutral section at low speed, then determine that the medium voltage holding control strategy corresponding to the train to be controlled is the medium voltage holding control strategy for passing neutral section at low speed.

[0012] In a possible implementation manner, the controlling the control state of the traction converter according to the medium voltage holding control strategy for passing neutral section at low speed includes: controlling the traction converter to enter the low-speed medium voltage holding mode, so as to keep the auxiliary converter and the traction-related cooling equipment working normally in the low-speed medium voltage holding mode.

[0013] In a possible implementation manner, after controlling the traction converter to enter the low-speed medium voltage holding mode, it further includes: obtaining the second real-time speed of the train to be controlled; if the second real-time speed is less than the exit threshold of medium voltage holding for passing neutral section at low speed, then control the traction converter to exit the low-speed medium voltage holding mode.

[0014] In a possible implementation manner, the controlling the control state of the traction converter according to the medium voltage holding control strategy for passing neutral section at high speed includes: controlling the traction converter to enter the high-speed medium voltage holding mode, so as to keep the auxiliary converter and the medium voltage auxiliary load working normally in the high-speed medium voltage holding mode.

[0015] In a possible implementation manner, after controlling the traction converter to enter the high-speed medium voltage holding mode, it further includes: obtaining the third real-time speed of the train to be controlled; if the third real-time speed is less than the activation threshold of auxiliary load shedding control, then start the auxiliary load shedding control.

[0016] In a possible implementation manner, after controlling the traction converter to enter the high-speed medium voltage holding mode, it further includes: obtaining the fourth real-time speed of the train to be controlled; if the fourth real-time speed is less than the exit threshold of medium voltage holding for passing neutral section at high speed and greater than the activation threshold of medium voltage holding for passing neutral section at low speed, then switch the traction converter to the low-speed medium voltage holding mode.

[0017] In a possible implementation, it further includes: obtaining the medium voltage holding control condition of the train to be controlled; when the medium voltage holding control condition meets the medium voltage holding exit condition, exiting the medium voltage holding control mode, where the medium voltage holding exit condition includes at least one of the train to be controlled leaving the neutral section and the main circuit breaker being closed, the real-time speed corresponding to the medium voltage holding control condition being less than the low-speed neutral section passing medium voltage holding exit threshold, and the auxiliary load shedding control being unsuccessful.

[0018] In a second aspect, an embodiment of the present application provides a medium voltage holding control device for a train passing through a neutral section, including: at least one processor; and

[0019] a memory communicatively connected to the at least one processor; where

[0020] the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the above first aspect and / or various possible implementation manners of the first aspect.

[0021] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, they are used to implement the above first aspect and / or various possible implementation manners of the first aspect.

[0022] The medium voltage holding control method, device, and storage medium for a train passing through a neutral section provided by the embodiments of the present application determine the medium voltage holding control strategy corresponding to the train to be controlled according to the first real-time speed of the train to be controlled; if the medium voltage holding control strategy is the low-speed neutral section passing medium voltage holding control strategy, start the auxiliary load shedding control, and after the auxiliary load shedding control is successful, control the control state of the traction converter; if it is the high-speed neutral section passing medium voltage holding control strategy, control the control state of the traction converter according to the high-speed neutral section passing medium voltage holding control strategy. It can ensure that the traction converter is in the medium voltage holding mode both when the train passes through the neutral section at low speed and high speed, effectively shorten the traction recovery time after the train exits the neutral section, and avoid the situation that the train is forced to stop due to too low speed and no traction output. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0024] Figure 1 It is a schematic diagram of the scenario of the medium voltage holding control method for a train passing through a neutral section provided by the present application;

[0025] Figure 2A flow chart of a method for controlling the medium voltage maintenance of a train during phase separation provided in the present application;

[0026] Figure 3 A schematic diagram of the process of starting auxiliary load shedding control provided in this application;

[0027] Figure 4 A flow chart of another method for controlling medium voltage maintenance of a train during phase separation provided by the present application;

[0028] Figure 5 A schematic diagram of the structure of the medium voltage holding control device for train over-phase provided in this application;

[0029] Figure 6 This is a schematic diagram of the structure of the medium voltage maintenance control device for train over-phase provided in this application.

