CN115508603A - Tower structure parameter inversion method adopting space electric field fixed point integral - Google Patents
Tower structure parameter inversion method adopting space electric field fixed point integral Download PDFInfo
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- CN115508603A CN115508603A CN202211227996.0A CN202211227996A CN115508603A CN 115508603 A CN115508603 A CN 115508603A CN 202211227996 A CN202211227996 A CN 202211227996A CN 115508603 A CN115508603 A CN 115508603A
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- 230000005684 electric field Effects 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000012212 insulator Substances 0.000 claims abstract description 49
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims abstract description 4
- 230000010354 integration Effects 0.000 claims description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 7
- 239000000741 silica gel Substances 0.000 claims description 7
- 229910002027 silica gel Inorganic materials 0.000 claims description 7
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 2
- 229920002379 silicone rubber Polymers 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 239000004945 silicone rubber Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0892—Details related to signal analysis or treatment; presenting results, e.g. displays; measuring specific signal features other than field strength, e.g. polarisation, field modes, phase, envelope, maximum value
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- 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
- G06F17/11—Complex mathematical operations for solving equations, e.g. nonlinear equations, general mathematical optimization problems
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Abstract
The invention relates to the technical field of transmission tower measurement data processing, in particular to a tower structure parameter inversion method adopting space electric field fixed point integral, which comprises the following steps: judging the structure type of the tower insulator, if the structure type of the tower insulator is judged to be the first type, determining an integral path of the tower insulator, selecting a first set number of sensors to be arranged on the tower insulator, and executing the next step; if the structure type of the tower insulator is judged to be the second type, determining an integral path of the tower insulator, selecting a second set number of sensors to be arranged on the tower insulator, and executing the next step; and acquiring electric field change data of the tower, performing inversion calculation based on the structure type of the tower to obtain the voltage value of the tower, and completing the inversion calculation of the voltage value of the transmission tower.
Description
Technical Field
The invention relates to the technical field of transmission tower measurement data processing, in particular to a tower structure parameter inversion method adopting space electric field fixed point integral.
Background
For the moment, voltage measurement is the most important and fundamental measurement content in grid sensing measurement. At the present stage, the monitoring of the electric energy state of the transmission and distribution side is mainly concentrated in a transformer substation, and in contrast, the difficulty of monitoring the voltage of a transmission tower is very high, and measurement and calculation are usually performed under the condition of contacting with the high voltage at the primary side of a transmission line, so that the installation difficulty of a sensor is high, and the installation safety of the sensor cannot be guaranteed; in addition, due to the fact that the tower structure is complex, the problem of solving the over-determined equation set is involved in the inverse problem calculation process of reversely calculating the field source parameters after electric field signals around the complex electromagnetic field are obtained, and therefore the problem of solving the inverse problem of the lead voltage is very difficult. Based on the above, in order to solve the above problems, a pole tower structure parameter inversion method adopting space electric field fixed point integration is designed.
Disclosure of Invention
The invention aims to provide a tower structure parameter inversion method adopting space electric field fixed point integral, which is used for solving the technical problem.
The embodiment of the invention is realized by the following technical scheme:
a tower structure parameter inversion method adopting space electric field fixed point integral comprises the following steps:
judging the structure type of the tower insulator, if the structure type of the tower insulator is judged to be the first type, determining an integral path of the tower insulator, selecting a first set number of sensors to be arranged on the tower insulator, and executing the next step; if the structure type of the tower insulator is judged to be the second type, determining an integral path of the tower insulator, selecting a second set number of sensors to be arranged on the tower insulator, and executing the next step;
and acquiring electric field change data of the tower, performing inversion calculation based on the structure type of the tower to obtain the voltage value of the tower, and completing the inversion calculation of the voltage value of the transmission tower.
Optionally, the tower insulator has two specific structure types.
Optionally, the structure types of the pole tower insulator include a glass insulator and a silica gel insulator, the glass insulator is the first structure type, and the silica gel insulator is the second structure type.
Optionally, the inversion calculation specifically uses a gaussian-legendre integral.
Optionally, the sensor is specifically an electric field sensor.
The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:
according to the embodiment, the structure of the transmission tower is subjected to inversion calculation, and the voltage value of the transmission tower can be measured through inversion calculation of the structure of the tower by measuring the change of an electric field at one side of the structure of the transmission tower without contacting the high voltage at the primary side of the transmission line, so that the installation process and the difficulty of a tower sensor are greatly simplified, and the installation safety of the sensor is improved; moreover, inversion calculation is carried out through Gaussian-Legendre integration, calculation is faster compared with the inverse problem, and meanwhile the requirement of measurement accuracy of the voltage of the transmission tower can be met under most conditions.
