A transmission line fault information fusion ranging system and method

Abstract

The invention relates to a transmission line fault information fusion ranging system and method. The system comprises: a signal monitoring and processing module monitors and obtains hardware traveling wave data with time stamp, voltage traveling wave recording data, current traveling wave recording data and zero-sequence voltage data; an information sharing interface module obtains the transmission line circuit breaker event sequence record of the substation and the substation line topology information; a fault traveling wave ranging module calculates and obtains at least one fault location result according to the event sequence record, the substation line topology information, the zero-sequence voltage data with time stamp, the voltage traveling wave recording data, the current traveling wave recording data and the hardware traveling wave data; an information fusion ranging analysis module performs comprehensive ranging analysis on at least one fault location result of the fault traveling wave ranging module according to the action and action circuit recorded in the event sequence, and the voltage level of the action circuit, and selects the precise position of the real fault point from the at least one fault location result, so that the fault location is more effective and accurate.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric power systems, and in particular relates to a transmission line fault information fusion ranging system and method. Background Art

[0002] Intelligent monitoring of transmission line status is an important means of line operation and inspection. Accurate distance measurement of transmission line faults is conducive to line fault inspection. The existing fault distance measurement methods for power system transmission lines include fault distance measurement of relay protection systems, fault distance measurement of wave recording devices, lightning fault distance measurement of lightning location systems, and distributed fault diagnosis systems for transmission lines using traveling wave location methods and network traveling wave distance measurement systems.

[0003] The fault distance measurement method of the relay protection system and the recording device is the impedance distance measurement method, and the fault distance measurement error is 2% of the line length; the lightning location system uses the lightning location method to locate the lightning point near the line tower, and cannot accurately identify the line flashover point and non-lightning fault distance measurement; the transmission line distributed fault distance measurement device is installed on the transmission line, and power outage is required during installation. The current transformer induction power supply is affected by the load current of the transmission line, and the operation is unreliable; the network traveling wave distance measurement system is divided into the transmission network fault current traveling wave distance measurement method and the voltage traveling wave distance measurement method. The current traveling wave distance measurement method collects the current traveling wave of the series line current transformer secondary side access, which may affect the relay protection of the substation Device or measurement and control device operation; voltage traveling wave ranging method voltage traveling wave collection uses a special traveling wave sensor connected to the grounding wire of capacitive equipment such as capacitive voltage transformer in the substation. The switch signal needs to be connected from the terminal end of the line circuit breaker. The fault traveling wave signal collection device is installed in the substation control room, and the bus or line voltage transformer and line circuit breaker are outside the substation room. The signal transmission coaxial cable layout of the traveling wave sensor and the laying of the control cable for switch signal transmission all require off-site civil construction of the substation. The Beidou satellite navigation system BDS or global positioning system GPS timing module of the fault traveling wave signal collection device is troublesome to install and easy to damage, resulting in a long construction period.

[0004] It can be seen that the use of the above systems for fault distance measurement has its own defects, and the fault distance measurement results are not shared and analyzed, making it impossible to effectively and accurately locate faults in transmission lines. Summary of the invention

[0005] In order to make up for the defects of the prior art, the present invention provides a transmission line fault information fusion ranging system and method.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] In a first aspect, a transmission line fault information fusion ranging system is provided, comprising:

[0008] Signal monitoring and processing module, information sharing interface module, fault traveling wave ranging module and information fusion ranging analysis module;

[0009] The signal monitoring and processing module is used to monitor the busbar and transmission line voltage traveling wave signals, transmission line current traveling wave signals and zero-sequence voltage signals in the substation; the busbar and transmission line voltage traveling wave signals, transmission line current traveling wave signals and zero-sequence voltage signals are processed to obtain hardware traveling wave data with time stamp, voltage traveling wave recording data, current traveling wave recording data and zero-sequence voltage data;

[0010] An information sharing interface module is used to obtain the event sequence record of the transmission line circuit breaker of the substation and the substation line topology information;

[0011] A fault traveling wave location module is used to calculate at least one fault location result based on the event sequence record, substation line topology information, zero-sequence voltage data with time stamp, voltage traveling wave recording data with time stamp, current traveling wave recording data with time stamp, and hardware traveling wave data with time stamp;

[0012] The information fusion ranging analysis module is used to perform comprehensive ranging analysis on at least one fault location result of the fault traveling wave ranging module according to the actions and action circuits recorded in the event sequence, and the voltage level of the action circuit, and to extract the precise position of the real fault point from at least one fault location result.

[0013] Furthermore, the signal monitoring and processing module includes:

[0014] A first monitoring unit, a second monitoring unit, a third monitoring unit, a fourth monitoring unit and a signal processing unit;

[0015] The first monitoring unit is connected in parallel with the secondary sides of the bus voltage transformer and the line voltage transformer of the monitoring substation, and is used to monitor the bus and transmission line voltage traveling wave signals;

[0016] The second monitoring unit uses a micro sensor to be sleeved on the secondary side wire of the line current transformer to monitor the current traveling wave signal of the transmission line;

[0017] The third monitoring unit is connected in parallel with the open delta secondary side of the bus voltage transformer and is used to monitor the zero-sequence voltage signal;

[0018] The fourth monitoring unit is connected to the clock system of the substation to obtain the timing information of the clock system, which includes the time information and second pulse signal of the Beidou satellite navigation system BDS or the global positioning system GPS;

[0019] The signal processing unit is used to condition and time the bus and transmission line voltage traveling wave signals, transmission line current traveling wave signals and zero-sequence voltage signals according to the timing information, and obtain hardware traveling wave data with time stamp, voltage traveling wave recording data, current traveling wave recording data and zero-sequence voltage data.

[0020] Furthermore, the information sharing interface module includes:

[0021] Relay protection related system data sharing interface unit and business middle platform data sharing interface unit;

[0022] The relay protection related system data sharing interface unit is connected to the relay protection related system and is used to read the event sequence record of the transmission line circuit breaker from the relay protection related system. The event sequence record includes the action of the transmission line circuit breaker, the time corresponding to the action and the line;

[0023] The business middle station data sharing interface unit is connected to the business middle station and is used to read the substation line topology information from the business middle station. The substation line topology information includes the substation name and substation number, the line name and line number of all lines in the substation, the circuit breaker name and circuit breaker number of the transmission line circuit breaker, the tower name and tower number of each tower on the line, and the line distance between adjacent towers.

[0024] Furthermore, the fault traveling wave ranging module includes:

[0025] An event sequence record analysis unit is used to extract the actions of the transmission line circuit breaker and the corresponding time points and action lines according to the event sequence records; the actions include opening actions and closing actions;

[0026] A zero-sequence voltage crossing event unit is used to compare the zero-sequence voltage data with a preset voltage value. When the effective value of the cycle of a data point in the zero-sequence voltage data is greater than the preset voltage value, it is regarded as a zero-sequence voltage crossing start event. The time point when the effective value of the cycle of a data point in the zero-sequence voltage data is greater than the preset voltage value for the first time is regarded as a zero-sequence voltage crossing start event time point; when the effective value of the cycle of a data point in the zero-sequence voltage data is less than the preset voltage value for the first time, it is regarded as a zero-sequence voltage crossing end event.

