CN110187264B - Method and device for determining mechanical recession of high-voltage circuit breaker - Google Patents
Method and device for determining mechanical recession of high-voltage circuit breaker Download PDFInfo
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- CN110187264B CN110187264B CN201910456274.4A CN201910456274A CN110187264B CN 110187264 B CN110187264 B CN 110187264B CN 201910456274 A CN201910456274 A CN 201910456274A CN 110187264 B CN110187264 B CN 110187264B
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Abstract
The invention provides a method and a device for determining mechanical recession of a high-voltage circuit breaker, wherein the method comprises the following steps: mechanical characteristic data in data obtained by a high-voltage circuit breaker type test are obtained, wherein the mechanical characteristic data comprise mechanical characteristic values corresponding to a plurality of discrete time points in each mechanical characteristic test in the type test; acquiring a standard reference mechanical characteristic value and a failure judgment value corresponding to each discrete time point; calculating the absolute value of the difference value between the mechanical characteristic value of each mechanical characteristic test corresponding to a discrete time point and the standard reference mechanical characteristic value to obtain a corresponding absolute value array; performing curve fitting on the absolute value sequence to obtain a regression curve corresponding to the discrete time point; the mechanical characteristic recession proportion is obtained according to the standard reference mechanical characteristic value, the failure judgment value and the recession curve corresponding to each discrete time point, namely the mechanical recession performance of the high-voltage circuit breaker can be determined based on the big data of the type test, and the method is favorable for pre-judging the faults of the high-voltage circuit breaker in advance and well preventing the faults.
Description
Technical Field
The invention relates to the technical field of circuit breaker detection, in particular to a method and a device for determining mechanical recession of a high-voltage circuit breaker.
Background
The high-voltage circuit breaker (or called high-voltage switch) is used for controlling a high-voltage circuit and is one of important electrical components in the high-voltage circuit. The high-voltage circuit breaker can not only cut off or close the no-load current and the load current in a high-voltage circuit, but also cut off the overload current and the short-circuit current through the action of the relay protection device when the system breaks down, has quite perfect arc extinguishing structure and enough current breaking capacity, can quickly cut off the fault part from the system when a certain part of the power system breaks down, reduces the power failure range, prevents the accident from expanding, protects various electrical equipment in the system from being damaged, and ensures the safe operation of the fault-free part of the system, therefore, the reliability of the high-voltage circuit breaker is related to whether the power system can safely operate or not, and is the basis for ensuring the normal operation of the power system.
As is known, mechanical faults are main faults of high-voltage circuit breakers, but currently, a commonly adopted type test can only determine whether the high-voltage circuit breakers manufactured by various manufacturers are qualified, but cannot judge the mechanical performance degradation of the high-voltage circuit breakers in actual operation, and is not beneficial to pre-judging the faults of the high-voltage circuit breakers in advance and preventing the faults, so that a power system fails.
Disclosure of Invention
In view of the above, the invention provides a method and an apparatus for determining mechanical degradation of a high-voltage circuit breaker, an electronic device, and a computer-readable storage medium, which can determine the mechanical degradation of the high-voltage circuit breaker based on big data of a type test, and solve the problem that the mechanical degradation of the high-voltage circuit breaker in actual operation cannot be judged, and the failure of the high-voltage circuit breaker cannot be pre-judged in advance and prevented, so that a power system fails.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, a method for determining mechanical degeneracy of a high-voltage circuit breaker is provided, which includes:
mechanical characteristic data in data obtained by a high-voltage circuit breaker type test are obtained, wherein the mechanical characteristic data comprise mechanical characteristic values corresponding to a plurality of discrete time points in each mechanical characteristic test in the type test;
acquiring a standard reference mechanical characteristic value and a failure judgment value corresponding to each discrete time point;
calculating the absolute value of the difference value between the mechanical characteristic value of each mechanical characteristic test corresponding to a discrete time point and the standard reference mechanical characteristic value to obtain a corresponding absolute value array;
performing curve fitting on the absolute value sequence to obtain a regression curve corresponding to the discrete time point;
and obtaining the mechanical characteristic recession proportion according to the standard reference mechanical characteristic value, the failure judgment value and the recession curve corresponding to each discrete time point.
Further, the mechanical characteristics adopt closing stroke, opening stroke, closing speed, opening speed, over travel, bounce time, closing time, opening time, closing different phases or opening different phases.
Further, the obtaining of the standard reference mechanical characteristic value and the failure judgment value corresponding to each discrete time point includes:
acquiring a standard reference mechanical characteristic value corresponding to each discrete time point according to a mechanical characteristic reference curve specified by a type test standard;
and adding the standard reference mechanical characteristic value corresponding to the discrete time point to the maximum standard reference mechanical characteristic value of the preset multiple to obtain a corresponding failure judgment value.
