Circuit breaker operating mechanism non-contact detection method, system, equipment and medium

Abstract

The invention relates to the technical field of electric appliance detection, in particular to a circuit breaker operating mechanism non-contact detection method, system and equipment and a medium. A high-speed imaging sensor is used for collecting the movement of a moving contact of the circuit breaker operating mechanism to obtain a continuous travel curve; acquiring voltage and current information of the circuit breaker; the stroke curve, the voltage, the current and the time form a feature vector, and a continuous feature vector is obtained according to the collection time; and carrying out classification diagnosis on the feature vectors through an SVM classifier. According to the invention, the high-speed CCD imaging technology and the non-contact testing technology of the stroke speed are adopted, the direct relation between the action of the operating mechanism and the mechanical characteristics of the circuit breaker is analyzed, and the characteristic signals of the current change, energy storage, operating process and transmission part movement of the opening and closing coil are collected; and a circuit breaker test and mechanical fault identification system integrating electricity and images is established. Non-contact testing of the stroke speed is achieved, and testing of all types of high-voltage circuit breakers is completely covered.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electrical appliance detection, and in particular to a non-contact detection method, system, equipment and medium for a circuit breaker operating mechanism. Background Art

[0002] In recent years, standardized maintenance requirements have been proposed for high-voltage equipment such as circuit breakers and disconnectors. In order to obtain the switch health status more comprehensively, the A and B type maintenance have put forward periodic testing requirements for the switch opening and closing speed. However, for traditional high-voltage circuit breaker mechanical characteristics testing equipment, due to the diversity of switches, there are many types, quantities and accessories of sensors, complex and time-consuming installation, poor adaptability and even inability to install on site, and the accuracy does not meet the requirements, resulting in low work efficiency. The stroke and speed of many switches cannot be tested, and only the time index can be tested. The opening and closing speed, an important indicator for judging the health status of the switch, cannot be verified, and the internal faults of the switch equipment cannot be determined in a timely and accurate manner, which reduces the reliability of the equipment. Therefore, it is urgent to seek an effective detection method and technology for circuit breakers to overcome the shortcomings of the existing technology and improve the efficiency of detection. Summary of the invention

[0003] In view of the above problems, the present disclosure provides a method, system, device and medium for non-contact detection of a circuit breaker operating mechanism.

[0004] In a first aspect, a non-contact detection method for a circuit breaker operating mechanism is provided, the method comprising:

[0005] The high-speed imaging sensor is used to collect the movement of the moving contact of the circuit breaker operating mechanism to obtain a continuous travel curve;

[0006] Collect voltage and current information of circuit breakers;

[0007] The travel curve, voltage, current and time are combined into a feature vector, and a continuous feature vector is obtained according to the acquisition time;

[0008] The feature vector is classified and diagnosed through the SVM classifier.

[0009] Furthermore, the movement of the moving contact of the circuit breaker operating mechanism is collected by a high-speed imaging sensor to obtain a continuous travel curve, including:

[0010] Paste the stripe paper on the moving link of the circuit breaker and align the high-speed imaging sensor with the stripe paper;

[0011] When the circuit breaker performs opening and closing actions, the circuit breaker moving connecting rod drives the striped paper to move together. The high-speed imaging sensor records the movement trajectory of the striped paper and draws the travel curve of the striped paper to obtain the closing and opening travel curve of the circuit breaker moving contact.

[0012] Furthermore, the aluminum substrate is fixed on the driving connecting rod of the circuit breaker, and the stripe code paper is pasted on the aluminum substrate.

[0013] Furthermore, the striped paper is in the shape of long strips, and the stripes of the striped paper are perpendicular to the length direction of the striped paper;

[0014] The length direction of the striped paper is consistent with the moving direction of the linkage rod.

[0015] Furthermore, a current transformer and a voltage transformer are used to respectively collect voltage and current signals of the circuit breaker.