[0027] The hardware traveling wave effective grouping unit is used to group the hardware traveling wave data according to a preset micro-time period to obtain multiple traveling wave groups, calculate the number of traveling waves in each traveling wave group, and the maximum group is the effective traveling wave first wave group;

[0028] The voltage traveling wave recording data traveling wave first wave identification unit is used to identify the voltage traveling wave waveform in the voltage traveling wave recording data, and extract the first wave time and first wave polarity of the voltage traveling wave after removing the interference wave;

[0029] A current traveling wave recording data traveling wave first wave identification unit is used to identify the current traveling wave waveform in the current traveling wave recording data, and extract the first wave time and first wave polarity of the current traveling wave after removing the interference wave;

[0030] The current traveling wave fault partitioning and ranging unit is used to identify the current traveling wave recording data of the substations at both ends of the sub-action line according to the sub-action corresponding to the sub-action, obtain the polarity of the first wave of the current traveling wave according to the traveling wave first wave identification unit of the current traveling wave recording data, and judge the fault interval; based on the fault interval, the first wave time of the current traveling wave, the line length of the sub-action line and the preset traveling wave speed are obtained according to the traveling wave first wave identification unit of the current traveling wave recording data, and the fault location result is calculated by using the double-end traveling wave location method;

[0031] and,

[0032] The voltage traveling wave fault distance measuring unit is used to identify the voltage traveling wave recording data of the substations at both ends of the sub-action line according to the sub-action line corresponding to the sub-action, and calculate the fault location result using the double-end traveling wave positioning method according to the first wave time of the voltage traveling wave of the voltage traveling wave recording data traveling wave first wave identification unit, the line length of the sub-action line and the preset traveling wave speed;

[0033] and,

[0034] The hardware traveling wave precise distance measuring unit is used to identify the hardware traveling wave data of the substations at both ends of the sub-action line according to the sub-action line corresponding to the sub-action; based on the first wave time of the effective traveling wave first wave group of the hardware traveling wave effective grouping unit within the first wave time period of the voltage traveling wave or the current traveling wave, as well as the line length of the sub-action line and the preset traveling wave speed, the fault location result is calculated using the double-end traveling wave positioning method.

[0035] Furthermore, the calculation formula of the double-terminal traveling wave positioning method is:

[0036] , L Mf is the distance from substation M to fault point f; L MN is the length of the branch line between substation M and substation N; t M is the first wave time of the voltage wave or current wave of substation M; t N is the first wave time of the voltage traveling wave or current traveling wave of substation N; v is the preset traveling wave velocity.

[0037] Furthermore, the information fusion ranging analysis module includes:

[0038] A voltage level judgment unit is used to judge whether the voltage level of the sub-action circuit corresponding to the sub-action is 110kV or above or 35kV;

[0039] A 110kV and above voltage level transmission line fault distance comprehensive analysis unit, used to obtain the precise location of the real fault point based on the transmission line fault distance comprehensive unit when the voltage level is 110kV and above;

[0040] The transmission line fault ranging integrated unit is used to advance the first preset time period forward according to the sub-action lines and sub-action time points corresponding to the sub-actions, and to extract the time-stamped hardware traveling wave data, time-stamped current traveling wave recording data and time-stamped voltage traveling wave recording data of the substations at both ends of the sub-action lines within the first preset time period. According to the fault location results of the hardware traveling wave precise ranging unit, the fault location results of the current traveling wave fault partition and ranging unit and the fault location results of the voltage traveling wave fault ranging unit, a first result set is obtained; the result with the highest probability in the first result set is taken as the precise position of the real fault point.

[0041] Furthermore, the information fusion ranging analysis module also includes:

[0042] 35kV transmission line fault diagnosis unit, used when the voltage level is 35kV, according to the sub-action line and the sub-action time point, push the sub-action time point forward to the first system set time period, and extract the current traveling wave recording data, voltage traveling wave recording data and hardware traveling wave data with time stamps of the substations at both ends of the sub-action line connected within the first system set time period;

[0043] The 35kV transmission line fault diagnosis unit is also used to determine whether there is a corresponding closing action within the second system set time period after the split action; if there is a closing action outside the second system set time period, the fault type of the fault location result is determined to be a single-phase grounding fault; determine whether there is a zero-sequence voltage crossing event, if there is a zero-sequence voltage crossing event, use the split action line as the fault calculation line, combine the split action time point, use the zero-sequence voltage fault ranging comprehensive unit to obtain the fault location position, calculate all zero-sequence voltage crossing events, and fit all fault location positions to obtain the precise position of the real fault point; if there is no zero-sequence voltage crossing event, use the split action line as the fault calculation line, combine the split action time point, and use the fault location position obtained by the transmission line fault ranging comprehensive unit as the precise position of the real fault point;

[0044] The integrated zero-sequence voltage fault ranging unit is used to use the sub-action line as the fault calculation line; take the sub-action time point as the starting point, and use the zero-sequence voltage out-of-bounds event unit to obtain the zero-sequence voltage out-of-bounds event within the third preset time period, and obtain multiple zero-sequence voltage out-of-bounds events; use the time point of the zero-sequence voltage out-of-bounds event as the fault calculation time point, and obtain the second result set according to the fault location results of the current traveling wave fault partition and ranging unit, the fault location results of the voltage traveling wave fault ranging unit, and the fault location results of the hardware waveform precise ranging unit; the result with the highest probability in the second result set is used as the precise position of the real fault point.

[0045] Furthermore, the information fusion ranging analysis module also includes:

[0046] The 35kV transmission line fault diagnosis unit is also used to determine whether there is a zero-sequence voltage out-of-bounds event if there is a closing action within the second system set time period, and if there is no zero-sequence voltage out-of-bounds event, determine that the fault type of the fault location result is a phase-to-phase short circuit fault, use the sub-action line as the fault calculation line, combine the sub-action time point, and use the fault location position obtained by the transmission line fault ranging integrated unit as the precise position of the real fault point; if there is a zero-sequence voltage out-of-bounds event, determine whether there is a sub-action of the transmission line circuit breaker of the second line within the fourth system set time period;

[0047] The 35kV transmission line fault diagnosis unit is further used for determining that the fault type of the fault location result is a phase-to-phase short circuit grounding fault if there is no sub-action of the transmission line circuit breaker of the second line within the fourth system set time period, taking the sub-action line as the fault calculation line, combining the sub-action time point, using the transmission line fault ranging comprehensive unit to obtain the fault location position F1, and then using the zero-sequence voltage fault ranging comprehensive unit to obtain the fault location position F2, taking the system set error distance δ as the boundary, if |F1-F2|<δ, then selecting the fault location position F1 as the precise position of the real fault point; if |F1-F2|≥δ, then both the fault location position F1 and the fault location position F2 are used as the precise position of the real fault point;

[0048] The 35kV transmission line fault diagnosis unit is also used for determining that the fault type of the fault location result is a non-lightning phase-to-phase short-circuit grounding fault if the transmission line circuit breaker on the second line has a sub-action within the fourth system set time period, and taking the sub-action line L1 and the sub-action line L2 as fault calculation lines, and combining the corresponding sub-action time points, using the transmission line fault ranging comprehensive unit to obtain the L1 fault location position and the L2 fault location position; if the L1 fault location position is the entire length of the sub-action line L1, and the L2 fault location position is on the line of the sub-action line L2, then the L2 fault location position is used as the precise position of the real fault point of the sub-action line L2; and then using the zero-sequence voltage fault ranging comprehensive unit to obtain the fault location position of the sub-action line L1, calculate all zero-sequence voltage out-of-bounds events, and fit the fault location positions of all sub-action lines L1 to obtain the precise position of the real fault point of the sub-action line L1.

