CN110435483B - High-voltage interlocking protection device and method for railway vehicle - Google Patents
High-voltage interlocking protection device and method for railway vehicle Download PDFInfo
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- CN110435483B CN110435483B CN201910654239.3A CN201910654239A CN110435483B CN 110435483 B CN110435483 B CN 110435483B CN 201910654239 A CN201910654239 A CN 201910654239A CN 110435483 B CN110435483 B CN 110435483B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/02—Details
- B60M1/04—Mechanical protection of line; Protection against contact by living beings
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Abstract
The invention provides a high-voltage interlocking protection device and a method for a railway vehicle, wherein the device comprises a first key box assembly, a second key box assembly, a third key box assembly, a first protection grounding switch assembly and a second protection grounding switch assembly; the first key box component corresponds to the first protection grounding switch and is used for controlling the lifting of the corresponding pantograph; the second key box component corresponds to the second protection grounding switch and is used for controlling the lifting of the corresponding pantograph; the third key box component corresponds to the first protection grounding switch, the second protection grounding switch, the converter corresponding to the workshop power supply and each carriage and is used for controlling all levels of circuit interlocking protection among the corresponding protection grounding switch, the corresponding traction converter grounding switch and the workshop power supply. The device has a simple structure, is safe and reliable, and simultaneously, the method ensures the standardization and the standardization of the operation of the high-voltage safety interlocking system and ensures the personal safety of operating personnel during vehicle maintenance.
Description
Technical Field
The invention relates to the technical field of locomotive high-voltage protection, in particular to a high-voltage interlocking protection device and method for a rail vehicle.
Background
At present, a high-voltage safety interlocking system is an important component of a high-voltage safety protection system of a railway vehicle, and is related to personal safety of train vehicle operators and protection and safe use of high-voltage equipment.
In recent years, with the use of more and more rail vehicles, the high-voltage safety protection system of the train gradually becomes the key point of the current work, and with the wide popularization and application of the domestic AC25kV urban rail vehicles, the requirements on the safety and reliability of the work of the high-voltage system of the train are higher and higher.
However, most of the existing schemes directly operate the traction converter, the influence of a high-voltage circuit on the converter is not considered, the circuit load problem caused subsequently is not considered, and the problem of burning loss of the grounding of an internal grounding switch is often caused.
Disclosure of Invention
Technical problem to be solved
The invention is used for solving the problem of circuit grounding burning loss caused by operating the grounding switch in the traction converter under the condition that a high-voltage circuit is not disconnected.
(II) technical scheme
In order to solve the technical problem, the invention provides a high-voltage interlocking protection device and method for a railway vehicle.
According to one aspect of the present invention, there is provided a high voltage interlock protection device for a rail vehicle, comprising: the key box comprises a first key box assembly, a second key box assembly, a third key box assembly, a first protection grounding switch assembly and a second protection grounding switch assembly; the first key box component corresponds to the first protection grounding switch and is used for controlling the lifting of the corresponding pantograph; the second key box component corresponds to the second protection grounding switch and is used for controlling the lifting of the corresponding pantograph; the third key box component corresponds to the first protection grounding switch, the second protection grounding switch, the converter corresponding to the workshop power supply and each compartment and is used for controlling all levels of circuit interlocking protection among the corresponding protection grounding switch, the corresponding traction converter grounding switch and the workshop power supply.
According to another aspect of the invention, a vehicle body is provided, which comprises the rail vehicle high-voltage interlocking protection device.
According to another aspect of the invention, an interlock protection method based on the rail vehicle high-voltage interlock protection device is provided, which comprises the following steps: disconnecting the pantograph gas circuit, turning a protective grounding switch to a grounding position, grounding a traction converter power connection switch, and switching on a workshop power supply; and/or
Disconnecting the workshop power supply connection and the traction converter grounding connection, restoring the protective grounding switch to the working position, and restoring the protective grounding switch to the working position.
(III) advantageous effects
Compared with the prior art, the invention provides the railway vehicle high-voltage interlocking protection device and the method, and the logic protection of high-voltage equipment is realized in a hierarchical interlocking mode through a hardware circuit. The device has a simple structure, is safe and reliable, and simultaneously, the method ensures the standardization and the standardization of the operation of the high-voltage safety interlocking system and ensures the personal safety of operating personnel during vehicle maintenance.
