CN113156306A - Multi-dimensional diagnosis method and system for defects of circuit breaker operating mechanism - Google Patents
Multi-dimensional diagnosis method and system for defects of circuit breaker operating mechanism Download PDFInfo
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- CN113156306A CN113156306A CN202110201959.1A CN202110201959A CN113156306A CN 113156306 A CN113156306 A CN 113156306A CN 202110201959 A CN202110201959 A CN 202110201959A CN 113156306 A CN113156306 A CN 113156306A
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- 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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Abstract
The invention discloses a method and a system for multi-dimensional diagnosis of defects of a circuit breaker operating mechanism, and relates to the technical field of electrical equipment diagnosis. The method comprises the following steps: obtaining a current oscillogram according to the coil current, extracting a characteristic value of the current oscillogram, obtaining a coil current characteristic value, and comparing the coil current characteristic value with the characteristic value of a standard oscillogram so as to judge the running state and the defect type of the circuit breaker operating mechanism; monitoring current signals of the switching-on and switching-off coils in real time in an online monitoring mode, storing current waveform data, and judging the variation trend of key performance of the circuit breaker operating mechanism from multiple dimensions; and comprehensively judging the operating state of the circuit breaker according to the operating state and defect type of the circuit breaker operating mechanism and the variation trend of the key performance of the circuit breaker operating mechanism. According to the invention, the operation state and the development trend of the circuit breaker can be comprehensively judged in multiple dimensions through the comparative analysis of the current waveform of the switching-on/off coil and the standard waveform, the analysis of the time dimension and the analysis of the space dimension.
Description
Technical Field
The invention relates to the technical field of electrical equipment diagnosis, in particular to a multi-dimensional diagnosis method and system for defects of a circuit breaker operating mechanism.
Background
The high-voltage circuit breaker can not only open, close and bear normal working current of an operating line, but also bear, close and open specified short-circuit current within specified time, and is the most important control and protection equipment in a power system. The high-voltage circuit breaker is not only independent key power transformation equipment, but also is a core component of a GIS and a switch cabinet, and the safe and stable operation of the high-voltage circuit breaker has very important practical significance. The phenomenon of circuit breaker failure, failure in closing or misoperation caused by electrical or mechanical failure of the circuit breaker operating mechanism is a key component of major defects of circuit breaker failure and emergency, and the safe and stable operation of a power grid is seriously influenced. Therefore, accurate diagnosis of the defects and hidden dangers of the circuit breaker operating mechanism and timely elimination of the defects are problems to be solved urgently by the power grid.
In the prior art, the operation state of the circuit breaker operating mechanism is judged by measuring the action voltage of the opening and closing electromagnet and testing the mechanical characteristics of the circuit breaker, but the test can be carried out only when power failure is needed in the diagnosis process, and the circuit breaker is diagnosed by adopting a power failure shutdown means in the periodic maintenance, so that a large amount of time is consumed.
Disclosure of Invention
The invention aims to provide a method and a system for diagnosing the defects of a circuit breaker operating mechanism in multiple dimensions, which are used for comprehensively judging the running state and the development trend of a circuit breaker in multiple dimensions through comparative analysis of current waveforms of switching-on and switching-off coils and standard waveforms, analysis of time dimensions and analysis of space dimensions.
In order to achieve the above object, the present invention provides a method for diagnosing defects of a circuit breaker operating mechanism in multiple dimensions, comprising: acquiring a current signal flowing through the opening and closing coil to obtain a coil current; obtaining a current oscillogram according to the coil current, and extracting a characteristic value of the current oscillogram to obtain a coil current characteristic value; comparing the coil current characteristic value with a characteristic value of a standard oscillogram to judge the running state and the defect type of the circuit breaker operating mechanism; monitoring current signals of the switching-on and switching-off coils in real time in an online monitoring mode, storing current waveform data, and judging the variation trend of key performance of the circuit breaker operating mechanism from time dimension and space dimension; and comprehensively judging the operating state of the circuit breaker according to the operating state and the defect type of the circuit breaker operating mechanism and the variation trend of the key performance of the circuit breaker operating mechanism, and sending an alarm signal when the circuit breaker is diagnosed as a fault state.
