CN115473195A - Lightning arrester parameter determination method, device, equipment, storage medium and program product - Google Patents
Lightning arrester parameter determination method, device, equipment, storage medium and program product Download PDFInfo
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- CN115473195A CN115473195A CN202211223006.6A CN202211223006A CN115473195A CN 115473195 A CN115473195 A CN 115473195A CN 202211223006 A CN202211223006 A CN 202211223006A CN 115473195 A CN115473195 A CN 115473195A
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Abstract
The application relates to a lightning arrester parameter determination method, a lightning arrester parameter determination device, a computer device, a storage medium and a computer program product. The method comprises the following steps: acquiring a parameter limiting condition of the lightning arrester with parameters to be determined; the parameter limiting conditions include: the operating surge protection level voltage of the arrester and the surge duration of the arrester; obtaining the overvoltage multiple of the arrester based on the impact duration of the arrester and the corresponding relation between the preset overvoltage multiple and the impact duration, and obtaining the reference voltage of the arrester by using the overvoltage multiple of the arrester and the operation impact protection horizontal voltage of the arrester; and determining the parameters of the lightning arrester according to the reference voltage of the lightning arrester. By adopting the method, the parameters of the lightning arrester can be accurately determined.
Description
Technical Field
The present application relates to the field of lightning arresters, and in particular, to a method, an apparatus, a computer device, a storage medium, and a computer program product for determining parameters of a lightning arrester.
Background
With the development of the technical field of lightning arresters, a high-capacity direct current lightning arrester parameter determination technology appears, which equivalently simulates the working state of a high-capacity direct current lightning arrester by using 2 milliseconds of square waves and determines parameters to be configured of the lightning arrester based on the lightning arrester operation information in the working state.
According to the parameter configuration method for the large-capacity direct current arrester with the parameters configured by the technical scheme, the fault rate is higher than the normal level when the large-capacity direct current arrester is actually operated, analysis finds that the operation condition of the large-capacity direct current arrester is obviously different from that of a general direct current arrester, no obvious operation voltage exists when the large-capacity direct current arrester is operated, 50-200 milliseconds of long-wave impact current borne by the large-capacity direct current arrester when the large-capacity direct current arrester is operated is obviously different from 2 milliseconds of square-wave impact current, and therefore the parameters configured by the large-capacity direct current arrester can be inaccurate by using the traditional 2 milliseconds of square waves to equivalently simulate the operation state of the large-capacity direct current arrester.
Disclosure of Invention
In view of the above, there is a need to provide a lightning arrester parameter determining method, apparatus, computer device, computer readable storage medium and computer program product capable of accurately determining large-capacity direct current lightning arrester parameters.
In a first aspect, the application provides a lightning arrester parameter determination method. The method comprises the following steps:
acquiring a parameter limiting condition of the lightning arrester with parameters to be determined; the parameter definition conditions include: an operational surge protection level voltage of the arrester and a surge duration of the arrester;
obtaining the overvoltage multiple of the arrester based on the impact duration of the arrester and the corresponding relation between the preset overvoltage multiple and the impact duration, and obtaining the reference voltage of the arrester by using the overvoltage multiple of the arrester and the operation impact protection horizontal voltage of the arrester;
and determining the parameters of the lightning arrester according to the reference voltage of the lightning arrester.
In one embodiment, the parameter defining condition further includes: the matching current of the lightning arrester; the lightning arrester parameters of the lightning arrester comprise the number of resistance sheets of a single resistance sheet column of the lightning arrester and the number of resistance sheet columns of the lightning arrester; the determining the arrester parameter of the arrester according to the reference voltage of the arrester comprises: obtaining the number of resistance cards of a single resistance card column of the lightning arrester based on the reference voltage of the lightning arrester; obtaining the number of resistor disc columns of the lightning arrester based on the overvoltage multiple and the matching current of the lightning arrester; the lightning arrester comprises a plurality of parallel resistance card columns.
In one embodiment, the single resistive sheet column comprises a plurality of resistive sheets connected in series; the obtaining of the number of the resistor discs of a single resistor disc column of the arrester based on the reference voltage of the arrester comprises: obtaining a reference voltage of a single resistance card obtained in advance, and obtaining a result of dividing the reference voltage of the lightning arrester by the reference voltage of the single resistance card; and obtaining the number of the resistor discs of the single resistor disc column of the lightning arrester based on the division result.
In one embodiment, the obtaining the number of the resistive patch columns of the arrester based on the overvoltage multiple and the matching current of the arrester includes: obtaining a corrected overvoltage multiple based on the overvoltage multiple and a pre-obtained overvoltage multiple correction coefficient; the corrected overvoltage multiple is used for representing the overvoltage multiple of the single resistor disc; obtaining the operation impact protection level voltage of the single resistance card based on the corrected overvoltage multiple and the reference voltage of the single resistance card; obtaining the matching current of the single resistance card through a resistance card volt-ampere curve of the single resistance card obtained in advance based on the operation impact protection horizontal voltage of the single resistance card; the matching current of the single resistor disc is also the matching current of the single resistor disc column; and obtaining the number of the resistor disc columns of the lightning arrester based on the matching current of the single resistor disc and the matching current of the lightning arrester.
