CN117574726A - Method, system, equipment and medium for calculating discharge voltage of end fitting - Google Patents
Method, system, equipment and medium for calculating discharge voltage of end fitting Download PDFInfo
- Publication number
- CN117574726A CN117574726A CN202311592250.4A CN202311592250A CN117574726A CN 117574726 A CN117574726 A CN 117574726A CN 202311592250 A CN202311592250 A CN 202311592250A CN 117574726 A CN117574726 A CN 117574726A
- Authority
- CN
- China
- Prior art keywords
- discharge voltage
- hardware
- model
- calculation model
- altitude
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000004364 calculation method Methods 0.000 claims abstract description 192
- 238000012360 testing method Methods 0.000 claims abstract description 106
- 230000005684 electric field Effects 0.000 claims abstract description 47
- 238000009863 impact test Methods 0.000 claims abstract description 11
- 238000004590 computer program Methods 0.000 claims description 11
- 238000012937 correction Methods 0.000 claims description 11
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 230000005251 gamma ray Effects 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 238000004088 simulation Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000012212 insulator Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Data Mining & Analysis (AREA)
- General Engineering & Computer Science (AREA)
- Algebra (AREA)
- Geometry (AREA)
- Computational Mathematics (AREA)
- Evolutionary Computation (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Computer Hardware Design (AREA)
- Pure & Applied Mathematics (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a method, a system, equipment and a medium for calculating discharge voltage of an end fitting, and relates to the technical field of fittings. And calculating electric field distribution of the structural data under a plurality of preset altitudes and a plurality of preset gap distances by adopting a finite element method, and generating electric field distribution data. And performing a positive polarity operation impact discharge test based on the electric field distribution data to determine a streamer critical starting voltage and a hardware positive polarity operation impact discharge voltage. And respectively carrying out positive polarity operation impact test on the middle altitude corresponding to each preset altitude according to the critical starting voltage of the streamer, and generating a discharge voltage test value. And performing model updating based on the hardware positive polarity operation impulse discharge voltage and the discharge voltage test value to generate a target hardware discharge voltage calculation model. And calculating the end fitting discharge voltage through a target fitting discharge voltage calculation model. And calculating the critical starting voltage of the stream by finite element simulation, starting pressurization by using the critical starting voltage, and reducing test time and economic cost.
Description
Technical Field
The invention relates to the technical field of hardware fittings, in particular to a method, a system, equipment and a medium for calculating discharge voltage of an end hardware fitting.
Background
The valve hall device of the convertor station is an important component part in an electric power system and is used for realizing the transmission and conversion of electric energy. The discharge voltage of the end fitting of the valve hall equipment of the convertor station is one of important indexes for evaluating the state of the equipment and ensuring the safe operation of the equipment.
However, the difference in altitude may cause environmental conditions such as atmospheric pressure and temperature to change, thereby affecting accurate measurement and judgment of discharge voltage of the end fitting, which brings trouble to control and operation of the apparatus. The existing solutions often measure environmental parameters such as atmospheric pressure and temperature through sensors, and then compensate or correct the environmental parameters. However, this method requires the installation and maintenance of the sensor, increasing the equipment cost and the complexity of operation.
Disclosure of Invention
The invention provides a method, a system, equipment and a medium for calculating the discharge voltage of an end fitting, which solve the technical problems that the existing method for calculating the discharge voltage of the end fitting is used for measuring environmental parameters such as atmospheric pressure, temperature and the like through a sensor, the sensor needs to be installed and maintained, the equipment cost is increased, and the operation complexity is high.
The invention provides a method for calculating discharge voltage of an end fitting, which comprises the following steps:
acquiring structural data and actual altitude of an end fitting, calculating electric field distribution of the structural data at a plurality of preset altitudes and a plurality of preset gap distances by adopting a finite element method, and generating electric field distribution data;
performing a positive-polarity operation impulse discharge test according to the electric field distribution data to determine a streamer critical starting voltage and a hardware positive-polarity operation impulse discharge voltage;
respectively performing positive polarity operation impact tests on the middle altitude corresponding to each preset altitude according to the streamer critical starting voltage to generate a discharge voltage test value;
according to the hardware positive polarity operation impulse discharge voltage and the discharge voltage test value, performing model updating on an initial hardware discharge voltage calculation model to generate a target hardware discharge voltage calculation model;
substituting the actual altitude into the target hardware discharge voltage calculation model to calculate the voltage, and generating the discharge voltage corresponding to the end hardware.
Optionally, the step of performing the positive polarity operation impact discharge test according to the electric field distribution data to determine the streamer critical starting voltage and the hardware positive polarity operation impact discharge voltage includes:
Substituting the electric field distribution data into a preset photoionization model to calculate a discharge streamer critical starting voltage value of the end fitting, and generating a streamer critical starting voltage;
the photoionization criterion corresponding to the preset photoionization model is as follows:
wherein r is the radius of the electrode; r is (r) 1 Is the electron collapse head radius; z i Representing an ionospheric boundary, determined by α=η; alpha is the ionization coefficient; η is the adsorption coefficient; gamma ray ph Is the surface photoelectron emission coefficient; μ is the photon absorption coefficient; g (l) is a geometric factor;
and pressurizing from the critical start voltage of the stream to perform positive-polarity operation impulse discharge test on the test device corresponding to the end fitting, so as to generate the positive-polarity operation impulse discharge voltage of the fitting.
Optionally, the step of updating the initial hardware discharge voltage calculation model according to the hardware positive operation impulse discharge voltage and the discharge voltage test value to generate a target hardware discharge voltage calculation model includes:
selecting a gap distance discharge voltage corresponding to the hardware positive polarity operation impulse discharge voltage from a preset bar positive polarity operation impulse discharge voltage database, and generating a gap distance discharge voltage;
substituting the gap distance discharge voltage and the hardware positive polarity operation impulse discharge voltage into an initial hardware discharge voltage calculation model to calculate model parameters, and generating model parameters;
The initial hardware discharge voltage calculation model is as follows:
wherein U is discharge voltage; u (U) 0 The positive polarity operation impulse discharge voltage of the lower rod plate at the altitude of 0m is expressed as kV; h is the altitude, and the unit of H is m; k (k) 1 Is of form factor, k 2 As an altitude factor, k 1 、k 2 Taking 2.7183 in a dimensionless manner;
performing model updating on the initial hardware discharge voltage calculation model by adopting the model parameters to generate an intermediate hardware discharge voltage calculation model;
and carrying out model updating on the middle hardware fitting discharge voltage calculation model according to the discharge voltage test value to generate a target hardware fitting discharge voltage calculation model.
