CN106680701A - Circuit breaker re-ignition phenomenon detection device and method - Google Patents
Circuit breaker re-ignition phenomenon detection device and method Download PDFInfo
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- CN106680701A CN106680701A CN201611065357.3A CN201611065357A CN106680701A CN 106680701 A CN106680701 A CN 106680701A CN 201611065357 A CN201611065357 A CN 201611065357A CN 106680701 A CN106680701 A CN 106680701A
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- radio frequency
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- frequency electromagnetic
- chopper
- electromagnetic signal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0892—Details related to signal analysis or treatment; presenting results, e.g. displays; measuring specific signal features other than field strength, e.g. polarisation, field modes, phase, envelope, maximum value
Abstract
The invention discloses a circuit breaker re-ignition phenomenon detection device and a method. When the brake of a circuit breaker is opened, switching arcs will be generated, and then radio frequency electromagnetic signals will be stimulated and spread all around. When the circuit breaker re-ignition phenomenon detection device works, a receiver is used for receiving the radio frequency electromagnetic signals generated by the switching arcs when the brake of the circuit breaker is opened. A signal processor obtains envelope curve waveforms of the radio frequency electromagnetic signals according to the radio frequency electromagnetic signals, obtains wave crest quantity according to the waveforms and compares the wave crest quantity with preset quantity so as to determine whether a re-ignition phenomenon occurs in the circuit breaker. The radio frequency electromagnetic signals are detected, the receiver is not in direct contact with the circuit breaker and there is no need to install a current sensor, so resources are saved and the detection process and the determination process are allowed to be quite convenient and quick.
Description
Technical field
The present invention relates to power transformation technology field, more particularly to a kind of chopper is restriked phenomenon detection means and method.
Background technology
Primary cut-out plays control action in high-tension circuit, is one of important electric elements in high-tension circuit.Open circuit
Device, breaks rapidly when running into failure condition in the presence of protective relaying device for being switched on or switched off circuit in normal operation
Open circuit, during such as special circumstances on automatic reclosing to faulty line, chopper can reliably connect short circuit current.Chopper
It is quantity power equipment the hugest in electrical network, plays a part of to control and protect, once breaking down, not only directly can lead
Power grid accident is caused, and is also resulted in the expansion of existing accident, huge negative effect is brought to national economy and social stability.
If it happens to restrike in chopper interrupting process and endanger huge to chopper, need to pay close attention to.It is available at present adopting
Mode is by installing special current sensor detection additional.Current sensor, is a kind of detection means, can experience tested electricity
The information of stream, and can the information that experience of detection, be for conversion into according to certain rules the signal of telecommunication that meets certain standard needs or
The information output of other desired forms, is required with meeting transmission, process, storage, display, record and control of information etc..
However, chopper is when in use, open and close times are few, and current sensor is chronically at useless state, occur wasting
The phenomenon of resource, and the method using special current sensor detection is installed additional, circuit are complicated, also increase the cost of detection,
More cause the generation for wasting.
The content of the invention
Phenomenon detection means and method it is an object of the invention to provide a kind of chopper is restriked, reduce cost, effectively
Phenomenon of restriking to chopper is detected.
Embodiments in accordance with the present invention, there is provided a kind of chopper is restriked phenomenon detection means, described device includes：
Receptor, for receiving the radio frequency electromagnetic signal that switching arc is produced during breaker open operation；
Signal processor, for according to the radio frequency electromagnetic signal, obtaining the envelope of the radio frequency electromagnetic signal
Waveform, according to the envelope waveform, obtains crest quantity, the crest quantity is compared with predetermined number, it is determined that described
Chopper is with the presence or absence of phenomenon of restriking.
Further, described device also includes：Signal conditioner, for improve the radio frequency electromagnetic signal intensity and
Signal to noise ratio, and envelope detection is carried out to the radio frequency electromagnetic signal.
Further, the signal processor also includes：Comparator；If the crest quantity is less than the predetermined number,
Then there is no the phenomenon of restriking；If the crest quantity is more than or equal to the predetermined number, exist described in restrike phenomenon.
