CN101975909B - Method for judging failure properties of shielding failure and counterattack of transmission line - Google Patents
Method for judging failure properties of shielding failure and counterattack of transmission line Download PDFInfo
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Abstract
The invention relates to a method for judging the failure properties of shielding failure and counterattack of a transmission line. In the method, a computer is adopted to collect and process data; and for a certain lightning tripping failure of the transmission line, a lightning protection simulation analysis program is adopted and the collected and processed data is applied by the analysis of the computer to perform simulation reduction and comparison analysis on a circuit-failing tower with the lightning tripping to obtain a judgment result based on the data of the transmission line provided by a running unit, circuit tripping failure data and the lightning activity information of a line corridor obtained by the query of a lightning positioning system. The method comprises the following basic steps of: (1) performing collection and clearing-up on the data of the transmission line and the circuit tripping failure data by adopting the computer; (2) querying the lightning activity information in the corridor of the failing tower by utilizing the lightning positioning system; (3) analyzing the lightning protection performance of the failing tower by the computer by utilizing the lightning protection simulation analysis program; and (4) checking the lightning protection performance and judging the failure property. The method is simple, convenient and easy to operate and convenient to popularize and apply, and ensures low cost.
Description
Technical field
The present invention relates to electrical network lightning protection field, particularly a kind of transmission line of electricity shielding with the counterattack nature of trouble method of discrimination, its be applicable to transmission line of electricity receive the thunderbolt cause the tripping operation fault be shielding or the counterattack nature of trouble differentiation.
Background technology
Current, the electric network thunderstorm damage accident is more and more serious, has directly influenced the reliability of the safe and stable operation and the power consumption of electrical network.Differentiate existing transmission line lightning stroke nature of trouble, analyze the concrete reason of lightning stroke trip, be meant the important reference that the conductive mesh lightning protection is transformed.
Know according to the applicant, at present the differentiation of transmission line lightning stroke tripping operation nature of trouble is mainly contained the magnetic link method and according to the experience diagnostic method of lightning location system.
The magnetic link method; Be that the magnetic link device is installed on electric power line pole tower top, aerial earth wire or coupling ground wire, lightning current will make magnetic link obtain remanent magnetism through magnetic link; Size and the polarity of judging lightning current by the size and the polarity of remanent magnetism on the magnetic link; The lightning current that flows through magnetic link through the record mounting points is big or small, and the lightning current direction that is reflected, thereby judges that the lightning stroke trip nature of trouble is shielding or counterattack.
Experience diagnostic method according to lightning location system; Its main basis source is in the Monitoring Data of lightning location system; Behind circuit generation lightning stroke trip; Circuit operation maintenance staff will be big or small through the amplitude of lightning current that the inquiry lightning location system records; The performance of the fault of combined circuit and China's Electric Power Industry standard " overvoltage protection of alternating-current electric device and Insulation Coordination " (DL/T620-1997) in given typical shaft tower shielding lightning withstand level analyze comparison with counterattack lightning withstand level value, and then judge that the lightning fault character of circuit is shielding or counterattack.
The applicant finds through research and test, and utilization magnetic link method and according to the experience diagnostic method of lightning location system exists problems and deficiency to the differentiation of transmission line lightning stroke tripping operation nature of trouble, causes its accuracy of differentiating the result to be difficult to guarantee.Utilization magnetic link method need be installed the magnetic link device on the line; But the problem that is run into is; The magnetic properties of the magnetic link that adopts and the relation of being surveyed between the lightning current are difficult to accurate assurance; This is because the prescription of magnetic link and production technology exist dispersedly, can't unify to confirm the accurate relation of remanent magnetism and the lightning current of surveying on the magnetic link; Also exist the situation be difficult to expect to take place simultaneously: to be prone in transportation to cause " information " to lose because of vibration changes like the remanent magnetism of the magnetic link that writes down lightning current information; Besides, magnetic link sometimes also can be owing to strong lightning current appearance be saturated, and its measuring accuracy is also measured the influence of environmental magnetic field.These factors have all influenced and have adopted the accurate judgement of magnetic link method to the transmission line lightning stroke nature of trouble.According to the experience diagnostic method of lightning location system in use; Because the shielding that China's Electric Power Industry standard " overvoltage protection of alternating-current electric device and Insulation Coordination " (DL/T620-1997) provides, counterattack lightning withstand level value are the situation of typical shaft tower, the concrete condition that the tripping operation overhead line structures take place with reality there are differences; And counterattack lightning withstand level in the standard and shielding lightning withstand level derive to be handled the simplification of calculation procedure and method; Thereby the judgement that causes carrying out the transmission line lightning stroke nature of trouble according to the experience diagnostic method of lightning location system can cause error; Its Consideration is comprehensive inadequately; Do not take into full account the practical structures characteristic and the topography and landform character of circuit, can not accurately reflect the shielding and counterattack lightning withstand level of actual track, and then influence the accuracy of judging resulting lightning fault character yet.Hence one can see that, directly according to the artificial subjective judgement of experience, has the shortcoming uncertain higher, that error is bigger according to lightning location system.