Optionally, the step of updating the model of the middle hardware discharge voltage calculation model according to the discharge voltage test value to generate a target hardware discharge voltage calculation model includes:
substituting the middle altitude corresponding to each preset altitude into the middle hardware fitting discharge voltage calculation model to calculate the discharge voltage, and generating a discharge voltage calculation value;
substituting the discharge voltage calculated value and the discharge voltage test value into a preset error calculation formula to perform error calculation, and generating a relative root mean square error;
The preset error calculation formula is as follows:
wherein δ is the relative root mean square error; n represents the total number of intermediate altitudes; i takes the value of 1,2 and … … n; u (U) i The discharge voltage test value is the ith intermediate altitude; u's' i A discharge voltage calculation value for the i-th intermediate altitude;
and updating the model of the middle hardware discharge voltage calculation model according to the relative root mean square error and a preset error threshold value to generate a target hardware discharge voltage calculation model.
Optionally, the step of updating the model of the middle hardware discharge voltage calculation model according to the relative root mean square error and the preset error threshold value to generate a target hardware discharge voltage calculation model includes:
judging whether the relative root mean square error is larger than a preset error threshold value or not;
if yes, taking the average value of the discharge voltage calculated value and the discharge voltage test value as the corresponding operation impulse discharge voltage;
substituting the operation impulse discharge voltage into the middle hardware discharge voltage calculation model to carry out model parameter correction, and generating a target hardware discharge voltage calculation model;
and if not, taking the middle hardware discharge voltage calculation model as the target hardware discharge voltage calculation model.
The invention also provides a system for calculating the discharge voltage of the end fitting, which comprises:
the electric field distribution data generation module is used for acquiring the structural data and the actual altitude of the end fitting, calculating the electric field distribution of the structural data under a plurality of preset altitudes and a plurality of preset gap distances by adopting a finite element method, and generating electric field distribution data;
the critical start voltage of the current and the positive polarity operation impulse discharge voltage of the hardware fitting are determined by the positive polarity operation impulse discharge test according to the electric field distribution data;
the discharge voltage test value generation module is used for respectively carrying out positive polarity operation impact tests on the middle altitude corresponding to each preset altitude according to the streamer critical starting voltage to generate a discharge voltage test value;
the target hardware discharge voltage calculation model generation module is used for carrying out model updating on the initial hardware discharge voltage calculation model according to the hardware positive polarity operation impulse discharge voltage and the discharge voltage test value to generate a target hardware discharge voltage calculation model;
and the discharge voltage generation module is used for substituting the actual altitude into the target hardware fitting discharge voltage calculation model to perform voltage calculation and generate the discharge voltage corresponding to the end hardware fitting.
Optionally, the streamer critical initiation voltage and hardware positive polarity operation impact discharge voltage determining module comprises:
the streamer critical starting voltage generation module is used for substituting the electric field distribution data into a preset photoionization model to calculate a discharge streamer critical starting voltage value of the end fitting, so as to generate streamer critical starting voltage;
the photoionization criterion corresponding to the preset photoionization model is as follows:
wherein r is the radius of the electrode; r is (r) 1 Is the electron collapse head radius; z i Representing an ionospheric boundary, determined by α=η; alpha is the ionization coefficient; η is the adsorption coefficient; gamma ray ph Is the surface photoelectron emission coefficient; μ is the photon absorption coefficient; g (l) is a geometric factor;
and the hardware positive operation impulse discharge voltage generation module is used for performing positive operation impulse discharge test on the test device corresponding to the end hardware from the streaming threshold starting voltage to generate hardware positive operation impulse discharge voltage.
Optionally, the target fitting discharge voltage calculation model generating module includes:
the gap distance discharge voltage generation module is used for selecting a gap distance discharge voltage corresponding to the hardware positive polarity operation impulse discharge voltage from a preset bar positive polarity operation impulse discharge voltage database to generate a gap distance discharge voltage;
The model parameter generation module is used for substituting the gap distance discharge voltage and the hardware positive polarity operation impulse discharge voltage into an initial hardware discharge voltage calculation model to perform model parameter calculation, so as to generate model parameters;
the initial hardware discharge voltage calculation model is as follows:
wherein U is discharge voltage; u (U) 0 The positive polarity operation impulse discharge voltage of the lower rod plate at the altitude of 0m is expressed as kV; h is the altitude, and the unit of H is m; k (k) 1 Is of form factor, k 2 As an altitude factor, k 1 、k 2 Taking 2.7183 in a dimensionless manner;
the middle hardware discharge voltage calculation model generation module is used for carrying out model updating on the initial hardware discharge voltage calculation model by adopting the model parameters to generate a middle hardware discharge voltage calculation model;
and the target hardware discharge voltage calculation model generation submodule is used for carrying out model updating on the middle hardware discharge voltage calculation model according to the discharge voltage test value to generate a target hardware discharge voltage calculation model.
The invention also provides an electronic device, which comprises a memory and a processor, wherein the memory stores a computer program, and the computer program, when executed by the processor, causes the processor to execute the steps of the method for realizing any one of the end fitting discharge voltage calculation methods.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed, implements the end fitting discharge voltage calculation method as any one of the above.
