CN115047329A - Breaker opening performance detection method, device and equipment - Google Patents

Breaker opening performance detection method, device and equipment Download PDF

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Publication number
CN115047329A
CN115047329A CN202210487944.0A CN202210487944A CN115047329A CN 115047329 A CN115047329 A CN 115047329A CN 202210487944 A CN202210487944 A CN 202210487944A CN 115047329 A CN115047329 A CN 115047329A
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China
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radiation field
transient radiation
circuit breaker
field signal
phase
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刘宏
俞华
李国栋
牛曙
李帅
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State Grid Electric Power Research Institute Of Sepc
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State Grid Electric Power Research Institute Of Sepc
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Priority to CN202210487944.0A priority Critical patent/CN115047329A/en
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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
    • G01R31/3272—Apparatus, systems or circuits therefor

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  • General Physics & Mathematics (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Keying Circuit Devices (AREA)

Abstract

The application discloses a method, a device and equipment for detecting the on-off performance of a circuit breaker, relates to the technical field of electrical equipment, and can solve the problem that the detection accuracy of the on-off performance of the circuit breaker is low. The method comprises the following steps: detecting a mixed transient radiation field signal generated by the breaker in the opening process by using an array sensor; separating the mixed transient radiation field signal into single-phase transient radiation field signals, and determining the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals; and determining the detection result of the opening performance of the circuit breaker according to the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals.

Description

Breaker opening performance detection method, device and equipment
Technical Field
The application relates to the technical field of electrical equipment, in particular to a method, a device and equipment for detecting the opening and closing performance of a circuit breaker.
Background
The circuit breaker has dual functions of control and protection in a power system, the core function of the circuit breaker is the breaking performance, direct economic loss caused by the breaking problem of the circuit breaker reaches billions of yuan in nearly five years, and therefore timely detection of the breaking performance of the circuit breaker plays an important role in national economic development and normal life of people.
At present, the on-off performance of the circuit breaker is subjected to simulation detection under the power-off condition, but because the actual working condition of the circuit breaker operation needs larger current and voltage, the simulation detection cannot reach the large current and voltage, the obtained simulation data cannot reflect the actual condition, and therefore the detection accuracy of the on-off performance of the circuit breaker is lower.
Disclosure of Invention
In view of this, the application provides a method, a device and equipment for detecting the opening performance of a circuit breaker, relates to the technical field of electrical equipment, and can solve the problem that the detection accuracy of the opening performance of the circuit breaker is low.
According to an aspect of the present application, there is provided a method for detecting the opening performance of a circuit breaker, the method including:
detecting a mixed transient radiation field signal generated by the breaker in the opening process by using an array sensor;
separating the mixed transient radiation field signal into single-phase transient radiation field signals, determining the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals;
and determining the detection result of the on-off performance of the circuit breaker according to the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals.
According to another aspect of the present application, there is provided a circuit breaker opening performance detecting apparatus, the apparatus including:
the detection module is used for detecting a mixed transient radiation field signal generated by the breaker in the switching-off process by using the array sensor;
a separation module for separating the mixed transient radiation field signal into single-phase transient radiation field signals, determining the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals;
the determining module is used for determining the detection result of the opening performance of the circuit breaker according to the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals.
According to yet another aspect of the present application, there is provided a non-transitory readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described circuit breaker opening performance detection method.
According to yet another aspect of the present application, there is provided a computer device comprising a non-volatile readable storage medium, a processor, and a computer program stored on the non-volatile readable storage medium and executable on the processor, the processor implementing the above-mentioned circuit breaker opening performance detection method when executing the program.
By means of the technical scheme, the application discloses a method, a device and equipment for detecting the opening and closing performance of a circuit breaker, and the method, the device and the equipment firstly utilize an array sensor to detect mixed transient radiation field signals generated by the circuit breaker in the opening process; further, separating the mixed transient radiation field signal into single-phase transient radiation field signals, and determining the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals; and finally, determining the detection result of the on-off performance of the circuit breaker according to the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals. Technical scheme in this application can realize through non-contact's array sensor that electrified detection mixes transient state radiation field signal, and the simulation that goes on under the power failure detects big voltage and heavy current when can't reach electrified, consequently, this application accords with operating condition more to the detection of circuit breaker breaking performance, and circuit breaker breaking performance testing result is more accurate.
The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.
