CN112731127A - High-voltage circuit breaker multi-dimensional fusion diagnosis device and method - Google Patents
High-voltage circuit breaker multi-dimensional fusion diagnosis device and method Download PDFInfo
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 14
- 238000004146 energy storage Methods 0.000 claims abstract description 11
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- G—PHYSICS
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- 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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Abstract
The invention discloses a multidimensional fusion diagnostic device and method for a high-voltage circuit breaker, which comprises a stroke displacement sensor, a switching-off current sensor, a switching-on current sensor, an energy storage current sensor, a vibration sensor, a noise sensor and a controller, wherein the switching-off current sensor, the switching-on current sensor and the energy storage current sensor are connected to the controller through a high-speed AD conversion unit, and the stroke displacement sensor, the vibration sensor and the noise sensor are connected to the controller through a digital quantity acquisition unit. The invention can know the running state of the breaker in real time, automatically diagnose the breaker to be overhauled by an automatic means, and push the breaker to the high-voltage breaker operation and maintenance monitoring center, thereby reducing power failure experiments, changing off-line detection into on-line monitoring, listing out items to be overhauled and improving the equipment overhauling efficiency.
Description
Technical Field
The invention belongs to the technical field of analysis and diagnosis of action characteristics of high-voltage switch equipment, and particularly relates to a multi-dimensional fusion diagnosis device and method for a high-voltage circuit breaker.
Background
Statistics show that 10% of high-voltage circuit breaker faults are caused by incorrect maintenance, the overhaul of the high-voltage circuit breaker is completely disassembled, time and cost are high, 1/3-1/2 of the whole high-voltage circuit breaker can be reached, and the disassembly and reassembly cause a plurality of defects, so that the generated accident examples are not exhaustive. Therefore, the high-voltage circuit breaker can fully exert the current breaking capacity only by ensuring proper opening/closing speed, reduce the electrical wear of the contact caused by pre-breakdown in the closing process and avoid contact burning loss, oil injection and even explosion. And at present, the conventional regular power failure maintenance is still used for the high-voltage circuit breaker by the power system, and the annual power failure experiment is carried out, including the test of the mechanical property of the circuit breaker mechanism and the like.
Along with the development of economy, the gradual expansion of the power grid, more and more circuit breakers are put into use, and the working pressure, the technical requirements and the like of power grid operation and maintenance maintainers are higher and higher.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the multi-dimensional fusion diagnosis device and method for the high-voltage circuit breaker are provided to solve the problems in the prior art.
The technical scheme adopted by the invention is as follows: the utility model provides a high voltage circuit breaker multidimension fuses diagnostic device, includes stroke displacement sensor, separating brake current sensor, combined floodgate current sensor, energy storage current sensor, vibration sensor, noise sensor and controller, and separating brake current sensor, combined floodgate current sensor, energy storage current sensor are connected to the controller through high-speed AD converting unit, and stroke displacement sensor, vibration sensor, noise sensor are connected to the controller through digital quantity acquisition unit.
Preferably, the controller adopts an STM32F407 chip, and the controller collects current by connecting an AD7606 chip.
Preferably, the controller is connected to the high-voltage circuit breaker operation and maintenance monitoring platform through a communication management unit.
Preferably, the communication management unit includes a LORA communication module, an RJ45 communication module, and a 4G wireless communication module.
Preferably, the controller is connected to a RAM memory calculation register and a ROM memory system register.
A diagnosis method of a multidimensional fusion diagnosis device of a high-voltage circuit breaker comprises the following steps: the method comprises the steps that sensor data of a stroke displacement sensor, a switching-off current sensor, a switching-on current sensor, an energy storage current sensor, a vibration sensor and a noise sensor are collected to form multi-dimensional heterogeneous collected information which is collected to a controller, the controller carries out state evaluation calculation and operation and maintenance strategy diagnosis, and finally, a diagnosis result is uploaded to an operation and maintenance monitoring center of the regional high-voltage circuit breaker.