Further, the obtaining of the mechanical characteristic regression proportion according to the standard reference mechanical characteristic value, the failure judgment value and the regression curve corresponding to each discrete time point includes:
drawing a corresponding constant curve according to the standard reference mechanical characteristic value in a coordinate system which is the same as a decay curve corresponding to a discrete time point;
taking the absolute value corresponding to the coordinate point on the decline curve closest to the constant curve as the decline value of the discrete time point;
calculating the decay percentage corresponding to the discrete time point according to the decay value and the corresponding failure judgment value;
and taking the maximum value of the decay percentage corresponding to each discrete time point as the decay proportion of the mechanical characteristics.
Further, the calculating the decay percentage corresponding to the discrete time point according to the decay value and the corresponding failure judgment value includes:
dividing the decay value by the failure judgment value and multiplying by one hundred percent to obtain the decay percentage corresponding to the discrete time point.
In a second aspect, there is provided a device for determining mechanical degeneracy of a high-voltage circuit breaker, comprising:
the mechanical characteristic data acquisition module is used for acquiring mechanical characteristic data in data obtained by a high-voltage circuit breaker type test, wherein the mechanical characteristic data comprises mechanical characteristic values corresponding to a plurality of discrete time points in each mechanical characteristic test in the type test;
the reference value acquisition module is used for acquiring a standard reference mechanical characteristic value and a failure judgment value corresponding to each discrete time point;
the absolute value calculation module is used for calculating the absolute value of the difference value between the mechanical characteristic value of each mechanical characteristic test corresponding to a discrete time point and the standard reference mechanical characteristic value to obtain a corresponding absolute value sequence;
the curve fitting module is used for performing curve fitting on the absolute value array to obtain a regression curve corresponding to the discrete time point;
and the decline proportion calculation module is used for obtaining the mechanical characteristic decline proportion according to the standard reference mechanical characteristic value, the failure judgment value and the decline curve corresponding to each discrete time point.
Further, the mechanical characteristics adopt closing stroke, opening stroke, closing speed, opening speed, over travel, bounce time, closing time, opening time, closing different phases or opening different phases.
Further, the reference value obtaining module includes:
the standard reference mechanical characteristic value acquisition unit is used for acquiring a standard reference mechanical characteristic value corresponding to each discrete time point according to a mechanical characteristic reference curve specified by a type test standard;
and the failure judgment value acquisition unit is used for adding the standard reference mechanical characteristic value corresponding to the discrete time point to the maximum standard reference mechanical characteristic value of the preset multiple to obtain a corresponding failure judgment value.
Further, the decline proportion calculation module comprises:
a constant curve obtaining unit, which is used for drawing a corresponding constant curve according to the standard reference mechanical characteristic value in a coordinate system which is the same as the regression curve corresponding to a discrete time point;
a decline value acquisition unit, which takes the absolute value corresponding to the coordinate point on the decline curve closest to the constant curve as the decline value of the discrete time point;
the decline percentage calculation unit calculates the decline percentage corresponding to the discrete time point according to the decline value and the corresponding failure judgment value;
and the recession ratio selecting unit takes the maximum value of the recession percentage corresponding to each discrete time point as the mechanical characteristic recession ratio.
Further, the decline percentage calculation unit includes:
and the calculating subunit divides the decline value by the failure judgment value and multiplies the result by one hundred percent to obtain the decline percentage corresponding to the discrete time point.
In a third aspect, an electronic device is provided, which comprises a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the method for determining mechanical degradation of a high voltage circuit breaker when executing the program.
In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, realizes the steps of the method for determining the mechanical degeneracy of a high voltage circuit breaker as described above.
The invention provides a method and a device for determining mechanical recession of a high-voltage circuit breaker, electronic equipment and a computer readable storage medium, wherein the method comprises the following steps: mechanical characteristic data in data obtained by a high-voltage circuit breaker type test are obtained, wherein the mechanical characteristic data comprise mechanical characteristic values corresponding to a plurality of discrete time points in each mechanical characteristic test in the type test; acquiring a standard reference mechanical characteristic value and a failure judgment value corresponding to each discrete time point; calculating the absolute value of the difference value between the mechanical characteristic value of each mechanical characteristic test corresponding to a discrete time point and the standard reference mechanical characteristic value to obtain a corresponding absolute value array; performing curve fitting on the absolute value sequence to obtain a regression curve corresponding to the discrete time point; the mechanical characteristic recession proportion is obtained according to the standard reference mechanical characteristic value, the failure judgment value and the recession curve corresponding to each discrete time point, namely the mechanical recession performance of the high-voltage circuit breaker can be determined based on the big data of the type test, the high-voltage circuit breaker can be favorably pre-judged in advance and prevented, and the safe and reliable operation of the power system is effectively guaranteed.
Potential problems and declining trends of product performance can be pointed out for manufacturers, and improvement and upgrading of individual products are facilitated; for the industry, the common defects of the industry products can be found, and the common improvement and upgrading of the industry products are facilitated; for users, the product performance of each manufacturer is known to be good or bad and the potential problems of each manufacturer are known, so that the users can select products, the potential defects which need to be focused are determined, advance judgment can be carried out, and targeted remedial measures can be well taken; for the market, the performance is known to be good and bad, which is beneficial to good competition.