[0016] In a second aspect, a circuit breaker operating mechanism non-contact detection system includes: a collection unit, a feature unit and a diagnosis unit;

[0017] A collection unit, used for collecting the movement of the moving contact of the circuit breaker operating mechanism through a high-speed imaging sensor to obtain continuous motion frames;

[0018] The acquisition unit is also used to collect voltage and current information of the circuit breaker;

[0019] A feature unit is used to combine motion frames, voltage, current and time into a feature vector, and obtain a continuous feature vector according to the acquisition time;

[0020] The diagnosis unit is used to input the feature vector into the SVM classifier for classification diagnosis.

[0021] Furthermore, the acquisition unit includes: a high-speed imaging sensor for acquiring the movement of the moving contact of the circuit breaker operating mechanism, a voltage sensor for acquiring the circuit breaker voltage, and a current sensor for acquiring the circuit breaker current.

[0022] Furthermore, the movement of the moving contact of the circuit breaker operating mechanism is collected by a high-speed imaging sensor to obtain a continuous travel curve, including:

[0023] Paste the stripe paper on the moving link of the circuit breaker and align the high-speed imaging sensor with the stripe paper;

[0024] When the circuit breaker performs opening and closing actions, the circuit breaker moving connecting rod drives the striped paper to move together. The high-speed imaging sensor records the movement trajectory of the striped paper and draws the travel curve of the striped paper to obtain the closing and opening travel curve of the circuit breaker moving contact.

[0025] In a third aspect, an electronic device includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus;

[0026] a memory storing a computer program;

[0027] The processor is used to implement the above-mentioned non-contact detection method of the circuit breaker operating mechanism when executing the computer program stored in the memory.

[0028] In a fourth aspect, a computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, the non-contact detection method for a circuit breaker operating mechanism is implemented.

[0029] The present disclosure has at least the following beneficial effects:

[0030] The present invention adopts high-speed CCD imaging technology and non-contact testing technology of travel speed, analyzes the direct connection between the action of the operating mechanism and the mechanical characteristics of the circuit breaker, collects characteristic signals of the current change, energy storage, operating process and movement of the transmission components of the opening and closing coil, and establishes a circuit breaker testing and mechanical fault identification system integrating power collection and image. It realizes non-contact testing of travel speed and fully covers the testing of all types of high-voltage circuit breakers.

[0031] Other features and advantages of the present disclosure will be described in the following description, and partly become apparent from the description, or be understood by implementing the present disclosure. The purpose and other advantages of the present disclosure can be realized and obtained by the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 This is a flow chart of the detection method according to the embodiment of the present disclosure;

[0034] Figure 2 This is a schematic diagram of the structure of the detection device according to the embodiment of the present disclosure;

[0035] Figure 3 It is a schematic diagram of the structure of an electronic device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0037] like Figure 1 As shown, a non-contact detection method for a circuit breaker operating mechanism, the method comprising:

[0038] S101, collecting the movement of the moving contact of the circuit breaker operating mechanism through a high-speed imaging sensor to obtain a continuous travel curve;

[0039] S102, collecting voltage and current information of the circuit breaker;

[0040] S103, combining the travel curve, voltage, current and time into a feature vector, and obtaining a continuous feature vector according to the acquisition time;

[0041] S104, classifying and diagnosing the feature vector through a SVM classifier.

[0042] In one embodiment, the movement of the moving contact of the circuit breaker operating mechanism is collected by a high-speed imaging sensor to obtain a continuous travel curve, including:

[0043] Paste the stripe paper on the moving link of the circuit breaker and align the high-speed imaging sensor with the stripe paper;

[0044] When the circuit breaker performs opening and closing actions, the circuit breaker moving connecting rod drives the striped paper to move together. The high-speed imaging sensor records the movement trajectory of the striped paper and draws the travel curve of the striped paper to obtain the closing and opening travel curve of the circuit breaker moving contact.

[0045] In one embodiment, an aluminum substrate is fixed on a driving connecting rod of a circuit breaker, and a stripe code paper is pasted on the aluminum substrate.

[0046] In one embodiment, the striped paper is in the shape of a long strip, and the stripes of the striped paper are perpendicular to the length direction of the striped paper;

[0047] The length direction of the striped paper is consistent with the moving direction of the linkage rod.

[0048] In one embodiment, a current transformer and a voltage transformer are used to respectively collect voltage and current signals of the circuit breaker.