[0049] In a second aspect, a transmission line fault information fusion ranging method is provided, which is applied to the transmission line fault information fusion ranging system in the first aspect, and the method includes:

[0050] The signal monitoring and processing module monitors the busbar and transmission line voltage traveling wave signals, transmission line current traveling wave signals and zero-sequence voltage signals in the substation; processes the busbar and transmission line voltage traveling wave signals, transmission line current traveling wave signals and zero-sequence voltage signals to obtain hardware traveling wave data with time stamp, voltage traveling wave recording data, current traveling wave recording data and zero-sequence voltage data;

[0051] The information sharing interface module obtains the event sequence record of the transmission line circuit breaker of the substation and the substation line topology information;

[0052] The fault traveling wave location module calculates at least one fault location result according to the event sequence record, substation line topology information, zero-sequence voltage data with time stamp, voltage traveling wave recording data with time stamp, current traveling wave recording data with time stamp, and hardware traveling wave data with time stamp;

[0053] The information fusion ranging analysis module performs a comprehensive ranging analysis on at least one fault location result of the fault traveling wave ranging module according to the actions and action circuits recorded in the event sequence, and the voltage level of the action circuit, and selects the precise position of the real fault point from at least one fault location result.

[0054] The beneficial effects achieved by the present invention are:

[0055] The signal monitoring and processing module monitors the busbar and transmission line voltage traveling wave signals, transmission line current traveling wave signals and zero-sequence voltage signals in the substation; processes the busbar and transmission line voltage traveling wave signals, transmission line current traveling wave signals and zero-sequence voltage signals to obtain hardware traveling wave data with time stamps, voltage traveling wave recording data, current traveling wave recording data and zero-sequence voltage data; the information sharing interface module obtains the event sequence record of the transmission line circuit breaker of the substation and the substation line topology information; the fault traveling wave ranging module calculates at least one fault location result based on the event sequence record, substation line topology information, zero-sequence voltage data with time stamps, voltage traveling wave recording data with time stamps, current traveling wave recording data with time stamps and hardware traveling wave data with time stamps; the information fusion ranging analysis module performs comprehensive ranging analysis on at least one fault location result of the fault traveling wave ranging module based on the actions and action lines recorded in the event sequence, and the voltage level of the action line, and selects the precise position of the real fault point from at least one fault location result. By using information fusion to perform comprehensive distance measurement analysis, the precise location of the actual fault point can be selected from the fault location results, making fault location more effective and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a structural diagram of the transmission line fault information fusion ranging system of the present invention;

[0057] Figure 2 It is a structural diagram of the signal monitoring and processing module of the present invention;

[0058] Figure 3 It is a structural diagram of the information sharing interface module of the present invention;

[0059] Figure 4 This is a structural diagram of the fault traveling wave ranging module of the present invention;

[0060] Figure 5 This is a structural diagram of the information fusion ranging analysis module of the present invention;

[0061] Figure 6 The present invention is a flow chart of the transmission line fault information fusion ranging method. DETAILED DESCRIPTION

[0062] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0063] like Figure 1 As shown, an embodiment of the present invention provides a transmission line fault information fusion ranging system, including:

[0064] Signal monitoring and processing module 101, information sharing interface module 102, fault traveling wave ranging module 103 and information fusion ranging analysis module 104;

[0065] The signal monitoring and processing module 101 is used to monitor the busbar and transmission line voltage traveling wave signals, transmission line current traveling wave signals and zero-sequence voltage signals in the substation; the transmission line voltage traveling wave signals, transmission line current traveling wave signals and zero-sequence voltage signals are processed to obtain hardware traveling wave data with time stamp, voltage traveling wave recording data, current traveling wave recording data and zero-sequence voltage data;

[0066] The information sharing interface module 102 is used to obtain the event sequence record of the transmission line circuit breaker of the substation and the substation line topology information;

[0067] The fault traveling wave location module 103 is used to calculate at least one fault location result according to the event sequence record, the substation line topology information, the zero-sequence voltage data with time stamp, the voltage traveling wave recording data with time stamp, the current traveling wave recording data with time stamp and the hardware traveling wave data with time stamp;

[0068] The information fusion ranging analysis module 104 is used to perform comprehensive ranging analysis on at least one fault location result of the fault traveling wave ranging module according to the actions and action lines recorded in the event sequence, and the voltage level of the action line, and to extract the precise position of the real fault point from at least one fault location result.

[0069] Combination Figure 1 The embodiments shown, preferably, in some embodiments of the present invention, such as Figure 2 As shown, the signal monitoring and processing module 101 includes:

[0070] A first monitoring unit 201, a second monitoring unit 202, a third monitoring unit 203, a fourth monitoring unit 204 and a signal processing unit 205;

[0071] The first monitoring unit 201 is connected in parallel with the secondary side of the bus voltage transformer and the line voltage transformer of the monitoring substation, and is used to monitor the bus and transmission line voltage traveling wave signals;

[0072] The second monitoring unit 202 uses a micro sensor to be sleeved on the secondary side wire of the line current transformer to monitor the current traveling wave signal of the transmission line;

[0073] The third monitoring unit 203 is connected in parallel with the open delta secondary side of the bus voltage transformer and is used to monitor the zero-sequence voltage signal;

[0074] The fourth monitoring unit 204 is connected to the clock system of the substation and is used to obtain the timing information of the clock system, wherein the timing information includes the time information and the second pulse signal of the Beidou Navigation Satellite System (BDS) or the Global Positioning System (GPS);

[0075] The signal processing unit 205 is used to condition and time the bus and transmission line voltage traveling wave signals, transmission line current traveling wave signals and zero-sequence voltage signals according to the timing information, and obtain the hardware traveling wave data with time stamp, voltage traveling wave recording data, current traveling wave recording data and zero-sequence voltage data. The signal processing unit 205 mainly includes a signal conditioning circuit, a hardware traveling wave extraction circuit, an analog-to-digital conversion circuit, a timing circuit and a processor circuit.