Drawings
FIG. 1 is a block diagram of a high voltage interlock protection device according to an embodiment of the present invention;
FIG. 2 is a logical block diagram of a high voltage interlock protection device according to an embodiment of the present invention;
fig. 3 is a circuit logic schematic of a protective grounding switch according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present invention, unless otherwise specified, "plurality", "plural groups" means two or more, and "several", "several groups" means one or more.
In summary, the present application provides a rail vehicle high-voltage interlocking protection device and method, which implement various levels of circuit interlocking logic protection between a pantograph and a protection grounding switch, between the protection grounding switch and a traction converter grounding switch and between power boxes of a workshop through hardware circuits, so as to ensure the personal safety of train vehicle operators and the safe use of high-voltage equipment.
In a specific embodiment, fig. 1 and 2 respectively show a block diagram and a logical block diagram of a high-voltage interlock protection device for a railway vehicle according to an embodiment of the present invention, as shown in fig. 1 and 2, the high-voltage interlock protection device includes: the key box comprises a first key box assembly, a second key box assembly, a third key box assembly, a first protection grounding switch assembly and a second protection grounding switch assembly.
The vehicle power supply box comprises a vehicle body, a vehicle current transformer, a vehicle power supply box and a vehicle power supply box, wherein the vehicle current transformer and the vehicle power supply box are positioned below the vehicle body.
Wherein, in one embodiment, the first key box assembly is disposed to three cars of a rail train, the second key box assembly is disposed to six cars of the rail train, and the third key box assembly is disposed to four cars of the rail train.
Wherein, in one embodiment, the first protective earthing switch assembly is arranged to three cars of the rail train and the second protective earthing switch assembly is arranged to six cars of the rail train.
Wherein, in one embodiment, the first key box assembly comprises a first key and a first shut off valve, as shown in fig. 1 and 2, wherein the first key is key a1 and the first shut off valve is shut off valve a 1.
Wherein, in one embodiment, the second key box assembly includes a second key and a second shut-off valve, as shown in fig. 1 and 2, wherein the second key is key a2 and the second shut-off valve is shut-off valve a 2.
Wherein, in one embodiment, the first protective earthing switch assembly comprises a first lock corresponding to the first key of the first key box assembly, shown as lock a1, and a first earthing key, shown as key B1, as shown in fig. 1 and 2.
Wherein in one embodiment the second protective earthing switch assembly comprises a second lock corresponding to the second key of the second key box assembly, shown as lock a2, and a second earthing key, shown as key B2, as shown in fig. 1 and 2.
Wherein, in one embodiment, the third key box assembly comprises a first ground lock, a second ground lock, a first inter-vehicle power box key, a second inter-vehicle power box key, and a plurality of car keys corresponding to respective cars. As shown in fig. 1 and 2, the first grounding lock corresponds to a first grounding key, in the figures, lock B1; the second ground lock corresponds to a second ground key, lock B2 in the figure. The first vehicle room power box key corresponds to the first vehicle room power box, in the figure, the key D1, and the second vehicle room power box key corresponds to the second vehicle room power box, in the figure, the key D2. The first workshop power box is arranged in a four-vehicle workshop, and the second workshop power box is arranged in a five-vehicle workshop. As shown in fig. 1, the third key box, shown as key box 3, is arranged to a four-car position.
The corresponding compartment keys of the plurality of compartments correspond to the converter locks of the plurality of compartments, which are respectively keys C1-C6 and locks C1-C6 corresponding to the compartments, wherein the locks C1-C6 correspond to the converters of one vehicle, two vehicles, four vehicles, five vehicles, seven vehicles and eight vehicles in the embodiment.
Wherein, in one embodiment, the ground lock interlocks with the car key and the shop power box key.
Among them, in one embodiment, a first cut-off valve is disposed between a cabin pantograph and a corresponding auxiliary air compressor corresponding to a first key, as shown in fig. 1, and a cut-off valve a1 is disposed between a three-car pantograph and the auxiliary air compressor 1.
Wherein, in one embodiment, a second cut-off valve corresponding to a second key is disposed between the cabin pantograph and the corresponding auxiliary air compressor, as shown in fig. 1, and a cut-off valve a2 is disposed between the six-car pantograph and the auxiliary air compressor 2.
Fig. 3 is a logic diagram of a traction converter grounding switch circuit according to an embodiment of the present invention, which is connected to an inverter and a rectifier through a bidirectional circuit, respectively, and connected to a dc voltage at two ends, respectively, and grounded through two switches, respectively, as shown in fig. 3.
In another embodiment, a vehicle body is provided that includes a rail vehicle high voltage interlock protection device as described above.
In yet another embodiment, a rail vehicle high-voltage interlock protection method is provided, wherein the method is implemented based on the above high-voltage interlock protection device, and the method includes: and the pantograph gas circuit is disconnected, the protective grounding switch is grounded, the traction converter is grounded by the grounding switch, and the workshop power supply is connected.
In one embodiment, wherein disconnecting the pantograph gas circuit comprises: disconnecting the first stop valve to lower the pantograph of the corresponding carriage, and pulling out the first key from the first key box assembly; the second shut-off valve is opened to allow the corresponding car pantograph to descend and the second key is removed from the second key box assembly.
In one embodiment, as shown in fig. 1 and 2, disconnect 3 the vehicle shutoff valve a1, ensure that the vehicle pantograph is lowered, extract key a1 from the key box 1; the 6-vehicle cutoff valve a2 is turned off to ensure that the pantograph of the vehicle descends, and the key a2 is removed from the key box 2.
In one embodiment, wherein turning the protective grounding switch to a ground position comprises: inserting a first key into a first lock corresponding to the first protection grounding switch, operating a protection grounding switch handle, closing the first protection grounding switch, and pulling out the first grounding key; and inserting a second key into a second lock corresponding to the second protection grounding switch, operating a protection grounding switch handle, closing the second protection grounding switch and extracting the second grounding key.
In one embodiment, as shown in fig. 1 and 2, the key a1 is inserted into the protective earthing switch 1 lock a1, the protective earthing switch handle is operated, the protective earthing switch 1 is closed, and the key B1 is extracted; the key A2 is inserted into the protection grounding switch 2 lock A2, the protection grounding switch handle is operated, the protection grounding switch 2 is closed, and the key B2 is pulled out.
In one embodiment, grounding the traction converter grounding switch to turn on the plant power supply further comprises: simultaneously inserting the first grounding key and the second grounding key into a third key box component, and pulling out the carriage keys corresponding to all carriages, the first workshop power box key and the second workshop power box key; inserting a carriage key of each carriage into a traction converter grounding switch, and operating a switch handle to enable a middle current loop of the traction converter to be grounded; and respectively inserting the first workshop power box key and the second workshop power box key into corresponding workshop power, and opening the workshop power lock cover to enable the workshop power connector to be connected to an external power socket.
In one embodiment, as shown in fig. 1 and 2, the keys C1 to C6, and the keys D1 and D2 can be extracted by inserting the keys B1 and B2 into the key box 3 at the same time; inserting keys C1-C6 into a traction converter grounding switch, and operating a switch handle to enable a middle direct-current loop of the traction converter to be grounded; therefore, the condition that the high-voltage circuit is not disconnected is avoided, the internal grounding switch of the traction converter is operated, the circuit grounding burning loss is caused, and the traction converter can be maintained after the grounding switch is grounded; then the keys D1 and D2 are respectively inserted into 4 and 5 vehicle power supplies, and the vehicle power supply lock cover is opened, so that the vehicle power supply connector can be connected with an external power socket.
In a further embodiment, a rail vehicle high-voltage interlock protection method is provided, wherein the method is implemented based on the above high-voltage interlock protection device, and the method further comprises: disconnecting the workshop power supply connection and the traction converter grounding connection, restoring the protective grounding switch to the working position, and restoring the protective grounding switch to the working position.
