Power transmission line fault positioning method and system

Abstract

The invention discloses a power transmission line fault positioning method and system, and relates to the technical field of fault positioning. A fault positioning module is arranged to carry out compression conversion on monitoring data and fault positioning information of all power transmission lines in a target transformer substation at a fault occurrence moment; the method comprises the following steps: cutting fault associated data in a binary format, analyzing the occurrence frequency of a plurality of groups of shunt arrays obtained after cutting, determining a compression interval, converting the shunt arrays into corresponding arrays of the same type according to the determined compression interval, and compressing four-bit binary numbers in 16 forms into eight types, so as to obtain the fault associated data. According to the method, the eight kinds of four-bit binary numbers are selected, and the eight kinds of four-bit binary numbers are replaced with short characters, so that the frequency of each four-bit binary number is increased while the kinds of the four-bit binary numbers are reduced, the compression amount of data is higher, the data volume of data transmission is effectively reduced, and the time for receiving the data by a far-end analysis center is further shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of fault location, and in particular to a method and system for locating a power transmission line fault. Background Art

[0002] In modern power systems, transmission lines are the key link in power transmission, and their safe and stable operation is of vital importance. However, since transmission lines are exposed to complex natural environments for a long time, they are affected by lightning strikes, wind disasters, ice and snow, aging and other factors, and failures occur from time to time.

[0003] When a fault event occurs, in order to comprehensively and accurately analyze the cause of the fault, it is necessary to transmit various monitoring data of the faulty transmission line and related monitoring data of other surrounding transmission lines to a remote analysis center. There are many transmission lines and they are widely distributed. The amount of data that needs to be transmitted in the event of a fault is huge. If it is directly transmitted without processing, it will cause a great burden on the communication network, which may cause data transmission delays, losses, and other problems, thereby affecting the timeliness of fault processing;

[0004] In this case, in order to transmit the data to the remote analysis center as quickly as possible, compressing the monitoring data has become an inevitable choice. At present, one way of data compression is to compress according to the frequency of occurrence of terms in the data. By specially encoding these high-frequency terms, the amount of data can be effectively reduced. However, in the actual transmission line monitoring data, a considerable part of the data exists in binary form. For these binary data, the current compression method based on term frequency has limitations. The high-frequency terms can be further converted to achieve the effect of reducing the high-frequency terms while increasing the frequency of occurrence of the high-frequency terms. However, the existing technology does not handle this aspect.

[0005] In order to solve the above problems, the present invention proposes a solution. Summary of the invention

[0006] The purpose of the present invention is to provide a method and system for locating a fault in a power transmission line, in order to solve the problems raised in the above background technology;

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A method for locating a transmission line fault comprises the following steps:

[0009] Step 1: The line monitoring module collects monitoring data of several transmission lines in the target substation in real time and transmits it to the line monitoring module. The monitoring data includes the measured values ​​of voltage and current at both ends of the transmission line. When a transmission line fails, the monitoring data also includes the time it takes for the traveling wave to reach both ends of the transmission line.

[0010] Step 2: The line monitoring module receives and traverses the monitoring data of all transmission lines in the target substation transmitted in real time. If there are some monitoring data containing the time when the traveling wave arrives at both ends of the transmission line among all the monitoring data received at a certain moment, the fault location information of the corresponding transmission line is first generated according to the monitoring data containing the time when the traveling wave arrives at both ends of the transmission line, and then the fault association data of the target substation is generated according to the generated fault location information of the several transmission lines and the monitoring data of all transmission lines in the target substation received at that moment;

[0011] Step three: After generating the fault-related data of the target substation, the fault location module compresses and converts the fault-related data of the target substation according to the preset compression conversion rules to obtain the compressed related data of the fault-related data, iterative compression identification data, characters 0, 1, 00, 01, 10, 11, 001, 111 and their corresponding four-bit binary numbers, and transmits them to the remote analysis center.

[0012] A transmission line fault location system, comprising:

[0013] The line monitoring module is used to collect the monitoring data of several transmission lines in the target substation in real time. The monitoring data includes the measured values ​​of voltage and current at both ends of the transmission line. When a transmission line fails, the monitoring data also includes the time it takes for the traveling wave to reach both ends of the transmission line.

[0014] The line monitoring module is used to traverse the monitoring data of all transmission lines in the target substation after receiving the real-time transmission. If there is a monitoring data that contains the time when the traveling wave arrives at both ends of the transmission line, the monitoring data of all transmission lines that contain the time when the traveling wave arrives at both ends of the transmission line are first extracted, and the fault location information of the corresponding transmission line is generated for each extracted monitoring array of the transmission line;

[0015] Then, the fault correlation data of the target substation is generated according to the generated fault location information of the plurality of transmission lines and the monitoring data of all transmission lines in the target substation received at that moment;

[0016] The fault location module compresses and converts the fault-related data of the target substation according to the preset compression conversion rules to obtain the compressed associated data, compressed identification data, characters 0, 1, 00, 01, 10, 11, 001, 111 and their corresponding four-bit binary numbers of the fault-related data, and transmits them to the remote analysis center.

[0017] Furthermore, measuring devices are installed at both ends of the transmission line, and the measuring devices include a voltage transformer, a current transformer, a traveling wave sensor and a synchronous clock unit.

[0018] Further, the compression conversion rules of the compressed associated data, iterative compressed identification data, characters 0, 1, 00, 01, 10, 11, 001, 111 and their corresponding four-bit binary numbers obtained by conversion are as follows:

[0019] S11: performing binary conversion on the fault-related data, and re-marking the converted data as location-related data;

[0020] S12: specifying a cutting step length of 4, cutting the positioning association data from left to right to obtain a plurality of group flow arrays, and marking all the group flow arrays obtained by cutting as A1, A2, ..., Aa, a≥1, from left to right according to the position of each group flow array in the positioning association data before cutting;

[0021] S13: traverse the shunt arrays A1, A2, ..., Aa, and count the number of shunt arrays whose decimal numbers are in the intervals [0,7] and [8,15], which are marked as B1 and B2 respectively;

[0022] S14: Compare B1 and B2, and determine the compression interval of the positioning associated data according to the comparison result, wherein if B1≥B2, determine the compression interval of the positioning associated data to be [8,15];

[0023] S15: selecting, according to the compression interval of the positioning associated data, a preset first conversion rule or a preset second conversion rule to obtain the same type arrays and the same type identifiers of the diversion arrays A1, A2, ..., Aa;

[0024] S16: marking the same type arrays of the shunt arrays A1, A2, ..., Aa as D1, D2, ..., Da in the order of the shunt arrays A1, A2, ..., Aa;

[0025] S17: selecting a mapping array of the same type of arrays D1, D2, ..., Da according to a preset first mapping rule or a preset second mapping rule according to the compression interval of the positioning associated data;

[0026] S18: in the order of the similar arrays D1, D2, ..., Da, the mapping arrays of the similar arrays D1, D2, ..., Da are concatenated to obtain the compressed associated data of the fault associated data,

[0027] Concatenate the same type of identifications of the same type of arrays D1, D2, ..., Da in the order of the same type of arrays D1, D2, ..., Da to obtain compressed identification data of the fault-related data;

[0028] The fault location data compresses the compression identification data of the fault association data using a compression algorithm to obtain iterative compression identification data of the fault association data.

[0029] Beneficial effects of the present invention:

[0030] The present invention compresses and converts the monitoring data and fault location information of all transmission lines in the target substation at the time of the fault by setting a fault location module. During the compression and conversion process, the fault-related data in binary format is cut, and the occurrence frequencies of several groups of shunt arrays obtained after the cutting are analyzed to determine the compression interval. The shunt array is converted into a corresponding array of the same type according to the determined compression interval. In this way, 16 forms of four-bit binary numbers are compressed into 8 types, and these 8 types of four-bit binary numbers are replaced with shorter characters. This method reduces the types of four-bit binary numbers while increasing the frequency of each four-bit binary number, so that the data compression amount is higher, the amount of data transmitted is effectively reduced, the time for the remote analysis center to receive data is further shortened, and the processing rate of the remote analysis center is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] Figure 1 It is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figure 1 As shown, a method and system for locating a power transmission line fault include a line monitoring module, a fault locating module and a remote analysis center;

[0035] The line monitoring module is used to collect monitoring data of several transmission lines in the target substation in real time, wherein the monitoring data includes the measured values ​​of voltage and current at both ends of the transmission line. When a transmission line fails, the monitoring data also includes the time when the traveling wave reaches both ends of the transmission line;

[0036] In this application, high-precision measuring devices are installed at both ends of the transmission line to synchronously collect the voltage and current signals of the transmission line;

[0037] In the present application, the measuring device includes but is not limited to a voltage transformer, a current transformer, a traveling wave sensor and a synchronous clock unit, wherein the synchronous clock unit is used to achieve high-precision synchronization of the measuring devices at both ends of the transmission line. In the present application, the synchronous clock unit utilizes the satellite timing function of the global positioning system (GPS) to obtain accurate time information by receiving satellite signals, and applies it to the clock calibration of the measuring device, so that the measurements at both ends are synchronized in time;

[0038] The line monitoring module transmits the monitoring data of all transmission lines in the target substation collected in real time to the fault location module;

[0039] The fault location module is used to locate the fault point of the transmission line where the fault occurs in the target substation. After receiving the monitoring data of all the transmission lines in the target substation transmitted in real time, the fault location module traverses the monitoring data. If there is a monitoring data that contains the time when the traveling wave arrives at both ends of the transmission line, the monitoring data of all the transmission lines that contain the time when the traveling wave arrives at both ends of the transmission line are first extracted. For each of the extracted monitoring arrays of the transmission line, the fault location algorithm is used to generate the fault location information of the corresponding transmission line, wherein the fault location information includes the distances of the fault point from the two ends of the corresponding transmission line and the longitude and latitude data of the fault point;

[0040] Then, the fault correlation data of the target substation is generated according to the generated fault location information of the plurality of transmission lines and the monitoring data of all transmission lines in the target substation received at that moment;

[0041] If there is no monitoring data containing the time when the traveling wave arrives at both ends of the transmission line, no processing is performed;

[0042] The fault location module compresses and converts the fault-related data of the target substation according to a preset compression conversion rule to obtain compressed associated data and compressed identification data of the fault-related data. The compression conversion rule is as follows:

[0043] S11: performing binary conversion on the fault-related data, and re-marking the converted data as location-related data;

[0044] S12: specifying a cutting step length of 4, cutting the positioning association data from left to right to obtain a plurality of group flow arrays, and marking all the group flow arrays obtained by cutting as A1, A2, ..., Aa, a≥1, from left to right according to the position of each group flow array in the positioning association data before cutting;

[0045] S13: traverse the shunt arrays A1, A2, ..., Aa, and count the number of shunt arrays whose decimal numbers are in the intervals [0,7] and [8,15], which are marked as B1 and B2 respectively;

[0046] S14: Compare B1 and B2, and determine the compression interval of the positioning associated data according to the comparison result, wherein if B1≥B2, determine the compression interval of the positioning associated data to be [8,15];

[0047] S15: According to the compression interval of the positioning associated data, a preset first conversion rule or a preset second conversion rule is selected to obtain the same type array and the same type identification of the shunt array A1, A2, ..., Aa, wherein if the compression interval is [0,7], the first conversion rule for obtaining the same type array and the same type identification of the shunt array A1, A2, ..., Aa is as follows:

[0048] SS11: If the decimal number of the shunt array A1 is within the compression interval [0,7], the shunt array A1 itself is used as the same type array of the shunt array A1, and the character 0 is used as the same type identifier of the shunt array A1;

[0049] If the decimal number of the shunt array A1 is not within the compression interval [0,7], the shunt array A1 is taken as the complement of the four-bit signed binary number, the absolute value of the decimal number of the shunt array A1 is obtained, the four-bit binary number of the absolute value is obtained, the four-bit binary number is taken as the same type array of the shunt array A1, and the character 1 is taken as the same type identifier of the shunt array A1, wherein the four-bit binary number of the absolute value of -8 is 0000;

[0050] It should be noted here that when the shunt array A1 is 1000, 1001, 1010, 1011, 1100, 1101, 1110, 1111, the corresponding decimal numbers as the complement of a signed binary number are -8, -1, -2, -3, -4, -5, -6, -7;

[0051] SS12: Obtain the same type arrays and the same type identifiers of the shunt arrays A2, A3, ..., Aa in sequence according to SS11;

[0052] If the compression interval is [8, 15], the second conversion rule for obtaining the same type arrays and the same type identifiers of the shunt arrays A1, A2, ..., Aa is as follows:

[0053] SS21: If the decimal number of the shunt array A1 is within the compression interval [8,15], the shunt array A1 itself is used as the same type array of the shunt array A1, and the character 0 is used as the same type identifier of the shunt array A1;

[0054] If the decimal number of the shunt array A1 is not within the compression interval [8,15], first obtain the decimal number C1 of the shunt array A1, use the four-bit binary number of C1+8 as the same type array of the shunt array A1, and use the character 1 as the same type identifier of the shunt array A1;

[0055] SS22: Obtain the same type arrays and the same type identifiers of the diversion arrays A2, A3, ..., Aa in sequence according to SS11;

[0056] S16: marking the same type arrays of the shunt arrays A1, A2, ..., Aa as D1, D2, ..., Da in the order of the shunt arrays A1, A2, ..., Aa;

[0057] S17: According to the compression interval of the positioning associated data, a mapping array of the same type arrays D1, D2, ..., Da is obtained according to a preset first mapping rule or a preset second mapping rule, wherein if the compression interval is [0,7], the first mapping rule for obtaining the mapping array of the same type arrays D1, D2, ..., Da is as follows:

[0058] SS31: Traverse the same arrays D1, D2, ..., Da, and obtain the total number of the same arrays that are consistent with the four-bit binary numbers 0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111 in turn, and mark them as E1, E2, ..., E8. At this time, the total number E1, E2, ..., E8 is associated with the four-bit binary numbers 0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111 respectively;

[0059] SS32: Re-label the total quantities E1, E2, ..., E8 in descending order as F1, F2, ..., F8;

[0060] SS33: Obtain a four-bit binary number associated with the total quantity F1, and use character 0 as the mapping string of the four-bit binary number. Similarly, use characters 1, 00, 01, 10, 11, 001, 111 as the mapping strings of the four-bit binary numbers corresponding to the total quantities F2, F3, ..., F8;

[0061] SS34: Get the mapping string of the four-bit binary number that is consistent with the same type array D1,

[0062] The mapping string is used as a mapping array of the same type array D1;

[0063] SS35: Obtain the mapping arrays of the same type of arrays D1, D2, ..., Da in turn according to SS34;

[0064] If the compression interval is [8, 15], the second mapping rule for obtaining the mapping arrays of the same type of arrays D1, D2, ..., Da is as follows:

[0065] SS41: Traverse the same type of arrays D1, D2, ..., Da, and obtain the total number of the same type of arrays that are consistent with the four-bit binary numbers 1000, 1001, 1010, 1011, 1100, 1101, 1110, 1111 in turn, and mark them as G1, G2, ..., G8. At this time, the total number G1, G2, ..., G8 is associated with the four-bit binary numbers 1000, 1001, 1010, 1011, 1100, 1101, 1110, 1111 respectively;

[0066] SS42: Re-label the total quantities G1, G2, ..., G8 in descending order as H1, H2, ..., H8;

[0067] SS43: Obtain a four-bit binary number associated with the total quantity H1, and use character 0 as the mapping string of the four-bit binary number. Similarly, use characters 1, 00, 01, 10, 11, 001, 111 as the mapping strings of the four-bit binary numbers corresponding to the total quantities H2, H3, ..., H8;

[0068] SS44: Obtain a mapping string of a four-bit binary number that is consistent with the same type array D1, and use the mapping string as a mapping array of the same type array D1;

[0069] SS45: Obtain the mapping arrays of the same type of arrays D1, D2, ..., Da in sequence according to SS44;

[0070] S18: in the order of the similar arrays D1, D2, ..., Da, the mapping arrays of the similar arrays D1, D2, ..., Da are concatenated to obtain the compressed associated data of the fault associated data,

[0071] Concatenate the same type of identifications of the same type of arrays D1, D2, ..., Da in the order of the same type of arrays D1, D2, ..., Da to obtain compressed identification data of the fault-related data;

[0072] The fault location data compresses the compression identification data of the fault association data using a compression algorithm to obtain iterative compression identification data of the fault association data, and the compression algorithm in this application is Huffman coding;

[0073] The fault location module transmits the compressed associated data of the fault associated data, the iteratively compressed identification data, and the characters 0, 1, 00, 01, 10, 11, 001, 111 and their corresponding four-bit binary numbers to a remote analysis center;

[0074] The remote analysis center is used to receive and restore the fault-related data of the target substation. After receiving the compressed associated data, iterative compressed identification data, characters 0, 1, 00, 01, 10, 11, 001, 111 and their corresponding four-bit binary numbers of the transmitted fault-related data, the remote analysis center first restores the compressed identification data to obtain compressed identification data, and restores the compressed associated data according to the compressed identification data and the characters 0, 1, 00, 01, 10, 11, 001, 111 and their corresponding four-bit binary numbers to obtain the fault-related data, stores the fault-related data, and uses a sound alarm to notify the associated personnel of the remote analysis center to view it, so as to facilitate the analysis of whether the transmission line where the fault occurs in the target substation is related to other transmission lines;

[0075] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0076] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways. As long as they do not deviate from the scope defined by the invention, they shall all fall within the protection scope of the present invention.

[0077] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for locating a transmission line fault, characterized in that: The following steps are involved: Step 1: The line monitoring module collects monitoring data of several transmission lines in the target substation in real time and transmits it to the line monitoring module. The monitoring data includes the measured values ​​of voltage and current at both ends of the transmission line. When a transmission line fails, the monitoring data also includes the time it takes for the traveling wave to reach both ends of the transmission line. Step 2: The line monitoring module receives and traverses the monitoring data of all transmission lines in the target substation transmitted in real time. If there are some monitoring data containing the time when the traveling wave arrives at both ends of the transmission line among all the monitoring data received at a certain moment, the fault location information of the corresponding transmission line is first generated according to the monitoring data containing the time when the traveling wave arrives at both ends of the transmission line, and then the fault association data of the target substation is generated according to the generated fault location information of the several transmission lines and the monitoring data of all transmission lines in the target substation received at that moment; Step three: After generating the fault-related data of the target substation, the fault location module compresses and converts the fault-related data of the target substation according to the preset compression conversion rules to obtain the compressed related data of the fault-related data, iterative compression identification data, characters 0, 1, 00, 01, 10, 11, 001, 111 and their corresponding four-bit binary numbers, and transmits them to the remote analysis center.

2. A transmission line fault location system, characterized in that: include: The line monitoring module is used to collect the monitoring data of several transmission lines in the target substation in real time. The monitoring data includes the measured values ​​of voltage and current at both ends of the transmission line. When a transmission line fails, the monitoring data also includes the time it takes for the traveling wave to reach both ends of the transmission line. The line monitoring module is used to traverse the monitoring data of all transmission lines in the target substation after receiving the real-time transmission. If there is a monitoring data that contains the time when the traveling wave arrives at both ends of the transmission line, the monitoring data of all transmission lines that contain the time when the traveling wave arrives at both ends of the transmission line are first extracted, and the fault location information of the corresponding transmission line is generated for each extracted monitoring array of the transmission line; Then, the fault correlation data of the target substation is generated according to the generated fault location information of the plurality of transmission lines and the monitoring data of all transmission lines in the target substation received at that moment; The fault location module compresses and converts the fault-related data of the target substation according to the preset compression conversion rules to obtain the compressed associated data, compressed identification data, characters 0, 1, 00, 01, 10, 11, 001, 111 and their corresponding four-bit binary numbers of the fault-related data, and transmits them to the remote analysis center.

3. A transmission line fault location system according to claim 2, characterized in that: Measuring devices are installed at both ends of the transmission line, including voltage transformers, current transformers, traveling wave sensors and synchronous clock units.

4. A transmission line fault location system according to claim 2, characterized in that: The compression conversion rules of the compressed associated data, iterative compressed identification data, characters 0, 1, 00, 01, 10, 11, 001, 111 and their corresponding four-bit binary numbers obtained by conversion are as follows: S11: performing binary conversion on the fault-related data, and re-marking the converted data as location-related data; S12: specifying a cutting step length of 4, cutting the positioning association data from left to right to obtain a plurality of group flow arrays, and marking all the group flow arrays obtained by cutting as A1, A2, ..., Aa, a≥1, from left to right according to the position of each group flow array in the positioning association data before cutting; S13: traverse the shunt arrays A1, A2, ..., Aa, and count the number of shunt arrays whose decimal numbers are in the intervals [0,7] and [8,15], which are marked as B1 and B2 respectively; S14: Compare B1 and B2, and determine the compression interval of the positioning associated data according to the comparison result, wherein if B1≥B2, determine the compression interval of the positioning associated data to be [8,15]; S15: selecting, according to the compression interval of the positioning associated data, a preset first conversion rule or a preset second conversion rule to obtain a similar array and a similar identifier of the diversion arrays A1, A2, ..., Aa; S16: Marking the same type arrays of the shunt arrays A1, A2, ..., Aa as D1, D2, ..., Da in the order of the shunt arrays A1, A2, ..., Aa; S17: selecting a mapping array of the same type of arrays D1, D2, ..., Da according to a preset first mapping rule or a preset second mapping rule according to the compression interval of the positioning associated data; S18: in the order of the similar arrays D1, D2, ..., Da, the mapping arrays of the similar arrays D1, D2, ..., Da are concatenated to obtain the compressed associated data of the fault associated data, Concatenate the same type of identifications of the same type of arrays D1, D2, ..., Da in the order of the same type of arrays D1, D2, ..., Da to obtain compressed identification data of the fault-related data; The fault location data compresses the compression identification data of the fault association data using a compression algorithm to obtain iterative compression identification data of the fault association data.

5. A transmission line fault location system according to claim 2, characterized in that: S15, obtaining the first conversion rule of the same type arrays and the same type identifiers of the diversion arrays A1, A2, ..., Aa is as follows: SS11: If the decimal number of the shunt array A1 is within the compression interval [0,7], the shunt array A1 itself is used as the same type array of the shunt array A1, and the character 0 is used as the same type identifier of the shunt array A1; If the decimal number of the shunt array A1 is not within the compression interval [0,7], the shunt array A1 is taken as the complement of the four-bit signed binary number, the absolute value of the decimal number of the shunt array A1 is obtained, the four-bit binary number of the absolute value is obtained, the four-bit binary number is taken as the same type array of the shunt array A1, and the character 1 is taken as the same type identifier of the shunt array A1, wherein the four-bit binary number of the absolute value of -8 is 0000; When the shunt array A1 is 1000, 1001, 1010, 1011, 1100, 1101, 1110, 1111, the corresponding decimal numbers as the complement of a signed binary number are -8, -1, -2, -3, -4, -5, -6, -7. SS12: According to SS11, similar arrays and similar identifiers of the diversion arrays A2, A3, ..., Aa are obtained in sequence.

6. A transmission line fault location system according to claim 4, characterized in that: S15, obtaining the second conversion rule of the same type arrays and the same type identifiers of the diversion arrays A1, A2, ..., Aa is as follows: SS21: If the decimal number of the shunt array A1 is within the compression interval [8,15], the shunt array A1 itself is used as the same type array of the shunt array A1, and the character 0 is used as the same type identifier of the shunt array A1; If the decimal number of the shunt array A1 is not within the compression interval [8,15], first obtain the decimal number C1 of the shunt array A1, use the four-bit binary number of C1+8 as the same type array of the shunt array A1, and use the character 1 as the same type identifier of the shunt array A1; SS22: According to SS11, the same type arrays and the same type identifiers of the diversion arrays A2, A3, ..., Aa are obtained in sequence.

7. A transmission line fault location system according to claim 5, characterized in that: S17, if the compression interval is [0,7], the first mapping rule of the mapping arrays of the same type arrays D1, D2, ..., Da is obtained as follows: SS31: Traverse the same arrays D1, D2, ..., Da, and obtain the total number of the same arrays that are consistent with the four-bit binary numbers 0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111 in turn, and mark them as E1, E2, ..., E8. At this time, the total number E1, E2, ..., E8 is associated with the four-bit binary numbers 0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111 respectively; SS32: Re-label the total quantities E1, E2, ..., E8 in descending order as F1, F2, ..., F8; SS33: Obtain a four-bit binary number associated with the total quantity F1, and use character 0 as the mapping string of the four-bit binary number. Similarly, use characters 1, 00, 01, 10, 11, 001, 111 as the mapping strings of the four-bit binary numbers corresponding to the total quantities F2, F3, ..., F8; SS34: Obtain a mapping string of a four-bit binary number that is consistent with the same type array D1, and use the mapping string as a mapping array of the same type array D1; SS35: According to SS34, the mapping arrays of the same type arrays D1, D2, ..., Da are obtained in sequence.

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