CN109100617A - A kind of power transmission line lightning shielding Fault Locating Method based on accurate measurement voltage - Google Patents
A kind of power transmission line lightning shielding Fault Locating Method based on accurate measurement voltage Download PDFInfo
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- CN109100617A CN109100617A CN201811311683.7A CN201811311683A CN109100617A CN 109100617 A CN109100617 A CN 109100617A CN 201811311683 A CN201811311683 A CN 201811311683A CN 109100617 A CN109100617 A CN 109100617A
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Locating Faults (AREA)
Abstract
This application provides a kind of power transmission line lightning shielding Fault Locating Methods based on accurate measurement voltage, when transmission line of electricity is struck by lightning, lightning strike spot will will appear biggish overvoltage, and the overvoltage traveling wave can be with a certain attenuation coefficient to route two sides fading propagation, pass through the accurate measurement to voltage at different location on route, it calculates line voltage distribution attenuation coefficient and calculates the position for generation of being out of order, improve the speed and accuracy of lightning fault positioning.
Description
Technical field
This application involves power system transmission line lightning monitoring technical fields, more particularly to one kind is based on accurate measurement electricity
The power transmission line lightning shielding Fault Locating Method of pressure.
Background technique
Accident in power grid occupies larger proportion with the failure of transmission line of electricity, and the failure of transmission line of electricity is with lightning stroke trip
The specific gravity accounted for is larger, especially the transmission line of electricity in mountain area, and failure is substantially as caused by lightning stroke trip.According to log
Analysis, the point failure of overhead transmission line be mainly characterized by it is seasonal it is strong, form that fast, harm is big, fault point is not easy to find, easily
Invisible defect is formed, such as eliminating not in time may cause the pernicious failure of continuity, form major accident to power grid.Currently, only according to
Method by routinely making an inspection tour is difficult to find out the scene of accident, is not easy quickly and accurately to find failure.
Summary of the invention
This application provides a kind of power transmission line lightning shielding Fault Locating Method based on accurate measurement voltage, with solve only according to
Method by routinely making an inspection tour is difficult to find out the scene of accident, is not easy the problem of quickly and accurately finding failure.
This application provides a kind of power transmission line lightning shielding Fault Locating Method based on accurate measurement voltage, the method packets
It includes:
Obtain the real time voltage waveforms of tested point on transmission line of electricity；
According to the real time voltage waveforms of tested point on the transmission line of electricity, the current of tested point on the transmission line of electricity is judged
Whether voltage is overvoltage；
If the current voltage of tested point is overvoltage on the transmission line of electricity, from tested point on the transmission line of electricity
Several voltage acquisition points are chosen respectively in two sides；
It is ipsilateral according to the voltage value of the point of voltage acquisition described in several and positioned at power main road tested point
Transmission line of electricity voltage attenuation coefficient is calculated in the distance between voltage acquisition point；
The voltage of tested point two sides is adopted according to the transmission line of electricity voltage attenuation coefficient and on the transmission line of electricity
The distance between collection point, determines power transmission line lightning shielding location of fault.
From the above technical scheme, this application provides a kind of power transmission line lightning shielding failures based on accurate measurement voltage
Localization method, when transmission line of electricity is struck by lightning, lightning strike spot will will appear biggish overvoltage, and the overvoltage traveling wave can be with
A certain attenuation coefficient calculates outlet by the accurate measurement to voltage at different location on route to route two sides fading propagation
The speed and accuracy of lightning fault positioning is improved in road voltage attenuation coefficient and the position for calculating generation of being out of order.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of process of power transmission line lightning shielding Fault Locating Method based on accurate measurement voltage provided by the present application
Figure；
Fig. 2 is the structure chart of power transmission line lightning shielding fault monitoring system；
Fig. 3 is transmission line lightning stroke fault location schematic diagram.
Specific embodiment
Referring to Fig. 1, this application provides a kind of power transmission line lightning shielding Fault Locating Method based on accurate measurement voltage, institutes
The method of stating includes:
Step 11: obtaining the real time voltage waveforms of tested point on transmission line of electricity.
