CN117192353A - Online detection device for mechanical transmission performance of high-voltage switch - Google Patents
Online detection device for mechanical transmission performance of high-voltage switch Download PDFInfo
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Abstract
The application provides an on-line detection device for mechanical transmission performance of a high-voltage switch, which comprises: the detection unit is used for detecting a switching-on/switching-off coil control instruction and a spindle in-place signal of the high-voltage switch; the timing unit is used for respectively timing the control instruction and the spindle in-place signal; the comparison unit is used for judging that the action duration of the switch main shaft of the high-voltage switch on the control instruction is abnormal based on a preset action duration reference value, and generating a warning signal; the warning unit is used for generating warning information according to the warning signal. The application extracts the on-off signal of the on-off command of the high-voltage switch as the starting time of the action of the breaker and takes the in-place signal of the switch main shaft as the ending time of the action of the breaker, thereby judging that the action duration of the switch main shaft of the high-voltage switch is abnormal, realizing the on-line detection of the high-voltage switch, judging whether the mechanical property of the switch is deteriorated in real time and determining whether the switch is in off-line processing through the threshold setting.
Description
Technical Field
The application relates to the technical field of high-voltage switch detection, in particular to an on-line detection device for mechanical transmission performance of a high-voltage switch.
Background
The high-voltage switch is divided into a high-voltage circuit breaker and a high-voltage contact breaker, wherein the high-voltage circuit breaker is suitable for occasions requiring a certain breaking capacity of the switch, and the high-voltage contact breaker is suitable for occasions requiring frequent operation of the switch. Regardless of the application of the high-voltage switch to any occasion, the refusing of the switch caused by the mechanical transmission fault can bring serious consequences to the personal and equipment safety. The control command of the high-voltage switch is generally from two aspects, namely normal operation of the switch, such as start and stop of a motor; and relay protection power-off, such as line short circuit, grounding and the like. The transmission of the high-voltage switch can be up to four steps: and 1, receiving an opening and closing instruction, 2, mechanically driving, 3, performing opening and closing actions, 4, storing energy by a switch, and preparing for the next mechanical driving of the switch. Under normal conditions, the on-off time of the switch is basically fixed, and the discreteness is not large.
In the course of conception and implementation of the present application, the applicant has found at least the following technical problems: the state of the high voltage switch itself is generally grasped by performing a periodic off-line preventive test according to DL/T596 power equipment preventive test procedure. The offline test has a lot of contents, and one important item is to detect the opening and closing time of the switch so as to verify whether the mechanical transmission of the switch is smooth. The period of the off-line test is typically 3-6 years (and some users do not do so for any reason, longer than this period of time or for a long period of time), during which the switch is on-line and no further tests can be performed on the switch by the user. However, during this period, due to the aging, environment, frequent operation, lubrication and other factors of the switch, the mechanical transmission performance of the switch is reduced, and even the switch is in a dead state.
Disclosure of Invention
In order to alleviate the above problems, the present application provides an on-line detection device for mechanical transmission performance of a high-voltage switch, including:
the signal detection end of the detection unit is connected with the control end of the high-voltage switch and is used for receiving a control instruction of the high-voltage switch; the main shaft in-place contact detection end of the detection unit is connected with a switch main shaft of the high-voltage switch and is used for detecting a main shaft in-place signal of the high-voltage switch;
the timing unit is connected with the detection unit and used for respectively timing the control instruction and the spindle in-place signal;
the comparison unit is connected with the timing unit and is used for judging that the action duration of the switch main shaft of the high-voltage switch on the control instruction is abnormal based on a preset action duration reference value and generating an alarm signal;
and the warning unit is connected with the comparison unit and is used for generating warning information according to the warning signal.
Optionally, the signal detection end is divided into a first detection end and a second detection end, the preset action time reference value comprises a switching-on reference value and a switching-off reference value, and the control instruction comprises a switching-off instruction and a switching-on instruction;
the first detection end is connected with a control end of a high-voltage switch opening coil loop and is used for receiving an opening instruction of the high-voltage switch;
the second detection end is connected with the control end of the high-voltage switch closing coil loop and is used for receiving a closing instruction of the high-voltage switch;
and the comparison unit generates the warning signal when judging that the action duration of the high-voltage switch on the switching-on instruction and/or the switching-off instruction is abnormal.