Wherein, in one embodiment, disconnecting the plant power connection and the traction converter ground connection further comprises: disconnecting the workshop power supply, and pulling out the first workshop power supply box key and the second workshop power supply box key; and operating a grounding switch handle of the traction converter, disconnecting the grounding, and pulling out carriage keys corresponding to the carriages.
In one embodiment, the workshop power is disconnected, and workshop power keys D1, D2 are pulled out; and operating a traction converter grounding switch handle, disconnecting the grounding, and pulling out the keys C1-C6.
In one embodiment, restoring the protective grounding switch to the working position further comprises: the compartment keys corresponding to each compartment, the first compartment power box key and the second compartment power box key are all inserted into the third key box assembly, the first grounding key and the second grounding key are pulled out and are respectively inserted into the first protection grounding switch and the second protection grounding switch, the switch handle is operated to protect the grounding switch to a working position (non-grounding), and the first key and the second key are reported out.
In one embodiment, keys C1-C6 and keys D1, D2 are inserted into key box 3, and key B1 and key B2 are extracted; the key B1 and the key B2 are inserted into the protection earthing switches 1 and 2, respectively, the switch handle is operated to move the protection earthing switches to the working position (non-earthing), and the key a1 and the key a2 are pulled out.
In one embodiment, restoring the protective grounding switch to the working position comprises: insert first key to first key case subassembly for first stop valve switches on, inserts the second key to second key case subassembly, makes the second stop valve switch on, and each pantograph resumes the air feed.
In one embodiment, key a1 is inserted into key box 1 to allow shutoff valve a1 to be opened, key a2 is inserted into key box 2 to allow shutoff valve a2 to be opened, and the pantograph is returned to supply air.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of the electronic device are merely illustrative, and units illustrated as separate components may or may not be physically separate, and components displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods of the various embodiments or some parts of the embodiments.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (11)
1. A high-voltage interlock protection device for a rail vehicle, comprising: the key box comprises a first key box assembly, a second key box assembly, a third key box assembly, a first protection grounding switch assembly and a second protection grounding switch assembly;
the first key box component corresponds to the first protection grounding switch and is used for controlling the lifting of the corresponding pantograph; the second key box component corresponds to the second protection grounding switch and is used for controlling the lifting of the corresponding pantograph;
wherein the third key box component corresponds to the first protection grounding switch, the second protection grounding switch, the converter corresponding to the workshop power supply and each carriage and is used for controlling the interlocking protection of each stage of circuit among the corresponding protection grounding switch, the corresponding traction converter grounding switch and the workshop power supply,
the first key box assembly comprises a first key and a first stop valve, the second key box assembly comprises a second key and a second stop valve, the first protection grounding switch assembly comprises a first lock and a first grounding key, the first lock corresponds to the first key of the first key box assembly, the second protection grounding switch assembly comprises a second lock and a second grounding key, the second lock corresponds to the second key of the second key box assembly, and the third key box assembly comprises a first grounding lock, a second grounding lock, a first inter-vehicle power box key, a second inter-vehicle power box key and a plurality of carriage keys corresponding to all carriages; the first grounding lock corresponds to a first grounding key, the second grounding lock corresponds to a second grounding key, the first inter-vehicle power box key corresponds to a first inter-vehicle power box, and the second inter-vehicle power box key corresponds to a second inter-vehicle power box; the corresponding car keys of the plurality of cars correspond to the converter locks of the plurality of cars.
2. The high-voltage interlock protection device for a railway vehicle according to claim 1, wherein a first cut-off valve is disposed between a car pantograph and a corresponding auxiliary air compressor in correspondence with a first key; the second stop valve corresponds to a second key, and is disposed between the cabin pantograph and the corresponding auxiliary air compressor.
3. The high voltage interlock protection device for a railway vehicle of claim 1, wherein the first and second protective earthing switch assemblies comprise: the bidirectional circuit is respectively connected to the inverter and the rectifier, and two ends of the bidirectional circuit are respectively connected with direct-current voltage and are respectively grounded through the two switches.
4. A car body characterized by comprising a high-voltage interlock protection device for a rail car according to any one of claims 1 to 3.