In one embodiment, after obtaining the number of the resistor disc columns of the lightning arrester, the method further includes: obtaining the number of the resistor discs of the lightning arrester based on the number of the resistor discs of the single resistor disc column and the number of the resistor disc columns of the lightning arrester; obtaining the energy absorption capacity of the lightning arrester based on the energy absorption capacity of the single resistance card obtained in advance and the number of the resistance cards; if the energy absorption capacity of the lightning arrester is larger than a preset value, the energy absorption capacity of the lightning arrester passes through energy detection; and if the energy absorption capacity of the lightning arrester is smaller than or equal to a preset value, recalculating the number of the resistance cards of a single resistance card column of the lightning arrester and the number of the resistance card columns of the lightning arrester.
In one embodiment, if the energy absorption capability of the lightning arrester is greater than a preset value, after the energy absorption capability of the lightning arrester passes through energy detection, the method further includes: obtaining the number of the spare resistance chip columns of the lightning arrester based on the number of the resistance chip columns of the lightning arrester and a preset proportionality coefficient of the spare resistance chip columns; and obtaining the final number of the resistor disc columns of the lightning arrester based on the number of the standby resistor disc columns of the lightning arrester and the number of the resistor disc columns of the lightning arrester.
In a second aspect, the application also provides a lightning arrester parameter determination device. The device comprises:
the limiting condition acquisition module is used for acquiring the parameter limiting condition of the lightning arrester with the parameter to be determined; the parameter defining conditions include: an operational surge protection level voltage of the arrester and a surge duration of the arrester;
the reference voltage acquisition module is used for obtaining the overvoltage multiple of the lightning arrester based on the impact duration of the lightning arrester and the corresponding relation between the preset overvoltage multiple and the impact duration, and obtaining the reference voltage of the lightning arrester by using the overvoltage multiple of the lightning arrester and the operation impact protection horizontal voltage of the lightning arrester;
and the lightning arrester parameter acquisition module is used for determining the lightning arrester parameters of the lightning arrester according to the reference voltage of the lightning arrester.
In a third aspect, the present application also provides a computer device. The computer device comprises a memory storing a computer program and a processor implementing the following steps when executing the computer program:
acquiring a parameter limiting condition of the lightning arrester with parameters to be determined; the parameter defining conditions include: an operational surge protection level voltage of the arrester and a surge duration of the arrester;
obtaining the overvoltage multiple of the arrester based on the impact duration of the arrester and the corresponding relation between the preset overvoltage multiple and the impact duration, and obtaining the reference voltage of the arrester by using the overvoltage multiple of the arrester and the operation impact protection horizontal voltage of the arrester;
and determining the lightning arrester parameters of the lightning arrester according to the reference voltage of the lightning arrester.
In a fourth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
acquiring a parameter limiting condition of the lightning arrester with parameters to be determined; the parameter defining conditions include: an operational surge protection level voltage of the surge arrester and a surge duration of the surge arrester;
obtaining the overvoltage multiple of the arrester based on the impact duration of the arrester and the corresponding relation between the preset overvoltage multiple and the impact duration, and obtaining the reference voltage of the arrester by using the overvoltage multiple of the arrester and the operation impact protection horizontal voltage of the arrester;
and determining the parameters of the lightning arrester according to the reference voltage of the lightning arrester.
In a fifth aspect, the present application further provides a computer program product. The computer program product comprising a computer program which when executed by a processor performs the steps of:
acquiring a parameter limiting condition of the lightning arrester with parameters to be determined; the parameter defining conditions include: an operational surge protection level voltage of the arrester and a surge duration of the arrester;
obtaining the overvoltage multiple of the arrester based on the impact duration of the arrester and the corresponding relation between the preset overvoltage multiple and the impact duration, and obtaining the reference voltage of the arrester by using the overvoltage multiple of the arrester and the operation impact protection horizontal voltage of the arrester;
and determining the lightning arrester parameters of the lightning arrester according to the reference voltage of the lightning arrester.
According to the lightning arrester parameter determination method, the lightning arrester parameter determination device, the computer equipment, the storage medium and the computer program product, the parameter limiting condition of the lightning arrester with the parameter to be determined is obtained; the parameter limiting conditions include: the operation impact protection horizontal voltage of the arrester and the impact duration of the arrester; obtaining the overvoltage multiple of the arrester based on the impact duration of the arrester and the corresponding relation between the preset overvoltage multiple and the impact duration, and obtaining the reference voltage of the arrester by using the overvoltage multiple of the arrester and the operation impact protection horizontal voltage of the arrester; and determining the parameters of the lightning arrester according to the reference voltage of the lightning arrester. According to the method and the device, the overvoltage multiple of the lightning arrester is obtained through the preset corresponding relation between the overvoltage multiple and the impact duration, the reference voltage of the lightning arrester is further obtained, and the lightning arrester parameters of the lightning arrester can be accurately determined according to the reference voltage of the lightning arrester.