[0049] like Figure 2 As shown, a non-contact detection system for a circuit breaker operating mechanism includes: a collection unit 201, a feature unit 202 and a diagnosis unit 203;

[0050] The acquisition unit 201 is used to acquire the movement of the moving contact of the circuit breaker operating mechanism through a high-speed imaging sensor to obtain continuous motion frames;

[0051] The acquisition unit 201 is also used to acquire voltage and current information of the circuit breaker;

[0052] A feature unit 202, used to combine motion frames, voltage, current and time into a feature vector, and obtain a continuous feature vector according to the acquisition time;

[0053] The diagnosis unit 203 is used to input the feature vector into the SVM classifier for classification diagnosis.

[0054] In one embodiment, the acquisition unit 201 includes: a high-speed imaging sensor for acquiring the movement of the moving contact of the circuit breaker operating mechanism, a voltage sensor for acquiring the circuit breaker voltage, and a current sensor for acquiring the circuit breaker current.

[0055] In one embodiment, the movement of the moving contact of the circuit breaker operating mechanism is collected by a high-speed imaging sensor to obtain a continuous travel curve, including:

[0056] Paste the stripe paper on the moving link of the circuit breaker and align the high-speed imaging sensor with the stripe paper;

[0057] When the circuit breaker performs opening and closing actions, the circuit breaker moving connecting rod drives the striped paper to move together. The high-speed imaging sensor records the movement trajectory of the striped paper and draws the travel curve of the striped paper to obtain the closing and opening travel curve of the circuit breaker moving contact.

[0058] like Figure 3 As shown, the present disclosure provides an electronic device, including a processor 301, a communication interface 302, a memory 303 and a communication bus 304, wherein the processor 301, the communication interface 302 and the memory 303 communicate with each other through the communication bus 304;

[0059] Memory 303, storing computer programs;

[0060] The processor 301 is configured to implement the above method when executing the computer program stored in the memory 303 .

[0061] The present disclosure provides a computer-readable storage medium storing a computer program, wherein the computer program implements the above method when executed by a processor.

[0062] The computer-readable storage medium may be included in the device / apparatus described in the above embodiment; or it may exist independently without being assembled into the device / apparatus. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed, the method according to the embodiment of the present disclosure is implemented.

[0063] According to an embodiment of the present disclosure, a computer-readable storage medium may be a non-volatile computer-readable storage medium, for example, may include but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0064] In order to enable those skilled in the art to better understand the present disclosure, the principles of the present disclosure are described as follows in conjunction with examples:

[0065] The present invention solves the problems of complicated installation, wide variety, long time consumption and vibration error caused by poor sensor fixation in current circuit breaker detection field sensors. The following is an example of a hydropower station project:

[0066] From October 11, 2019 to date, the results have been applied in the field test of the 500kV Boshan substation of Laxiwa Hydropower Station, including the 201 circuit breaker on the 220kV side of the 500kV#1 main transformer, the 301 circuit breaker on the 35kV side of the 500kV#1 main transformer, the 5321 circuit breaker on the 500kV side of the 500kV#1 main transformer, the 220kV Bolin I loop 277 circuit breaker, and the 110kV Dashiqiao substation 110kV Dade line 172 circuit breaker. Through the application of different voltage levels, different manufacturers, models, and structures, horizontal comparison with traditional sensors, and vertical comparison with the manufacturer's technical requirements, the test data met expectations, improved the efficiency of the circuit breaker field test, achieved remarkable results, and the application was good. All indicators met expectations.

[0067] Before the application, according to statistics, the Laxiwa Hydropower Station suffered multiple circuit breaker failures every year due to circuit breaker mechanism problems and electrical failures, coil burnout, mechanism jamming and jamming, etc., which caused great losses. Among them, the reliability survey statistics of the circuit breakers that have been put into operation found that among all types of failures, the main failure was the operating mechanism failure, and the failure caused by the operating mechanism failure accounted for 64.8% of the total failures. Among the main causes of circuit breaker failure caused by circuit breaker operating mechanism failure, mechanical failures such as refusal to operate, false operation, slow separation and three-phase out of phase caused more than 80% of the total accidents. After the application of the results, through the all-round detection of the circuit breaker operating mechanism, the health level of the circuit breaker was greatly improved and the service life of the circuit breaker was extended.

