CN112683514B - Circuit breaker mechanical characteristic testing method and device based on sound wave signals - Google Patents
Circuit breaker mechanical characteristic testing method and device based on sound wave signals Download PDFInfo
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Abstract
The invention provides a method and a device for testing mechanical characteristics of a circuit breaker based on sound wave signals, and belongs to the technical field of electric power detection. The test method comprises the following steps: two sound collection units are arranged beside the circuit breaker at intervals and are used for collecting opening and closing sounds emitted by each circuit breaking unit in the circuit breaker; respectively calibrating the distance between each circuit breaking unit and each sound acquisition unit; starting a sound acquisition unit to carry out sound detection; when opening and closing sounds are collected, the obtained sound signals are decomposed into independent sound signals, and the independent sound signals are sounds emitted when the opening and closing units are opened and closed; associating each independent sound signal with a circuit breaking unit; and acquiring the closing synchronism or the opening synchronism of the circuit breaker according to the occurrence time of each independent sound signal. The invention can realize the test of the mechanical property of the circuit breaker without modifying the original equipment, and the obtained parameters are closer to the actual conditions.
Description
Technical Field
The invention belongs to the technical field of electric power detection, and particularly relates to a method and a device for testing mechanical characteristics of a circuit breaker based on sound wave signals.
Background
The sound waves are generated by object vibration, and can be transmitted through a medium and be perceived by human or animal auditory organs. The sound wave contains a large amount of information of the sound source, and the state of the sound source can be effectively grasped by extracting the information. In the industrial field, monitoring the operation state of the equipment by sound and identifying the fault condition of the equipment are also greatly developed. The detection technology based on the acoustic wave signals is mainly applied to high precision fields such as nuclear industry, aerospace and the like in the 60 s, gradually expands to industries such as ships, petrifaction and metallurgy in the 70 s, and expands to various industries in the 80 s.
In a power system, sound wave signals sent by power equipment are researched, effective information contained in the sound wave signals is fully utilized, and detection means of the power equipment can be further expanded and updated. For the circuit breaker, in the switching-on and switching-off process, abundant sound information is contained, the operation state of the circuit breaker can be effectively reflected through analysis of the sound information, and compared with a power failure example test, the switching-on and switching-off characteristic of the circuit breaker is more consistent with the actual operation working condition.
According to patent document CN110426192A, an acoustic fingerprint detection system of a circuit breaker is provided, which comprises a main control module, a signal acquisition module and a data storage module, wherein the signal acquisition module comprises an acquisition card, a sound signal acquisition unit and a current signal acquisition unit, the acquisition card is used for controlling under the control of the main control module, the sound signal acquisition unit and the current signal acquisition unit are respectively used for carrying out synchronous acquisition on mechanical vibration signals and current signals, and the main control module is also used for carrying out comparison analysis on the acquired signals so as to acquire acoustic fingerprint characteristic parameters representing mechanical states and sending the acoustic fingerprint characteristic parameters to the data storage module for storage. The patent simultaneously proposes to judge the mechanical state and the mechanical fault of the circuit breaker equipment through the analysis of the vibration signal and the current signal which are synchronously collected, but the patent only proposes related ideas, and does not mention how to realize the judgment of the mechanical state of the circuit breaker.