Further, the receptor is planar equiangular spiral antenna.
Further, the bandwidth of operation of the receptor is 500MHz~1.5GHz.
Further, the lower-cut-off frequency of the signal conditioner is more than or equal to 500MHz, and upper cut-off frequency is little
In or be equal to 1.5GHz.
Embodiments in accordance with the present invention, there is provided a kind of chopper is restriked phenomenon detection method, methods described includes：
The radio frequency electromagnetic signal that switching arc is produced when receiving breaker open operation；
According to the radio frequency electromagnetic signal, the envelope waveform of the radio frequency electromagnetic signal is obtained；
According to the envelope waveform, crest quantity is obtained, the crest quantity is compared with predetermined number, institute is determined
Chopper is stated with the presence or absence of phenomenon of restriking.
Further, before the envelope waveform for obtaining the radio frequency electromagnetic signal, to the radio frequency
Electromagnetic wave signal carries out noise reduction and envelope detection.
Further, it is described to determine chopper concretely comprising the following steps with the presence or absence of the phenomenon of restriking：
If the crest quantity is less than the predetermined number, there is no the phenomenon of restriking；
If the crest quantity is more than or equal to the predetermined number, exist described in restrike phenomenon.
Further, the predetermined number is 4.
From above technical scheme, the present invention provides a kind of chopper and restrikes phenomenon detection means and method.Work as open circuit
Device can produce switching arc in separating brake, inspire then radio frequency electromagnetic signal and propagate to surrounding.Chopper restrike phenomenon inspection
When surveying device busy, the radio frequency electromagnetic signal that switching arc is produced when receiving breaker open operation by receptor；Signal processing
Device obtains the envelope waveform of the radio frequency electromagnetic signal according to the radio frequency electromagnetic signal, according to the envelope ripple
Shape, obtains crest quantity, and the crest quantity is compared with predetermined number, determines chopper with the presence or absence of phenomenon of restriking.By
It is that radio frequency electromagnetic signal is detected in the present invention, receptor, is passed without electric current is installed without directly contact with chopper
Sensor, save resources, and cause detection process and decision process more convenient and quicker.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing that needs are used is briefly described, it should be apparent that, drawings in the following description are only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can be being obtained according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is that a kind of chopper according to embodiment one is restriked phenomenon structure of the detecting device figure；
Fig. 2 is that a kind of chopper according to embodiment two is restriked phenomenon detection method flow chart；
Fig. 3 is the radio frequency electromagnetic signal waveforms that there is no phenomenon of restriking according to embodiment two；
Fig. 4 is that the presence according to embodiment two is restriked the radio frequency electromagnetic signal waveforms of phenomenon；
Fig. 5 is the radio frequency electromagnetic signal envelope waveform detection figure according to embodiment two.
Illustrate：
Wherein, 1- receptors；2- signal conditioners；3- signal processors.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Whole description, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, embodiments of the invention one provide a kind of chopper restrike phenomenon detection means, including：Receptor
1, for receiving the radio frequency electromagnetic signal that switching arc is produced during breaker open operation；Signal processor 3, for being penetrated according to described
Frequency electromagnetic waves signal, obtains the envelope waveform of the radio frequency electromagnetic signal, according to the envelope waveform, obtains crest number
Amount, the crest quantity is compared with predetermined number, determines the chopper with the presence or absence of phenomenon of restriking.Cut-off in chopper
During, the increase due to acting on the disjunction power on contact gradually reduces contact pressure, and contact position resistance and temperature are continuous
Increase, when temperature reaches contact material fusing point, at contact point, form the metal bridge of fusing metal, contact continues motion, can draw
Disconnected metal bridge and produce electric arc, and then produce radio frequency electromagnetic signal, by the detection to radio frequency electromagnetic signal, judge open circuit
Device is with the presence or absence of phenomenon of restriking.
