CN113740646A - State evaluation method for power transmission and distribution line lightning arresters - Google Patents
State evaluation method for power transmission and distribution line lightning arresters Download PDFInfo
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- CN113740646A CN113740646A CN202111004727.3A CN202111004727A CN113740646A CN 113740646 A CN113740646 A CN 113740646A CN 202111004727 A CN202111004727 A CN 202111004727A CN 113740646 A CN113740646 A CN 113740646A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 22
- 238000011156 evaluation Methods 0.000 title claims abstract description 13
- 238000012544 monitoring process Methods 0.000 claims abstract description 32
- 238000013523 data management Methods 0.000 claims abstract description 15
- 230000002159 abnormal effect Effects 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 12
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- 230000007613 environmental effect Effects 0.000 claims description 4
- 239000011787 zinc oxide Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 3
- 238000013210 evaluation model Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 9
- 230000006866 deterioration Effects 0.000 abstract description 8
- 208000025274 Lightning injury Diseases 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009422 external insulation Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000013439 planning Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011158 quantitative evaluation Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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Abstract
The invention discloses a state evaluation method of power transmission and distribution line arresters, which comprises the following steps: firstly, installing a plurality of lightning arrester monitoring terminals on lightning arresters of a power transmission and distribution line, acquiring the total information of the lightning arresters and feeding back the acquired total information to an online data management system; the online data management system is used for receiving the full information of the lightning arrester, analyzing and processing the full information and judging whether the voltage, the current and the resistance value of the lightning arrester exceed the limits or not; and finally, the online data management system sends the analyzed and processed data to a remote early warning system, and the remote early warning system actively warns the lightning arrester with the abnormal fault. The lightning arrester deterioration monitoring system monitors the deterioration degree of the lightning arrester in real time, and once the lightning arrester is deteriorated, the system carries out early warning and alarming on the deterioration degree of the lightning arrester in time to inform maintenance personnel to carry out maintenance, so that the damage of rear-end equipment caused by the damage of the lightning arrester is avoided.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a state evaluation method for lightning arresters of a power transmission and distribution line.
Background
Every year, thunderstorm weather often causes great damage to industries, civilian use, national defense departments and the like along with disaster weather such as rainstorm, strong wind, hail and the like, particularly has serious damage to a power supply system and electricity, and even can cause power failure, fire disasters and the like.
The average altitude of the Tibet area is 4000 meters, the air density of the high altitude area is low, the temperature change is large, the air insulation strength is weakened, the heat dissipation condition is poor, if the altitude exceeds 5000 meters, the altitude is 1000 meters per liter, the air average air pressure is reduced by 7-10kPa, the external insulation strength is reduced by 8% -13%, and the external insulation strength, the heat dissipation and the like of a circuit or a transformer substation for installing the lightning arrester are greatly adversely affected, so that the operating environment of the lightning arrester in the Tibet area is high in severity and many in potential safety hazards compared with the plain area. In recent years, sudden failures of lightning arresters in Tibet regions occur in the operation process, economic loss and social influence caused by the failures are increasingly large, and the failures and potential safety hazards of the lightning arresters cannot be found in time in conventional periodic prevention tests.
In most cases, when a lightning stroke event occurs, equipment such as a lightning arrester and the like are damaged, but the real damage reason is not known, and the problem can be solved only by replacing the equipment. Because the fundamental problem is not solved, the last process can be repeated when the lightning stroke is suffered next time, and continuous direct or indirect economic loss is caused. Because the lightning protection equipment cannot be monitored comprehensively on line, whether the lightning protection equipment plays a good role or not is difficult to judge through a scientific technical means after lightning strike occurs, and whether the lightning protection equipment is damaged or not and the performance of the lightning protection equipment cannot be monitored in time. Therefore, a need exists in the art for a method for evaluating the state of an arrester of a power transmission and distribution line, which can realize online monitoring and evaluation of the operating state of the arrester and abnormal fault early warning, quickly and efficiently judge the operating state of the arrester, and avoid the deterioration of the arrester.