Chinese patent document disclosed " recognition methods of a kind of transmission line of alternation current thunderbolt and counterattack " (application number: 200810058558.X) be; In the travelling wave analysis and range finding high speed acquisition system of protection installation place; Utilize wavelet analysis to extract zero energy of mould electric current under different frequency bands, distinguish thunderbolt fault and counterattack fault according to the characteristic of energy distribution.The applicant thinks through analysis and research; This method depends on the travelling wave analysis and range finding high speed acquisition system of AC system protection installation place; The precision of this method effect and this acquisition system, stability, reliability have very big relation, with directly having influence on final analysis and judgement result.
Chinese patent document disclosed " transmission line thunderbolt, counterattack arbiter " (application number: 200810073599.6) be; Erecting device (comprising current sensor, data transmission module, data processing module, signal transmitting apparatus, display unit) on the line; Through gathering sense of current, the judgement shielding is still strikeed back.The deficiency that this invention exists is that needs are attachment means on the line, thereby has increased because of the erecting device hidden danger that operation brings to line security, has also increased equipment cost and installation and maintenance expense thereof simultaneously.
Summary of the invention
The objective of the invention is,, propose the method for discrimination of a kind of transmission line of electricity shielding and counterattack nature of trouble to the deficiency of prior art.Specifically; Be to transmission line of electricity shielding and counterattack nature of trouble; Utilize lightning location system and lightning protection simulation analysis program, use, handle, analyze the various data that relate to concrete transmission line of electricity shielding and counterattack fault, through the method for relatively differentiating by computing machine.
Technical solution of the present invention is that the employing computing machine is collected and deal with data; It is characterized in that, to certain transmission line lightning stroke that has taken place tripping operation fault, this transmission line of electricity data, line tripping fault data that provides based on run unit and the circuit corridor lightening activity information of utilizing lightning location system inquiry gained; And adopt lightning protection simulation analysis program, and through Computer Analysis, the data that utilization is collected and handled; Line fault shaft tower to concrete generation lightning stroke trip carries out the emulation reduction; Comparative analysis draws the differentiation result, and basic step is following:
(1) adopt computing machine to compile transmission line of electricity data and line tripping fault data
Transmission line of electricity data and line tripping fault data comprise failure message, line construction characteristic information, the circuit geographic entity information of transmission line caused by lightning strike; Wherein, the failure message of transmission line caused by lightning strike comprises lightning stroke trip time, line name, circuit line walking result, fault performance and damaed cordition; The line construction characteristic information comprises shaft tower model, physical dimension, insulation configuration, span length, a plurality of parameters of stake resistance of fault shaft tower and adjacent shaft tower thereof; Circuit geographic entity information comprises a plurality of parameters of latitude and longitude coordinates, sea level elevation, topography and geomorphology of fault tower and adjacent towers, and topography and geomorphology comprises level land, Yan Po, climbing, mountain top, mountain valley, strides the concrete data in mountain valley;
(2) utilize lightning location system to inquire about the lightening activity information in the fault shaft tower corridor
The lightning stroke trip time and the line name that provide according to run unit; With the lightning location system is platform; Lightening activity situation in the inquiry lightning stroke trip time period in this fault shaft tower corridor thunderbolt width; Obtain the lightening activity information in this time period, comprising gps time, latitude and longitude coordinates, polarity and the amplitude of lightning current of thunder and lightning generation;
(3) utilize lightning protection simulation analysis program, through the lightning protection properties of Computer Analysis fault tower
Structure feature information and geographic entity information in conjunction with transmission line of electricity; Utilize lightning protection simulation analysis program; Through physical dimension, insulation configuration, span length, stake resistance, a plurality of parameters of topography and geomorphology of computing machine input fault shaft tower and adjacent shaft tower thereof, analyze the counterattack lightning withstand level, shielding lightning withstand level and the maximum around shocking current value that obtain the fault shaft tower;
(4) lightning protection properties is checked and the nature of trouble differentiation
Compare and make differentiation analyzing the amplitude of lightning current that utilizes lightning location system inquiry gained in the counterattack of fault shaft tower lightning withstand level, shielding lightning withstand level and maximum around shocking current value and the step (2) that obtains in the step (3), thereby to draw the transmission line caused by lightning strike nature of trouble be shielding or strike back.