[0076] Combination Figure 1 The embodiments shown, preferably, in some embodiments of the present invention, such as Figure 3 As shown, the information sharing interface module 102 includes:

[0077] Relay protection related system data sharing interface unit 301 and business middle station data sharing interface unit 302;

[0078] The relay protection related system data sharing interface unit 301 is connected to the relay protection related system and is used to read the event sequence record of the transmission line circuit breaker from the relay protection related system. The event sequence record includes the action of the transmission line circuit breaker, the time corresponding to the action and the line;

[0079] The business middle station data sharing interface unit 302 is connected to the business middle station and is used to read the substation line topology information from the business middle station. The substation line topology information includes the substation name and substation number, the line name and line number of all lines in the substation, the circuit breaker name and circuit breaker number of the transmission line circuit breaker, the tower name and tower number of each tower on the line, and the line distance between adjacent towers.

[0080] Combination Figure 1 The embodiments shown, preferably, in some embodiments of the present invention, such as Figure 4 As shown, the fault traveling wave ranging module 103 includes:

[0081] The event sequence record analysis unit 401 is used to extract the actions of the transmission line circuit breaker and the corresponding time points and action lines according to the event sequence record; the actions include opening actions and closing actions;

[0082] The zero-sequence voltage crossing event unit 402 is used to compare the zero-sequence voltage data with the preset voltage value. When the effective value of the cycle of the data point in the zero-sequence voltage data is greater than the preset voltage value, it is regarded as the zero-sequence voltage crossing start event. The time point when the effective value of the cycle of the data point in the zero-sequence voltage data is greater than the preset voltage value for the first time is regarded as the zero-sequence voltage crossing start event time point; when the effective value of the cycle of the data point in the zero-sequence voltage data is less than the preset voltage value for the first time, it is regarded as the zero-sequence voltage crossing end event.

[0083] The hardware traveling wave effective grouping unit 403 is used to group the hardware traveling wave data according to a preset micro-time period (specifically, several microseconds as a micro-time period) to obtain multiple traveling wave groups, calculate the number of traveling waves in each traveling wave group, and the largest group is the effective first wave group of traveling waves;

[0084] The voltage traveling wave recording data traveling wave first wave identification unit 404 is used to identify the voltage traveling wave waveform in the voltage traveling wave recording data, and extract the first wave time and first wave polarity of the voltage traveling wave after removing the interference wave;

[0085] The current traveling wave recording data traveling wave first wave identification unit 405 is used to identify the current traveling wave waveform in the current traveling wave recording data, and extract the first wave time and first wave polarity of the current traveling wave after removing the interference wave;

[0086] The current traveling wave fault partitioning and ranging unit 406 is used to identify the current traveling wave recording data of the substations at both ends of the sub-action line according to the sub-action corresponding to the sub-action, and obtain the polarity of the first wave of the current traveling wave according to the current traveling wave recording data traveling wave first wave identification unit 405, and judge the fault interval; based on the fault interval, the first wave time of the current traveling wave, the line length of the sub-action line and the preset traveling wave speed are obtained according to the current traveling wave recording data traveling wave first wave identification unit 405, and the fault location result is calculated using the double-end traveling wave location method;

[0087] and,

[0088] The voltage traveling wave fault distance measuring unit 407 is used to identify the voltage traveling wave recording data of the substations at both ends of the sub-action line according to the sub-action line corresponding to the sub-action, and calculate the fault location result using the double-end traveling wave location method according to the first wave time of the voltage traveling wave of the voltage traveling wave recording data traveling wave first wave identification unit 404, the line length of the sub-action line and the preset traveling wave speed;

[0089] and,

[0090] The hardware traveling wave precise distance measuring unit 408 is used to identify the hardware traveling wave data of the substations at both ends of the sub-action line according to the sub-action line corresponding to the sub-action; based on the first wave time of the effective traveling wave first wave group of the hardware traveling wave effective grouping unit 403 within the first wave time period of the voltage traveling wave or the current traveling wave, as well as the line length of the sub-action line and the preset traveling wave speed, the fault location result is calculated using the double-end traveling wave positioning method.

[0091] The calculation formula of the double-end traveling wave positioning method in the above embodiment is:

[0092] , L Mf is the distance from substation M to fault point f; L MN is the length of the branch line between substation M and substation N; t M is the first wave time of the voltage wave or current wave of substation M; t N is the first wave time of the voltage traveling wave or current traveling wave of substation N; v is the preset traveling wave velocity.

[0093] Combination Figure 1 The embodiments shown, preferably, in some embodiments of the present invention, such as Figure 5 As shown, the information fusion ranging analysis module 104 includes:

[0094] A voltage level judgment unit 505 is used to judge whether the voltage level of the sub-action circuit corresponding to the sub-action is 110 kV or above or 35 kV;

[0095] A 110 kV and above voltage level transmission line fault distance comprehensive analysis unit 503, used for obtaining the precise location of the real fault point based on the transmission line fault distance comprehensive unit 501 when the voltage level of the transmission line is 110 kV and above;

[0096] The transmission line fault distance measurement integrated unit 501 is used to advance a first preset time period (for example, 2 seconds) according to the sub-action lines and sub-action time points corresponding to the sub-actions, and to extract the hardware traveling wave data with time stamps, the current traveling wave recording data with time stamps, and the voltage traveling wave recording data with time stamps of the substations at both ends of the sub-action lines within the first preset time period, and to obtain a first result set according to the fault location results of the hardware traveling wave precise distance measurement unit, the fault location results of the current traveling wave fault partition and distance measurement unit, and the fault location results of the voltage traveling wave fault distance measurement unit; and to select the result with the highest probability from the first result set as the precise position of the real fault point with a preset error range (for example, ±300m) as the boundary.

[0097] Combination Figure 1 The embodiments shown, preferably, in some embodiments of the present invention, such as Figure 5As shown, the information fusion ranging analysis module 104 further includes:

[0098] The specific processing ideas and processes of the 35kV transmission line fault diagnosis unit 504 are as follows S1-S10:

[0099] S1, when the voltage level of the transmission line is 35kV and below, according to the sub-action line and the sub-action time point, the sub-action time point is pushed forward to the first system set time period, and the current traveling wave recording data, voltage traveling wave recording data and hardware traveling wave data with time stamps of the substations at both ends of the sub-action line connected within the first system set time period are extracted;

[0100] S2, determine whether there is a closing action of the circuit breaker within a second system set time period (e.g., 3 minutes) after the separation action; if there is, execute step S3; if there is, execute step S6;

[0101] S3, if there is a closing action outside the second system set time period, determine the fault type of the fault location result as a single-phase grounding fault; determine whether there is a zero-sequence voltage crossing event; if there is, execute step S4; if not, execute step S5;

[0102] S4, if there is a zero-sequence voltage crossing event, the sub-action line is used as the fault calculation line, combined with the sub-action time point, the zero-sequence voltage fault distance comprehensive unit 502 is used to obtain the fault location position, all zero-sequence voltage crossing events are calculated, and all fault location positions are fitted to obtain the precise position of the real fault point;

[0103] The zero-sequence voltage fault ranging integrated unit 502 is used to use the sub-action line as the fault calculation line; take the sub-action time point as the starting point, and use the zero-sequence voltage out-of-bounds event unit to obtain the zero-sequence voltage out-of-bounds event within a third preset time period (for example, 2 hours), and obtain multiple zero-sequence voltage out-of-bounds events; use the time point of the zero-sequence voltage out-of-bounds event as the fault calculation time point, and obtain the second result set according to the fault location result of the current traveling wave fault partition and ranging unit, the fault location result of the voltage traveling wave fault ranging unit, and the fault location result of the hardware traveling wave precise ranging unit; the result with the highest probability in the second result set is used as the precise position of the real fault point.

