CN110673028A - Fault diagnosis device and method for 10kV vacuum circuit breaker - Google Patents
Fault diagnosis device and method for 10kV vacuum circuit breaker Download PDFInfo
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- CN110673028A CN110673028A CN201911083083.4A CN201911083083A CN110673028A CN 110673028 A CN110673028 A CN 110673028A CN 201911083083 A CN201911083083 A CN 201911083083A CN 110673028 A CN110673028 A CN 110673028A
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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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Abstract
The invention provides a fault diagnosis device and method for a 10kV vacuum circuit breaker, wherein the device comprises an insulation resistance detection module, a power frequency withstand voltage detection module, a loop resistance detection module, a circuit breaker dynamic characteristic detection module, a communication module, an equipment monitoring and circuit breaker fault diagnosis module and a health state display module; the device can carry out comprehensive diagnosis to performances such as 10kV vacuum circuit breaker mechanical properties, electrical properties, insulating properties, solve the regret that current tester product exists measurement function singleness, reach comprehensive testing circuit breaker performance, quick positioning circuit breaker trouble position provides the decision-making basis for the electric wire netting fortune dimension personnel. Meanwhile, the circuit breaker maintenance work is displayed in a test report form, a fault legend and a text description mode, the maintenance work content of each circuit breaker is clarified, and the maintenance work quality and efficiency are improved.
Description
Technical Field
The invention relates to the technical field of power equipment fault diagnosis, in particular to a fault diagnosis device and method for a 10kV vacuum circuit breaker.
Background
10kV vacuum circuit breaker is used as novel switchgear, replaces 10kV few oily circuit breaker in a large number and is generally used, and it has important effect to guarantee electric wire netting safety, steady operation. The 10kV vacuum circuit breaker manufacturers are numerous, due to design defects, technical errors and other reasons, the 10kV vacuum circuit breaker has more and more frequent faults, and the fault types can be classified into four types, namely contact faults, mechanical faults, insulation faults and electrical faults, so that the comprehensive evaluation on the overall performance of the high-voltage circuit breaker is carried out by adopting corresponding detection means and methods aiming at various state parameters of the 10kV vacuum circuit breaker, and the problem that the high-voltage circuit breaker can be continuously operated safely and reliably without replacement or needs to be replaced after serving for a plurality of teenagers is very necessary.
Due to condition limitation, parameters such as mechanical characteristics, electrical characteristics, insulating media and the like of the high-voltage circuit breaker are detected by different types of testers respectively at present, and due to the influence of uncertainty factors of testers and the testers, the detection effect is not ideal, the situation that faults reappear after the maintenance and operation is carried out frequently occurs, and the safety and the stability of the operation of a power grid are seriously threatened. At present, the performance parameters of the high-voltage circuit breaker are comprehensively detected, and meanwhile, a method for identifying the health state and evaluating the health level of the high-voltage circuit breaker based on a characteristic database and big data analysis is not applied in a related way.
Disclosure of Invention
The invention provides a fault diagnosis device for a 10kV vacuum circuit breaker, which can finish comprehensive diagnosis and health state display of the 10kV vacuum circuit breaker.
Still another object of the present invention is to provide a fault diagnosis method for a 10kV vacuum circuit breaker.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
a fault diagnosis apparatus for a 10kV vacuum circuit breaker, comprising: the circuit breaker dynamic characteristic detection module comprises an insulation resistance detection module, a power frequency withstand voltage detection module, a loop resistance detection module, a breaker dynamic characteristic detection module, a communication module, an equipment monitoring and breaker fault diagnosis module and a health state display module; insulation resistance detection module, power frequency withstand voltage detection module, return circuit resistance detection module, circuit breaker dynamic characteristic detection module utilize communication module to be connected to equipment monitoring and circuit breaker failure diagnosis module respectively, equipment monitoring and circuit breaker failure diagnosis module is connected through multiple table structure with health status display module.
Further, the equipment monitoring and circuit breaker fault diagnosis module sends an instruction to control the detection module to complete the tests of the insulation resistance, the power frequency withstand voltage, the conductive main loop resistance and the mechanical dynamic characteristics of the vacuum circuit breaker.
Further, the equipment monitoring and circuit breaker fault diagnosis module receives test data of each detection module, and original characteristic parameters of the 10kV vacuum circuit breaker are obtained.