From the above technical scheme, the invention has the following advantages:
according to the invention, the electric field distribution of the structural data at a plurality of preset altitudes and a plurality of preset gap distances is calculated by acquiring the structural data and the actual altitude of the end fitting and adopting a finite element method, so as to generate electric field distribution data. And performing a positive polarity operation impact discharge test based on the electric field distribution data to determine a streamer critical starting voltage and a hardware positive polarity operation impact discharge voltage. And respectively carrying out positive polarity operation impact test on the middle altitude corresponding to each preset altitude according to the critical starting voltage of the streamer, and generating a discharge voltage test value. And updating the initial hardware discharge voltage calculation model based on the hardware positive operation impulse discharge voltage and the discharge voltage test value, and generating a target hardware discharge voltage calculation model. Substituting the actual altitude into a target hardware discharge voltage calculation model to calculate the voltage, and generating the discharge voltage corresponding to the end hardware. The technical problems that the existing end fitting discharge voltage calculation method is to measure environmental parameters such as atmospheric pressure and temperature through a sensor, the sensor needs to be installed and maintained, the equipment cost is increased, and the operation complexity is high are solved. And calculating the critical starting voltage of the stream by finite element simulation, starting pressurization by using the critical starting voltage, and reducing test time and economic cost. The gap structure and the altitude factors are considered in the construction of the model, so that the discharge voltage of the end fitting is calculated more accurately.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a flowchart of a method for calculating a discharge voltage of an end fitting according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for calculating a discharge voltage of an end fitting according to a second embodiment of the present invention;
FIG. 3 is a positive polarity standard operation impact discharge test layout diagram provided in a second embodiment of the present invention;
FIG. 4 is a graph showing the characteristics of a 3m gap discharge voltage U-altitude H from a 1.6m equalizing ring with a ring diameter to ground in accordance with a second embodiment of the present invention;
FIG. 5 is a graph showing the characteristics of the discharge voltage U-altitude H of a 4m gap between a 1.6m equalizing ring with a ring diameter and the ground in a vertical manner, provided by the second embodiment of the invention;
FIG. 6 is a graph showing the characteristics of a discharge voltage U-altitude H of a gap of a 1.6m equalizing ring with a ring diameter to the ground 6m vertically;
FIG. 7 is a graph showing the characteristics of a gap discharge voltage U-altitude H of a 2.6m diameter grading ring vertically to ground of 1.5m in accordance with a second embodiment of the present invention;
fig. 8 is a block diagram of a discharge voltage calculation system for an end fitting according to a third embodiment of the present invention.
The reference numerals in fig. 3 are:
1. a surge voltage generator; 2. a bellows; 3. an insulator; 4. a crane; 5. three-hole equalizing ball; 6. a test article; 7. and (5) grounding piles.
Detailed Description
The embodiment of the invention provides a method, a system, equipment and a medium for calculating the discharge voltage of an end fitting, which are used for solving the technical problems that the existing method for calculating the discharge voltage of the end fitting is used for measuring environmental parameters such as atmospheric pressure, temperature and the like through a sensor, the sensor needs to be installed and maintained, the equipment cost is increased, and the operation complexity is high.
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for calculating a discharge voltage of an end fitting according to an embodiment of the invention.
The first embodiment of the invention provides a method for calculating discharge voltage of an end fitting, which comprises the following steps:
and 101, acquiring structural data and actual altitude of the end fitting, calculating electric field distribution of the structural data at a plurality of preset altitudes and a plurality of preset gap distances by adopting a finite element method, and generating electric field distribution data.
The preset altitude refers to a preset altitude, which is generally set to 0m,1000m,2000m,3000m,4000m,5000m. The preset gap distance refers to a distance set as required.
In the embodiment of the invention, the electric field distribution of the end fitting at different clearance distances of each altitude (0 m,1000m,2000m,3000m, 750 m,5000 m) is obtained by using a finite element method, so that electric field distribution data are obtained.
And 102, performing a positive operation impulse discharge test according to the electric field distribution data to determine a streamer critical starting voltage and a hardware positive operation impulse discharge voltage.
In the embodiment of the invention, electric field distribution data are substituted into a preset photoionization model to calculate a discharge streamer critical starting voltage value of the end fitting, and a streamer critical starting voltage is generated. And (3) pressurizing from the critical start voltage of the stream to perform positive operation impulse discharge test on the test device corresponding to the end fitting, so as to generate positive operation impulse discharge voltage of the fitting.
And 103, respectively performing positive polarity operation impact tests on the middle altitude corresponding to each preset altitude according to the critical starting voltage of the streamer, and generating a discharge voltage test value.
In the present embodiment, the positive polarity operation impact test was performed on the basis of the intermediate heights (500 m,1500m,2500m, 4500 m) between the respective altitudes, respectively, to obtain respective discharge voltage test values.
And 104, updating the initial hardware discharge voltage calculation model according to the hardware positive operation impulse discharge voltage and the discharge voltage test value, and generating a target hardware discharge voltage calculation model.
In the embodiment of the invention, the gap distance discharge voltage corresponding to the hardware positive polarity operation impulse discharge voltage is selected from a preset bar positive polarity operation impulse discharge voltage database, and the gap distance discharge voltage is generated. Substituting the gap distance discharge voltage and the hardware positive operation impulse discharge voltage into an initial hardware discharge voltage calculation model to calculate model parameters, and generating model parameters. And carrying out model updating on the initial hardware discharge voltage calculation model by adopting model parameters to generate an intermediate hardware discharge voltage calculation model. And updating the model of the middle hardware discharge voltage calculation model based on the discharge voltage test value to generate a target hardware discharge voltage calculation model.
And 105, substituting the actual altitude into a target hardware discharge voltage calculation model to calculate the voltage, and generating a discharge voltage corresponding to the end hardware.
In the embodiment of the invention, after a target hardware discharge voltage calculation model corresponding to the end hardware is constructed, the actual altitude corresponding to the end hardware is substituted into the target hardware discharge voltage calculation model to perform voltage calculation, so that the discharge voltage corresponding to the end hardware can be calculated.