[0104] S5, if there is no zero-sequence voltage crossing event, the sub-action line is used as the fault calculation line, and the fault location position obtained by the transmission line fault distance measurement integrated unit 501 is used as the accurate position of the real fault point in combination with the sub-action time point;

[0105] S6, if there is a closing action within the second system set time period, determine whether there is a zero-sequence voltage crossing event, if not, execute step S7; if yes, execute step S8;

[0106] S7, if there is no zero-sequence voltage crossing event, the fault type of the fault location result is determined to be a phase-to-phase short circuit fault, and the sub-action line is used as the fault calculation line, combined with the sub-action time point, and the fault location position obtained by the transmission line fault distance measurement integrated unit 501 is used as the accurate position of the real fault point;

[0107] S8, if there is a zero-sequence voltage crossing event, determine whether there is a branch action of the circuit breaker of the second line within the fourth system set time period (e.g., 5 seconds); if not, execute step S9; if yes, execute step S10;

[0108] S9, if there is no sub-action of the line circuit breaker of the second line within the fourth system set time period, the fault type of the fault location result is determined to be a phase-to-phase short circuit grounding fault, and the sub-action line is used as the fault calculation line. In combination with the sub-action time point, the fault location position F1 is obtained by using the transmission line fault ranging comprehensive unit 501, and then the fault location position F2 is obtained by using the transmission line zero-sequence voltage fault ranging comprehensive unit 502. With the system set error range δ (for example, ±300m) as the boundary, if |F1-F2|<δ, the fault location position F1 is selected as the precise position of the real fault point; if |F1-F2|≥δ, both the fault location position F1 and the fault location position F2 are used as the precise position of the real fault point;

[0109] S10, if there is a sub-action of the line circuit breaker of the second line within the fourth system set time period, the fault type of the fault location result is determined to be a non-lightning phase-to-phase short-circuit grounding fault, and the sub-action line L1 and the sub-action line L2 are used as fault calculation lines. In combination with the corresponding sub-action time points, the transmission line fault ranging comprehensive unit is used to obtain the L1 fault location position and the L2 fault location position; if the L1 fault location position is the entire length of the sub-action line L1, and the L2 fault location position is on the line of the sub-action line L2, then the L2 fault location position is used as the actual fault point precise position of the sub-action line L2; then the transmission line zero-sequence voltage fault ranging comprehensive unit is used to obtain the fault location position of the sub-action line L1, all zero-sequence voltage out-of-bounds events are calculated, and all fault location positions of the sub-action line L1 are fitted, and the interference results are removed to obtain the actual fault point precise position of the sub-action line L1.

[0110] The implementation principle in the embodiment of the present invention is:

[0111] The signal monitoring and processing module monitors the busbar and transmission line voltage traveling wave signals, transmission line current traveling wave signals and zero-sequence voltage signals in the substation; processes the busbar and transmission line voltage traveling wave signals, transmission line current traveling wave signals and zero-sequence voltage signals to obtain hardware traveling wave data with time stamps, voltage traveling wave recording data, current traveling wave recording data and zero-sequence voltage data; the information sharing interface module obtains the event sequence record of the transmission line circuit breaker of the substation and the substation line topology information; the fault traveling wave ranging module calculates at least one fault location result based on the event sequence record, substation line topology information, zero-sequence voltage data with time stamps, voltage traveling wave recording data with time stamps, current traveling wave recording data with time stamps and hardware traveling wave data with time stamps; the information fusion ranging analysis module performs comprehensive ranging analysis on at least one fault location result of the fault traveling wave ranging module based on the actions and action lines recorded in the event sequence, and the voltage level of the action line, and selects the precise position of the real fault point from at least one fault location result. After comprehensive distance analysis using information fusion, the precise location of the real fault point can be selected from the fault location results, making fault location more effective and accurate;

[0112] In order to solve the problem that 35kV transmission lines can continue to operate in the event of a fault, different treatments are required according to different fault types when accurately locating the fault. The four fault types are single-phase grounding fault, phase-to-phase short circuit fault, non-lightning phase-to-phase short circuit grounding fault and phase-to-phase short circuit grounding fault. This allows the fault location of the 35kV transmission line to be carried out according to different fault types, thereby improving the accuracy of fault location.

[0113] In combination with the power transmission line fault information fusion ranging system described in the above embodiments, the power transmission line fault information fusion ranging method is described below through an embodiment.

[0114] like Figure 6 As shown, an embodiment of the present invention provides a transmission line fault information fusion ranging method, including:

[0115] 601, the signal monitoring and processing module monitors the busbar and transmission line voltage traveling wave signals, the transmission line current traveling wave signals and the zero-sequence voltage signals in the substation; processes the busbar and transmission line voltage traveling wave signals, the transmission line current traveling wave signals and the zero-sequence voltage signals to obtain hardware traveling wave data with time stamp, voltage traveling wave recording data, current traveling wave recording data and zero-sequence voltage data;

[0116] 602, the information sharing interface module obtains the event sequence record of the transmission line circuit breaker of the substation and the substation line topology information;

[0117] 603, the fault traveling wave location module calculates at least one fault location result according to the event sequence record, the substation line topology information, the zero-sequence voltage data with time stamp, the voltage traveling wave recording data with time stamp, the current traveling wave recording data with time stamp, and the hardware traveling wave data with time stamp;

[0118] 604, the information fusion ranging analysis module performs a comprehensive ranging analysis on at least one fault location result of the fault traveling wave ranging module according to the actions and action circuits recorded in the event sequence, and the voltage level of the action circuit, and selects the precise position of the real fault point from the at least one fault location result.

[0119] The transmission line fault information fusion ranging method in this embodiment is specifically implemented with reference to the above Figure 1-Figure 5 The embodiment shown is a description of a transmission line fault information fusion ranging system.

[0120] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0121] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0122] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0123] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0124] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A transmission line fault information fusion ranging system, characterized in that: include: Signal monitoring and processing module, information sharing interface module, fault traveling wave ranging module and information fusion ranging analysis module; The signal monitoring and processing module is used to monitor the busbar and transmission line voltage traveling wave signals, transmission line current traveling wave signals and zero-sequence voltage signals in the substation; the busbar and transmission line voltage traveling wave signals, the transmission line current traveling wave signals and the zero-sequence voltage signals are processed to obtain hardware traveling wave data with time stamp, voltage traveling wave recording data, current traveling wave recording data and zero-sequence voltage data; The information sharing interface module is used to obtain the event sequence record of the transmission line circuit breaker of the substation and the substation line topology information; The fault traveling wave ranging module is used to calculate at least one fault location result according to the event sequence record, the substation line topology information, the zero-sequence voltage data with time stamp, the voltage traveling wave recording data with time stamp, the current traveling wave recording data with time stamp and the hardware traveling wave data with time stamp; The information fusion ranging analysis module is used to perform comprehensive ranging analysis on at least one fault location result of the fault traveling wave ranging module according to the actions and action circuits recorded in the event sequence, and the voltage level of the action circuit, and extract the precise position of the real fault point from the at least one fault location result; The signal monitoring and processing module comprises: A first monitoring unit, a second monitoring unit, a third monitoring unit, a fourth monitoring unit and a signal processing unit; The first monitoring unit is connected in parallel with the secondary sides of the bus voltage transformer and the line voltage transformer of the monitoring substation, and is used to monitor the bus and transmission line voltage traveling wave signals; The second monitoring unit uses a micro sensor sleeved on the secondary side wire of the line current transformer to monitor the current traveling wave signal of the transmission line; The third monitoring unit is connected in parallel with the open delta secondary side of the bus voltage transformer and is used to monitor the zero-sequence voltage signal; The fourth monitoring unit is connected to the clock system of the substation, and is used to obtain the timing information of the clock system, wherein the timing information includes the time information and the pulse-per-second signal of the Beidou satellite navigation system BDS or the global positioning system GPS; The signal processing unit is used to condition and time the bus and transmission line voltage traveling wave signals, the transmission line current traveling wave signals and the zero-sequence voltage signals according to the timing information, and obtain hardware traveling wave data with time stamp, voltage traveling wave recording data, current traveling wave recording data and zero-sequence voltage data; The information sharing interface module includes: Relay protection related system data sharing interface unit and business middle platform data sharing interface unit; The relay protection related system data sharing interface unit is connected to the relay protection related system and is used to read the event sequence record of the transmission line circuit breaker from the relay protection related system, wherein the event sequence record includes the action of the transmission line circuit breaker, the time corresponding to the action and the line; The business middle station data sharing interface unit is connected to the business middle station and is used to read the substation line topology information from the business middle station, wherein the substation line topology information includes the substation name and substation number, the line names and line numbers of all lines in the substation, the circuit breaker name and circuit breaker number of the transmission line circuit breaker, the tower name and tower number of each tower on the line, and the line distance between adjacent towers; The fault traveling wave ranging module comprises: An event sequence record analysis unit, used to extract the action of the transmission line circuit breaker and the corresponding time point and action circuit according to the event sequence record; the action includes an opening action and a closing action; A zero-sequence voltage crossing event unit is used to compare the zero-sequence voltage data with a preset voltage value. When the effective value of the cycle of a data point in the zero-sequence voltage data is greater than the preset voltage value, it is used as a zero-sequence voltage crossing start event. The time point when the effective value of the cycle of a data point in the zero-sequence voltage data is greater than the preset voltage value for the first time is used as a zero-sequence voltage crossing start event time point; when the effective value of the cycle of a data point in the zero-sequence voltage data is less than the preset voltage value for the first time, it is used as a zero-sequence voltage crossing end event. The hardware traveling wave effective grouping unit is used to group the hardware traveling wave data according to a preset time period to obtain a plurality of traveling wave groups, calculate the number of traveling waves in each traveling wave group, and the maximum group is the effective traveling wave first wave group; A voltage traveling wave recording data traveling wave first wave identification unit is used to identify the voltage traveling wave waveform in the voltage traveling wave recording data, and extract the first wave time and first wave polarity of the voltage traveling wave after removing the interference wave; A current traveling wave recording data traveling wave first wave identification unit is used to identify the current traveling wave waveform in the current traveling wave recording data, and extract the first wave time and first wave polarity of the current traveling wave after removing the interference wave; The current traveling wave fault partitioning and ranging unit is used to identify the current traveling wave recording data of the substations at both ends of the sub-action line according to the sub-action corresponding to the sub-action, obtain the polarity of the first wave of the current traveling wave according to the traveling wave first wave identification unit of the current traveling wave recording data, and judge the fault interval; based on the fault interval, obtain the first wave time of the current traveling wave according to the traveling wave first wave identification unit of the current traveling wave recording data, the line length of the sub-action line and the preset traveling wave speed, and use the double-end traveling wave positioning method to calculate the fault positioning result; and, A voltage traveling wave fault distance measuring unit is used to identify the voltage traveling wave recording data of the substations at both ends of the sub-action line according to the sub-action line corresponding to the sub-action, and to calculate the fault location result using the double-end traveling wave location method according to the first wave time of the voltage traveling wave of the voltage traveling wave recording data traveling wave first wave identification unit, the line length of the sub-action line and the preset traveling wave speed; and, The hardware traveling wave precise distance measuring unit is used to identify the hardware traveling wave data of the substations at both ends of the sub-action line according to the sub-action line corresponding to the sub-action; and to calculate the fault location result using the double-end traveling wave location method according to the first wave time of the effective traveling wave first wave group of the hardware traveling wave effective grouping unit in the first wave time period of the voltage traveling wave or the current traveling wave, as well as the line length of the sub-action line and the preset traveling wave speed; The information fusion ranging analysis module includes: A voltage level judgment unit, used to judge whether the voltage level of the sub-action circuit corresponding to the sub-action is 110 kV or above or 35 kV; A 110kV and above voltage level transmission line fault distance comprehensive analysis unit, used to obtain the precise location of the real fault point based on the transmission line fault distance comprehensive unit when the voltage level is 110kV and above; The transmission line fault distance measurement integrated unit is used to advance a first preset time period forward according to the sub-action time point according to the sub-action line and sub-action time point corresponding to the sub-action, set the first preset time period to extract the hardware traveling wave data with time stamp, the current traveling wave recording data with time stamp and the voltage traveling wave recording data with time stamp of the substations at both ends of the sub-action line, and obtain a first result set according to the fault location result of the hardware traveling wave precise distance measurement unit, the fault location result of the current traveling wave fault partition and distance measurement unit and the fault location result of the voltage traveling wave fault distance measurement unit; the result with the highest probability in the first result set is used as the precise position of the real fault point; The information fusion ranging analysis module also includes: A 35kV transmission line fault diagnosis unit is used to extract the time-stamped current traveling wave recording data, time-stamped voltage traveling wave recording data and time-stamped hardware traveling wave data of the substations at both ends of the sub-action line connected within the first system set time period according to the sub-action line and the sub-action time point when the voltage level is 35kV; The 35kV transmission line fault diagnosis unit is also used to determine whether there is a corresponding closing action within the second system set time period after the branch action; if there is a closing action outside the second system set time period, the fault type of the fault location result is determined to be a single-phase grounding fault; determine whether there is a zero-sequence voltage crossing event, if there is a zero-sequence voltage crossing event, use the branch action line as the fault calculation line, combine the branch action time point, use the zero-sequence voltage fault ranging comprehensive unit to obtain the fault location position, calculate all zero-sequence voltage crossing events, and fit all fault location positions to obtain the precise position of the real fault point; if there is no zero-sequence voltage crossing event, use the branch action line as the fault calculation line, combine the branch action time point, and use the fault location position obtained by the transmission line fault ranging comprehensive unit as the precise position of the real fault point; The zero-sequence voltage fault ranging integrated unit is used to use the sub-action line as the fault calculation line; take the sub-action time point as the starting point, and use the zero-sequence voltage crossing event unit to obtain the zero-sequence voltage crossing event within a third preset time period, and obtain multiple zero-sequence voltage crossing events; use the time point of the zero-sequence voltage crossing event as the fault calculation time point, and obtain a second result set according to the fault location result of the current traveling wave fault partition and ranging unit, the fault location result of the voltage traveling wave fault ranging unit, and the fault location result of the hardware traveling wave precise ranging unit; the result with the highest probability in the second result set is used as the precise position of the real fault point; The information fusion ranging analysis module also includes: The 35kV transmission line fault diagnosis unit is further used to determine whether there is a zero-sequence voltage out-of-bounds event if there is a closing action within the second system set time period, and if there is no zero-sequence voltage out-of-bounds event, determine that the fault type of the fault location result is a phase-to-phase short circuit fault, use the branch action line as the fault calculation line, combine the branch action time point, and use the fault location position obtained by the transmission line fault ranging integrated unit as the precise position of the real fault point; if there is a zero-sequence voltage out-of-bounds event, determine whether there is a branch action of the transmission line circuit breaker of the second line within the fourth system set time period; The 35kV transmission line fault diagnosis unit is further used for determining that the fault type of the fault location result is a phase-to-phase short circuit grounding fault if there is no sub-action of the transmission line circuit breaker of the second line within the fourth system set time period, using the sub-action line as the fault calculation line, combining the sub-action time point, using the transmission line fault ranging comprehensive unit to obtain the fault location position F1, and then using the zero-sequence voltage fault ranging comprehensive unit to obtain the fault location position F2, using the system set error distance δ as the boundary, if |F1-F2|<δ, then selecting the fault location position F1 as the precise position of the real fault point; if |F1-F2|≥δ, then both the fault location position F1 and the fault location position F2 are used as the precise position of the real fault point; The 35kV transmission line fault diagnosis unit is further used for determining that the fault type of the fault location result is a non-lightning phase-to-phase short-circuit grounding fault if there is a sub-action of the transmission line circuit breaker on the second line within the fourth system set time period, taking the sub-action line L1 and the sub-action line L2 as fault calculation lines, and combining the corresponding sub-action time points, using the transmission line fault ranging comprehensive unit to obtain the L1 fault location position and the L2 fault location position; if the L1 fault location position is the entire length of the sub-action line L1, and the L2 fault location position is on the line of the sub-action line L2, then the L2 fault location position is used as the actual fault point precise position of the sub-action line L2; and then using the zero-sequence voltage fault ranging comprehensive unit to obtain the fault location position of the sub-action line L1, calculate all zero-sequence voltage out-of-bounds events, and fit all the fault location positions of the sub-action lines L1 to obtain the actual fault point precise position of the sub-action line L1.

2. The transmission line fault information fusion ranging system according to claim 1, characterized in that: The calculation formula of the double-terminal traveling wave positioning method is: The L Mf is the distance from substation M to fault point f; MN is the line length of the sub-action line between the substation M and the substation N; the t M is the first wave time of the voltage wave or current wave of the substation M; the t N is the first wave time of the voltage traveling wave or current traveling wave of the substation N; and v is the preset traveling wave velocity.

3. A transmission line fault information fusion ranging method, characterized in that: Applied to the transmission line fault information fusion ranging system according to claim 1, the method comprises: The signal monitoring and processing module monitors the busbar and transmission line voltage traveling wave signals, the transmission line current traveling wave signals and the zero-sequence voltage signals in the substation; processes the busbar and transmission line voltage traveling wave signals, the transmission line current traveling wave signals and the zero-sequence voltage signals to obtain hardware traveling wave data with time stamps, voltage traveling wave recording data, current traveling wave recording data and zero-sequence voltage data; The information sharing interface module obtains the event sequence record of the transmission line circuit breaker of the substation and the substation line topology information; The fault traveling wave ranging module calculates at least one fault location result according to the event sequence record, the substation line topology information, the zero-sequence voltage data with time stamp, the voltage traveling wave recording data with time stamp, the current traveling wave recording data with time stamp and the hardware traveling wave data with time stamp; The information fusion ranging analysis module performs a comprehensive ranging analysis on at least one fault location result of the fault traveling wave ranging module according to the actions and action circuits recorded in the event sequence, and the voltage level of the action circuit, and extracts the precise position of the real fault point from the at least one fault location result; The signal monitoring and processing module comprises: A first monitoring unit, a second monitoring unit, a third monitoring unit, a fourth monitoring unit and a signal processing unit; The first monitoring unit is connected in parallel with the secondary sides of the bus voltage transformer and the line voltage transformer of the monitoring substation, and is used to monitor the bus and transmission line voltage traveling wave signals; The second monitoring unit uses a micro sensor sleeved on the secondary side wire of the line current transformer to monitor the current traveling wave signal of the transmission line; The third monitoring unit is connected in parallel with the open delta secondary side of the bus voltage transformer and is used to monitor the zero-sequence voltage signal; The fourth monitoring unit is connected to the clock system of the substation, and is used to obtain the timing information of the clock system, wherein the timing information includes the time information and the pulse-per-second signal of the Beidou satellite navigation system BDS or the global positioning system GPS; The signal processing unit is used to condition and time the bus and transmission line voltage traveling wave signals, the transmission line current traveling wave signals and the zero-sequence voltage signals according to the timing information, and obtain hardware traveling wave data with time stamp, voltage traveling wave recording data, current traveling wave recording data and zero-sequence voltage data; The information sharing interface module includes: Relay protection related system data sharing interface unit and business middle platform data sharing interface unit; The relay protection related system data sharing interface unit is connected to the relay protection related system and is used to read the event sequence record of the transmission line circuit breaker from the relay protection related system, wherein the event sequence record includes the action of the transmission line circuit breaker, the time corresponding to the action and the line; The business middle station data sharing interface unit is connected to the business middle station and is used to read the substation line topology information from the business middle station, wherein the substation line topology information includes the substation name and substation number, the line names and line numbers of all lines in the substation, the circuit breaker name and circuit breaker number of the transmission line circuit breaker, the tower name and tower number of each tower on the line, and the line distance between adjacent towers; The fault traveling wave ranging module comprises: An event sequence record analysis unit, used to extract the action of the transmission line circuit breaker and the corresponding time point and action circuit according to the event sequence record; the action includes an opening action and a closing action; A zero-sequence voltage crossing event unit is used to compare the zero-sequence voltage data with a preset voltage value. When the effective value of the cycle of a data point in the zero-sequence voltage data is greater than the preset voltage value, it is used as a zero-sequence voltage crossing start event. The time point when the effective value of the cycle of a data point in the zero-sequence voltage data is greater than the preset voltage value for the first time is used as a zero-sequence voltage crossing start event time point; when the effective value of the cycle of a data point in the zero-sequence voltage data is less than the preset voltage value for the first time, it is used as a zero-sequence voltage crossing end event. The hardware traveling wave effective grouping unit is used to group the hardware traveling wave data according to a preset time period to obtain a plurality of traveling wave groups, calculate the number of traveling waves in each traveling wave group, and the maximum group is the effective traveling wave first wave group; A voltage traveling wave recording data traveling wave first wave identification unit is used to identify the voltage traveling wave waveform in the voltage traveling wave recording data, and extract the first wave time and first wave polarity of the voltage traveling wave after removing the interference wave; A current traveling wave recording data traveling wave first wave identification unit is used to identify the current traveling wave waveform in the current traveling wave recording data, and extract the first wave time and first wave polarity of the current traveling wave after removing the interference wave; The current traveling wave fault partitioning and ranging unit is used to identify the current traveling wave recording data of the substations at both ends of the sub-action line according to the sub-action corresponding to the sub-action, obtain the polarity of the first wave of the current traveling wave according to the traveling wave first wave identification unit of the current traveling wave recording data, and judge the fault interval; based on the fault interval, obtain the first wave time of the current traveling wave according to the traveling wave first wave identification unit of the current traveling wave recording data, the line length of the sub-action line and the preset traveling wave speed, and use the double-end traveling wave positioning method to calculate the fault positioning result; and, A voltage traveling wave fault distance measuring unit is used to identify the voltage traveling wave recording data of the substations at both ends of the sub-action line according to the sub-action line corresponding