CN115166449A - Zinc oxide valve plate performance evaluation method and system - Google Patents
Zinc oxide valve plate performance evaluation method and system Download PDFInfo
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- CN115166449A CN115166449A CN202210961484.0A CN202210961484A CN115166449A CN 115166449 A CN115166449 A CN 115166449A CN 202210961484 A CN202210961484 A CN 202210961484A CN 115166449 A CN115166449 A CN 115166449A
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 524
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 262
- 238000011156 evaluation Methods 0.000 title claims abstract description 86
- 230000032683 aging Effects 0.000 claims abstract description 155
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- 238000005457 optimization Methods 0.000 claims description 2
- 238000002922 simulated annealing Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 208000025274 Lightning injury Diseases 0.000 description 1
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1236—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of surge arresters
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Abstract
The embodiment of the invention discloses a zinc oxide valve plate performance evaluation method and a zinc oxide valve plate performance evaluation system, wherein the method comprises the following steps: aging treatment is carried out on the zinc oxide valve plates to obtain the aging days corresponding to each valve plate group, each valve plate group comprises a plurality of zinc oxide valve plates, the aging days of the zinc oxide valve plates of the same valve plate group are the same, the aging days of the zinc oxide valve plates of different valve plate groups are different, and the ambient temperature, the ambient humidity and the aging voltage of all the zinc oxide valve plates are the same during aging treatment; respectively applying impact high voltage to a plurality of zinc oxide valve plates in each valve plate group, processing the impact high voltage and the aging days through a preset rule to obtain impact current of each zinc oxide valve plate, and obtaining group impact current of each valve plate group based on all the impact current in each valve plate group; obtaining a characteristic distortion evaluation factor based on the group impact current of each valve group; and if the characteristic distortion evaluation factor is within the preset range, judging that the performance of a plurality of zinc oxide valve plates contained in the valve plate group is unqualified.
Description
Technical Field
The invention relates to the technical field of lightning arrester evaluation, in particular to a method and a system for evaluating performance of a zinc oxide valve plate.
Background
Lightning stroke failure has always been one of the biggest threats to power systems, and it has been reported that every year, a power system is damaged by lightning, and economic losses caused directly or indirectly reach billions. The lightning arrester is an important ring for ensuring the safe and stable operation of a power system, and is widely used in areas such as a power transmission line, a train, a transformer substation and the like due to excellent overvoltage protection capability. The zinc oxide lightning arrester has the characteristics of light weight, pollution resistance and the like, and is most widely applied. The valve sheet in the zinc oxide arrester is called as zinc oxide valve sheet.
The aging of the zinc oxide valve plate can be caused under the severe working environment, the performance of the zinc oxide valve plate is further influenced, and once the performance of the zinc oxide valve plate is greatly reduced, the operation of the lightning arrester can be disturbed.
Therefore, a performance evaluation method considering the aging degree of the zinc oxide valve sheet is required to improve the accuracy of the performance evaluation.
Disclosure of Invention
The embodiment of the invention provides a method and a system for evaluating the performance of a zinc oxide valve plate, which are used for evaluating the performance of the zinc oxide valve plate and improving the accuracy of evaluation.
In a first aspect, an embodiment of the present invention provides a method for evaluating performance of a zinc oxide valve plate, where the method includes:
aging treatment is carried out on the zinc oxide valve plates to obtain the aging days corresponding to each valve plate group, wherein each valve plate group comprises a plurality of zinc oxide valve plates, the aging days of the zinc oxide valve plates of the same valve plate group are the same, the aging days of the zinc oxide valve plates of different valve plate groups are different, and the environmental temperature, the environmental humidity and the aging voltage of all the zinc oxide valve plates are the same when the zinc oxide valve plates are aged;
respectively applying impact high voltage to a plurality of zinc oxide valve plates in each valve plate group, processing the impact high voltage and the aging days through a preset rule to obtain impact current of each zinc oxide valve plate, and obtaining group impact current of each valve plate group based on all the impact current in each valve plate group;
obtaining a characteristic distortion evaluation factor based on the group impact current of each valve group;
and if the characteristic distortion evaluation factor is within a preset range, judging that the performance of a plurality of zinc oxide valve plates contained in the valve plate group is unqualified.
In a second aspect, an embodiment of the present invention further provides a zinc oxide valve sheet performance evaluation system, where the system includes:
the test platform of zinc oxide valve block performance aassessment, test platform includes ageing day acquisition module, group impact current acquisition module, evaluation factor acquisition module and performance evaluation module, wherein:
the aging days acquisition module is used for performing aging treatment on the zinc oxide valve plates to obtain the aging days corresponding to each valve plate group, wherein each valve plate group comprises a plurality of zinc oxide valve plates, the aging days of the zinc oxide valve plates of the same valve plate group are the same, the aging days of the zinc oxide valve plates of different valve plate groups are different, and the environmental temperature, the environmental humidity and the aging voltage of all the zinc oxide valve plates are the same when the zinc oxide valve plates are subjected to aging treatment;
the group impact current acquisition module is used for respectively applying impact high voltage to the zinc oxide valve plates in each valve plate group, processing the impact high voltage and the aging days through a preset rule to obtain impact current of each zinc oxide valve plate, and obtaining group impact current of each valve plate group based on all the impact current in each valve plate group;
the evaluation factor acquisition module is used for obtaining a characteristic distortion evaluation factor based on the group impact current of each valve plate group;
and the performance evaluation module is used for judging that the performance of the zinc oxide valve plates contained in the valve plate group is unqualified if the characteristic distortion evaluation factor is within a preset range.