In the embodiment of the invention, the electric field distribution data is generated by acquiring the structural data and the actual altitude of the end fitting and calculating the electric field distribution of the structural data under a plurality of preset altitudes and a plurality of preset gap distances by adopting a finite element method. And performing a positive polarity operation impact discharge test based on the electric field distribution data to determine a streamer critical starting voltage and a hardware positive polarity operation impact discharge voltage. And respectively carrying out positive polarity operation impact test on the middle altitude corresponding to each preset altitude according to the critical starting voltage of the streamer, and generating a discharge voltage test value. And updating the initial hardware discharge voltage calculation model based on the hardware positive operation impulse discharge voltage and the discharge voltage test value, and generating a target hardware discharge voltage calculation model. Substituting the actual altitude into a target hardware discharge voltage calculation model to calculate the voltage, and generating the discharge voltage corresponding to the end hardware. The technical problems that the existing end fitting discharge voltage calculation method is to measure environmental parameters such as atmospheric pressure and temperature through a sensor, the sensor needs to be installed and maintained, the equipment cost is increased, and the operation complexity is high are solved. And calculating the critical starting voltage of the stream by finite element simulation, starting pressurization by using the critical starting voltage, and reducing test time and economic cost. The gap structure and the altitude factors are considered in the construction of the model, so that the discharge voltage of the end fitting is calculated more accurately.
Referring to fig. 2, fig. 2 is a flowchart illustrating a method for calculating a discharge voltage of an end fitting according to a second embodiment of the present invention.
The second embodiment of the present invention provides another method for calculating a discharge voltage of an end fitting, including:
step 201, obtaining structural data and actual altitude of an end fitting, calculating electric field distribution of the structural data at a plurality of preset altitudes and a plurality of preset gap distances by adopting a finite element method, and generating electric field distribution data.
In the embodiment of the present invention, the implementation process of step 201 is similar to that of step 101, and will not be repeated here.
Step 202, performing a positive polarity operation impact discharge test according to the electric field distribution data, and determining a streamer critical starting voltage and a hardware positive polarity operation impact discharge voltage.
Further, step 202 may include the following sub-steps S11-S12:
s11, substituting the electric field distribution data into a preset photoionization model to calculate a discharge streamer critical starting voltage value of the end fitting, and generating a streamer critical starting voltage.
And S12, pressurizing from the critical initial voltage of the stream injection to perform positive-polarity operation impulse discharge test on the test device corresponding to the end fitting, so as to generate positive-polarity operation impulse discharge voltage of the fitting.
In the embodiment of the invention, the test device is simulated according to the structural data to generate the test device. The test device is composed of a surge voltage generator 1, a corrugated pipe 2, an insulator 3, a crane 4, a three-hole voltage-equalizing ball 5, a test product 6 and a grounding pile 7, namely, the test arrangement is carried out as shown in fig. 3, corresponding simulation arrangement is carried out by adopting computing equipment, so that the test device is constructed, a bus connecting piece and an insulator 3 connecting piece are arranged in the corner ball, and the top end of the test device is vertically suspended by a composite suspension insulator 3. One end of the high-voltage lead is connected with the corner ball, and the other end is connected with the impulse voltage generator 1; the other bus is vertically arranged, the upper end of the bus is connected with the bottom end of the corner ball, and the other end of the bus is connected with the test sample 6. A galvanized iron plate is paved on the ground of the hall to simulate the ground. During the test, the impulse generator generates a standard positive polarity operating impulse voltage waveform to conduct the impulse test.
And calculating the discharge streamer threshold starting voltage value of the end fitting by utilizing a preset photoionization model and combining electric field distribution data, wherein the photoionization criterion is shown as follows, and when the following formula is equal to 1, the streamer threshold starting voltage can be obtained.
Wherein r is the radius of the electrode; r is (r) 1 Is the electron collapse head radius; z i Representing an ionospheric boundary, determined by α=η; alpha is the ionization coefficient; η is the adsorption coefficient; gamma ray ph Is the surface photoelectron emission coefficient; μ is the photon absorption coefficient; g (l) is a geometric factor.
The values of alpha, eta and mu in the above formula are related to the electric field intensity and the air density, and the calculation formula is as follows:
μ＝δμ 0 ；
wherein E is the space electric field intensity, kV/cm; delta is the relative density of air, and the calculation formula is:
wherein t represents the test ambient temperature; p represents the test ambient atmospheric pressure; p is p 0 Representing the standard atmospheric pressure.
In which the photon absorption coefficient mu is proportional to the relative density of air, mu 0 Is the photon absorption coefficient under standard atmospheric conditions.
And respectively pressurizing from the critical starting voltage of the stream flow at each altitude to perform a positive polarity operation impulse discharge test to obtain the positive polarity operation impulse discharge voltage of the hardware fitting.
And 203, respectively performing positive polarity operation impact tests on the middle altitude corresponding to each preset altitude according to the critical start voltage of the streamer, and generating a discharge voltage test value.
In the embodiment of the present invention, the specific implementation process of step 203 is similar to that of step 103, and will not be described herein.
And 204, selecting a gap distance discharge voltage corresponding to the hardware positive polarity operation impulse discharge voltage from a preset bar positive polarity operation impulse discharge voltage database, and generating the gap distance discharge voltage.
The preset panel positive polarity operation surge discharge voltage database refers to a database including panel positive polarity operation surge discharge voltage data at an altitude of 0 m.
The 50% operating impulse discharge voltage versus the bar-to-plate air gap at 0m altitude for different gap distances is shown in table 1.
TABLE 1 0 Positive polarity operation impact discharge Voltage control Table for the sea level rod-plate
In the embodiment of the invention, a gap distance discharge voltage corresponding to a preset positive polarity operation impact discharge voltage of a bar plate is selected from a positive polarity operation impact discharge voltage database hardware fitting, and the gap distance discharge voltage is generated.
And 205, substituting the gap distance discharge voltage and the hardware positive operation impulse discharge voltage into an initial hardware discharge voltage calculation model to calculate model parameters, and generating model parameters.
In the embodiment of the invention, a hardware fitting discharge voltage calculation model taking the 0m rod-plate discharge voltage as a reference and considering the altitude effect is established,wherein U is discharge voltage; u (U) 0 The positive polarity operation impulse discharge voltage of the lower rod plate at the altitude of 0m is expressed as kV; h is the altitude, and the unit of H is m; k (k) 1 Is of form factor, k 2 As an altitude factor, k 1 、k 2 Is dimensionless, e is 2.7183.