A diagnosis method of a high-voltage circuit breaker multi-dimensional fusion diagnosis device comprises the following specific steps:
firstly, when the opening current or the closing current is collected, a current starting point is taken as a circuit breaker opening and closing action starting point, and a stroke displacement sensor, a vibration sensor and a noise sensor are called to start recording data;
secondly, after the travel displacement sensor finishes recording, the controller forms a Commride file (a general format for transient data exchange of a power system issued by IEEE), and the Commride file is an original file of the action and provides a data basis for analysis, maintenance and the like of the circuit breaker;
thirdly, performing multi-dimensional heterogeneous information linkage analysis through data of each sensor in Comtrade to judge the accuracy of information uploaded by the sensor;
fourthly, comparing and analyzing the multidimensional heterogeneous information linkage analysis with the characteristic point curve, judging the fault reason of the high-voltage circuit breaker, and sending the fault reason to a high-voltage circuit breaker operation and maintenance monitoring platform;
and fifthly, matching the maintenance strategy by the high-voltage circuit breaker operation and maintenance monitoring platform according to the fault reason, and generating a maintenance report by the maintenance strategy to be pushed to operation and maintenance staff.
Preferably, the multidimensional heterogeneous information linkage analysis in the third step includes: 1) analyzing the fitting degree of the action current and the mechanism stroke curve; 2) analyzing the fitting degree of the mechanism stroke and the circuit breaker vibration curve; 3) and (4) analyzing the fitting degree of the circuit breaker vibration and the circuit breaker noise curve.
1) The method for analyzing the fitting degree of the action current and the mechanism stroke curve comprises the following steps: when the breaker is opened and closed, the control device sends opening and closing current (action current for short) to control, when the action current occurs, the operating mechanism acts, the curve of the action current and the curve of the mechanism stroke have a fixed relation, whether the action process of the mechanism is consistent with the current process or not is verified through a fitting algorithm, if so, no fault is indicated, if not, a fault is indicated, and if not, the inconsistent nodes are recorded as first-class characteristic points; 2) the method for analyzing the fitting degree of the mechanism stroke and the circuit breaker vibration curve comprises the following steps: when the breaker performs opening and closing actions, the whole breaker vibrates due to the mechanism stroke actions, when the breaker is not assembled in place or a buffer cushion is loosened, the vibration time is lengthened, the fitting relation between the mechanism stroke curve and the vibration curve when the breaker leaves a factory is recorded, the fitting relation comprises the initial time, the process time and the end time of the two curves, and when the current ratio is beyond the set range (which can be set, generally +/-5 percent), the exceeding node is recorded as a second type of characteristic point; 3) the method for analyzing the fitting degree of the circuit breaker vibration and the circuit breaker noise curve comprises the following steps: when the breaker carries out the action of separating brake, closing a floodgate, the spring release energy can send great sound, and when the breaker assembly is not in place, or the blotter is not hard up, can cause the vibration time extension, and action sound can delay simultaneously, records the fitting relation between vibration curve and the noise curve when the breaker dispatches from the factory, when exceeding the settlement range, will surpass the node record and be third class characteristic point.
Matching maintenance strategies according to the three characteristic points: through the fault characteristics of the listed circuit breakers, fault characteristic nodes are analyzed to each type of characteristic points, and when the circuit breakers are analyzed to be in accordance with the three types of characteristic points, mutual demonstration is carried out through the three types of characteristic points.
The invention has the beneficial effects that: compared with the prior art, the method has the advantages that the running state of the breaker is known in real time, the breaker to be maintained is automatically diagnosed by an automatic means and pushed to the high-voltage breaker operation and maintenance monitoring center, so that power failure experiments are reduced, offline detection is changed into online monitoring, items to be maintained are listed, and the equipment maintenance efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of a controller;
fig. 3 is a schematic diagram of an AD7606 circuit connection structure.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
Example 1: as shown in fig. 1-3, a multidimensional fusion diagnostic device for a high-voltage circuit breaker comprises a stroke displacement sensor, a switching-off current sensor, a switching-on current sensor, an energy storage current sensor, a vibration sensor, a noise sensor and a controller, wherein the switching-off current sensor, the switching-on current sensor and the energy storage current sensor are connected to the controller through a high-speed AD conversion unit, and the stroke displacement sensor, the vibration sensor and the noise sensor are connected to the controller through a digital quantity acquisition unit.