5. An interlock protection method for a high-voltage interlock protection device for a railway vehicle according to any one of claims 1 to 3, comprising:
disconnecting the pantograph gas circuit, turning the protective grounding switch to a grounding position, grounding the traction converter grounding switch, and switching on a workshop power supply; and/or
Disconnecting the workshop power supply connection and the traction converter grounding connection, restoring the protective grounding switch to the working position, and restoring the protective grounding switch to the working position.
6. The method of claim 5, wherein said disconnecting a pantograph gas circuit comprises:
disconnecting the first stop valve to lower the pantograph of the corresponding carriage, and pulling out the first key from the first key box assembly;
the second shut-off valve is opened to allow the corresponding car pantograph to descend and the second key is removed from the second key box assembly.
7. The method of claim 6, wherein turning the protective grounding switch to a ground position comprises:
inserting a first key into a first lock corresponding to the first protection grounding switch, operating a protection grounding switch handle, closing the first protection grounding switch, and pulling out the first grounding key;
and inserting a second key into a second lock corresponding to the second protection grounding switch, operating a protection grounding switch handle, closing the second protection grounding switch and extracting the second grounding key.
8. The method of claim 7, wherein grounding the traction converter grounding switch and turning on the plant power further comprises:
simultaneously inserting the first grounding key and the second grounding key into a third key box component, and pulling out the carriage keys corresponding to all carriages, the first workshop power box key and the second workshop power box key;
inserting a carriage key of each carriage into a traction converter grounding switch, and operating a switch handle to enable a middle current loop of the traction converter to be grounded;
and respectively inserting the first workshop power box key and the second workshop power box key into corresponding workshop power, and opening the workshop power lock cover to enable the workshop power connector to be connected to an external power socket.
9. The method of claim 5, wherein disconnecting the plant power connection and the traction converter ground connection further comprises:
disconnecting the workshop power supply, and pulling out the first workshop power supply box key and the second workshop power supply box key; and operating a grounding switch handle of the traction converter, disconnecting the grounding, and pulling out carriage keys corresponding to the carriages.
10. The method of claim 9, wherein restoring the protective grounding switch to the working position further comprises:
the compartment keys corresponding to the compartments, the first compartment power box key and the second compartment power box key are all inserted into the third key box assembly, the first grounding key and the second grounding key are pulled out, the first protection grounding switch and the second protection grounding switch are respectively inserted, the switch handle is operated to protect the grounding switch to a working position, and the first key and the second key are reported.
11. The method of claim 10, wherein restoring the protective grounding switch to the working position comprises:
insert first key to first key case subassembly for first stop valve switches on, inserts the second key to second key case subassembly, makes the second stop valve switch on, and each pantograph resumes the air feed.
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| CN201910654239.3A CN110435483B (en) | 2019-07-19 | 2019-07-19 | High-voltage interlocking protection device and method for railway vehicle |
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| CN201910654239.3A CN110435483B (en) | 2019-07-19 | 2019-07-19 | High-voltage interlocking protection device and method for railway vehicle |
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| CN110435483B true CN110435483B (en) | 2021-02-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111487558B (en) * | 2020-04-02 | 2022-09-13 | 中车青岛四方机车车辆股份有限公司 | Fault positioning device and method for high-voltage system of train |
| CN113650503B (en) * | 2021-09-27 | 2023-02-03 | 中车大同电力机车有限公司 | High-voltage interlocking electrical protection system, protection method and electric locomotive |
| CN116674382A (en) * | 2023-06-09 | 2023-09-01 | 中车青岛四方机车车辆股份有限公司 | High-voltage interlocking protection device and method for rail vehicle and rail vehicle |
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| CN110435483A (en) | 2019-11-12 |
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Effective date of registration: 20211202 Address after: No. 527, Shimu Road, Xindu District, Chengdu, Sichuan 610511 Patentee after: CRRC CHENGDU Co.,Ltd. Patentee after: CRRC Qingdao Sifang Rolling Stock Co., Ltd Address before: Chengyang District of Shandong city of Qingdao province Jinhong road 266111 No. 88 Patentee before: CRRC QINGDAO SIFANG Co.,Ltd. |