For another example, patent document CN111044272A proposes a method for testing mechanical characteristics of a high-voltage circuit breaker based on big data technology, which includes the following steps: a) Installing a networked recording device and a remote control sound generator; b) Obtaining a distance calibration function; c) In the switching-on and switching-off process, sound waves with different frequencies are emitted, and the networked sound recording device is started to record and upload sound data; d) Analyzing the sound data to obtain the frequency change of the sound signal, and obtaining the displacement of the networked sound recording device according to the frequency change and the distance calibration function; e) And obtaining the displacement of the mechanical motion part in the switching-on and switching-off process so as to obtain the mechanical characteristic test result of the high-voltage circuit breaker. The invention reflects the displacement condition of the mechanical moving part of the high-voltage circuit breaker according to the change of the sound frequency, obtains the displacement of the mechanical moving part in the opening and closing test and completes the test of the mechanical characteristics of the high-voltage circuit breaker. However, the networked recording device of this patent needs to be installed on a mechanical moving part of the circuit breaker, the remote control sound generator needs to be installed in a housing of the circuit breaker, the circuit breaker needs to be disassembled and assembled during installation, the installation is inconvenient, and a sensor installed on the circuit breaker may have adverse effects on the structure, the insulation characteristic, the mechanical characteristic and the like of the circuit breaker.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method and a device for testing the mechanical characteristics of a circuit breaker based on sound wave signals, aiming at the defects of the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a method for testing mechanical characteristics of a circuit breaker based on acoustic wave signals comprises the following steps:
the method comprises the following steps that S1, two sound collection units are arranged beside a circuit breaker at intervals and used for collecting opening and closing sounds emitted by each circuit breaking unit in the circuit breaker;
s2, respectively calibrating the distance between each circuit breaking unit and each sound acquisition unit;
s3, starting a sound acquisition unit to carry out sound detection;
s4, after the opening and closing sound is collected, the obtained sound signal is decomposed into independent sound signals, and the independent sound signals are the sound emitted when each circuit breaking unit is opened and closed;
s5, associating each independent sound signal with a circuit breaking unit;
and S6, acquiring the closing synchronism or the opening synchronism of the circuit breaker according to the occurrence time of each independent sound signal.
Further:
the step S3 is as follows: when the circuit breaker switching-on loop is detected to be electrified, the switching-on starting time is obtained, when the circuit breaker switching-off loop is detected to be electrified, the switching-off starting time is obtained, and meanwhile, the sound acquisition unit is started to carry out sound detection;
the step S6 is as follows: and acquiring the switching-on synchronism or the switching-off synchronism of the circuit breaker according to the occurrence time of each independent sound signal, and acquiring the switching-on time or the switching-off time of the circuit breaker.
Further, the method for associating the independent sound signal with the circuit breaking unit comprises the following steps: and according to the time difference between the occurrence moments of the independent sound signals, combining the distance difference between each circuit breaking unit and each sound acquisition unit, and performing association after sound velocity calculation.
Further, the sound velocity is the sound velocity in the current environment, and is calculated after the current environment temperature is introduced.
Furthermore, the distance between the circuit breaking unit and the sound collecting unit is calibrated manually or is acquired automatically by a distance sensor.
A circuit breaker mechanical characteristic testing device based on acoustic signals comprises a detection module and a processing module; the detection module is arranged beside the circuit breaker and consists of two sound acquisition units which are arranged at intervals; the processing module is in signal connection with the detection module and is used for processing the sound signal detected by the detection module.
Furthermore, the processing module is electrically connected with a closing loop and an opening loop of the circuit breaker and is used for detecting the electrifying signals of the closing loop and the opening loop.
Furthermore, the detection module further comprises two distance detection units, and the distance detection units and the sound collection units are arranged at the same positions in a one-to-one mode and are used for acquiring the distance between the sound collection units and the circuit breaking unit.
Further, the detection module further comprises a temperature detection unit for acquiring the current air temperature.
In the process of commissioning and using the circuit breaker, a user needs to perform mechanical characteristic tests regularly according to test rules so as to prevent or find the faults and the abnormalities of the circuit breaker, and the mechanical characteristic tests are important means for measuring and guaranteeing the quality condition and the performance index of the circuit breaker.
The testing of the closing and opening time and the synchronism of the circuit breaker belongs to a part of the mechanical characteristic test of the circuit breaker and is a routine test project of the circuit breaker. The breaker is too long in opening time, the time for removing faults of the breaker can be prolonged, oscillation overvoltage can be caused, the safety of a power grid is greatly threatened, the closing time is too long, reclosing time is prolonged, the power grid can be collapsed, the opening and closing time is too short, too large impact can be caused on contacts when the breaker is opened and closed, the service life of equipment is influenced, the safety operation of the power grid can be greatly damaged due to the asynchronism of the opening and closing, the asynchronous time is too long, the breaker is equivalent to non-full-phase operation, the generated unbalanced current causes malfunction of a relay protection device, the different phase difference of the closing is too large, the normality of a neutral point of the power grid is influenced, and the overvoltage which can damage the safety of the equipment is possible. Therefore, the method has important significance for testing the switching-on and switching-off time of the circuit breaker and measuring the synchronization of switching-on and switching-off through the switching-on and switching-off time.
