Rapid pantograph descending control circuit and method for avoiding pantograph-catenary fault diffusion

Abstract

The invention relates to the technical field of electrical control of railway vehicles, and discloses a rapid pantograph descending control circuit and method for avoiding pantograph-catenary fault diffusion. The circuit comprises a pantograph linkage pantograph descending control circuit which is composed of a programmable logic control unit, a circuit breaker, a pantograph descending position relay and an emergency pantograph descending electromagnetic valve, and signal transmission between units is achieved through train lines. The first programmable logic control unit outputs a forced far-end pantograph descending signal to the second programmable logic control unit after logic operation according to the first input signal, and the second programmable logic control unit outputs an electric signal to drive the emergency pantograph descending electromagnetic valve after logic operation according to the second input signal, so that quick pantograph descending is realized. Generally speaking, the method effectively solves the problem that in the prior art, when a serious pantograph-catenary fault occurs, pantograph-catenary fault diffusion is caused after automatic pantograph descending, and the stability and safety of the system are improved.

Description

Technical Field

[0001] The invention relates to the technical field of rail vehicle electrical control, and discloses a fast pantograph lowering control circuit and method for preventing pantograph-catenary faults from spreading. Background Art

[0002] As a key component of rail transit vehicles, the stable operation of pantographs is crucial to train operations. Although the existing pantograph control circuit has a variety of pantograph lowering functions, including normal, enable signal loss, emergency braking and ADD automatic pantograph lowering, it lacks a linkage control mechanism for multiple pantographs on the same vehicle when dealing with serious pantograph-network failures. In particular, the ADD automatic pantograph lowering is only for the damaged single pantograph, and cannot effectively prevent the expansion of the fault. Although the emergency brake button can trigger the pantograph lowering, there is an operation delay, and it is difficult to avoid the expansion of the fault area at high speeds. Therefore, there is an urgent need for a control scheme that can quickly link the lowering of other pantographs on the same vehicle after the ADD is triggered, so as to reduce the damage to the train and the contact network caused by the pantograph-network failure. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a fast bow-lowering control circuit and method for avoiding the spread of bow-catenary faults, thereby solving the problem in the prior art of automatic bow lowering causing the spread of bow-catenary faults when serious bow-catenary faults occur.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a fast pantograph lowering control circuit for preventing the spread of pantograph-network faults, including a pantograph-linked pantograph lowering control circuit: The pantograph linkage pantograph lowering control circuit includes a first programmable logic control unit, a second programmable logic control unit, a DC110V positive line, a DC110V negative line, a first circuit breaker, a second circuit breaker, a first pantograph lowering position relay, a second pantograph lowering position relay, a first emergency pantograph lowering solenoid valve, and a second emergency pantograph lowering solenoid valve; One end of the first circuit breaker is connected to the DC110V positive line, and the other end is connected to the first programmable logic control unit; One end of the second circuit breaker is connected to the DC110V positive line, and the other end is connected to the second programmable logic control unit; The first pantograph lowering position relay is connected to a first programmable logic control unit, and the first emergency pantograph lowering solenoid valve is connected to the first programmable logic control unit; The second pantograph lowering position relay is connected to a second programmable logic control unit, and the second emergency pantograph lowering solenoid valve is connected to the second programmable logic control unit; The first programmable logic control unit is connected to the second programmable logic control unit via a train line; The first programmable logic control unit and the second programmable logic control unit are connected to the DC110V negative line.

[0005] Preferably, in a possible implementation manner of the first aspect, the first programmable logic control unit and the second programmable logic control unit receive a pantograph raising instruction from a pantograph raising train line and a pantograph lowering instruction from a pantograph lowering train line; The first programmable logic control unit receives a first bow lowering position relay state signal sent by a first bow lowering position relay, and sends a first emergency bow lowering signal to a first emergency bow lowering solenoid valve; The second programmable logic control unit receives a second bow lowering position relay state signal sent by a second bow lowering position relay, and sends a second emergency bow lowering signal to a second emergency bow lowering solenoid valve; The first programmable logic control unit and the second programmable logic control unit transmit a forced remote pantograph lowering signal to each other through the train line.

[0006] In a second aspect, the present invention provides a method for quickly lowering a bow to avoid the spread of a bow-catcher fault, comprising: Step S100: the first programmable logic control unit outputs a forced remote bow lowering signal to the second programmable logic control unit after performing a logic operation according to the first input signal; Step S200: The second programmable logic control unit outputs an electrical signal after logic operation according to the second input signal to drive the second emergency pantograph lowering solenoid valve to quickly lower the pantograph.

