CN112557809A - Transmission line fault positioning device - Google Patents
Transmission line fault positioning device Download PDFInfo
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- CN112557809A CN112557809A CN202011231502.7A CN202011231502A CN112557809A CN 112557809 A CN112557809 A CN 112557809A CN 202011231502 A CN202011231502 A CN 202011231502A CN 112557809 A CN112557809 A CN 112557809A
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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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- 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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- 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
Abstract
The invention relates to a fault positioning device for a power transmission line, which comprises a monitoring terminal, the monitoring terminal is provided with an upper shell above the monitoring terminal, a lower shell is arranged below the monitoring terminal, the middle parts of the front sides of the upper shell and the lower shell are respectively provided with an upper cover plate and a lower cover plate, locking screws are arranged on the left side and the right side of the upper side of the front sides of the upper cover plate and the lower cover plate, the inner sides of the upper cover plate and the lower cover plate are respectively provided with an upper protective shell and a lower protective shell, the inner sides of the upper protective shell and the lower protective shell are respectively provided with an upper fixing groove and a lower fixing groove, fault indicators are arranged inside the upper protective shell and the lower protective shell, induction CTs are arranged inside the fault indicators, wire grooves are arranged inside the induction CTs, a power supply control chip is arranged in the middle part of the lower side of the left side of the lower; the invention has the advantages of simple structure, rapid and accurate positioning and convenient use.
Description
Technical Field
The invention belongs to the technical field of power transmission lines, and particularly relates to a power transmission line fault positioning device.
Background
The transmission line is realized by boosting the electric energy generated by the generator by using a transformer and then connecting the electric energy into the transmission line through control equipment such as a circuit breaker and the like, the transmission line is divided into an overhead transmission line and a cable line, along with the rapid development of a smart grid, the occupied position of the transmission line in the grid is more and more important, the operation reliability of the transmission line influences the power supply reliability of the whole power system, and due to the working environment of the transmission line, a fault is easy to occur, and a fault point is rapidly and accurately found after the transmission line fails, so that the transmission line not only can be repaired in time and the power supply can be rapidly recovered, but also has very important effects on the safety; therefore, it is very necessary to provide a transmission line fault positioning device with simple structure, fast and accurate positioning and convenient use.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the transmission line fault positioning device which is simple in structure, quick and accurate in positioning and convenient to use.
The purpose of the invention is realized as follows: the power transmission line fault positioning device comprises a monitoring terminal, a power transmission line and a communication terminal, wherein an upper shell is arranged above the monitoring terminal, a connecting sleeve is arranged at the rear part of the left side above the upper shell, fixing bolts are arranged at four corners above the upper shell, a lower shell is arranged below the monitoring terminal, the upper shell is fixedly connected with the lower shell through the fixing bolts, an upper cover plate and a lower cover plate are respectively arranged at the middle parts of the front parts of the upper shell and the lower shell, spring grooves are respectively arranged at the left side and the right side of the inner sides below the upper cover plate and the lower cover plate, springs are respectively arranged in the spring grooves, locking screws are respectively arranged at the left side and the right side of the front parts of the upper cover plate and the lower cover plate, the upper cover plate and the lower cover plate are respectively fixedly connected with the upper shell and the lower shell through the locking screws, an upper protective shell and a lower protective shell are respectively arranged at, the inner sides of the upper protective shell and the lower protective shell are respectively provided with an upper fixing groove and a lower fixing groove, fault indicators are arranged in the upper protective shell and the lower protective shell, induction CTs are arranged in the fault indicators, wire grooves are arranged in the induction CTs, a power supply control chip is arranged in the middle of the lower portion of the left side of the lower protective shell, a wireless communication antenna is arranged below the right side of the upper protective shell, a limiting column is arranged on the left side above the wireless communication antenna, and the wireless communication antenna penetrates through a monitoring terminal and is fixedly connected with the monitoring terminal through a connecting sleeve; communication terminal below be provided with the bottom plate, the bottom plate left and right sides all be provided with the lockplate, communication terminal pass through lockplate and bottom plate fixed connection, communication terminal top be provided with solar panel, communication terminal left and right sides top all be provided with the fixation clamp, the fixation clamp top be provided with the data wireless transmission antenna, the data wireless transmission antenna pass through fixation clamp and communication terminal fixed connection.
The fault indicator comprises a high-speed acquisition module, a wireless communication module, a data processing module and a power supply module.
The communication terminal comprises a fault judgment module, a fault distance monitoring module, a data transmission module, a fault alarm module, a double-RAM recording module, a data centralized processor, an intelligent positioning module, a Beidou GPS module, a self-checking and self-recovering module and an automatic reset module.
The positioning method of the power transmission line fault positioning device comprises the following steps:
step 1): a high-speed acquisition module of the fault indicator acquires three-phase current and voltage and zero-sequence current and voltage on the power transmission line in real time;
step 2): judging whether a fault occurs, if so, sensing CT to capture a fault waveform, otherwise, self-checking the state of the monitoring terminal and reporting the state to the communication terminal; then judging whether the crash occurs or not, if so, starting a self-recovery function, and then returning to the step 1), and if not, directly returning to the step 1);
step 3): wavelet analysis, wherein a data centralized processor of the communication terminal performs wavelet analysis;
step 4): judging the fault type, and judging the fault type by a fault judging module of the communication terminal, and then performing fault alarm and fault information recording;
step 5): fault location;
step 6): and uploading to a server.
In the step 5), fault location is carried out by locating fault points through a fault distance monitoring module of a communication terminal by adopting a double-end impedance method or an A-type and E-type traveling wave distance measurement method, and identifying the monitoring terminal and a Beidou GPS module positioning monitoring terminal through an intelligent positioning module to carry out auxiliary positioning on the fault points; the double-end impedance method in the step 5) comprises the following steps:
wherein
Are power frequency voltage vectors at two ends of the power transmission line respectively,
power frequency current vectors, Z, at both ends of the transmission linecIs the wave impedance, gamma is the propagation coefficient, l is the self-inductance; for a three-phase system, three-phase decoupling must be carried out, and the decoupling methods include ordered component transformation, Clark transformation, Wedpohl transformation and the like, and for a three-phase balance system (complete transposition), the ordered component decomposition can be adopted, and the decomposition formula is as follows:
wherein
Then, setting the asynchronous angle δ to perform sequence component decomposition on the formula (1), so as to obtain a distance measurement formula as follows:
wherein, the value of i can be 0, 1, 2, 1 delta, respectively representing zero sequence, positive sequence, negative sequence, positive sequence fault components, when three-phase asymmetric fault occurs, i can be 0, 1, 2, 1 delta; when three-phase symmetric faults occur, i can take 1 and 1 delta, so that the method can be used for different types of fault ranging and positioning; the double-end impedance method utilizes the voltage and the current at two ends of the power transmission line, so that the information quantity is greatly increased, the equation number has enough redundancy, the influence of the transition impedance on the distance measurement precision can be completely eliminated, the influence of the fault type and the system impedance is avoided, and the accurate fault positioning can be ensured.
The upper fixing groove is of a round-corner inverted U-shaped structure, the lower fixing groove is of a round-corner V-shaped structure, and the upper fixing groove and the lower fixing groove form a round-corner regular triangle structure.
The invention has the beneficial effects that: the monitoring terminal and the communication terminal are adopted, the monitoring terminal is fixed on a power transmission line, and the communication terminal is fixed on a tower or an iron tower; the wire groove is aligned to the power transmission line, the upper shell and the lower shell are correspondingly closed, the upper shell and the lower shell are fixedly connected through the fixing bolt, the upper fixing groove and the lower fixing groove are in close contact with the power transmission line, and the spring in the spring groove can prevent the power transmission line from being damaged due to the fact that the upper shell and the lower shell are excessively attached; the monitoring terminal is connected with the communication terminal through a wireless communication antenna, the communication terminal is connected with the server through a data wireless transmission antenna, and the monitoring terminal comprises a high-speed acquisition module, a data processing module, a wireless communication module and a power supply module; the high-speed acquisition module converts transient traveling wave information acquired by the induction CT into digital information for the data processing module to analyze, and can monitor the working transient information of the transmission line in real time; the data processing module reads the digital signals acquired by the high-speed acquisition module; the wireless communication module establishes data connection with the communication terminal; the power supply module and the power supply control chip control the power supply of the solar panel; the fault judging module of the communication terminal judges the types of line faults, including open circuit faults, low resistance faults, high resistance and flashover faults, transient faults, permanent faults, lightning faults and non-lightning faults; a fault distance monitoring module of the communication terminal positions a fault point by adopting a double-end impedance method or an A-type and E-type traveling wave distance measurement method, and identifies the monitoring terminal and a Beidou GPS module positioning monitoring terminal through an intelligent positioning module to assist in positioning the fault point; the invention has the advantages of simple structure, rapid and accurate positioning and convenient use.
Drawings
Fig. 1 is a schematic view of the overall structure of a monitoring terminal of the power transmission line fault positioning device of the present invention.
Fig. 2 is a front view of a monitoring terminal of the power transmission line fault positioning device of the invention, fig. 1.
Fig. 3 is a front view of a monitoring terminal of the power transmission line fault positioning device of the invention, fig. 2.
Fig. 4 is a schematic structural diagram of a fault indicator of the transmission line fault positioning device of the invention.
Fig. 5 is a schematic structural diagram of a communication terminal of the power transmission line fault positioning device of the present invention.
Fig. 6 is an enlarged view of a structure shown in fig. 5.
Fig. 7 is a block diagram showing the structure of a fault indicator of the transmission line fault location device of the present invention.
Fig. 8 is a block diagram showing the structure of the communication terminal of the power transmission line fault location device of the present invention.
Fig. 9 is a flowchart of the transmission line fault positioning device of the present invention.
In the figure: 1. the monitoring terminal 2, the upper shell 3, the lower shell 4, the connecting sleeve 5, the wireless communication antenna 6, the fixing bolt 7, the upper cover plate 8, the lower cover plate 9, the locking screw 10, the upper protective shell 11, the lower protective shell 12, the upper fixing groove 13, the lower fixing groove 14, the spring groove 15, the spring 16, the power transmission line 17, the fault indicator 171, the high-speed acquisition module 172, the wireless communication module 173, the data processing module 174, the power supply module 18, the induction CT 19, the wire casing 20, the power supply control chip 21, the limit column 22, the communication terminal 221, the fault judgment module 222, the fault distance monitoring module 223, the data transmission module 224, the fault alarm module 225, the dual-RAM recording module 226, the data centralized processor 227, the intelligent positioning module 228, the intelligent positioning module 229, the fault alarm module 229, the, Self-test and self-recovery module 230, automatic reset module 23, bottom plate 24, locking plate 25, solar panel 26, fixing clamp 27 and data wireless transmission antenna.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1-9, the power transmission line fault positioning device comprises a monitoring terminal 1, a power transmission line 16 and a communication terminal 22, wherein an upper shell 2 is arranged above the monitoring terminal 1, a connecting sleeve 4 is arranged at the rear of the left side above the upper shell 2, fixing bolts 6 are arranged at four corners above the upper shell 2, a lower shell 3 is arranged below the monitoring terminal 1, the upper shell 2 is fixedly connected with the lower shell 3 through the fixing bolts 6, an upper cover plate 7 and a lower cover plate 8 are respectively arranged at the front middle parts of the upper shell 2 and the lower shell 3, spring grooves 14 are respectively arranged at the left side and the right side of the inner sides below the upper cover plate 7 and the lower cover plate 8, springs 15 are respectively arranged in the spring grooves 14, locking screws 9 are respectively arranged at the left side and the right side of the front upper side of the upper cover plate 7 and the front side of the lower cover plate 8, and the upper cover plate 7 and the lower cover plate 8 are respectively fixedly connected with the upper shell 2 and the inner sides of the upper cover plate 7 and the lower cover plate 8 are respectively provided with an upper protective shell 10 and a lower protective shell 11, the inner sides of the upper protective shell 10 and the lower protective shell 11 are respectively provided with an upper fixing groove 12 and a lower fixing groove 13, the inner parts of the upper protective shell 10 and the lower protective shell 11 are respectively provided with a fault indicator 17, the inner parts of the fault indicators 17 are respectively provided with an induction CT 18, the inner parts of the induction CT 18 are respectively provided with a wire groove 19, the middle part of the lower part of the left side of the lower protective shell 11 is provided with a power control chip 20, the lower part of the right side of the upper protective shell 10 is provided with a wireless communication antenna 5, the left side of the upper part of the wireless communication antenna 5 is provided with a limiting column 21, and the wireless communication antenna 5 penetrates through the monitoring terminal 1 and is fixedly; communication terminal 22 below be provided with bottom plate 23, bottom plate 23 the left and right sides all be provided with lockplate 24, communication terminal 22 pass through lockplate 24 and bottom plate 23 fixed connection, communication terminal 22 top be provided with solar panel 25, communication terminal 22 the left and right sides top all be provided with fixation clamp 26, fixation clamp 26 top be provided with data wireless transmission antenna 27, data wireless transmission antenna 27 pass through fixation clamp 26 and communication terminal 22 fixed connection.
The fault indicator 17 includes a high-speed acquisition module 171, a wireless communication module 172, a data processing module 173, and a power module 174.
The communication terminal 22 comprises a fault judgment module 221, a fault distance monitoring module 222, a data transmission module 223, a fault alarm module 224, a double-RAM recording module 225, a data centralized processor 226, an intelligent positioning module 227, a Beidou GPS module 228, a self-checking and self-recovering module 229 and an automatic resetting module 230.
The invention adopts a monitoring terminal 1 and a communication terminal 22, the monitoring terminal 1 is fixed on a power transmission line 16, and the communication terminal 22 is fixed on a tower or an iron tower; the wire groove 19 is aligned with the power transmission line 16, the upper shell 2 and the lower shell 3 are correspondingly closed, the upper shell 2 and the lower shell 3 are fixedly connected through the fixing bolt 6, the upper fixing groove 12 and the lower fixing groove 13 are tightly contacted with the power transmission line 16, and the spring 15 in the spring groove 14 can prevent the power transmission line 16 from being damaged due to the fact that the upper shell 2 and the lower shell 3 are excessively attached; the monitoring terminal 1 is connected with the communication terminal 22 through the wireless communication antenna 5, the communication terminal 22 can be connected with a plurality of monitoring terminals 1, the communication terminal 22 is connected with a server through the data wireless transmission antenna 27, and the monitoring terminal 1 comprises a high-speed acquisition module 171, a data processing module 172, a wireless communication module 173 and a power supply module 174; the high-speed acquisition module 171 converts the transient traveling wave information acquired by the induction CT 18 into digital information for analysis by the data processing module 172, and the high-speed acquisition module 171 can monitor the transient information of the operation of the transmission line 16 in real time; the data processing module 172 reads the digital signal acquired by the high-speed acquisition module 171; the wireless communication module 173 establishes data connection with the communication terminal 22; the power supply module 174 and the power control chip 20 control the power supply of the solar panel 25; the fault judging module 221 of the communication terminal 22 judges the types of line faults, including open circuit faults, low resistance faults, high resistance and flashover faults, transient faults, permanent faults, lightning faults and non-lightning faults; the fault distance monitoring module 221 of the communication terminal 22 locates the fault point by adopting a double-end impedance method or an A-type and E-type traveling wave ranging method, and identifies the monitoring terminal 1 through the intelligent locating module 227 and locates the monitoring terminal 1 through the Beidou GPS module 228 to assist in locating the fault point; the invention has the advantages of simple structure, rapid and accurate positioning and convenient use.
Example 2
As shown in fig. 1-9, the power transmission line fault positioning device comprises a monitoring terminal 1, a power transmission line 16 and a communication terminal 22, wherein an upper shell 2 is arranged above the monitoring terminal 1, a connecting sleeve 4 is arranged at the rear of the left side above the upper shell 2, fixing bolts 6 are arranged at four corners above the upper shell 2, a lower shell 3 is arranged below the monitoring terminal 1, the upper shell 2 is fixedly connected with the lower shell 3 through the fixing bolts 6, an upper cover plate 7 and a lower cover plate 8 are respectively arranged at the front middle parts of the upper shell 2 and the lower shell 3, spring grooves 14 are respectively arranged at the left side and the right side of the inner sides below the upper cover plate 7 and the lower cover plate 8, springs 15 are respectively arranged in the spring grooves 14, locking screws 9 are respectively arranged at the left side and the right side of the front upper side of the upper cover plate 7 and the front side of the lower cover plate 8, and the upper cover plate 7 and the lower cover plate 8 are respectively fixedly connected with the upper shell 2 and the inner sides of the upper cover plate 7 and the lower cover plate 8 are respectively provided with an upper protective shell 10 and a lower protective shell 11, the inner sides of the upper protective shell 10 and the lower protective shell 11 are respectively provided with an upper fixing groove 12 and a lower fixing groove 13, the inner parts of the upper protective shell 10 and the lower protective shell 11 are respectively provided with a fault indicator 17, the inner parts of the fault indicators 17 are respectively provided with an induction CT 18, the inner parts of the induction CT 18 are respectively provided with a wire groove 19, the middle part of the lower part of the left side of the lower protective shell 11 is provided with a power control chip 20, the lower part of the right side of the upper protective shell 10 is provided with a wireless communication antenna 5, the left side of the upper part of the wireless communication antenna 5 is provided with a limiting column 21, and the wireless communication antenna 5 penetrates through the monitoring terminal 1 and is fixedly; communication terminal 22 below be provided with bottom plate 23, bottom plate 23 the left and right sides all be provided with lockplate 24, communication terminal 22 pass through lockplate 24 and bottom plate 23 fixed connection, communication terminal 22 top be provided with solar panel 25, communication terminal 22 the left and right sides top all be provided with fixation clamp 26, fixation clamp 26 top be provided with data wireless transmission antenna 27, data wireless transmission antenna 27 pass through fixation clamp 26 and communication terminal 22 fixed connection.
The fault indicator 17 includes a high-speed acquisition module 171, a wireless communication module 172, a data processing module 173, and a power module 174.
The communication terminal 22 comprises a fault judgment module 221, a fault distance monitoring module 222, a data transmission module 223, a fault alarm module 224, a double-RAM recording module 225, a data centralized processor 226, an intelligent positioning module 227, a Beidou GPS module 228, a self-checking and self-recovering module 229 and an automatic resetting module 230.
The positioning method of the power transmission line fault positioning device comprises the following steps:
step 1): the high-speed acquisition module 171 of the fault indicator 17 acquires three-phase current and voltage and zero-sequence current and voltage on the power transmission line in real time;
step 2): judging whether a fault occurs, if so, sensing the CT 18 to capture a fault waveform, otherwise, self-checking the state of the monitoring terminal 1 and reporting the state to the communication terminal 22; then judging whether the crash occurs or not, if so, starting a self-recovery function, and then returning to the step 1), and if not, directly returning to the step 1);
step 3): wavelet analysis, performed by the data-intensive processor 226 of the communication terminal 22;
step 4): judging the fault type, and a fault judging module 221 of the communication terminal 22 judges the fault type, and then performs fault alarm and fault information recording;
step 5): fault location;
step 6): and uploading to a server.
5. In the step 5), fault location is performed by locating a fault point through a fault distance monitoring module 222 of the communication terminal 22 by using a double-end impedance method or an a-type and E-type traveling wave distance measurement method, and identifying the monitoring terminal 1 through an intelligent locating module 227 and locating the monitoring terminal 1 through a Beidou GPS module 228 to assist in locating the fault point; the double-end impedance method in the step 5) comprises the following steps:
wherein
Are power frequency voltage vectors at two ends of the power transmission line respectively,
power frequency current vectors, Z, at both ends of the transmission linecIs the wave impedance, gamma is the propagation coefficient, l is the self-inductance;
for a three-phase system, three-phase decoupling must be carried out, and the decoupling methods include ordered component transformation, Clark transformation, Wedpohl transformation and the like, and for a three-phase balance system (complete transposition), the ordered component decomposition can be adopted, and the decomposition formula is as follows:
wherein
Then, setting the asynchronous angle δ to perform sequence component decomposition on the formula (1), so as to obtain a distance measurement formula as follows:
wherein, the value of i can be 0, 1, 2, 1 delta, respectively representing zero sequence, positive sequence, negative sequence, positive sequence fault components, when three-phase asymmetric fault occurs, i can be 0, 1, 2, 1 delta; when three-phase symmetric faults occur, i can take 1 and 1 delta, so that the method can be used for different types of fault ranging and positioning; the double-end impedance method utilizes the voltage and the current at two ends of the power transmission line, so that the information quantity is greatly increased, the equation number has enough redundancy, the influence of the transition impedance on the distance measurement precision can be completely eliminated, the influence of the fault type and the system impedance is avoided, and the accurate fault positioning can be ensured.
The upper fixing groove 12 is of a round-corner inverted U-shaped structure, the lower fixing groove 13 is of a round-corner V-shaped structure, and the upper fixing groove 13 and the lower fixing groove 13 form a round-corner regular triangle structure.
The invention adopts a monitoring terminal 1 and a communication terminal 22, the monitoring terminal 1 is fixed on a power transmission line 16, and the communication terminal 22 is fixed on a tower or an iron tower; the wire groove 19 is aligned with the power transmission line 16, the upper shell 2 and the lower shell 3 are correspondingly closed, the upper shell 2 and the lower shell 3 are fixedly connected through the fixing bolt 6, the upper fixing groove 12 and the lower fixing groove 13 are tightly contacted with the power transmission line 16, and the spring 15 in the spring groove 14 can prevent the power transmission line 16 from being damaged due to the fact that the upper shell 2 and the lower shell 3 are excessively attached; the monitoring terminal 1 is connected with the communication terminal 22 through the wireless communication antenna 5, the communication terminal 22 can be connected with a plurality of monitoring terminals 1, the communication terminal 22 is connected with a server through the data wireless transmission antenna 27, and the monitoring terminal 1 comprises a high-speed acquisition module 171, a data processing module 172, a wireless communication module 173 and a power supply module 174; the high-speed acquisition module 171 converts the transient traveling wave information acquired by the induction CT 18 into digital information for analysis by the data processing module 172, and the high-speed acquisition module 171 can monitor the transient information of the operation of the transmission line 16 in real time; the data processing module 172 reads the digital signal acquired by the high-speed acquisition module 171; the wireless communication module 173 establishes data connection with the communication terminal 22; the power supply module 174 and the power control chip 20 control the power supply of the solar panel 25; the fault judging module 221 of the communication terminal 22 judges the types of line faults, including open circuit faults, low resistance faults, high resistance and flashover faults, transient faults, permanent faults, lightning faults and non-lightning faults; the fault distance monitoring module 221 of the communication terminal 22 locates the fault point by adopting a double-end impedance method or an A-type and E-type traveling wave ranging method, and identifies the monitoring terminal 1 through the intelligent locating module 227 and locates the monitoring terminal 1 through the Beidou GPS module 228 to assist in locating the fault point; the monitoring terminal 1 is installed on a transmission line 16, a CT 18 is induced through a fault indicator terminal, a transient fault traveling wave waveform is captured, a mathematical model is established, the fault type of the current fault can be rapidly and accurately judged according to different fault traveling wave characteristics through wavelet analysis, and the monitoring terminal has extremely high intelligent identification capability on whether the fault is a lightning fault or a non-lightning fault, a shielding failure or a counterattack fault; the position of the fault point can be accurately calculated according to the time of the fault traveling wave to and from the fault point and the monitoring terminal; the invention has the advantages of simple structure, rapid and accurate positioning and convenient use.
Claims (6)
1. Transmission line fault positioning device, it includes monitor terminal, power transmission line and communication terminal, its characterized in that: the monitoring terminal is provided with an upper shell above, the rear part of the left side above the upper shell is provided with a connecting sleeve, four corners above the upper shell are provided with fixing bolts, the lower shell is arranged below the monitoring terminal, the upper shell is fixedly connected with the lower shell through the fixing bolts, the middle parts of the front parts of the upper shell and the lower shell are respectively provided with an upper cover plate and a lower cover plate, the left side and the right side of the inner side below the upper cover plate and the lower cover plate are respectively provided with a spring groove, the inner parts of the spring grooves are respectively provided with a spring, the left side and the right side of the front upper part of the upper cover plate and the left side of the front upper part of the lower cover plate are respectively provided with a locking screw, the upper cover plate and the lower cover plate are respectively fixedly connected with the upper shell and the lower shell through the locking screws, the inner sides of the upper cover plate and the lower cover plate are respectively provided with an upper fixing, fault indicators are arranged in the upper protective shell and the lower protective shell, induction CTs are arranged in the fault indicators, wire slots are arranged in the induction CTs, a power control chip is arranged in the middle of the lower portion of the left side of the lower protective shell, a wireless communication antenna is arranged below the right side of the upper protective shell, a limiting column is arranged on the left side above the wireless communication antenna, and the wireless communication antenna penetrates through a monitoring terminal and is fixedly connected with the monitoring terminal through a connecting sleeve; communication terminal below be provided with the bottom plate, the bottom plate left and right sides all be provided with the lockplate, communication terminal pass through lockplate and bottom plate fixed connection, communication terminal top be provided with solar panel, communication terminal left and right sides top all be provided with the fixation clamp, the fixation clamp top be provided with the data wireless transmission antenna, the data wireless transmission antenna pass through fixation clamp and communication terminal fixed connection.
2. The transmission line fault locating device of claim 1, characterized in that: the fault indicator comprises a high-speed acquisition module, a wireless communication module, a data processing module and a power supply module.
3. The transmission line fault locating device of claim 1, characterized in that: the communication terminal comprises a fault judgment module, a fault distance monitoring module, a data transmission module, a fault alarm module, a double-RAM recording module, a data centralized processor, an intelligent positioning module, a Beidou GPS module, a self-checking and self-recovering module and an automatic reset module.
4. The method of claim 1, wherein: the method comprises the following steps:
step 1): a high-speed acquisition module of the fault indicator acquires three-phase current and voltage and zero-sequence current and voltage on the power transmission line in real time;
step 2): judging whether a fault occurs, if so, sensing CT to capture a fault waveform, otherwise, self-checking the state of the monitoring terminal and reporting the state to the communication terminal; then judging whether the crash occurs or not, if so, starting a self-recovery function, and then returning to the step 1), and if not, directly returning to the step 1);
step 3): wavelet analysis, wherein a data centralized processor of the communication terminal performs wavelet analysis;
step 4): judging the fault type, and judging the fault type by a fault judging module of the communication terminal, and then performing fault alarm and fault information recording;
step 5): fault location;
step 6): and uploading to a server.
5. The transmission line fault locating device of claim 4, characterized in that: in the step 5), fault location is carried out by locating fault points through a fault distance monitoring module of a communication terminal by adopting a double-end impedance method or an A-type and E-type traveling wave distance measurement method, and identifying the monitoring terminal and a Beidou GPS module positioning monitoring terminal through an intelligent positioning module to carry out auxiliary positioning on the fault points; the double-end impedance method in the step 5) comprises the following steps:
wherein
Are power frequency voltage vectors at two ends of the power transmission line respectively,
power frequency current vectors, Z, at both ends of the transmission linecIs the wave impedance, gamma is the propagation coefficient, l is the self-inductance;
for a three-phase system, three-phase decoupling must be carried out, and the decoupling methods include ordered component transformation, Clark transformation, Wedpohl transformation and the like, and for a three-phase balance system (complete transposition), the ordered component decomposition can be adopted, and the decomposition formula is as follows:
wherein
Then, setting the asynchronous angle δ to perform sequence component decomposition on the formula (1), so as to obtain a distance measurement formula as follows:
wherein, the value of i can be 0, 1, 2, 1 delta, respectively representing zero sequence, positive sequence, negative sequence, positive sequence fault components, when three-phase asymmetric fault occurs, i can be 0, 1, 2, 1 delta; when three-phase symmetric faults occur, i can take 1 and 1 delta, so that the method can be used for different types of fault ranging and positioning; the double-end impedance method utilizes the voltage and the current at two ends of the power transmission line, so that the information quantity is greatly increased, the equation number has enough redundancy, the influence of the transition impedance on the distance measurement precision can be completely eliminated, the influence of the fault type and the system impedance is avoided, and the accurate fault positioning can be ensured.
6. The transmission line fault locating device of claim 1, characterized in that: the upper fixing groove is of a round-corner inverted U-shaped structure, the lower fixing groove is of a round-corner V-shaped structure, and the upper fixing groove and the lower fixing groove form a round-corner regular triangle structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011231502.7A CN112557809A (en) | 2020-11-06 | 2020-11-06 | Transmission line fault positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011231502.7A CN112557809A (en) | 2020-11-06 | 2020-11-06 | Transmission line fault positioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112557809A true CN112557809A (en) | 2021-03-26 |
Family
ID=75041554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011231502.7A Pending CN112557809A (en) | 2020-11-06 | 2020-11-06 | Transmission line fault positioning device |
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