Optionally, the on-line detection device for the mechanical transmission performance of the high-voltage switch further comprises an in-place auxiliary contact;
the main shaft in-place contact detection end of the detection unit is connected with a switch main shaft of the high-voltage switch through the in-place auxiliary contact so as to detect a main shaft in-place signal of the high-voltage switch.
Optionally, the on-line detection device for mechanical transmission performance of the high-voltage switch further comprises a photoelectric coupling loop, the photoelectric coupling loop is connected between the detection unit and the timing unit, and the photoelectric coupling loop is used as an isolation channel to isolate the detection unit from the timing unit, so that loops before and after isolation do not affect each other.
Optionally, the on-line detection device for the mechanical transmission performance of the high-voltage switch further comprises a filtering unit, and the filtering unit is connected between the photoelectric coupling loop and the timing unit for resistance-capacitance filtering.
Optionally, the time constant of the resistive-capacitive filtering is 1ms.
Optionally, the on-line detection device for mechanical transmission performance of the high-voltage switch further comprises a debounce unit, wherein the debounce unit is connected between the filtering unit and the timing unit, so as to shield false signal interference caused by switch bounce or power supply fluctuation.
Optionally, when the effective duration of the signal is less than the preset duration, the debouncing unit determines that the corresponding signal is a false signal.
Optionally, the preset time length takes a value of 5-10ms.
Optionally, the on-line detection device for the mechanical transmission performance of the high-voltage switch further comprises a storage unit and/or a display unit, wherein the storage unit is used for storing the switch action time data of the high-voltage switch, and the display unit is used for displaying the switch action time data.
The application extracts the on-off signals of the on-off command of the high-voltage switch as the starting time of the action of the breaker and takes the in-place signals of the switch main shaft as the ending time of the action of the breaker, thereby judging that the action duration of the switch main shaft of the high-voltage switch on the control command is abnormal, realizing the on-line detection of the on-off time of the high-voltage breaker, integrally judging whether the mechanical property of the switch is deteriorated and determining whether the switch is in off-line processing through the threshold setting.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a block diagram of an on-line inspection apparatus according to an embodiment of the present application.
Fig. 2 is a schematic connection diagram of an on-line detection device for mechanical transmission performance of a high-voltage switch according to an embodiment of the application.
FIG. 3 is a timing diagram of signal timing according to an embodiment of the application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The application provides an on-line detection device for mechanical transmission performance of a high-voltage switch, and fig. 1 is a block diagram of the on-line detection device according to an embodiment of the application.
As shown in fig. 1, in an embodiment, the on-line detection device for mechanical transmission performance of a high-voltage switch includes a detection unit 1, a timing unit 2, a comparison unit 3 and a warning unit 4.
The signal detection end of the detection unit 1 is connected with the control end of the high-voltage switch and is used for receiving a control instruction of the high-voltage switch; and a main shaft in-place contact detection end of the detection unit 1 is connected with a switch main shaft of the high-voltage switch and is used for detecting a main shaft in-place signal of the high-voltage switch.
The timing unit 2 is connected with the detection unit 1 and is used for respectively timing the control instruction and the spindle in-place signal.
The comparing unit 3 is connected with the timing unit 2, and is configured to determine, based on a preset action duration reference value, when the action duration of the switch main shaft of the high-voltage switch on the control instruction is abnormal, to generate an alarm signal.
And the warning unit 4 is connected with the comparison unit 3 and is used for generating warning information according to the warning signal.
The detection unit 1 extracts the on-off signals of the on-off command of the high-voltage switch as the starting time of the action of the breaker, and takes the in-place signal of the switch main shaft as the ending time of the action of the breaker, so that the abnormal action duration of the switch main shaft of the high-voltage switch on the control command is judged, the on-line detection of the on-off time of the high-voltage breaker is realized, whether the mechanical characteristics of the switch are deteriorated or not can be integrally judged, and whether the switch is in off-line processing or not is determined through threshold setting.
Optionally, the signal detection end is divided into a first detection end and a second detection end, the preset action time length reference value comprises a switching-on reference value and a switching-off reference value, and the control instruction comprises a switching-off instruction and a switching-on instruction.
The first detection end is connected with a control end of a high-voltage switch opening coil loop and is used for receiving an opening instruction of the high-voltage switch.
The second detection end is connected with the control end of the high-voltage switch closing coil loop and is used for receiving a closing instruction of the high-voltage switch.
The comparison unit 3 generates the warning signal when judging that the action duration of the high-voltage switch on the switching-on instruction and/or the switching-off instruction is abnormal.
The preset action duration reference value may be a switching-on/off history value of the high-voltage switch or a factory standard value of a factory, or may be a certain appropriate reference value set by a test result. In the working process, the comparison unit 3 compares the counted closing time or opening time with a preset time reference value, and if the counted closing time or opening time exceeds the preset time reference value, an abnormal warning signal is output.
Fig. 2 is a schematic connection diagram of an on-line detection device for mechanical transmission performance of a high-voltage switch according to an embodiment of the application.
Referring to fig. 2, for example, a detection unit 1 is used to take a brake opening command signal a and a brake closing command signal C of a switch, a spring power mechanism is triggered to release energy through a brake opening (brake opening) coil, a transmission mechanism is used to push a switch main shaft to close a brake opening moving contact, a signal B of the switch main shaft moving contact in place is obtained, the action time periods of the brake opening action process a-B and the brake closing action process C-B cover the whole mechanical transmission process of the switch, whether the brake opening and closing coil is used for storing energy, or the spring stores energy, or other transmission units such as dead points, connecting rods and the like have problems (such as gaps, jams and the like), and whether the switch has problems can be judged according to the time drift trend; in this embodiment, no current transformer or capacitive high voltage detection device is required, and fewer detection elements are used, so that it is possible to determine whether the mechanical characteristics of the switch are degraded as a whole and determine whether the switch is taken off line by threshold setting.
FIG. 3 is a timing diagram of signal timing according to an embodiment of the application.
Referring to fig. 2 and 3, the timing unit 2 determines when the switching-off operation process a signal→the switching-on operation process B signal, and the switching-on operation process C signal→the switching-on operation process B signal are counted during timing. Illustratively, the on-off time of the high-voltage switch is normally in the order of tens of milliseconds, so the timing accuracy of the device should not be less than the order of 0.1 ms.
With continued reference to fig. 2, optionally, the on-line detection device for mechanical transmission performance of the high-voltage switch further includes an in-place auxiliary contact.
The main shaft in-place contact detection end of the detection unit 1 is connected with a switch main shaft of the high-voltage switch through the in-place auxiliary contact so as to detect a main shaft in-place signal of the high-voltage switch.
As shown in fig. 2, the main contact and the in-place auxiliary contact are arranged on the transmission main shaft at the same angle and direction, so that the main contact and the in-place auxiliary contact can synchronously act. When the main contact performs a closing or opening action, the in-place auxiliary contact performs the same action as the main contact at the same angle and direction. Thus, the detection unit 1 can accurately detect the closing or opening operation of the main contact by detecting the operation time of the switch main shaft by the auxiliary contact in place.
Optionally, the on-line detection device for mechanical transmission performance of the high-voltage switch further comprises a photoelectric coupling loop, wherein the photoelectric coupling loop is connected between the detection unit 1 and the timing unit 2, and the photoelectric coupling loop is used as an isolation channel to isolate the detection unit 1 and the timing unit 2, so that loops before and after isolation do not affect each other.
With continued reference to fig. 2, the isolation channels are respectively connected with the switching-off signals of the high-voltage switch a, the switching-on signals of the high-voltage switch B and the switching-on signals of the high-voltage switch C, and isolate the detection circuit on the high-voltage switch side from the timing circuit on the detection device side through the photoelectric coupling loop, so that the circuit loops before and after isolation are not affected.
Optionally, the on-line detection device for the mechanical transmission performance of the high-voltage switch further comprises a filtering unit, and the filtering unit is connected between the photoelectric coupling loop and the timing unit 2 for resistance-capacitance filtering. Illustratively, the time constant of the resistive-capacitive filtering is 1ms.
With continued reference to fig. 2, the filtering unit may perform rc filtering on the isolated A, B, C signal, where the time constant of the rc filtering is related to the power supply capacity of ABC and the line length, and in general, the time constant of the rc filtering may be about 1ms.
Optionally, the on-line detection device for mechanical transmission performance of the high-voltage switch further comprises a debouncing unit, and the debouncing unit is connected between the filtering unit and the timing unit 2 to shield false signal interference caused by switch bounce or power supply fluctuation.
The debounce unit determines that the corresponding signal is a false signal when the effective duration of the signal is determined to be less than the preset duration. Optionally, the preset time length takes a value of 5-10ms.
Illustratively, the debounce unit may set a pulse width of 5-10ms, and determine that the signal is a spurious signal due to switching bounce or power supply ripple when the signal length of A, B, C is less than the preset duration width. Such spurious signals may be ignored in determining the mechanical actuation performance of the high voltage switch. Illustratively, when the signal length of A, B, C is greater than or equal to the preset duration, the signal may be considered to be a true signal, thereby making a determination of the mechanical actuation performance of the high voltage switch.
Optionally, the on-line detection device for mechanical transmission performance of the high-voltage switch further comprises a storage unit, wherein the storage unit is used for storing switch action time data of the high-voltage switch.
Optionally, the on-line detection device for the mechanical transmission performance of the high-voltage switch further comprises a display unit, wherein the display unit is used for displaying the switch action time data.
For example, in the case where the high-voltage switch is normal, the time of the current switching action may be displayed by the display unit, and the collected closing or opening action data may be stored as a history value by the storage unit. When the abnormal working condition of the high-voltage switch is detected, a warning signal can be displayed for warning display or abnormal information can be sent for warning maintenance personnel for processing; and meanwhile, abnormal data can be stored for data backup.
The application extracts the on-off signals of the on-off command of the high-voltage switch as the starting time of the action of the breaker and takes the in-place signals of the switch main shaft as the ending time of the action of the breaker, thereby judging that the action duration of the switch main shaft of the high-voltage switch on the control command is abnormal, realizing the on-line detection of the on-off time of the high-voltage breaker, integrally judging whether the mechanical property of the switch is deteriorated and determining whether the switch is in off-line processing through the threshold setting.
The foregoing is merely a reference example, and in order to avoid redundancy, it is not necessary to use any combination in practical development or application, but any combination belongs to the technical solution of the present application, and is covered in the protection scope of the present application.
Embodiments of the present application also provide a computer program product comprising computer program code which, when run on a computer, causes the computer to perform the method as in the various possible embodiments described above.
The embodiment of the application also provides a chip, which comprises a memory and a processor, wherein the memory is used for storing a computer program, and the processor is used for calling and running the computer program from the memory, so that the device provided with the chip executes the method in the various possible implementation manners.
It can be understood that the above scenario is merely an example, and does not constitute a limitation on the application scenario of the technical solution provided by the embodiment of the present application, and the technical solution of the present application may also be applied to other scenarios. For example, as one of ordinary skill in the art can know, with the evolution of the system architecture and the appearance of new service scenarios, the technical solution provided by the embodiment of the present application is also applicable to similar technical problems.
It should be noted that, in this document, step numbers such as S10 and S20 are adopted, and the purpose of the present application is to more clearly and briefly describe the corresponding content, and not to constitute a substantial limitation on the sequence, and those skilled in the art may execute S20 first and then execute S10 when implementing the present application, which is within the scope of protection of the present application.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
The steps in the method of the embodiment of the application can be sequentially adjusted, combined and deleted according to actual needs.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, a controlled terminal, or a network device, etc.) to perform the method of each embodiment of the present application.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable devices. The computer instructions may be stored in a storage medium or transmitted from one storage medium to another storage medium, for example, from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line), or wireless (e.g., infrared, wireless, microwave, etc.) means. The storage media may be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that contains an integration of one or more available media. Usable media may be magnetic media (e.g., floppy disks, storage disks, magnetic tape), optical media (e.g., DVD), or semiconductor media (e.g., solid State Disk (SSD)), among others.