Further, the current signals flowing through the opening and closing coils comprise coil electrifying initial current, iron core action period current, contact and spring action period current, stable period current and falling period current; judging defects of a control power supply and a coil resistor according to the initial current of the coil electrification; judging the defects of the iron core mechanism according to the current in the iron core action period; and judging the defects of the contact and the spring according to the current of the contact and the spring in the action period.
And further, judging the variation trend of the key performance of the circuit breaker operating mechanism according to the time dimension, including carrying out comparative analysis on the historical current oscillogram of the opening and closing coil of the circuit breaker.
And further, judging the variation trend of the key performance of the circuit breaker operating mechanism according to the space dimension, including carrying out comparative analysis on the current oscillograms of the opening and closing coils of different circuit breakers of the same model.
Further, the comparing the coil current characteristic value with the characteristic value of the standard oscillogram to judge the operation state and the defect type of the circuit breaker operating mechanism comprises: and comparing the coil current characteristic value with the characteristic value of the standard oscillogram by a transient waveform comparison method.
The invention also includes a circuit breaker operating mechanism defect multi-dimensional diagnostic system comprising: the coil current acquisition module is used for acquiring a current signal flowing through the opening and closing coil to obtain a coil current; the current characteristic value acquisition module is used for obtaining a current oscillogram according to the coil current and extracting a characteristic value of the current oscillogram to obtain a coil current characteristic value; the current characteristic value analysis module is used for comparing the coil current characteristic value with a characteristic value of a standard oscillogram so as to judge the running state and the defect type of the circuit breaker operating mechanism; the monitoring analysis module is used for monitoring the current signals of the switching-on and switching-off coils in real time in an online monitoring mode, storing current waveform data and judging the variation trend of key performance of the circuit breaker operating mechanism from time dimension and space dimension; and the operating state diagnosis alarm module is used for comprehensively judging the operating state of the circuit breaker according to the operating state and the defect type of the circuit breaker operating mechanism and the variation trend of the key performance of the circuit breaker operating mechanism and sending an alarm signal when the circuit breaker is diagnosed as a fault state.
Furthermore, the monitoring and analyzing module comprises a time predicting module used for judging the variation trend of the key performance of the circuit breaker operating mechanism according to the time dimension, and the time predicting module is used for comparing and analyzing the historical current oscillogram of the opening and closing coil of the circuit breaker.
Furthermore, the monitoring and analyzing module comprises a space prediction module for judging the variation trend of the key performance of the circuit breaker operating mechanism according to the space dimension, and the comparison and analysis are carried out on the current oscillograms of the opening and closing coils of different circuit breakers of the same model.
The invention also provides a computer terminal device comprising one or more processors and a memory. A memory coupled to the processor for storing one or more programs; when executed by the one or more processors, cause the one or more processors to implement a method for multi-dimensional diagnosis of circuit breaker operating mechanism defects as described in any of the embodiments above.
The present invention also provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the method for multi-dimensional diagnosis of defects of a circuit breaker operating mechanism according to any of the above embodiments.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the multi-dimensional diagnosis method and system for the defects of the circuit breaker operating mechanism, power failure is not needed in the diagnosis process, fault diagnosis of the circuit breaker operating mechanism is carried out by monitoring the currents of the opening and closing coils on line, and the defects can be found in time;
(2) according to the method and the system for diagnosing the defects of the circuit breaker operating mechanism in the multi-dimension mode, the opening and closing coil current of the circuit breaker is closely related to the mechanical motion of the circuit breaker mechanism, and the coil current waveform contains various mechanism defect information, so that the mechanism state accuracy is judged through the opening and closing coil current;
(3) according to the multi-dimensional diagnosis method and system for the defects of the circuit breaker operating mechanism, provided by the invention, the mechanism state reflected by the current waveform of the opening and closing coil is fully utilized, the fault position and type are accurately identified, and the targeted formulation of an rectification scheme is facilitated;
(4) according to the method and the system for diagnosing the defects of the operating mechanism of the circuit breaker, provided by the invention, the running state and the development trend of the circuit breaker are comprehensively judged in a multi-dimensional manner through comparative analysis with a standard waveform, analysis of a time dimension and analysis of a space dimension, a corresponding conclusion is given, and the reliability is high;
(5) the method and the system for diagnosing the defects of the circuit breaker operating mechanism in the multi-dimensional mode have the function of early warning, and if the defect type is diagnosed, warning information is sent according to the severity of the defect, so that a worker is informed of processing the defect in time, and the risk of equipment outage is avoided.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for multi-dimensional defect diagnosis of a circuit breaker operating mechanism according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a method for multi-dimensional diagnosis of defects of a circuit breaker operating mechanism according to another embodiment of the present invention;
fig. 3 is a standard waveform diagram of a switching-on/off coil current according to an embodiment of the present invention;
fig. 4 is a comparison graph of the combination of a standard waveform of a switching-on/off coil current and a measured coil current waveform provided by an embodiment of the invention;
fig. 5 is a schematic structural diagram of a fault multi-dimensional diagnosis system for a circuit breaker operating mechanism according to an embodiment of the invention;
fig. 6 is a schematic structural diagram of a circuit breaker operating mechanism defect multi-dimensional diagnosis system according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a computer terminal device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a method for multi-dimensional defect diagnosis of a circuit breaker operating mechanism according to an embodiment of the present invention. In this embodiment, the method for multi-dimensionally diagnosing defects of the circuit breaker operating mechanism includes the following steps:
and step S110, acquiring a current signal flowing through the opening and closing coil to obtain a coil current.