From above technical scheme, the present invention provides a kind of chopper and restrikes phenomenon detection means.When chopper is dividing
Switching arc can be produced during lock, radio frequency electromagnetic signal is inspired then and is propagated to surrounding.Chopper is restriked phenomenon detection means
Operationally, the radio frequency electromagnetic signal that switching arc is produced when receiving breaker open operation by receptor 1；Signal processor 3
According to the radio frequency electromagnetic signal, the envelope waveform of the radio frequency electromagnetic signal is obtained, according to the envelope waveform, obtained
To crest quantity, the crest quantity is compared with predetermined number, determine the chopper with the presence or absence of phenomenon of restriking.Due to
The present invention is that radio frequency electromagnetic signal is detected, receptor 1 and chopper without directly contact, without installing current sense
Device, save resources, and cause detection process and decision process more convenient and quicker.
Further, described device also includes：Signal conditioner 2, for improving the intensity and letter of radio frequency electromagnetic signal
Make an uproar than and envelope detection is carried out to radio frequency electromagnetic signal.When chopper restrikes the work of phenomenon detection means, receptor 1 connects
The radio frequency electromagnetic signal for receiving is that, with noise signal, can restrike to the chopper detection of phenomenon of noise signal causes to do
Disturb.Therefore, before signal is processed, need radio frequency electromagnetic signal is separated with noise signal, improve radio frequency
The intensity of electromagnetic wave signal.Signal conditioner 2 plays a part of to separate radio frequency electromagnetic signal and noise signal, and is separating
After process, envelope detection is carried out to radio frequency electromagnetic signal also, extract radio frequency electromagnetic signal.Chopper is made to restrike phenomenon
, when being detected, the waveform and data of acquisition is more accurate for detection means.
Further, after the receptor 1 receives radio frequency electromagnetic signal, radio frequency electromagnetic signal is converted into into voltage
Signal, then send voltage signal to signal conditioner 2, facilitates signal conditioner 2 to be processed, and makes chopper restrike phenomenon inspection
Survey device more accurate when being detected.
Further, the signal processor 3 also includes：Comparator；If the crest quantity is less than the predetermined number,
Then there is no the phenomenon of restriking；If the crest quantity is more than or equal to the predetermined number, exist described in restrike phenomenon.
Crest quantity and predetermined number are compared by comparator, with predetermined number as judge chopper with the presence or absence of restrike phenomenon according to
According to if the crest quantity for detecting is less than predetermined number, then be judged to that chopper does not have phenomenon of restriking；If detected
Crest quantity be more than or equal to predetermined number, then be judged to that chopper is present and restrike phenomenon.Due to using comparator, make to sentence
Determine mode more simple, intuitive, facilitate chopper to restrike the work of phenomenon detection means.
Further, the signal processor 3 is also changed to radio frequency electromagnetic signal, converts analog signals into number
Word signal, then digital signal is stored.Make chopper phenomenon detection means of restriking more accurate when being detected.
Further, the receptor 1 is planar equiangular spiral antenna.Helical antenna is one kind of antenna, can be received and dispatched
The polarised electromagnetic signal rotated in space.Equiangular spiral antenna is a kind of normal direction helical antenna.The two-arm of antenna, on a plane
Launch around rotation by specific Curvature varying on the upper or conical surface.As the profile of this antenna is only determined by angle, not comprising linear
Length, thus the characteristic of antenna is not affected by frequency change, therefore have wider frequency band.The maximum spoke of planar equiangular spiral antenna
It is the normal orientation on plane both sides to penetrate direction, and radiates circularly polarised wave.So preferably being connect using planar equiangular spiral antenna
Receive radio frequency electromagnetic signal, it is ensured that what phenomenon of restriking was detected is normally carried out.
Further, the bandwidth of operation of the receptor 1 is 500MHz~1.5GHz.In the transformer station of chopper work
In, corona phenomenon often occurs, the generation of corona is because that rough conductor produces uneven electric field, uneven
Around electric field near the little electrode of radius of curvature when voltage is increased to certain value, as free of air will occur electric discharge, shape
Into corona.Because very weak in the peripheral electric field of corona, do not collide free, corona periphery charged particle is substantially ionization
Son, these ions just define corona discharge current.Reception of the corona phenomenon to radio frequency electromagnetic signal can produce interference, so
1 bandwidth of operation of receptor is set to into 500MHz~1.5GHz, the corona interference of transformer station can be avoided, more accurately radio frequency is obtained
Electromagnetic wave signal.