Referring to fig. 2, ceramic condenser core insulation substring is installed, C1 is high voltage arm capacitor, C2 on transmission line of electricity at tested point
For low-voltage arm capacitor, it is used to monitor the real time voltage waveforms of tested point on transmission line of electricity using over-voltage monitoring device, and passes through
Wireless network sends transmission line of electricity over-voltage transmission distribution character and arrester monitoring system to.
Step 12: according to the real time voltage waveforms of tested point on the transmission line of electricity, judging to be measured on the transmission line of electricity
Whether the current voltage of point is overvoltage.If the current voltage of tested point is overvoltage on the transmission line of electricity, step is executed
Rapid 13.
Step 13: choosing several voltage acquisition points respectively from the two sides of tested point on the transmission line of electricity.
Overvoltage indicates that lightning fault occurs for tested point, and overvoltage can be carried out by transmission line of electricity to tested point two sides
It propagates, therefore, several voltage acquisition points are chosen in the two sides of tested point respectively on the transmission line.
Step 14: according to the voltage value of the point of voltage acquisition described in several and being located at power main road tested point
Transmission line of electricity voltage attenuation coefficient is calculated in the distance between ipsilateral voltage acquisition point.
Specifically, obtain the voltage value of several voltage acquisition points and be located at the power main road to
Ipsilateral the distance between the voltage acquisition point of measuring point.
According to the voltage value of several voltage acquisition points and be located at power main road tested point it is same
Transmission line of electricity voltage attenuation coefficient is calculated according to following formula in the distance between voltage acquisition point of side；
Wherein, α indicates the first transmission line of electricity voltage attenuation coefficient；β indicates the second transmission line of electricity voltage attenuation coefficient；U1Table
Show the voltage value of a voltage acquisition point nearest apart from power main road tested point；U11Expression and U1Corresponding voltage is adopted
The voltage value of the ipsilateral voltage acquisition point of collection point；L3Indicate U1Corresponding voltage acquisition point and U11Between corresponding voltage acquisition point
Distance；U2Expression and U1The opposite side of corresponding voltage acquisition point and nearest apart from power main road tested point
The voltage value of voltage acquisition point；U22Indicate U2The voltage value of the ipsilateral voltage acquisition point of corresponding voltage acquisition point, L4Indicate U2It is right
The voltage acquisition point and U answered22The distance between corresponding voltage acquisition point.
For example, as shown in figure 3, A, B, C and D are the voltage acquisition point positioned at tested point two sides, U11Indicate the electricity that B point measures
Pressure value, U1Indicate the voltage value that A point measures, L3Indicate the distance of two voltage acquisition points of A and B, U2Indicate the voltage that C point measures
Value；U22Indicate the voltage value that D point measures, L4Indicate the distance of two voltage acquisition points of C and D.
Step 15: according to the transmission line of electricity voltage attenuation coefficient and the tested point two sides on the transmission line of electricity
The distance between voltage acquisition point, determines power transmission line lightning shielding location of fault.
Specifically, according to the transmission line of electricity voltage attenuation coefficient and the tested point two sides on the transmission line of electricity
Line fault point distance U is calculated according to following formula in the distance between voltage acquisition point1Corresponding voltage collection point away from
From；
Wherein, α indicates the first transmission line of electricity voltage attenuation coefficient,；β indicates the second transmission line of electricity
Voltage attenuation coefficient；U1Indicate the voltage value of a voltage acquisition point nearest apart from power main road tested point；U2It indicates
With U1The opposite side of corresponding voltage acquisition point and the voltage acquisition point nearest apart from power main road tested point
Voltage value；L indicates U2Corresponding voltage acquisition point and U1The distance between corresponding voltage acquisition point；L1Indicate U1Corresponding electricity
Press the distance between tested point on collection point and transmission line of electricity.Continue by taking Fig. 3 as an example, L indicates two voltage acquisition points of A and C
Distance；L1Indicate the distance between A and tested point.