Substituting the corresponding gap distance discharge voltage of the hardware positive polarity operation impulse discharge voltage of each elevation point and the corresponding gap distance discharge voltage of the bar positive polarity operation impulse discharge voltage database under the elevation of 0m into a calculation model to determine the parameter k of the calculation model 1 、k 2 To obtain model parameters.
And 206, carrying out model updating on the initial hardware discharge voltage calculation model by adopting model parameters to generate an intermediate hardware discharge voltage calculation model.
In the embodiment of the invention, the model parameters obtained by calculation are used for carrying out model updating on the initial hardware discharge voltage calculation model, so that the middle hardware discharge voltage calculation model is obtained.
And 207, updating the model of the middle hardware discharge voltage calculation model according to the discharge voltage test value to generate a target hardware discharge voltage calculation model.
Further, step 207 may include the following substeps S21-S23:
s21, substituting the middle altitude corresponding to each preset altitude into the middle hardware discharge voltage calculation model to calculate the discharge voltage, and generating a discharge voltage calculation value.
S22, substituting the discharge voltage calculated value and the discharge voltage test value into a preset error calculation formula to perform error calculation, and generating a relative root mean square error.
The preset error calculation formula is:
wherein δ is the relative root mean square error; n represents the total number of intermediate altitudes; i takes the value of 1,2 and … … n; u (U) i The discharge voltage test value is the ith intermediate altitude; u's' i A discharge voltage calculation is performed for the ith intermediate altitude.
S23, updating the model of the middle hardware discharge voltage calculation model according to the relative root mean square error and the preset error threshold value, and generating a target hardware discharge voltage calculation model.
Further, step S23 may include the following substeps S231-S234:
s231, judging whether the relative root mean square error is larger than a preset error threshold value, if so, executing step S232, and if not, executing step S234.
S232, taking the average value of the discharge voltage calculated value and the discharge voltage test value as the corresponding operation impulse discharge voltage.
S233, substituting the operation impulse discharge voltage into the middle hardware discharge voltage calculation model to carry out model parameter correction, and generating a target hardware discharge voltage calculation model.
S234, taking the middle hardware discharge voltage calculation model as a target hardware discharge voltage calculation model.
The preset error threshold is 10%.
In the embodiment of the invention, the altitude is between the altitudesAnd calculating the intermediate altitude substituting calculation model, performing error calculation with the intermediate altitude test value to determine the effectiveness of the calculation model, and performing correction. Specifically, first, the middle altitude corresponding to each preset altitude is substituted into the middle hardware discharge voltage calculation model to calculate the discharge voltage, and a discharge voltage calculation value is generated. And substituting the discharge voltage calculated value and the discharge voltage test value into a preset error calculation formula to perform error calculation, so as to generate a relative root mean square error. And finally, updating the model of the middle hardware discharge voltage calculation model based on the relative root mean square error and a preset error threshold value to generate a target hardware discharge voltage calculation model. If the relative root mean square error is smaller than or equal to 10%, the calculation model is adopted, namely, the middle hardware discharge voltage calculation model is used as a target hardware discharge voltage calculation model. If the relative root mean square error is greater than 10%, the average value between the discharge voltage calculated value and the discharge voltage test value is used as 50% of the operation impulse discharge voltage at the gap distance to obtain a corrected shape factor k 1 And an altitude factor k 2 Substituting the target hardware fitting discharge voltage calculation model into the middle hardware fitting discharge voltage calculation model, and finally obtaining a corrected calculation model, namely the target hardware fitting discharge voltage calculation model.
And step 208, substituting the actual altitude into a target hardware discharge voltage calculation model to calculate the voltage, and generating the discharge voltage corresponding to the end hardware.
In the embodiment of the present invention, the implementation process of step 208 is similar to that of step 105, and will not be repeated here.
Specifically, as shown in fig. 3 and 4, an operation impact discharge test is performed on the equalizing ring with the diameter of 1.6m to the ground 3m vertically according to the steps, and a standard operation impact voltage is adopted for the test voltage waveform. And obtaining a characteristic curve graph of the discharge voltage U-altitude H of the 3m gap between the equalizing ring with the diameter of 1.6m and the ground.
As shown in fig. 3 and 5, the operation impact discharge test is performed on the equalizing ring with the diameter of 1.6m to the ground 4m vertically according to the steps, and the standard operation impact voltage is adopted as the test voltage waveform. And obtaining a characteristic curve graph of the discharge voltage U-altitude H of the gap of the equalizing ring with the diameter of 1.6m to the ground and the gap of 4 m.
As shown in fig. 3 and 6, the operation impact discharge test is performed on the equalizing ring with the ring diameter of 1.6m to the ground 6m vertically according to the steps, and the standard operation impact voltage is adopted as the test voltage waveform. And obtaining a characteristic curve graph of the discharge voltage U-altitude H of the gap of the equalizing ring with the diameter of 1.6m to the ground and the gap of 6 m.
As shown in fig. 3 and 7, an operation impact discharge test is performed on the equalizing ring with the diameter of 2.6m to the ground of 1.5m vertically according to the steps, and a standard operation impact voltage is adopted as a test voltage waveform. And obtaining a characteristic curve diagram of the gap discharge voltage U-altitude H of the equalizing ring with the diameter of 2.6m to the ground of 1.5m vertically.
Through the experiment, k can be calculated 1 ＝1.17～2.15，k 2 ＝0.53～0.88。
In the embodiment of the invention, the discharge voltage values under different altitudes can be calculated by establishing the discharge voltage calculation formulas corresponding to different gap types and gap distances, so that correction is realized. In the method, the photoionization criterion is combined with finite element simulation to calculate the critical starting voltage of the fluid injection, and the pressure is started to be increased by the critical starting voltage, so that the test time and the economic cost are reduced. For low altitude areas, the wand plate voltage is used as a correction reference value. The bar and plate voltage is a commonly and widely acquired data that can be obtained from operational records and test data of numerous converter station valve hall devices. Because the environmental conditions such as the atmospheric pressure and the temperature in the low-altitude area are stable compared with other areas, the bar plate voltage can be used as a reliable reference value for correction, and compared with the traditional correction method based on sensor measurement, the method has the advantages that no additional sensor equipment is required to be installed and maintained, and the bar plate voltage in the existing operation record and test data is used as a correction reference. Therefore, the problems of sensor cost and maintenance are avoided, the correction can be performed by using a wide data source, and the feasibility and universality of the calculation method are improved. The model is built based on a 0m altitude rod-plate gap discharge voltage database, and gap structure and altitude factors are considered, so that hardware discharge voltage calculation is more accurate. And calculating the critical starting voltage of the streamer by using photoionization criteria and combining finite element simulation, starting pressurizing by using the critical starting voltage, and reducing test time and economic cost. Based on the discharge voltage of the 0m rod-plate with richer and more stable data, the work of the 0m altitude test is reduced. The method meets the reference basis of safety and economy of design and installation of the hardware fittings at the end part of the valve hall equipment of the converter station in actual engineering, not only can accurately obtain the discharge voltage of various hardware fittings in high-altitude areas, but also reduces the workload and saves a large amount of cost.