The conventional test method for the mechanical characteristics of the circuit breaker is to test the circuit breaker by using special equipment such as a circuit breaker mechanical characteristic tester and the like in the power failure state of the equipment. In addition, when the mechanical characteristic test is carried out, the power failure state of the equipment is different from the working condition of the running state, so that the mechanical characteristic test carried out during power failure has deviation from the mechanical characteristic test carried out during the running of the equipment.
Therefore, online monitoring of the mechanical characteristics of circuit breakers is the current direction of research. For the on-line test of the on-off time and the synchronism of the circuit breaker, the on-off coil voltage is monitored, for example, patent document CN100504420C, but the method is limited by the stability of the voltage and has poor test precision; there are also methods of mounting a sensor on a circuit breaker, such as patent documents CN111044272A, CN109270441A, CN103822781A, and CN201681143U, etc., but such methods may have adverse effects on the structure, insulation characteristics, mechanical characteristics, and the like of the circuit breaker.
Based on this, the inventor provides a circuit breaker switching-on and switching-off time testing scheme based on sound signals, considering that the action times of the circuit breaker are reduced, the switching-on time, the switching-off time and the synchronism of the circuit breaker are measured in the running state of equipment, and the mechanical structure of the circuit breaker is not affected. The scheme that provides only needs set up sound collection system around the circuit breaker, when equipment was carried out the power transmission and outage operation, utilizes sound collection system to gather circuit breaker divide-shut brake sound to carry out the analysis to the sound signal who gathers, can reachs the action time of circuit breaker.
The invention has the following beneficial effects:
the sound collecting device is arranged beside the circuit breaker, when the circuit breaker acts, sound signals can be collected, the respective action time of the circuit breaking units can be obtained through filtering and decomposing the sound signals, and the opening and closing time and the synchronism of the circuit breaker can be measured according to the action time difference of the circuit breaking units.
The method is convenient to realize, can be realized without modifying the original equipment, has safety and economy, and the obtained parameters are closer to the mechanical characteristic parameters of the running state of the equipment. The invention can be applied to long-term on-line monitoring of a working site and can also be used for independent measurement during power cut and transmission operation.
The distance sensor is arranged, so that the distance from the breaker can be acquired without manual measurement; the invention is provided with the temperature sensor, can acquire the current air temperature in real time, and can calculate the sound velocity more accurately by utilizing the air temperature, so that the test result of the invention is more accurate.
The invention can realize effective test of the mechanical performance of the circuit breaker, can find accident potential in time during operation and prevent accidents in the bud.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1: schematic block diagram of embodiment 1 of the present invention.
FIG. 2 is a schematic diagram: flow chart of example 1 of the present invention.
FIG. 3: schematic block diagram of embodiment 2 of the present invention.
FIG. 4: flow chart of embodiment 2 of the present invention.
The system comprises a circuit breaker 1, a circuit breaker 11, a first circuit breaking unit 12, a second circuit breaking unit 13, a third circuit breaking unit 14, a closing loop 15, a switching-off loop 2, a processing module 31, a first sound collecting unit 31 and a second sound collecting unit 32.
Detailed Description
For a better understanding of the invention, the following description is given in conjunction with the examples and the accompanying drawings, but the invention is not limited to the examples. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details.
The present description will be described taking as an example a three-phase circuit breaker in which three breaking units are provided, and as shown in fig. 2, the circuit breaker 1 includes a first breaking unit 11, a second breaking unit 12, and a third breaking unit 13.
Example 1:
the purpose of this embodiment is to provide a method for testing mechanical characteristics of a circuit breaker based on an acoustic signal, with reference to fig. 1 and 2, the method includes the following steps:
1. step S1, two sound collection units are arranged beside a circuit breaker at intervals.
The sound collection unit is used for collecting opening and closing sounds emitted by each circuit breaking unit in the circuit breaker and comprises a first sound collection unit 31 and a second sound collection unit 32. In order to ensure the accuracy of the test, the sound acquisition units can be arranged at 200mm-800mm positions beside the circuit breaker, and the distance between the two sound acquisition units is also 200mm-800mm. The sound collecting units are positioned at the same height as the circuit breaking units as much as possible, and the distances between the two sound collecting units and the circuit breaking units are different.