Disclosure of Invention
The invention aims to provide a state evaluation method of an arrester of a power transmission and distribution line, which realizes online monitoring evaluation and abnormal fault early warning of the operation state of the arrester, quickly and efficiently judges the working state of the arrester and avoids the phenomenon of deterioration of the arrester.
In order to achieve the purpose, the invention provides the following technical scheme:
a state evaluation method for lightning arresters of a power transmission and distribution line comprises the following steps:
s1, installing a plurality of lightning arrester monitoring terminals on the lightning arresters of the power transmission and distribution line, collecting the total information of the lightning arresters and feeding the collected total information back to the online data management system;
step S2, the online data management system is used for receiving the full information of the lightning arrester, analyzing and processing the full information, and judging whether the voltage, the current and the resistance value of the lightning arrester exceed the limit;
and step S3, the online data management system sends the analyzed and processed data to a remote early warning system, and the remote early warning system actively warns the lightning arrester with the abnormal fault.
Preferably, in step S1, the total information of the lightning arrester includes resistive current, leakage current, lightning strike frequency, environmental parameters, and geographic coordinate information of the lightning arrester.
Preferably, in step S1, the lightning arrester is a zinc oxide lightning arrester.
Preferably, in step S1, the lightning arrester monitoring terminal includes a data acquisition unit, a multi-energy complementary energy supply unit, a positioning unit and a wireless communication unit, which are connected in sequence.
Preferably, in step S2, the online data management system further includes a data backup module, where the data backup module is connected to the lightning arrester monitoring terminal and performs primary backup on the original data collected by the lightning arrester monitoring terminal.
Preferably, in step S3, the remote early warning system sends the early warning signal to the staff through a GSM short message or an APP tool.
Preferably, in step S3, the remote early warning system establishes an arrester state evaluation model with multiple data sources for each arrester monitoring terminal.
Compared with the prior art, the invention has the beneficial effects that:
(1) the online monitoring evaluation and abnormal fault early warning of the operating state of the arrester are realized by real-time, accurate and comprehensive acquisition of the operating condition of the arrester, the investment of manpower and material resources is optimized, the labor intensity is reduced, and the equipment investment and the comprehensive maintenance cost are reduced;
(2) monitoring the deterioration degree of the arrester in real time, and once the arrester is deteriorated, timely early warning and alarming are carried out on the deterioration degree of the arrester by a system to inform maintenance personnel to carry out maintenance so as to avoid the damage of rear-end equipment caused by the damage of the arrester;
(3) by mastering the thunder and lightning stroke rules, the lightning protection system can prevent or reduce the disaster caused by the thunder and lightning, improve the comprehensive capacity of defending the thunder and lightning disaster, provide important data support for the fixed-point and quantitative planning and designing work for installing the lightning arrester of the power grid line, optimize the equipment installation and deployment, reduce the unnecessary investment and have good popularization and application values.
Drawings
Fig. 1 is a flow chart of a state evaluation method of the lightning arresters of the power transmission and distribution line in the invention.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Referring to fig. 1, a method for evaluating the status of the lightning arresters of the power transmission and distribution line includes the following steps:
and S1, installing a plurality of lightning arrester monitoring terminals on the lightning arresters of the power transmission and distribution line, collecting the total information of the lightning arresters and feeding the collected total information back to the online data management system.
In step S1, the full information of the arrester includes resistive current, leakage current, lightning strike action frequency, environmental parameters, and geographical coordinate information of the arrester; the arrester is preferably a zinc oxide arrester.
The zinc oxide arrester is called MOA for short, and has various MOA detection methods, and basically eliminates or reduces the interference of interphase capacitance current and the interference of factors such as harmonic voltage, PT phase shift and the like on the basis of detecting leakage current, so that the detected resistive current is necessary to reflect the operating condition of each phase of MOA more truly.