In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. In the drawings:
FIG. 1 is a schematic diagram of an architecture between a server S1 and a client device B1 according to an embodiment of the present invention;
FIG. 2 is a block diagram of the server S1, the client device B1 and the database server S2 according to an embodiment of the present invention;
fig. 3 is a first flowchart of a method for determining mechanical degeneracy of a high-voltage circuit breaker according to an embodiment of the present invention;
fig. 4 shows the specific steps of step S200 in fig. 3;
fig. 5 shows the specific steps of step S300 in fig. 3;
figure 6 shows closing stroke data in the form of discrete points in a coordinate system;
fig. 7 shows the number sequence of times-test travel values corresponding to the discrete time points, arranged one by one in the test order, in the form of discrete points in a coordinate system.
Fig. 8 shows a closing reference curve specified by the pattern test standard.
FIG. 9 shows a schematic diagram of a fitted regression curve;
FIG. 10 is a diagram illustrating a decay curve and a constant curve corresponding to a certain discrete time point;
fig. 11 is a block diagram of the structure of the mechanical degeneracy determining apparatus of the high voltage circuit breaker in the embodiment of the present invention;
fig. 12 is a block diagram of an electronic device according to an embodiment of the invention.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all 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 application.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application and the above-described drawings, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The existing type test only judges whether the high-voltage circuit breaker manufactured by each manufacturer is qualified, does not judge the mechanical performance degradation of the high-voltage circuit breaker in actual operation, is not beneficial to pre-judging the fault of the high-voltage circuit breaker in advance and preventing the fault, and further causes the fault of a power system.
In order to solve the above problems in the prior art, embodiments of the present invention provide a method and an apparatus for determining mechanical degeneracy of a high-voltage circuit breaker, an electronic device, and a computer-readable storage medium, which can determine the mechanical degeneracy of the high-voltage circuit breaker based on big data of a type test, and are beneficial to pre-judging faults of the high-voltage circuit breaker in advance and making prevention, thereby effectively ensuring safe and reliable operation of a power system.
In view of the above, the present application provides an apparatus for determining mechanical degradation of a high voltage circuit breaker, which may be a server S1, referring to fig. 1, where the server S1 may be communicatively connected to at least one client device B1, the client device B1 may send data obtained by multiple high voltage circuit breaker type tests to the server S1, and the server S1 may receive data obtained by multiple high voltage circuit breaker type tests online. The server S1 may perform online or offline preprocessing on the acquired data obtained by the multiple high-voltage circuit breaker type tests to acquire mechanical characteristic data in the data obtained by the high-voltage circuit breaker type tests, where the mechanical characteristic data includes mechanical characteristic values corresponding to multiple discrete time points in each mechanical characteristic test in the type tests; acquiring a standard reference mechanical characteristic value and a failure judgment value corresponding to each discrete time point; calculating the absolute value of the difference value between the mechanical characteristic value of each mechanical characteristic test corresponding to a discrete time point and the standard reference mechanical characteristic value to obtain a corresponding absolute value array; performing curve fitting on the absolute value sequence to obtain a regression curve corresponding to the discrete time point; and obtaining the mechanical characteristic recession proportion according to the standard reference mechanical characteristic value, the failure judgment value and the recession curve corresponding to each discrete time point. Then, the server S1 may send the mechanical feature degradation ratio to the client device B1 online. The client device B1 may receive the mechanical feature degradation ratio online.
Additionally, referring to FIG. 2, the server S1 may also be communicatively coupled to at least one database server S2, the database server S2 being configured to store historical pattern testing data. The database server S2 sends the historical pattern test data to the server S1 on line, and the server S1 can receive the historical pattern test data on line and then determine the mechanical degradation of the high-voltage circuit breaker according to the historical pattern test data.
Based on the above, the client device B1 may have a display interface so that the user can view the mechanical feature recession ratio sent by the server S1 according to the interface.
It is understood that the client device B1 may include a smart phone, a tablet electronic device, a network set-top box, a portable computer, a desktop computer, a Personal Digital Assistant (PDA), a vehicle-mounted device, a smart wearable device, etc. Wherein, intelligence wearing equipment can include intelligent glasses, intelligent wrist-watch, intelligent bracelet etc..
In practical applications, part of the method for determining the mechanical degeneracy of the high-voltage circuit breaker may be performed on the side of the server S1 as described above, that is, as shown in the architecture of fig. 1, all operations may be performed in the client device B1, and the client device B1 may be directly connected to the database server S2 in a communication manner. Specifically, the selection may be performed according to the processing capability of the client device B1, the limitation of the user usage scenario, and the like. This is not a limitation of the present application. If all the operations are completed in the client device B1, the client device B1 may further include a processor for performing a specific process of the high voltage circuit breaker mechanical degradation determination method.