From the above technical scheme, this application provides a kind of power transmission line lightning shielding failures based on accurate measurement voltage
Localization method, when transmission line of electricity is struck by lightning, lightning strike spot will will appear biggish overvoltage, and the overvoltage traveling wave can be with
A certain attenuation coefficient calculates outlet by the accurate measurement to voltage at different location on route to route two sides fading propagation
The speed and accuracy of lightning fault positioning is improved in road voltage attenuation coefficient and the position for calculating generation of being out of order.
Claims (3)
1. a kind of power transmission line lightning shielding Fault Locating Method based on accurate measurement voltage, which is characterized in that the described method includes:
Obtain the real time voltage waveforms of tested point on transmission line of electricity；
According to the real time voltage waveforms of tested point on the transmission line of electricity, the current voltage of tested point on the transmission line of electricity is judged
It whether is overvoltage；
If the current voltage of tested point is overvoltage on the transmission line of electricity, from the two sides of tested point on the transmission line of electricity
Several voltage acquisition points are chosen respectively；
According to the voltage value of the point of voltage acquisition described in several and the voltage ipsilateral positioned at power main road tested point
Transmission line of electricity voltage attenuation coefficient is calculated in the distance between collection point；
The voltage acquisition point of tested point two sides according to the transmission line of electricity voltage attenuation coefficient and on the transmission line of electricity
The distance between, determine power transmission line lightning shielding location of fault.
2. the method as described in claim 1, which is characterized in that the voltage value according to the point of voltage acquisition described in several with
And the voltage acquisition point the distance between ipsilateral positioned at power main road tested point, transmission line of electricity voltage is calculated and declines
Subtracting coefficient includes:
Obtain the voltage value of several voltage acquisition points and ipsilateral positioned at power main road tested point
The distance between voltage acquisition point,
It is ipsilateral according to the voltage value of several voltage acquisition points and positioned at power main road tested point
Transmission line of electricity voltage attenuation coefficient is calculated according to following formula in the distance between voltage acquisition point；
Wherein, α indicates the first transmission line of electricity voltage attenuation coefficient；β indicates the second transmission line of electricity voltage attenuation coefficient；U1Indicate away from
The voltage value of a voltage acquisition point nearest from power main road tested point；U11Expression and U1Corresponding voltage acquisition point
The voltage value of ipsilateral voltage acquisition point；L3Indicate U1Corresponding voltage acquisition point and U11Between corresponding voltage acquisition point away from
From；U2Expression and U1The opposite side of corresponding voltage acquisition point and the voltage nearest apart from power main road tested point
The voltage value of collection point；U22Indicate U2The voltage value of the ipsilateral voltage acquisition point of corresponding voltage acquisition point, L4Indicate U2It is corresponding
Voltage acquisition point and U22The distance between corresponding voltage acquisition point.
3. method according to claim 2, which is characterized in that described according to the transmission line of electricity voltage attenuation coefficient and position
The distance between voltage acquisition point in tested point two sides on the transmission line of electricity, determines power transmission line lightning shielding location of fault packet
It includes:
The voltage acquisition point of tested point two sides according to the transmission line of electricity voltage attenuation coefficient and on the transmission line of electricity
The distance between, according to following formula, line fault point distance U is calculated1The distance of corresponding voltage collection point；
Wherein, α indicates the first transmission line of electricity voltage attenuation coefficient,；β indicates that the second transmission line of electricity voltage declines
Subtract coefficient；U1Indicate the voltage value of a voltage acquisition point nearest apart from power main road tested point；U2Expression and U1It is right
The voltage value of the opposite side of the voltage acquisition point answered and the voltage acquisition point nearest apart from power main road tested point；
L indicates U2Corresponding voltage acquisition point and U1The distance between corresponding voltage acquisition point；L1Indicate U1Corresponding voltage acquisition point