In order to obtain a current signal flowing through the switching-on and switching-off coil and obtain a coil current, a current monitoring device needs to be installed on a lead wire of the switching-on and switching-off coil, a small current transformer can be adopted, and the on-line monitoring of the current of the switching-on and switching-off coil can be realized. When the circuit breaker normally operates, the current flowing through the opening and closing coil is very small and can be ignored; when the circuit breaker is switched on and switched off, the current flowing through the switching-on and switching-off coil presents a double-peak waveform. At the moment, when the system detects that the coil current exceeds the set threshold value, a control signal is sent out, the recording of the coil current waveform is started, and when the coil current is lower than the threshold value, the recording is stopped. Regarding the threshold setting: if the circuit breaker is too small, the circuit breaker can be started frequently, and whether the circuit breaker is operated or not can not be accurately judged; too large results in missing recorded data and failure in accurate fault identification. Here, the threshold is recommended to be set to 50mA, or corrected according to actual conditions.
And step S120, obtaining a current waveform diagram according to the coil current, and extracting a characteristic value of the current waveform diagram to obtain a coil current characteristic value.
And step S130, comparing the coil current characteristic value with the characteristic value of the standard oscillogram to judge the running state and the defect type of the circuit breaker operating mechanism.
And step S140, monitoring the current signal of the opening and closing coil in real time in an online monitoring mode, storing current waveform data, and judging the variation trend of the key performance of the circuit breaker operating mechanism from the time dimension and the space dimension.
And S150, comprehensively judging the operating state of the breaker according to the operating state and defect type of the breaker operating mechanism and the variation trend of the key performance of the breaker operating mechanism, and sending an alarm signal when the breaker is diagnosed as a fault state.
Referring to fig. 2, fig. 2 is a schematic flow chart illustrating a method for multi-dimensional defect diagnosis of a circuit breaker operating mechanism according to another embodiment of the present invention. In this embodiment, the current of the switching-on/off coil is monitored online, a transient waveform comparison method is introduced, and the operating state and the defect type of the circuit breaker operating mechanism are determined by comparing the actually measured current waveform with a standard waveform. The variation trend of the key performance of the operating mechanism can be judged from the time dimension through comparison with the historical waveform; the breaker operating mechanism is analyzed and evaluated from the spatial dimension by comparing and analyzing the current waveform of the opening and closing coils of the devices of the same manufacturer and the same model. And finally, comprehensively judging the operating state of the circuit breaker through comparative analysis with a standard waveform, analysis of a time dimension and analysis of a space dimension. And if the circuit breaker operating mechanism has defects, sending alarm information in time according to the types and severity of the defects.
The standard waveform diagram of the opening and closing coil current is a 'double-peak waveform', the characteristic value of the standard waveform diagram is defined, and a typical waveform is shown in fig. 3. In the figure, O (X0, Y0) is zero, and the starting point of the current start to increase; a (X1, Y1) represents the first peak; b (X2, Y2) represents a trough; c (X3, Y3) and D (X4, Y4) indicate the second peak, and E (X5, Y5) indicates that the coil current has dropped to 0.