Furthermore, a plurality of state characteristic databases of the vacuum circuit breaker are configured in the equipment monitoring and circuit breaker fault diagnosis module, the original data of the circuit breaker and the state characteristic databases are compared and analyzed by using a plurality of algorithms, and the state of the circuit breaker is divided into a normal state, an attention state, an abnormal state and a fault state to form a circuit breaker state diagnosis report.
Furthermore, the equipment monitoring and circuit breaker fault diagnosis module is a high-performance server, and the health state display module is an embedded computer.
Furthermore, the health state display module is combined with each tested circuit breaker, the test execution steps and the equipment state are displayed, the health state of the circuit breaker is evaluated in a report form after the test is finished, the fault position of the fault circuit breaker is indicated in a legend form, and the maintenance scheme of the fault circuit breaker is displayed in a text description mode.
A fault diagnosis method for a 10kV vacuum circuit breaker comprises the following steps:
s1: the method comprises the steps of performing tests by using a circuit breaker, respectively adjusting the circuit breaker into a normal state, an attention state, an abnormal state and a fault state, simulating and testing the electrical characteristics, the mechanical characteristics and the insulation and voltage resistance of the circuit breaker in each state, collecting fault points and processing measures corresponding to different states of the circuit breaker, sorting related basic data, and establishing a circuit breaker state feature library;
s2: comparing the test data of the equipment monitoring and circuit breaker fault diagnosis module with the parameters in the state feature library, and effectively identifying the health state of the circuit breaker by combining the latest industry standard;
s3: and marking the state of the circuit breaker as a normal state, an attention state, an abnormal state and a fault state according to the detection result, searching the feature library, finding a corresponding maintenance scheme, and finally displaying the diagnosis result according to a preset mode.
Further, the process of displaying the diagnosis result in the step S3 in a preset manner is:
s31: the method comprises the steps that the structure of the breaker is shown in a 10kV breaker panoramic graph mode, the health state of the breaker is shown according to a power frequency withstand voltage test, a contact loop resistance test and a breaker dynamic characteristic test, and the health states of all parts of the breaker are respectively shown according to diagnosis results;
s32: the power frequency withstand voltage test shows the power frequency withstand voltage capability of each phase of main loop to the ground, between phases and between an upper fracture and a lower fracture;
s33: the contact loop resistance test shows the direct current resistance value of each phase of conductive loop of the circuit breaker;
s34: the circuit breaker dynamic characteristic test shows the speed of the circuit breaker just opening, the speed of the circuit breaker just closing and the maximum speed, draws a travel-time curve and displays the instantaneous speed of the circuit breaker opening and closing;
s35: the circuit breaker dynamic characteristic test shows the stroke parameter of the fracture;
s36: the circuit breaker dynamic characteristic test shows the minimum action voltage values of the opening coil and the closing coil;
s37: the dynamic characteristic test of the circuit breaker shows the opening and closing time and synchronism of the fracture.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the fault diagnosis device provided by the invention can comprehensively diagnose the mechanical property, the electrical property, the insulation property and other properties of the 10kV vacuum circuit breaker, solves the defects of single measurement function and the like of the existing tester product, and achieves the effects of comprehensively detecting the performance of the circuit breaker and quickly positioning the fault part of the circuit breaker; the method is based on the 10kV vacuum circuit breaker state characteristic database analysis algorithm, and can be used for comprehensively diagnosing the states of all parts of the circuit breaker; the circuit breaker maintenance work is shown according to the test report, the fault legend and the text description, the maintenance work content of each circuit breaker is clarified, and the maintenance work quality and efficiency are improved; the invention comprehensively detects the mechanical characteristics, the electrical characteristics, the insulating property and the like of the 10kV vacuum circuit breaker, comprehensively evaluates the health state of each component of the circuit breaker by utilizing a state characteristic database analysis algorithm, and realizes the comprehensive diagnosis and the health state display of the 10kV vacuum circuit breaker.
Drawings
Fig. 1 is a schematic structural diagram of a fault diagnosis device of a 10kV vacuum circuit breaker in the invention;
the device comprises a detection module, an insulation resistance detection module and a control module, wherein 1, the insulation resistance detection module is used for detecting insulation resistance; 2. a power frequency withstand voltage detection module; 3. a loop resistance detection module; 4. a circuit breaker dynamic characteristic detection module; 5. a communication module; 6. the device monitoring and circuit breaker fault diagnosis module; 7. and a health status display module.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
As shown in fig. 1, the invention provides a device for fault diagnosis and health status display of a 10kV vacuum circuit breaker, which comprises an insulation resistance detection module 1, a power frequency withstand voltage detection module 2, a loop resistance detection module 3, a circuit breaker dynamic characteristic detection module 4, a communication module 5, an equipment monitoring and circuit breaker fault diagnosis module 6, and a health status display module 7.
