CN109752614B - Lightning arrester parameter measurement method and system - Google Patents
Lightning arrester parameter measurement method and system Download PDFInfo
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Abstract
The application provides a lightning arrester parameter measurement method and a lightning arrester parameter measurement system, wherein the lightning arrester parameter measurement method comprises the following steps: measuring the low current volt-ampere characteristics of each resistor disc unit in each arrester element at different arrester temperatures; measuring the temperature of each resistor disc unit and the current of each resistor disc unit in each lightning arrester element when the temperature of the lightning arrester is stable and unchanged; generating a temperature distribution curve according to the temperature of each resistor disc unit of each lightning arrester element; generating a current distribution curve according to the current of each resistor disc unit of each lightning arrester element; generating a voltage of each resistor disc unit according to the current of each resistor disc unit of each lightning arrester element and the low-current volt-ampere characteristic of each resistor disc unit; and generating various voltage distribution non-uniformity coefficients and lightning arrester voltage distribution curves according to the voltages of the resistor disc units of each lightning arrester element. The application has the advantages of improving the test efficiency of the lightning arrester, reducing the workload of the lightning arrester test and improving the parameter measurement precision.
Description
Technical Field
The application relates to the technical field of lightning arrester tests, in particular to a lightning arrester parameter measurement method and a lightning arrester parameter measurement system.
Background
Lightning arresters are important protective appliances for power systems and have been widely used in power systems. Among these, the voltage distribution and temperature distribution characteristics of the arrester are important parameters for the design and operation of the arrester. The long-term stability test, the action load test and the power frequency tolerance time characteristic test of the lightning arrester are carried out on a proportion unit of the lightning arrester, and related test parameters of the lightning arrester need to be determined through voltage distribution and temperature distribution characteristics of the lightning arrester, and the test is a key test item of the design and the test of the lightning arrester. At present, a voltage distribution test and a temperature characteristic test are independently carried out, wherein the voltage distribution test only considers the influence of the capacitance value of the lightning arrester, and the steady-state temperature rise in the operation of the lightning arrester is not considered in a verification test. As the operating charge rate of the arrester increases, the steady-state temperature rise in operation of the arrester also increases.
Therefore, how to obtain the voltage distribution of the lightning arrester consistent with the actual running condition, and measure the voltage distribution, the current distribution and the temperature distribution of the lightning arrester at the same time, so as to improve the measuring efficiency is a technical problem to be solved at present.
Disclosure of Invention
In order to solve the problems in the prior art, the application provides the lightning arrester parameter measurement method and the lightning arrester parameter measurement system, which can obtain the lightning arrester voltage distribution consistent with the actual running condition, realize the simultaneous measurement of the lightning arrester voltage distribution, the current distribution and the temperature distribution, provide data for the design, the test and the operation of the lightning arrester, and provide relevant test parameters for the test verification of the lightning arrester, thereby improving the test efficiency of the lightning arrester, and relieving the workload of the test of the lightning arrester and the high-precision measurement of the parameters.
In order to achieve the above object, the present application provides a lightning arrester parameter measurement method, which includes:
measuring the low current volt-ampere characteristics of each resistor disc unit in each arrester element at different arrester temperatures;
measuring the temperature of each resistor disc unit and the current of each resistor disc unit in each lightning arrester element when the temperature of the lightning arrester is stable and unchanged;
generating a lightning arrester temperature profile from the temperature of each of the resistor disc units of each lightning arrester element; and
Generating a lightning arrester current profile from the current of each of the resistive sheet units of each lightning arrester element;
generating a voltage of each of the resistor disc units of each of the lightning arrester elements according to a current of each of the resistor disc units and a low current volt-ampere characteristic of each of the resistor disc units;
and generating a voltage distribution non-uniformity coefficient of each resistor disc unit of each lightning arrester element according to the voltage of each resistor disc unit of each lightning arrester element.