Drawings
Fig. 1 is a schematic flow chart of a lightning arrester parameter determination method according to an embodiment;
FIG. 2 is a schematic flow chart of the process for determining parameters of the lightning arrester according to one embodiment;
FIG. 3 is a schematic diagram of a process for determining the number of resistive patches for a single resistive patch column in one embodiment;
FIG. 4 is a schematic diagram of a process for determining the number of resistive patch columns in one embodiment;
fig. 5 is a schematic flow chart of determining parameters of a high-capacity lightning arrester according to an embodiment;
fig. 6 is a block diagram showing the configuration of the arrester parameter determination device in one embodiment;
FIG. 7 is a diagram of the internal structure of a computer device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be noted that the term "first \ second" referred to in the embodiments of the present invention only distinguishes similar objects, and does not represent a specific ordering for the objects, and it should be understood that "first \ second" may exchange a specific order or sequence when allowed. It should be understood that "first \ second" distinguishing objects may be interchanged under appropriate circumstances such that the embodiments of the invention described herein may be practiced in sequences other than those illustrated or described herein.
In an embodiment, as shown in fig. 1, a method for determining parameters of an arrester is provided, and this embodiment is illustrated by applying the method to a terminal, it is to be understood that the method may also be applied to a server, and may also be applied to a system including the terminal and the server, and is implemented by interaction between the terminal and the server. In this embodiment, the method includes the steps of:
s101, acquiring a parameter limiting condition of the lightning arrester with parameters to be determined; the parameter limiting conditions include: the operation of the arrester impacts the protection level voltage and the impact duration of the arrester.
The lightning arrester with the parameters to be determined is a high-capacity direct current lightning arrester with the parameters to be determined, no significant operating voltage exists when the high-capacity direct current lightning arrester operates, the fact that the ratio of the actual continuous operating voltage of the lightning arrester to the direct current reference voltage does not exceed 50% means that the high-capacity direct current lightning arrester bears 50-200ms of long-wave impact current when the high-capacity direct current lightning arrester operates. The parameter limiting condition is a limiting condition of a parameter to be determined, the parameter limiting condition is used for limiting and calculating the parameter of the lightning arrester, and the parameter limiting condition is obtained by electromagnetic transient software and comprises the following steps: the lightning arrester protection device comprises a continuous voltage, an operation impact protection level voltage, a coordination current and an impact duration, wherein the continuous voltage is the maximum continuous voltage which can be permanently applied between the lightning arrester terminals, the operation impact protection level voltage is the maximum allowable peak voltage on the operation impact protection device terminal under a specified condition, the coordination current is the corresponding current under the operation impact protection level voltage, and the impact duration is the duration of the voltage which is increased from the normal voltage to the peak voltage and then returned to the normal voltage when the lightning arrester receives current impact.
Specifically, parameter limiting conditions of the lightning arrester with parameters to be determined are obtained through electromagnetic transient software.
And S102, obtaining the overvoltage multiple of the arrester based on the impact duration of the arrester and the corresponding relation between the preset overvoltage multiple and the impact duration, and obtaining the reference voltage of the arrester by using the overvoltage multiple of the arrester and the operation impact protection horizontal voltage of the arrester.
The corresponding relation between the overvoltage multiple and the impact duration is that overvoltage-time characteristic curves of part of lightning arrester manufacturers under different impact wavelengths are extracted through long-wave impact test results, factors such as test measurement deviation and formula difference of different manufacturers are comprehensively considered, and a calculation formula of the overvoltage multiple is fitted. The reference voltage is an average value of the direct current voltage of the arrester measured when the arrester passes through the direct current reference current, and the overvoltage multiple refers to a ratio of the operating surge protection level voltage of the arrester to the reference voltage.
Specifically, the correspondence relationship between the overvoltage multiple and the surge duration is as follows:
k＝0.14e -T/76.32 +1.22；
and dividing the operation impact protection horizontal voltage of the lightning arrester by the overvoltage multiple to obtain the reference voltage of the lightning arrester, wherein k is the overvoltage multiple, T is the impact duration, and e is a natural constant. For example, when the surge duration of the arrester is 200ms and the operating surge protection level voltage of the arrester is 87.9kV, the overvoltage multiple k =1.23 can be obtained from the correspondence relationship between the overvoltage multiple and the surge duration, and the reference voltage of the arrester should be 87.9/1.23=71.46kv.
And S103, determining lightning arrester parameters of the lightning arrester according to the reference voltage of the lightning arrester.
The parameters of the lightning arrester are parameters which are determined by the configuration of the lightning arrester, and the parameters of the lightning arrester can be the number of the resistance cards of a single resistance card column of the lightning arrester and the number of the resistance card columns of the lightning arrester.
Specifically, the parameters of the lightning arrester can be calculated according to the reference voltage of the lightning arrester and the parameter limiting conditions of the lightning arrester.