Referring to fig. 8, fig. 8 is a block diagram illustrating a discharge voltage calculation system for an end fitting according to a third embodiment of the present invention.
The third embodiment of the present invention provides a discharge voltage calculation system for an end fitting, including:
the electric field distribution data generating module 801 is configured to obtain structural data and actual altitude of the end fitting, calculate electric field distribution of the structural data at a plurality of preset altitudes and a plurality of preset gap distances by using a finite element method, and generate electric field distribution data.
And the streamer critical starting voltage and hardware positive operation impulse discharge voltage determining module 802 is used for performing a positive operation impulse discharge test according to the electric field distribution data to determine the streamer critical starting voltage and the hardware positive operation impulse discharge voltage.
And the discharge voltage test value generation module 803 is used for respectively performing positive polarity operation impact tests on the middle altitude corresponding to each preset altitude according to the critical start voltage of the streamer, so as to generate a discharge voltage test value.
The target hardware discharge voltage calculation model generation module 804 is configured to perform model update on the initial hardware discharge voltage calculation model according to the hardware positive operation impulse discharge voltage and the discharge voltage test value, and generate a target hardware discharge voltage calculation model.
The discharge voltage generation module 805 is configured to substitute the actual altitude into the target hardware discharge voltage calculation model to perform voltage calculation, and generate a discharge voltage corresponding to the end hardware.
Optionally, the streamer threshold starting voltage and hardware positive polarity operation impact discharge voltage determining module 802 includes:
and the streamer critical starting voltage generation module is used for substituting the electric field distribution data into a preset photoionization model to calculate a discharge streamer critical starting voltage value of the end fitting, so as to generate streamer critical starting voltage.
The photoionization criteria corresponding to the preset photoionization model are as follows:
wherein r is the radius of the electrode; r is (r) 1 Is the electron collapse head radius; z i Representing an ionospheric boundary, determined by α=η; alpha is the ionization coefficient; η is the adsorption coefficient; gamma ray ph Is the surface photoelectron emission coefficient; μ is the photon absorption coefficient; g (l) is a geometric factor.
The hardware positive operation impulse discharge voltage generation module is used for performing positive operation impulse discharge test on the test device corresponding to the end hardware from the start of pressurizing of the critical start voltage of the stream, and generating hardware positive operation impulse discharge voltage.
Optionally, the target fitting discharge voltage calculation model generating module 804 includes:
The gap distance discharge voltage generation module is used for selecting a gap distance discharge voltage corresponding to the hardware positive polarity operation impulse discharge voltage from a preset bar positive polarity operation impulse discharge voltage database to generate the gap distance discharge voltage.
The model parameter generation module is used for substituting the gap distance discharge voltage and the hardware positive operation impulse discharge voltage into an initial hardware discharge voltage calculation model to perform model parameter calculation, so as to generate model parameters.
The initial hardware discharge voltage calculation model is as follows:
wherein U is discharge voltage; u (U) 0 Positive polarity operating shock for altitude 0m lower slateDischarge voltage in kV; h is the altitude, and the unit of H is m; k (k) 1 Is of form factor, k 2 As an altitude factor, k 1 、k 2 Taking 2.7183 in a dimensionless manner;
the middle hardware discharge voltage calculation model generation module is used for carrying out model updating on the initial hardware discharge voltage calculation model by adopting model parameters to generate a middle hardware discharge voltage calculation model.
And the target hardware discharge voltage calculation model generation submodule is used for carrying out model updating on the intermediate hardware discharge voltage calculation model according to the discharge voltage test value to generate a target hardware discharge voltage calculation model.
Optionally, the target fitting discharge voltage calculation model generation sub-module may perform the steps of:
substituting the middle altitude corresponding to each preset altitude into a middle hardware fitting discharge voltage calculation model to calculate the discharge voltage, and generating a discharge voltage calculation value;
substituting the discharge voltage calculated value and the discharge voltage test value into a preset error calculation formula to perform error calculation, and generating a relative root mean square error;
the preset error calculation formula is:
wherein δ is the relative root mean square error; n represents the total number of intermediate altitudes; i takes the value of 1,2 and … … n; u (U) i The discharge voltage test value is the ith intermediate altitude; u's' i A discharge voltage calculation value for the i-th intermediate altitude;
and updating the model of the middle hardware discharge voltage calculation model according to the relative root mean square error and the preset error threshold value to generate a target hardware discharge voltage calculation model.
Optionally, the target fitting discharge voltage calculation model generation sub-module may further perform the steps of:
judging whether the relative root mean square error is larger than a preset error threshold value or not;
if so, taking the average value of the discharge voltage calculated value and the discharge voltage test value as the corresponding operation impulse discharge voltage;
Substituting the operation impulse discharge voltage into the middle hardware discharge voltage calculation model to carry out model parameter correction, and generating a target hardware discharge voltage calculation model;
if not, taking the middle hardware discharge voltage calculation model as a target hardware discharge voltage calculation model.
The embodiment of the invention also provides electronic equipment, which comprises: a memory and a processor, the memory storing a computer program; the computer program, when executed by a processor, causes the processor to perform the end fitting discharge voltage calculation method of any of the embodiments described above.