It is characterized in that the thunderbolt width of described transmission line caused by lightning strike time period, shaft tower is confirmed by following method respectively:
The selection of A, transmission line caused by lightning strike time period will be according to the trip time that run unit provided;
The thunderbolt width of B, shaft tower adopts computing formula to obtain: W=b+4h
s, the m of unit; Wherein, b is the horizontal range between two lightning conducters of shaft tower, the m of unit; h
sBe lightning conducter average height over the ground, the m of unit.
Advantage of the present invention is; The circuit corridor lightening activity information that transmission line of electricity data, line tripping fault data and the lightning location system that can fully use run unit to provide inquired about gained; Come objectively to make the trip differentiation of fault of the correct transmission line lightning stroke about having taken place, method is simple, effective practically; Expense is low, and is easy to utilize.The present invention does not need to install in addition on the line other monitoring device, thereby has avoided the deficiency of bringing hidden danger for the safe operation of transmission line of electricity because of the monitoring device that other is installed effectively, has saved unnecessary equipment cost and installation and maintenance expense thereof yet; Also overcome simultaneously in the past shortcoming according to lightning location system is directly higher according to the existing uncertainty of the artificial subjective judgement of experience, error is bigger.The present invention takes into full account the characteristic of line construction, topography and geomorphology according to the lightening activity of circuit, as analytic target, utilizes lightning protection simulation analysis program to analyze through computing machine in concrete lightning fault shaft tower, and the result who obtains is accurate, quick, objective.Of the present invention applying will help transmission line of electricity operation maintenance department to judge the character and the reason of understanding lightning fault of circuit lightning fault effectively, more scientifically instructs the transmission line of electricity lightning protection to transform.
Description of drawings
Fig. 1, process flow diagram of the present invention.
Fig. 2, the synoptic diagram of transmission line of electricity on the hillside that supports by shaft tower
Embodiment
Below, in conjunction with accompanying drawing embodiments of the invention are done explanation further.