[0030] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0031] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0032] The phase separation area is an area in the railway power system used to isolate different power supply sections. The existing control logic of the train group over-phase separation is: when the train passes the phase separation at low speed, the medium voltage is not maintained, that is, the auxiliary converter stops working. At this time, the train has no AC380V medium voltage power supply, and the auxiliary loads all stop working. After the phase separation main circuit breaker is closed, the intermediate DC circuit of the traction converter is pre-charged first. After the intermediate DC voltage is established, the auxiliary converter is re-connected to the grid and started. After the AC380V medium voltage power supply is restored, the auxiliary loads such as the traction high-voltage cooling equipment start in time. After the traction high-voltage cooling system works normally, the traction conditions are met again. This process takes a long time. If the train is on a long and steep slope at this time, the idling deceleration is large. It takes a long time from entering the phase separation area to stop the traction output to the traction high-voltage cooling system working normally to meet the traction conditions (i.e., the traction recovery time). In addition, the initial speed is low when entering the phase separation, which easily leads to the situation that the train is forced to stop before the traction conditions are met.

[0033] The medium-voltage holding control method for train passing through neutral section provided by this application ensures that the traction converter is in the medium-voltage holding mode both when the train passes through the neutral section at low speed and high speed through the auxiliary load shedding control, which can effectively shorten the traction recovery time after the train exits the neutral section and avoid the situation of forced stop due to no traction output at too low speed.

[0034] Figure 1 It is a schematic diagram of the scenario of the medium-voltage holding control method for train passing through neutral section provided by this application. As Figure 1 shown, the specific application scenarios of this application include: the medium-voltage holding control device 101 for train passing through neutral section and the traction converter 102.

[0035] Specifically, the medium-voltage holding control device 101 for train passing through neutral section controls the control state of the traction converter 102 according to the medium-voltage holding control strategy for low-speed passing through neutral section or the medium-voltage holding control strategy for high-speed passing through neutral section.

[0036] Refer to Figure 1 , the communication interfaces related to passing through neutral section between the medium-voltage holding control device 101 for train passing through neutral section and the traction converter 102 are divided into a high-speed medium-voltage holding mode signal and a low-speed medium-voltage holding mode signal, and the communication interface design is as Figure 1 shown. The combination relationship of variables in the communication interface is shown in Table 1.

[0037] Table 1

[0038]

[0039] The following uses specific embodiments to elaborate in detail on the technical solution of this application and how the technical solution of this application solves the above technical problems. These several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will be described below in conjunction with the accompanying drawings.

[0040] Figure 2 It is a schematic flow chart of the medium-voltage holding control method for train passing through neutral section provided by this application. The execution subject of this embodiment can be Figure 1 the medium-voltage holding control device for train passing through neutral section shown in Figure 2 , and there is no special limitation here for this embodiment. As

[0041] shown, this method includes:

[0042] S201: During the process of the train to be controlled passing through the neutral section, obtain the first real-time speed of the train to be controlled.

[0043] Specifically, control the speed sensor to measure the first real-time speed of the train to be controlled in real time.S202: Determine the medium-voltage holding control strategy corresponding to the train to be controlled according to the first real-time speed. The medium-voltage holding control strategy includes a medium-voltage holding control strategy for passing neutral section at high speed and a medium-voltage holding control strategy for passing neutral section at low speed.

[0044] Specifically, S202 specifically includes S2021 to S2022:

[0045] S2021: If the first real-time speed is greater than the activation threshold of medium-voltage holding for passing neutral section at high speed, determine that the medium-voltage holding control strategy corresponding to the train to be controlled is the medium-voltage holding control strategy for passing neutral section at high speed.

[0046] S2022: If the first real-time speed is less than the activation threshold of medium-voltage holding for passing neutral section at high speed and greater than the activation threshold of medium-voltage holding for passing neutral section at low speed, determine that the medium-voltage holding control strategy corresponding to the train to be controlled is the medium-voltage holding control strategy for passing neutral section at low speed.