The lightning arrester monitoring terminal comprises a data acquisition unit, a multi-energy complementary energy supply unit, a positioning unit and a wireless communication unit which are sequentially connected. The lightning arrester monitoring terminal is a high-precision full-quantity acquisition intelligent monitoring terminal and has full-quantity information acquisition and monitoring functions of lightning arrester resistive current, leakage current, lightning-fall action times, environmental parameters and the like.
In view of the microampere-level leakage current amplitude of the power transmission line, the influence of the measurement of the surrounding electromagnetic environment is quite obvious, and the accurate measurement of the MOA leakage current is extremely important, so that the measurement error of the dry lightning arrester monitoring terminal needs to be reduced to improve the measurement precision of the dry lightning arrester monitoring terminal. The linear tracking of the dry arrester monitoring terminal on the measured value is achieved by compensating the exciting current in the iron core causing the measurement error of the dry arrester monitoring terminal, so that the acquisition precision of the dry arrester monitoring terminal reaches microampere level.
And step S2, the online data management system is used for receiving the full information of the lightning arrester, analyzing and processing the full information, and judging whether the voltage, the current and the resistance value of the lightning arrester exceed the limits.
In step S2, the online data management system further includes a data backup module, where the data backup module is connected to the lightning arrester monitoring terminal and performs primary backup on the original data collected by the lightning arrester monitoring terminal.
And step S3, the online data management system sends the analyzed and processed data to a remote early warning system, and the remote early warning system actively warns the lightning arrester with the abnormal fault.
The remote early warning system sends an early warning signal to a worker through a GSM short message or an APP tool, remote online real-time detection is carried out, a fault is found, and second-level reporting is carried out, so that functions of alarming, short message, analysis and the like are completed immediately. The remote early warning system can establish a multi-data-source arrester state evaluation model for each arrester monitoring terminal, achieves quantitative evaluation and trend analysis of the arrester operation condition and active alarm and auxiliary decision functions of abnormal faults, and powerfully improves the operation maintenance capability and the management and control technical level of the arrester.
The system can receive the high-precision full-quantity acquisition intelligent monitoring terminal data of the lightning arrester in real time on line, dynamically display the data, automatically diagnose the operation condition of the lightning arrester and give an early warning, and can give an alarm through a GSM (global system for mobile communications) short message or APP (application) tool, give related auxiliary maintenance suggestions (such as spare parts, route planning schemes and the like), and improve the operation maintenance efficiency and the technical level.
According to the method, a large amount of experimental data is developed for data accumulation, the decision-making effect is optimized, expert rules are extracted at the same time, an attempt is made to provide a grading method for the abnormal state of the lightning arrester and corresponding characteristic quantity indexes, a state evaluation prediction algorithm is introduced at the same time, the diagnosis and evaluation can be automatically adapted to various lightning arrester operation environments and working conditions, and accurate and reliable judgment of the operation aging state of the lightning arrester and active early warning of the abnormal state are realized.
In addition, in order to prevent the equipment from being damaged by lightning stroke or system transient overvoltage, a protection circuit can be added, and the aging misjudgment of the lightning arrester and the damage of a monitoring system caused by current mutation due to the system transient overvoltage are prevented by using technical means such as isolation, shielding, equipotential and the like. Corresponding anti-interference measures are taken through the influence on factors such as surface dirt, air humidity, electromagnetic environment and the like, and the false alarm rate is further reduced.