The server and the client device may communicate using any suitable network protocol, including network protocols not yet developed at the filing date of this application. The network protocol may include, for example, a TCP/IP protocol, a UDP/IP protocol, an HTTP protocol, an HTTPS protocol, or the like. Of course, the network Protocol may also include, for example, an RPC Protocol (Remote Procedure Call Protocol), a REST Protocol (Representational State Transfer Protocol), and the like used above the above Protocol.
In order to determine the mechanical degradation of the high-voltage circuit breaker, an embodiment of the present application provides a method for determining the mechanical degradation of the high-voltage circuit breaker, and referring to fig. 3, the method for determining the mechanical degradation of the high-voltage circuit breaker specifically includes the following steps:
step S100: and acquiring mechanical characteristic data in data obtained by the high-voltage circuit breaker type test, wherein the mechanical characteristic data comprises mechanical characteristic values corresponding to a plurality of discrete time points in each mechanical characteristic test in the type test.
Wherein, whole type test includes electrical test and mechanical test etc. and mechanical characteristic test contains many times mechanical characteristic test, includes among the high voltage circuit breaker type test data: the mechanical degeneracy of the circuit breaker can be judged according to one of the mechanical characteristics when the mechanical degeneracy is determined. Namely: the mechanical characteristics can adopt closing stroke, opening stroke, closing speed, opening distance, overtravel, bounce time, closing time, opening time, different closing phases or different opening phases and the like.
It is worth to be noted that the different closing phases refer to the time difference of in-place closing between three phases of the circuit breaker every time of closing, and the time difference of in-place opening between three phases of the circuit breaker every time of opening in different opening phases.
Furthermore, all data must pass the model test and satisfy the test data specified in the standard GB 1984.
Further, taking the closing stroke as the mechanical characteristic for evaluating the mechanical degeneracy of the circuit breaker as an example, for a certain type of test, the closing stroke data (i.e., the mechanical characteristic data) obtained therefrom is the closing stroke values (3mm, 5mm, 8mm … …) corresponding to the discrete time points (10ms, 20ms, 30ms … …) after the start of the test.
Step S200: and acquiring a standard reference mechanical characteristic value and a failure judgment value corresponding to each discrete time point.
For each type of high-voltage circuit breaker, a mechanical characteristic reference curve provided by a manufacturer or specified by a type test standard is contained in an industry standard, generally, the horizontal axis of the mechanical characteristic reference curve is test time (namely discrete time point), the vertical axis of the mechanical characteristic reference curve is a mechanical characteristic value, and the mechanical characteristic reference curve represents mechanical characteristic values corresponding to different test time.
Specifically, a corresponding standard reference mechanical characteristic value and a failure judgment value can be obtained according to the mechanical characteristic reference curve.
Step S300: and calculating the absolute value of the difference value between the mechanical characteristic value of each mechanical characteristic test corresponding to a discrete time point and the standard reference mechanical characteristic value to obtain a corresponding absolute value array.
For a certain discrete time, the mechanical characteristic values corresponding to different mechanical characteristic tests (for example, a first mechanical characteristic test, a second mechanical characteristic test and a third mechanical characteristic test for the same high-voltage circuit breaker) are different, and for a certain discrete time point, the absolute value of the difference between the mechanical characteristic value corresponding to the discrete time point and the standard reference mechanical characteristic value corresponding to the discrete time point is sequentially calculated according to the test sequence, so as to obtain a corresponding absolute value sequence.
Step S400: and performing curve fitting on the absolute value sequence to obtain a regression curve corresponding to the discrete time point.
Wherein, the least square method can be adopted to carry out curve fitting by using tools such as Origin, matlab, openGL and the like.
Step S500: and obtaining the mechanical characteristic recession proportion according to the standard reference mechanical characteristic value, the failure judgment value and the recession curve corresponding to each discrete time point.
Wherein the mechanical characteristic degradation is quantified in terms of the degree to which the degradation curve deviates from a standard reference mechanical characteristic value.
In summary, the method for determining the mechanical degeneracy of the high-voltage circuit breaker provided by the embodiment can determine the mechanical degeneracy of the high-voltage circuit breaker based on the big data of the type test, is beneficial to pre-judging the fault of the high-voltage circuit breaker in advance and preventing the fault, and effectively ensures the safe and reliable operation of the power system.
In an alternative embodiment, this step S200 may include the following, see fig. 4:
step S210: and acquiring a standard reference mechanical characteristic value corresponding to each discrete time point according to a mechanical characteristic reference curve specified by a type test standard.
Step S220: and adding the standard reference mechanical characteristic value corresponding to the discrete time point to the maximum standard reference mechanical characteristic value of the preset multiple to obtain a corresponding failure judgment value.
And the maximum standard reference mechanical characteristic value is the maximum value in the standard reference mechanical characteristic values corresponding to all the discrete time points.
The preset multiple can be selected according to the precision requirement, and can be 2% -15%, and preferably 5%.