In the correlation formula of the present embodiment, the first breaking unit 11 uses a letteraIndicating that the second breaking unit 12 is in lettersbIndicating that the third breaking unit 13 is in lettercTo show, the first sound collection unit 31 uses lettersmIndicating that the second sound pickup unit 32 uses lettersnAnd (4) showing.
2. And S2, respectively calibrating the distance between each circuit breaking unit and each sound acquisition unit.
This step is used to obtain the distance between the first cut-off unit 11 and the first sound collection unit 31D am And the distance between the first circuit-breaking unit 11 and the second sound collection unit 32D an The distance between the second circuit breaking unit 12 and the first sound collecting unit 31D bm The distance between the second breaking unit 12 and the second sound collection unit 32D bn And the distance between the third breaking unit 13 and the first sound collection unit 31D cm And the distance between the third breaking unit 13 and the second sound collection unit 32D cn . The above distances are all in m.
The acquisition method of the related distance can be manually measured and acquired after the sound acquisition unit is installed, or can be automatically acquired by installing a distance sensor beside the sound acquisition unit.
3. And S3, starting a sound acquisition unit to carry out sound detection.
This step starts the first sound collection unit 31 and the second sound collection unit 32 to perform sound detection.
4. And S4, after the opening and closing sounds are collected, decomposing the acquired sound signals into independent sound signals.
When the breaker completes opening or closing, huge sound can be emitted, and the sound signal collected in the step is the sound signal emitted by the breaker during opening or closing.
The sound signal acquired by a single sound acquisition unit is a synthesized signal of three-phase sounds, including the sounds emitted by three circuit breaking units, and therefore, the acquired sound signal needs to be decomposed into independent sound signals. Before the sound signal is decomposed, the sound signal is firstly subjected to filtering processing to eliminate noise and interference signals in the signal.
For sound signal decomposition, the wave crest of the sound signal waveform can be used as the switching-on and switching-off sound emitted by the circuit breaker, and the collected sound signal is decomposed into independent sound signals by taking the position of the wave crest as the basis. Of course, the atom decomposition algorithm and other existing techniques may also be used, and will not be described herein.
5. And step S5, associating each independent sound signal with the circuit breaking unit.
According to the time difference between the occurrence moments of the independent sound signals, the distance difference between each circuit breaking unit and each sound collecting unit is combined, and correlation is carried out after sound velocity calculation.
In the calculation of the step, the sound velocity (the propagation velocity of sound in air) needs to be determined firstly, and the sound velocity can adopt the common methodThe gauge value is 340m/s, the current air temperature can be introduced, the sound velocity under the current environment is calculated, the unit of the sound velocity of the embodiment adopts m/ms, and the formula of the embodiment uses lettersVRepresenting the speed of sound. The calculation formula of the sound velocity and the temperature is a well-known formula, and is not described herein again.
Next, the distance difference between the single disconnection unit and the two sound collection units is calculated, respectively.
The correlation formula is as follows:
delta in the formula (1)D a Representing the difference in distance, Δ, between the first disconnection unit 11 and the two sound collection unitsD b Representing the difference in distance, delta, between the second breaking unit 12 and the two sound pickup unitsD c Representing the difference in distance between the third breaking unit 13 and the two sound collecting units.
The sound signal acquired by the first sound acquisition unit 31 is processed in step S4 and the decomposed three independent sound signals are used separatelyS m1 、S m2 AndS m3 indicating that the occurrence times of the three independent sound signals are respectivelyT m1 、T m2 AndT m3 represents; the sound signal acquired by the second sound collecting unit 32, and the three separated sound signals decomposed after being processed in step S4 are used respectivelyS n1 、S n2 AndS n3 indicating that the occurrence times of the three independent sound signals are respectivelyT n1 、T n2 AndT n3 and (4) showing.
Next, the time difference between the three independent sound signals collected by the second sound collection unit 32 is calculated from any one of the three independent sound signals collected by the first sound collection unit 31, and the time difference is multiplied by the sound velocity. The unit of the time difference is ms, and the unit of the sound velocity is m/ms.