According to the technical scheme of the embodiment of the invention, aging days corresponding to each valve plate group are obtained by aging the zinc oxide valve plates. Each valve plate group comprises a plurality of zinc oxide valve plates, the aging degree of the zinc oxide valve plates of the same valve plate group is the same, and the aging degree of the zinc oxide valve plates of different valve plate groups is different. Respectively applying impact high voltage to the zinc oxide valve plates of each valve plate group, processing the impact high voltage and the aging days through a preset rule to obtain impact current of each zinc oxide valve plate, and obtaining group impact current of each valve plate group based on all impact currents of each valve plate group. A characteristic distortion evaluation factor is obtained based on the group impact current of each valve group. And if the characteristic distortion evaluation factor is within the preset range, judging that the performance of the zinc oxide valve plates in the valve plate group is unqualified. By the technical scheme of the embodiment of the invention, the performance of the zinc oxide valve plate is evaluated, and the evaluation accuracy is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a schematic flow chart of a method for evaluating the performance of a zinc oxide valve plate according to a first embodiment of the present invention;
FIG. 2 is a schematic flow chart of a zinc oxide valve sheet performance evaluation method according to a second embodiment of the present invention;
FIG. 3 is a schematic view of a test platform for evaluating the performance of a zinc oxide valve plate according to a second embodiment of the present invention;
fig. 4 is a schematic flow chart of a zinc oxide valve plate performance evaluation system in the third embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Before the technical solution of the embodiment of the present invention is explained, an application scenario of the embodiment of the present invention is exemplarily explained:
because the inside defect of arrester can lead to the arrester to lose the effect of protection electrical equipment, and the inside defect relies on the unable clear understanding of naked eye, and the defect of arrester includes ageing scheduling problem. Therefore, the method for evaluating the performance of the zinc oxide valve plate is provided, and is applied to evaluating the performance of the valve plate of the zinc oxide arrester. Because the factors causing the aging of the zinc oxide valve plate 12 are more, such as humidity, temperature, overvoltage and the like, in order to consider the influence of the aging degree on the performance of the zinc oxide valve plate 12, the embodiment of the invention fixes the parameters of humidity, temperature, voltage and the like, and only considers the influence of the aging duration on the aging degree, so that the zinc oxide valve plate 12 with different aging degrees can be obtained accurately, and the influence of different aging degrees on the performance of the zinc oxide valve plate can be known through experiments. The technical scheme of the embodiment of the invention has referential property, and the performance evaluation result of the embodiment of the invention can be referred when the performance of the zinc oxide valve plate 12 on site is evaluated. The evaluation of the valve plate performance of the zinc oxide arrester on site is facilitated for workers.
Example one
Fig. 1 is a schematic flow chart of a zinc oxide valve plate performance evaluation method provided in an embodiment of the present invention, where the method is applicable to a situation of evaluating performance of a zinc oxide valve plate 12, and the method can be implemented by a zinc oxide valve plate performance evaluation method system, and the system can be implemented in software and hardware.
As shown in fig. 1, the method for evaluating the performance of the zinc oxide valve plate in the embodiment of the present invention specifically includes the following steps:
s110, aging treatment is carried out on the zinc oxide valve plates 12 to obtain the aging days corresponding to each valve plate group.
Each valve plate group comprises a plurality of zinc oxide valve plates 12, the aging days of the zinc oxide valve plates 12 in the same valve plate group are the same, and the aging days of the zinc oxide valve plates 12 in different valve plate groups are different. Each valve plate group comprises a plurality of zinc oxide valve plates 12. Plural means two or more. The zinc oxide valve plate 12 refers to a zinc oxide lightning protection valve plate. When the aging treatment of the zinc oxide valve sheet 12 is performed, the ambient temperature, the ambient humidity, and the aging voltage of all the zinc oxide valve sheets 12 are the same. Thus, the aging degree of the zinc oxide valve sheet 12 subjected to the aging treatment is mainly the same as the aging days, and the longer the aging days are, the more serious the aging degree of the zinc oxide valve sheet 12 is.
Specifically, aging treatment is performed on the zinc oxide valve plates 12 to obtain the aging days corresponding to each valve plate group, so as to prepare for obtaining the subsequent impact current. The influence of different aging degrees on the obtained impact current can be obtained for the zinc oxide valve plates 12 with different aging degrees. It should be noted that each valve plate group is provided with a plurality of zinc oxide valve plates 12, and the aging days of the zinc oxide valve plates 12 in the same valve plate group are the same, that is, the aging degree is the same. Thus, when the group impact current of the valve plate group is obtained as described below, the group impact current can be obtained from the impact currents of the plurality of zinc oxide valve plates 12, and the accuracy of the group impact current is improved.
And S120, respectively applying impact high voltage to the zinc oxide valve plates 12 in each valve plate group, processing the impact high voltage and the aging days through a preset rule to obtain impact current of each zinc oxide valve plate 12, and obtaining group impact current of each valve plate group based on all the impact current in each valve plate group.
Wherein the high strike voltage is a high voltage generated to simulate a lightning strike in a field environment. The specific voltage amount for impacting the high voltage can be set according to actual conditions. The field environment refers to the working environment of the zinc oxide arrester. And the preset rule is used for processing the impact high voltage and the aging days to obtain the impact current.
Specifically, impact high voltage is applied to the zinc oxide valve plates 12 in each valve plate group respectively, the impact high voltage and the number of aging days are processed based on a preset rule to obtain impact current of each zinc oxide valve plate 12, an average value is obtained according to the impact current of each zinc oxide valve plate 12 of each valve plate group, and the average value is used as the group impact current of the valve plate group. By the acquisition method of the group impact current, the group impact current of each valve plate group is obtained.
On the basis of the embodiment of the invention, aging days corresponding to each valve plate group are obtained by aging the zinc oxide valve plates 12, and the aging days comprise: respectively carrying out electrothermal aging on each zinc oxide valve plate 12 in each valve plate group, and recording the aging days corresponding to each valve plate group; obtaining the impact current of each zinc oxide valve plate 12, which comprises the following steps: the impulse current of each zinc oxide valve plate 12 is obtained through an impulse current obtaining formula:
wherein, I 1 Is the impact current, T is the aging days, U is the impact high voltage, h is the error coefficient, and η is the integral variable.