With the distance between tested point on transmission line of electricity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811311683.7A CN109100617A (en) | 2018-11-06 | 2018-11-06 | A kind of power transmission line lightning shielding Fault Locating Method based on accurate measurement voltage |
| CN201911035509.9A CN110568320B (en) | 2018-11-06 | 2019-10-29 | Power transmission line lightning fault positioning method based on accurate voltage measurement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811311683.7A CN109100617A (en) | 2018-11-06 | 2018-11-06 | A kind of power transmission line lightning shielding Fault Locating Method based on accurate measurement voltage |
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| CN109100617A true CN109100617A (en) | 2018-12-28 |
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| CN201811311683.7A Pending CN109100617A (en) | 2018-11-06 | 2018-11-06 | A kind of power transmission line lightning shielding Fault Locating Method based on accurate measurement voltage |
| CN201911035509.9A Active CN110568320B (en) | 2018-11-06 | 2019-10-29 | Power transmission line lightning fault positioning method based on accurate voltage measurement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175611A (en) * | 2020-02-06 | 2020-05-19 | 云南电网有限责任公司电力科学研究院 | Power distribution network line fault positioning method and system |
| CN111239543A (en) * | 2020-02-06 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Fault positioning method based on lightning overvoltage gradient transmission characteristic |
| CN111239547A (en) * | 2020-02-06 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Fault positioning method based on lightning overvoltage gradient transmission characteristic |
| CN111458597A (en) * | 2020-02-06 | 2020-07-28 | 云南电网有限责任公司电力科学研究院 | Fault positioning method based on lightning overvoltage phase transmission characteristic |
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| CN111239544B (en) * | 2020-02-06 | 2021-04-27 | 云南电网有限责任公司电力科学研究院 | Method for positioning lightning overvoltage fault point |
| CN111239546B (en) * | 2020-02-06 | 2021-07-27 | 云南电网有限责任公司电力科学研究院 | Lightning overvoltage on-line distance measurement and fault location method |
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| CN102654552A (en) * | 2012-04-16 | 2012-09-05 | 昆明理工大学 | Method for protecting transient voltages at two terminals of super-high voltage direct current transmission line |
| RU2540443C1 (en) * | 2013-07-23 | 2015-02-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный исследовательский Томский политехнический университет" | Method for determining place of failure on overhead transmission line |
| CN103543386B (en) * | 2013-10-16 | 2015-12-09 | 清华大学 | A kind of thunderbolt localization method of transmission line of electricity |
| CN103543387B (en) * | 2013-10-16 | 2016-02-10 | 清华大学 | A kind of transmission line lightning stroke location and lightning current inversion method |
| CN103592569B (en) * | 2013-11-06 | 2016-06-08 | 昆明理工大学 | A kind of extra-high-voltage direct-current transmission line fault location based on high frequency content attenuation characteristic |
| CN105938173B (en) * | 2016-04-14 | 2018-12-14 | 云南电网有限责任公司电力科学研究院 | A kind of supertension line failure precision ranging method |
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- 2018-11-06 CN CN201811311683.7A patent/CN109100617A/en active Pending
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111175611A (en) * | 2020-02-06 | 2020-05-19 | 云南电网有限责任公司电力科学研究院 | Power distribution network line fault positioning method and system |
| CN111239543A (en) * | 2020-02-06 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Fault positioning method based on lightning overvoltage gradient transmission characteristic |
| CN111239547A (en) * | 2020-02-06 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Fault positioning method based on lightning overvoltage gradient transmission characteristic |
| CN111458597A (en) * | 2020-02-06 | 2020-07-28 | 云南电网有限责任公司电力科学研究院 | Fault positioning method based on lightning overvoltage phase transmission characteristic |
| CN111239543B (en) * | 2020-02-06 | 2021-09-03 | 云南电网有限责任公司电力科学研究院 | Fault positioning method based on lightning overvoltage gradient transmission characteristic |
| CN111175611B (en) * | 2020-02-06 | 2022-04-12 | 云南电网有限责任公司电力科学研究院 | Power distribution network line fault positioning method and system |
| CN111239547B (en) * | 2020-02-06 | 2022-05-20 | 云南电网有限责任公司电力科学研究院 | Fault positioning method based on lightning overvoltage gradient transmission characteristic |
| CN111458597B (en) * | 2020-02-06 | 2022-06-10 | 云南电网有限责任公司电力科学研究院 | Fault positioning method based on lightning overvoltage phase transmission characteristic |
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| CN110568320B (en) | 2021-10-15 |
| CN110568320A (en) | 2019-12-13 |
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Application publication date: 20181228 |