Such as a second independent sound signal collected by the first sound collecting unit 31S m2 The product of the sound velocity and the time difference between the three independent sound signals collected by the second sound collection unit 32 can be calculated as the following formula (2).
After the calculation of the formula (2) is completed, three calculation results Δ are obtainedD 21 、ΔD 22 And ΔD 23 Are each independently of ΔD a 、ΔD b And ΔD c Comparing, and judging whether the numerical values are consistent or very close; for example, determining ΔD 21 And deltaD c The values are consistent or very close, independent sound signals can be determinedS m2 And independent sound signalS n1 Are all issued by the third breaking unit 13.
In this way all individual sound signals can be associated with a single breaking unit.
6. And S6, acquiring the closing synchronism or the opening synchronism of the circuit breaker according to the occurrence time of each independent sound signal.
The closing synchronism of the circuit breaker refers to the degree of different stages of closing time of each breaking unit when the circuit breaker is closed, and is represented by the difference value between the maximum value and the minimum value of the closing time of each breaking unit; the opening synchronization of the circuit breaker refers to the degree of different opening time periods of the circuit breaker units when the circuit breaker is opened, and is represented by the difference value between the maximum value and the minimum value of the opening time periods of the circuit breaker units.
The following correlation results in step S5 are taken as an example for explanation: the first breaking unit 11 correlates the independent sound signalS m1 AndS n3 the second breaking unit 12 is associated with an independent sound signalS m3 AndS n2 first, ofThree breaking units 13 are associated with independent sound signalsS m2 AndS n1 。
according to the correlation result, the sound velocity is used for calculating the time when the circuit breaking unit makes a sound, and the time is the action time when the circuit breaking unit is switched on or switched off. The correlation formula is as follows:
in the formula (3)T a Indicates the operation timing of the first breaking unit 11,T b indicating the moment of action of the second breaking unit 12,T c the operation timing of the third disconnecting means 13 is shown.
Closing synchronism of circuit breaker for completing closing and opening synchronism of circuit breaker for completing openingP t Can be calculated according to the following formula:
this embodiment sets up sound collection unit by the circuit breaker, realizes the test to circuit breaker divide-shut brake synchronism through sound wave signal.
It should be noted that, the reference numbers of the related steps in this embodiment do not represent the execution sequence, and those skilled in the art may change the sequence of the above steps without departing from the protection scope of the present invention.
Example 2:
referring to fig. 3 and 4, the method for testing the mechanical characteristics of the circuit breaker based on the acoustic wave signal provided in this embodiment is based on embodiment 1, and the following improvements are performed in step S3 and step S6:
and step S3: when the circuit breaker closing loop 14 is detected to be electrified, the closing starting time is obtained, and when the circuit breaker opening loop 15 is detected to be electrified, the opening starting time is obtained, and meanwhile, the sound acquisition unit is started to perform sound detection.
When the closing loop 14 of the circuit breaker 1 starts to be electrified from a power-off state, the circuit breaker 1 starts to perform closing operation, and when the opening loop 15 starts to be electrified from the power-off state, the circuit breaker 1 starts to perform opening operation.
The method comprises the steps that the electrifying conditions of a closing loop 14 and an opening loop 15 are continuously monitored, when the condition that the closing loop 14 is electrified is detected, the current time is obtained, and the current time is stored as the closing starting time; when the power-on of the opening loop 15 is detected, the current time is obtained and stored as the opening starting time. Used in the formula of the embodimentT 0 Indicating the closing start time or the opening start time.
At the same time, the first sound collection unit 31 and the second sound collection unit 32 are activated to perform sound detection.
Step S6: and acquiring the closing synchronism or the opening synchronism of the circuit breaker according to the occurrence time of each independent sound signal, and acquiring the closing time or the opening time of the circuit breaker.
The method for acquiring the closing synchronism or the opening synchronism of the circuit breaker is the same as the step S6 in the embodiment 1.
The closing time of the circuit breaker refers to the time interval from the live time of the closing loop 14 to the completion of the contact of the contacts of all the circuit breaking units of the circuit breaker at the opening position; the breaker opening time refers to the time interval from the moment when the opening loop 15 is electrified to the moment when the contacts of all the breaking units are separated when the breaker is in the closing position.