[0068] Before the application of the results, some of the manufacturer's speed definitions could not be found, resulting in the inability to accurately judge the test results; speed sensors could not be installed due to structural reasons for many circuit breakers, and thus the circuit breaker speed test could not be carried out; the speed sensor had a short life, and the ability of the rotary sensor to collect signals decreased after a period of time, making it impossible to carry out the circuit breaker speed test, and the installation took a lot of time; after the application of the results, high-speed CCD imaging technology was used to achieve non-contact testing of travel speed; it can complete the testing of most types of high-voltage circuit breakers in our station; it has the characteristics of strong adaptability, high precision, and convenient testing, and can also save a lot of manpower, material resources, and financial resources to achieve the purpose of increasing production, increasing efficiency, and safety, thereby obtaining good economic and social benefits. The basis for calculating economic benefits:

[0069] (I) Save labor costs

[0070] After the implementation of the results, the test efficiency was greatly improved and the labor cost was reduced. The traditional method of measuring the mechanical characteristics of a circuit breaker requires 3 people to install the speed measuring bracket and various sensors, which takes 2-3 hours when all kinds of sensor accessories are complete. Based on the labor cost of 300 yuan / day, 8 hours of work per day, and an hourly wage of 37.5 yuan / hour, the Laxiwa Hydropower Station has about 200 circuit breakers to be inspected each year. The traditional inspection labor cost is: 200*3*3*37.5=67,500 yuan; the use of high-speed CCD imaging technology only requires 2 people, and the time is 0.5-1 hour. Only inspecting one circuit breaker can save 2 hours and reduce 1 inspection personnel. The labor cost is 200*2*1*37.5=15,000 yuan, directly saving 67,500-15,000=52,500 yuan in labor costs, creating direct economic benefits.

[0071] (II) Reducing grid losses

[0072] After the implementation of the results, the test efficiency was greatly improved, the power outage time was reduced, and the power outage loss was reduced: based on the 500kV Boshan transformer, the 500kV No. 2 main transformer has an average daily power of 56.66MW, and the residential electricity price is 0.36 yuan / kWh. According to the reduction of power outage time by 4*2=8 (hours), the average daily loss will be 5.666*0.36*8=163,100 yuan (based on the power outage loss of 8 on the three sides of the No. 2 main transformer, a total of 4 circuit breakers). Calculated by hours), 500kV Boshan substation has 22 circuit breakers in total. According to the pre-test cycle of 3 years, the power outage loss can be reduced by 5.666*0.36*22*2=897,050 yuan in three years, with an average of 897,050 / 3=299,020 yuan per year; currently our station manages 477 operating circuit breakers, which can reduce the power outage loss by about 5.666*0.36*477*2 / 3=6486,400 yuan per year on average.

[0073] (III) Improving circuit breaker health and extending life

[0074] According to the reliability survey statistics of the Laxiwa Hydropower Station on the circuit breakers that have been put into operation, it is found that among all the types of faults, the main fault is the operating mechanism failure, and the failure caused by the operating mechanism failure accounts for 64.8% of the total failures. Among the main reasons for the failure of the circuit breaker caused by the operating mechanism failure of the circuit breaker, the malicious accidents caused by mechanical failures such as refusal to operate, malfunction, slow separation and three-phase dyssynchrony account for more than 80% of the total accidents. After the implementation of the results, the health level of the circuit breaker has been greatly improved and the service life of the circuit breaker has been extended. According to the power outage losses caused by malfunctions such as circuit breakers, the Laxiwa Hydropower Station has 477 circuit breakers in operation, and the average repair (replacement) time for circuit breaker mechanism failure is 1 hour, saving a total of 477*1*0.648*0.8=247.27 hours and reducing power outage losses by about 5.666*0.36*247.27=5.0437 million yuan.

[0075] After the implementation of the results, the problem that we could not conduct targeted tests in actual situations was solved. The test data met expectations, improved the efficiency of on-site testing of circuit breakers, achieved remarkable results, and the application was good. All indicators met expectations, achieving good economic and social benefits. After the application of the results, the defects brought by the traditional signal acquisition method were fundamentally reformed, and the relevant data during the operation of the circuit breaker can be collected more accurately, and the change trend of the signal can be predicted when the fault does not occur, which meets the requirements of the rapid development of the power grid, and can reduce the power outage time caused by the maintenance of the circuit breaker, and ensure the reliability of power supply. It has high practical application value and promotion value.

[0076] Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A non-contact detection method for a circuit breaker operating mechanism, characterized in that: The method comprises: The high-speed imaging sensor is used to collect the movement of the moving contact of the circuit breaker operating mechanism to obtain a continuous travel curve; Collect voltage and current information of circuit breakers; The travel curve, voltage, current and time are combined into a feature vector, and a continuous feature vector is obtained according to the acquisition time; The feature vector is classified and diagnosed through the SVM classifier.

2. A non-contact detection method for a circuit breaker operating mechanism according to claim 1, characterized in that: The high-speed imaging sensor is used to collect the movement of the moving contact of the circuit breaker operating mechanism to obtain a continuous travel curve, including: Paste the stripe paper on the moving link of the circuit breaker and align the high-speed imaging sensor with the stripe paper; When the circuit breaker performs opening and closing actions, the circuit breaker moving connecting rod drives the striped paper to move together. The high-speed imaging sensor records the movement trajectory of the striped paper and draws the travel curve of the striped paper to obtain the closing and opening travel curve of the circuit breaker moving contact.

3. A non-contact detection method for a circuit breaker operating mechanism according to claim 2, characterized in that: Fix the aluminum base plate on the circuit breaker driving connecting rod and stick the stripe code paper to the aluminum base plate.

4. A non-contact detection method for a circuit breaker operating mechanism according to claim 2, characterized in that: The striped paper is in the shape of long strips, and the stripes of the striped paper are perpendicular to the length direction of the striped paper; The length direction of the striped paper is consistent with the moving direction of the linkage rod.

5. A non-contact detection method for a circuit breaker operating mechanism according to claim 1, characterized in that: Current transformers and voltage transformers are used to collect the voltage and current signals of the circuit breaker respectively.

6. A circuit breaker operating mechanism non-contact detection system, characterized in that: include: Acquisition unit, characterization unit and diagnosis unit; A collection unit, used for collecting the movement of the moving contact of the circuit breaker operating mechanism through a high-speed imaging sensor to obtain continuous motion frames; The acquisition unit is also used to collect voltage and current information of the circuit breaker; A feature unit is used to combine motion frames, voltage, current and time into a feature vector, and obtain a continuous feature vector according to the acquisition time; The diagnosis unit is used to input the feature vector into the SVM classifier for classification diagnosis.

7. A circuit breaker operating mechanism non-contact detection system according to claim 6, characterized in that: The acquisition unit includes: a high-speed imaging sensor for acquiring the movement of the moving contact of the circuit breaker operating mechanism, a voltage sensor for acquiring the circuit breaker voltage, and a current sensor for acquiring the circuit breaker current.

8. A circuit breaker operating mechanism non-contact detection system according to claim 6, characterized in that: The high-speed imaging sensor is used to collect the movement of the moving contact of the circuit breaker operating mechanism to obtain a continuous travel curve, including: Paste the stripe paper on the moving link of the circuit breaker and align the high-speed imaging sensor with the stripe paper; When the circuit breaker performs opening and closing actions, the circuit breaker moving connecting rod drives the striped paper to move together. The high-speed imaging sensor records the movement trajectory of the striped paper and draws the travel curve of the striped paper to obtain the closing and opening travel curve of the circuit breaker moving contact.

9. An electronic device, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; a memory storing a computer program; The processor is used to implement a non-contact detection method for a circuit breaker operating mechanism according to any one of claims 1 to 5 when executing a computer program stored in a memory.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, a non-contact detection method for a circuit breaker operating mechanism according to any one of claims 1 to 5 is implemented.

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