In an alternative embodiment, this step S500 may include the following, see fig. 5:
step S510: and drawing a corresponding constant curve according to the standard reference mechanical characteristic value in the same coordinate system of the regression curve corresponding to a discrete time point.
Wherein, for a certain discrete time point, the corresponding standard reference mechanical characteristic value is a fixed value, so the constant curve is a straight line.
Step S520: and taking the absolute value corresponding to the coordinate point on the decay curve closest to the constant curve as the decay value of the discrete time point.
Each discrete time point can obtain a corresponding recession value, and the recession values corresponding to the plurality of discrete time points form a series.
Step S530: and calculating the decay percentage corresponding to the discrete time point according to the decay value and the corresponding failure judgment value.
Specifically, the decay percentage corresponding to the discrete time point is obtained by dividing the decay value by the failure determination value and multiplying by one hundred percent.
Step S540: and taking the maximum value of the decay percentage corresponding to each discrete time point as the decay proportion of the mechanical characteristics.
The maximum fading percentage indicates that the mechanical characteristic fading is more serious, so that the maximum fading percentage corresponding to each discrete time point is selected as the fading proportion of the mechanical characteristic, and the mechanical fading performance can be more generally indicated.
The method for determining the mechanical recession of the high-voltage circuit breaker provided by the embodiment of the invention is described in detail below by taking the closing formation as a mechanical characteristic:
(1) and acquiring closing stroke data in the data obtained by the high-voltage circuit breaker type test, wherein the closing stroke data comprises closing stroke values corresponding to a plurality of discrete time points in each mechanical characteristic test in the type test.
Integrating closing stroke data of the circuit breaker in the type test according to the test sequence, wherein a closing data set H { [ S ]p(th)，th]1,2,3, … n; h is 1,2,3, … }, where p represents the p-th closing, h is the h discrete time point, Sp(th) Represents the p-th closing time thThe closing position at the moment (i.e., closing stroke). Referring to FIG. 6, stroke values S1-SN corresponding to discrete time points t 1-tN obtained by P1-Pn model tests are shown. Arranging all closing data one by one according to the test sequence to obtain a number series M of times-test travel values corresponding to each discrete time pointh＝{[S1(th)，th]，[S2(th)，th]，[S3(th)，th]，…,[Sn(th)，th]. Referring to fig. 7, the closing positions corresponding to the tests from time t1 to time tN are shown.
(2) A closing reference curve (see fig. 8) specified by a type test standard is obtained, and corresponding reference stroke values on the reference curve are taken according to discrete time points, such as [ S (t1), t1], [ S (t2), t2], [ S (t3), t3], …, [ S (th), th ], which are called standard reference stroke values.
(3) And adding the standard reference closing stroke value corresponding to the discrete time point to the maximum standard reference closing stroke value which is 5% times of the maximum standard reference closing stroke value to obtain a corresponding failure judgment value.
(4) And subtracting the corresponding standard reference travel value from the corresponding test travel value sequence for each discrete time point, and taking absolute values to sequentially arrange into a test travel difference value sequence.
(5) Fitting a curve to the number series of times corresponding to each discrete time point and the test stroke difference value delta S to form a regression curve, and referring to FIG. 9, showing the regression curve corresponding to the time t 1-tN.
(6) A corresponding constant curve S (t') is plotted according to the standard reference closing stroke value in the same coordinate system as the decay curve, see fig. 10.
(7) And taking the absolute value corresponding to the coordinate point on the decay curve closest to the constant curve as the decay value of the discrete time point.
(8) And dividing the decay value by the failure judgment value and multiplying by one hundred percent to obtain the decay percentage corresponding to the discrete time point.
(9) And taking the maximum value of the recession percentage corresponding to each discrete time point as the recession proportion of the closing stroke.
Based on the same inventive concept, the embodiments of the present application further provide various apparatuses for determining mechanical degeneracy of a high-voltage circuit breaker, which can be used to implement the methods described in the above embodiments, as described in the following embodiments. The principle of solving the problems of the high-voltage circuit breaker mechanical degradation determining device is similar to that of the method, so the implementation of the high-voltage circuit breaker mechanical degradation determining device can refer to the implementation of the method, and repeated parts are not described again. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 11 is a block diagram of the structure of the device for determining the mechanical degeneracy of the high-voltage circuit breaker in the embodiment of the present invention. As shown in fig. 11, the device for determining the mechanical degradation of the high-voltage circuit breaker specifically includes: the device comprises a mechanical characteristic data acquisition module 10, a reference value acquisition module 20, an absolute value calculation module 30, a curve fitting module 40 and a decline proportion calculation module 50.
The mechanical characteristic data acquisition module 10 acquires mechanical characteristic data in data obtained by a high-voltage circuit breaker type test, wherein the mechanical characteristic data comprises mechanical characteristic values corresponding to a plurality of discrete time points in each mechanical characteristic test in the type test.
Wherein, whole type test includes electrical test and mechanical test etc. and mechanical characteristic test contains many times mechanical characteristic test, includes among the high voltage circuit breaker type test data: the mechanical degeneracy of the circuit breaker can be judged according to one of the mechanical characteristics when the mechanical degeneracy is determined. Namely: the mechanical characteristics can adopt closing stroke, opening stroke, closing speed, opening distance, overtravel, bounce time, closing time, opening time, different closing phases or different opening phases and the like.
It is worth to be noted that the different closing phases refer to the time difference of in-place closing between three phases of the circuit breaker every time of closing, and the time difference of in-place opening between three phases of the circuit breaker every time of opening in different opening phases.
Furthermore, all data must pass the model test and satisfy the test data specified in the standard GB 1984.
Further, taking the closing stroke as the mechanical characteristic for evaluating the mechanical degeneracy of the circuit breaker as an example, for a certain type of test, the closing stroke data (i.e., the mechanical characteristic data) obtained therefrom is the closing stroke values (3mm, 5mm, 8mm … …) corresponding to the discrete time points (10ms, 20ms, 30ms … …) after the start of the test.
The reference value obtaining module 20 obtains a standard reference mechanical characteristic value and a failure judgment value corresponding to each discrete time point.
For each type of high-voltage circuit breaker, a mechanical characteristic reference curve provided by a manufacturer or specified by a type test standard is contained in an industry standard, generally, the horizontal axis of the mechanical characteristic reference curve is test time (namely discrete time point), the vertical axis of the mechanical characteristic reference curve is a mechanical characteristic value, and the mechanical characteristic reference curve represents mechanical characteristic values corresponding to different test time.
Specifically, a corresponding standard reference mechanical characteristic value and a failure judgment value can be obtained according to the mechanical characteristic reference curve.
The absolute value calculation module 30 calculates an absolute value of a difference between the mechanical characteristic value of each mechanical characteristic test corresponding to a discrete time point and the standard reference mechanical characteristic value, and obtains a corresponding absolute value sequence.
For a certain discrete time, the mechanical characteristic values corresponding to different mechanical characteristic tests (for example, a first mechanical characteristic test, a second mechanical characteristic test and a third mechanical characteristic test for the same high-voltage circuit breaker) are different, and for a certain discrete time point, the absolute value of the difference between the mechanical characteristic value corresponding to the discrete time point and the standard reference mechanical characteristic value corresponding to the discrete time point is sequentially calculated according to the test sequence, so as to obtain a corresponding absolute value sequence.
The curve fitting module 40 performs curve fitting on the absolute value sequence to obtain a regression curve corresponding to the discrete time point.
Wherein, the least square method can be adopted to carry out curve fitting by using tools such as Origin, matlab, openGL and the like.
The regression proportion calculation module 50 obtains the mechanical characteristic regression proportion according to the standard reference mechanical characteristic value, the failure judgment value and the regression curve corresponding to each discrete time point.
Wherein the mechanical characteristic degradation is quantified in terms of the degree to which the degradation curve deviates from a standard reference mechanical characteristic value.
In conclusion, the device for determining the mechanical degeneracy of the high-voltage circuit breaker provided by the embodiment can determine the mechanical degeneracy of the high-voltage circuit breaker based on the big data of the type test, is favorable for prejudging the fault of the high-voltage circuit breaker in advance and preventing the fault, and effectively ensures the safe and reliable operation of a power system.
In an alternative embodiment, the reference value obtaining module 20 may include: a standard reference mechanical characteristic value acquisition unit and a failure judgment value acquisition unit.
The standard reference mechanical characteristic value acquisition unit acquires a standard reference mechanical characteristic value corresponding to each discrete time point according to a mechanical characteristic reference curve specified by a type test standard;
the failure judgment value acquisition unit adds the standard reference mechanical characteristic value corresponding to a discrete time point to the maximum standard reference mechanical characteristic value of the preset multiple to obtain a corresponding failure judgment value.
And the maximum standard reference mechanical characteristic value is the maximum value in the standard reference mechanical characteristic values corresponding to all the discrete time points.
The preset multiple can be selected according to the precision requirement, and can be 2% -15%, and preferably 5%.
In an alternative embodiment, the regression proportion calculation module 50 may include: the device comprises a constant curve acquisition unit, a decline value acquisition unit, a decline percentage calculation unit and a decline proportion selection unit.
And the constant curve acquisition unit is used for drawing a corresponding constant curve according to the standard reference mechanical characteristic value in a coordinate system which is the same as the regression curve corresponding to a discrete time point.
Wherein, for a certain discrete time point, the corresponding standard reference mechanical characteristic value is a fixed value, so the constant curve is a straight line.
And the decline value acquisition unit takes the absolute value corresponding to the coordinate point on the decline curve closest to the constant curve as the decline value of the discrete time point.
Each discrete time point can obtain a corresponding recession value, and the recession values corresponding to the plurality of discrete time points form a series.
And the decline percentage calculation unit calculates the decline percentage corresponding to the discrete time point according to the decline value and the corresponding failure judgment value.
And the decay proportion selecting unit takes the maximum value of the decay percentage corresponding to each discrete time point as the mechanical characteristic decay proportion.
The maximum fading percentage indicates that the mechanical characteristic fading is more serious, so that the maximum fading percentage corresponding to each discrete time point is selected as the fading proportion of the mechanical characteristic, and the mechanical fading performance can be more generally indicated.
In an alternative embodiment, the degradation percentage calculating unit may include: and the calculating subunit is used for dividing the decline value by the failure judgment value and multiplying the result by one hundred percent to obtain the decline percentage corresponding to the discrete time point.
The apparatuses, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or implemented by a product with certain functions. A typical implementation device is an electronic device, which may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
In a typical example, the electronic device specifically includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor implements the following steps when executing the program:
mechanical characteristic data in data obtained by multiple high-voltage circuit breaker type tests are obtained, wherein the mechanical characteristic data comprise mechanical characteristic values corresponding to multiple discrete time points in each type test;
acquiring a standard reference mechanical characteristic value and a failure judgment value corresponding to each discrete time point;
calculating the absolute value of the difference value between the mechanical characteristic value of each type test corresponding to a discrete time point and the standard reference mechanical characteristic value to obtain a corresponding absolute value array;
performing curve fitting on the absolute value sequence to obtain a regression curve corresponding to the discrete time point;
and obtaining the mechanical characteristic recession proportion according to the standard reference mechanical characteristic value, the failure judgment value and the recession curve corresponding to each discrete time point.
As can be seen from the above description, the electronic device provided in the embodiment of the present invention can be used to determine the mechanical degradation of the high-voltage circuit breaker, and is beneficial to pre-judging the fault of the high-voltage circuit breaker in advance and making a prevention, thereby effectively ensuring safe and reliable operation of the power system.
Referring now to FIG. 12, shown is a schematic diagram of an electronic device 600 suitable for use in implementing embodiments of the present application.
As shown in fig. 12, the electronic apparatus 600 includes a Central Processing Unit (CPU)601 that can perform various appropriate works and processes according to a program stored in a Read Only Memory (ROM)602 or a program loaded from a storage section 608 into a Random Access Memory (RAM)) 603. In the RAM603, various programs and data necessary for the operation of the system 600 are also stored. The CPU601, ROM602, and RAM603 are connected to each other via a bus 604. An input/output (I/O) interface 605 is also connected to bus 604.
The following components are connected to the I/O interface 605: an input portion 606 including a keyboard, a mouse, and the like; an output portion 607 including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker; a storage section 608 including a hard disk and the like; and a communication section 609 including a network interface card such as a LAN card, a modem, or the like. The communication section 609 performs communication processing via a network such as the internet. The driver 610 is also connected to the I/O interface 606 as needed. A removable medium 611 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 610 as necessary, so that a computer program read out therefrom is mounted as necessary on the storage section 608.
In particular, according to an embodiment of the present invention, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, an embodiment of the invention includes a computer-readable storage medium having a computer program stored thereon, which when executed by a processor, performs the steps of:
mechanical characteristic data in data obtained by multiple high-voltage circuit breaker type tests are obtained, wherein the mechanical characteristic data comprise mechanical characteristic values corresponding to multiple discrete time points in each type test;
acquiring a standard reference mechanical characteristic value and a failure judgment value corresponding to each discrete time point;
calculating the absolute value of the difference value between the mechanical characteristic value of each type test corresponding to a discrete time point and the standard reference mechanical characteristic value to obtain a corresponding absolute value array;
performing curve fitting on the absolute value sequence to obtain a regression curve corresponding to the discrete time point;
and obtaining the mechanical characteristic recession proportion according to the standard reference mechanical characteristic value, the failure judgment value and the recession curve corresponding to each discrete time point.
As can be seen from the above description, the computer-readable storage medium provided in the embodiment of the present invention can be used to determine the mechanical degeneracy of the high-voltage circuit breaker, so as to facilitate the prejudgment of the fault of the high-voltage circuit breaker and the prevention, and effectively ensure the safe and reliable operation of the power system.
In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 609, and/or installed from the removable medium 611.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A method for determining mechanical degeneracy of a high-voltage circuit breaker is characterized by comprising the following steps:
mechanical characteristic data in data obtained by a high-voltage circuit breaker type test are obtained, wherein the mechanical characteristic data comprise mechanical characteristic values corresponding to a plurality of discrete time points in each mechanical characteristic test in the type test;
acquiring a standard reference mechanical characteristic value and a failure judgment value corresponding to each discrete time point;
calculating the absolute value of the difference value between the mechanical characteristic value of each mechanical characteristic test corresponding to a discrete time point and the standard reference mechanical characteristic value to obtain a corresponding absolute value array;
performing curve fitting on the absolute value sequence to obtain a regression curve corresponding to the discrete time point;
obtaining a mechanical characteristic decline proportion according to the standard reference mechanical characteristic value, the failure judgment value and the decline curve corresponding to each discrete time point;
the method for obtaining the mechanical characteristic regression proportion according to the standard reference mechanical characteristic value, the failure judgment value and the regression curve corresponding to each discrete time point comprises the following steps:
drawing a corresponding constant curve according to the standard reference mechanical characteristic value in a coordinate system which is the same as a decay curve corresponding to a discrete time point;
taking the absolute value corresponding to the coordinate point on the decline curve closest to the constant curve as the decline value of the discrete time point;
calculating the decay percentage corresponding to the discrete time point according to the decay value and the corresponding failure judgment value;
and taking the maximum value of the decay percentage corresponding to each discrete time point as the decay proportion of the mechanical characteristics.
