WO2020119125A1 - Redundancy control method and system for locomotive high-voltage system - Google Patents

Abstract

A redundancy control method and system for a locomotive high-voltage system. The method comprises: obtaining pantograph fault information and/or vacuum main circuit breaker fault information; performing a switching operation on a high-voltage conversion contactor according to the pantograph fault information and/or the vacuum main circuit breaker fault information, so that a pantograph and/or a vacuum main circuit breaker having no fault occurring are put into operation to form a high-voltage current path together with a transformer, thereby avoiding the problem of breakdown of a locomotive because a high-voltage current path cannot be formed when each locomotive has only one vacuum main circuit breaker and a fault occurs to the vacuum main circuit breaker. If pantograph fault information is obtained, a switching operation is performed on a catenary voltage conversion relay according to the pantograph fault information, so that a normally operating pantograph, a voltage transformer, and the catenary voltage conversion relay are closed at a contact on a pantograph side having no fault occurring to form a current path, and catenary voltage information can be obtained normally.

Description

Redundant control method and system of locomotive high voltage system Technical field

The invention relates to a locomotive high-voltage system control method, in particular to a locomotive high-voltage system redundancy control method and system.

Background technique

The locomotive high-voltage system is mainly used to connect the high voltage electricity of the bow net into the main circuit system of the locomotive to provide power for the locomotive, and at the same time feed back the high-voltage electricity generated by the main circuit system under the electric system of the locomotive to the bow net to form a high-voltage electricity Recycling. The locomotive high-voltage system is mainly composed of pantograph, vacuum main circuit breaker, high-voltage isolating switch, high-voltage voltage transformer and so on.

In the prior art, each locomotive has two pantographs, which are respectively installed at the front and rear ends of the locomotive roof. Each locomotive has a vacuum main circuit breaker. When the pantograph installed at the front or rear end of the locomotive roof is raised and the vacuum main circuit breaker is closed, the pantograph and the locomotive main circuit are connected to form a high-voltage current path. The high-voltage voltage transformer can receive the voltage signal of the pantograph through the pantograph. Each locomotive has two high-voltage isolation switches, each high-voltage isolation switch corresponding to a pantograph, when the high-voltage isolation switch is in the isolation position, the corresponding pantograph cannot be raised. The two pantographs share a vacuum main circuit breaker, and any one of the pantographs can be connected to the vacuum main circuit breaker to achieve a high-voltage current path. Two pantographs realize the redundancy of the locomotive high voltage system.

However, with the existing technology, each locomotive has one and only one vacuum main circuit breaker. When the vacuum main circuit breaker fails, a high-voltage current path cannot be formed, causing the locomotive to break.

Summary of the invention

Embodiments of the present invention provide a redundant control method and system for a high-voltage system of a locomotive, which solves the existing technology. Each locomotive has one and only one vacuum main circuit breaker. When the vacuum main circuit breaker fails, a high-voltage current path cannot be formed. Cause the problem of locomotive breaking.

In a first aspect, this embodiment of a locomotive high-voltage system redundancy control method is characterized in that it is applied to a locomotive high-voltage redundant circuit. The locomotive high-voltage redundant circuit includes: a first pantograph, a second pantograph, High-voltage switching contactor, first vacuum main circuit breaker, second vacuum main circuit breaker, transformer, first high-voltage transformer, second high-voltage transformer and grid voltage switching relay, the high-voltage switching contactor and the first Pantograph, the second pantograph, the first vacuum main circuit breaker, the second vacuum main circuit breaker are connected, the high-voltage conversion contactor is also the first high-voltage transformer, the first Two high-voltage transformers are connected, the transformer is respectively connected to the first vacuum main circuit breaker and the second vacuum main circuit breaker, the first high-voltage transformer and the second high-voltage transformer are also connected to the grid Voltage conversion relay connection; the method includes:

Obtain pantograph failure information and/or vacuum main circuit breaker failure information, the pantograph failure information is used to indicate a failed pantograph, and the vacuum main breaker failure information is used to indicate a failed vacuum main circuit breaker Device

According to the pantograph failure information and/or the vacuum main circuit breaker failure information, performing conversion operation on the high-voltage conversion contactor under a first preset condition;

If the pantograph failure information is obtained, the network voltage conversion relay is switched under the second preset condition according to the pantograph failure information.

In a possible design, the acquiring pantograph failure information includes:

After the pantograph relay is energized, it is determined whether the pantograph is raised within the first preset duration, if not, it is determined that the pantograph has a bow-raising failure, and the number of times the bow-raising failure is greater than Acquiring the pantograph failure information at the first preset number of times; or

After the pantograph relay is de-energized, it is determined whether the pantograph falling time exceeds the second preset duration, and if so, it is determined that the pantograph has a bow-down failure and the pantograph failure information is obtained. In a possible design, the acquiring the fault information of the vacuum main circuit breaker includes:

After the vacuum main circuit breaker relay is energized, it is determined whether the time period from opening to closing of the vacuum main circuit breaker is greater than the third preset time period, and if so, it is determined that the vacuum main circuit breaker has a closing vacuum main circuit breaker failure. When the number of failures of the main vacuum circuit breaker is greater than the second preset number, obtain the fault information of the vacuum main circuit breaker; or

After the vacuum main circuit breaker relay is de-energized, it is determined whether the time period from closing to opening of the vacuum main circuit breaker is greater than the fourth preset time period, and if so, it is determined that the vacuum main circuit breaker has broken and the vacuum main circuit breaker has failed, and Obtain the fault information of the vacuum main circuit breaker.

In a possible design, the high-voltage switching contactor includes: a first working contactor, a second working contactor, and a redundant contactor; the first working contactor and the first pantograph and The first vacuum main circuit breaker is connected, the second working contactor is respectively connected to the second pantograph and the second vacuum main circuit breaker; the redundant contactor is respectively connected to the first working contactor Connect with the second working contactor. In a possible design, the mode of the pantograph is divided into a single bow mode and a double bow mode, and the mode of the pantograph can be switched under the third preset condition.

In a possible design, if the pantograph mode is a single bow mode;

The single bow mode is divided into a front bow mode, a rear bow mode, and an automatic mode, respectively corresponding to the first pantograph, the second pantograph, and the pantograph away from the main control end.