Further, the lower-cut-off frequency of the signal conditioner 2 is more than or equal to 500MHz, and upper cut-off frequency is little
In or be equal to 1.5GHz.In the transformer station of chopper work, corona phenomenon often occurs, the generation of corona is because injustice
Sliding conductor produces uneven electric field, when voltage is increased to one near the little electrode of radius of curvature around uneven electric field
During definite value, as free of air will occur electric discharge, corona is formed.Because very weak in the peripheral electric field of corona, do not collide
Free, corona periphery charged particle is substantially electron ion, and these ions just define corona discharge current.By signal conditioner
2 upper cut-off frequency is set to less than or equal to 1.5GHz, and lower-cut-off frequency is set to more than or equal to 500MHz, can filter change
The corona interference signal existed in power station, obtains more accurately radio frequency electromagnetic signal.
From above technical scheme, the present invention provides a kind of chopper and restrikes phenomenon detection means.When chopper is dividing
Switching arc can be produced during lock, radio frequency electromagnetic signal is inspired then and is propagated to surrounding.Chopper is restriked phenomenon detection means
Operationally, the radio frequency electromagnetic signal that switching arc is produced when receiving breaker open operation by receptor 1；Signal processor 3
According to the radio frequency electromagnetic signal, the envelope waveform of the radio frequency electromagnetic signal is obtained, according to the waveform, crest is obtained
Quantity, crest quantity is compared with predetermined number, determines chopper with the presence or absence of phenomenon of restriking.As the present invention is to radio frequency
Electromagnetic wave signal detected, receptor 1 and chopper without directly contact, without installing current sensor, save resources, and
And cause detection process and decision process more convenient and quicker.
As shown in Fig. 2 the embodiment of the present invention two provides a kind of chopper restriking phenomenon detection method, methods described includes：
S11, the radio frequency electromagnetic signal that switching arc is produced when receiving breaker open operation；In chopper interrupting process,
Increase due to acting on the disjunction power on contact, gradually reduces contact pressure, and contact position resistance and temperature are continuously increased, when
When temperature reaches contact material fusing point, the metal bridge of fusing metal is formed at contact point, and moving contact continues motion, can break metal
Bridge and produce electric arc, and then produce radio frequency electromagnetic signal；
S12, as shown in figure 5, according to the radio frequency electromagnetic signal, obtaining the envelope ripple of the radio frequency electromagnetic signal
Shape；The detection of broad sense is commonly referred to demodulated, and is the inverse process of modulation, i.e., the process of modulated signal is extracted from modulated wave；Narrow sense
Detection refers to the process of the envelope extraction modulated signal from amplitude-modulated wave.Sometimes this detection is referred to as envelope detection or amplitude inspection
Ripple；
S13, according to the waveform, obtains crest quantity, crest quantity is compared with predetermined number, determines that chopper is
It is no to there is phenomenon of restriking；Envelope waveform after envelope detection also has crest and trough, and crest refers to model of the ripple in a wavelength
In enclosing, the maximum of wave amplitude, minima on the other side are then referred to as trough.
Further, before the envelope waveform for obtaining the radio frequency electromagnetic signal, radio frequency electromagnetic is believed
Number carry out noise reduction and envelope detection.When chopper restrikes the work of phenomenon detection means, the radio frequency electromagnetic that receptor 1 is received
Signal is that, with noise signal, can restrike to the chopper detection of phenomenon of noise signal is interfered.Therefore, signal is being entered
Before row is processed, need radio frequency electromagnetic signal is separated with noise signal, improve the intensity of radio frequency electromagnetic signal.More
Further, before the envelope waveform for obtaining the radio frequency electromagnetic signal, radio frequency electromagnetic signal is wrapped
Network detection, as the aforementioned radio frequency electromagnetic signal to receiving is modulated, radio frequency electromagnetic signal after treatment with
Noise signal is separated, using the method for envelope detection by radio frequency electromagnetic signal extraction out, further examined
Survey, make testing result more accurate.