Insulation resistance detection module 1, power frequency withstand voltage detection module 2, loop resistance detection module 3, circuit breaker dynamic characteristic detection module 4 piece utilize communication module 5 to be connected to equipment monitoring and circuit breaker failure diagnosis module 6 respectively, equipment monitoring and circuit breaker failure diagnosis module 6 is connected through multiple table structure with health status display module 7.
The insulation resistance detection module 1 detects the insulation resistance value between the three-phase main loop of the 10kV vacuum circuit breaker and the breaker safety ground. The test can diagnose the insulation damage fault of the three-phase main loop of the 10kV vacuum circuit breaker.
And the power frequency withstand voltage detection module 2 detects the insulation levels of the main circuit of the 10kV vacuum circuit breaker to the ground, between phases and between an upper fracture and a lower fracture. The module examines the insulation level of a main circuit of the circuit breaker, finds the insulation defect caused by the reduction of the vacuum degree of the arc extinguish chamber and measures the overvoltage capacity.
And the loop resistance detection module 3 detects the direct current resistance value of the three-phase main loop of the 10kV vacuum circuit breaker. The test can diagnose the contact state of the main contact of the 10kV vacuum circuit breaker, and the contact state in the vacuum arc extinguishing chamber is evaluated by testing the change of contact resistance under currents with different amplitudes.
The circuit breaker dynamic characteristic detection module 4 respectively detects the switching-on time and the switching-off time of the 10kV circuit breaker, the synchronism of switching-off and switching-on, the opening distance of a contact and the bouncing process during switching-on, and simultaneously detects the lowest action voltage of a switching-on contactor and a switching-off and switching-on electromagnet of an operating mechanism. The test can diagnose faults of the action mechanism and the electrical control of the 10kV vacuum circuit breaker.
The test data of the detection module are respectively uploaded to the equipment monitoring and circuit breaker fault diagnosis module by the communication module.
The equipment monitoring and circuit breaker fault diagnosis module 6 sends an instruction to control the detection module to complete the tests of the insulation resistance, the power frequency withstand voltage, the conductive main loop resistance and the mechanical dynamic characteristics of the circuit breaker; the equipment monitoring and circuit breaker fault diagnosis module receives test data of each detection module and stores all the test data in a classified manner; the equipment monitoring and circuit breaker fault diagnosis module 6 is internally provided with a plurality of state characteristic databases of the vacuum circuit breaker, compares and analyzes original detection data of the circuit breaker and the state characteristic databases by using a plurality of algorithms, and divides the state of the circuit breaker into a normal state, an attention state, an abnormal state and a fault state to form a circuit breaker state diagnosis report.
The health state display module 7 is combined with each tested circuit breaker, displays the test carrying steps and the equipment state, evaluates the health state of the circuit breaker in a report form after the test is finished, indicates the fault position of the fault circuit breaker in a legend form, and displays the maintenance scheme of the fault circuit breaker in a text description mode.
In the above technical solution, the equipment monitoring and circuit breaker fault diagnosis module 6 is a high performance server, and the health status display module 7 is an embedded computer.
The equipment monitoring and circuit breaker fault diagnosis module 6 diagnoses the health state of the circuit breaker by using the state feature library as follows:
the method comprises the steps of firstly, utilizing a breaker to perform tests, respectively adjusting the breaker to be in a normal state, an attention state, an abnormal state and a fault state, simulating and testing the electrical characteristics, the mechanical characteristics and the insulation and voltage resistance performance of the breaker in each state, collecting corresponding fault points and processing measures of the breaker in different states, sorting relevant basic data, and establishing a breaker state feature library.
And secondly, comparing the test data of the equipment monitoring and circuit breaker fault diagnosis module with parameters in a state feature library, and effectively identifying the health state of the circuit breaker by combining with the latest industry standard.
And thirdly, marking the state of the circuit breaker as a normal state, an attention state, an abnormal state and a fault state according to the detection result, retrieving the feature library and finding out a corresponding maintenance scheme.
A health state display module in the device displays the health state of the 10kV vacuum circuit breaker according to the following method and steps.
The first step shows the circuit breaker construction diagram in the form of a 10kV circuit breaker panorama.
And secondly, respectively displaying the health states of all parts of the circuit breaker according to power frequency withstand voltage test, contact loop resistance test and dynamic characteristic test diagnosis results of the circuit breaker.