In the front bow mode, the first pantograph is raised. If the first pantograph fails, according to the fault information of the first pantograph, manually switch to the second pantograph to raise.

In the rear bow mode, the second pantograph is raised. If the second pantograph fails, according to the fault information of the second pantograph, manually switch to the first pantograph to raise.

In automatic mode, the pantograph is raised away from the main control end. If the pantograph far away from the main control end fails, it will automatically switch to the pantograph close to the main control end according to the fault information of the pantograph away from the main control end.

In a possible design, if the pantograph mode is a single bow mode;

If pantograph failure information is obtained, and the pantograph failure information is used to indicate a failure of the first pantograph, the conversion operation of the high-voltage conversion contactor according to the pantograph failure information includes:

According to the pantograph failure information, the first working contactor and the redundant contactor are controlled to open, and the second working contactor is controlled to be closed.

If the pantograph failure information is obtained, switching the grid voltage conversion relay according to the pantograph failure information includes:

According to the pantograph failure information, the contact of the grid voltage conversion relay is controlled to switch to the side of the second pantograph.

In a possible design, if the pantograph mode is a single bow mode;

If pantograph failure information and vacuum main circuit breaker failure information are obtained, the pantograph failure information is used to indicate a failure of the first pantograph, and the vacuum main breaker failure information is used to indicate the first vacuum main circuit breaker If the relay fails, the conversion operation of the high-voltage conversion contactor according to the pantograph failure information includes:

According to the pantograph failure information and the vacuum main circuit breaker failure information, control the first working contactor to open and the redundant contactor to open, and the second working contactor to close;

If the pantograph failure information is obtained, switching the grid voltage conversion relay according to the pantograph failure information includes:

According to the pantograph failure information, the contact of the grid voltage conversion relay is controlled to switch to the side of the second pantograph.

In a possible design, if the pantograph mode is a double bow mode;

If the main control terminal of the locomotive changes, the information of the main control terminal of the locomotive is used to indicate that the first pantograph approaches the direction of the main control terminal of the locomotive, and then the high-voltage conversion contactor is converted according to the information of the main control terminal of the locomotive, including :

Then, according to the information of the main control terminal of the locomotive, the second working contactor is controlled to be closed, and the redundant contactor is disconnected from the first working contactor;

If the main control terminal information of the locomotive is obtained, the contact of the grid voltage conversion relay on the side of the second pantograph and the contact of the first pantograph on the side of the first pantograph are controlled according to the information on the main control terminal of the locomotive The contact is open.

In a possible design, if the pantograph mode is a double bow mode;

If the vacuum main circuit breaker failure information is obtained, and the vacuum main circuit breaker failure information is used to indicate a failure of the first vacuum main circuit breaker, the high-voltage conversion contactor is converted according to the vacuum main circuit breaker failure information Operations, including:

According to the fault information of the vacuum main circuit breaker, the redundant contactor and the first working contactor are controlled to be opened, and the second working contactor is closed;

If the fault information of the vacuum main circuit breaker is obtained, switching the grid voltage conversion relay according to the fault information of the vacuum main circuit breaker includes:

According to the fault information of the vacuum main circuit breaker, the contact of the grid voltage conversion relay on the side of the second pantograph is controlled, and the contact on the side of the first pantograph is opened. In a second aspect, this embodiment provides a locomotive high-voltage system redundancy control system, including: a control device and a locomotive high-voltage redundancy circuit. The locomotive high-voltage redundancy circuit includes: a first pantograph, a second pantograph, High-voltage switching contactor, first vacuum main circuit breaker, second vacuum main circuit breaker, transformer, first high-voltage transformer, second high-voltage transformer and grid voltage switching relay, the high-voltage switching contactor and the first The pantograph, the second pantograph, the first vacuum main circuit breaker, and the second vacuum main circuit breaker are connected, and the high-voltage conversion contactor is also connected to the first high-voltage transformer and the A second high-voltage transformer is connected, the transformer is respectively connected to the first vacuum main circuit breaker and the second vacuum main circuit breaker, the first high-voltage transformer and the second high-voltage transformer are also connected to the The network voltage conversion relay is connected; the control device is connected to the high voltage conversion contactor and the network voltage conversion relay respectively;

The control device is used to execute the method according to any one of the first aspects.

This embodiment provides a locomotive high-voltage system redundancy control method and system. The method includes: acquiring pantograph failure information and/or vacuum main circuit breaker failure information. The pantograph failure information is used to indicate a failed pantograph , The vacuum main circuit breaker fault information is used to indicate the faulty vacuum main circuit breaker; according to the pantograph fault information and/or the vacuum main circuit breaker fault information, the high voltage conversion contactor is satisfied under the first preset condition Perform the conversion operation to put the pantograph and/or vacuum main circuit breaker that have not failed into operation, and form a high-voltage current path together with the transformer, to avoid that each locomotive has only one vacuum main circuit breaker. When the vacuum main circuit breaker fails At this time, the high-voltage current path cannot be formed, causing the problem of locomotive breakdown. If the pantograph fault information is obtained, the grid voltage conversion relay is switched under the second preset condition according to the pantograph fault information, so that the pantograph and voltage transformer that work normally The contact with the network voltage conversion relay on the side of the pantograph that has not failed is closed to form a current path, and the network voltage information can be obtained normally.

BRIEF DESCRIPTION

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings used in the description of the embodiments or the prior art. Obviously, the drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, without paying any creative labor, other drawings can be obtained based on these drawings.