to the sub-action, and to calculate the fault location result using the double-end traveling wave location method according to the first wave time of the voltage traveling wave of the voltage traveling wave recording data traveling wave first wave identification unit, the line length of the sub-action line and the preset traveling wave speed; and, The hardware traveling wave precise distance measuring unit is used to identify the hardware traveling wave data of the substations at both ends of the sub-action line according to the sub-action line corresponding to the sub-action; and to calculate the fault location result using the double-end traveling wave location method according to the first wave time of the effective traveling wave first wave group of the hardware traveling wave effective grouping unit in the first wave time period of the voltage traveling wave or the current traveling wave, as well as the line length of the sub-action line and the preset traveling wave speed; The information fusion ranging analysis module includes: A voltage level judgment unit, used to judge whether the voltage level of the sub-action circuit corresponding to the sub-action is 110 kV or above or 35 kV; A 110kV and above voltage level transmission line fault distance comprehensive analysis unit, used to obtain the precise location of the real fault point based on the transmission line fault distance comprehensive unit when the voltage level is 110kV and above; The transmission line fault distance measurement integrated unit is used to advance a first preset time period forward according to the sub-action time point according to the sub-action line and sub-action time point corresponding to the sub-action, set the first preset time period to extract the hardware traveling wave data with time stamp, the current traveling wave recording data with time stamp and the voltage traveling wave recording data with time stamp of the substations at both ends of the sub-action line, and obtain a first result set according to the fault location result of the hardware traveling wave precise distance measurement unit, the fault location result of the current traveling wave fault partition and distance measurement unit and the fault location result of the voltage traveling wave fault distance measurement unit; the result with the highest probability in the first result set is used as the precise position of the real fault point; The information fusion ranging analysis module also includes: A 35kV transmission line fault diagnosis unit is used to extract the time-stamped current traveling wave recording data, time-stamped voltage traveling wave recording data and time-stamped hardware traveling wave data of the substations at both ends of the sub-action line connected within the first system set time period according to the sub-action line and the sub-action time point when the voltage level is 35kV; The 35kV transmission line fault diagnosis unit is also used to determine whether there is a corresponding closing action within the second system set time period after the branch action; if there is a closing action outside the second system set time period, the fault type of the fault location result is determined to be a single-phase grounding fault; determine whether there is a zero-sequence voltage crossing event, if there is a zero-sequence voltage crossing event, use the branch action line as the fault calculation line, combine the branch action time point, use the zero-sequence voltage fault ranging comprehensive unit to obtain the fault location position, calculate all zero-sequence voltage crossing events, and fit all fault location positions to obtain the precise position of the real fault point; if there is no zero-sequence voltage crossing event, use the branch action line as the fault calculation line, combine the branch action time point, and use the fault location position obtained by the transmission line fault ranging comprehensive unit as the precise position of the real fault point; The zero-sequence voltage fault ranging integrated unit is used to use the sub-action line as the fault calculation line; take the sub-action time point as the starting point, and use the zero-sequence voltage crossing event unit to obtain the zero-sequence voltage crossing event within a third preset time period, and obtain multiple zero-sequence voltage crossing events; use the time point of the zero-sequence voltage crossing event as the fault calculation time point, and obtain a second result set according to the fault location result of the current traveling wave fault partition and ranging unit, the fault location result of the voltage traveling wave fault ranging unit, and the fault location result of the hardware traveling wave precise ranging unit; the result with the highest probability in the second result set is used as the precise position of the real fault point; The information fusion ranging analysis module also includes: The 35kV transmission line fault diagnosis unit is further used to determine whether there is a zero-sequence voltage out-of-bounds event if there is a closing action within the second system set time period, and if there is no zero-sequence voltage out-of-bounds event, determine that the fault type of the fault location result is a phase-to-phase short circuit fault, use the branch action line as the fault calculation line, combine the branch action time point, and use the fault location position obtained by the transmission line fault ranging integrated unit as the precise position of the real fault point; if there is a zero-sequence voltage out-of-bounds event, determine whether there is a branch action of the transmission line circuit breaker of the second line within the fourth system set time period; The 35kV transmission line fault diagnosis unit is further used for determining that the fault type of the fault location result is a phase-to-phase short circuit grounding fault if there is no sub-action of the transmission line circuit breaker of the second line within the fourth system set time period, using the sub-action line as the fault calculation line, combining the sub-action time point, using the transmission line fault ranging comprehensive unit to obtain the fault location position F1, and then using the zero-sequence voltage fault ranging comprehensive unit to obtain the fault location position F2, using the system set error distance δ as the boundary, if |F1-F2|<δ, then selecting the fault location position F1 as the precise position of the real fault point; if |F1-F2|≥δ, then both the fault location position F1 and the fault location position F2 are used as the precise position of the real fault point; The 35kV transmission line fault diagnosis unit is further used for determining that the fault type of the fault location result is a non-lightning phase-to-phase short-circuit grounding fault if there is a sub-action of the transmission line circuit breaker on the second line within the fourth system set time period, taking the sub-action line L1 and the sub-action line L2 as fault calculation lines, and combining the corresponding sub-action time points, using the transmission line fault ranging comprehensive unit to obtain the L1 fault location position and the L2 fault location position; if the L1 fault location position is the entire length of the sub-action line L1, and the L2 fault location position is on the line of the sub-action line L2, then the L2 fault location position is used as the actual fault point precise position of the sub-action line L2; and then using the zero-sequence voltage fault ranging comprehensive unit to obtain the fault location position of the sub-action line L1, calculate all zero-sequence voltage out-of-bounds events, and fit all the fault location positions of the sub-action lines L1 to obtain the actual fault point precise position of the sub-action line L1.

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