The closing time for completing closing and the opening time for completing opening of the circuit breaker can be calculated according to the following formulas:
in the formula (5)T 0 The closing start time or the opening start time obtained in step S3 of the present embodiment is shown,P s indicating the closing time or the opening time.
Compared with embodiment 1, the embodiment can simultaneously realize the test of the opening and closing time of the circuit breaker by acquiring the electrifying time of the closing coil or the opening coil.
Example 3:
the purpose of this embodiment is to provide a circuit breaker mechanical characteristic testing device based on acoustic wave signal, refer to fig. 2, the testing device includes a detection module and a processing module 2; the detection module is arranged beside the circuit breaker 1 and consists of a first sound acquisition unit 31 and a second sound acquisition unit 32, and the first sound acquisition unit 31 and the second sound acquisition unit 32 are arranged at intervals and are in signal connection with the processing module 2. In specific implementation, the first sound collection unit 31 and the second sound collection unit 32 can be implemented by sound sensors such as sound pickup.
In order to ensure the accuracy of the test, the sound acquisition units can be arranged at 200mm-800mm positions beside the circuit breaker, and the distance between the two sound acquisition units is also 200mm-800mm. The sound collection units should be located at the same height as the circuit breaking unit as much as possible, and the distance between the two sound collection units and the circuit breaking unit should be different.
The processing module 2 is configured to process the sound signal detected by the detection module, and in specific implementation, the processing module 2 may be implemented by a single chip or other processor chips.
The test apparatus provided in this embodiment can perform the test method described in embodiment 1.
Example 4:
referring to fig. 4, the circuit breaker mechanical characteristic testing apparatus based on acoustic wave signals provided in this embodiment is improved based on embodiment 3 as follows: the processing module 2 is also electrically connected with a closing loop 14 and an opening loop 15 in the circuit breaker 1, and can acquire the energizing signals of the closing loop 14 and the opening loop 15.
The testing apparatus provided in this embodiment can perform the testing method as described in embodiment 2.
Example 5:
the circuit breaker mechanical characteristic testing device based on the acoustic wave signal provided by the embodiment is improved on the basis of the embodiment 4 as follows: the detection module is also provided with a distance detection unit which comprises a first distance detection unit and a second distance detection unit which are in signal connection with the processing module 2; the first distance detection unit and the first sound collection unit 31 are arranged at the same position, and the second distance detection unit and the second sound collection unit 32 are arranged at the same position.
The distance detection unit is used for automatically acquiring distances from the three circuit breaking units, namely acquiring the distances between the first sound acquisition unit 31 and the three circuit breaking units, and acquiring the distances between the second sound acquisition unit 32 and the three circuit breaking units.
In specific implementation, the distance detection unit can be implemented by using an ultrasonic sensor, a laser sensor, an infrared sensor, a microwave radar sensor and other sensors.
Example 6:
the circuit breaker mechanical characteristic testing device based on the acoustic wave signal provided by the embodiment is improved on the basis of the embodiment 5 in the following way: the detection module is also provided with a temperature detection unit, and the temperature detection unit is in signal connection with the processing module 2 and is used for detecting the ambient temperature and acquiring the current temperature of the air.
The sound has different propagation speeds in the air with different temperatures, so that the sound velocity under the current environment can be calculated by utilizing the air temperature, and the test result of the invention is more accurate.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited, and other modifications or equivalent substitutions made by the technical solutions of the present invention by the persons skilled in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (5)
1. A method for testing mechanical characteristics of a circuit breaker based on sound wave signals is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps that S1, two sound collection units are arranged beside a circuit breaker at intervals and used for collecting opening and closing sounds emitted by each circuit breaker unit in the circuit breaker, and the distances between the two sound collection units and the circuit breaker are different;
s2, respectively calibrating the distance between each circuit breaking unit and each sound acquisition unit;
s3, starting a sound acquisition unit to carry out sound detection;
s4, after the opening and closing sound is collected, the obtained sound signal is decomposed into independent sound signals, and the independent sound signals are the sound emitted when each circuit breaking unit is opened and closed;
s5, associating each independent sound signal with the circuit breaking unit, wherein the association method comprises the following steps: according to the time difference between the occurrence moments of the independent sound signals, combining the distance difference between each circuit breaking unit and each sound collecting unit, and performing association after sound velocity calculation;
and S6, acquiring the closing synchronism or the opening synchronism of the circuit breaker according to the occurrence time of each independent sound signal.