[0047] S203: If the medium-voltage holding control strategy corresponding to the train to be controlled is the medium-voltage holding control strategy for passing neutral section at low speed, start the auxiliary load shedding control. After the auxiliary load shedding control is successful, control the control state of the traction converter according to the medium-voltage holding control strategy for passing neutral section at low speed.

[0048] Among them, the auxiliary load shedding control can be to only allow the traction system cooling equipment and the main air compressor to start, and prohibit the start of other medium-voltage auxiliary loads such as air conditioners, on-board transformers, and water heaters.

[0049] Figure 3 It is a schematic flow chart of starting the auxiliary load shedding control provided by this application.

[0050] Reference Figure 3 , specifically, starting the auxiliary load shedding control specifically includes Sa to Si:

[0051] Sa: Receive the signal for starting the auxiliary load shedding control and start calculating the shutdown time.

[0052] Sb: Stop the power supply output of the air-conditioning load.

[0053] Sc: Stop the power supply output of the water heater load.

[0054] Sd: Stop the power supply output of the on-board transformer.

[0055] Se: Stop the power supply output of the kitchen transformer.

[0056] Sf: Determine whether the above-mentioned medium-voltage auxiliary loads all feedback shutdown; if it is determined that the above-mentioned medium-voltage auxiliary loads all feedback shutdown, execute Sg; if it is determined that at least one of the above-mentioned medium-voltage auxiliary loads does not feedback shutdown, execute Sh.

[0057] Sg: Generate an auxiliary load shedding success signal.

[0058] Sh: Determine whether the shutdown time exceeds the set shutdown time threshold; if it is determined that the shutdown time exceeds the set shutdown time threshold, then execute Si; if it is determined that the shutdown time does not exceed the set shutdown time threshold, then repeat step Sf.

[0059] Si: Generate an auxiliary load shedding failure signal.

[0060] Specifically, after the auxiliary load shedding control is successful, it specifically includes: determining that the auxiliary load shedding control is successful according to the auxiliary load shedding success signal.

[0061] Specifically, according to the low-speed neutral section passing medium voltage holding control strategy, controlling the control state of the traction converter specifically includes: controlling the traction converter to enter the low-speed medium voltage holding mode, so as to keep the auxiliary converter and traction-related cooling equipment working properly in the low-speed medium voltage holding mode.

[0062] Among them, the traction-related cooling equipment includes: traction transformer cooling equipment, traction converter cooling equipment, traction motor cooling equipment, etc.

[0063] S204: If the medium voltage holding control strategy corresponding to the train to be controlled is the high-speed neutral section passing medium voltage holding control strategy, then control the control state of the traction converter according to the high-speed neutral section passing medium voltage holding control strategy.

[0064] Specifically, controlling the control state of the traction converter according to the high-speed neutral section passing medium voltage holding control strategy specifically includes: controlling the traction converter to enter the high-speed medium voltage holding mode, so as to keep the auxiliary converter and medium voltage auxiliary load working properly in the high-speed medium voltage holding mode.

[0065] Among them, the medium voltage auxiliary load includes traction system cooling equipment and main air compressors.

[0066] The medium voltage holding control method for train passing through neutral section provided by the embodiments of the present application determines the medium voltage holding control strategy corresponding to the train to be controlled according to the first real-time speed of the train to be controlled; if the medium voltage holding control strategy is the low-speed neutral section passing medium voltage holding control strategy, then start the auxiliary load shedding control, and after the auxiliary load shedding control is successful, control the control state of the traction converter; if it is the high-speed neutral section passing medium voltage holding control strategy, then control the control state of the traction converter according to the high-speed neutral section passing medium voltage holding control strategy. It can ensure that the traction converter is in the medium voltage holding mode both when the train passes through the neutral section at low speed and high speed, effectively shortening the traction recovery time after the train exits the neutral section, and avoiding the situation that the train is forced to stop due to too low speed and no traction output.

[0067] In one embodiment of the present application, on the basis of the above embodiment, another implementation manner of step S203 is provided, which is described in detail as follows:

[0068] S2031: Control the traction converter to enter the low-speed medium-voltage holding mode, so as to keep the auxiliary converter and the traction-related cooling equipment working normally in the low-speed medium-voltage holding mode.

[0069] S2032: Obtain the second real-time speed of the train to be controlled.