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The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application to the disclosed embodiment. In the drawings:
fig. 1 illustrates a schematic flow chart of a method for detecting the opening performance of a circuit breaker according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart illustrating another method for detecting the opening performance of a circuit breaker according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram illustrating an example scenario for detecting the opening performance of a circuit breaker according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a device for detecting the opening performance of a circuit breaker according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of another device for detecting the opening performance of a circuit breaker according to an embodiment of the present disclosure.
Detailed Description
The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
To solve the current problem, an embodiment of the present application provides a method for detecting the opening performance of a circuit breaker, as shown in fig. 1, the method includes:
101. and detecting a mixed transient radiation field signal generated by the breaker in the opening process by using the array sensor.
For the present embodiment, as a preferred embodiment, the circuit breaker may include a sulfur hexafluoride circuit breaker, which is not limited herein, during the opening process of the circuit breaker, an arc may occur, the arc may excite the mixed transient radiation field in the space, and may be detected by the array sensor, a string of the array sensors may be formed by vertically overlapping 4 uhf sensors, and compared with a single sensor, the array sensor may completely and effectively detect the mixed transient radiation field signal generated by the circuit breaker during the opening process. The hybrid transient radiation field signal generated in the on-off process of the breaker can be detected in a non-contact mode by using the sensor, so that the detection can be carried out under the electrified condition of the breaker, the detection result of the on-off performance of the breaker accords with the actual condition, and the detection accuracy is high.
Because the circuit breaker is three-phase, under the condition that the circuit breaker does not reignite (that is, only one arc is generated in each phase), the detected mixed transient radiation field signal is the mixture of three single-phase transient radiation field signals, and under the condition that the circuit breaker reignites, because at least one phase circuit breaker generates another arc, the detected mixed transient radiation field signal is the mixture of more than three single-phase transient radiation field signals.
102. Separating the mixed transient radiation field signal into single-phase transient radiation field signals, determining the number of single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals.
For the present embodiment, as a preferred implementation manner, since the detected mixed transient radiation field signal is a mixture of at least three single-phase transient radiation field signals, in order to analyze the circuit breaker opening performance, the mixed transient radiation field signal needs to be separated into the single-phase transient radiation field signals, and specifically, the separation may be performed by using an independent component analysis algorithm, which is not limited herein.
When determining the number of single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals, the analysis software may place the separated at least three single-phase transient radiation field signals in a coordinate system of time-transient radiation field signal amplitudes, directly read out the number of single-phase transient radiation field signals and the duration of the single-phase transient radiation field signals, or directly read out the number of single-phase transient radiation field signals, or directly read out the duration of the single-phase transient radiation field signals, wherein the duration of the single-phase transient radiation field signals starts from the generation of the single-phase transient radiation field signals to the end of the single-phase transient radiation field signals.
103. And determining the detection result of the opening performance of the circuit breaker according to the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals.
As a preferred embodiment, the present embodiment may include: and determining the detection result of the on-off performance of the circuit breaker according to the number of the single-phase transient radiation field signals and the duration of the single-phase transient radiation field signals. Or determining the detection result of the opening performance of the circuit breaker according to the number of the single-phase transient radiation field signals. Or determining the detection result of the opening performance of the circuit breaker according to the duration time of the single-phase transient radiation field signal.
The method includes the steps that the detection result of the circuit breaker opening performance is determined according to the number of single-phase transient radiation field signals and the duration time of the single-phase transient radiation field signals, and specifically, when the detection result of the circuit breaker opening performance determined according to the number of the single-phase transient radiation field signals and the detection result of the circuit breaker opening performance determined according to the duration time of the single-phase transient radiation field signals are not in fault, the detection result of the circuit breaker opening performance is considered to be not in fault.
The method for analyzing the on-off performance of the circuit breaker by utilizing the number of single-phase transient radiation field signals comprises the following steps: if the circuit breaker is good in opening performance, each phase circuit breaker only radiates single-phase transient radiation field signals of a single cluster outwards in the opening process, and if the opening performance of the circuit breaker is degraded (the degradation is reflected in incomplete arc extinction, namely, arc reignition, because energy generated by the arc reignition is large, the circuit breaker is easily damaged or overvoltage is generated in a power system, and large-area power failure of a power grid is caused), each phase circuit breaker can cause reignition due to incomplete arc extinction in the opening process, so that each phase can radiate two clusters and more than two clusters of single-phase transient radiation field signals outwards, wherein a group of single-phase transient radiation field signals continuously appearing in a time domain is a cluster.
The duration of the single-phase transient radiation field signal represents the time from generation to end of the single-phase transient radiation field signal, and the detection result of the opening performance of the circuit breaker is determined by using the duration of the single-phase transient radiation field signal: if the duration of at least one section of single-phase transient radiation field signal exceeds the preset arc extinguishing time, the circuit breaker is also indicated to have at least one phase which is not completely extinguished, and the circuit breaker with good breaking performance can complete the arc extinguishing within the preset arc extinguishing time.
The number of the single-phase transient radiation field signals and the duration of the single-phase transient radiation field signals are easy to extract and are directly related to the on-off performance of the circuit breaker, the detection result of the on-off performance of the circuit breaker is determined according to the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals, and the detection efficiency is improved.
The application discloses a method, a device and equipment for detecting the breaking performance of a circuit breaker, and the method, the device and the equipment firstly utilize an array sensor to detect a mixed transient radiation field signal generated by the circuit breaker in the switching-off process; further, separating the mixed transient radiation field signal into single-phase transient radiation field signals, and determining the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals; and finally, determining the detection result of the on-off performance of the circuit breaker according to the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals. Technical scheme in this application can realize electrified detection through non-contact's array sensor and mix transient state radiation field signal, and the simulation that goes on under the power failure detects big voltage and heavy current when can't reach electrified, consequently, this application accords with operating condition more to the detection of circuit breaker breaking performance, and circuit breaker breaking performance testing result is more accurate.
Further, as a refinement and an extension of the specific implementation of the above embodiment, in order to fully illustrate the specific implementation process in this embodiment, another method for detecting the opening performance of the circuit breaker is provided, as shown in fig. 2, the method includes:
201. and determining the position of the circuit breaker for generating a transient radiation field signal, and arranging array sensors according to the position, wherein the array sensors are formed by vertically superposing a preset number of ultrahigh frequency sensors.
For the embodiment, as a preferred implementation manner, in order to detect a transient radiation field signal, sensors are arranged differentially according to positions of transient radiation fields generated by different circuit breakers, taking a sulfur hexafluoride circuit breaker as an example, 1 group of array sensors are arranged 2-3m right in front of three phases and right opposite to a middle phase circuit breaker, 1 group of array sensors are arranged about 1m in front of a gap of a switch cabinet for a switch cabinet type sulfur hexafluoride circuit breaker, 1 uhf sensor is arranged at each uhf detection port of a phase splitting device for a GIS type three-phase split sulfur hexafluoride circuit breaker, and 1 uhf sensor is arranged in a space 1m away from the middle phase.
202. And detecting a mixed transient radiation field signal generated by the breaker in the opening process by using the array sensor.
For the present embodiment, as a preferred implementation, a string of array sensors may be composed of vertically superposed 4 uhf sensors, and compared with a single sensor, the array sensor can completely and effectively detect the mixed transient radiation field signal generated by the breaker during the opening process.
The hybrid transient radiation field signal generated in the on-off process of the breaker can be detected in a non-contact mode by using the sensor, so that the detection can be carried out under the electrified condition of the breaker, the detection result of the on-off performance of the breaker accords with the actual condition, and the detection accuracy is high.
203. The mixed transient radiation field signal comprises: and detecting the background transient radiation field signal, and removing the background transient radiation field signal from the mixed transient radiation field signal to obtain the mixed transient radiation field signal from which the background transient radiation field signal is removed.
For this embodiment, the detected mixed transient radiation field signal further includes a background transient radiation field signal, and the background transient radiation field signal is to be removed from the mixed transient radiation field signal to prevent the strong electromagnetic interference in the field.
Preferably, the detecting of the background transient radiation field signal comprises: and detecting a background transient radiation field signal by using a time-frequency domain combined double-window anti-interference method. The time-frequency domain combined double-window anti-interference method comprises the following two aspects: on one hand, the method is frequency domain windowing, the acquisition frequency is set to be 500MHz-2GHz, external strong electromagnetic interference of 50MHz-500MHz on site is avoided, and on the other hand, the time domain windowing is carried out by taking the trigger time acquired by the opening and closing coil current tester as a reference and combining the inherent opening time of the circuit breaker given by a manufacturer. Meanwhile, the coil current waveform in the whole circuit breaker action process monitored by the opening and closing coil current tester is combined, if the coil current waveform repeatedly vibrates violently, the transient radiation field waveform of the circuit breaker at the same moment is eliminated, and the influence of electromagnetic signals generated by the action current of the auxiliary node of the circuit breaker mechanism is avoided.
204. And separating the mixed transient radiation field signal into a single-phase transient radiation field signal by using an independent component analysis algorithm.
For this embodiment, as a preferred implementation, an Independent Component Analysis (ICA) is a signal processing method, which is aimed at separating mutually Independent source signals from an observed mixed signal, specifically, averaging the mixed transient radiation field signal, whitening the averaged mixed transient radiation field signal, and performing linear decomposition on the whitened mixed transient radiation field signal by using an Independent Component Analysis algorithm to decompose the whitened mixed transient radiation field signal into statistically Independent components, that is, recovering a basic source signal from the mixed transient radiation field signal.
The model of the independent component analysis algorithm is: x is As
The model of the independent component analysis algorithm represents that the mixed transient radiation field signal x is formed by mixing a source signal, namely a single-phase transient radiation field signal s, through a mixing matrix a, when the single-phase transient radiation field signal s is separated, the mixing matrix a needs to be estimated first, and then the single-phase transient radiation field signal s can be calculated through the following formula:
s＝Wx
where W is the inverse of A.
Specifically, when the hybrid matrix a is estimated, the objective function may be determined by using non-gaussian maximization, mutual information minimization, maximum likelihood estimation, KL divergence, and the like, and the hybrid matrix a is obtained by further performing optimization processing by using an adaptive optimization algorithm.
205. The number of single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals is determined.
For the present embodiment, as a preferred embodiment, when determining the number of single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals, the analysis software may place the separated at least three single-phase transient radiation field signals in a coordinate system of the time-transient radiation field signal amplitude, and directly read out the number of single-phase transient radiation field signals and the duration of the single-phase transient radiation field signals, or directly read out the number of single-phase transient radiation field signals, or directly read out the duration of the single-phase transient radiation field signals, wherein the duration of the single-phase transient radiation field signals starts from the generation of the single-phase transient radiation field signals to the end of the single-phase transient radiation field signals.
206. And determining the detection result of the opening performance of the circuit breaker according to the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals.
As a preferred embodiment, the present embodiment may include: and judging whether the number of the single-phase transient radiation field signals is greater than a first preset value or not, if so, determining that the fault detection result of the circuit breaker is a fault, determining the longest duration and the shortest duration of the single-phase transient radiation field signals, and determining the fault detection result of the circuit breaker according to the longest duration and the shortest duration. Or judging whether the number of the single-phase transient radiation field signals is larger than a first preset value or not, and if so, determining that the fault detection result of the circuit breaker is that a fault exists. Or determining the longest duration and the shortest duration of the single-phase transient radiation field signal, and determining the fault detection result of the circuit breaker according to the longest duration and the shortest duration.
And if so, determining that the fault detection result of the circuit breaker is a fault, determining the longest duration and the shortest duration of the single-phase transient radiation field signals, and determining the fault detection result of the circuit breaker according to the longest duration and the shortest duration. Correspondingly: and considering that the breaker opening performance detection result is not in fault when the breaker opening performance detection result determined according to the number of the single-phase transient radiation field signals and the breaker opening performance detection result determined according to the duration of the single-phase transient radiation field signals are not in fault.
Preferably, after the background transient radiation field signals are removed, if the circuit breaker is not reignited, each corresponding single-cluster single-phase transient radiation field signal is detected, and the circuit breaker includes three phases, so that the number of the single-phase transient radiation field signals is three clusters, if the circuit breaker is reignited, it indicates that at least one phase circuit breaker corresponds to two clusters and more than two clusters of single-phase transient radiation field signals, and therefore, it is determined whether the number of the single-phase transient radiation field signals is greater than a first preset value, where the first preset value is 3 (if the background transient radiation field signals are not removed, the background transient radiation field signals are also one cluster, the first preset value is 4), and if the number of the single-phase transient radiation field signals is greater than the first preset value, it indicates that the circuit breaker is reignited, and the corresponding circuit breaker fault detection result indicates that a fault exists.
Preferably, determining the breaker fault detection result according to the longest duration and the shortest duration includes: calculating the ratio of the longest duration time to the shortest duration time, judging whether the ratio is greater than a second preset value, and if so, determining that the fault detection result of the circuit breaker is that a fault exists; and/or judging whether the longest duration time is greater than the preset arc extinguishing time, and if so, determining that the fault detection result of the circuit breaker is that a fault exists.
Preferably, the ratio of the longest duration to the shortest duration is calculated, whether the ratio is greater than a second preset value or not is judged, and if yes, the fault detection result of the circuit breaker is determined to be that a fault exists. The number of the single-phase transient radiation field signals at least comprises three clusters, each cluster of single-phase transient radiation field signals corresponds to a duration, the longest duration and the shortest duration in the durations of all the single-phase transient radiation field signals are determined, the ratio of the longest duration divided by the shortest duration is calculated, whether the ratio is greater than a second preset value or not is judged, and preferably, the second preset value is determined to be 3 according to statistical data for detecting thousands of circuit breakers.
Preferably, whether the longest duration is longer than a preset arc extinguishing time or not is judged, and if yes, the fault detection result of the circuit breaker is determined to be that a fault exists. The preset arc extinguishing time is standard time for judging whether the circuit breaker finishes arc extinction, if the duration time of the single-phase transient radiation field signal is longer than the preset arc extinguishing time, it is indicated that the circuit breaker at least has one phase which is not completely extinguished, and the circuit breaker with good breaking performance can finish arc extinction within the preset arc extinguishing time. The number of the single-phase transient radiation field signals at least comprises three clusters, each cluster of the single-phase transient radiation field signals corresponds to the duration, and the fact that the detection result of the on-off performance of the circuit breaker is that a fault exists can be represented as long as the duration of one cluster of the single-phase transient radiation field signals in the durations of all the single-phase transient radiation field signals is larger than the preset arc extinguishing time, so that the detection efficiency is improved in a large amount of data as long as the longest duration in the durations of all the single-phase transient radiation field signals is judged to be larger than the preset arc extinguishing time.
The number of the single-phase transient radiation field signals and the duration of the single-phase transient radiation field signals are easy to extract and are directly related to the on-off performance of the circuit breaker, the detection result of the on-off performance of the circuit breaker is determined according to the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals, and the detection efficiency is improved.
The application discloses a method, a device and equipment for detecting the breaking performance of a circuit breaker, and the method, the device and the equipment firstly utilize an array sensor to detect a mixed transient radiation field signal generated by the circuit breaker in the switching-off process; further, separating the mixed transient radiation field signal into single-phase transient radiation field signals, and determining the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals; and finally, determining the detection result of the on-off performance of the circuit breaker according to the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals. Technical scheme in this application can realize electrified detection through non-contact's array sensor and mix transient state radiation field signal, and the simulation that goes on under the power failure detects big voltage and heavy current when can't reach electrified, consequently, this application accords with operating condition more to the detection of circuit breaker breaking performance, and circuit breaker breaking performance testing result is more accurate.
As shown in fig. 3, a schematic diagram of an example of a scene for detecting the breaking performance of a circuit breaker is shown, and the scene includes a circuit breaker 1, a fixed contact pull rod 2, a fixed contact 3, a movable contact pull rod 4, a movable contact 5, an arc 6, a transient radiation field 7, an array sensor 8 composed of 4 uhf sensors, a data line 9, and a computer 10 with analysis software. A fixed contact supporting rod 2 is arranged on the upper portion of the circuit breaker 1, the supporting rod 2 is connected with a fixed contact 3, a moving contact pull rod 4 is arranged on the lower portion of the circuit breaker, and the pull rod 4 is connected with a moving contact 5. When the breaker is opened, the pull rod 4 pushes the moving contact 5 to be separated from the static contact 4, and the opening of the breaker is completed. When the brake is opened, an electric arc 6 appears, and the electric arc 6 excites a mixed transient radiation field 7 in space.
Further, as a specific implementation of the method shown in fig. 1 and fig. 2, an embodiment of the present application provides a device for detecting the opening performance of a circuit breaker, as shown in fig. 4, the device includes: a detection module 41, a separation module 42, a determination module 43;
the detection module 41 can be used for detecting a mixed transient radiation field signal generated by the breaker in the opening process by using the array sensor;
a separation module 42 operable to separate the mixed transient radiation field signal into single-phase transient radiation field signals, determine the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals;
a determining module 43, configured to determine a breaker opening performance detection result according to the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals.
In a specific application scenario, as shown in fig. 5, the device for detecting the opening performance of a circuit breaker further includes: the layout module 44 is specifically configured to determine a position of the circuit breaker generating the transient radiation field signal, and arrange the array sensors according to the position, where the array sensors are formed by vertically stacking a preset number of ultrahigh frequency sensors.
In a specific application scenario, in order to separate the mixed transient radiation field signal into a single-phase transient radiation field signal, as shown in fig. 5, the separation module 42 is specifically configured to separate the mixed transient radiation field signal into the single-phase transient radiation field signal by using an independent component analysis algorithm.
In a specific application scenario, in order to determine the detection result of the circuit breaker opening performance according to the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals, as shown in fig. 5, the determining module 43 specifically includes: a first determination unit 431 and a second determination unit 432;
the first determining unit 431 is configured to determine whether the number of the single-phase transient radiation field signals is greater than a first preset value, and if so, determine that a fault detection result of the circuit breaker is that a fault exists; and/or the presence of a gas in the gas,
the second determining unit 432 may be configured to determine the longest duration and the shortest duration of the single-phase transient radiation field signal, and determine the breaker fault detection result according to the longest duration and the shortest duration.
Correspondingly, in order to determine the breaker fault detection result according to the longest duration and the shortest duration, the second determining unit 432 is specifically configured to calculate a ratio of the longest duration to the shortest duration, determine whether the ratio is greater than a second preset value, and if so, determine that the breaker fault detection result is that a fault exists; and/or judging whether the longest duration time is greater than a preset arc extinguishing time, and if so, determining that the fault detection result of the circuit breaker is a fault.
In a specific application scenario, a circuit breaker opening performance detection apparatus, a hybrid transient radiation field signal includes: background transient radiation field signal, as shown in fig. 5, the apparatus further comprises: the eliminating module 45 specifically includes: a detection unit 451, a rejection unit 452;
a detection unit 451 operable to detect a background transient radiation field signal;
the removing unit 452 may be configured to remove the background transient radiation field signal from the mixed transient radiation field signal, so as to obtain the mixed transient radiation field signal from which the background transient radiation field signal is removed.
Accordingly, in order to detect the background transient radiation field signal, the detection unit 451 may be specifically configured to detect the background transient radiation field signal by using a time-frequency domain joint dual-window anti-interference method.
It should be noted that other corresponding descriptions of the functional units related to the device for detecting the opening performance of the circuit breaker provided in this embodiment may refer to the corresponding descriptions in fig. 1 to fig. 2, and are not described herein again.
Based on the method shown in fig. 1 to fig. 2, correspondingly, the present embodiment further provides a storage medium, where the storage medium may be volatile or nonvolatile, and has computer readable instructions stored thereon, and the readable instructions are executed by a processor to implement the method for detecting the opening performance of the circuit breaker shown in fig. 1 to fig. 2.
Based on such understanding, the technical solution of the present application may be embodied in the form of a software product, which may be stored in a storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, or the like), and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device, or the like) to execute the method of the embodiments of the present application.
Based on the method shown in fig. 1 to fig. 2 and the virtual device embodiments shown in fig. 4 and fig. 5, in order to achieve the above object, the present embodiment further provides a computer device, where the computer device includes a storage medium and a processor; a storage medium for storing a computer program; a processor for executing a computer program to implement the method for detecting the opening performance of the circuit breaker as shown in fig. 1 to 2.
Optionally, the computer device may further include a user interface, a network interface, a camera, Radio Frequency (RF) circuitry, a sensor, audio circuitry, a WI-FI module, and so forth. The user interface may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), etc., and the optional user interface may also include a USB interface, a card reader interface, etc. The network interface may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), etc.
It will be understood by those skilled in the art that the present embodiment provides a computer device structure that is not limited to the physical device, and may include more or less components, or some components in combination, or a different arrangement of components.
The storage medium may further include an operating system and a network communication module. The operating system is a program that manages the hardware and software resources of the computer device described above, supporting the operation of information handling programs and other software and/or programs. The network communication module is used for realizing communication among components in the storage medium and communication with other hardware and software in the information processing entity device.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented by software plus a necessary general hardware platform, and can also be implemented by hardware.
By applying the technical scheme of the application, compared with the prior art, the application discloses a method, a device and equipment for detecting the opening and closing performance of a circuit breaker, and the application firstly detects a mixed transient radiation field signal generated by the circuit breaker in the opening process by using an array sensor; further, separating the mixed transient radiation field signal into single-phase transient radiation field signals, and determining the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals; and finally, determining the detection result of the on-off performance of the circuit breaker according to the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals. Technical scheme in this application can realize through non-contact's array sensor that electrified detection mixes transient state radiation field signal, and the simulation that goes on under the power failure detects big voltage and heavy current when can't reach electrified, consequently, this application accords with operating condition more to the detection of circuit breaker breaking performance, and circuit breaker breaking performance testing result is more accurate.
Those skilled in the art will appreciate that the figures are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the figures are not necessarily required to practice the present application. Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The above application serial number is merely for description and does not represent the superiority and inferiority of the implementation scenario. The above disclosure is only a few specific implementation scenarios of the present application, but the present application is not limited thereto, and any variations that can be considered by those skilled in the art are intended to fall within the scope of the present application.

Claims (10)

1. A method for detecting the opening performance of a circuit breaker is characterized by comprising the following steps:
detecting a mixed transient radiation field signal generated by the breaker in the opening process by using an array sensor;
separating the mixed transient radiation field signal into single-phase transient radiation field signals, determining the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals;
and determining the detection result of the on-off performance of the circuit breaker according to the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals.
2. The method of claim 1, further comprising, prior to said detecting the hybrid transient radiated field signal generated by the circuit breaker during the opening process with the array sensor:
determining the position of a circuit breaker generating a transient radiation field signal, and arranging an array sensor according to the position, wherein the array sensor is formed by vertically superposing a preset number of ultrahigh frequency sensors.
3. The method of claim 1, wherein the separating the mixed transient radiation field signal into a single-phase transient radiation field signal comprises:
separating the mixed transient radiation field signal into a single-phase transient radiation field signal using an independent component analysis algorithm.
4. The method of claim 1, wherein determining breaker opening performance detection results from the number of single-phase transient radiated field signals and/or the duration of the single-phase transient radiated field signals comprises:
judging whether the number of the single-phase transient radiation field signals is larger than a first preset value or not, and if so, determining that the fault detection result of the circuit breaker is that a fault exists; and/or the presence of a gas in the gas,
determining the longest duration and the shortest duration of the single-phase transient radiation field signal, and determining the fault detection result of the circuit breaker according to the longest duration and the shortest duration.
5. The method of claim 4, wherein determining the breaker failure detection result according to the longest duration and the shortest duration comprises:
calculating the ratio of the longest duration to the shortest duration, judging whether the ratio is greater than a second preset value, and if so, determining that the fault detection result of the circuit breaker is that a fault exists; and/or the presence of a gas in the gas,
and judging whether the longest duration time is greater than a preset arc extinguishing time, and if so, determining that the fault detection result of the circuit breaker is that a fault exists.
6. The method of claim 1, wherein the mixed transient radiation field signal comprises: a background transient radiation field signal;
before separating the mixed transient radiation field signal into single-phase transient radiation field signals, further comprising:
and detecting the background transient radiation field signal, and removing the background transient radiation field signal from the mixed transient radiation field signal to obtain the mixed transient radiation field signal from which the background transient radiation field signal is removed.
7. The method of claim 1, wherein the detecting the background transient radiation field signal comprises:
and detecting the background transient radiation field signal by using a time-frequency domain combined double-window anti-interference method.
8. A circuit breaker breaking performance detection device is characterized by comprising:
the detection module is used for detecting a mixed transient radiation field signal generated by the breaker in the opening process by using the array sensor;
a separation module for separating the mixed transient radiation field signal into single-phase transient radiation field signals, determining the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals;
the determining module is used for determining the detection result of the opening performance of the circuit breaker according to the number of the single-phase transient radiation field signals and/or the duration of the single-phase transient radiation field signals.
9. A storage medium having stored thereon a computer program, characterized in that said program, when executed by a processor, implements the circuit breaker opening performance detection method of any one of claims 1 to 7.
10. A computer device comprising a storage medium, a processor and a computer program stored on the storage medium and executable on the processor, wherein the processor implements the method of detecting the opening performance of the circuit breaker according to any one of claims 1 to 7 when executing the program.
CN202210487944.0A 2022-05-06 2022-05-06 Breaker opening performance detection method, device and equipment Pending CN115047329A (en)

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CN202210487944.0A CN115047329A (en) 2022-05-06 2022-05-06 Breaker opening performance detection method, device and equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210487944.0A CN115047329A (en) 2022-05-06 2022-05-06 Breaker opening performance detection method, device and equipment

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