1 is a structural diagram of a locomotive high-voltage redundant circuit provided by an embodiment of the present invention;

2 is a first schematic flowchart of a redundant control method for a high-voltage system of a locomotive provided by an embodiment of the present invention;

FIG. 3 is a first schematic flowchart of a pantograph failure processing process provided by an embodiment of the present invention;

4 is a second schematic flowchart of a pantograph failure processing process provided by an embodiment of the present invention;

FIG. 5 is a first schematic flowchart of a fault handling process of a vacuum main circuit breaker provided by an embodiment of the present invention;

6 is a second schematic flowchart of a fault handling process of a vacuum main circuit breaker provided by an embodiment of the present invention;

7 is a schematic flowchart of a conversion process of a high-voltage conversion contactor provided by an embodiment of the present invention;

8 is a second schematic flowchart of a redundant control method for a high-voltage system of a locomotive provided by an embodiment of the present invention;

9 is a third schematic flowchart of a redundant control method for a high-voltage system of a locomotive provided by an embodiment of the present invention;

10 is a schematic diagram of a redundant control system for a high-voltage system of a locomotive provided by an embodiment of the present invention.

detailed description

To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

1 is a structural diagram of a locomotive high-voltage redundant circuit provided by an embodiment of the present invention. As shown in FIG. 1, the locomotive high-voltage redundant circuit provided by an embodiment of the present invention includes: a first pantograph 101, a second pantograph 102, The high-voltage conversion contactor 103, the first vacuum main circuit breaker 104, the second vacuum main circuit breaker 105, the transformer 106, the first high-voltage transformer 107, the second high-voltage transformer 108, and the grid voltage conversion relay 109.

Among them, the high-voltage switching contactor 103 is respectively connected to the first pantograph 101, the second pantograph 102, the first vacuum main circuit breaker 104, and the second vacuum main circuit breaker 105, and the high-voltage switching contactor 103 is also the first high-voltage The transformer connection 107 and the second high voltage transformer 108 are connected. The transformer 106 is connected to the first vacuum main circuit breaker 104 and the second vacuum main circuit breaker 105 respectively. The first high voltage transformer 107 and the second high voltage transformer 108 are also connected to The grid voltage conversion relay 109 is connected.

Optionally, the high-voltage switching contactor 103 includes a first working contactor 1031, a second working contactor 1032 and a redundant contactor 1033; the first working contactor 1031 is disconnected from the first pantograph 101 and the first vacuum main respectively The contactor 104 is connected, and the second working contactor 1032 is connected to the second pantograph 102 and the second vacuum main circuit breaker 105 respectively; the redundant contactor 1033 is connected to the first working contactor 101 and the second working contactor 1032, respectively.

Optionally, the first pantograph and the second pantograph are located at the front and rear of the locomotive, respectively. The first pantograph and the second pantograph can be in contact with the high-voltage power grid near the railway to transmit the grid power to the locomotive on.

Optionally, the vacuum main circuit breaker is mainly used for arc extinguishing. The arc extinguishing medium of the vacuum main circuit breaker and the insulating medium of the contact gap after the arc extinguishing are all high vacuum media. It has the advantage of no maintenance for arc extinguishment, which is used to control and protect high-voltage electrical equipment of locomotives.

Optionally, the voltage transformer and transformer are used together to transform the grid voltage. The grid voltage transformed by the transformer can transmit electric energy for the locomotive, which is generally kilovolt-ampere or mega-volt-ampere; The protection of valuable equipment, motors and transformers in the line when the system line fails, generally has a few volts, tens of volts, and the maximum is not more than one thousand volts.

Optionally, the grid voltage conversion relay may receive the grid voltage information of the first pantograph or the second pantograph.

An embodiment of the present invention also provides a high-voltage system redundancy control method, which is implemented based on the locomotive high-voltage redundancy circuit provided in the embodiment of FIG. 1. The embodiment of the present invention will also be described in detail below in conjunction with FIG. 2.

FIG. 2 is a first schematic flowchart of a redundant control method for a locomotive high-voltage system according to an embodiment of the present invention. As shown in FIG. 2, the method includes:

S201. Obtain pantograph failure information and/or vacuum main circuit breaker failure information. The pantograph failure information is used to indicate a failed pantograph, and the vacuum main circuit breaker failure information is used to indicate a failed vacuum main circuit breaker.

Optionally, the pantograph failure information includes pantograph raising bow failure information and pantograph bow failure information, and the vacuum main circuit breaker failure information includes closing vacuum main circuit breaker failure information and vacuum breaking main circuit breaker failure information. information. The pantograph failure information is used to indicate the failed pantograph and isolate the failed pantograph. The fault information of the vacuum main circuit breaker is used to indicate the faulty vacuum main circuit breaker and isolate the faulty vacuum main circuit breaker.

S202. Perform conversion operation on the high-voltage conversion contactor under the first preset condition according to pantograph failure information and/or the vacuum main circuit breaker failure information.

Optionally, the high-voltage conversion contactor can be converted according to actual needs, but the conversion of the high-voltage conversion contactor must satisfy the first preset condition, including that the first pantograph and/or the second pantograph are in the rising state. Starting state, the first working contactor, the second working contactor and the redundant contactor of the high-voltage switching contactor are not all isolated.

Optionally, the pantograph must meet the conditions for pantograph raising, including normal pantograph corresponding to pantograph mode, valid electric key signal, normal main circuit, pantograph gas path conduction, and bow wind The cylinder pressure is normal.

Optionally, the closing of the vacuum main circuit breaker must meet the closing conditions of the vacuum main circuit breaker, including the normal vacuum main circuit breaker corresponding to the closed branch in the high-voltage conversion contactor, the valid electric key signal, the normal main circuit, and the vacuum main circuit breaker gas circuit. Conduction, the first pantograph and/or the second pantograph are in the raised state, the grid voltage value is normal, the sub-device sends permission to close the vacuum main circuit breaker, etc.

Optionally, after obtaining pantograph failure information and/or vacuum main circuit breaker failure information, control the first working contactor of the high-voltage conversion contactor according to the pantograph failure information and/or vacuum main circuit breaker failure information, The second working contactor and the redundant contactor are switched on and off to realize the conversion operation of the high-voltage conversion contactor, so that the pantograph and/or vacuum main circuit breaker that has not failed are put into operation, so that the normal working pantograph and The vacuum main circuit breaker can form a high-voltage current path with the transformer by switching through the high-voltage conversion contactor to provide high-voltage electricity for the entire vehicle.

S203. If the pantograph failure information is obtained, switch the network voltage conversion relay under the second preset condition according to the pantograph failure information.

Optionally, the grid voltage conversion relay can be converted according to actual needs, but the grid voltage conversion relay must be converted to meet the second preset condition, including the first pantograph and/or the second pantograph being in the rising Up state.

Optionally, if pantograph failure information is obtained, according to the pantograph failure information, the contacts of the pantograph switching relay on the side of the pantograph where the fault occurred are disconnected, and the The contacts on one side of the pantograph are closed to realize the conversion operation of the high-voltage conversion contactor, so that the pantograph without faults can work normally, so that the normal working pantograph, voltage transformer and grid voltage conversion relay do not occur The contact on one side of the pantograph of the fault is closed to form a current path, and the network voltage information is normally obtained, and the network voltage information includes voltage, frequency, etc.

The locomotive high-voltage system redundancy control method provided in this embodiment takes pantograph failure information and/or vacuum main circuit breaker failure information. The pantograph failure information is used to indicate a failed pantograph and vacuum main circuit breaker failure information. Vacuum main circuit breaker for indicating a fault; according to pantograph fault information and/or the vacuum main circuit breaker fault information, the high-voltage switching contactor is converted under the first preset condition so that it does not occur The failed pantograph and/or vacuum main circuit breaker are put into operation, forming a high-voltage current path together with the transformer, avoiding that each locomotive has only one vacuum main circuit breaker, and when the vacuum main circuit breaker fails, high-voltage current cannot be formed Access, causing locomotive breakdown. If the pantograph fault information is obtained, the grid voltage conversion relay is switched under the second preset condition according to the pantograph fault information, so that the pantograph and voltage transformer that work normally The contact with the network voltage conversion relay on the side of the pantograph that has not failed is closed to form a current path, and the network voltage information can be obtained normally.

In the following, with reference to FIGS. 3 and 4, the pantograph failure information described in step S201 of the embodiment of FIG. 2 is obtained, and the pantograph failure information is used to indicate the pantograph in which failure occurs. FIG. 3 is a first schematic flowchart of a pantograph failure processing process provided by an embodiment of the present invention. As shown in FIG. 3, the process includes:

S301. Determine that the pantograph raising relay is energized;

S302. Determine whether the pantograph is raised within the first preset duration; if so, execute S303; if not, execute S304;

S303. Determine that the pantograph raises the bow normally;

S304. Determine that a pantograph raising failure occurs in the pantograph, and isolate the faulty pantograph;

S305. Determine whether the number of times the bow is raised is greater than the first preset number of times; if yes, execute S307; if not, execute S306;

S306. Send an isolation pantograph recovery instruction to the faulty pantograph to recover the faulty pantograph;

S307. Obtain pantograph failure information;

S308. Isolate the failed pantograph, and the isolation cannot be lifted.

FIG. 4 is a second schematic flowchart of a pantograph failure processing process provided by an embodiment of the present invention. As shown in FIG. 4, the process includes:

S401. Determine that the pantograph lift relay is de-energized;

S402. Determine whether the pantograph falling time exceeds the second preset duration; if not, execute S403, and if yes, execute S404;

S403. Determine that the pantograph normally lowers the bow;

S404. Determine that the pantograph has a bow-down failure, and obtain pantograph failure information;

S405. Isolate the failed pantograph, and the isolation cannot be released.

S406. Disconnect and isolate the working contactor on the pantograph side of the fault, and the isolation cannot be released.

The pantograph failure handling process provided in this embodiment divides the pantograph failure into two types: bow raising failure and bow falling failure. The pantograph bow raising failure is a minor failure, and does not exceed the first preset number of times , You can usually send the isolated pantograph recovery command to the pantograph that has failed by the way of lowering the pantograph key or the fault recovery button to recover the faulty pantograph. The pantograph bow failure is a serious fault, and the isolated pantograph cannot be recovered.

The pantograph fault handling process provided in this embodiment details the pantograph's fault types, and proposes that the pantograph's bow-raising fault is a minor recoverable fault, which improves the redundancy of the locomotive's high-voltage equipment; it also proposes The bow-down failure of the pantograph is a serious failure, which ensures the safety of the high-voltage equipment of the locomotive.

In the following, with reference to FIGS. 5 and 6, the vacuum main circuit breaker fault information described in step S201 of the embodiment of FIG. 2 is obtained, and the vacuum main circuit breaker fault information is used to indicate the faulty vacuum main circuit breaker in detail.

FIG. 5 is a first schematic flowchart of a fault handling process of a vacuum main circuit breaker provided by an embodiment of the present invention. As shown in FIG. 5, the process includes:

S501. Determine that the vacuum main circuit breaker relay is energized;

S502. Determine whether the duration from opening to closing of the vacuum main circuit breaker is greater than the third preset duration; if not, execute S503; if yes, execute S504;

S503. Determine that the vacuum main circuit breaker is normally closed;

S504, it is determined that the vacuum main circuit breaker has a closing vacuum main circuit breaker failure, and the faulty vacuum main circuit breaker is disconnected;

S505, judging whether the number of times that the vacuum main circuit breaker has failed is greater than the second preset number; if yes, execute S507; if not, execute S506;

S506. Send a recovery instruction of the isolated vacuum main circuit breaker to the faulty vacuum main circuit breaker to recover the faulty vacuum main circuit breaker;

S507. Obtain the fault information of the vacuum main circuit breaker;

S508. Isolate the faulty vacuum main circuit breaker, and the isolation cannot be released.

FIG. 6 is a second schematic flowchart of a vacuum main circuit breaker fault handling process provided by an embodiment of the present invention. As shown in FIG. 6, the process includes:

S601. Determine that the vacuum main circuit breaker relay is de-energized;

S602. Determine whether the duration from closing to opening of the vacuum main circuit breaker is greater than the fourth preset duration; if not, execute S603, and if yes, execute S604;

S603. Determine that the vacuum main circuit breaker is normally disconnected;

S604. It is determined that the vacuum main circuit breaker breaks down, and the vacuum main circuit breaker failure information is obtained;

S605. Isolate the faulty vacuum main circuit breaker, and the isolation cannot be released.

S606. Disconnect and isolate the working contactor and redundant contactor on the side of the faulty vacuum main circuit breaker, and the isolation cannot be released.

The vacuum main circuit breaker fault handling process provided in this embodiment divides the vacuum main circuit breaker fault into two types: closing vacuum main circuit breaker fault and breaking vacuum main circuit breaker fault. The closing vacuum main circuit breaker fault is a minor fault and needs to be The vacuum main circuit breaker is disconnected. When the second preset number of times is not exceeded, the vacuum main circuit breaker recovery command can be sent to the faulty vacuum main circuit breaker by breaking the vacuum main circuit breaker toggle key or the fault recovery button. To restore the faulty vacuum main circuit breaker. The vacuum main circuit breaker is a serious fault. The faulty vacuum main circuit breaker needs to be disconnected and the corresponding pantograph is isolated and lowered. The isolated vacuum main circuit breaker cannot be recovered.

The fault handling process of the vacuum main circuit breaker provided in this embodiment divides the fault type of the vacuum main circuit breaker in detail, and proposes that the fault of the vacuum main circuit breaker is a minor recoverable fault, and only needs to disconnect the faulty vacuum main circuit Isolation of the locomotive improves the redundancy of the high-voltage equipment of the locomotive; at the same time, it is proposed that the main vacuum circuit breaker is broken. The fault of the main vacuum circuit breaker is a serious fault. , And the redundancy of the high-voltage equipment of the locomotive is guaranteed.

The step S202 of the embodiment in FIG. 2 will be described in detail below in conjunction with specific embodiments. 7 is a schematic flowchart of a conversion processing process of a high-voltage conversion contactor according to an embodiment of the present invention. As shown in FIG. 7, the process includes:

S701. Determine that the pantograph mode is a single bow mode.

Optionally, the pantograph modes are divided into single bow mode and double bow mode, and the single bow mode is divided into front bow mode, rear bow mode, and automatic mode, corresponding to the first pantograph, the second pantograph, and the away The pantograph of the main control end is raised, and the double-bow mode corresponds to the first pantograph and the second pantograph being raised. The pantograph away from the main control end is determined by the position of the main control end. If the first pantograph is closer to the main control end than the second pantograph, the pantograph away from the main control end is the first Two pantographs. On the contrary, the pantograph away from the main control end is the first pantograph.

Optionally, the mode of the pantograph can be switched according to actual needs, but the mode of the pantograph must be switched to meet the third preset condition, including that the locomotive is in a stationary state and the high-voltage equipment is in a disconnected state.

Specifically, in the front bow mode, the first pantograph is raised. If the first pantograph fails, manually switch to other pantograph modes according to the fault information of the first pantograph, otherwise the pantograph cannot be raised. In the rear bow mode, the second pantograph is raised. If the second pantograph fails, according to the fault information of the second pantograph, manually switch to other pantograph modes, otherwise the pantograph cannot be raised.

In automatic mode, the pantograph that is far away from the main control end of the train is raised. If the pantograph far from the main control end of the locomotive fails, the pantograph of the main control end of the switching locomotive is raised according to the fault information of the pantograph.

In the duplex mode, the two pantographs are raised. If the first pantograph is close to the main control end of the locomotive, the first pantograph is raised for ice scraping, the second pantograph is raised, and the second vacuum master The circuit breaker is closed and the second working contactor is closed for contact with the high-voltage power grid at the railway side to transfer the grid power to the locomotive; if the second pantograph is close to the main control end of the locomotive, the second pantograph is raised for scraping In ice, the first pantograph is raised, the first vacuum main circuit breaker is closed and the first working contactor is closed for contact with the high-voltage power grid at the railway side, and the grid power is transmitted to the locomotive. Specifically, in this embodiment, the pantograph mode is a single bow mode, that is, the first pantograph is raised, the grid voltage conversion relay contacts on the side of the first pantograph, and the first vacuum master The circuit breaker is closed and the first working contactor is closed, forming a high-voltage current path.

Optionally, in this embodiment, the pantograph mode is a single pantograph mode, or the second pantograph is raised, and the grid voltage conversion relay contacts on the side of the second pantograph. The second vacuum main circuit breaker is closed, and the second working contactor is closed, forming a high-voltage current path.

S702, pantograph failure information is obtained, and the pantograph failure information is used to indicate that the first pantograph fails.

Here, the failure of the first pantograph will be described as an example. S702 provided in this embodiment is similar to the embodiments of FIG. 3 and FIG. 4 and will not be repeated here.

Optionally, if the single bow mode of the pantograph is that the second pantograph is raised, the pantograph failure information is used to indicate that the second pantograph has failed.

S703: According to the pantograph failure information, control the first working contactor and the redundant contactor to open, and control the second working contactor to close.

Specifically, the first working contactor and the redundant contactor are controlled to be opened, and the second working contactor is controlled to be closed, so that the second pantograph is put into operation, forming a high-voltage current path.

Optionally, if the pantograph failure information is used to indicate a failure of the second pantograph, the second working contactor and the redundant contactor are controlled to open, and the first working contactor is controlled to be closed, so that the first pantograph Put into work to form a high-voltage current path.

The conversion process of the high-voltage conversion contactor provided by the embodiment of the present invention determines that the pantograph mode is a single-bow mode, the first pantograph is raised, and pantograph failure information is obtained. The pantograph failure information is used to indicate the first If a pantograph fails, according to the pantograph fault information, the first working contactor and the redundant contactor are controlled to open, and the second working contactor is controlled to close, so that the second pantograph is put into operation, forming a high-voltage current path, The problem that the first pantograph fails to form a high-voltage current path is avoided.

The conversion process of the high-voltage conversion contactor provided by the embodiment of the present invention determines that the pantograph mode is a single-bow mode, the second pantograph is raised, and pantograph failure information is obtained. The pantograph failure information is used to indicate the first The second pantograph fails, and according to the pantograph fault information, the second working contactor and the redundant contactor are controlled to open, and the first working contactor is controlled to close, so that the first pantograph is put into operation, forming a high-voltage current path. The problem that the second pantograph fails to form a high-voltage current path is avoided.

In the following, in conjunction with specific embodiments, the pantograph mode is the single-bow mode, and the process of handling the failure of the pantograph and the vacuum main circuit breaker will be described in detail. FIG. 8 is a second schematic flowchart of a redundant control method for a locomotive high-voltage system according to an embodiment of the present invention. As shown in FIG. 8, the process includes:

S801. Determine that the pantograph mode is a single bow mode.

S801 provided in this embodiment is similar to S701 provided in the embodiment of FIG. 7 and will not be repeated here.

S802: Obtain pantograph failure information and vacuum main circuit breaker failure information. The pantograph failure information is used to indicate a failure of the first pantograph, and the vacuum main circuit breaker failure information is used to indicate a failure of the first vacuum main circuit breaker.

The S802 provided in this embodiment is similar to the S201 provided in the embodiment of FIG. 2 and will not be repeated here.

Optionally, obtain pantograph failure information and vacuum main circuit breaker failure information, pantograph failure information is used to indicate the first pantograph failure, vacuum main circuit breaker failure information can be used to indicate the second vacuum main circuit breaker malfunction.

Optionally, the pantograph fault information and the vacuum main circuit breaker fault information are obtained, the pantograph fault information is used to indicate that the second pantograph can fail, and the vacuum main circuit breaker fault information is used to indicate the first vacuum main circuit breaker malfunction.

Optionally, obtain pantograph failure information and vacuum main circuit breaker failure information, pantograph failure information is used to indicate that a second pantograph failure may occur, and vacuum main breaker failure information may be used to indicate a second vacuum main breaker malfunction.

S803: Control the opening of the first working contactor and the opening of the redundant contactor, and close the second working contactor.

Specifically, the pantograph failure information is used to indicate the failure of the first pantograph, and the vacuum main circuit breaker failure information is used to indicate the failure of the first vacuum main circuit breaker. According to the pantograph failure information and the vacuum main circuit breaker failure Information, the first working contactor is opened and the redundant contactor is opened, and the second working contactor is closed, so that the second pantograph and the second vacuum main circuit breaker are put into operation.

Optionally, the pantograph fault information is used to indicate a failure of the first pantograph, and the vacuum main circuit breaker fault information is used to indicate a failure of the second vacuum main circuit breaker, according to the pantograph fault information and the vacuum main circuit breaker Fault information, the first working contactor is controlled to open, the second working contactor and the redundant contactor are closed, so that the second pantograph and the first vacuum main circuit breaker are put into operation.

Optionally, the pantograph failure information is used to indicate the failure of the second pantograph, and the vacuum main circuit breaker failure information is used to indicate the failure of the first vacuum main circuit breaker, according to the pantograph failure information and the vacuum main circuit breaker Fault information, the first working contactor and the redundant contactor are controlled to close, and the second working contactor is opened, so that the first pantograph and the second vacuum main circuit breaker are put into operation.

Optionally, the pantograph failure information is used to indicate the failure of the second pantograph, and the vacuum main circuit breaker failure information is used to indicate the failure of the second vacuum main circuit breaker, according to the pantograph failure information and the vacuum main circuit breaker Fault information, the first working contactor is controlled to close, the redundant contactor and the second working contactor are opened, so that the first pantograph and the second vacuum main circuit breaker are put into operation.

S804. According to the pantograph failure information, control the contact of the grid voltage conversion relay on the side of the second pantograph.

Optionally, the high-voltage voltage transformer can receive the grid voltage signal of the first pantograph or the second pantograph through the change of the contacts of the grid voltage conversion relay. Achieved.

When no pantograph is raised, the grid voltage conversion relay remains unchanged;

When a pantograph of the locomotive is raised, the contact of the pantograph switching relay is switched to the side corresponding to the raised pantograph; if the corresponding pantograph fails, the pantograph switching relay is switched to the normal pantograph One side

Optionally, when the locomotive is in the warehouse test, the switching of the contacts of the grid voltage conversion relay is achieved by the pantograph mode selection. The internal test refers to that the power supply of the high-voltage current path of the locomotive does not come from the pantograph, but from the internal power supply. During the internal test, the pantograph generally does not rise, so it cannot pass the current locomotive's pantograph. The rising state is determined.

Specifically, in this embodiment, according to the pantograph failure information, the pantograph failure information is used to indicate the failure of the first pantograph, then the contact of the grid voltage conversion relay on the side of the second pantograph is controlled The contact makes the contact of the normally working second pantograph, voltage transformer and grid voltage conversion relay on the side of the second pantograph close to form a current path, which can normally obtain grid voltage information.

Optionally, according to the pantograph failure information, the pantograph failure information is used to indicate the failure of the second pantograph, then the contact of the grid voltage conversion relay on the side of the first pantograph is contacted, so that the normal operation The contacts of the first pantograph, voltage transformer and grid voltage conversion relay on the side of the first pantograph close to form a current path, which can normally obtain grid voltage information.

The locomotive high-voltage system redundancy control method provided by the embodiment of the present invention judges that the pantograph mode is a single-bow mode; obtains pantograph failure information and vacuum main circuit breaker failure information, and pantograph failure information is used to indicate the first pantograph If the pantograph or the second pantograph fails, the vacuum main circuit breaker fault information is used to indicate the first vacuum main circuit breaker or the second vacuum main circuit breaker. According to the pantograph fault information and the vacuum main circuit breaker fault information, The conversion operation of the high-voltage conversion contactor makes the pantograph and vacuum main circuit breaker that have not failed to work, and forms a high-voltage current path together with the transformer, which avoids that each locomotive has only one vacuum main circuit breaker. When the circuit breaker fails, the high-voltage current path cannot be formed, causing the problem of locomotive breakdown. According to the pantograph fault information, the switching operation of the grid voltage conversion relay is performed, so that the contacts of the normally working pantograph, voltage transformer and grid voltage conversion relay on the side of the pantograph that has not failed are closed to form a current path, Able to obtain network pressure information normally.

In the following, in conjunction with specific embodiments, the process of handling the failure of the vacuum main circuit breaker will be described in detail with the pantograph mode being the double bow mode. FIG. 9 is a third schematic flowchart of a redundant control method for a locomotive high-voltage system according to an embodiment of the present invention. As shown in FIG. 9, the process includes:

S901. Determine that the pantograph mode is a double bow mode.

Specifically, in this embodiment, the pantograph mode is a double bow mode, that is, the first pantograph and the second pantograph are raised, and the pantograph near the main control end of the locomotive is raised for scraping ice, away from the train The pantograph at the main control end is raised for contact with the high-voltage power grid on the railway side to transfer the power to the locomotive. The grid voltage conversion relay is away from the contact of the pantograph on the side of the main control direction of the locomotive, and the vacuum main circuit breaker corresponding to the pantograph away from the main control end of the locomotive is closed, forming a high-voltage current path. If the pantograph near the main control end of the locomotive fails, it will not affect the high voltage path, and the pantograph does not need to be switched. If the pantograph far away from the main control end of the locomotive fails, it will affect the high voltage path. According to the pantograph's fault information, the pantograph close to the main control end of the locomotive will be used to transmit grid power and switch the vacuum mains close to the main control end of the locomotive. The circuit breaker is closed, and the contact of the grid voltage conversion relay on the pantograph side of the locomotive near the main control end is closed.

S902: Obtain the vacuum main circuit breaker failure information, where the vacuum main circuit breaker failure information is used to indicate a failure of the second vacuum main circuit breaker;

S902 provided in this embodiment is similar to S201 provided in the embodiment of FIG. 2 and will not be repeated here.

Optionally, acquiring the fault information of the vacuum main circuit breaker may also be used to indicate the fault of the first vacuum main circuit breaker, which is specifically determined by the faulty vacuum main circuit breaker.

S903: Control the second working contactor and the redundant contactor to open according to the fault information of the vacuum main circuit breaker, and close the first working contactor.

Specifically, in this embodiment, according to the vacuum main circuit breaker failure information, the vacuum main circuit breaker failure information is used to indicate a failure of the second vacuum main circuit breaker, and then the redundant contactor and the second working contactor are controlled to be disconnected, The first working contactor is closed, so that the second pantograph and the first vacuum main circuit breaker are put into operation.

Optionally, the fault message of the vacuum main circuit breaker is used to indicate when the first vacuum main circuit breaker fails,

Then the second working contactor is controlled to close, the redundant working contactor and the first working contactor are opened, so that the second pantograph and the second vacuum main circuit breaker are put into operation.

Optionally, if pantograph failure information is obtained, the high-voltage conversion contactor is switched according to pantograph failure information and/or vacuum main circuit breaker failure information. For the specific switching process, refer to the embodiment of FIG. 8, This embodiment will not be repeated here.

S904. If pantograph failure information is obtained, the network voltage conversion relay is switched according to the pantograph failure information.

Further, in the double bow mode, in combination with the position of the main control end, the switching operation of the network voltage conversion relay is performed. Specifically, when the first pantograph of the locomotive is far from the main control terminal, if the first pantograph fails, the grid voltage conversion relay is converted to the side of the second pantograph according to the first pantograph failure information; When the second pantograph of the locomotive is far from the main control terminal, if the second pantograph fails, the grid voltage conversion relay is switched to the side of the first pantograph according to the fault information of the second pantograph.

The locomotive high-voltage system redundancy control method provided in this embodiment determines that the pantograph mode is a double-bow mode; the vacuum main circuit breaker fault information is obtained, and the vacuum main circuit breaker fault information is used to indicate the second vacuum main circuit breaker A fault occurs; according to the fault information of the vacuum main circuit breaker, the first working contactor is controlled to open, the redundant contactor and the second working contactor are closed so that the second pantograph and the first vacuum main circuit breaker are put into operation, so that The second pantograph and the first vacuum main circuit breaker form a high-voltage current path, which avoids that each locomotive has one and only one vacuum main circuit breaker. When the vacuum main circuit breaker fails, it cannot form a high-voltage current path, causing the locomotive to break problem.

10 is a schematic diagram of a redundant control system for a locomotive high voltage system provided by an embodiment of the present invention. As shown in FIG. 10, the system includes: a control device 101 and a locomotive high voltage redundant circuit 102. The locomotive high voltage redundant circuit includes: a first receiver Pantograph 1021, second pantograph 1022, high voltage switching contactor 1023, first vacuum main circuit breaker 1024, second vacuum main circuit breaker 1025, transformer 1026, first high voltage transformer 1027, second high voltage transformer 1028 and Network voltage conversion relay 1029,

Among them, the high-voltage conversion contactor 1023 is connected to the first pantograph 1021, the second pantograph 1022, the first vacuum main circuit breaker 1024, and the second vacuum main circuit breaker 1025, respectively. A high voltage transformer connection 1027 and a second high voltage transformer 1028 are connected. The transformer 1026 is connected to the first vacuum main circuit breaker 1024 and the second vacuum main circuit breaker 1025 respectively. The first high voltage transformer 1027 and the second high voltage transformer 1028 are also connected. It is connected to the grid voltage conversion relay 1029; the control device 101 is connected to the high voltage conversion contactor 1023 and the grid voltage conversion relay 1029, respectively;

The control device is used to execute the method described in FIGS. 1 to 9.

Persons of ordinary skill in the art may understand that all or part of the steps of the foregoing method embodiments may be completed by a program instructing relevant hardware. The aforementioned program may be stored in a computer-readable storage medium. When the program is executed, the steps including the foregoing method embodiments are executed; and the foregoing storage medium includes various media that can store program codes, such as ROM, RAM, magnetic disk, or optical disk.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and these modifications or replacements do not deviate from the essence of the corresponding technical solutions of the technical solutions of the embodiments of the present invention. range.

Claims (11)

1. A locomotive high-voltage system redundancy control method is characterized in that it is applied to a locomotive high-voltage redundant circuit. The locomotive high-voltage redundant circuit includes: a first pantograph, a second pantograph, a high-voltage conversion contactor, a first A vacuum main circuit breaker, a second vacuum main circuit breaker, a transformer, a first high voltage transformer, a second high voltage transformer, and a grid voltage conversion relay, the high voltage conversion contactor and the first pantograph, the first Two pantographs are connected to the first vacuum main circuit breaker and the second vacuum main circuit breaker, and the high-voltage conversion contactor is also connected to the first high-voltage transformer and the second high-voltage transformer, respectively. The transformer is respectively connected to the first vacuum main circuit breaker and the second vacuum main circuit breaker, and the first high voltage transformer and the second high voltage transformer are also connected to the grid voltage conversion relay; Methods include:

   Obtain pantograph failure information and/or vacuum main circuit breaker failure information, the pantograph failure information is used to indicate a failed pantograph, and the vacuum main breaker failure information is used to indicate a failed vacuum main circuit breaker Device

   According to the pantograph failure information and/or the vacuum main circuit breaker failure information, performing conversion operation on the high-voltage conversion contactor under a first preset condition;

   If the pantograph failure information is obtained, the network voltage conversion relay is switched under the second preset condition according to the pantograph failure information.
2. The method according to claim 1, wherein the acquiring pantograph failure information includes:

   After the pantograph relay is energized, it is determined whether the pantograph is raised within the first preset duration, if not, it is determined that the pantograph has a bow-raising failure, and the number of times the bow-raising failure is greater than Acquiring the pantograph failure information at the first preset number of times; or

   After the pantograph relay is de-energized, it is determined whether the pantograph falling time exceeds the second preset duration, and if so, it is determined that the pantograph has a bow-down failure and the pantograph failure information is obtained.
3. The method according to claim 1, wherein the acquiring the fault information of the vacuum main circuit breaker comprises:

   After the vacuum main circuit breaker relay is energized, it is determined whether the time period from opening to closing of the vacuum main circuit breaker is greater than a third preset time period, and if so, it is determined that the vacuum main circuit breaker has a closing vacuum main circuit breaker failure , When the number of failures of the main vacuum breaker is greater than the second preset number, obtain the fault information of the vacuum main breaker; or

   After the vacuum main circuit breaker relay is de-energized, it is determined whether the time period from closing to opening of the vacuum main circuit breaker is greater than a fourth preset time period, and if so, it is determined that the vacuum main circuit breaker is broken. And obtain the fault information of the vacuum main circuit breaker.
4. The method according to claim 1, wherein the high-voltage conversion contactor comprises: a first working contactor, a second working contactor and a redundant contactor; the first working contactor and the first A pantograph is connected to the first vacuum main circuit breaker, and the second working contactor is respectively connected to the second pantograph and the second vacuum main circuit breaker; the redundant contactor is respectively connected to the The first working contactor is connected to the second working contactor.
5. The method according to claim 1, wherein the pantograph mode is divided into a single bow mode and a double bow mode, and the pantograph mode can be switched when the third preset condition is satisfied.
6. The method according to claim 5, wherein the single bow mode is divided into a front bow mode, a rear bow mode, and an automatic mode;

   In the front bow mode, the first pantograph raises; if the first pantograph fails, manually switch to the second pantograph according to the fault information of the first pantograph rising;

   In the rear bow mode, the second pantograph raises; if the second pantograph fails, manually switch to the first pantograph according to the fault information of the second pantograph Bow raised

   In the automatic mode, the pantograph far away from the main control end is raised; if the pantograph far away from the main control end fails, it automatically switches to close to the main control according to the fault information of the pantograph away from the main control end The pantograph at the end is raised.
7. The method of claim 4, wherein if the pantograph mode is a single bow mode;

   If pantograph failure information is obtained, and the pantograph failure information is used to indicate a failure of the first pantograph, the conversion operation of the high-voltage conversion contactor according to the pantograph failure information includes:

   According to the pantograph failure information, control the first working contactor and the redundant contactor to open, and control the second working contactor to close;

   If the pantograph failure information is obtained, switching the grid voltage conversion relay according to the pantograph failure information includes:

   According to the pantograph failure information, the contact of the grid voltage conversion relay is controlled to switch to the side of the second pantograph.
8. The method of claim 5, wherein if the pantograph mode is a single bow mode;

   If pantograph failure information and vacuum main circuit breaker failure information are obtained, the pantograph failure information is used to indicate a failure of the first pantograph, and the vacuum main breaker failure information is used to indicate the first vacuum main circuit breaker If the relay fails, the conversion operation of the high-voltage conversion contactor based on the pantograph failure information and the vacuum main circuit breaker failure information includes:

   According to the pantograph failure information and the vacuum main circuit breaker failure information, control the first working contactor redundant contactor to open, and the second working contactor to close;

   If the pantograph failure information is obtained, switching the grid voltage conversion relay according to the pantograph failure information includes:

   According to the pantograph failure information, the contact of the grid voltage conversion relay is controlled to switch to the side of the second pantograph.
9. The method of claim 4, wherein if the pantograph mode is a double bow mode;

   If the locomotive main control terminal changes, the locomotive main control terminal information is obtained. The locomotive main control terminal information is used to indicate that the first pantograph approaches the direction of the locomotive main control terminal. Based on the locomotive main control terminal information, the High-voltage conversion contactor for conversion operation, including:

   Then, according to the information of the main control terminal of the locomotive, the second working contactor is controlled to be closed, and the redundant contactor and the first working contactor are opened;

   If the information of the main control terminal of the locomotive is obtained, the contact of the network voltage conversion relay on the side of the second pantograph is controlled according to the information of the main control terminal of the locomotive, and the first power is received The contact on the side of the bow is open.
10. The method of claim 5, wherein if the pantograph mode is a double bow mode;

    If the vacuum main circuit breaker failure information is obtained, and the vacuum main circuit breaker failure information is used to indicate a failure of the first vacuum main circuit breaker, the high-voltage conversion contactor is converted according to the vacuum main circuit breaker failure information Operations, including:

    According to the fault information of the vacuum main circuit breaker, the second working contactor is controlled to be closed, and the redundant contactor and the first working contactor are opened;

    If the fault information of the vacuum main circuit breaker is obtained, switching the grid voltage conversion relay according to the fault information of the vacuum main circuit breaker includes:

    According to the fault information of the vacuum main circuit breaker, the contact of the grid voltage conversion relay on the side of the second pantograph is controlled, and the contact on the side of the first pantograph is opened.
11. A locomotive high-voltage system redundant control system is characterized by comprising: control equipment and a locomotive high-voltage redundant circuit, the locomotive high-voltage redundant circuit includes: a first pantograph, a second pantograph, a high-voltage conversion contactor , A first vacuum main circuit breaker, a second vacuum main circuit breaker, a transformer, a first high voltage transformer, a second high voltage transformer and a grid voltage conversion relay, the high voltage conversion contactor and the first pantograph, respectively The second pantograph, the first vacuum main circuit breaker, the second vacuum main circuit breaker are connected, the high-voltage conversion contactor is also the first high-voltage transformer and the second high-voltage transformer respectively Connection, the transformer is connected to the first vacuum main circuit breaker and the second vacuum main circuit breaker, respectively, the first high voltage transformer and the second high voltage transformer are also connected to the grid voltage conversion relay The control device is connected to the high-voltage conversion contactor and the network voltage conversion relay respectively;

    The control device is used to execute the method according to any one of claims 1 to 10.

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