[0070] S2033: If the second real-time speed is less than the low-speed neutral section passing medium-voltage holding exit threshold, control the traction converter to exit the low-speed medium-voltage holding mode.

[0071] Specifically, control the traction converter to exit the low-speed medium-voltage holding mode, control the auxiliary converter to stop working, and exit the auxiliary load shedding control.

[0072] The medium-voltage holding control method for train neutral section passing provided by the embodiment of the present application obtains the second real-time speed of the train to be controlled. If the second real-time speed is less than the low-speed neutral section passing medium-voltage holding exit threshold, control the traction converter to exit the low-speed medium-voltage holding mode. It can protect the equipment, prevent abnormal voltage damage to the equipment, and avoid mechanical stress damage; it can avoid potential safety hazards and ensure the stability of key systems; at the same time, it can optimize energy consumption.

[0073] In one embodiment of the present application, on the basis of the above embodiment, another implementation manner of step S204 is provided, which is described in detail as follows:

[0074] S2041: Control the traction converter to enter the high-speed medium-voltage holding mode, so as to keep the auxiliary converter and the medium-voltage auxiliary load working normally in the high-speed medium-voltage holding mode.

[0075] S2042: Obtain the third real-time speed of the train to be controlled.

[0076] S2043: If the third real-time speed is less than the auxiliary load shedding control activation threshold, start the auxiliary load shedding control.

[0077] Specifically, receive the start auxiliary load shedding control signal and start calculating the shutdown time; stop the power supply output of the air conditioner load; stop the power supply output of the water boiler load; stop the power supply output of the on-vehicle transformer; stop the power supply output of the kitchen transformer; determine whether all the above medium-voltage auxiliary loads feedback shutdown; if it is determined that all the above medium-voltage auxiliary loads feedback shutdown, generate an auxiliary load removal success signal; if it is determined that at least one of the above medium-voltage auxiliary loads does not feedback shutdown, determine whether the shutdown time exceeds the set shutdown time threshold; if it is determined that the shutdown time exceeds the set shutdown time threshold, generate an auxiliary load removal failure signal; if it is determined that the shutdown time does not exceed the set shutdown time threshold, repeat the step of "determine whether all the above medium-voltage auxiliary loads feedback shutdown".

[0078] It should be noted that the auxiliary load shedding control activation threshold is greater than the medium-voltage holding exit threshold during high-speed phase separation.

[0079] The medium-voltage holding control method for train phase separation provided by the embodiments of the present application can ensure that the traction converter is in the medium-voltage holding mode during both low-speed and high-speed phase separation of the train by starting the auxiliary load shedding control, effectively shortening the traction recovery time after the train exits the phase separation and avoiding the situation of forced stop due to no traction output at too low speed.

[0080] In an embodiment of the present application, on the basis of the above embodiment, after step S2043, it further includes the process of switching the traction converter to the low-speed medium-voltage holding mode, which is detailed as follows:

[0081] S2044: Obtain the fourth real-time speed of the train to be controlled.

[0082] It should be noted that each real-time speed is the real-time speed monitored under the current working condition.

[0083] S2045: If the fourth real-time speed is less than the high-speed phase separation medium-voltage holding exit threshold and greater than the low-speed phase separation medium-voltage holding activation threshold, switch the traction converter to the low-speed medium-voltage holding mode.

[0084] In an embodiment of the present application, on the basis of the above embodiment, it further includes the process of exiting the medium-voltage holding control mode, which is detailed as follows:

[0085] S205: Obtain the medium-voltage holding control working condition of the train to be controlled.

[0086] S206: When the medium-voltage holding control working condition meets the medium-voltage holding exit working condition, exit the medium-voltage holding control mode, where the medium-voltage holding exit working condition includes at least one of the train to be controlled leaving the phase separation zone and the main circuit breaker being closed, the real-time speed corresponding to the medium-voltage holding control working condition being less than the low-speed phase separation medium-voltage holding exit threshold, and the auxiliary load shedding control being unsuccessful.