According to the invention, the lightning arrester high-precision acquisition intelligent monitoring terminal is installed on the test point power transmission line, so that the deterioration degree (leakage current) of the lightning arrester can be monitored in real time. Once the arrester is degraded, the system timely gives an alarm to the degradation degree of the arrester, timely informs operation and maintenance personnel to maintain, avoids that the rear-end equipment cannot achieve the lightning protection effect and even is damaged due to the damage of the arrester, and achieves the aim of rapidly and efficiently judging the working state of the arrester. Meanwhile, by mastering the thunder and lightning stroke rules, the disaster caused by the thunder is prevented or lightened, and the comprehensive capability of defending the thunder disaster is improved.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (7)
1. A state evaluation method for lightning arresters of a power transmission and distribution line is characterized by comprising the following steps:
s1, installing a plurality of lightning arrester monitoring terminals on the lightning arresters of the power transmission and distribution line, collecting the total information of the lightning arresters and feeding the collected total information back to the online data management system;
step S2, the online data management system is used for receiving the full information of the lightning arrester, analyzing and processing the full information, and judging whether the voltage, the current and the resistance value of the lightning arrester exceed the limit;
and step S3, the online data management system sends the analyzed and processed data to a remote early warning system, and the remote early warning system actively warns the lightning arrester with the abnormal fault.
2. The method for evaluating the condition of the lightning arresters on the power transmission and distribution line according to claim 1, wherein in the step S1, the full information of the lightning arresters comprises the resistive current, the leakage current, the number of lightning strikes, the environmental parameters and the geographic coordinate information of the lightning arresters.
3. The method for evaluating the state of the lightning arresters on the transmission and distribution line according to claim 2, wherein in step S1, the lightning arresters are zinc oxide lightning arresters.
4. The method for evaluating the status of the lightning arresters on the power transmission and distribution line according to claim 1, wherein in the step S1, the lightning arrester monitoring terminal comprises a data acquisition unit, a multi-energy complementary energy supply unit, a positioning unit and a wireless communication unit which are connected in sequence.
5. The method for evaluating the state of the lightning arresters on the power transmission and distribution line according to claim 1, wherein in the step S2, the online data management system further comprises a data backup module, wherein the data backup module is connected to the lightning arrester monitoring terminal and performs primary backup on the original data collected by the lightning arrester monitoring terminal.
6. The method for evaluating the states of the lightning arresters of the power transmission and distribution line according to claim 1, wherein in the step S3, the remote early warning system sends the early warning signal to the staff through a GSM short message or an APP tool.
7. The method for evaluating the states of the lightning arresters on the power transmission and distribution line according to claim 1, wherein in the step S3, the remote early warning system establishes an evaluation model of the states of the lightning arresters with multiple data sources for each lightning arrester monitoring terminal.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207301195U (en) * | 2017-08-29 | 2018-05-01 | 江苏久创电气科技有限公司 | A kind of busbar voltage sampler of arrester on-line monitoring |
| CN110794251A (en) * | 2019-12-03 | 2020-02-14 | 常德威迪电气有限责任公司 | Fault online monitoring method and system for lightning arrester |
| CN112858762A (en) * | 2019-11-28 | 2021-05-28 | 郑州祥和集团有限公司 | Method for analyzing resistive current and harmonic current of lightning arrester |
| CN113156245A (en) * | 2021-04-19 | 2021-07-23 | 安徽送变电工程有限公司 | Lightning arrester state monitoring device and control method |
| CN213986651U (en) * | 2020-10-23 | 2021-08-17 | 华能西藏雅鲁藏布江水电开发投资有限公司 | Multi-state online monitoring system for lightning arrester |
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- 2021-08-30 CN CN202111004727.3A patent/CN113740646A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207301195U (en) * | 2017-08-29 | 2018-05-01 | 江苏久创电气科技有限公司 | A kind of busbar voltage sampler of arrester on-line monitoring |
| CN112858762A (en) * | 2019-11-28 | 2021-05-28 | 郑州祥和集团有限公司 | Method for analyzing resistive current and harmonic current of lightning arrester |
| CN110794251A (en) * | 2019-12-03 | 2020-02-14 | 常德威迪电气有限责任公司 | Fault online monitoring method and system for lightning arrester |
| CN213986651U (en) * | 2020-10-23 | 2021-08-17 | 华能西藏雅鲁藏布江水电开发投资有限公司 | Multi-state online monitoring system for lightning arrester |
| CN113156245A (en) * | 2021-04-19 | 2021-07-23 | 安徽送变电工程有限公司 | Lightning arrester state monitoring device and control method |
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