2. The method of claim 1, wherein the mechanical characteristic is selected from a closing stroke, an opening stroke, a closing speed, an opening speed, an over travel, a bounce time, a closing time, an opening time, a closing off time, and a closing off time or a closing off time.
3. The method for determining the mechanical degeneracy of the high-voltage circuit breaker according to claim 1, wherein the obtaining of the standard reference mechanical characteristic value and the failure judgment value corresponding to each discrete time point comprises:
acquiring a standard reference mechanical characteristic value corresponding to each discrete time point according to a mechanical characteristic reference curve specified by a type test standard;
and adding the standard reference mechanical characteristic value corresponding to the discrete time point to the maximum standard reference mechanical characteristic value of the preset multiple to obtain a corresponding failure judgment value.
4. The method for determining the mechanical degeneracy of the high-voltage circuit breaker according to claim 1, wherein the calculating the percentage of degeneracy corresponding to the discrete time point according to the degeneracy value and the corresponding failure judgment value comprises:
and dividing the decay value by the failure judgment value and multiplying by one hundred percent to obtain the decay percentage corresponding to the discrete time point.
5. A high voltage circuit breaker mechanical degradation determination apparatus, comprising:
the mechanical characteristic data acquisition module is used for acquiring mechanical characteristic data in data obtained by a high-voltage circuit breaker type test, wherein the mechanical characteristic data comprises mechanical characteristic values corresponding to a plurality of discrete time points in each mechanical characteristic test in the type test;
the reference value acquisition module is used for acquiring a standard reference mechanical characteristic value and a failure judgment value corresponding to each discrete time point;
the absolute value calculation module is used for calculating the absolute value of the difference value between the mechanical characteristic value of each mechanical characteristic test corresponding to a discrete time point and the standard reference mechanical characteristic value to obtain a corresponding absolute value sequence;
the curve fitting module is used for performing curve fitting on the absolute value sequence to obtain a regression curve corresponding to the discrete time point;
the decline proportion calculation module is used for obtaining a mechanical characteristic decline proportion according to the standard reference mechanical characteristic value, the failure judgment value and the decline curve corresponding to each discrete time point;
wherein the decline proportion calculation module comprises:
the constant curve acquisition unit is used for drawing a corresponding constant curve according to the standard reference mechanical characteristic value in a coordinate system which is the same as a decay curve corresponding to a discrete time point;
a decay value acquisition unit, which takes the absolute value corresponding to the coordinate point on the decay curve closest to the constant curve as the decay value of the discrete time point;
the decline percentage calculation unit calculates the decline percentage corresponding to the discrete time point according to the decline value and the corresponding failure judgment value;
and the recession ratio selecting unit takes the maximum value of the recession percentage corresponding to each discrete time point as the mechanical characteristic recession ratio.
6. The apparatus of claim 5, wherein the mechanical characteristic is selected from a closing stroke, an opening stroke, a closing speed, an opening speed, an over travel, a bounce time, a closing time, an opening time, a closing off time, and a closing off time or a closing off time.
7. The high voltage circuit breaker mechanical degradation determination apparatus of claim 5, wherein the reference value acquisition module comprises:
the standard reference mechanical characteristic value acquisition unit is used for acquiring a standard reference mechanical characteristic value corresponding to each discrete time point according to a mechanical characteristic reference curve specified by a type test standard;
and the failure judgment value acquisition unit is used for adding the standard reference mechanical characteristic value corresponding to the discrete time point to the maximum standard reference mechanical characteristic value of the preset multiple to obtain a corresponding failure judgment value.
8. The device for determining the mechanical degeneracy of a high voltage circuit breaker according to claim 5, characterized in that said degeneracy percentage calculation unit comprises:
and the calculation subunit divides the decay value by the failure judgment value and multiplies the failure judgment value by one hundred percent to obtain the decay percentage corresponding to the discrete time point.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method for determining the mechanical degeneracy of a high voltage circuit breaker according to any of claims 1 to 4 are implemented by the processor when executing the program.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the method for determining the mechanical degeneracy of a high voltage circuit breaker according to any of the claims 1 to 4.
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| CN113723784B (en) * | 2021-08-19 | 2022-07-29 | 北京慧智神光科技有限公司 | Evaluation method and evaluation device for consistency of circuit breaker and electronic equipment |
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