[0087] Specifically, if the medium voltage holding control condition of the train to be controlled is that the train to be controlled leaves the neutral section and the main circuit breaker is closed, and the control state of the traction converter of the train to be controlled is controlled according to the medium voltage holding control strategy for passing the neutral section at low speed or the medium voltage holding control strategy for passing the neutral section at high speed, then the above control is stopped, and the auxiliary converter is controlled to maintain normal operation. If the medium voltage holding control condition of the train to be controlled is that the real-time speed corresponding to the medium voltage holding control condition is less than the medium voltage holding exit threshold for passing the neutral section at low speed, and the control state of the traction converter of the train to be controlled is according to the medium voltage holding control strategy for passing the neutral section at low speed, then the above control is stopped, the auxiliary converter is controlled to stop working, and the auxiliary load shedding control is exited. If the medium voltage holding control condition of the train to be controlled is that the auxiliary load shedding control is unsuccessful, and the control state of the traction converter of the train to be controlled is controlled according to the medium voltage holding control strategy for passing the neutral section at low speed or the medium voltage holding control strategy for passing the neutral section at high speed, then the above control is stopped.

[0088] Figure 4 It is a schematic flowchart of another medium voltage holding control method for a train passing through a neutral section provided by this application. The execution subject of this embodiment can be Figure 1 the medium voltage holding control device for a train passing through a neutral section shown in Figure 4 As shown in

[0089] S401: During the process of the train to be controlled passing through the neutral section, obtain the first real-time speed of the train to be controlled.

[0090] S402: Determine whether the first real-time speed is higher than the medium voltage holding activation threshold for passing the neutral section at high speed; if it is determined that the first real-time speed is higher than the medium voltage holding activation threshold for passing the neutral section at high speed, then execute S403 - S; if it is determined that the first real-time speed is not higher than the medium voltage holding activation threshold for passing the neutral section at high speed, then execute.

[0091] S403: Enter the medium voltage holding control mode, and control the traction converter in the high-speed medium voltage holding mode to keep the auxiliary converter and the medium voltage auxiliary load working normally in the high-speed medium voltage holding mode.

[0092] S404: Determine whether the train to be controlled meets the conditions of leaving the neutral section and the main circuit breaker being closed; if it is determined that the train to be controlled meets the conditions of leaving the neutral section and the main circuit breaker being closed, then execute S416; if it is determined that the train to be controlled does not meet the conditions of leaving the neutral section and the main circuit breaker being closed, then execute S405 - S406.

[0093] S405: Obtain the second real-time speed of the train to be controlled.

[0094] S406: Determine whether the second real-time speed is lower than the auxiliary load shedding control activation threshold; if it is determined that the second real-time speed is not lower than the auxiliary load shedding control activation threshold, then repeat the execution of S403; if it is determined that the second real-time speed is lower than the auxiliary load shedding control activation threshold, then execute S407 - S409.

[0095] S407: Activate the auxiliary load shedding control.

[0096] S408: Obtain the third real-time speed of the train to be controlled.

[0097] S409: Determine whether the third real-time speed is lower than the high-speed neutral section medium voltage holding exit threshold; if it is determined that the third real-time speed is lower than the high-speed neutral section medium voltage holding exit threshold, then execute S410; if it is determined that the third real-time speed is not lower than the high-speed neutral section medium voltage holding exit threshold, then repeat the execution of S403.

[0098] S410: Determine whether the third real-time speed is higher than the low-speed neutral section medium voltage holding activation threshold; if it is determined that the third real-time speed is higher than the low-speed neutral section medium voltage holding activation threshold, then execute S411; if it is determined that the third real-time speed is not higher than the low-speed neutral section medium voltage holding activation threshold, then execute S416.

[0099] S411: Determine whether the auxiliary load shedding control is successful; if it is determined that the auxiliary load shedding control is successful, then execute S412 - S413; if it is determined that the auxiliary load shedding control is not successful, then execute S416.

[0100] S412: Control the traction converter to enter the low-speed medium voltage holding mode so that, in the low-speed medium voltage holding mode, the auxiliary converter and the traction-related cooling equipment can operate normally.