Further, it is described to determine chopper concretely comprising the following steps with the presence or absence of phenomenon of restriking：
If the crest quantity is less than predetermined number, there is no phenomenon of restriking；If the crest quantity is more than or equal to
, then there is phenomenon of restriking in predetermined number.Crest quantity and predetermined number are compared, with predetermined number to judge chopper are
The no foundation that there is phenomenon of restriking, if the crest quantity for detecting is less than predetermined number, then be judged to that chopper is not present
Restrike phenomenon；If the crest quantity for detecting is more than or equal to predetermined number, then be judged to that chopper has phenomenon of restriking.
Decision procedure more simple, intuitive, facilitates chopper to restrike the work of phenomenon detection means.
Further, the predetermined number is 4.As shown in Figure 3 and Figure 4, when the crest of the envelope waveform for detecting
Quantity is 3, i.e., when less than 4, then judge that chopper does not have phenomenon of restriking；When the crest number of the envelope waveform for detecting
When amount is more than or equal to 4, then judge that chopper has phenomenon of restriking.Predetermined number is existing with the presence or absence of restriking to judge chopper
The foundation of elephant, more intuitive and convenient, are easy to chopper to restrike the work of phenomenon detection means.
Further, when detecting to chopper, need to be by the centrage of planar equiangular spiral antenna alignment chopper
Mesophase, accurately to receive radio frequency electromagnetic signal.
From above technical scheme, the present invention provides a kind of chopper and restrikes phenomenon detection method.When chopper is dividing
Switching arc can be produced during lock, radio frequency electromagnetic signal is inspired then and is propagated to surrounding.Chopper is restriked phenomenon detection means
Operationally, the radio frequency electromagnetic signal that switching arc is produced when receiving breaker open operation by receptor 1；Signal conditioner 2 will
Radio frequency electromagnetic signal is separated with noise signal, then carries out envelope detection, obtains more accurately waveform.3 basis of signal processor
The radio frequency electromagnetic signal, obtains the envelope waveform of the radio frequency electromagnetic signal, according to the waveform, obtains crest number
Amount, crest quantity is compared with predetermined number, determines chopper with the presence or absence of phenomenon of restriking.As the present invention is to radio frequency electrical
Magnetostatic wave signal detected, receptor 1 and chopper without directly contact, without installing current sensor, save resources, and
So that detection process and decision process more convenient and quicker.
Those skilled in the art will readily occur to its of the present invention after considering description and putting into practice invention disclosed herein
Its embodiment.The application is intended to any modification of the present invention, purposes or adaptations, these modifications, purposes or
Person's adaptations follow the general principle of the present invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the precision architecture for being described above and being shown in the drawings is the invention is not limited in, and
And various modifications and changes can be being carried out without departing from the scope.The scope of the present invention is limited only by appended claim.
Claims (10)
1. a kind of chopper is restriked phenomenon detection means, it is characterised in that include：
Receptor, for receiving the radio frequency electromagnetic signal that switching arc is produced during breaker open operation；
Signal processor, for according to the radio frequency electromagnetic signal, obtaining the envelope waveform of the radio frequency electromagnetic signal,
According to the envelope waveform, crest quantity is obtained, the crest quantity is compared with predetermined number, the chopper is determined
With the presence or absence of phenomenon of restriking.
2. a kind of chopper according to claim 1 is restriked phenomenon detection means, it is characterised in that described device is also wrapped
Include：Signal conditioner, for improving the intensity and signal to noise ratio of the radio frequency electromagnetic signal, and believes to the radio frequency electromagnetic
Number carry out envelope detection.
3. a kind of chopper according to claim 1 is restriked phenomenon detection means, it is characterised in that the signal processor
Also include：Comparator；
If the crest quantity is less than the predetermined number, there is no the phenomenon of restriking；
If the crest quantity is more than or equal to predetermined number, exist described in restrike phenomenon.
4. a kind of chopper according to claim 1 is restriked phenomenon detection means, it is characterised in that the receptor is flat
Face equiangular spiral antenna.
5. a kind of chopper according to claim 1 is restriked phenomenon detection means, it is characterised in that the work of the receptor
Make with a width of 500MHz~1.5GHz.
6. a kind of chopper according to claim 2 is restriked phenomenon detection means, it is characterised in that the signal conditioner
Lower-cut-off frequency be more than or equal to 500MHz, upper cut-off frequency be less than or equal to 1.5GHz.
7. a kind of chopper is restriked phenomenon detection method, it is characterised in that methods described includes：
The radio frequency electromagnetic signal that switching arc is produced when receiving breaker open operation；
According to the radio frequency electromagnetic signal, the envelope waveform of the radio frequency electromagnetic signal is obtained；
According to the envelope waveform, crest quantity is obtained, the crest quantity is compared with predetermined number, determined described disconnected
Road device is with the presence or absence of phenomenon of restriking.
8. a kind of chopper according to claim 5 is restriked phenomenon detection method, it is characterised in that obtain described described
Before the envelope waveform of radio frequency electromagnetic signal, noise reduction and envelope detection are carried out to the radio frequency electromagnetic signal.
9. a kind of chopper according to claim 5 is restriked phenomenon detection method, it is characterised in that the determination chopper
With the presence or absence of concretely comprising the following steps for phenomenon of restriking：
If the crest quantity is less than the predetermined number, there is no the phenomenon of restriking；
If the crest quantity is more than or equal to the predetermined number, exist described in restrike phenomenon.
10. a kind of chopper according to claim 5 is restriked phenomenon detection method, it is characterised in that the predetermined number
For 4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611065357.3A CN106680701A (en) | 2016-11-25 | 2016-11-25 | Circuit breaker re-ignition phenomenon detection device and method |
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| CN201611065357.3A CN106680701A (en) | 2016-11-25 | 2016-11-25 | Circuit breaker re-ignition phenomenon detection device and method |
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ID=58867277
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| CN201611065357.3A Pending CN106680701A (en) | 2016-11-25 | 2016-11-25 | Circuit breaker re-ignition phenomenon detection device and method |
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Cited By (5)
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| CN110824347A (en) * | 2019-11-15 | 2020-02-21 | 南京宏泰半导体科技有限公司 | Method for measuring switch starting time of radio frequency switch |
| CN111474185A (en) * | 2020-05-11 | 2020-07-31 | 国家电网有限公司 | Contact ablation degree judgment method based on circuit breaker radiation electromagnetic wave signal detection |
| CN112067951A (en) * | 2020-09-01 | 2020-12-11 | 国网浙江省电力有限公司电力科学研究院 | Online detection method and system for phase selection, disconnection and heavy breakdown of vacuum switch |
| CN113325257A (en) * | 2021-05-27 | 2021-08-31 | 云南电网有限责任公司电力科学研究院 | Method for judging arc process of arc extinguish chamber by using circuit breaker radiation electromagnetic wave signal |
| CN113759244A (en) * | 2021-09-03 | 2021-12-07 | 中国南方电网有限责任公司超高压输电公司广州局 | Circuit breaker monitoring method and device, computer equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113325257A (en) * | 2021-05-27 | 2021-08-31 | 云南电网有限责任公司电力科学研究院 | Method for judging arc process of arc extinguish chamber by using circuit breaker radiation electromagnetic wave signal |
| CN113325257B (en) * | 2021-05-27 | 2023-01-20 | 云南电网有限责任公司电力科学研究院 | Method for judging arc process of arc extinguish chamber by using circuit breaker radiation electromagnetic wave signal |
| CN113759244A (en) * | 2021-09-03 | 2021-12-07 | 中国南方电网有限责任公司超高压输电公司广州局 | Circuit breaker monitoring method and device, computer equipment and storage medium |
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Application publication date: 20170517 |
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