The current signals flowing through the opening and closing coils comprise coil electrifying initial current, iron core action period current, contact and spring action period current, stable period current and descending period current; judging defects of a control power supply and a coil resistor according to the initial current of the coil; judging the defects of the iron core mechanism according to the current in the iron core action period; and judging the defects of the contact and the spring according to the current of the contact and the spring in the action period.
In the step S130, the characteristic value of the coil current is compared with the characteristic value of the standard oscillogram to determine the operation state and the defect type of the circuit breaker operating mechanism. And (3) introducing a transient waveform comparison method, comparing the actually measured current waveform with a standard waveform, and mainly comparing the characteristic values to judge the running state and the defect type of the circuit breaker operating mechanism. According to the above definition, the OA section represents the initial phase of coil energization, the AB section represents the core action period, the BC section represents the contact/spring action period, the CD section represents the current stabilization period, and the DE section represents the current reduction period. OA section current waveform can reflect the defects of a control power supply and coil resistance, AB section current waveform can reflect the defects of jamming, deformation, tripping and the like of an iron core mechanism, and BC section current waveform can reflect the defects of contact jamming, spring fatigue, loosening of a connecting piece and the like.
For example, referring to FIG. 4, a comparison analysis is performed between the standard waveform and the measured coil current waveform. Since the characteristic values of A (X1, Y1) have no obvious change, B (X2, Y2) shifts to the right relative to the standard value B (X2, Y2), and other characteristic values shift to the right along with the shift without other obvious changes, the duration of the AB segment is judged to be prolonged; the AB section represents the action period of the iron core and locks the defect on the iron core of the opening and closing coil; because AB section current waveform can reflect defects such as iron core mechanism jamming, deformation and tripping failure, according to the characteristic of AB section duration extension, the defect that this circuit breaker has divide-shut brake coil iron core jamming is tentatively judged.
The standard waveform can be obtained by, but is not limited to: when the circuit breaker leaves a factory or is handed over, the factory test/hand-over test result is stored and serves as the standard waveform of the circuit breaker to be stored; and secondly, testing three phases of the circuit breaker, and if two phases of the circuit breaker are close to each other and accord with typical waveform characteristics, diagnosing the other phase by taking the two phases as standard waveforms.
Through the mode of on-line monitoring, the divide-shut brake coil current of real-time supervision to save current waveform data, judge the trend of change of operating device key performance from time dimension and space dimension. The time dimension is as follows: and comparing and analyzing the current waveforms of the historical opening and closing coils of the same circuit breaker, and analyzing and evaluating the change trend of the circuit breaker operating mechanism. Spatial dimension: the current waveform of the opening and closing coil of the device with the same manufacturer and the same model of a certain circuit breaker is compared and analyzed, and the analysis and evaluation of the change trend of the circuit breaker operating mechanism are carried out. The core methods of the two dimensions are the same as the defect diagnosis and positioning of the breaker operating mechanism, which is not described herein again.
Comprehensively judging the running state of a certain circuit breaker through comparative analysis of the circuit breaker and a standard waveform, analysis of a time dimension and analysis of a space dimension, giving a corresponding conclusion, if no defect is found, storing current waveform data of a switching-on/off coil of each time, and waiting for recording next data; if the defect is found, an alarm signal is sent in time. The method can be set according to the actual situation through modes of background alarm or short message alarm and the like.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a circuit breaker operating mechanism defect multi-dimensional diagnosis system according to an embodiment of the present invention. The same portions of this embodiment as those of the above embodiments will not be described herein again. The circuit breaker operating device defect multidimension degree diagnostic system that this embodiment provided includes:
and the coil current acquisition module 210 is configured to acquire a current signal flowing through the opening and closing coil to obtain a coil current. The current monitoring device is arranged on the lead of the opening and closing coil, a small current transformer can be adopted, and the on-line monitoring of the current of the opening and closing coil can be realized.
The current characteristic value obtaining module 220 is configured to obtain a current waveform diagram according to the coil current, and extract a characteristic value of the current waveform diagram to obtain a coil current characteristic value. By setting corresponding starting threshold values, when the switch is switched on and off, the current of the switch-on and switch-off coil is collected.