Drawings
Fig. 1 is a schematic flow diagram of a pole tower structure parameter inversion method using space electric field fixed point integration according to the present invention;
FIG. 2 is a schematic view of an integration path of a glass insulator according to the present invention;
fig. 3 is a schematic diagram of an integral path of a silica gel insulator according to the present invention;
fig. 4 is a schematic diagram of the electric field distribution after the irregular part is cut off.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
As shown in fig. 1, the present invention provides one of the embodiments: a tower structure parameter inversion method adopting space electric field fixed point integral comprises the following steps:
judging the structure type of a pole tower insulator, selecting Gaussian Legendre integral under a 4-sensor as an integral scheme when the pole tower insulator is a glass insulator and the integral path of the pole tower glass insulator is shown in figure 2, and arranging an electric field sensor on the pole tower insulator to perform inversion by adopting the Gaussian Legendre integral; when the insulator of the tower is a silica gel insulator, see fig. 3, and the silica gel insulator is selected as an integral path in the tension tower, the Gaussian Legendre integral under the 5 sensor is selected as an integral scheme, and the electric field sensor is arranged on the insulator of the tower to perform inversion by adopting the Gaussian Legendre integral.
In this embodiment, the fundamental principle of the electric field inversion voltage is shown as follows:
wherein, U bc The potential difference between the point b and the point a is shown, and the minus sign before integration shows that the direction of the electric field intensity is opposite to the direction of the voltage rise. E represents the value of the electric field along the integration path. The superposition of the integral equation approximately equal to N discrete points is the description of integral physical meaning, and the larger N is, the smaller the error after the dispersion is. With this inversion scheme, only a certain number of sensors need to be placed on the electric field integration path.
Based on the numerical integration scheme of the above integration method inversion, the gaussian-legendre integration is adopted in the present embodiment.
In the present embodiment, the integration scheme is a gaussian-legendre integral, i.e., a gaussian integral variant, and is a special gaussian integral in the case where the weight function in the gaussian integral is set to ρ (x) =1 and the integration interval is changed to [ -1,1], such as the following formula, where the weight and position are determined using a legendre polynomial having an orthogonal property.
Wherein the legendre polynomial for solving the weights and the integral node locations in the gaussian-legendre integral is shown as follows:
when the integral constants under the N integral nodes are solved, the zero points corresponding to the N-order Legendre polynomial are corresponding integral nodes. Since the gaussian legendre integral range can only be [ -1,1], and the actual electric field integral range is [ a, b ], the original integral object dx needs to be converted, and the conversion formula is as follows:
and putting the Gaussian Legendre integral formula into an actual integral formula of the electric field solving voltage to obtain the Gaussian Legendre integral formula for the electric field inversion voltage as follows:
the actual gaussian-legendre polynomial integral node locations and weights can be found as shown in table 1. In practice, when the electric field inversion voltage is performed, the number of integration nodes is determined, and then the corresponding electric field sensor placement position is determined according to table 1 for inversion.
TABLE 1
As shown in fig. 4, this embodiment further provides an application example, in which a voltage-electric field distribution curve on the silicone rubber insulator is obtained through calculation, and irregular parts in the voltage-electric field distribution curve are removed, as shown in the following diagram. After the irregular part is deleted, the voltage difference between the two ends of the integration path is 666090V, the voltage is used as an inversion reference voltage value, and the integration length is 14385mm.
In this application example, based on comparison, chebyshev integral inversion was performed on the silicone rubber insulator integration path in the case of 3 sensors, 4 sensors, and 5 sensors, respectively, as shown in tables 2, 3, and 4.
TABLE 2
TABLE 3
TABLE 4
The accuracy is obviously improved under the condition that the number of sensors is increased for the Chebyshev integral on the silicon rubber insulator. Further, in the case of sensors 3, 4, and 5, the gaussian legendre integrals were performed as shown in tables 5, 6, and 7.
TABLE 5
TABLE 6
TABLE 7
It can be analyzed from the above table that, under the condition that the silicone rubber insulator is used as an integral path for inversion, the gaussian legendre integral precision is higher than the chebyshev integral precision. Therefore, when the tension tower selects a silicon rubber insulator as an integral path, the Gaussian Legendre integral under a sensor of 5 is selected as an optimal integral scheme, and the effectiveness of the invention is proved.