The application also provides a lightning arrester parameter measurement system, which comprises:
a first measuring unit for measuring the low current volt-ampere characteristics of each resistor disc unit in each arrester element at different arrester temperatures;
the second measuring unit is used for measuring the temperature of each resistor disc unit and the current of each resistor disc unit in each lightning arrester element;
a temperature distribution generating unit for generating a lightning arrester temperature distribution curve from the temperatures of the respective resistor disc units of each lightning arrester element; and
A current distribution generating unit for generating a lightning arrester current distribution curve from the current of each of the resistor disc units of each lightning arrester element;
a voltage distribution generation unit for generating a voltage of each of the resistor disc units of each of the lightning arrester elements based on a current of each of the resistor disc units of each of the lightning arrester elements and a low-current volt-ampere characteristic of each of the resistor disc units;
and the coefficient distribution generation unit is used for generating the voltage distribution non-uniformity coefficient of each resistor disc unit of each lightning arrester element and a lightning arrester voltage distribution curve according to the voltage of each resistor disc unit of each lightning arrester element.
The application also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the steps of the lightning arrester parameter measurement method when executing the program.
The application also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of the arrester parameter measurement method described above.
The application provides a lightning arrester parameter measurement method and a lightning arrester parameter measurement system, comprising the following steps: measuring the low current volt-ampere characteristics of each resistor disc unit in each arrester element at different arrester temperatures; measuring the temperature of each resistor disc unit and the current of each resistor disc unit in each lightning arrester element when the temperature of the lightning arrester is stable and unchanged; generating a lightning arrester temperature profile from the temperature of each of the resistor disc units of each lightning arrester element; generating a lightning arrester current profile from the current of each of the resistive sheet units of each lightning arrester element; generating a voltage of each of the resistor disc units of each of the lightning arrester elements according to a current of each of the resistor disc units and a low current volt-ampere characteristic of each of the resistor disc units; and generating a voltage distribution non-uniformity coefficient of each resistor disc unit of each lightning arrester element according to the voltage of each resistor disc unit of each lightning arrester element. The application has the advantages of improving the test efficiency of the lightning arrester, reducing the workload of the lightning arrester test and improving the parameter measurement precision.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for measuring parameters of an arrester in accordance with the present application;
FIG. 2 is a schematic view of lightning arrester parameter measurement in an embodiment of the application;
FIG. 3 is a flow chart of a method for measuring parameters of an arrester in an embodiment of the present application;
FIG. 4 is a flowchart of step S206 in an embodiment of the present application;
FIG. 5 is a schematic view of lightning arrester parameter measurement in an embodiment of the application;
fig. 6 is a schematic structural view of an arrester parameter measurement system of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "first," "second," … …, and the like, as used herein, do not denote a particular order or sequence, nor are they intended to be limiting of the application, but rather are merely used to distinguish one element or operation from another in the same technical terms.
As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.
As used herein, "and/or" includes any or all combinations of such things.
Aiming at the defects in the prior art, the application provides a lightning arrester parameter measurement method, a flow chart of which is shown in figure 1, which comprises the following steps:
s101: the low current volt-ampere characteristics of the individual resistor disc units in each arrester element were measured at different arrester temperatures.
S102: when the temperature of the lightning arrester is stable, the temperature of each resistor disc unit and the current of each resistor disc unit in each lightning arrester element are measured.
S103: a lightning arrester temperature profile is generated from the temperature of the respective resistive sheet element of each lightning arrester element.
S104: a lightning arrester current profile is generated from the current of each resistive sheet element of each lightning arrester element.
S105: the voltage of each resistor disc unit of each arrester element is generated from the current of each resistor disc unit of each arrester element and the low current volt-ampere characteristics of each resistor disc unit.
S106: and generating the voltage distribution non-uniformity coefficient of each resistor disc unit of each lightning arrester element according to the voltage of each resistor disc unit of each lightning arrester element.
As can be seen from the flow shown in FIG. 1, the application provides data for the design, test and operation of the lightning arrester and provides relevant test parameters for the test verification of the lightning arrester by measuring the voltage distribution, the current distribution and the temperature distribution of the lightning arrester, thereby having the beneficial effects of improving the test efficiency of the lightning arrester, reducing the workload of the lightning arrester test and improving the parameter measurement precision.
In order to better understand the present application, a more detailed example is set forth below. The application provides a lightning arrester parameter measuring device, which comprises: and the measuring unit, the receiving and transmitting unit and the computer are connected in sequence. Wherein the measurement unit comprises: the device comprises a temperature sampling module, a first analog-to-digital conversion module, a current sampling module, a second analog-to-digital conversion module, a control processing module and a transmission module.
In particular, as shown in fig. 2, in this embodiment, the lightning arresters are formed by serially connecting j=2 lightning arresters, where each lightning arrester includes i=3 resistor disc units, and each resistor disc unit includes 5 resistor discs, which is not limited to this embodiment. The measuring units are uniformly arranged in the resistor disc column of the lightning arrester during measurement.
As shown in fig. 3, the embodiment of the application provides a lightning arrester parameter measurement method, which includes the following steps:
s201: the low current volt-ampere characteristics of the individual resistor disc units in each arrester element were measured at different arrester temperatures.
In specific implementation, N j Representing the number of resistor disc units in the j-th lightning arrester element and the number of measuring units in the j-th lightning arrester element. In this embodiment, the number of the resistor disc units is consistent with the number of the measuring units, which is not limited by the present application.
S202: when the temperature of the lightning arrester is stable, the temperature of each resistor disc unit and the current of each resistor disc unit in each lightning arrester element are measured.
In the implementation, as shown in fig. 2, the lightning arrester is installed according to the actual installation situation,applying continuous operation voltage to lightning arresters, and measuring the temperature T of each resistor disc unit in each lightning arrester element after the temperature is stabilized ij Current I of each resistor element ij 。
S203: a lightning arrester temperature profile is generated from the temperature of the respective resistive sheet element of each lightning arrester element.
In practice, the temperature T of each resistor element of each lightning arrester element is determined ij And drawing and generating a lightning arrester temperature distribution curve in a computer.
S204: a lightning arrester current profile is generated from the current of each resistive sheet element of each lightning arrester element.
In practice, the current I of each resistor element of each lightning arrester element is used for controlling ij And drawing and generating a lightning arrester current distribution curve in a computer.
S205: the voltage of each resistor disc unit of each arrester element is generated from the current of each resistor disc unit of each arrester element and the low current volt-ampere characteristics of each resistor disc unit.
In practice, according to the current I of each resistor element ij And the low current volt-ampere characteristic of each resistor disc unit generates a voltage U of each resistor disc unit ij 。
S206: and generating the voltage distribution non-uniformity coefficient of each resistor disc unit of each lightning arrester element according to the voltage of each resistor disc unit of each lightning arrester element.
As shown in fig. 4, the specific execution of step S206 includes the following steps:
s301: a voltage average value is generated from the voltages of the resistor elements.
In practice, according to the voltage U of each resistor unit ij Generating a voltage average value U av . Wherein the voltage average value
Specifically, as shown in FIG. 5, the 1 st arrester element includes N 1 =5 measurement units, wherein the voltage of each resistor disc unit is U 11 、U 21 、U 31 、U 41 、U 51 The 2 nd arrester element comprises N 2 =5 measurement units, wherein the voltage of each resistor disc unit is U 12 、U 22 、U 32 、U 42 、U 52 Average value of voltage
S302: and generating the voltage distribution non-uniformity coefficient of each resistor disc unit according to the voltage of each resistor disc unit and the average value of the voltages.
In specific implementation, a calculation formula of the voltage distribution non-uniformity coefficient of the resistor disc unit is shown as formula (1):
wherein K is ij For the voltage distribution non-uniformity coefficient of the ith resistor disc unit in the jth lightning arrester element, U ij For the voltage of the ith resistor disc unit in the jth arrester element, U av And i and j are positive integers which are voltage average values and are larger than or equal to 1.
S303: the maximum value of the voltage distribution unevenness coefficients of the respective resistor units is taken as the maximum voltage distribution unevenness coefficient.
In specific implementation, as shown in fig. 5, the voltage distribution non-uniformity coefficients of the 5 resistor disc units in the 1 st lightning arrester element are respectively: k (K) 11 、K 21 、K 31 、K 41 、K 51 The voltage distribution unevenness coefficients of the 5 resistance card units in the 2 nd arrester element are respectively: k (K) 12 、K 22 、K 32 、K 42 、K 52 . The magnitude relation of the voltage distribution non-uniformity coefficient is assumed as follows: k (K) 12 <K 11 <K 22 <K 21 <K 31 <K 32 <K 41 <K 42 <K 51 <K 52 It can be seen that the voltage distribution non-uniformity coefficient K of the 5 th resistor disc unit in the 2 nd arrester element 52 Maximum, then K 52 And judging whether the maximum voltage distribution non-uniformity coefficient of the lightning arrester meets a preset design threshold value or not as the maximum voltage distribution non-uniformity coefficient.
S304: and generating a lightning arrester voltage distribution curve according to the voltage of each resistor disc unit and the voltage distribution non-uniformity coefficient of each resistor disc unit.
In the specific implementation, according to the voltage U of each resistor unit ij Voltage distribution non-uniformity coefficient K of each resistor disc unit ij And drawing and generating a lightning arrester voltage distribution curve in a computer.
S207: and adding the measured reference voltages of the lightning arrester elements to generate the reference voltages of the lightning arrester.
In specific implementation, the lightning arrester reference voltage U refa The calculation formula of (2) is shown in formula 2:
U refa ＝∑U refuj (2)
wherein U is refa For lightning arrester reference voltage, U refuj And j is a positive integer greater than or equal to 1 for the reference voltage of the jth lightning arrester element.
S208: and generating temperature weights of the lightning arrester elements according to the reference voltages of the lightning arrester elements, the number of measuring units of the lightning arrester elements and the reference voltages of the lightning arrester.
In specific implementation, the calculation formula of the temperature weight of the lightning arrester element is shown as formula (3):
wherein beta is j Lightning arrester element temperature weight for jth lightning arrester element, U refuj A reference voltage of the lightning arrester element, U refa For the lightning arrester reference voltage, N j The number of the measuring units of the jth lightning arrester element is j, and j is a positive integer greater than or equal to 1.
S209: and generating a lightning arrester temperature weight according to the temperature of each resistor disc unit of each lightning arrester element and the temperature weight of each lightning arrester element.
In specific implementation, the calculation formula of the temperature weighting of the lightning arrester is shown as formula (4):
T av ＝∑(β j ×T ij ) (4)
wherein T is av Weighting the temperature of the arrester, beta j Temperature weight of lightning arrester element, T, being the j-th lightning arrester element ij The temperature of the ith resistor disc unit which is the jth lightning arrester element, i and j are positive integers which are larger than or equal to 1.
In one embodiment, as shown in fig. 2 and 5, the measurement units are first placed uniformly between the resistor disc units in the lightning arrester element and at the lower part of the resistor disc units, the low current volt-ampere characteristics of the resistor disc units are measured at different lightning arrester temperatures, and the low current volt-ampere characteristics of the resistor disc units are input into the computer. Wherein, as shown in fig. 5, the number of measuring units in each arrester element is 5, and the number of resistor disc units in each arrester element is 5.
Next, as shown in fig. 5, the reference voltage U of the arrester element 1 is measured refu1 Reference voltage U of lightning arrester element 2 at 152kV refu2 150kV, calculating the lightning arrester reference voltage U according to the formula (2) refa ＝152kV+150kV＝302kV。
Again, as shown in fig. 3, the lightning arresters are installed according to the actual installation situation, a continuous operation voltage of 159kV is applied to the lightning arresters, and after the temperature of the lightning arresters is stabilized, the temperature T of each resistor disc unit is measured ij Current value I ij . Based on the current I of each resistor unit ij And the low current volt-ampere characteristic of each resistor disc unit generates a voltage U of each resistor disc unit ij 。
Specifically, set N 1 ＝N 2 Voltage U of each resistor disc unit =5 ij And warmDegree T ij As shown in table 1.
To calculate the voltage distribution non-uniformity coefficient K of the resistor disc unit 11 11 For example, the specific calculation process is shown in formulas (5) and (6):
first, according to the voltage U of each resistor element ij Calculating the average value U of the voltage av The calculation process is shown in the formula (5):
then, according to the voltage average value U av Voltage U of each resistor disc unit in Table 1 ij And equation (1) calculating the voltage distribution unevenness coefficient K of the 1 st resistor disc unit in the 1 st arrester element 11 The specific calculation process is shown in the formula (6):
from equation (6), the voltage distribution non-uniformity coefficient K of the 1 st resistor disc unit in the 1 st lightning arrester element is known 11 The voltage distribution unevenness coefficient of each resistor disc unit in the 1 st arrester element and the voltage distribution unevenness coefficient of each resistor disc unit in the 2 nd arrester element were calculated in order according to the above calculation procedure, and the specific calculation results are shown in table 1.
According to the number N of measuring units in the 1 st lightning arrester element 1 Reference voltage U of lightning arrester element 1 =5 refu1 Reference voltage U of =152 kV and lightning arrester refa Calculation of lightning arrester element temperature weight β for 1 st lightning arrester element =302 kV and equation (3) 1 The specific calculation process is as follows (7):
according to measurements in lightning arrester element 2Number of units N 2 Reference voltage U of arrester element 2 =5 refu2 =150 kV, arrester reference voltage U refa Calculation of lightning arrester element temperature weight β for the 2 nd lightning arrester element =302 kV and equation (3) 2 The specific calculation process is as follows (8):
according to equation (7) and (8), the temperature weight beta of the 1 st lightning arrester element is known 1 Arrester element temperature weight β of 2 nd arrester element =0.126 2 =0.124, wherein the temperature weights of the arrester elements corresponding to the respective measurement unit numbers in the same arrester element are the same, as shown in table 1.
TABLE 1
As shown in table 1, since the temperatures of the measuring units 51 and 52 do not account for the temperature weight and the lightning arrester temperature weight, the lightning arrester element temperature weight β corresponding to the measuring unit 51 1 And the corresponding arrester element temperature weight beta of the measuring unit 52 2 Is empty.
Each K in Table 1 ij Sequencing according to the numerical value, the maximum voltage distribution non-uniformity coefficient K can be known m ＝(K ij ) max ＝8.7％。
Calculating the temperature weighting T of the lightning arrester according to the table 1 and the formula (4) av The specific calculation process is shown in the formula (9):
the maximum voltage distribution non-uniformity coefficient of the lightning arrester measured by the application is 8.7%, the design requirement that the voltage distribution non-uniformity coefficient of the lightning arrester is not more than 10% is met, and the temperature weighting of the lightning arrester is 25.01 ℃. The application provides data for the design, test and operation of the lightning arrester through the measurement of the voltage distribution, the current distribution and the temperature distribution of the lightning arrester, and provides relevant test parameters for the test verification of the lightning arrester, thereby having the beneficial effects of improving the test efficiency of the lightning arrester, reducing the workload of the test of the lightning arrester and improving the parameter measurement precision.
Based on the same application conception as the lightning arrester parameter measurement method, the application also provides a lightning arrester parameter measurement system, as described in the following embodiment. Because the principle of the arrester parameter measurement system for solving the problems is similar to that of the arrester parameter measurement method, the implementation of the arrester parameter measurement system can refer to the implementation of the arrester parameter measurement method, and the repetition is not repeated.
Fig. 6 is a schematic structural diagram of a lightning arrester parameter measurement system according to an embodiment of the present application, as shown in fig. 6, the system includes: a first measurement unit 101, a second measurement unit 102, a temperature distribution generation unit 103, a current distribution generation unit 104, a voltage distribution generation unit 105, and a coefficient distribution generation unit 106.
A first measuring unit 101 for measuring the low current volt-ampere characteristics of the resistor disc units in each arrester element at different arrester temperatures.
A second measuring unit 102 for measuring the temperature of each resistor disc unit and the current of each resistor disc unit in each arrester element.
A temperature distribution generating unit 103 for generating a lightning arrester temperature distribution curve from the temperatures of the respective resistor disc units of each lightning arrester element.
A current distribution generating unit 104 for generating a lightning arrester current distribution curve from the currents of the respective resistor disc units of each lightning arrester element.
And a voltage distribution generation unit 105 for generating the voltage of each resistor disc unit of each arrester element from the current of each resistor disc unit of each arrester element and the low current volt-ampere characteristic of each resistor disc unit.
And a coefficient distribution generation unit 106 for generating a voltage distribution unevenness coefficient of each resistor disc unit of each arrester element and an arrester voltage distribution curve from the voltages of each resistor disc unit of each arrester element.
Based on the same application concept as the lightning arrester parameter measurement method described above, the present application provides a computer device as described in the following embodiments. Because the principle of the computer equipment for solving the problems is similar to that of the lightning arrester parameter measurement method, the implementation of the computer equipment can refer to the implementation of the lightning arrester parameter measurement method, and the repetition is omitted.
In one embodiment, an electronic device includes: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing all the steps of the lightning arrester parameter measurement method in the above embodiment when executing the computer program, as shown in fig. 1, the processor implementing the following steps when executing the computer program:
s101: the low current volt-ampere characteristics of the individual resistor disc units in each arrester element were measured at different arrester temperatures.
S102: when the temperature of the lightning arrester is stable, the temperature of each resistor disc unit and the current of each resistor disc unit in each lightning arrester element are measured.
S103: a lightning arrester temperature profile is generated from the temperature of the respective resistive sheet element of each lightning arrester element.
S104: a lightning arrester current profile is generated from the current of each resistive sheet element of each lightning arrester element.
S105: the voltage of each resistor disc unit of each arrester element is generated from the current of each resistor disc unit of each arrester element and the low current volt-ampere characteristics of each resistor disc unit.
S106: and generating the voltage distribution non-uniformity coefficient of each resistor disc unit of each lightning arrester element according to the voltage of each resistor disc unit of each lightning arrester element.
Based on the same application conception as the lightning arrester parameter measurement method described above, the present application provides a computer-readable storage medium, as described in the following embodiments. Since the principle of the computer readable storage medium for solving the problems is similar to that of the lightning arrester parameter measurement method, the implementation of the computer readable storage medium can refer to the implementation of the lightning arrester parameter measurement method, and the repetition is omitted.
In one embodiment, a computer readable storage medium stores a computer program which, when executed by a processor, implements all the steps of the lightning arrester parameter measurement method in the above embodiment, as shown in fig. 1, and when executed by the processor implements the steps of:
s101: the low current volt-ampere characteristics of the individual resistor disc units in each arrester element were measured at different arrester temperatures.
S102: when the temperature of the lightning arrester is stable, the temperature of each resistor disc unit and the current of each resistor disc unit in each lightning arrester element are measured.
S103: a lightning arrester temperature profile is generated from the temperature of the respective resistive sheet element of each lightning arrester element.
S104: a lightning arrester current profile is generated from the current of each resistive sheet element of each lightning arrester element.
S105: the voltage of each resistor disc unit of each arrester element is generated from the current of each resistor disc unit of each arrester element and the low current volt-ampere characteristics of each resistor disc unit.
S106: and generating the voltage distribution non-uniformity coefficient of each resistor disc unit of each lightning arrester element according to the voltage of each resistor disc unit of each lightning arrester element.
The application provides a lightning arrester parameter measurement method and a lightning arrester parameter measurement system, comprising the following steps: measuring the low current volt-ampere characteristics of each resistor disc unit in each arrester element at different arrester temperatures; measuring the temperature of each resistor disc unit and the current of each resistor disc unit in each lightning arrester element when the temperature of the lightning arrester is stable and unchanged; generating a lightning arrester temperature distribution curve according to the temperature of each resistor disc unit of each lightning arrester element; and generating a lightning arrester current distribution curve according to the current of each resistor disc unit of each lightning arrester element; generating a voltage of each resistor disc unit of each lightning arrester element according to the current of each resistor disc unit of each lightning arrester element and the low current volt-ampere characteristic of each resistor disc unit; and generating the voltage distribution non-uniformity coefficient of each resistor disc unit of each lightning arrester element according to the voltage of each resistor disc unit of each lightning arrester element. The application has the advantages of improving the test efficiency of the lightning arrester, reducing the workload of the lightning arrester test and improving the parameter measurement precision.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The principles and embodiments of the present application have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Claims (6)
1. A lightning arrester parameter measurement method, characterized in that measurement units are placed evenly distributed between resistor disc units in a lightning arrester element and in a lower part of the resistor disc units to test lightning arrester parameters, the method comprising:
measuring the low current volt-ampere characteristics of each resistor disc unit in each arrester element at different arrester temperatures;
measuring the temperature of each resistor disc unit and the current of each resistor disc unit in each lightning arrester element when the temperature of the lightning arrester is stable and unchanged;
generating a lightning arrester temperature profile from the temperature of each of the resistor disc units of each lightning arrester element; and
Generating a lightning arrester current profile from the current of each of the resistive sheet units of each lightning arrester element;
generating a voltage of each of the resistor disc units of each of the lightning arrester elements according to a current of each of the resistor disc units and a low current volt-ampere characteristic of each of the resistor disc units;
generating a voltage distribution non-uniformity coefficient of each resistor disc unit of each lightning arrester element and a lightning arrester voltage distribution curve according to the voltage of each resistor disc unit of each lightning arrester element;
summing the measured reference voltages of all the lightning arrester elements to generate a lightning arrester reference voltage; generating temperature weights of the lightning arrester elements according to the reference voltages of the lightning arrester elements, the number of measuring units of the lightning arrester elements and the reference voltages of the lightning arrester; generating a lightning arrester temperature weight according to the temperature of each resistor disc unit of each lightning arrester element and the temperature weight of each lightning arrester element;
the calculation formula of the temperature weight of the lightning arrester element is as follows:
wherein beta is j Lightning arrester element temperature weight for jth lightning arrester element, U refuj A reference voltage of the lightning arrester element, U refa For the lightning arrester reference voltage, N j The number of the measuring units in the jth lightning arrester element is j, and j is a positive integer greater than or equal to 1;
the calculation formula of the temperature weighting of the lightning arrester is as follows:
T av ＝∑(β j ×T ij )
wherein T is av Weighting the temperature of the arrester, beta j Temperature of lightning arrester element for jth lightning arrester elementWeight, T ij The temperature of the ith resistor disc unit which is the jth lightning arrester element, i and j are positive integers which are larger than or equal to 1.
2. The lightning arrester parameter measurement method according to claim 1, wherein the generating the voltage distribution non-uniformity coefficient of each resistor disc unit of each lightning arrester element and the lightning arrester voltage distribution curve from the voltages of each resistor disc unit of each lightning arrester element includes:
generating a voltage average value according to the voltage of each resistor disc unit;
generating a voltage distribution non-uniformity coefficient of each resistor disc unit according to the voltage of each resistor disc unit and the average value of the voltages;
taking the maximum value of the voltage distribution non-uniformity coefficients of the resistor disc units as a maximum voltage distribution non-uniformity coefficient;
and generating the lightning arrester voltage distribution curve according to the voltage of each resistor disc unit and the voltage distribution non-uniformity coefficient of each resistor disc unit.
3. The lightning arrester parameter measurement method according to claim 2, wherein the calculation formula of the voltage distribution non-uniformity coefficient of the resistor disc unit is as follows:
wherein K is ij For the voltage distribution non-uniformity coefficient of the ith resistor disc unit in the jth lightning arrester element, U ij For the voltage of the ith resistor disc unit in the jth arrester element, U av And i and j are positive integers which are equal to or greater than 1 for the voltage average value.
4. A lightning arrester parameter measurement system, comprising:
a first measuring unit for measuring the low current volt-ampere characteristics of each resistor disc unit in each arrester element at different arrester temperatures;
the second measuring unit is used for measuring the temperature of each resistor disc unit and the current of each resistor disc unit in each lightning arrester element;
a temperature distribution generating unit for generating a lightning arrester temperature distribution curve from the temperatures of the respective resistor disc units of each lightning arrester element;
a current distribution generating unit for generating a lightning arrester current distribution curve from the current of each of the resistor disc units of each lightning arrester element;
a voltage distribution generation unit for generating a voltage of each of the resistor disc units of each of the lightning arrester elements based on a current of each of the resistor disc units of each of the lightning arrester elements and a low-current volt-ampere characteristic of each of the resistor disc units;
a coefficient distribution generating unit for generating a voltage distribution unevenness coefficient of each resistive sheet unit of each arrester element and an arrester voltage distribution curve from the voltages of each of the resistive sheet units of each arrester element;
the system is also for: summing the measured reference voltages of all the lightning arrester elements to generate a lightning arrester reference voltage; generating temperature weights of the lightning arrester elements according to the reference voltages of the lightning arrester elements, the number of measuring units of the lightning arrester elements and the reference voltages of the lightning arrester; generating a lightning arrester temperature weight according to the temperature of each resistor disc unit of each lightning arrester element and the temperature weight of each lightning arrester element;
the first measuring unit and the second measuring unit are uniformly distributed among the resistor disc units in the lightning arrester element and the lower parts of the resistor disc units;
the calculation formula of the temperature weight of the lightning arrester element is as follows:
wherein beta is j Lightning protection for the j-th lightning arrester elementElement temperature weight, U refuj A reference voltage of the lightning arrester element, U refa For the lightning arrester reference voltage, N j The number of the measuring units in the jth lightning arrester element is j, and j is a positive integer greater than or equal to 1;
the calculation formula of the temperature weighting of the lightning arrester is as follows:
T av ＝∑(β j ×T ij )
wherein T is av Weighting the temperature of the arrester, beta j Temperature weight of lightning arrester element, T, being the j-th lightning arrester element ij The temperature of the ith resistor disc unit which is the jth lightning arrester element, i and j are positive integers which are larger than or equal to 1.
5. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the lightning arrester parameter measurement method of any of claims 1 to 3 when the program is executed by the processor.
6. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the lightning arrester parameter measurement method according to any of claims 1 to 3.
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