[0007] Preferably, in a possible implementation manner of the second aspect, the first input signal includes a first bow raising instruction pulse signal, a first bow lowering instruction pulse signal and a first bow lowering position relay state signal; The second input signal includes a second bow raising instruction pulse signal, a second bow lowering instruction pulse signal, a second bow lowering position relay state signal, and a forced remote bow lowering signal output by the first programmable logic control unit.

[0008] Preferably, in a possible implementation manner of the second aspect, step S100 specifically includes: The first programmable logic control unit is powered on and performs self-test; Determine whether the bow raising instruction pulse signal received by the first programmable logic control unit changes from 0 to 1. If not, do not output the forced remote bow lowering signal; if so, Determine whether the bow lowering instruction pulse signal received by the first programmable logic control unit is 1. If it is 1, no forced remote bow lowering signal is output; if it is not 1, Determine whether the first pantograph lowering position relay state signal is 0. If it is not 0, no forced remote pantograph lowering signal is output; if it is 0, The first programmable logic control unit outputs a forced remote pantograph lowering signal to the second programmable logic control unit through the train line.

[0009] Preferably, in a possible implementation manner of the second aspect, step S200 specifically includes: The second programmable logic control unit is powered on and performs self-test; Determine whether the bow raising instruction pulse signal received by the second programmable logic control unit changes from 0 to 1. If not, no electrical signal is output to drive the second emergency bow lowering solenoid valve; if so, Determine whether the bow lowering instruction pulse signal received by the second programmable logic control unit is 1. If so, no electrical signal is output to drive the second emergency bow lowering solenoid valve; if not, Determine whether the state signal of the second pantograph lowering position relay is 1. If it is 1, no electrical signal is output to drive the second emergency pantograph lowering solenoid valve; if it is not 1, Determine whether the forced remote bow lowering signal received by the second programmable logic control unit is 0. If it is 0, no electrical signal is output to drive the second emergency bow lowering solenoid valve; if it is not 0, The second programmable logic control unit integrates the judgment of the preceding logic and outputs an electrical signal to drive the second emergency bow lowering solenoid valve; After the second emergency pantograph lowering solenoid valve is energized, the pantograph is lowered quickly.

[0010] In a third aspect, the present invention provides a computer program product, comprising a rapid bow lowering control program for preventing the spread of bow-net faults, and when the program runs on an electronic device, the electronic device executes any possible implementation method as in the second aspect.

[0011] The beneficial effect of the present invention is that, through the pantograph linkage pantograph lowering control circuit, when a pantograph-network fault is detected or an emergency pantograph lowering is required, the current programmable logic control unit can quickly perform logic operations according to the input signal and output a forced remote pantograph lowering signal to the remote programmable logic control unit. This design ensures a rapid response to the fault, effectively isolates the fault area, prevents the fault from further spreading, and improves the stability and safety of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 The present application provides a pantograph-linked pantograph-lowering control circuit diagram for a rapid pantograph-lowering control circuit that avoids the spread of pantograph-network faults.

[0014] Figure 2 A flowchart of a method for quickly lowering a bow to avoid the spread of a bow-catenary fault is provided for this application.

[0015] Figure 3 The present application provides a method for quickly lowering a bow to avoid the spread of a bow-network fault, and provides a logic diagram of a first programmable logic control unit outputting a forced remote bow-lowering signal.

[0016] Figure 4 A second emergency bow-lowering solenoid valve driving signal logic diagram is provided for the present application in a method for quickly lowering a bow to avoid the spread of a bow-network fault. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1: Figure 1 As shown, the present invention provides a fast pantograph lowering control circuit for preventing the spread of pantograph-network faults, including a pantograph-linked pantograph lowering control circuit.

[0019] Specifically, the pantograph linkage pantograph lowering control circuit includes a first programmable logic control unit, a second programmable logic control unit, a DC110V positive line, a DC110V negative line, a first circuit breaker, a second circuit breaker, a first pantograph lowering position relay, a second pantograph lowering position relay, a first emergency pantograph lowering solenoid valve, and a second emergency pantograph lowering solenoid valve.

[0020] One end of the first circuit breaker is connected to the DC110V positive line, and the other end is connected to the first programmable logic control unit.

[0021] One end of the second circuit breaker is connected to the DC110V positive line, and the other end is connected to the second programmable logic control unit.

[0022] The first pantograph lowering position relay is connected to the first programmable logic control unit; the first emergency pantograph lowering solenoid valve is connected to the first programmable logic control unit.

[0023] The second pantograph lowering position relay is connected to the second programmable logic control unit; the second emergency pantograph lowering solenoid valve is connected to the second programmable logic control unit.

[0024] The first programmable logic control unit is connected to the second programmable logic control unit through a train line.