The memory may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. The memory has memory space for program code to perform any of the method steps described above. For example, the memory space for the program code may include individual program code for implementing the various steps in the above method, respectively. The program code can be read from or written to one or more computer program products. These computer program products comprise a program code carrier such as a hard disk, a Compact Disc (CD), a memory card or a floppy disk. The program code may be compressed, for example, in a suitable form. These codes, when executed by the computing processing device, cause the computing processing device to perform the respective steps in the end fitting discharge voltage calculation method described above.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the end fitting discharge voltage calculation method according to any of the embodiments above.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The end fitting discharge voltage calculating method is characterized by comprising the following steps of:
acquiring structural data and actual altitude of an end fitting, calculating electric field distribution of the structural data at a plurality of preset altitudes and a plurality of preset gap distances by adopting a finite element method, and generating electric field distribution data;
performing a positive-polarity operation impulse discharge test according to the electric field distribution data to determine a streamer critical starting voltage and a hardware positive-polarity operation impulse discharge voltage;
respectively performing positive polarity operation impact tests on the middle altitude corresponding to each preset altitude according to the streamer critical starting voltage to generate a discharge voltage test value;
According to the hardware positive polarity operation impulse discharge voltage and the discharge voltage test value, performing model updating on an initial hardware discharge voltage calculation model to generate a target hardware discharge voltage calculation model;
substituting the actual altitude into the target hardware discharge voltage calculation model to calculate the voltage, and generating the discharge voltage corresponding to the end hardware.
2. The method of claim 1, wherein the step of determining the streamer critical initiation voltage and the hardware positive polarity operation impact discharge voltage by performing a positive polarity operation impact discharge test based on the electric field distribution data comprises:
substituting the electric field distribution data into a preset photoionization model to calculate a discharge streamer critical starting voltage value of the end fitting, and generating a streamer critical starting voltage;
the photoionization criterion corresponding to the preset photoionization model is as follows:
wherein r is the radius of the electrode; r is (r) 1 Is the electron collapse head radius; z i Representing an ionospheric boundary, determined by α=η; alpha is the ionization coefficient; η is the adsorption coefficient; gamma ray ph Is the surface photoelectron emission coefficient; μ is the photon absorption coefficient; g (l) is a geometric factor;
And pressurizing from the critical start voltage of the stream to perform positive-polarity operation impulse discharge test on the test device corresponding to the end fitting, so as to generate the positive-polarity operation impulse discharge voltage of the fitting.
3. The method of calculating a discharge voltage of an end fitting according to claim 1, wherein the step of model-updating an initial fitting discharge voltage calculation model according to the positive operation impact discharge voltage of the fitting and the discharge voltage test value to generate a target fitting discharge voltage calculation model comprises:
selecting a gap distance discharge voltage corresponding to the hardware positive polarity operation impulse discharge voltage from a preset bar positive polarity operation impulse discharge voltage database, and generating a gap distance discharge voltage;
substituting the gap distance discharge voltage and the hardware positive polarity operation impulse discharge voltage into an initial hardware discharge voltage calculation model to calculate model parameters, and generating model parameters;
the initial hardware discharge voltage calculation model is as follows:
wherein U is discharge voltage; u (U) 0 The positive polarity operation impulse discharge voltage of the lower rod plate at the altitude of 0m is expressed as kV; h is the altitude, and the unit of H is m; k (k) 1 Is of form factor, k 2 As an altitude factor, k 1 、k 2 Taking 2.7183 in a dimensionless manner;
performing model updating on the initial hardware discharge voltage calculation model by adopting the model parameters to generate an intermediate hardware discharge voltage calculation model;
and carrying out model updating on the middle hardware fitting discharge voltage calculation model according to the discharge voltage test value to generate a target hardware fitting discharge voltage calculation model.
4. The method of calculating a discharge voltage of an end fitting according to claim 3, wherein the step of model-updating the intermediate fitting discharge voltage calculation model according to the discharge voltage test value to generate a target fitting discharge voltage calculation model comprises:
substituting the middle altitude corresponding to each preset altitude into the middle hardware fitting discharge voltage calculation model to calculate the discharge voltage, and generating a discharge voltage calculation value;
substituting the discharge voltage calculated value and the discharge voltage test value into a preset error calculation formula to perform error calculation, and generating a relative root mean square error;
the preset error calculation formula is as follows:
wherein δ is the relative root mean square error; n represents the total number of intermediate altitudes; i takes the value of 1,2 and … … n; u (U) i Is the firsti discharge voltage test values of the intermediate altitude; u (U) i ' is the discharge voltage calculation for the ith intermediate altitude;
and updating the model of the middle hardware discharge voltage calculation model according to the relative root mean square error and a preset error threshold value to generate a target hardware discharge voltage calculation model.
5. The method of claim 4, wherein the step of updating the model of the middle hardware discharge voltage calculation model according to the relative root mean square error and a preset error threshold value to generate a target hardware discharge voltage calculation model comprises:
judging whether the relative root mean square error is larger than a preset error threshold value or not;
if yes, taking the average value of the discharge voltage calculated value and the discharge voltage test value as the corresponding operation impulse discharge voltage;
substituting the operation impulse discharge voltage into the middle hardware discharge voltage calculation model to carry out model parameter correction, and generating a target hardware discharge voltage calculation model;
and if not, taking the middle hardware discharge voltage calculation model as the target hardware discharge voltage calculation model.
6. An end fitting discharge voltage calculation system, comprising:
The electric field distribution data generation module is used for acquiring the structural data and the actual altitude of the end fitting, calculating the electric field distribution of the structural data under a plurality of preset altitudes and a plurality of preset gap distances by adopting a finite element method, and generating electric field distribution data;
the critical start voltage of the current and the positive polarity operation impulse discharge voltage of the hardware fitting are determined by the positive polarity operation impulse discharge test according to the electric field distribution data;
the discharge voltage test value generation module is used for respectively carrying out positive polarity operation impact tests on the middle altitude corresponding to each preset altitude according to the streamer critical starting voltage to generate a discharge voltage test value;
the target hardware discharge voltage calculation model generation module is used for carrying out model updating on the initial hardware discharge voltage calculation model according to the hardware positive polarity operation impulse discharge voltage and the discharge voltage test value to generate a target hardware discharge voltage calculation model;
and the discharge voltage generation module is used for substituting the actual altitude into the target hardware fitting discharge voltage calculation model to perform voltage calculation and generate the discharge voltage corresponding to the end hardware fitting.