[0101] S413: Determine whether the train to be controlled meets the conditions of leaving the neutral section and the main circuit breaker being closed; if it is determined that the train to be controlled meets the conditions of leaving the neutral section and the main circuit breaker being closed, then execute S416; if it is determined that the train to be controlled does not meet the conditions of leaving the neutral section and the main circuit breaker being closed, then execute S414 - S415.

[0102] S414: Obtain the fourth real-time speed of the train to be controlled.

[0103] S415: Determine whether the fourth real-time speed is higher than the low-speed neutral section medium voltage holding exit threshold; if it is determined that the fourth real-time speed is higher than the low-speed neutral section medium voltage holding exit threshold, then repeat the execution of S412; if it is determined that the fourth real-time speed is not higher than the low-speed neutral section medium voltage holding exit threshold, then execute S416.

[0104] S416: Exit the medium voltage holding control mode, and when the auxiliary load shedding control is enabled, exit the auxiliary load shedding control.

[0105] S417: Determine whether the first real-time speed is higher than the activation threshold for maintaining medium voltage during low-speed neutral section passing; if it is determined that the first real-time speed is higher than the activation threshold for maintaining medium voltage during low-speed neutral section passing, then execute S418 and S411 successively; if it is determined that the first real-time speed is not higher than the activation threshold for maintaining medium voltage during low-speed neutral section passing, then execute S419.

[0106] S418: Start the auxiliary load shedding control.

[0107] S419: Do not enter the medium voltage holding control mode.

[0108] The medium voltage holding control method for train neutral section passing provided by this application, through the auxiliary load shedding control, ensures that the traction converter is in the medium voltage holding mode both during low-speed and high-speed neutral section passing of the train, can effectively shorten the traction recovery time after the train exits the neutral section, and avoid the situation of forced stop due to no traction output at too low speed.

[0109] Figure 5 This is the structural schematic diagram of the medium voltage holding control device for train neutral section passing provided by this application, as Figure 5 shown, the medium voltage holding control device 50 for train neutral section passing provided in this embodiment includes: an acquisition module 501, a determination module 502, and a control module 503.

[0110] The acquisition module 501 is used to acquire the first real-time speed of the train to be controlled during the process of the train to be controlled passing through the neutral section.

[0111] The determination module 502 is used to determine the medium voltage holding control strategy corresponding to the train to be controlled according to the first real-time speed, where the medium voltage holding control strategy includes the medium voltage holding control strategy for high-speed neutral section passing and the medium voltage holding control strategy for low-speed neutral section passing.

[0112] The control module 503 is used to, if the medium voltage holding control strategy corresponding to the train to be controlled is the medium voltage holding control strategy for low-speed neutral section passing, start the auxiliary load shedding control, and after the auxiliary load shedding control is successful, control the control state of the traction converter according to the medium voltage holding control strategy for low-speed neutral section passing.

[0113] The control module 503 is further used to, if the medium voltage holding control strategy corresponding to the train to be controlled is the medium voltage holding control strategy for high-speed neutral section passing, control the control state of the traction converter according to the medium voltage holding control strategy for high-speed neutral section passing.

[0114] In a possible implementation, the determining module 502 is specifically configured to: if the first real-time speed is greater than the high-speed neutral section medium voltage holding activation threshold, determine that the medium voltage holding control strategy corresponding to the train to be controlled is the high-speed neutral section medium voltage holding control strategy; if the first real-time speed is less than the high-speed neutral section medium voltage holding activation threshold and greater than the low-speed neutral section medium voltage holding activation threshold, determine that the medium voltage holding control strategy corresponding to the train to be controlled is the low-speed neutral section medium voltage holding control strategy.

[0115] In a possible implementation, the control module 503 is specifically configured to: control the traction converter to enter the low-speed medium voltage holding mode, so as to keep the auxiliary converter and the traction-related cooling equipment operating normally in the low-speed medium voltage holding mode.

[0116] In a possible implementation, the control module 503 is further specifically configured to: obtain the second real-time speed of the train to be controlled; if the second real-time speed is less than the low-speed neutral section medium voltage holding exit threshold, control the traction converter to exit the low-speed medium voltage holding mode.

[0117] In a possible implementation, the control module 503 is specifically configured to: control the traction converter to enter the high-speed medium voltage holding mode, so as to keep the auxiliary converter and the medium voltage auxiliary load operating normally in the high-speed medium voltage holding mode.