The present invention has been described in terms of the preferred embodiment, and it is not intended to be limited to the embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A tower structure parameter inversion method adopting space electric field fixed point integral is characterized by comprising the following steps:
judging the structure type of the pole tower insulator, if the structure type of the pole tower insulator is judged to be the first type, determining an integral path of the pole tower insulator, selecting a first set number of sensors to be arranged on the pole tower insulator, and executing the next step; if the structure type of the tower insulator is judged to be the second type, determining an integral path of the tower insulator, selecting a second set number of sensors to be arranged on the tower insulator, and executing the next step;
and acquiring electric field change data of the tower, performing inversion calculation based on the structure type of the tower to obtain the voltage value of the tower, and completing the inversion calculation of the voltage value of the transmission tower.
2. The pole tower structure parameter inversion method adopting space electric field fixed point integration according to claim 1, wherein two types of pole tower insulators are specifically adopted.
3. The pole tower structure parameter inversion method adopting space electric field fixed point integral as claimed in claim 2, wherein the structure types of the pole tower insulators comprise glass insulators and silica gel insulators, the glass insulators are of the first structure type, and the silica gel insulators are of the second structure type.
4. The tower structure parameter inversion method adopting space electric field fixed point integration according to claim 1, characterized in that the inversion calculation specifically adopts Gaussian-Legendre integration.
5. The pole tower structure parameter inversion method adopting space electric field fixed point integration according to claim 1, wherein the sensor is specifically an electric field sensor.
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| CN202211227996.0A CN115508603A (en) | 2022-10-09 | 2022-10-09 | Tower structure parameter inversion method adopting space electric field fixed point integral |
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| CN202211227996.0A CN115508603A (en) | 2022-10-09 | 2022-10-09 | Tower structure parameter inversion method adopting space electric field fixed point integral |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103650A (en) * | 2011-03-25 | 2011-06-22 | 江苏南大先腾信息产业有限公司 | Three-dimensional simulation arrangement-along construction method for power transmission line |
| CN102694352A (en) * | 2012-06-07 | 2012-09-26 | 甘肃省电力公司电力科学研究院 | Method for improving insulator potential distribution in overhead power transmission line |
| CN104361168A (en) * | 2014-11-12 | 2015-02-18 | 国家电网公司 | Method for simulating electric field of 500kV alternating-current straight line tower |
| CN105425054A (en) * | 2015-12-24 | 2016-03-23 | 国网重庆市电力公司电力科学研究院 | Noncontact potential measurement method and device |
| CN107543953A (en) * | 2017-09-18 | 2018-01-05 | 重庆大学 | The phases line voltage detection method of transmission line of electricity based on modified Gauss Legendre integration |
| CN108387772A (en) * | 2018-03-08 | 2018-08-10 | 清华大学 | A kind of measurement method of transmission line of electricity overvoltage |
| CN112285495A (en) * | 2020-09-21 | 2021-01-29 | 国网辽宁省电力有限公司营口供电公司 | Electric field distribution based method for judging deterioration of insulator of power transmission line |
-
2022
- 2022-10-09 CN CN202211227996.0A patent/CN115508603A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103650A (en) * | 2011-03-25 | 2011-06-22 | 江苏南大先腾信息产业有限公司 | Three-dimensional simulation arrangement-along construction method for power transmission line |
| CN102694352A (en) * | 2012-06-07 | 2012-09-26 | 甘肃省电力公司电力科学研究院 | Method for improving insulator potential distribution in overhead power transmission line |
| CN104361168A (en) * | 2014-11-12 | 2015-02-18 | 国家电网公司 | Method for simulating electric field of 500kV alternating-current straight line tower |
| CN105425054A (en) * | 2015-12-24 | 2016-03-23 | 国网重庆市电力公司电力科学研究院 | Noncontact potential measurement method and device |
| CN107543953A (en) * | 2017-09-18 | 2018-01-05 | 重庆大学 | The phases line voltage detection method of transmission line of electricity based on modified Gauss Legendre integration |
| CN108387772A (en) * | 2018-03-08 | 2018-08-10 | 清华大学 | A kind of measurement method of transmission line of electricity overvoltage |
| CN112285495A (en) * | 2020-09-21 | 2021-01-29 | 国网辽宁省电力有限公司营口供电公司 | Electric field distribution based method for judging deterioration of insulator of power transmission line |
Non-Patent Citations (1)
| Title |
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| 周仿荣: "不同类型绝缘子在鸟粪影响下电场分布的仿真分析及防范建议", Retrieved from the Internet <URL:https://wwww.doc88.com/p-01899558913557.html> * |
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