[0025] The first programmable logic control unit and the second programmable logic control unit are connected to the DC110V negative line.

[0026] The first programmable logic control unit and the second programmable logic control unit receive a pantograph raising instruction from the pantograph raising train line and a pantograph lowering instruction from the pantograph lowering train line.

[0027] The first programmable logic control unit receives a signal from the first pantograph lowering position relay, and sends a signal to the first emergency pantograph lowering solenoid valve.

[0028] The second programmable logic control unit receives a signal from the second pantograph lowering position relay and sends a signal to the second emergency pantograph lowering solenoid valve.

[0029] The first programmable logic control unit and the second programmable logic control unit transmit a forced remote pantograph lowering signal to each other through the train line.

[0030] Embodiment 2: Figure 2 As shown, the present invention provides a fast bow lowering control method for avoiding the spread of a bow-catenary fault, comprising: Step S100: The first programmable logic control unit outputs a forced remote bow lowering signal to the second programmable logic control unit after performing a logic operation according to the first input signal. The logic diagram of the first programmable logic control unit outputting the forced remote bow lowering signal is as follows: Figure 3 shown.

[0031] Specifically, the first input signal includes a first bow raising instruction pulse signal, a first bow lowering instruction pulse signal and a first bow lowering position relay state signal.

[0032] The first programmable logic control unit is powered on and performs self-test.

[0033] It is determined whether the pantograph raising instruction received by the first programmable logic control unit changes from 0 to 1. If not, the forced remote pantograph lowering signal is not output. It is ensured that the forced remote pantograph lowering signal can be output only after the train has raised the pantograph, so as to avoid the LCU outputting this signal when the train is just awakened and powered on.

[0034] It is determined whether the pantograph lowering instruction received by the first programmable logic control unit is 1, and if it is 1, no forced remote pantograph lowering signal is output, so as to avoid outputting a forced remote pantograph lowering signal when the pantograph lowering instruction of the train is valid.

[0035] Determine whether the state of the first pantograph lowering position relay is 0. If it is not 0, the forced remote pantograph lowering signal is not output. Combining the first three steps, it can be determined that after the pantograph is raised, in the absence of a pantograph lowering command, the pantograph is in the pantograph lowering state, that is, the ADD pantograph lowering function is triggered on this pantograph.

[0036] The first programmable logic control unit integrates the judgment of the preceding logic and outputs a forced remote bow lowering signal to the second programmable logic control unit through the train line.

[0037] Step S200: Figure 4 As shown, the second programmable logic control unit outputs an electrical signal after logic operation according to the second input signal to drive the second emergency pantograph lowering solenoid valve, so that the pantograph is quickly lowered. The logic diagram of the second emergency pantograph lowering solenoid valve driving signal is shown in Figure 4 shown.

[0038] Specifically, the second input signal includes a second bow raising instruction pulse signal, a second bow lowering instruction pulse signal, a second bow lowering position relay state signal, and a forced remote bow lowering signal output by the first programmable logic control unit.

[0039] The second programmable logic control unit is powered on and performs self-test.

[0040] It is determined whether the pantograph raising instruction received by the second programmable logic control unit changes from 0 to 1. If not, no electrical signal is output to drive the second emergency pantograph lowering solenoid valve. It is ensured that only when the train has pantograph raising action can the electrical signal be output to drive the second emergency pantograph lowering solenoid valve, so as to avoid the second programmable logic control unit outputting this signal when the train is just awakened and powered on.

[0041] Determine whether the state of the second pantograph lowering position relay is 1. If so, do not output an electrical signal to drive the second emergency pantograph lowering solenoid valve. Avoid outputting an electrical signal to drive the second emergency pantograph lowering solenoid valve when the pantograph lowering instruction is valid.

[0042] It is determined whether the state of the second pantograph lowering position relay is 1. If yes, no electric signal is output to drive the second emergency pantograph lowering solenoid valve. This prevents the second programmable logic control unit from outputting an electric signal to drive the second emergency pantograph lowering solenoid valve when the pantograph is already in the pantograph lowering state.

[0043] It is determined whether the forced remote bow lowering signal output by the first programmable logic control unit to the second programmable logic control unit is 0. If so, no electrical signal is output to drive the second emergency bow lowering solenoid valve.

[0044] The second programmable logic control unit outputs an electrical signal to drive the second emergency bow lowering solenoid valve.

[0045] After the second emergency pantograph lowering solenoid valve is energized, the pantograph is lowered quickly.

[0046] Embodiment 3: The present invention provides a computer program product, which includes a rapid bow-lowering control program for avoiding the spread of bow-catenary faults, so as to complete a rapid bow-lowering control method for avoiding the spread of bow-catenary faults provided in the above embodiment.

[0047] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A fast bow-dropping control circuit for preventing the spread of a pantograph-catenary fault, characterized in that: Including pantograph linkage pantograph lowering control circuit: The pantograph linkage pantograph lowering control circuit includes a first programmable logic control unit, a second programmable logic control unit, a DC110V positive line, a DC110V negative line, a first circuit breaker, a second circuit breaker, a first pantograph lowering position relay, a second pantograph lowering position relay, a first emergency pantograph lowering solenoid valve, and a second emergency pantograph lowering solenoid valve; One end of the first circuit breaker is connected to the DC110V positive line, and the other end is connected to the first programmable logic control unit; One end of the second circuit breaker is connected to the DC110V positive line, and the other end is connected to the second programmable logic control unit; The first pantograph lowering position relay is connected to a first programmable logic control unit, and the first emergency pantograph lowering solenoid valve is connected to the first programmable logic control unit; The second pantograph lowering position relay is connected to a second programmable logic control unit, and the second emergency pantograph lowering solenoid valve is connected to the second programmable logic control unit; The first programmable logic control unit is connected to the second programmable logic control unit via a train line; The first programmable logic control unit and the second programmable logic control unit are connected to the DC110V negative line.

2. The circuit according to claim 1, characterized in that The first programmable logic control unit and the second programmable logic control unit receive a pantograph raising instruction from a pantograph raising train line and a pantograph lowering instruction from a pantograph lowering train line; The first programmable logic control unit receives a first bow lowering position relay state signal sent by a first bow lowering position relay, and sends a first emergency bow lowering signal to a first emergency bow lowering solenoid valve; The second programmable logic control unit receives a second bow lowering position relay state signal sent by a second bow lowering position relay, and sends a second emergency bow lowering signal to a second emergency bow lowering solenoid valve; The first programmable logic control unit and the second programmable logic control unit transmit a forced remote pantograph lowering signal to each other through the train line.

3. A rapid bow lowering control method to avoid the spread of bow-catwalk faults, characterized in that: include: Step S100: the first programmable logic control unit outputs a forced remote bow lowering signal to the second programmable logic control unit after performing a logic operation according to the first input signal; Step S200: The second programmable logic control unit outputs an electrical signal after logic operation according to the second input signal to drive the second emergency pantograph lowering solenoid valve to quickly lower the pantograph.

4. The method according to claim 3, characterized in that The first input signal includes a first bow raising instruction pulse signal, a first bow lowering instruction pulse signal and a first bow lowering position relay state signal; The second input signal includes a second bow raising instruction pulse signal, a second bow lowering instruction pulse signal, a second bow lowering position relay state signal, and a forced remote bow lowering signal output by the first programmable logic control unit.

5. The method according to claim 3, characterized in that: The step S100 specifically includes: The first programmable logic control unit is powered on and performs self-test; Determine whether the bow raising instruction pulse signal received by the first programmable logic control unit changes from 0 to 1. If not, do not output the forced remote bow lowering signal; if so, Determine whether the bow lowering instruction pulse signal received by the first programmable logic control unit is 1. If it is 1, no forced remote bow lowering signal is output; if it is not 1, Determine whether the first pantograph lowering position relay state signal is 0. If it is not 0, no forced remote pantograph lowering signal is output; if it is 0, The first programmable logic control unit outputs a forced remote pantograph lowering signal to the second programmable logic control unit through the train line.

6. The method according to claim 3, characterized in that The step S200 specifically includes: The second programmable logic control unit is powered on and performs self-test; Determine whether the bow raising instruction pulse signal received by the second programmable logic control unit changes from 0 to 1. If not, no electrical signal is output to drive the second emergency bow lowering solenoid valve; if so, Determine whether the bow lowering instruction pulse signal received by the second programmable logic control unit is 1. If it is 1, no electrical signal is output to drive the second emergency bow lowering solenoid valve; if it is not 1, Determine whether the state signal of the second pantograph lowering position relay is 1. If it is 1, no electrical signal is output to drive the second emergency pantograph lowering solenoid valve; if it is not 1, Determine whether the forced remote bow lowering signal received by the second programmable logic control unit is 0. If it is 0, no electrical signal is output to drive the second emergency bow lowering solenoid valve; if it is not 0, The second programmable logic control unit outputs an electrical signal to drive the second emergency bow lowering solenoid valve; After the second emergency pantograph lowering solenoid valve is energized, the pantograph is lowered quickly.

7. A computer program product, characterized in that The computer program product comprises a fast bow-lowering control program for avoiding the spread of a pantograph-catwalk fault, and the program implements the method according to any one of claims 3 to 6 when executed by a processor.

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