As shown in Figure 1, the technical solution that proposes according to the present invention in force, to certain transmission line lightning stroke that has taken place tripping operation fault; This transmission line of electricity data, the line tripping fault data that provides based on run unit and utilize the circuit corridor lightening activity information of lightning location system inquiry gained; And adopt lightning protection simulation analysis program, and through Computer Analysis, the data that utilization is collected and handled; Line fault shaft tower to concrete generation lightning stroke trip carries out the emulation reduction; Comparative analysis draws the differentiation result, specifically adopts following steps:
(1) adopt computing machine to compile transmission line information (transmission line of electricity data and line tripping fault data)
Given needs carry out the transmission line information that the lightning stroke trip nature of trouble is differentiated; The fault message that comprises transmission line caused by lightning strike (comprises the lightning stroke trip time; Line name; Circuit line walking result; Parameters such as fault performance and loss); Line construction characteristic information (the shaft tower model that comprises fault shaft tower and adjacent shaft tower; Physical dimension; Insulation configuration; Span length; Parameters such as earth resistance); The circuit geographical feature information (latitude and longitude coordinates that comprises fault tower and adjacent towers; Height above sea level; The a plurality of parameters of topography and geomorphology, topography and geomorphology comprises the level land; Along the slope; Climbing; The mountain top; The mountain valley; Stride the concrete data in mountain valley);
(2) utilize lightning location system inquiry lightning monitoring information
The lightning stroke trip time and the line name that provide according to run unit; Utilize lightning location system; Inquiry is in transmission line caused by lightning strike lightening activity situation in this fault shaft tower thunderbolt width in the time period; Obtain lightning information, the lightning information that obtains comprises gps time, latitude and longitude coordinates, polarity and the amplitude of lightning current that thunder and lightning takes place;
The thunderbolt width of transmission line caused by lightning strike time period, shaft tower is confirmed by following method respectively:
The selection of A, transmission line caused by lightning strike time period will be according to the trip time that run unit provided;
If trip time of providing of run unit is accurate to " branchs " level, then inquire about the lightening activity situation within the trip time front and back one minute; If the trip time that run unit provides is accurate to " second " level or more accurate rank, then inquire about the lightening activity situation of trip time front and back within one second;
The thunderbolt width of B, shaft tower adopts given computing formula: W=b+4h among the existing power industry standard DL/T620-1997 of China " overvoltage protection of alternating-current electric device and Insulation Coordination "
s, the m of unit; Wherein, b is the horizontal range between two lightning conducters of shaft tower, the m of unit; h
sBe lightning conducter average height over the ground, the m of unit.
(3) fault shaft tower lightning protection properties is analyzed
Structure feature information and geographic entity information in conjunction with fault shaft tower and adjacent shaft tower thereof in the transmission line of electricity; Utilize lightning protection simulation analysis program; Parameters such as the physical dimension of input fault shaft tower and adjacent shaft tower thereof, insulation configuration, span length, stake resistance, topography and geomorphology; Through Computer Analysis, obtain counterattack lightning withstand level, shielding lightning withstand level and the maximum around shocking current amplitude of fault shaft tower;
(4) differentiation of the check of lightning protection properties and lightning fault character
According to the amplitude of lightning current that utilizes lightning location system inquiry gained in the step (2); Compare with shielding lightning withstand level, counterattack lightning withstand level, the maximum shielding current amplitude of the fault shaft tower that obtains through Computer Analysis in the step (3), carry out lightning fault character and differentiate:
If amplitude of lightning current is confirmed as counterattack greater than the counterattack lightning withstand level;
If amplitude of lightning current is greater than the shielding lightning withstand level, and, confirm as shielding smaller or equal to maximum shielding current amplitude.
Be the present invention below to the example that character that thunderbolt causes the tripping operation fault is differentiated takes place, the present invention on August 16th, 2009 certain 500kV transmission line of electricity generation lightning stroke trip fault be that the shielding or the nature of trouble of counterattack are differentiated.
At first; Lightning stroke trip failure message, line construction characteristic information and the circuit topography and geomorphology information of this circuit that provides according to run unit learn that 15: 38 on the 16th August in 2009, this 500kV circuit A tripped mutually, and the back is successful reclosing automatically; Run unit line walking result proves that the fault shaft tower is the 47# shaft tower; This shaft tower model is ZBV2-45, and insulator sheet number and type are 28 * XWP2-160, and stake resistance is 3.6 ohm.As shown in Figure 2, this shaft tower is positioned at a side on hillside and near the mountain top.
According to lightning stroke trip time and the line name that run unit provides, utilize the lightening activity situation in interior this fault shaft tower corridor thunderbolt width of lightning location system inquiry lightning stroke trip time period, obtain the lightening activity information in this time period.The trip time that run unit provides is 15: 38 on the 16th August in 2009, and through inquiring about before and after 15: 38 on the 16th August in 2009 the 1 minute lightening activity information in the thunderbolt width of internal fault shaft tower 47# shaft tower corridor, the amplitude of lightning current that obtains is 29.1kA.
Shaft tower dimensional parameters, dielectric features parameter, stake resistance parameter, sea level elevation parameter according to circuit; The topography and geomorphology parameter; Utilize lightning protection simulation analysis program, through Computer Analysis, obtaining 47# shaft tower shielding lightning withstand level is 14.5kA; The counterattack lightning withstand level is 135kA, and maximum shielding electric current is 31.4kA.
Lightning location system being inquired about the amplitude of lightning current of gained compares with shielding lightning withstand level, counterattack lightning withstand level and the maximum shielding electric current of the output of lightning protection simulation analysis program; Because the amplitude of lightning current 29.1kA that the lightning location system inquiry obtains is greater than the shielding lightning withstand level 14.5kA of fault shaft tower, less than maximum shielding electric current 31.4kA.Differentiate according to above-mentioned analysis comparative result: on August 16th, 2009, the tripping operation fault that thunderbolt causes took place in certain 500kV transmission line of electricity, was the shielding nature of trouble.
Claims (2)
1. the method for discrimination of transmission line of electricity shielding and counterattack nature of trouble adopts computing machine, collects and deal with data; It is characterized in that, to certain transmission line lightning stroke that has taken place tripping operation fault, this transmission line of electricity data, line tripping fault data that provides based on run unit and the circuit corridor lightening activity information of utilizing lightning location system inquiry gained; And adopt lightning protection simulation analysis program, and through Computer Analysis, the data that utilization is collected and handled; Line fault shaft tower to concrete generation lightning stroke trip carries out the emulation reduction; Comparative analysis draws the differentiation result, and basic step is following:
(1) adopt computing machine to compile transmission line of electricity data and line tripping fault data:
Transmission line of electricity data and line tripping fault data comprise failure message, line construction characteristic information, the circuit geographic entity information of transmission line caused by lightning strike; Wherein, the failure message of transmission line caused by lightning strike comprises lightning stroke trip time, line name, circuit line walking result, fault performance and damaed cordition; The line construction characteristic information comprises shaft tower model, physical dimension, insulation configuration, span length, a plurality of parameters of stake resistance of fault shaft tower and adjacent shaft tower thereof; Circuit geographic entity information comprises a plurality of parameters of latitude and longitude coordinates, sea level elevation, topography and geomorphology of breakdown stick tower and adjacent shaft tower, and topography and geomorphology comprises level land, Yan Po, climbing, mountain top, mountain valley, strides the concrete data in mountain valley;
(2) utilize lightning location system to inquire about the lightening activity information in the fault shaft tower corridor:
The lightning stroke trip time and the line name that provide according to run unit; With the lightning location system is platform; Lightening activity situation in the inquiry lightning stroke trip time period in this fault shaft tower corridor thunderbolt width; Obtain the lightening activity information in this time period, comprising gps time, latitude and longitude coordinates, polarity and the amplitude of lightning current of thunder and lightning generation;
(3) utilize lightning protection simulation analysis program, through the lightning protection properties of Computer Analysis fault shaft tower:
Structure feature information and geographic entity information in conjunction with transmission line of electricity; Utilize lightning protection simulation analysis program; Through physical dimension, insulation configuration, span length, stake resistance, a plurality of parameters of topography and geomorphology of computing machine input fault shaft tower and adjacent shaft tower thereof, analyze the counterattack lightning withstand level, shielding lightning withstand level and the maximum around shocking current value that obtain the fault shaft tower;
(4) lightning protection properties is checked and the nature of trouble differentiation:
Compare and make differentiation analyzing the amplitude of lightning current that utilizes lightning location system inquiry gained in the counterattack of fault shaft tower lightning withstand level, shielding lightning withstand level and maximum around shocking current value and the step (2) that obtains in the step (3), thereby to draw the transmission line caused by lightning strike nature of trouble be shielding or strike back.
2. the method for discrimination of a kind of transmission line of electricity shielding according to claim 1 and counterattack nature of trouble is characterized in that, the thunderbolt width of described transmission line caused by lightning strike time period, shaft tower is confirmed by following method respectively:
The selection of A, transmission line caused by lightning strike time period will be according to the trip time that run unit provided;
The thunderbolt width of B, shaft tower adopts computing formula to obtain: W=b+4h
s, the m of unit; Wherein, b is the horizontal range between two lightning conducters of shaft tower, the m of unit; h
sBe lightning conducter average height over the ground, the m of unit.
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Effective date of registration: 20160629 Address after: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Address before: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Patentee before: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Patentee before: State Grid Electric Power Research Insititute |