And the current characteristic value analysis module 230 is used for comparing the coil current characteristic value with the characteristic value of the standard oscillogram so as to judge the running state and the defect type of the circuit breaker operating mechanism. And transmitting the current waveform data of the switching-on/off coil through the optical fiber. When the circuit breaker is operated, the characteristic values of the opening/closing coil current data are extracted, and include a zero point O (X0, Y0), a first peak value a (X1, Y1), a valley value B (X2, Y2), second peak values C (X3, Y3), D (X4, Y4), and an end point E (X5, Y5).
And the monitoring analysis module 240 is used for monitoring the current signal of the switching-on/off coil in real time in an online monitoring mode, storing current waveform data and judging the variation trend of the key performance of the circuit breaker operating mechanism from the time dimension and the space dimension. And uniformly storing the current waveform data of the whole area opening and closing coil. The whole district refers to a certain power grid company, a provincial power grid, a city bureau or a certain transformer substation, and unified planning is carried out according to actual conditions.
And the operating state diagnosis warning module 250 is used for comprehensively judging the operating state of the circuit breaker according to the operating state and the defect type of the circuit breaker operating mechanism and the variation trend of the key performance of the circuit breaker operating mechanism, and sending out a warning signal when the circuit breaker is diagnosed as a fault state. Comprehensively judging the operating state of the circuit breaker through comparative analysis with a standard waveform, analysis of a time dimension and analysis of a space dimension, giving a corresponding conclusion, if no defect is found, storing current waveform data of the switching-on/off coil of the previous time, and waiting for recording next data; if the defect is found, an alarm signal is sent in time. The method can be set according to the actual situation through modes of background alarm or short message alarm and the like.
The monitoring and analyzing module 240 includes a time predicting module 241, which is used for judging the variation trend of the critical performance of the circuit breaker operating mechanism according to the time dimension, including performing comparative analysis on the historical current oscillogram of the opening and closing coil of the circuit breaker. The monitoring and analyzing module 240 further includes a spatial prediction module 242, which is configured to determine a variation trend of critical performance of the circuit breaker operating mechanism according to spatial dimensions, including performing comparative analysis on current oscillograms of switching-on and switching-off coils of different circuit breakers of the same model.
Referring to fig. 7, an embodiment of the invention provides a computer terminal device, which includes one or more processors and a memory. The memory is coupled to the processor for storing one or more programs which, when executed by the one or more processors, cause the one or more processors to implement the method for multi-dimensional diagnosis of circuit breaker operating mechanism defects as in any of the embodiments described above.
The processor is used for controlling the overall operation of the computer terminal equipment so as to complete all or part of the steps of the multi-dimensional diagnosis method for the defects of the circuit breaker operating mechanism. The memory is used to store various types of data to support the operation at the computer terminal device, which data may include, for example, instructions for any application or method operating on the computer terminal device, as well as application-related data. The Memory may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk, or optical disk.
In an exemplary embodiment, the computer terminal Device may be implemented by one or more Application Specific 1 integrated circuits (AS 1C), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a controller, a microcontroller, a microprocessor or other electronic components, and is configured to perform the above-mentioned method for multi-dimensional diagnosis of the operating mechanism defects of the Circuit breaker, and achieve the technical effects consistent with the above-mentioned method.
In another exemplary embodiment, there is also provided a computer readable storage medium comprising program instructions which, when executed by a processor, implement the steps of the method for multi-dimensional diagnosis of circuit breaker operating mechanism defects in any of the above embodiments. For example, the computer readable storage medium may be the above memory including program instructions executable by a processor of a computer terminal device to perform the above method for multi-dimensional diagnosis of a defect of a circuit breaker operating mechanism, and achieve technical effects consistent with the above method.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A multi-dimensional diagnosis method for defects of an operating mechanism of a circuit breaker is characterized by comprising the following steps:
acquiring a current signal flowing through the opening and closing coil to obtain a coil current;
obtaining a current oscillogram according to the coil current, and extracting a characteristic value of the current oscillogram to obtain a coil current characteristic value;
comparing the coil current characteristic value with a characteristic value of a standard oscillogram to judge the running state and the defect type of the circuit breaker operating mechanism;
monitoring current signals of the switching-on and switching-off coils in real time in an online monitoring mode, storing current waveform data, and judging the variation trend of key performance of the circuit breaker operating mechanism from time dimension and space dimension;
and comprehensively judging the operating state of the circuit breaker according to the operating state and the defect type of the circuit breaker operating mechanism and the variation trend of the key performance of the circuit breaker operating mechanism, and sending an alarm signal when the circuit breaker is diagnosed as a fault state.