It should be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An on-line detection device for mechanical transmission performance of a high-voltage switch, which is characterized by comprising:
the signal detection end of the detection unit is connected with the control end of the high-voltage switch and is used for receiving a control instruction of the high-voltage switch; the main shaft in-place contact detection end of the detection unit is connected with a switch main shaft of the high-voltage switch and is used for detecting a main shaft in-place signal of the high-voltage switch;
the timing unit is connected with the detection unit and used for respectively timing the control instruction and the spindle in-place signal;
the comparison unit is connected with the timing unit and is used for judging that the action duration of the switch main shaft of the high-voltage switch on the control instruction is abnormal based on a preset action duration reference value and generating an alarm signal;
and the warning unit is connected with the comparison unit and is used for generating warning information according to the warning signal.
2. The on-line detection device for mechanical transmission performance of a high-voltage switch according to claim 1, wherein the signal detection end is divided into a first detection end and a second detection end, the preset action time length reference value comprises a closing reference value and a separating brake reference value, and the control instruction comprises a separating brake instruction and a closing brake instruction;
the first detection end is connected with a control end of a high-voltage switch opening coil loop and is used for receiving an opening instruction of the high-voltage switch;
the second detection end is connected with the control end of the high-voltage switch closing coil loop and is used for receiving a closing instruction of the high-voltage switch;
and the comparison unit generates the warning signal when judging that the action duration of the high-voltage switch on the switching-on instruction and/or the switching-off instruction is abnormal.
3. The on-line detection device for mechanical transmission performance of a high-voltage switch according to claim 2, wherein the on-line detection device for mechanical transmission performance of a high-voltage switch further comprises an in-place auxiliary contact;
the main shaft in-place contact detection end of the detection unit is connected with a switch main shaft of the high-voltage switch through the in-place auxiliary contact so as to detect a main shaft in-place signal of the high-voltage switch.
4. The on-line detection device for mechanical transmission performance of high-voltage switch according to claim 3, further comprising a photoelectric coupling loop connected between the detection unit and the timing unit, wherein the photoelectric coupling loop is used as an isolation channel to isolate the detection unit from the timing unit, so that the loops before and after isolation do not affect each other.
5. The on-line detection device for mechanical transmission performance of a high-voltage switch according to claim 4, further comprising a filtering unit connected between the photoelectric coupling circuit and the timing unit for performing resistance-capacitance filtering.
6. The on-line detection device for mechanical transmission performance of a high-voltage switch according to claim 5, wherein the time constant of the resistive-capacitive filter is 1ms.
7. The on-line detection device for mechanical transmission performance of a high voltage switch according to claim 6, further comprising a debounce unit connected between the filter unit and the timing unit to shield false signal interference due to switch bounce or power supply fluctuation.
8. The on-line detection device for mechanical transmission performance of a high-voltage switch according to claim 7, wherein the debouncing unit determines that the corresponding signal is a false signal when determining that the effective duration of the signal is less than a preset duration.
9. The on-line detection device for mechanical transmission performance of a high-voltage switch according to claim 8, wherein the preset time period takes a value of 5-10ms.
10. The on-line detection device for mechanical transmission performance of a high-voltage switch according to any one of claims 1 to 9, further comprising a storage unit for storing switching time data of the high-voltage switch and/or a display unit for displaying the switching time data.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311183704.2A CN117192353A (en) | 2023-09-14 | 2023-09-14 | Online detection device for mechanical transmission performance of high-voltage switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311183704.2A CN117192353A (en) | 2023-09-14 | 2023-09-14 | Online detection device for mechanical transmission performance of high-voltage switch |
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| CN117192353A true CN117192353A (en) | 2023-12-08 |
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| CN202311183704.2A Pending CN117192353A (en) | 2023-09-14 | 2023-09-14 | Online detection device for mechanical transmission performance of high-voltage switch |
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