And thirdly, power frequency voltage withstand test shows the power frequency voltage withstand capability of each phase (three phases in total) main loop to the ground, between phases and between an upper fracture and a lower fracture, for example, the power frequency voltage withstand value and the voltage withstand duration are shown, green opposite hooks show that the circuit breaker is qualified, red crosses show that the voltage withstand does not pass, a red flashing frame is used for showing the unqualified part of the circuit breaker test in the figure, and the surrounding characters are used for describing possible reasons such as the reduction of the vacuum degree of the arc.
And fourthly, a contact loop resistance test shows that the direct current resistance value of each phase of conductive loop of the circuit breaker is qualified, the green hook represents that the loop resistance is out of tolerance, the red fork represents that the loop resistance is out of tolerance, a red flashing frame represents the part with out of tolerance of the direct current resistance value in the graph, and characters are arranged around the part to describe possible reasons such as surface oxidation of a contact.
And fifthly, the dynamic characteristic test of the circuit breaker shows the speed of the circuit breaker just opening, the speed of the circuit breaker just closing and the maximum speed, a travel-time curve is drawn, and the instantaneous speed of the circuit breaker opening and closing is displayed. The green opposite hook in the figure shows that the speed is qualified, the red fork shows that the opening (closing) speed is out of tolerance, the red flashing frame in the figure shows the position of the energy storage spring, and the periphery is provided with word description processing measures, such as adjusting the length of the energy storage spring to ensure that the opening and closing speed reaches the standard.
And sixthly, displaying the stroke parameter of the fracture through the dynamic characteristic test of the circuit breaker. The green opposite hook in the figure shows that the contact is qualified, the red fork shows that the stroke is out of tolerance, a red flashing frame in the figure shows a part for adjusting the stroke, and word description processing measures are arranged around the part, such as increasing and decreasing buffer gaskets, so that the stroke of the contact reaches the standard size.
And a seventh step of circuit breaker dynamic characteristic test shows the lowest action voltage values of the opening coil and the closing coil, wherein a green opposite hook in the graph represents a qualified state, a red fork represents an action voltage out-of-tolerance state, a red flashing frame in the graph represents the positions of the opening coil and the closing coil, and word description processing measures are arranged around the red flashing frame, and if the action voltage out-of-tolerance state, a corresponding coil is prompted to be replaced.
And the eighth step of the dynamic characteristic test of the circuit breaker shows the opening and closing time and synchronism of the fracture, wherein a green paired hook shows that the fracture is qualified, a red fork shows that the interphase synchronism is out of tolerance, a red flashing frame shows that the interphase synchronism is adjusted, and text description processing measures are arranged around the interphase synchronism adjustment position, such as the length of a horizontal pull rod or a vertical guide rod.
Like reference numerals correspond to the same or similar parts;
the positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A fault diagnosis device for a 10kV vacuum circuit breaker, comprising: the circuit breaker fault diagnosis device comprises an insulation resistance detection module (1), a power frequency voltage withstand detection module (2), a loop resistance detection module (3), a circuit breaker dynamic characteristic detection module (4), a communication module (5), an equipment monitoring and circuit breaker fault diagnosis module (6) and a health state display module (7); insulation resistance detection module (1), power frequency withstand voltage detection module (2), return circuit resistance detection module (3), circuit breaker dynamic characteristic detection module (4) utilize communication module (5) to be connected to equipment monitoring and circuit breaker failure diagnosis module (6) respectively, equipment monitoring and circuit breaker failure diagnosis module (6) are connected with health status display module (7).
2. The fault diagnosis device for the 10kV vacuum circuit breaker according to claim 1, wherein the equipment monitoring and circuit breaker fault diagnosis module (6) sends instructions to control each detection module to complete the tests of the insulation resistance, the power frequency withstand voltage, the resistance of the conductive main loop and the mechanical dynamic characteristics of the vacuum circuit breaker.
3. The fault diagnosis device for the 10kV vacuum circuit breaker according to claim 2, wherein the equipment monitoring and circuit breaker fault diagnosis module (6) receives test data of each detection module to obtain original characteristic parameters of the 10kV vacuum circuit breaker.
4. The fault diagnosis device for the 10kV vacuum circuit breaker according to claim 3, wherein a vacuum circuit breaker state characteristic database is configured in the equipment monitoring and circuit breaker fault diagnosis module (6), and the circuit breaker state diagnosis report is formed by comparing and analyzing the circuit breaker raw data and the state characteristic database by using an algorithm.
5. The fault diagnosis device for 10kV vacuum circuit breaker according to claim 4, characterized in that the breaker state is classified into a normal state, an attention state, an abnormal state and a fault state.
6. The fault diagnosis device for 10kV vacuum circuit breakers according to claim 5, characterized in that the health status display module (7) displays the test proceeding steps and the equipment status in combination with each tested circuit breaker, and displays the results in their respective forms after the test is finished.
7. The fault diagnosis device for the 10kV vacuum circuit breaker according to claim 6, wherein after the test is finished, the health state of the circuit breaker is evaluated in a report form, the fault part of the fault circuit breaker is indicated in a legend form, and the maintenance scheme of the fault circuit breaker is displayed in a text description manner.
8. The fault diagnosis device for 10kV vacuum circuit breaker according to claim 7, wherein the equipment monitoring and circuit breaker fault diagnosis module (6) is a high performance server, and the health status display module (7) is an embedded computer.
9. A fault diagnosis method for a 10kV vacuum circuit breaker is characterized by comprising the following steps:
s1: the method comprises the steps of performing tests by using a circuit breaker, respectively adjusting the circuit breaker into a normal state, an attention state, an abnormal state and a fault state, simulating and testing the electrical characteristics, the mechanical characteristics and the insulation and voltage resistance of the circuit breaker in each state, collecting fault points and processing measures corresponding to different states of the circuit breaker, sorting related basic data, and establishing a circuit breaker state feature library;
s2: comparing the test data of the equipment monitoring and circuit breaker fault diagnosis module (6) with parameters in a state feature library, and effectively identifying the health state of the circuit breaker by combining the latest industry standard;
s3: and marking the state of the circuit breaker as a normal state, an attention state, an abnormal state and a fault state according to the detection result, searching the feature library, finding a corresponding maintenance scheme, and finally displaying the diagnosis result according to a preset mode.
10. The fault diagnosis method for the 10kV vacuum circuit breaker according to claim 9, wherein the process of displaying the diagnosis result in the step S3 in a preset manner is:
s31: the method comprises the steps that the structure of the breaker is shown in a 10kV breaker panoramic graph mode, the health state of the breaker is shown according to a power frequency withstand voltage test, a contact loop resistance test and a breaker dynamic characteristic test, and the health states of all parts of the breaker are respectively shown according to diagnosis results;
s32: the power frequency withstand voltage test shows the power frequency withstand voltage capability of each phase of main loop to the ground, between phases and between an upper fracture and a lower fracture;
s33: the contact loop resistance test shows the direct current resistance value of each phase of conductive loop of the circuit breaker;
s34: the circuit breaker dynamic characteristic test shows the speed of the circuit breaker just opening, the speed of the circuit breaker just closing and the maximum speed, draws a travel-time curve and displays the instantaneous speed of the circuit breaker opening and closing;
s35: the circuit breaker dynamic characteristic test shows the stroke parameter of the fracture;
s36: the circuit breaker dynamic characteristic test shows the minimum action voltage values of the opening coil and the closing coil;
s37: the dynamic characteristic test of the circuit breaker shows the opening and closing time and synchronism of the fracture.
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| CN111458630B (en) * | 2020-04-09 | 2022-09-06 | 广东电网有限责任公司 | Fault diagnosis method for high-voltage circuit breaker |
| CN112462142A (en) * | 2020-11-13 | 2021-03-09 | 无锡中科电气设备有限公司 | Insulation resistance testing device |
| CN112230140A (en) * | 2020-12-17 | 2021-01-15 | 广东电网有限责任公司佛山供电局 | Intelligent testing device for 10kV high-voltage circuit breaker |
| CN112230140B (en) * | 2020-12-17 | 2021-04-02 | 广东电网有限责任公司佛山供电局 | Intelligent testing device for 10kV high-voltage circuit breaker |
| CN114325373A (en) * | 2021-12-30 | 2022-04-12 | 江苏省如高高压电器有限公司 | High-voltage circuit breaker product line integrated test method |
| WO2023124140A1 (en) * | 2021-12-30 | 2023-07-06 | 江苏省如高高压电器有限公司 | High-voltage circuit breaker product line integration test method |
| CN116593881A (en) * | 2023-04-25 | 2023-08-15 | 国网河北省电力有限公司石家庄供电分公司 | Three-phase high-voltage contact resistor and switching characteristic testing device and method |
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