2. The method for multi-dimensionally diagnosing defects of an operating mechanism of a circuit breaker according to claim 1, wherein the current signals flowing through the opening and closing coils include a coil energization initial current, an iron core action period current, a contact and spring action period current, a stabilization period current and a descent period current;
judging defects of a control power supply and a coil resistor according to the initial current of the coil electrification;
judging the defects of the iron core mechanism according to the current in the iron core action period;
and judging the defects of the contact and the spring according to the current of the contact and the spring in the action period.
3. The method for multi-dimensionally diagnosing the defects of the circuit breaker operating mechanism according to claim 1, wherein the step of judging the variation trend of the critical performance of the circuit breaker operating mechanism according to the time dimension comprises the step of carrying out comparative analysis on a historical current oscillogram of a switching-on and switching-off coil of the circuit breaker.
4. The method for multi-dimensionally diagnosing the defects of the circuit breaker operating mechanism according to claim 1, wherein the step of judging the variation trend of the key performance of the circuit breaker operating mechanism according to the spatial dimension comprises the step of carrying out comparative analysis on current oscillograms of opening and closing coils of different circuit breakers of the same model.
5. The multi-dimensional diagnosis method for the defects of the circuit breaker operating mechanism according to claim 1, wherein the step of comparing the coil current characteristic value with the characteristic value of a standard oscillogram to judge the operating state and the defect type of the circuit breaker operating mechanism comprises the following steps:
and comparing the coil current characteristic value with the characteristic value of the standard oscillogram by a transient waveform comparison method.
6. A circuit breaker operating mechanism defect multi-dimensional diagnostic system, comprising:
the coil current acquisition module is used for acquiring a current signal flowing through the opening and closing coil to obtain a coil current;
the current characteristic value acquisition module is used for obtaining a current oscillogram according to the coil current and extracting a characteristic value of the current oscillogram to obtain a coil current characteristic value;
the current characteristic value analysis module is used for comparing the coil current characteristic value with a characteristic value of a standard oscillogram so as to judge the running state and the defect type of the circuit breaker operating mechanism;
the monitoring analysis module is used for monitoring the current signals of the switching-on and switching-off coils in real time in an online monitoring mode, storing current waveform data and judging the variation trend of key performance of the circuit breaker operating mechanism from time dimension and space dimension;
and the operating state diagnosis alarm module is used for comprehensively judging the operating state of the circuit breaker according to the operating state and the defect type of the circuit breaker operating mechanism and the variation trend of the key performance of the circuit breaker operating mechanism and sending an alarm signal when the circuit breaker is diagnosed as a fault state.
7. The system of claim 6, wherein the monitoring and analyzing module comprises a time predicting module for determining a trend of a change in critical performance of the circuit breaker operating mechanism according to the time dimension, and the system comprises a comparison analysis of a historical current oscillogram of a switching-on/off coil of the circuit breaker.
8. The multi-dimensional defect diagnosis system for the circuit breaker operating mechanism according to claim 6, wherein the monitoring and analyzing module comprises a spatial prediction module for judging the variation trend of the key performance of the circuit breaker operating mechanism according to the spatial dimension, including the comparative analysis of the current oscillograms of the switching-on and switching-off coils of different circuit breakers of the same model.
9. A computer terminal device, comprising:
one or more processors;
a memory coupled to the processor for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the method of multi-dimensional diagnosis of circuit breaker operating mechanism defects according to any of claims 1 to 5.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a method for multidimensional diagnosis of defects in a circuit breaker operating mechanism according to any one of claims 1 to 5.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114062911A (en) * | 2021-10-22 | 2022-02-18 | 深圳供电局有限公司 | Breaker state monitoring method and device, computer equipment and storage medium |
| CN114295969A (en) * | 2021-11-30 | 2022-04-08 | 国网北京市电力公司 | Online monitoring method, equipment and system for high-voltage circuit breaker and storage medium |
| CN114646351A (en) * | 2022-03-28 | 2022-06-21 | 广东电网有限责任公司 | Multi-dimensional comprehensive breaker fault feature analysis method and device |
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