[0118] In a possible implementation, the medium voltage holding control device 50 for train neutral section passing further includes:

[0119] A start module, configured to obtain the third real-time speed of the train to be controlled; if the third real-time speed is less than the auxiliary load shedding control activation threshold, start the auxiliary load shedding control.

[0120] In a possible implementation, the medium voltage holding control device 50 for train neutral section passing further includes:

[0121] A switching module, configured to obtain the fourth real-time speed of the train to be controlled; if the fourth real-time speed is less than the high-speed neutral section medium voltage holding exit threshold and greater than the low-speed neutral section medium voltage holding activation threshold, switch the traction converter to the low-speed medium voltage holding mode.

[0122] In a possible implementation, the medium voltage holding control device 50 for train neutral section passing further includes:

[0123] An exit module, configured to obtain the medium voltage holding control working condition of the train to be controlled;

[0124] When the medium voltage holding control condition meets the medium voltage holding exit condition, the medium voltage holding control mode is exited, where the medium voltage holding exit condition includes at least one of the train to be controlled leaving the neutral section and the main circuit breaker being closed, the real-time speed corresponding to the medium voltage holding control condition being less than the low-speed neutral section passing medium voltage holding exit threshold, and the auxiliary load shedding control being unsuccessful.

[0125] The medium voltage holding control device for train neutral section passing provided in this embodiment can execute the method provided in the above method embodiment, and its implementation principle and technical effects are similar, so details are not described here in this embodiment.

[0126] Figure 6 It is a schematic structural diagram of the medium voltage holding control device for train neutral section passing provided by this application. As Figure 6 shown, the medium voltage holding control device 60 for train neutral section passing provided in this embodiment includes: at least one processor 601 and a memory 602. Optionally, the device 60 further includes a communication component 603. Among them, the processor 601, the memory 602, and the communication component 603 are connected through a bus 604.

[0127] In the specific implementation process, at least one processor 601 executes the computer execution instructions stored in the memory 602, so that at least one processor 601 executes the above method.

[0128] The specific implementation process of the processor 601 can be referred to in the above method embodiment, and its implementation principle and technical effects are similar, so details are not described here again in this embodiment.

[0129] In the above embodiment, it should be understood that the processor may be a central processing unit (English: Central Processing Unit, abbreviated as: CPU), or other general-purpose processors, digital signal processors (English: Digital Signal Processor, abbreviated as: DSP), application specific integrated circuits (English: Application Specific Integrated Circuit, abbreviated as: ASIC), etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the invention can be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.

[0130] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (Non-volatile Memory, NVM), such as at least one disk memory.

[0131] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, the buses in the drawings of this application are not limited to only one bus or one type of bus.

[0132] This application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When the processor executes the computer-executable instructions, the above method is implemented.

[0133] This application also provides a computer program product, including a computer program, which implements the above method when executed by the processor.

[0134] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as a static random access memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), a magnetic memory, a flash memory, a magnetic disk or an optical disk. The readable storage medium can be any available medium accessible by a general-purpose or special-purpose computer.

[0135] An exemplary readable storage medium is coupled to the processor, enabling the processor to read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an Application Specific Integrated Circuit (ASIC). Of course, the processor and the readable storage medium can also exist as discrete components in a device.

[0136] The division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces, and the indirect coupling or communication connection of devices or units can be in an electrical, mechanical or other forms.

[0137] The unit described as a separation component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or may be distributed over multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0138] In addition, in each embodiment of the present application, each functional unit may be integrated in a processing unit, may exist physically separately for each unit, or two or more units may be integrated in one unit.

[0139] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0140] Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions. The foregoing program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps including the above method embodiments; and the foregoing storage medium includes: various media such as ROM, RAM, magnetic disks, or optical discs that can store program codes.