2. The method of claim 1, wherein the method comprises:
the step S3 is as follows: when the circuit breaker switching-on loop is detected to be electrified, the switching-on starting time is obtained, when the circuit breaker switching-off loop is detected to be electrified, the switching-off starting time is obtained, and meanwhile, the sound acquisition unit is started to carry out sound detection;
the step S6 is as follows: and acquiring the closing synchronism or the opening synchronism of the circuit breaker according to the occurrence time of each independent sound signal, and acquiring the closing time or the opening time of the circuit breaker.
3. The method of claim 1, wherein the method comprises: the sound velocity is the sound velocity in the current environment and is obtained by calculation after the current environment temperature is introduced.
4. The method of claim 1, wherein the method comprises: the distance between the circuit breaking unit and the sound collecting unit is calibrated manually or acquired automatically by a distance sensor.
5. A circuit breaker mechanical characteristic testing device based on acoustic wave signals, which is used for executing the testing method of any one of claims 1-4, and is characterized in that: comprises a detection module and a processing module; the detection module is arranged beside the circuit breaker and consists of two sound acquisition units which are arranged at intervals; the processing module is in signal connection with the detection module, is used for processing the sound signal detected by the detection module and is used for associating the independent sound signal with the circuit breaking unit;
the distances between the two sound acquisition units and the circuit breaker are different;
the processing module is also electrically connected with a closing loop and an opening loop of the circuit breaker and used for detecting the electrifying signals of the closing loop and the opening loop;
the detection module also comprises two distance detection units, and the distance detection units and the sound acquisition units are arranged at the same position in a one-to-one manner and are used for acquiring the distance between the sound acquisition units and the circuit breaking unit;
the detection module further comprises a temperature detection unit for acquiring the current air temperature.
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| CN103822781A (en) * | 2014-03-14 | 2014-05-28 | 云南电力试验研究院（集团）有限公司电力研究院 | Mechanical property detection method of non-contact breaker |
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| CN107884707B (en) * | 2017-09-30 | 2018-12-21 | 杨启蓓 | High-voltage circuit-breaker switching on-off time on-Line Monitor Device and method |
| JP6438365B2 (en) * | 2015-08-25 | 2018-12-12 | 株式会社日立製作所 | Circuit breaker system |
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| CN109270441B (en) * | 2018-07-17 | 2021-03-19 | 国网浙江省电力有限公司检修分公司 | High-voltage circuit breaker opening characteristic parameter online detection method based on vibration signal |
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| CN212207592U (en) * | 2019-10-12 | 2020-12-22 | 南宁开关宝智能技术有限公司 | Artificial intelligence high voltage circuit breaker on-line monitoring device |
| CN111044272B (en) * | 2019-11-14 | 2022-03-15 | 国网浙江省电力有限公司嘉兴供电公司 | High-voltage circuit breaker mechanical characteristic test method and device based on big data technology |
| CN111239599B (en) * | 2020-01-17 | 2021-12-03 | 四川明星电力股份有限公司 | On-line monitoring device and method for opening and closing time of circuit breaker |
| CN111796180A (en) * | 2020-06-23 | 2020-10-20 | 广西电网有限责任公司电力科学研究院 | Automatic identification method and device for mechanical fault of high-voltage switch |
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Address after: No.40, Huaihe Road, Zhongyuan District, Zhengzhou City, Henan Province 450006 Applicant after: Super high voltage company of State Grid Henan Electric Power Co. Applicant after: STATE GRID CORPORATION OF CHINA Address before: No.40, Huaihe Road, Zhongyuan District, Zhengzhou City, Henan Province 450006 Applicant before: MAINTENANCE COMPANY OF STATE GRID HENAN ELECTRIC POWER Co. Applicant before: STATE GRID CORPORATION OF CHINA |
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