In the lightning arrester parameter determining method, the parameter limiting condition of the lightning arrester with the parameter to be determined is obtained; the parameter limiting conditions include: the operation impact protection horizontal voltage of the arrester and the impact duration of the arrester; obtaining the overvoltage multiple of the arrester based on the impact duration of the arrester and the corresponding relation between the preset overvoltage multiple and the impact duration, and obtaining the reference voltage of the arrester by using the overvoltage multiple of the arrester and the operation impact protection horizontal voltage of the arrester; and determining the parameters of the lightning arrester according to the reference voltage of the lightning arrester. According to the lightning arrester parameter determining method and device, the overvoltage multiple of the lightning arrester is obtained through the corresponding relation between the preset overvoltage multiple and the impact duration, the reference voltage of the lightning arrester is further obtained, and the lightning arrester parameter of the lightning arrester can be accurately determined according to the reference voltage of the lightning arrester.
In one embodiment, as shown in fig. 2, determining arrester parameters of the arrester based on a reference voltage of the arrester comprises the steps of:
step S201, obtaining the number of the resistor discs of a single resistor disc column of the lightning arrester based on the reference voltage of the lightning arrester.
The number of the resistance sheets of a single resistance sheet column is equal to that of each of the plurality of resistance sheet columns connected with the lightning arrester in parallel, wherein each resistance sheet column is composed of a plurality of resistance sheets connected in series.
Specifically, based on the reference voltage of the lightning arrester and the parameter limiting condition of the lightning arrester, the number of the resistor discs of a single resistor disc column of the lightning arrester can be calculated.
Step S202, obtaining the number of resistor disc columns of the lightning arrester based on the overvoltage multiple and the matching current of the lightning arrester; the lightning arrester comprises a plurality of parallel resistance card columns.
The number of the resistance card columns is the number of the plurality of parallel resistance card columns of the lightning arrester.
Specifically, based on the multiple of the overvoltage, the matching current of the lightning arrester, and the parameter limiting condition of the lightning arrester, the number of the resistor disc columns of the lightning arrester can be calculated.
In this embodiment, the number of the resistor discs and the number of the resistor disc columns of a single resistor disc column of the lightning arrester can be accurately calculated according to the reference voltage of the lightning arrester and the parameter limiting condition of the lightning arrester.
In one embodiment, as shown in fig. 3, obtaining the number of the resistor sheets of a single resistor sheet column of the lightning arrester based on the reference voltage of the lightning arrester comprises the following steps:
step S301, obtaining the reference voltage of a single resistance card obtained in advance, and obtaining the result of dividing the reference voltage of the lightning arrester and the reference voltage of the single resistance card.
The reference voltage of the single resistance sheet is the maximum continuous voltage which can be permanently applied to the single resistance sheet, and the division result of the reference voltage of the lightning arrester and the reference voltage of the single resistance sheet is the value of the division of the reference voltage of the lightning arrester by the reference voltage of the single resistance sheet.
Specifically, the reference voltage of the single resistive sheet obtained in advance is obtained, and the reference voltage of the lightning arrester is divided by the reference voltage of the single resistive sheet to obtain the result, for example, if the reference voltage of the single resistive sheet is 4.9kV, and the reference voltage of the lightning arrester is 71.46kV, the result of dividing the reference voltage of the lightning arrester and the reference voltage of the single resistive sheet is 71.46/4.9= 14.58.
And step S302, obtaining the number of the resistance sheets of a single resistance sheet column of the lightning arrester based on the division result.
Specifically, if the result of dividing the reference voltage of the arrester by the reference voltage of the single resistive sheet is an integer, the number of resistive sheets of the single resistive sheet column of the arrester is the result, and if the result is not an integer, the number of resistive sheets of the single resistive sheet column of the arrester is an integer value after the result. For example, the division of the reference voltage of the lightning arrester and the reference voltage of a single resistive sheet results in 71.46/4.9=14.58 sheets, and the number of resistive sheets of a single resistive sheet column of the lightning arrester is 15 sheets.
In this embodiment, the number of the resistor discs of a single resistor disc column of the lightning arrester can be accurately obtained by obtaining a result of dividing the reference voltage of the lightning arrester by the reference voltage of the single resistor disc.
In one embodiment, as shown in fig. 4, obtaining the number of the resistor disc columns of the arrester based on the overvoltage multiple and the matching current of the arrester includes the following steps:
step S401, obtaining a corrected overvoltage multiple based on the overvoltage multiple and a pre-obtained overvoltage multiple correction coefficient; the corrected overvoltage multiple is used for representing the overvoltage multiple of a single resistor disc.
The overvoltage multiple correction coefficient is a correction coefficient for correcting the overvoltage multiple of the lightning arrester to the overvoltage multiple of the single resistance sheet, and the overvoltage multiple of the single resistance sheet and the overvoltage multiple of the lightning arrester have certain numerical difference in practice.
Specifically, the corrected overvoltage multiple is obtained based on the overvoltage multiple and a previously obtained overvoltage multiple correction coefficient. For example, when the overvoltage multiple correction coefficient is 0.98, the corrected overvoltage multiple is 1.23 × 0.98=1.206.
And step S402, obtaining the operation impact protection horizontal voltage of the single resistance sheet based on the corrected overvoltage multiple and the reference voltage of the single resistance sheet.
Wherein the operating surge protection level voltage of a single resistive sheet is the maximum allowable peak voltage at the terminal of the single resistive sheet operating surge protection device.
Specifically, the reference voltage of the single resistor disc is multiplied by the corrected overvoltage multiple, so that the operation impact protection horizontal voltage of the single resistor disc is obtained. For example, if the corrected overvoltage multiple is 1.23 × 0.98=1.206 and the reference voltage of a single resistive sheet is 4.9kV, the operating surge protection level voltage of the single resistive sheet is 4.9 × 1.206=5.91kv.
Step S403, obtaining the matching current of the single resistance card through a resistance card volt-ampere curve of the single resistance card obtained in advance based on the operation impact protection horizontal voltage of the single resistance card; the matching current of the single resistance card is also the matching current of the single resistance card column.
The volt-ampere curve of the single resistance chip is a function relation curve of voltage and current of the single resistance chip, the matching current of the single resistance chip is current corresponding to the operation impact protection level voltage of the single resistance chip, and the matching current of the single resistance chip is the matching current of the single resistance chip because the single resistance chip column is formed by connecting the plurality of resistance chips in series.
Specifically, the matching current of a single resistor is obtained through a resistor volt-ampere curve of the single resistor obtained in advance based on the operation surge protection level voltage of the single resistor, for example, the operation protection level voltage of the single resistor should be 4.9 × 1.206=5.91kv, and the matching current of the corresponding single resistor at this time is about 70A according to the resistor volt-ampere curve.
And S404, obtaining the number of the resistor disc columns of the lightning arrester based on the matching current of the single resistor disc and the matching current of the lightning arrester.
Specifically, since the matching current of a single resistor disc, that is, the matching current of a single resistor disc column, is obtained by connecting a plurality of resistor disc columns in parallel, the matching current of the lightning arrester is divided by the matching current of the single resistor disc, so that the number of resistor disc columns of the lightning arrester can be obtained. For example, the matching current of a single resistor disc is about 70A, and the matching current of the lightning arrester is 0.99kA obtained in advance, the number of columns of the lightning arrester parallel resistor disc is greater than 990/70=14.1 columns, four columns in the lightning arrester are connected in parallel to form one lightning arrester element, and it can be determined that the number of parallel columns of the lightning arrester resistor disc is 16 columns, and 4 lightning arrester elements are required to be connected in parallel.
In the embodiment, the number of the resistor disc columns of the lightning arrester can be accurately obtained by accurately calculating the matching current of a single resistor disc and the matching current of the lightning arrester.
In one embodiment, after obtaining the number of the resistor disc columns of the lightning arrester, the method further comprises the following steps:
obtaining the number of the resistor discs of the lightning arrester based on the number of the resistor discs of a single resistor disc column and the number of the resistor disc columns of the lightning arrester; obtaining the energy absorption capacity of the lightning arrester based on the energy absorption capacity of the single resistance card obtained in advance and the number of the resistance cards; if the energy absorption capacity of the lightning arrester is larger than a preset value, the energy absorption capacity of the lightning arrester passes through energy detection; and if the energy absorption capacity of the lightning arrester is smaller than or equal to a preset value, recalculating the number of the resistance sheets of a single resistance sheet column of the lightning arrester and the number of the resistance sheet columns of the lightning arrester.
The number of the resistor discs of the lightning arrester is the total number of the resistor discs of the lightning arrester, the energy absorption capacity of a single resistor disc is the energy absorption capacity of the single resistor disc when the single resistor disc is impacted by current, and the preset value is a preset critical value of the energy absorption capacity of the lightning arrester.
Specifically, the number of the resistance sheets of a single resistance sheet column and the number of the resistance sheet columns of the lightning arrester are multiplied to obtain the number of the resistance sheets of the lightning arrester, then the number of the resistance sheets of the lightning arrester is multiplied to obtain the energy absorption capacity of the lightning arrester, if the energy absorption capacity of the lightning arrester is larger than a preset value, the energy absorption capacity of the lightning arrester passes through energy detection, and the number of the resistance sheets of the single resistance sheet column and the number of the resistance sheet columns of the lightning arrester can be processed in the next step; and if the energy absorption capacity of the lightning arrester is smaller than or equal to the preset value, recalculating the number of the resistance cards of the single resistance card column of the lightning arrester and the number of the resistance card columns of the lightning arrester. For example, the energy absorption capacity of a single resistor disc of the lightning arrester is about 42.1kJ, the energy current capacity is 16 × 15 × 42.1=10.11mj, and is greater than the preset value of 2.6kJ, and then the energy absorption capacity of the lightning arrester is detected through energy.
In this embodiment, after the energy absorption capacity of the lightning arrester is calculated, the energy absorption capacity of the lightning arrester is compared with a preset value, so that whether the energy absorption capacity of the lightning arrester passes through energy detection or not can be accurately determined.
In one embodiment, if the energy absorption capacity of the arrester is greater than the preset value, after the energy absorption capacity of the arrester passes the energy detection, the method further includes the following steps:
obtaining the number of spare resistance sheet columns of the lightning arrester based on the number of the resistance sheet columns of the lightning arrester and a preset proportionality coefficient of the spare resistance sheet columns; and obtaining the final number of the resistor disc columns of the lightning arrester based on the number of the standby resistor disc columns of the lightning arrester and the number of the resistor disc columns of the lightning arrester.
The spare resistance card columns are reserved for the lightning arrester, the proportionality coefficient of the spare resistance card columns is the ratio of the number of the spare resistance card columns to the number of the resistance card columns of the lightning arrester, and the number of the final resistance card columns is the number of the resistance card columns finally configured by the lightning arrester.
Specifically, the number of the resistor disc columns of the lightning arrester is multiplied by a preset proportional coefficient of the standby resistor disc columns to obtain the number of the standby resistor disc columns of the lightning arrester, and then the number of the standby resistor disc columns is added to the number of the resistor disc columns of the lightning arrester to obtain the final number of the resistor disc columns of the lightning arrester. For example, if the proportionality coefficient of the spare resistive sheet columns is 20%, the number of the spare resistive sheet columns is 16 × 20% =3.2 columns, actually 4 columns are taken, the number of the final resistive sheet columns of the lightning arrester is 16+4=20 columns, 4 resistive sheet columns are connected in parallel to form one lightning arrester element, and 5 lightning arrester elements are required to be connected in parallel.
In this embodiment, the final number of the resistor disc columns of the lightning arrester is obtained by calculating the number of the spare resistor disc columns. The lightning arrester with the parameters can be safer and more stable in operation.
In one embodiment, as shown in fig. 5, a method for confirming parameters of a high-capacity lightning arrester is provided, which specifically comprises the following steps:
1. determining a reference voltage of a lightning arrester
Firstly, parameter setting conditions of the lightning arrester are defined through electromagnetic transient software, and as shown in the following table 1, the parameter setting conditions include: sustained voltage, operating surge protection level, mating current, energy absorption capacity, surge duration.
TABLE 1 lightning arrester parameter setting condition table
And then extracting overvoltage-time characteristic curves of part of lightning arrester manufacturers under different impact wavelengths through long-wave impact test results, comprehensively considering factors such as test measurement deviation and formula difference of different manufacturers, and fitting a calculation formula of the overvoltage multiple k.
k＝0.14e -T/76.32 +1.22；
When the impact time is 200ms, the overvoltage multiple k =1.23 according to the above calculation formula, and the reference voltage of the direct current arrester should be not less than 87.9/1.23=71.46kv;
2. determining the serial number of resistance cards
The reference voltage of the single resistor disc is 4.9kV, and in order to meet the requirement that the direct current reference voltage is larger than 71.46kV, the serial number of the single resistor discs is 71.46/4.9=14.58 discs =15 discs.
3. Determining parallel number of resistance cards
The ratio of the overall operation protection level of the lightning arrester to the maximum reference voltage is 87.9/(71.46 × 1.02) =1.206, the operation protection level of the single-chip resistor disc is 4.9 × 1.206=5.91kv, the corresponding matching current at this time is about 70A according to a volt-ampere curve of the resistor disc, the matching current of the lightning arrester determined by system research is 0.99kA, the number of the parallel resistor disc columns of the lightning arrester is greater than 990/70=14.1 columns, and the number of the parallel resistor disc columns of the lightning arrester is determined to be 16 columns according to a four-column parallel structure in each lightning arrester, so 4 lightning arresters are required to be connected in parallel.
4. Energy check
The energy absorption capacity of a single resistor disc of the lightning arrester is about 42.1kJ, the energy current capacity is 16 multiplied by 15 multiplied by 42.1=10.11MJ, the energy current capacity is larger than the required value of 2.6kJ, and the energy passes through verification.
5. Protection level checking
The matching current 990/16 of each column is approximately equal to 66.6A, according to the volt-ampere curve of the resistance card, the operation impact protection level of a single resistance card under 66.6A is 5.86kV, the ratio of the operation protection level of the single resistance card to the maximum reference voltage is 5.86/4.9=1.196, the operation protection level of the whole lightning arrester is 71.46 × 1.02 × 1.196, approximately equal to 87.2kV and less than 87.9kV, and the protection level is checked to pass.
6. Final parameter determination
Considering that 20% of hot stock is 16 × 20% =3.2, 4 columns are actually hot stock. And finally, the lightning arrester is configured by connecting 20 columns of resistance cards in parallel, and the structure is designed to connect four columns of each element in parallel, and 5 elements in total in parallel.
It should be understood that, although the steps in the flowcharts related to the embodiments as described above are sequentially displayed as indicated by arrows, the steps are not necessarily performed sequentially as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be rotated or alternated with other steps or at least a part of the steps or stages in other steps.
Based on the same inventive concept, the embodiment of the application also provides an arrester parameter determining device for realizing the arrester parameter determining method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the method, so the specific limitations in one or more lightning arrester parameter determination device embodiments provided below can refer to the limitations on the lightning arrester parameter determination method in the foregoing, and details are not described here.
In one embodiment, as shown in fig. 6, there is provided an arrester parameter determining apparatus including: a limiting condition obtaining module 601, a reference voltage obtaining module 602 and an arrester parameter obtaining module 603, wherein:
the limiting condition acquisition module 601 is used for acquiring the parameter limiting condition of the lightning arrester with the parameter to be determined; the parameter limiting conditions include: the operation impact protection horizontal voltage of the arrester and the impact duration of the arrester;
a reference voltage obtaining module 602, configured to obtain an overvoltage multiple of the arrester based on the impact duration of the arrester and a preset correspondence between the overvoltage multiple and the impact duration, and obtain a reference voltage of the arrester by using the overvoltage multiple of the arrester and an operation impact protection horizontal voltage of the arrester;
and an arrester parameter obtaining module 603, configured to determine an arrester parameter of the arrester according to the reference voltage of the arrester.
In one embodiment, the arrester parameter obtaining module 603 is further configured to obtain the number of the resistor discs of a single resistor disc column of the arrester based on the reference voltage of the arrester; obtaining the number of resistor disc columns of the lightning arrester based on the overvoltage multiple and the matching current of the lightning arrester; the lightning arrester comprises a plurality of parallel resistance card columns.
In one embodiment, the arrester parameter obtaining module 603 is further configured to obtain a reference voltage of a single resistor disc obtained in advance, and obtain a result of dividing the reference voltage of the arrester by the reference voltage of the single resistor disc; and obtaining the number of the resistor discs of the single resistor disc column of the lightning arrester based on the division result.
In one embodiment, the arrester parameter obtaining module 603 is further configured to obtain a corrected overvoltage multiple based on the overvoltage multiple and a pre-obtained overvoltage multiple correction coefficient; the corrected overvoltage multiple is used for representing the overvoltage multiple of a single resistance chip; obtaining the operation impact protection level voltage of a single resistance card based on the corrected overvoltage multiple and the reference voltage of the single resistance card; based on the operation surge protection horizontal voltage of a single resistance card, obtaining the matching current of the single resistance card through a resistance card volt-ampere curve of the single resistance card obtained in advance; the matching current of a single resistance card is also the matching current of a single resistance card column; and obtaining the number of the resistor disc columns of the lightning arrester based on the matching current of the single resistor disc and the matching current of the lightning arrester.
In one embodiment, the arrester parameter obtaining module 603 is further configured to obtain the number of the resistor discs of the arrester based on the number of the resistor discs of a single resistor disc column and the number of the resistor disc columns of the arrester; obtaining the energy absorption capacity of the lightning arrester based on the energy absorption capacity of the single resistance card obtained in advance and the number of the resistance cards; if the energy absorption capacity of the lightning arrester is larger than a preset value, the energy absorption capacity of the lightning arrester passes through energy detection; and if the energy absorption capacity of the lightning arrester is smaller than or equal to a preset value, recalculating the number of the resistance sheets of a single resistance sheet column of the lightning arrester and the number of the resistance sheet columns of the lightning arrester.
In one embodiment, the arrester parameter obtaining module 603 is further configured to obtain the number of spare resistance sheet columns of the arrester based on the number of resistance sheet columns of the arrester and a preset proportionality coefficient of the spare resistance sheet columns; and obtaining the final number of the resistor disc columns of the lightning arrester based on the number of the standby resistor disc columns of the lightning arrester and the number of the resistor disc columns of the lightning arrester.
All or part of each module in the lightning arrester parameter device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 7. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a lightning arrester parameter method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In an embodiment, a computer device is further provided, which includes a memory and a processor, the memory stores a computer program, and the processor implements the steps of the above method embodiments when executing the computer program.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.
In an embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, carries out the steps in the method embodiments described above.
It should be noted that, the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, presented data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above may be implemented by hardware instructions of a computer program, which may be stored in a non-volatile computer-readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. Any reference to memory, databases, or other media used in the embodiments provided herein can include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high-density embedded nonvolatile Memory, resistive Random Access Memory (ReRAM), magnetic Random Access Memory (MRAM), ferroelectric Random Access Memory (FRAM), phase Change Memory (PCM), graphene Memory, and the like. Volatile Memory can include Random Access Memory (RAM), external cache Memory, and the like. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others. The databases referred to in various embodiments provided herein may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, quantum computing based data processing logic devices, etc., without limitation.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. A method for determining parameters of a lightning arrester, the method comprising:
acquiring a parameter limiting condition of the lightning arrester with parameters to be determined; the parameter defining conditions include: an operational surge protection level voltage of the arrester and a surge duration of the arrester;
obtaining the overvoltage multiple of the arrester based on the impact duration of the arrester and the corresponding relation between the preset overvoltage multiple and the impact duration, and obtaining the reference voltage of the arrester by using the overvoltage multiple of the arrester and the operation impact protection horizontal voltage of the arrester;
and determining the parameters of the lightning arrester according to the reference voltage of the lightning arrester.