Preferably, the controller adopts an STM32F407 chip as a central processing unit, and as shown in fig. 2, the controller has 3 serial ports 232, 1 serial port 485, 1 RJ45 network port, and two TTL extension ports, and is connected to the AD7606 bus (as shown in fig. 3) from the internal bus, and has 4 AD analog acquisition ports.
Preferably, the controller is connected to the high-voltage circuit breaker operation and maintenance monitoring platform through a communication management unit.
Preferably, the communication management unit includes a LORA communication module, an RJ45 communication module, and a 4G wireless communication module.
Preferably, the controller is connected with a RAM memory calculation register, a ROM memory system register, a power module and a clock module.
Example 2: a diagnosis method of a multidimensional fusion diagnosis device of a high-voltage circuit breaker comprises the following steps: the method comprises the steps that sensor data of a stroke displacement sensor, a switching-off current sensor, a switching-on current sensor, an energy storage current sensor, a vibration sensor and a noise sensor are collected to form multi-dimensional heterogeneous collected information which is collected to a controller, the controller carries out state evaluation calculation and operation and maintenance strategy diagnosis, and finally, a diagnosis result is uploaded to an operation and maintenance monitoring center of the regional high-voltage circuit breaker.
A diagnosis method of a high-voltage circuit breaker multidimensional fusion diagnosis device carries out linkage processing on collected multidimensional sensor data, and comprises the following specific steps:
firstly, when the opening current or the closing current is collected, a current starting point is taken as a circuit breaker opening and closing action starting point, and a stroke displacement sensor, a vibration sensor and a noise sensor are called to start recording data;
secondly, after the travel displacement sensor finishes recording, the controller forms a Commride file (a general format for transient data exchange of a power system issued by IEEE), and the Commride file is an original file of the action and provides a data basis for analysis, maintenance and the like of the circuit breaker;
thirdly, performing multi-dimensional heterogeneous information linkage analysis through each sensor data in Comtrade, which specifically comprises the following steps:
1) analyzing the fitting degree of the action current and the mechanism stroke curve;
2) analyzing the fitting degree of the mechanism stroke and the circuit breaker vibration curve;
3) analyzing the fitting degree of the circuit breaker vibration and the circuit breaker noise curve;
judging the accuracy of the information uploaded by the sensor through three times of fitting analysis;
fourthly, comparing and analyzing the action current curve, the mechanism stroke curve, the breaker vibration curve and the characteristic point curve, judging the fault reason of the high-voltage breaker, and uploading the fault reason to a high-voltage breaker operation and maintenance monitoring platform;
and fifthly, matching the maintenance strategy by the high-voltage circuit breaker operation and maintenance monitoring platform according to the fault reason, and generating a maintenance report by the maintenance strategy to be pushed to operation and maintenance staff.
In the third step, 1) the method for analyzing the fitting degree of the action current and the mechanism stroke curve comprises the following steps: when the breaker is opened and closed, the control device sends opening and closing current (action current for short) to control, when the action current occurs, the operating mechanism acts, the curve of the action current and the curve of the mechanism stroke have a fixed relation, whether the action process of the mechanism is consistent with the current process or not is verified through a fitting algorithm, if so, no fault is indicated, if not, a fault is indicated, and if not, the inconsistent nodes are recorded as first-class characteristic points; 2) the method for analyzing the fitting degree of the mechanism stroke and the circuit breaker vibration curve comprises the following steps: when the breaker performs opening and closing actions, the whole breaker vibrates due to the mechanism stroke actions, when the breaker is not assembled in place or a buffer cushion is loosened, the vibration time is lengthened, the fitting relation between the mechanism stroke curve and the vibration curve when the breaker leaves a factory is recorded, the fitting relation comprises the initial time, the process time and the end time of the two curves, and when the current ratio is beyond the set range (which can be set, generally +/-5 percent), the exceeding node is recorded as a second type of characteristic point; 3) the method for analyzing the fitting degree of the circuit breaker vibration and the circuit breaker noise curve comprises the following steps: when the breaker carries out the action of separating brake, closing a floodgate, the spring release energy can send great sound, and when the breaker assembly is not in place, or the blotter is not hard up, can cause the vibration time extension, and action sound can delay simultaneously, records the fitting relation between vibration curve and the noise curve when the breaker dispatches from the factory, when exceeding the settlement range, will surpass the node record and be third class characteristic point.
Matching maintenance strategies according to the three characteristic points: through the fault characteristics of the listed circuit breakers, fault characteristic nodes are analyzed to each type of characteristic points, and when the circuit breakers are analyzed to be in accordance with the three types of characteristic points, mutual demonstration is carried out through the three types of characteristic points. Such as: when the breaker cushion pad ages and drops, the time of the action curve can be monitored by the mechanism stroke sensor to be prolonged, and the vibration time of the breaker can be monitored by the vibration sensor to be prolonged.
The fault characteristic point tells the electric power operation and maintenance maintainer that the breaker has a fault, and the fault strategy library can know how to repair the fault. The method mainly comprises the steps of storing curve nodes behind characteristic points after a fault occurs, storing repair work contents after personnel go to a field to repair, mapping the repair work contents to each curve node of the characteristic points (data points collected by a stroke sensor, a vibration sensor and a noise sensor when the fault occurs), and directly providing a diagnosis strategy of the fault when other circuit breakers have the fault next time.
According to the invention, the monitoring of the relevant characteristic points of the high-voltage circuit breaker operating mechanism is realized, the multi-dimensional (various sensors) data is adopted for linkage evaluation, the accuracy of fault positioning is improved, and finally, a diagnosis strategy is formed through the high-voltage circuit breaker operation and maintenance monitoring, so that a maintainer is reminded to carry out corresponding maintenance work on the high-voltage circuit breaker.
The method is different from the traditional online monitoring technology in the greatest extent, and aims at providing a high-voltage circuit breaker maintenance strategy for final maintenance personnel, so that the power failure maintenance time is shortened.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and therefore, the scope of the present invention should be determined by the scope of the claims.
Claims (10)
1. A high voltage circuit breaker multidimensional fusion diagnostic device is characterized in that: the device comprises a stroke displacement sensor, a switching-off current sensor, a switching-on current sensor, an energy storage current sensor, a vibration sensor, a noise sensor and a controller, wherein the switching-off current sensor, the switching-on current sensor and the energy storage current sensor are connected to the controller through a high-speed AD conversion unit, and the stroke displacement sensor, the vibration sensor and the noise sensor are connected to the controller through a digital quantity acquisition unit.
2. The method for diagnosing the multidimensional fusion diagnostic device of the high-voltage circuit breaker according to claim 1, characterized in that: the controller adopts STM32F407 chip, and the controller is through connecting AD7606 chip acquisition current.
3. The method for diagnosing the multidimensional fusion diagnostic device of the high-voltage circuit breaker according to claim 1, characterized in that: the controller is connected to the high-voltage circuit breaker operation and maintenance monitoring platform through the communication management unit.
4. The method for diagnosing the multidimensional fusion diagnostic device of the high-voltage circuit breaker according to claim 3, characterized in that: the communication management unit comprises a LORA communication module, an RJ45 communication module and a 4G wireless communication module.
5. The method for diagnosing the multidimensional fusion diagnostic device of the high-voltage circuit breaker according to claim 1, characterized in that: the controller is connected with a RAM storage calculation register and a ROM storage system register.
6. The method for diagnosing the multidimensional fusion diagnostic device of the high-voltage circuit breaker according to any one of claims 1 to 5, characterized in that: the method comprises the following steps: the method comprises the steps that sensor data of a stroke displacement sensor, a switching-off current sensor, a switching-on current sensor, an energy storage current sensor, a vibration sensor and a noise sensor are collected to form multi-dimensional heterogeneous collected information which is collected to a controller, the controller carries out state evaluation calculation and operation and maintenance strategy diagnosis, and finally, a diagnosis result is uploaded to an operation and maintenance monitoring center of the regional high-voltage circuit breaker.
7. The method for diagnosing the multidimensional fusion diagnostic device of the high-voltage circuit breaker according to claim 6, characterized in that: the method comprises the following specific steps:
firstly, when the opening current or the closing current is collected, a current starting point is taken as a circuit breaker opening and closing action starting point, and a stroke displacement sensor, a vibration sensor and a noise sensor are called to start recording data;
secondly, after the travel displacement sensor finishes recording, the controller forms a Commride file which is an original file of the action;
thirdly, performing multi-dimensional heterogeneous information linkage analysis through data of each sensor in Comtrade to judge the accuracy of information uploaded by the sensor;
fourthly, comparing and analyzing the multidimensional heterogeneous information linkage analysis with the characteristic point curve, judging the fault reason of the high-voltage circuit breaker, and sending the fault reason to a high-voltage circuit breaker operation and maintenance monitoring platform;
and fifthly, matching the maintenance strategy by the high-voltage circuit breaker operation and maintenance monitoring platform according to the fault reason, and generating a maintenance report by the maintenance strategy to be pushed to operation and maintenance staff.
8. The method for diagnosing the multidimensional fusion diagnostic device of the high-voltage circuit breaker according to claim 7, characterized in that: the multi-dimensional heterogeneous information linkage analysis in the third step comprises the following steps: 1) analyzing the fitting degree of the action current and the mechanism stroke curve; 2) analyzing the fitting degree of the mechanism stroke and the circuit breaker vibration curve; 3) and (4) analyzing the fitting degree of the circuit breaker vibration and the circuit breaker noise curve.
9. The method for diagnosing the multidimensional fusion diagnostic device of the high-voltage circuit breaker according to claim 8, characterized in that: 1) the method for analyzing the fitting degree of the action current and the mechanism stroke curve comprises the following steps: when the breaker is subjected to opening and closing, opening and closing currents are sent by the controller to be controlled, when the action currents occur, the operating mechanism acts, the curve of the action currents and the curve of the mechanism stroke have a fixed relation, whether the action process of the mechanism is consistent with the current process or not is verified through a fitting algorithm, if so, no fault is indicated, if not, a fault is indicated, and if not, inconsistent nodes are recorded as first-class characteristic points; 2) the method for analyzing the fitting degree of the mechanism stroke and the circuit breaker vibration curve comprises the following steps: when the breaker performs opening and closing actions, the whole breaker vibrates due to the mechanism stroke actions, when the breaker is not assembled in place or a buffer cushion is loosened, the vibration time is lengthened, the fitting relation between the mechanism stroke curve and the vibration curve when the breaker leaves a factory is recorded, the fitting relation comprises the proportion of the initial time, the process time and the end time of the two curves, and when the current proportion is beyond the set range, the exceeding node is recorded as a second type of characteristic point; 3) the method for analyzing the fitting degree of the circuit breaker vibration and the circuit breaker noise curve comprises the following steps: when the breaker carries out the action of separating brake, closing a floodgate, spring release energy can make a sound, and when the breaker assembly is not in place, or the blotter is not hard up, can cause the vibration time extension, and action sound can delay simultaneously, records the fitting relation between vibration curve and the noise curve when the breaker dispatches from the factory, when exceeding the settlement scope, will surpass the node record and be third class characteristic point.
10. The method for diagnosing the multidimensional fusion diagnostic device of the high-voltage circuit breaker according to claim 9, characterized in that: matching maintenance strategies according to the three characteristic points: through the fault characteristics of the listed circuit breakers, fault characteristic nodes are analyzed to each type of characteristic points, and when the circuit breakers are analyzed to be in accordance with the three types of characteristic points, mutual demonstration is carried out through the three types of characteristic points.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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