Specifically, when the zinc oxide valve sheet 12 in the valve sheet group is subjected to aging treatment, the zinc oxide valve sheet 12 is placed in a test box, and other parameter information such as temperature, humidity, aging voltage and the like is kept the same, and only the time length is changed, so that the zinc oxide valve sheet 12 with different aging time lengths is obtained. And the number of days of aging for each zinc oxide sheet 12 was recorded. According to experimental data, the aging duration is taken as a unit of day, and the zinc oxide valve plates 12 with different aging degrees can be obtained more obviously. The zinc oxide valve plates 12 in the same valve plate group are subjected to electrothermal aging for the same days, and the zinc oxide valve plates 12 in different valve plate groups are subjected to electrothermal aging for different days, so that the zinc oxide valve plates 12 in the same valve plate group are aged in the same degree. The impact current of each zinc oxide valve plate 12 is obtained by an impact current obtaining formula, and then the group impact current is obtained according to a plurality of impact currents of each valve plate group.
On the basis of the embodiment of the invention, the impulse current of each zinc oxide valve plate 12 is obtained by an impulse current obtaining formula, which comprises the following steps: updating the impact current acquisition formula based on the optimal solution to obtain an updated formula; obtaining the impact current of each zinc oxide valve plate 12 based on an updating formula; and the optimal solution is to optimize the error coefficient through an iterative algorithm to obtain a new error coefficient. The iterative algorithm is an algorithm for optimizing an error coefficient.
Specifically, the error coefficient is optimized through an iterative algorithm to obtain a new error coefficient. The error coefficient is updated, so that the impact current acquisition formula is more accurate, and the impact current of the zinc oxide valve plate 12 obtained according to the impact current acquisition formula is more accurate.
On the basis of the embodiment of the present invention, before updating the impact current acquisition formula based on the optimal solution, the method further includes: step 1: generating an initial solution according to a preset algorithm, inputting the initial solution into a target function acquisition formula to obtain an initial target function, generating a disturbance solution according to the preset algorithm, inputting the disturbance solution into the target function acquisition formula to obtain a disturbance target function, performing difference calculation on the initial target function and the disturbance target function to obtain a difference value, updating the initial solution based on the difference value to obtain an optimized solution, adding 1 to the iteration number, generating a new disturbance solution according to the preset algorithm, and then executing the step 2; step 2: inputting the current disturbance solution into a target function obtaining formula to obtain a disturbance target function, performing difference calculation on the disturbance target function and a previous disturbance target function to obtain a new difference, updating the previous optimized solution based on the new difference, adding 1 to the iteration number, and then executing the step 3; and step 3: if the preset iteration times are reached, executing the step 4, if the preset iteration times are not reached, generating a new disturbance solution according to a preset algorithm, and returning to the step 2; and 4, step 4:if the terminal condition is met, taking the current optimized solution as the optimal solution, if the terminal condition is not met, generating a new disturbance solution according to a preset algorithm, and returning to the step 2; the objective function acquisition formula is:
wherein f (h) is an objective function, n represents the number of valve plate groups, I 1i Indicating the group impact current of the ith valve plate group, I 2i And h is a solution generated by a preset algorithm, the solution comprises an initial solution and a disturbance solution, and the group impact current measured value is an average value of impact current measured values of a plurality of zinc oxide valve plates included in the ith valve plate group.
Alternatively, the preset algorithm may be a simulated annealing algorithm or the like. The termination condition may be that the optimized solution has not changed for a first predetermined number of consecutive iterations. Alternatively, the optimization solution may be within a predetermined range. It is also possible that the optimized solutions are within the predetermined range of solutions in a second predetermined number of consecutive iterations. It should be noted that the optimal solution at this time may be the optimal solution obtained at the last iteration. When each zinc oxide valve plate 12 is applied with an impulse high voltage, an impulse current measured value is obtained, the impulse current measured values of each zinc oxide valve plate 12 of each valve plate group are subjected to average value calculation to obtain an average value, and the average value is used as the group impulse current measured value of the valve plate group.
Specifically, the impulse current is obtained according to an initial solution and an impulse current obtaining formula, and then the group impulse current is obtained. And obtaining the group impact current measured values according to the average value of the plurality of impact current measured values, further obtaining an initial target function corresponding to the initial solution according to the target function obtaining formula, similarly obtaining a disturbance target function corresponding to the disturbance solution, processing the two target functions, and updating the initial solution according to the processing result to obtain an optimized solution. Optionally, the updating mode may be to update the initial solution based on the perturbation solution, or update the initial solution based on the initial solution, that is, the initial solution does not need to be updated.
On the basis of the embodiment of the invention, the updating of the initial solution based on the difference value comprises the following steps: and if the difference value is greater than or equal to zero, replacing the initial solution with a disturbance solution, and if the difference value is less than zero, updating the initial solution according to a preset condition.
It should be noted that the preset condition may be a probability acceptance criterion.
Specifically, for example, the initial solution is h, and the perturbed solution is h 1 Obtaining a disturbance objective function f (h) 1 ) Difference Δ f = f (h) -f (h) from the initial objective function f (h) 1 ) If delta f is larger than or equal to 0, replacing the initial solution with a disturbance solution to obtain an optimized solution, otherwise, judging whether the initial solution is replaced with the disturbance solution according to a probability acceptance criterion to further obtain an updated solution.
Illustratively, the preset number of iterations is 2. Obtaining an initial solution A according to a simulated annealing algorithm, substituting the initial solution A into an objective function obtaining formula to obtain an initial objective function A1, obtaining a disturbance solution B according to the simulated annealing algorithm, and substituting the disturbance solution B into the objective function obtaining formula to obtain a disturbance objective function B1. And (3) performing difference on the disturbance target function B1 and the initial target function A1 to obtain a difference value, wherein the difference value is larger than or equal to zero, replacing the initial solution A with a disturbance solution B to obtain an optimized solution, namely the optimized solution is B, and adding 1 to the iteration number. And obtaining the next disturbance solution C according to the simulated annealing algorithm, obtaining a disturbance objective function C1 in the same way, subtracting the disturbance objective function C1 from the previous disturbance objective function B1 to obtain a difference value, wherein the difference value is smaller than zero, and judging not to replace the optimized solution according to a probability receiving criterion. And adding 1 to the iteration times, wherein the iteration times are equal to the preset iteration times, and judging that the optimized solution changes in the preset iteration times of two continuous times. And obtaining a disturbance solution D according to the simulated annealing algorithm, obtaining a disturbance target function D1 of the disturbance solution D, subtracting the current disturbance target function D1 from the previous disturbance target function C1 to obtain a difference value, wherein the difference value is smaller than zero, and judging not to replace the optimized solution according to a probability receiving criterion. And adding 1 to the iteration times, wherein the iteration times meet the preset iteration times, judging that the optimized solution does not change in the preset iteration times of two continuous times, taking the current optimized solution as the optimal solution, and stopping iteration.
And S130, obtaining a characteristic distortion evaluation factor based on the group impact current of each valve plate group.
The characteristic distortion evaluation factor is used for evaluating whether the performance of the zinc oxide valve plate 12 is qualified or not.
Specifically, a characteristic distortion evaluation factor corresponding to the valve plate group is obtained according to the group impact current, and whether the performance of the zinc oxide valve plate 12 in the valve plate group is qualified or not can be judged according to the characteristic distortion evaluation factor.
And S140, if the characteristic distortion evaluation factor is within the preset range, judging that the performance of the zinc oxide valve plates 12 contained in the valve plate group is unqualified.
The preset range may be set according to actual conditions, and in the embodiment of the present invention, the preset range is set to (0.75, + ∞).
Specifically, if the characteristic distortion evaluation factor is within (0.75, + ∞), the performance of the zinc oxide valve plate 12 within the valve plate group is determined to be not acceptable. Through the steps, whether the aging days and the performance of the zinc oxide valve plate 12 are qualified or not can be obtained, and further according to the technical scheme of the embodiment of the invention, the indirect relation between the aging days and the performance of the zinc oxide valve plate 12 can be obtained, so that the referential suggestion for evaluating the performance of the zinc oxide valve plate 12 in the field environment by workers is improved.
On the basis of the embodiment of the invention, a characteristic distortion evaluation factor is obtained based on the group impact current of each valve plate group, and the characteristic distortion evaluation factor comprises the following steps: substituting the group impact current into a characteristic distortion evaluation factor acquisition formula to obtain a characteristic distortion evaluation factor;
wherein beta is a characteristic distortion evaluation factor, I 2 Is the group rush current.
According to the technical scheme of the embodiment of the invention, aging days corresponding to each valve plate group are obtained by aging the zinc oxide valve plates 12, each valve plate group comprises a plurality of zinc oxide valve plates 12, the aging degrees of the zinc oxide valve plates 12 in the same valve plate group are the same, and the aging degrees of the zinc oxide valve plates 12 in different valve plate groups are different. Respectively applying impact high voltage to the zinc oxide valve plates 12 of each valve plate group, processing the impact high voltage and the aging days through a preset rule to obtain impact current of each zinc oxide valve plate 12, and obtaining group impact current of each valve plate group based on all impact currents of each valve plate group. A characteristic distortion evaluation factor is derived based on the group impact current for each of the valve plate groups. And if the characteristic distortion evaluation factor is within the preset range, judging that the performance of the zinc oxide valve plates 12 in the valve plate group is unqualified. By the technical scheme of the embodiment of the invention, the evaluation on the performance of the zinc oxide valve plate 12 is realized, and the evaluation accuracy is improved.
Example two
Fig. 2 is a schematic flow chart of a zinc oxide valve plate performance evaluation method provided in an embodiment of the present invention, and the embodiment of the present invention adds related technical features of early warning information on the basis of alternatives of the above embodiments. The technical terms identical or similar to those of the above embodiments will not be described again.
S210, aging treatment is carried out on the zinc oxide valve plates 12 to obtain the aging days corresponding to each valve plate group.
S220, respectively applying impact high voltage to the zinc oxide valve plates 12 in each valve plate group, processing the impact high voltage and the aging days through a preset rule to obtain impact current of each zinc oxide valve plate 12, and obtaining group impact current of each valve plate group based on all the impact current in each valve plate group.
And S230, obtaining a characteristic distortion evaluation factor based on the group impact current of each valve plate group.
S240, if the characteristic distortion evaluation factor is within the preset range, judging that the performance of the zinc oxide valve plates 12 contained in the valve plate group is unqualified.
And S250, sending out early warning information.
The early warning information comprises aging days, group impact current values, characteristic evaluation factors and recommendation information corresponding to the valve plate groups. The presentation form of the early warning information can be voice, characters and the like. For example, the warning information is broadcasted in a voice mode, or the warning information is displayed on a display interface in a text mode. The recommendation information comprises the contents of unqualified performance, recommendation of replacement and the like of the zinc oxide valve plate 12 in the valve plate group.
Specifically, under the condition that the performance of each zinc oxide valve plate 12 included in the valve plate group is judged to be unqualified, early warning information is sent out to prompt specific information and suggestion information of the valve plate group for workers. Optionally, the early warning information is saved, so that a worker can evaluate the zinc oxide valve sheet 12 in the field environment according to the early warning information.
According to the technical scheme of the embodiment of the invention, aging days corresponding to each valve plate group are obtained by aging zinc oxide valve plates 12, impact high voltage is respectively applied to a plurality of zinc oxide valve plates 12 in each valve plate group, the impact high voltage and the aging days are processed by a preset rule to obtain impact current of each zinc oxide valve plate 12, group impact current of each valve plate group is obtained based on all the impact current in each valve plate group, characteristic distortion evaluation factors are obtained based on the group impact current of each valve plate group, if the characteristic distortion evaluation factors are within a preset range, the performance of the plurality of zinc oxide valve plates 12 contained in the valve plate group is determined to be unqualified, and early warning information is sent, wherein the early warning information comprises the aging days, the impact current values, the characteristic evaluation factors and the performance of each zinc oxide valve plate 12 in the valve plate group which need to be replaced when the performance is unqualified. Through the technical scheme of the embodiment of the invention, the performance of the zinc oxide valve plate 12 is judged, and the early warning information is sent out under the condition that the judgment result is that the performance of the zinc oxide valve plate 12 is not qualified, so that the user experience is improved.
In another embodiment of the present invention, the method for evaluating the performance of the zinc oxide valve plate is implemented based on a test platform for evaluating the performance of the zinc oxide valve plate, referring to fig. 3, where the test platform includes a constant voltage power supply 2, a constant voltage power supply control console 3, a current sensor 5, an impulse high voltage generator control console 7, an impulse high voltage generator 8, a host 9, a single-pole double-throw switch 10, a thermostat 11, and a plurality of valve plate groups, and each valve plate group includes a plurality of zinc oxide valve plates 12; the constant temperature box 11 is used for placing a zinc oxide valve block 12, one end of the zinc oxide valve block 12 is connected with the movable end of the single-pole double-throw switch 10, the other end of the zinc oxide valve block 12 is connected with the output end of the constant voltage power supply 2 and one end of the current sensor 5, the output end of the constant voltage power supply 2 is connected with the first immovable end of the single-pole double-throw switch 10, the input end of the constant voltage power supply 2 is connected with one end of the constant voltage power supply control console 3, and the other end of the constant voltage power supply control console 3 is connected with the host 9; the output end of the impact high-voltage generator 8 is connected with the second fixed end of the single-pole double-throw switch 10, the input end of the impact high-voltage generator 8 is connected with one end of the impact high-voltage generator console 7, and the other end of the impact high-voltage generator 8 is connected with the host 9; the other end of the current sensor 5 is connected with a host 9. Respectively carrying out electrothermal ageing on each zinc oxide valve plate 12 in each valve plate group, wherein the electrothermal ageing comprises the following steps: under the condition that the movable end of the single-pole double-throw switch 10 is connected with the first fixed end, the constant-voltage power supply control console 3 is operated through the host machine 9, so that the constant-voltage power supply control console 3 controls the constant-voltage power supply 2 to apply aging voltage to the zinc oxide valve plates 12, and the electrothermal aging treatment of each zinc oxide valve plate 12 in each group is carried out; the zinc oxide valve plates 12 in each valve plate group are sequentially placed in the constant temperature box 11, and the temperature in the constant temperature box 11 is set to be a preset temperature.
Referring to fig. 3, the test platform may further include a test box 1, a constant temperature box 11 is disposed in the test box, the test platform may further include a grounding system 4, and the current sensor 5 is further connected to the grounding system 4; the test platform can also include a current data processing module 6, and the other end of the current sensor 5 is connected with a host computer 9 and comprises: the other end of the current sensor 5 is connected with one end of a current data processing module 6, and the other end of the current data processing module 6 is connected with a host 9;
specifically, when the test platform of the embodiment of the invention is used for aging the zinc oxide valve plates 12, each zinc oxide valve plate 12 can be treated, so that the precision of electrothermal aging is improved. One zinc oxide valve sheet 12 is placed in the incubator 11 for electrothermal aging at a time.
Illustratively, the temperature in the incubator 11 is set to 135 degrees centigrade, which totally includes 8 valve plate groups, the number of the zinc oxide valve plates 12 in each valve plate group is the same, and the number can be set according to actual conditions. Each valve plate group is subjected to electrothermal aging treatment for 0, 1, 2, 3, 4, 5, 6, 7 and 8 days, one valve plate group corresponds to one aging day, for example, the valve plate groups are numbered, each zinc oxide valve plate 12 included in the valve plate group 1 is subjected to electrothermal aging treatment for 0 day, that is, aging treatment is not performed, each zinc oxide valve plate 12 included in the valve plate group 2 is subjected to electrothermal aging treatment for 1 day, and thus 8 valve plate groups with different aging degrees are obtained.
On the basis of the embodiment of the invention, the method comprises the following steps of respectively applying impact high voltage to a plurality of zinc oxide valve plates 12 in each valve plate group, and processing the impact high voltage and the aging days through a preset rule to obtain the impact current of each zinc oxide valve plate 12, wherein the method comprises the following steps: aiming at a plurality of valve plate groups, under the condition that the movable end of a single-pole double-throw switch 10 is connected with a second immovable end, an impact high-voltage generator console 7 is operated through a host machine 9 to control an impact high-voltage generator 8 to apply impact high voltage to a zinc oxide valve plate 12, and current data of the zinc oxide valve plate 12 is obtained; each zinc oxide valve plate 12 in each valve plate group is sequentially placed in the constant temperature box 11. Acquiring current data through a current sensor 5 and transmitting the current data to a host machine 9 to obtain an impact current measured value of a zinc oxide valve plate 12; and obtaining the impact current of each zinc oxide valve plate 12 based on the impact current measured value and an impact current formula.
Specifically, each zinc oxide valve plate 12 is placed in the thermostat 11, the host 9 operates the impact high-voltage generator console 7 to control the impact high-voltage generator 8 to apply impact high voltage to the zinc oxide valve plates 12 to obtain current data of the zinc oxide valve plates 12, the current data is obtained through the current sensor 5 and uploaded to the host 9 to obtain an impact current measured value of the zinc oxide valve plates 12, an optimal solution is obtained based on the impact current measured value, and the optimal solution is substituted into an impact current obtaining formula to obtain the impact current of each zinc oxide valve plate 12. Optionally, the current data is acquired by the current sensor 5, transmitted to the current data processing module 6, and uploaded to the host 9 by the current data processing module 6.
EXAMPLE III
Fig. 4 is a schematic structural diagram of a zinc oxide valve plate performance evaluation system provided in an embodiment of the present invention, and the zinc oxide valve plate performance evaluation system provided in an embodiment of the present invention can execute a zinc oxide valve plate performance evaluation method provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method. The system comprises: the test platform for evaluating the performance of the zinc oxide valve plate comprises an aging day acquisition module 410, a group impact current acquisition module 420, an evaluation factor acquisition module 430 and a performance evaluation module 440; wherein:
the aging day acquisition module 410 is configured to acquire the aging days corresponding to each valve sheet group by performing aging processing on the zinc oxide valve sheets 12, where each valve sheet group includes a plurality of zinc oxide valve sheets 12, the aging days of the zinc oxide valve sheets 12 of the same valve sheet group are the same, the aging days of the zinc oxide valve sheets 12 of different valve sheet groups are different, and when the aging processing of the zinc oxide valve sheets 12 is performed, the ambient temperatures, the ambient humidities, and the aging voltages of all the zinc oxide valve sheets 12 are the same; the group impact current obtaining module 420 is configured to apply impact high voltages to the zinc oxide valve plates 12 in each valve plate group, process the impact high voltages and the aging days according to preset rules to obtain impact currents of the zinc oxide valve plates 12, and obtain group impact currents of the valve plate groups based on all the impact currents in each valve plate group; the evaluation factor obtaining module 430 is configured to obtain a characteristic distortion evaluation factor based on the group impact current of each valve plate group; and the performance evaluation module 440 is configured to determine that the performance of the plurality of zinc oxide valve plates 12 included in the valve plate group is not qualified if the characteristic distortion evaluation factor is within a preset range.
Further, in this embodiment of the present invention, the group inrush current obtaining module 420 is further configured to: respectively carrying out electrothermal aging on each zinc oxide valve plate 12 in each valve plate group, and recording the aging days corresponding to each valve plate group; obtaining the impact current of each zinc oxide valve plate 12, which comprises the following steps: the impact current of each zinc oxide valve plate 12 is obtained through an impact current obtaining formula:
wherein, I 1 Is the impact current, T is the aging days, U is the impact high voltage, h is the error coefficient, eta is the integralAnd (4) variable quantity.
Further, in this embodiment of the present invention, the aging day acquiring module 410 is further configured to: updating the impact current acquisition formula based on the optimal solution to obtain an updated formula; obtaining the impact current of each zinc oxide valve plate 12 based on an updated formula; the optimal solution is to optimize the error coefficient through an iterative algorithm to obtain a new error coefficient.
Further, in this embodiment of the present invention, the aging day acquiring module 410 is further configured to: step 1: generating an initial solution according to a preset algorithm, inputting the initial solution into a target function acquisition formula to obtain an initial target function, generating a disturbance solution according to the preset algorithm, inputting the disturbance solution into the target function acquisition formula to obtain a disturbance target function, performing difference calculation on the initial target function and the disturbance target function to obtain a difference value, updating the initial solution based on the difference value to obtain an optimized solution, adding 1 to the iteration number, generating a new disturbance solution according to the preset algorithm, and then executing the step 2; step 2: inputting the current disturbance solution into a target function obtaining formula to obtain a disturbance target function, performing difference calculation on the disturbance target function and a previous disturbance target function to obtain a new difference, updating the previous optimized solution based on the new difference, adding 1 to the iteration number, and then executing the step 3; and step 3: if the preset iteration times are reached, executing the step 4, if the preset iteration times are not reached, generating a new disturbance solution according to a preset algorithm, and returning to the step 2; and 4, step 4: if the terminal condition is met, taking the current optimized solution as the optimal solution, if the terminal condition is not met, generating a new disturbance solution according to a preset algorithm, and returning to the step 2; the objective function acquisition formula is:
wherein f (h) is an objective function, n represents the number of valve plate groups, I 1i Indicating the group impact current of the ith valve plate group, I 2i H is a solution generated by a preset algorithm, the solution comprises an initial solution and a disturbance solution, and the measured value of the group impact current refers to the level of the measured values of the impact currents of a plurality of zinc oxide valve plates included in the ith valve plate groupAnd (4) average value.
Further, in this embodiment of the present invention, the aging day acquiring module 410 is further configured to: and obtaining a difference value between the disturbance objective function and the initial objective function, if the difference value is greater than or equal to zero, replacing the initial solution with the disturbance solution to obtain an updated solution, and if the difference value is less than zero, updating the initial solution according to a preset condition.
Further, in this embodiment of the present invention, the evaluation factor obtaining module 430 is further configured to: substituting the group impact current into a characteristic distortion evaluation factor acquisition formula to obtain a characteristic distortion evaluation factor;
wherein beta is a characteristic distortion evaluation factor, I 2 Is the group rush current.
Further, in the embodiment of the present invention, the system further includes:
and the early warning module is used for sending out early warning information, and the early warning information comprises the aging days, the group impact current value, the characteristic evaluation factor and the recommendation information corresponding to the valve plate group.
Further, in an embodiment of the present invention, the test platform includes: the device comprises a constant voltage power supply 2, a constant voltage power supply control console 3, a current sensor 5, an impact high voltage generator control console 7, an impact high voltage generator 8, a host machine 9, a single-pole double-throw switch 10, a thermostat 11 and a plurality of valve plate groups, wherein each valve plate group comprises a plurality of zinc oxide valve plates 12; the constant temperature box 11 is used for placing a zinc oxide valve block 12, one end of the zinc oxide valve block 12 is connected with the movable end of the single-pole double-throw switch 10, the other end of the zinc oxide valve block 12 is connected with the output end of the constant voltage power supply 2 and one end of the current sensor 5, the output end of the constant voltage power supply 2 is connected with the first immovable end of the single-pole double-throw switch 10, the input end of the constant voltage power supply 2 is connected with one end of the constant voltage power supply control console 3, and the other end of the constant voltage power supply control console 3 is connected with the host 9; the output end of the impact high-voltage generator 8 is connected with the second fixed end of the single-pole double-throw switch 10, the input end of the impact high-voltage generator 8 is connected with one end of the impact high-voltage generator console 7, and the other end of the impact high-voltage generator 8 is connected with the host 9; the current sensor 5 is connected with the host machine 9 to respectively carry out electrothermal aging on each zinc oxide valve plate 12 in each valve plate group, and the electrothermal aging comprises the following steps: under the condition that the movable end of the single-pole double-throw switch 10 is connected with the first fixed end, the constant-voltage power supply control console 3 is operated through the host machine 9, so that the constant-voltage power supply control console 3 controls the constant-voltage power supply 2 to apply aging voltage to the zinc oxide valve plates 12, and the electrothermal aging treatment of each zinc oxide valve plate 12 in each group is carried out; the zinc oxide valve plates 12 in each valve plate group are sequentially placed in the constant temperature box 11, and the temperature in the constant temperature box 11 is set to be a preset temperature.
Further, in the embodiment of the present invention, the group impact current obtaining module 420 is further configured to, for a plurality of valve groups, operate the impact high voltage generator console 7 through the host 9 under the condition that the moving end of the single-pole double-throw switch 10 is connected to the second stationary end, so as to control the impact high voltage generator 8 to apply impact high voltage to the zinc oxide valve plate 12, and obtain current data of the zinc oxide valve plate 12; each zinc oxide valve plate 12 in each valve plate group is sequentially placed in a constant temperature box 11; acquiring current data through the current sensor 5 and transmitting the current data to the host machine 9 to obtain an actual impact current value of the zinc oxide valve plate 12; and obtaining the impact current of each zinc oxide valve plate 12 based on the impact current measured value, the impact high voltage, the aging days and the impact current formula.
The technical scheme of the embodiment of the invention comprises a test platform for evaluating the performance of the zinc oxide valve plate, wherein the test platform comprises an aging day acquisition module 410 for carrying out aging treatment on the zinc oxide valve plate 12 to obtain the aging days corresponding to each valve plate group, each valve plate group comprises a plurality of zinc oxide valve plates 12, the aging days of the zinc oxide valve plates 12 of the same valve plate group are the same, the aging days of the zinc oxide valve plates 12 of different valve plate groups are different, and the environmental temperature, the environmental humidity and the aging voltage of all the zinc oxide valve plates 12 are the same when the aging treatment of the zinc oxide valve plates 12 is carried out; the method comprises the steps that an impact high voltage is applied to a plurality of zinc oxide valve plates 12 in each valve plate group through a group impact current acquisition module, the impact high voltage and the number of aging days are processed through preset rules to obtain impact currents of the zinc oxide valve plates 12, the group impact currents of the valve plate groups are obtained based on all the impact currents of the valve plate groups, an evaluation factor acquisition module obtains characteristic distortion evaluation factors based on the group impact currents of the valve plate groups, a performance evaluation module is used for judging whether the performance of the zinc oxide valve plates 12 contained in the valve plate groups is qualified or not according to whether the characteristic distortion evaluation factors are within a preset range, and when the characteristic distortion evaluation factors are within the preset range, the performance of the zinc oxide valve plates 12 in the valve plate groups is judged to be unqualified. Through the technical scheme of the embodiment of the invention, the performance of the zinc oxide valve plate 12 is evaluated, and the evaluation accuracy is improved.
It should be noted that, the modules included in the system are merely divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be implemented; in addition, specific names of the functional modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the embodiment of the present invention.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (10)
1. A method for evaluating the performance of a zinc oxide valve plate is characterized by comprising the following steps:
aging treatment is carried out on the zinc oxide valve plates to obtain the aging days corresponding to each valve plate group, wherein each valve plate group comprises a plurality of zinc oxide valve plates, the aging days of the zinc oxide valve plates of the same valve plate group are the same, the aging days of the zinc oxide valve plates of different valve plate groups are different, and when the aging treatment is carried out on the zinc oxide valve plates, the environmental temperature, the environmental humidity and the aging voltage of all the zinc oxide valve plates are the same;
respectively applying impact high voltage to a plurality of zinc oxide valve plates in each valve plate group, processing the impact high voltage and the aging days through a preset rule to obtain impact current of each zinc oxide valve plate, and obtaining group impact current of each valve plate group based on all the impact current in each valve plate group;
obtaining a characteristic distortion evaluation factor based on the group impact current of each valve group;
and if the characteristic distortion evaluation factor is within a preset range, judging that the performance of a plurality of zinc oxide valve plates contained in the valve plate group is unqualified.
2. The method for evaluating the performance of the zinc oxide valve plate according to claim 1, wherein the obtaining of the aging days corresponding to each valve plate group by aging the zinc oxide valve plate comprises:
respectively carrying out electrothermal aging on each zinc oxide valve plate in each valve plate group, and recording the aging days corresponding to each valve plate group;
the step of obtaining the impact current of each zinc oxide valve plate comprises the following steps:
obtaining the impulse current of each zinc oxide valve plate through an impulse current obtaining formula:
wherein, I 1 Is the impact current, T is the aging days, U is the impact high voltage, h is the error coefficient, and η is the integral variable.
3. The method for evaluating the performance of the zinc oxide valve plate according to claim 2, wherein the obtaining of the surge current of each zinc oxide valve plate through a surge current obtaining formula comprises:
updating the impact current acquisition formula based on the optimal solution to obtain an updated formula;
obtaining the impact current of each zinc oxide valve plate based on the updating formula; and optimizing the error coefficient by an iterative algorithm to obtain a new error coefficient.
4. The method for evaluating the performance of the zinc oxide valve sheet according to claim 3, before updating the rush current obtaining formula based on the optimal solution, further comprising:
step 1: generating an initial solution according to a preset algorithm, inputting the initial solution into a target function acquisition formula to obtain an initial target function, generating a disturbance solution according to the preset algorithm, inputting the disturbance solution into the target function acquisition formula to obtain a disturbance target function, performing difference calculation on the initial target function and the disturbance target function to obtain a difference value, updating the initial solution based on the difference value to obtain an optimized solution, adding 1 to the iteration number, generating a new disturbance solution according to the preset algorithm, and then executing a step 2;
and 2, step: inputting the current disturbance solution into an objective function acquisition formula to obtain a disturbance objective function, performing difference calculation on the disturbance objective function and a previous disturbance objective function to obtain a new difference, updating a previous optimization solution based on the new difference, adding 1 to the iteration number, and then executing the step 3;
and step 3: if the preset iteration times are reached, executing the step 4, if the preset iteration times are not reached, generating a new disturbance solution according to the preset algorithm, and returning to the step 2;
and 4, step 4: if the terminal condition is met, taking the current optimized solution as the optimal solution, if the terminal condition is not met, generating a new disturbance solution according to the preset algorithm, and returning to the step 2;
the objective function obtaining formula is as follows:
wherein f (h) is an objective function, n represents the number of valve plate groups, I 1i Indicating the group impact current of the ith valve plate group, I 2i And h is a solution generated by a preset algorithm, wherein the solution comprises an initial solution and a disturbance solution, and the group impact current measured value is an average value of impact current measured values of a plurality of zinc oxide valve plates included in the ith valve plate group.
5. The method for evaluating the performance of the zinc oxide valve sheet according to claim 4, wherein the updating the initial solution based on the difference value comprises:
and if the difference value is greater than or equal to zero, replacing the initial solution with the disturbance solution to obtain an optimized solution, and if the difference value is less than zero, updating the initial solution according to a preset condition.
6. The method for evaluating the performance of the zinc oxide valve plate according to any one of claims 3 and 4, wherein the obtaining of the characteristic distortion evaluation factor based on the group impact current of each valve plate group comprises:
substituting the group impact current into a characteristic distortion evaluation factor acquisition formula to obtain a characteristic distortion evaluation factor;
wherein beta is a characteristic distortion evaluation factor, I 2 Is the group rush current.
7. The method for evaluating the performance of the zinc oxide valve plate according to claim 1, wherein after the step of judging that the performance of the plurality of zinc oxide valve plates included in the valve plate group is unqualified if the characteristic distortion evaluation factor is within a preset range, the method comprises the following steps:
and sending early warning information, wherein the early warning information comprises the aging days, the group impact current value, the characteristic evaluation factor and recommendation information corresponding to the valve plate group.
8. The method for evaluating the performance of the zinc oxide valve plate according to claim 4, wherein the method is implemented on a test platform based on the evaluation of the performance of the zinc oxide valve plate, and the test platform comprises:
the device comprises a constant voltage power supply, a constant voltage power supply control console, a current sensor, an impact high voltage generator control console, an impact high voltage generator, a host, a single-pole double-throw switch, a thermostat and a plurality of valve plate groups, wherein each valve plate group comprises a plurality of zinc oxide valve plates;
the thermostat is used for placing the zinc oxide valve block, one end of the zinc oxide valve block is connected with the movable end of the single-pole double-throw switch, and the other end of the zinc oxide valve block is connected with the output end of the constant voltage power supply and one end of the current sensor;
the output end of the constant voltage power supply is connected with the first fixed end of the single-pole double-throw switch, the input end of the constant voltage power supply is connected with one end of the constant voltage power supply control console, and the other end of the constant voltage power supply control console is connected with the host;
the output end of the impact high-voltage generator is connected with the second fixed end of the single-pole double-throw switch, the input end of the impact high-voltage generator is connected with one end of a console of the impact high-voltage generator, and the other end of the impact high-voltage generator is connected with the host;
the current sensor is connected with the host;
the electrothermal aging is carried out on each zinc oxide valve plate in each valve plate group respectively, and the electrothermal aging method comprises the following steps:
under the condition that the movable end of the single-pole double-throw switch is connected with the first fixed end, a constant voltage power supply control console is operated through a host machine, so that the constant voltage power supply control console controls a constant voltage power supply to apply an aging voltage to the zinc oxide valve plates, and the electrothermal aging treatment of each zinc oxide valve plate in each group is carried out; the zinc oxide valve plates in each valve plate group are sequentially placed in a constant temperature box, and the temperature in the constant temperature box is set to be a preset temperature.
9. The method for evaluating the performance of the zinc oxide valve sheet according to claim 8, wherein the step of applying impact high voltage to the plurality of zinc oxide valve sheets in each valve sheet group respectively and processing the impact high voltage and the aging days according to a preset rule to obtain the impact current of each zinc oxide valve sheet comprises the following steps:
aiming at a plurality of valve plate groups, under the condition that the movable end of the single-pole double-throw switch is connected with the second immovable end, operating an impact high-voltage generator console through the host machine to control an impact high-voltage generator to apply impact high voltage to the zinc oxide valve plate so as to obtain current data of the zinc oxide valve plate; each zinc oxide valve plate in each valve plate group is sequentially placed in a constant temperature box;
acquiring the current data through a current sensor and transmitting the current data to a host to obtain an impact current measured value of the zinc oxide valve plate;
and obtaining the impact current of each zinc oxide valve plate based on the impact current measured value, the impact high voltage, the aging days and an impact current formula.
10. A zinc oxide valve plate performance evaluation system is characterized by comprising:
test platform of zinc oxide valve block performance aassessment, test platform obtains module, group impulse current and obtains module, evaluation factor and performance evaluation module including ageing days, wherein:
the aging days acquisition module is used for performing aging treatment on the zinc oxide valve plates to obtain the aging days corresponding to each valve plate group, wherein each valve plate group comprises a plurality of zinc oxide valve plates, the aging days of the zinc oxide valve plates of the same valve plate group are the same, the aging days of the zinc oxide valve plates of different valve plate groups are different, and the environmental temperature, the environmental humidity and the aging voltage of all the zinc oxide valve plates are the same when the zinc oxide valve plates are subjected to aging treatment;
the group impact current acquisition module is used for respectively applying impact high voltage to the zinc oxide valve plates in each valve plate group, processing the impact high voltage and the aging days through a preset rule to obtain impact current of each zinc oxide valve plate, and obtaining group impact current of each valve plate group based on all the impact current in each valve plate group;
the evaluation factor acquisition module is used for obtaining a characteristic distortion evaluation factor based on the group impact current of each valve plate group;
and the performance evaluation module is used for judging that the performance of the zinc oxide valve plates contained in the valve plate group is unqualified if the characteristic distortion evaluation factor is within a preset range.
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