[0141] Finally, it should be noted that: After considering the specification and practicing the invention disclosed herein, those skilled in the art will easily think of other implementation schemes of the present application. The present application aims to cover any variations, uses, or adaptive changes of the present application. These variations, uses, or adaptive changes follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field not disclosed in the present application. It is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A method for controlling medium voltage maintenance of a train during phase separation, characterized in that: include: During the process of the train to be controlled passing through a phase, obtaining a first real-time speed of the train to be controlled; Determine, according to the first real-time speed, a medium voltage maintenance control strategy corresponding to the train to be controlled, wherein the medium voltage maintenance control strategy includes a high-speed over-phase medium voltage maintenance control strategy and a low-speed over-phase medium voltage maintenance control strategy; If the medium voltage maintenance control strategy corresponding to the train to be controlled is the low-speed over-phase medium voltage maintenance control strategy, the auxiliary load reduction control is started, and after the auxiliary load reduction control is successful, the control state of the traction converter is controlled according to the low-speed over-phase medium voltage maintenance control strategy; If the medium voltage maintenance control strategy corresponding to the train to be controlled is the high-speed over-phase medium voltage maintenance control strategy, the control state of the traction converter is controlled according to the high-speed over-phase medium voltage maintenance control strategy.

2. The method according to claim 1, characterized in that The determining, according to the first real-time speed, a medium voltage maintaining control strategy corresponding to the train to be controlled includes: If the first real-time speed is greater than the high-speed over-phase medium voltage maintenance activation threshold, determining that the medium voltage maintenance control strategy corresponding to the train to be controlled is the high-speed over-phase medium voltage maintenance control strategy; If the first real-time speed is less than the high-speed over-phase medium voltage maintenance activation threshold and greater than the low-speed over-phase medium voltage maintenance activation threshold, the medium voltage maintenance control strategy corresponding to the train to be controlled is determined to be the low-speed over-phase medium voltage maintenance control strategy.

3. The method according to claim 1, characterized in that The controlling of the control state of the traction converter according to the low-speed over-phase medium voltage maintenance control strategy includes: The traction converter is controlled to enter a low-speed medium-voltage holding mode, so as to maintain normal operation of the auxiliary converter and traction-related cooling equipment in the low-speed medium-voltage holding mode.

4. The method according to claim 3, characterized in that After controlling the traction converter to enter the low-speed medium-voltage holding mode, the method further includes: Acquiring a second real-time speed of the train to be controlled; If the second real-time speed is less than the low-speed excessive phase medium voltage maintenance exit threshold, the traction converter is controlled to exit the low-speed medium voltage maintenance mode.

5. The method according to any one of claims 2 to 4, characterized in that: The controlling of the control state of the traction converter according to the high-speed over-phase medium voltage maintenance control strategy includes: The traction converter is controlled to enter a high-speed medium-voltage holding mode, so as to maintain normal operation of the auxiliary converter and the medium-voltage auxiliary load in the high-speed medium-voltage holding mode.

6. The method according to claim 5, characterized in that After controlling the traction converter to enter the high-speed medium-voltage holding mode, the method further includes: Acquiring a third real-time speed of the train to be controlled; If the third real-time speed is less than the auxiliary load shedding control activation threshold, the auxiliary load shedding control is initiated.

7. The method according to claim 5, characterized in that After controlling the traction converter to enter the high-speed medium-voltage holding mode, the method further includes: Acquiring a fourth real-time speed of the train to be controlled; If the fourth real-time speed is less than the high-speed over-phase medium voltage maintenance exit threshold and greater than the low-speed over-phase medium voltage maintenance activation threshold, the traction converter is switched to the low-speed medium voltage maintenance mode.

8. The method according to any one of claims 1 to 4, characterized in that: Also includes: Acquiring a medium voltage maintenance control condition of the train to be controlled; When the medium voltage maintenance control condition satisfies the medium voltage maintenance exit condition, the medium voltage maintenance control mode is exited, wherein the medium voltage maintenance exit condition includes at least one of the following: the train to be controlled leaves the phase separation area and the main circuit breaker is closed, the real-time speed corresponding to the medium voltage maintenance control condition is less than the low-speed over-phase medium voltage maintenance exit threshold, and the auxiliary load unloading control is unsuccessful.

9. A medium voltage maintenance control device for train over-phase, characterized in that: include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the medium voltage maintenance control method for train over-phase according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the medium voltage maintenance control method for a train passing through phases as described in any one of claims 1 to 8.

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