2. The method of claim 1, wherein the parameter defining condition further comprises: the matching current of the lightning arrester; the lightning arrester parameters of the lightning arrester comprise the number of the single resistance card columns of the lightning arrester and the number of the resistance card columns of the lightning arrester; the determining the parameters of the lightning arrester according to the reference voltage of the lightning arrester comprises the following steps:
obtaining the number of resistance cards of a single resistance card column of the lightning arrester based on the reference voltage of the lightning arrester;
obtaining the number of resistor disc columns of the lightning arrester based on the overvoltage multiple and the matching current of the lightning arrester; the lightning arrester comprises a plurality of parallel resistance card columns.
3. The method of claim 2, wherein the single resistive sheet column comprises a plurality of resistive sheets connected in series; the obtaining of the number of the resistor discs of a single resistor disc column of the arrester based on the reference voltage of the arrester comprises:
obtaining a reference voltage of a single resistance card obtained in advance, and obtaining a result of dividing the reference voltage of the lightning arrester by the reference voltage of the single resistance card;
and obtaining the number of the resistor discs of the single resistor disc column of the lightning arrester based on the division result.
4. The method of claim 3, wherein the obtaining the number of resistive patch columns of the arrester based on the overvoltage multiple and the mating current of the arrester comprises:
obtaining a corrected overvoltage multiple based on the overvoltage multiple and a pre-obtained overvoltage multiple correction coefficient; the corrected overvoltage multiple is used for representing the overvoltage multiple of the single resistor disc;
obtaining the operation impact protection horizontal voltage of the single resistor disc based on the corrected overvoltage multiple and the reference voltage of the single resistor disc;
obtaining the matching current of the single resistance card through a resistance card volt-ampere curve of the single resistance card obtained in advance based on the operation impact protection horizontal voltage of the single resistance card; the matching current of the single resistor disc is also the matching current of the single resistor disc column;
and obtaining the number of the resistor disc columns of the lightning arrester based on the matching current of the single resistor disc and the matching current of the lightning arrester.
5. The method according to claim 4, wherein after obtaining the number of the resistor disc columns of the lightning arrester, the method further comprises:
obtaining the number of the resistor discs of the lightning arrester based on the number of the resistor discs of the single resistor disc column and the number of the resistor disc columns of the lightning arrester;
obtaining the energy absorption capacity of the lightning arrester based on the energy absorption capacity of the single resistor disc obtained in advance and the number of the resistor discs;
if the energy absorption capacity of the lightning arrester is larger than a preset value, the energy absorption capacity of the lightning arrester passes through energy detection;
and if the energy absorption capacity of the lightning arrester is smaller than or equal to a preset value, recalculating the number of the resistance cards of a single resistance card column of the lightning arrester and the number of the resistance card columns of the lightning arrester.
6. The method according to claim 5, wherein if the energy absorption capacity of the lightning arrester is greater than a preset value, after the energy absorption capacity of the lightning arrester passes the energy detection, the method further comprises:
obtaining the number of spare resistance sheet columns of the lightning arrester based on the number of the resistance sheet columns of the lightning arrester and a preset proportionality coefficient of the spare resistance sheet columns;
and obtaining the final number of the resistor disc columns of the lightning arrester based on the number of the standby resistor disc columns of the lightning arrester and the number of the resistor disc columns of the lightning arrester.
7. An arrester parameter determination apparatus, the apparatus comprising:
the limited condition acquisition module is used for acquiring the parameter limited condition of the lightning arrester with the parameter to be determined; the parameter defining conditions include: an operational surge protection level voltage of the arrester and a surge duration of the arrester;
the reference voltage acquisition module is used for obtaining the overvoltage multiple of the lightning arrester based on the impact duration of the lightning arrester and the corresponding relation between the preset overvoltage multiple and the impact duration, and obtaining the reference voltage of the lightning arrester by using the overvoltage multiple of the lightning arrester and the operation impact protection horizontal voltage of the lightning arrester;
and the lightning arrester parameter acquisition module is used for determining the lightning arrester parameters of the lightning arrester according to the reference voltage of the lightning arrester.
8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any one of claims 1 to 6 when executing the computer program.
9. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
10. A computer program product comprising a computer program, characterized in that the computer program realizes the steps of the method of any one of claims 1 to 6 when executed by a processor.
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| CN202211223006.6A CN115473195A (en) | 2022-10-08 | 2022-10-08 | Lightning arrester parameter determination method, device, equipment, storage medium and program product |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211223006.6A CN115473195A (en) | 2022-10-08 | 2022-10-08 | Lightning arrester parameter determination method, device, equipment, storage medium and program product |
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