7. The end fitting discharge voltage calculation system of claim 6, wherein the streamer critical initiation voltage and fitting positive polarity operation surge discharge voltage determination module comprises:
the streamer critical starting voltage generation module is used for substituting the electric field distribution data into a preset photoionization model to calculate a discharge streamer critical starting voltage value of the end fitting, so as to generate streamer critical starting voltage;
the photoionization criterion corresponding to the preset photoionization model is as follows:
wherein r is the radius of the electrode; r is (r) 1 Is the electron collapse head radius; z i Representing an ionospheric boundary, determined by α=η; alpha is the ionization coefficient; η is the adsorption coefficient; gamma ray ph Is the surface photoelectron emission coefficient; μ is the photon absorption coefficient; g (l) is a geometric factor;
and the hardware positive operation impulse discharge voltage generation module is used for performing positive operation impulse discharge test on the test device corresponding to the end hardware from the streaming threshold starting voltage to generate hardware positive operation impulse discharge voltage.
8. The end fitting discharge voltage calculation system of claim 6, wherein the target fitting discharge voltage calculation model generation module comprises:
The gap distance discharge voltage generation module is used for selecting a gap distance discharge voltage corresponding to the hardware positive polarity operation impulse discharge voltage from a preset bar positive polarity operation impulse discharge voltage database to generate a gap distance discharge voltage;
the model parameter generation module is used for substituting the gap distance discharge voltage and the hardware positive polarity operation impulse discharge voltage into an initial hardware discharge voltage calculation model to perform model parameter calculation, so as to generate model parameters;
the initial hardware discharge voltage calculation model is as follows:
wherein U is discharge voltage; u (U) 0 The positive polarity operation impulse discharge voltage of the lower rod plate at the altitude of 0m is expressed as kV; h is the altitude, and the unit of H is m; k (k) 1 Is of form factor, k 2 As an altitude factor, k 1 、k 2 Taking 2.7183 in a dimensionless manner;
the middle hardware discharge voltage calculation model generation module is used for carrying out model updating on the initial hardware discharge voltage calculation model by adopting the model parameters to generate a middle hardware discharge voltage calculation model;
and the target hardware discharge voltage calculation model generation submodule is used for carrying out model updating on the middle hardware discharge voltage calculation model according to the discharge voltage test value to generate a target hardware discharge voltage calculation model.
9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program that, when executed by the processor, causes the processor to perform the steps of the end fitting discharge voltage calculation method according to any one of claims 1 to 5.
10. A computer-readable storage medium having stored thereon a computer program, wherein the computer program when executed implements the end fitting discharge voltage calculation method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311592250.4A CN117574726A (en) | 2023-11-24 | 2023-11-24 | Method, system, equipment and medium for calculating discharge voltage of end fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311592250.4A CN117574726A (en) | 2023-11-24 | 2023-11-24 | Method, system, equipment and medium for calculating discharge voltage of end fitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117574726A true CN117574726A (en) | 2024-02-20 |
Family
ID=89895195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311592250.4A Pending CN117574726A (en) | 2023-11-24 | 2023-11-24 | Method, system, equipment and medium for calculating discharge voltage of end fitting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117574726A (en) |
-
2023
- 2023-11-24 CN CN202311592250.4A patent/CN117574726A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108897951B (en) | Lightning arrester nonlinear volt-ampere characteristic 'turning point' and 'bending coefficient' fitting method thereof | |
| CN110675712B (en) | Power cable oscillatory wave partial discharge detection practical training system | |
| CN103605042B (en) | Fault Diagnosis for Grounding Grids method based on APSO algorithm | |
| CN103344934B (en) | The detection check method and system of Partial Discharge in Power Transformer sonac | |
| CN105372531A (en) | Transformer insulation thermal aging parameter correlation calculation method based on Weibull distribution model | |
| CN113589063B (en) | Lightning arrester valve plate pressure-sensitive characteristic evaluation system and method under multiple lightning strike actions | |
| CN112904116A (en) | System and method for evaluating dynamic characteristics of valve plate of lightning arrester under action of impact current | |
| CN112149549A (en) | GIS partial discharge type identification method based on depth residual error network | |
| CN107942156A (en) | Composite insulator aging assessment under the conditions of jump in temperature | |
| CN111507034A (en) | Method and system for calculating time-varying characteristic of lightning arrester temperature field under impact load | |
| Taniguchi et al. | Flashover characteristics of long air gaps with negative switching impulses | |
| CN117574726A (en) | Method, system, equipment and medium for calculating discharge voltage of end fitting | |
| CN114660387A (en) | Lightning arrester monitoring method based on leakage current sensor and BP neural network algorithm | |
| CN108828292B (en) | Zinc oxide arrester resistive current online monitoring method considering influence of grounding bar | |
| CN104316850A (en) | Method for correcting corona discharge voltage of alternating-current line hardware | |
| CN109752614A (en) | A kind of arrester measurement method of parameters and system | |
| CN105137265A (en) | Insulator leakage current prediction method | |
| CN108120890A (en) | A kind of parallel resistance piece column current location mode | |
| CN110968935B (en) | Algorithm for maximum jumping height of deicing of transmission line with random height difference | |
| JP2002296213A (en) | Corrosion evaluation method and database | |
| CN108896947B (en) | On-site calibration method and transient voltage measurement method of converter station direct current field transient voltage non-contact measurement device | |
| CN113514736B (en) | Method for determining creepage ratio distance of 27.5KV traction system tunnel insulator in high-altitude area | |
| CN113267704B (en) | Lightning arrester performance detection method and device, computer equipment and storage medium | |
| CN115684855A (en) | Electric power equipment internal insulation defect discharge quantity quantification method and system based on twin model | |
| CN114970259A (en) | Converter transformer modeling method, converter transformer modeling device, converter transformer modeling apparatus, storage medium, and program product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |