Fault location determination method, apparatus, and computer readable storage medium

Abstract

The application relates to the technical field of electric power, and provides a fault position determination method, a device and a computer readable storage medium, the method comprising the following steps: in the case that a fault position determination device detects a traveling wave pulse on a power transmission line, the pulse frequency, the pulse rising edge time length and the polarity of each traveling wave pulse in multiple traveling wave pulses in a target time period are acquired; at least one reflected traveling wave pulse of a target traveling wave pulse in the multiple traveling wave pulses is determined according to the pulse frequency, the pulse rising edge time length and the polarity of each traveling wave pulse in the multiple traveling wave pulses; and a target distance is determined according to a first time and a second time; the target distance is the distance between the fault position on the power transmission line and the fault position determination device. The accuracy of determining the fault position can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric power, and in particular to a fault location determination method and device and a computer readable storage medium. BACKGROUND

[0002] After a fault occurs in a power transmission line, the fault location needs to be determined so as to repair the location where the fault occurs.

[0003] When a fault occurs in a power transmission line, a momentary and huge voltage or current mutation occurs at the fault location, and this mutation propagates in the form of a wave at a speed close to the speed of light to both ends of the power transmission line. This wave is called a traveling wave. In the existing scheme, a traveling wave detection device is installed at a single end of the power transmission line to determine the fault location based on the traveling wave. However, due to the existence of impedance discontinuous nodes such as towers, branch lines, and opposite end substations in the middle of the power transmission line, the traveling wave is complex, thereby reducing the accuracy of determining the fault location. SUMMARY

[0004] The present application provides a fault location determination method and device and a computer readable storage medium, which can improve the accuracy of determining the fault location.

[0005] To achieve the above object, the present application adopts the following technical scheme:

[0006] In a first aspect, a fault location determination method is provided. The fault location determination method is applied to a fault location determination device. The method comprises: in a case where the fault location determination device detects a traveling wave pulse on a power transmission line, acquiring a pulse frequency, a pulse rising edge time length, and a polarity of each traveling wave pulse in a plurality of traveling wave pulses in a target time period; a start time of the target time period is a time when the fault location determination device detects the traveling wave pulse on the power transmission line, and a time length of the target time period is a preset time length. The traveling wave pulse is a half-cycle pulse; determining at least one reflected traveling wave pulse of a target traveling wave pulse in the plurality of traveling wave pulses according to the pulse frequency, the pulse rising edge time length, and the polarity of each traveling wave pulse in the plurality of traveling wave pulses; the target traveling wave pulse is a traveling wave pulse in the plurality of traveling wave pulses whose wave head reaches the fault location determination device earliest; determining a target distance according to a first time and a second time; the target distance is a distance between the fault location and the fault location determination device on the power transmission line; the first time is a time when a wave head of the target traveling wave pulse reaches the fault location determination device, and the second time is a time when a wave head of the reflected traveling wave pulse reaches the fault location determination device. The number of the second time is one or more.

[0007] Based on the scheme, after the fault position determination apparatus detects the traveling wave pulse on the power transmission line, it is indicated that a fault occurs on the power transmission line, and by obtaining the pulse frequency, pulse rising edge length and polarity of each traveling wave pulse in the target time period, since the target traveling wave pulse is the traveling wave pulse whose wave head arrives at the fault position determination apparatus earliest among the multiple traveling wave pulses, it is indicated that the target traveling wave pulse is the traveling wave directly generated by the fault, and according to the pulse frequency, pulse rising edge length and polarity of each traveling wave pulse, the reflected traveling wave pulse of the target traveling wave pulse can be determined, so that the reflected traveling wave pulse of the target traveling wave pulse can be determined from the multiple traveling wave pulses, and after the reflected traveling wave pulse of the target traveling wave pulse is determined, the distance between the fault position on the power transmission line and the fault position determination apparatus can be determined according to the first moment when the wave head of the target traveling wave pulse arrives at the fault position determination apparatus and the second moment when the wave head of the reflected traveling wave pulse arrives at the fault position determination apparatus, thereby improving the accuracy of determining the fault position.

[0008] In combination with the first aspect, in some embodiments of the first aspect, the reflected traveling wave pulse of the target traveling wave pulse is determined according to the pulse frequency, pulse rising edge length and polarity of each traveling wave pulse in the multiple traveling wave pulses, including: taking the traveling wave pulse with the same pulse frequency as the target traveling wave pulse as a first traveling wave pulse in the multiple traveling wave pulses, to obtain at least one first traveling wave pulse; taking the traveling wave pulse with the same polarity as the target traveling wave pulse as a second traveling wave pulse in the at least one first traveling wave pulse, to obtain at least one second traveling wave pulse; and determining the reflected traveling wave pulse of the target traveling wave pulse in the at least one second traveling wave pulse according to the pulse rising edge length of the at least one second traveling wave pulse and the pulse rising edge length of the target traveling wave pulse.

[0009] Based on the scheme, since the target traveling wave pulse and its reflected traveling wave pulse have the same source, both are generated by the same fault, and the pulse frequency, pulse rising edge length and polarity of the target traveling wave pulse and its reflected traveling wave pulse have similarity, therefore, by screening the pulse frequency, pulse rising edge length and polarity of the multiple traveling wave pulses, the reflected traveling wave pulse of the target traveling wave pulse can be determined.

[0010] With reference to the first aspect, in some embodiments of the first aspect, the determining the reflected traveling wave pulse of the target traveling wave pulse from the at least one second traveling wave pulse according to a pulse rising edge duration of the at least one second traveling wave pulse and a pulse rising edge duration of the target traveling wave pulse comprises: taking a difference between the pulse rising edge duration of the target traveling wave pulse and a target product as one end of a target duration interval, taking a sum of the pulse rising edge duration of the target traveling wave pulse and the target product as the other end of the target duration interval, to obtain the target duration interval; the target product is a product of the pulse rising edge duration of the target traveling wave pulse and a preset coefficient, and the preset coefficient is less than 1; and taking a second traveling wave pulse with a pulse rising edge duration in the target duration interval from the at least one second traveling wave pulse as the reflected traveling wave pulse of the target traveling wave pulse.

[0011] Based on the scheme, in an ideal case, the pulse rising edge duration of the target traveling wave pulse is the same as that of the reflected traveling wave pulse of the target traveling wave pulse, however, in an actual case, the pulse rising edge duration of the reflected traveling wave pulse of the target traveling wave pulse is slightly different from that of the target traveling wave pulse due to the influence of a complex environment in the power transmission line, since the middle point of the target duration interval is the pulse rising edge duration of the target traveling wave pulse, by taking the second traveling wave pulse with the pulse rising edge duration in the target duration interval as the reflected traveling wave pulse of the target traveling wave pulse, the requirement for the pulse rising edge duration of the reflected traveling wave pulse can be appropriately relaxed, thereby improving the flexibility of determining the reflected traveling wave pulse.

[0012] With reference to the first aspect, in some embodiments of the first aspect, the obtaining the pulse rising edge duration of each traveling wave pulse in the plurality of traveling wave pulses in the target time period comprises: for each traveling wave pulse in the plurality of traveling wave pulses, obtaining a time corresponding to a first amplitude and a time corresponding to a second amplitude in a pulse rising edge of the traveling wave pulse; the ratio of the first amplitude to the maximum value of the amplitude of the traveling wave pulse is 1 / 10, and the ratio of the second amplitude to the maximum value of the amplitude of the traveling wave pulse is 9 / 10; and taking the difference between the time corresponding to the second amplitude and the time corresponding to the first amplitude as the pulse rising edge duration of the traveling wave pulse.

[0013] Based on the scheme, since the starting stage and the ending stage of the pulse rising edge of the traveling wave pulse are greatly influenced by the outside world and are unstable, by taking the difference between the time corresponding to the second amplitude and the time corresponding to the first amplitude as the pulse rising edge duration of the traveling wave pulse, the accuracy of determining the pulse rising edge duration of the traveling wave pulse can be improved.

[0014] With reference to the first aspect, in some embodiments of the first aspect, in the case where the number of the second time points is 1, the determining the target distance according to the first time point and the second time point comprises: determining the target distance according to the first relationship:

[0015]

[0016] wherein x represents the target distance, represents the second time, represents the first time, V represents the wave speed of the traveling wave pulse, and n represents the order of the reflected traveling wave pulse corresponding to the second time in the target sequence, the target sequence being an ordering of the times at which the wave fronts of the at least one reflected traveling wave pulse arrive at the fault location determination apparatus from early to late.

[0017] With reference to the first aspect, in some embodiments of the first aspect, the order of the reflected traveling wave pulse corresponding to the second time in the target sequence is 1.

[0018] Based on this scheme, the later the reflected traveling wave pulse arrives at the fault location determination apparatus, the more interference the reflected traveling wave pulse receives, the earlier the reflected traveling wave pulse arrives at the fault location determination apparatus, the less interference the reflected traveling wave pulse receives, and the target distance is determined based on the reflected traveling wave pulse that arrives at the fault location determination apparatus earlier, which can improve the accuracy of determining the fault location.

[0019] With reference to the first aspect, in some embodiments of the first aspect, in a case where the number of the second times is a plurality, the target distance is determined according to the first time and the second time, including: for each of the plurality of second times, determining an initial distance according to the first relationship:

[0020]

[0021] wherein x represents the target distance, represents the second time, represents the first time, V represents the wave speed of the traveling wave pulse, and n represents the order of the reflected traveling wave pulse corresponding to the second time in the target sequence, the target sequence being an ordering of the times at which the wave fronts of the at least one reflected traveling wave pulse arrive at the fault location determination apparatus from early to late.

[0022] Based on this scheme, in some cases, there can be errors in the second time, and in this case, determining the target distance based on a single second time will result in errors in the determined target distance. By determining an initial distance according to one second time in a case where the number of the second times is a plurality, and then taking the average of the plurality of initial distances as the target distance, the accuracy of the determined target distance can be improved.

[0023] In a second aspect, a fault location determination apparatus is provided for implementing the fault location determination method of the first aspect. The fault location determination apparatus comprises modules, units or means for implementing the corresponding steps of the method, which can be implemented by hardware, software or by hardware executing corresponding software. The hardware or software comprises one or more modules or units corresponding to the above functions.

[0024] With reference to the second aspect, in some embodiments of the second aspect, the apparatus comprises an acquisition module and a processing module; the acquisition module is configured to, in a case where the fault location determination apparatus detects a traveling wave pulse on the power transmission line, acquire a pulse frequency, a pulse rising edge duration and a polarity of each of a plurality of traveling wave pulses in a target time period; a start time of the target time period is a time when the fault location determination apparatus detects the traveling wave pulse on the power transmission line, and a duration of the target time period is a preset duration; the traveling wave pulse is a half-cycle pulse; and the processing module is configured to determine at least one reflected traveling wave pulse of a target traveling wave pulse from each of the plurality of traveling wave pulses according to the pulse frequency, the pulse rising edge duration and the polarity of each of the plurality of traveling wave pulses; the target traveling wave pulse is a traveling wave pulse with a wave head that reaches the fault location determination apparatus earliest among the plurality of traveling wave pulses; and the processing module is further configured to determine a target distance according to a first time and a second time; the target distance is a distance between the fault location and the fault location determination apparatus on the power transmission line; the first time is a time when a wave head of the target traveling wave pulse reaches the fault location determination apparatus, and the second time is a time when a wave head of the reflected traveling wave pulse reaches the fault location determination apparatus, and the number of the second times is one or more.

[0025] In a third aspect, a fault location determination apparatus is provided, comprising at least one processor and a memory for storing processor-executable instructions; wherein the processor is configured to execute the instructions to implement the method provided in the first aspect and any possible implementation thereof.

[0026] In a fourth aspect, a computer-readable storage medium is provided, which, when the instructions in the computer-readable storage medium are executed by a processor of a fault location determination apparatus, enables the fault location determination apparatus to perform the method provided in the first aspect and any possible implementation thereof.

[0027] In a fifth aspect, a computer program product containing instructions, which, when run on a computer, enables the computer to perform the method provided in the first aspect and any possible implementation thereof.

[0028] The technical effects brought by any of the embodiments of the second aspect to the fifth aspect can refer to the technical effects brought by the different embodiments of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 An architecture schematic of a fault location determination system provided in the present application;

[0030] Figure 2 A flow schematic of a fault location determination method provided in the present application;

[0031] Figure 3 A flow schematic of another fault location determination method provided in the present application;

[0032] Figure 4 A flow schematic of another fault location determination method provided in the present application;

[0033] Figure 5 A structure schematic of a fault location determination apparatus provided in the present application;

[0034] Figure 6 A structure schematic of another fault location determination apparatus provided in the present application. DETAILED DESCRIPTION

[0035] In the description of the present application, “a plurality of” means two or more than two, unless otherwise specified. “At least one of the following” or similar expressions means any combination of the items, including any combination of single item or multiple items. For example, at least one of a, b, or c can mean a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0036] In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the same items or similar items with basically the same functions and effects are distinguished by using “first”, “second”, etc. The skilled in the art can understand that “first”, “second”, etc. do not limit the quantity and execution order, and “first”, “second”, etc. also do not necessarily mean different.

[0037] Meanwhile, in the embodiments of the present application, the words “exemplary” or “for example” are used to mean serving as an example, instance, or illustration. Any embodiment or design solution described in the embodiments of the present application as “exemplary” or “for example” should not be interpreted as being more preferred or advantageous than other embodiments or design solutions. Rather, the use of the words “exemplary” or “for example” is intended to present concepts in a specific way, facilitating understanding.

[0038] It can be understood that the "embodiments" mentioned throughout the specification mean that the specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the present application. Therefore, the various embodiments throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It can be understood that in various embodiments of the present application, the size of the sequence number of each process does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0039] It can be understood that in the present application, "when", "if" and "if" all refer to the corresponding processing under certain objective circumstances, not limited by time, and do not require a judgment action when implemented, nor does it mean that there are other limitations.

[0040] It can be understood that some optional features in the embodiments of the present application can be implemented independently in some scenarios without relying on other features, such as the current scheme based on, to solve the corresponding technical problems and achieve the corresponding effects. In some scenarios, it can be combined with other features according to demand. Correspondingly, the devices given in the embodiments of the present application can also realize these features or functions, which will not be described here.

[0041] In the present application, except for special description, the same or similar parts of each embodiment can be mutually referred to. In the various embodiments of the present application, and the various implementation methods in each embodiment, if there is no special description and no logical conflict, the terms and / or descriptions between different embodiments, and between the various implementation methods in each embodiment are consistent and can be mutually referred to. The technical features in different embodiments, and the various implementation methods in each embodiment can be combined to form new embodiments, implementation manners, implementation methods, or implementation methods according to their inherent logical relationship. The following implementation manners of the present application do not constitute a limitation on the protection scope of the present application.

[0042] After the fault of the power transmission line occurs, the fault position needs to be determined so as to repair the position where the fault occurs.

[0043] When the power transmission line fails, a momentary and huge voltage or current mutation will occur at the fault position. This mutation will propagate in the form of a wave at a speed close to the speed of light to both ends of the power transmission line. This wave is called a traveling wave. In the existing scheme, in order to determine the fault position, a traveling wave detection device is installed at one end of the power transmission line, and the fault position is determined based on the traveling wave. Due to the existence of impedance discontinuous nodes such as towers, branch lines and opposite end substations in the middle of the power transmission line, the traveling wave is complex, thereby making the accuracy of determining the fault position poor.

[0044] To solve the above problems, the application provides a fault position determination method, Figure 1 For the architecture schematic diagram of the fault position determination system provided by the application, the technical scheme of the embodiment of the application can be applied to Figure 1 The fault position determination system is shown in the figure, as Figure 1 The fault position determination system 10 includes a fault position determination device 11 and a power transmission line 12.

[0045] The fault position determination device 11 is arranged at one end of the power transmission line 12. After a fault occurs in the power transmission line 12, a traveling wave is generated. When the traveling wave reaches the fault position determination device 11, the fault position determination device 11 can detect the traveling wave in the power transmission line 12. Subsequently, the fault position determination method provided by the application can be executed to determine the fault position.

[0046] In the following, the fault position determination method is applied to the fault position determination device as an example, and the fault position determination method provided by the embodiment of the application is described.

[0047] Figure 2 For the flowchart of the fault position determination method provided by the application, as Figure 2 The method includes the following steps:

[0048] S201, the fault position determination device acquires the pulse frequency, pulse rising edge time and polarity of each traveling wave pulse in a plurality of traveling wave pulses in a target time period, in the case that the fault position determination device detects a traveling wave pulse on the power transmission line.

[0049] The starting time of the target time period is the time when the fault position determination device detects the traveling wave pulse on the power transmission line, and the duration of the target time period is a preset duration. The traveling wave pulse is a half-cycle pulse.

[0050] It should be noted that the traveling wave pulse can be a voltage traveling wave pulse or a current traveling wave pulse, which is not limited by the application.

[0051] The polarity of the traveling wave pulse includes positive polarity and negative polarity. In the case that the polarity of the traveling wave pulse is positive, the amplitude of the traveling wave pulse is greater than the reference zero value. In the case that the polarity of the traveling wave pulse is negative, the amplitude of the traveling wave pulse is less than the reference zero value.

[0052] The preset duration can be 1ms, 2ms, 3ms, of course, the preset duration can also have other values, which is not limited by the application.

[0053] As a possible implementation, the fault position determination apparatus determines the traveling wave pulse on the power transmission line by capturing the transient signal, identifying and extracting the traveling wave feature from the transient signal, and analyzing and judging the traveling wave feature.

[0054] It should be noted that the above is a general description of the scheme for detecting the traveling wave pulse on the power transmission line by the fault position determination apparatus. The specific scheme for detecting the traveling wave pulse on the power transmission line by the fault position determination apparatus can refer to the existing scheme, which will not be described in detail herein.

[0055] After the fault position determination apparatus detects the traveling wave pulse on the power transmission line, from the time when the fault position determination apparatus detects the traveling wave pulse on the power transmission line, every traveling wave pulse on the power transmission line is captured within a preset time length, and each traveling wave pulse is analyzed to obtain the pulse frequency, the pulse rising edge length, and the polarity of each traveling wave pulse.

[0056] For example, the fault position determination apparatus determines the pulse frequency of the traveling wave pulse by the autocorrelation function. The specific scheme can refer to the existing scheme, which will not be described in detail herein.

[0057] For the polarity of the traveling wave pulse, the fault position determination apparatus analyzes the initial wave head of the traveling wave pulse by wavelet transform to obtain the polarity of the traveling wave pulse. The specific scheme can refer to the existing scheme, which will not be described in detail herein.

[0058] For the pulse rising edge length of the traveling wave pulse, the fault position determination apparatus obtains the time corresponding to the first amplitude and the time corresponding to the second amplitude of the pulse rising edge of the traveling wave pulse; and takes the difference between the time corresponding to the second amplitude and the time corresponding to the first amplitude as the pulse rising edge length of the traveling wave pulse. The ratio of the first amplitude to the maximum value of the amplitude of the traveling wave pulse is 1 / 10, and the ratio of the second amplitude to the maximum value of the amplitude of the traveling wave pulse is 9 / 10.

[0059] Specifically, the fault position determination apparatus determines the extreme value of the traveling wave pulse, and after obtaining the extreme value of the traveling wave pulse, the first amplitude and the second amplitude can be determined. Finally, the fault position determination apparatus determines the time corresponding to the first amplitude and the time corresponding to the second amplitude by wavelet transform, and finally takes the difference between the two times as the pulse rising edge length of the traveling wave pulse.

[0060] In this way, since the starting stage and the ending stage of the pulse rising edge of the traveling wave pulse are greatly affected by the outside world and are unstable, by taking the difference between the time corresponding to the second amplitude and the time corresponding to the first amplitude as the pulse rising edge length of the traveling wave pulse, the accuracy of determining the pulse rising edge length of the traveling wave pulse can be improved.

[0061] S202, the fault position determination device determines at least one reflected traveling wave pulse of the target traveling wave pulse in the plurality of traveling wave pulses according to the pulse frequency, the pulse rising edge length and the polarity of each traveling wave pulse in the plurality of traveling wave pulses.

[0062] Wherein, the target traveling wave pulse is the traveling wave pulse in the plurality of traveling wave pulses whose wave head reaches the fault position determination device earliest.

[0063] As a possible implementation, the fault position determination device takes the traveling wave pulse in the plurality of traveling wave pulses whose pulse frequency is the same as that of the target traveling wave pulse as the first traveling wave pulse, and obtains at least one first traveling wave pulse. Then, the fault position determination device takes the traveling wave pulse in the at least one first traveling wave pulse whose polarity is the same as that of the target traveling wave pulse as the second traveling wave pulse, and obtains at least one second traveling wave pulse. Then, the fault position determination device determines the reflected traveling wave pulse of the target traveling wave pulse in the at least one second traveling wave pulse according to the pulse rising edge length of the at least one second traveling wave pulse and the pulse rising edge length of the target traveling wave pulse.

[0064] It should be noted that the specific description of this possible implementation can refer to the related description in the subsequent part of the specific embodiment of the present application, which is not described herein.

[0065] S203, the fault position determination device determines the target distance according to the first time and the second time.

[0066] Wherein, the target distance is the distance between the fault position on the power transmission line and the fault position determination device; the first time is the time when the wave head of the target traveling wave pulse reaches the fault position determination device, and the second time is the time when the wave head of the reflected traveling wave pulse reaches the fault position determination device, and the number of the second time is one or more.

[0067] As a possible implementation, in the case where the number of the second time is 1, the fault position determination device determines the target distance according to the first relationship:

[0068]

[0069] Wherein, x represents the target distance, represents the second time, represents the first time, V represents the wave speed of the traveling wave pulse, and n represents the order of the reflected traveling wave pulse corresponding to the second time in the target sequence, and the target sequence is the sequence of the time when the wave head of the at least one reflected traveling wave pulse reaches the fault position determination device from early to late.

[0070] The order of the reflected traveling wave pulse corresponding to the second time in the target sequence can be any order, for example, the order of the reflected traveling wave pulse corresponding to the second time in the target sequence is 1, 2, 3, and 4. Of course, the order can also have other values, which are not limited in the present application.

[0071] It can be understood that the smaller the order of the reflected traveling wave pulse in the target sequence, the earlier the reflected traveling wave pulse reaches the fault position determination device, and the larger the order of the reflected traveling wave pulse in the target sequence, the later the reflected traveling wave pulse reaches the fault position determination device. For example, one reflected traveling wave pulse has an order of 1 in the target sequence, and another reflected traveling wave pulse has an order of 2 in the target sequence. The reflected traveling wave pulse with an order of 1 reaches the fault position determination device earlier than the reflected traveling wave pulse with an order of 2.

[0072] Preferably, the order of the reflected traveling wave pulse corresponding to the second time in the target sequence is 1. The later the reflected traveling wave pulse reaches the fault position determination device, the more interference the reflected traveling wave pulse receives. The earlier the reflected traveling wave pulse reaches the fault position determination device, the less interference the reflected traveling wave pulse receives. The target distance is determined based on the reflected traveling wave pulse that reaches the fault position determination device earlier, which can improve the accuracy of determining the fault position.

[0073] As another possible implementation, in the case where the number of second times is multiple, the fault position determination device determines an initial distance according to the first relationship for each of the multiple second times:

[0074]

[0075] wherein x represents the target distance, represents the second time, represents the first time, V represents the wave speed of the traveling wave pulse, and n represents the order of the reflected traveling wave pulse corresponding to the second time in the target sequence. The target sequence is an order from early to late of the time when the wave head of at least one reflected traveling wave pulse reaches the fault position determination device.

[0076] Subsequently, the fault position determination device takes the average of the multiple initial distances as the target distance.

[0077] Based on this possible implementation, in some cases, there can be errors in the second time. In this case, determining the target distance based on a single second time will result in an error in the determined target distance. By determining an initial distance according to one second time in the case where the number of second times is multiple, and subsequently taking the average of the multiple initial distances as the target distance, the accuracy of the determined target distance can be improved.

[0078] Based on S201-S203, after the fault location determination apparatus detects the traveling wave pulse on the power transmission line, it is indicated that a fault occurs on the power transmission line. The pulse frequency, pulse rising edge length and polarity of each traveling wave pulse in the target time period are obtained. Since the target traveling wave pulse is the traveling wave pulse whose wave head arrives at the fault location determination apparatus earliest among the multiple traveling wave pulses, it is indicated that the target traveling wave pulse is the traveling wave directly generated by the fault. According to the pulse frequency, pulse rising edge length and polarity of each traveling wave pulse, the reflected traveling wave pulse of the target traveling wave pulse can be determined. Therefore, the reflected traveling wave pulse of the target traveling wave pulse can be determined from the multiple traveling wave pulses. After the reflected traveling wave pulse of the target traveling wave pulse is determined, the distance between the fault location on the power transmission line and the fault location determination apparatus can be determined according to the first time when the wave head of the target traveling wave pulse arrives at the fault location determination apparatus and the second time when the wave head of the reflected traveling wave pulse arrives at the fault location determination apparatus, thereby improving the accuracy of determining the fault location.

[0079] The above is a general description of the fault location determination method provided by the present application. The fault location determination method provided by the present application will be further described below.

[0080] Figure 3 The flowchart of another fault location determination method provided by the present application is shown in FIG. 2B. The S202 provided by the embodiments of the present application can include the following steps: Figure 3

[0081] S301, the fault location determination apparatus takes the traveling wave pulse with the same pulse frequency as that of the target traveling wave pulse as the first traveling wave pulse from the multiple traveling wave pulses, and obtains at least one first traveling wave pulse.

[0082] As a possible implementation manner, the fault location determination apparatus compares the pulse frequency of each traveling wave pulse except the target traveling wave pulse from the multiple traveling wave pulses with the pulse frequency of the target traveling wave pulse. If the pulse frequency of the traveling wave pulse is the same as that of the target traveling wave pulse, the traveling wave pulse is the first traveling wave pulse. If the pulse frequency of the traveling wave pulse is not the same as that of the target traveling wave pulse, the traveling wave pulse is not the first traveling wave pulse. Then, at least one first traveling wave pulse is obtained.

[0083] S302, the fault location determination apparatus takes the traveling wave pulse with the same polarity as that of the target traveling wave pulse as the second traveling wave pulse from the at least one first traveling wave pulse, and obtains at least one second traveling wave pulse.

[0084] ​As a possible implementation manner, the fault position determination apparatus compares the polarity of each first traveling wave pulse with the polarity of the target traveling wave pulse, if the polarity of the first traveling wave pulse is the same as the polarity of the target traveling wave pulse, the first traveling wave pulse is the second traveling wave pulse, if the polarity of the first traveling wave pulse is not the same as the polarity of the target traveling wave pulse, the first traveling wave pulse is not the second traveling wave pulse, and then the at least one second traveling wave pulse is obtained.

[0085] S303, the fault position determination apparatus determines the reflected traveling wave pulse of the target traveling wave pulse in the at least one second traveling wave pulse according to the pulse rising edge duration of the at least one second traveling wave pulse and the pulse rising edge duration of the target traveling wave pulse.

[0086] As a possible implementation manner, the fault position determination apparatus compares the pulse rising edge duration of each second traveling wave pulse with the pulse rising edge duration of the target traveling wave pulse, if the pulse rising edge duration of the second traveling wave pulse is the same as the pulse rising edge duration of the target traveling wave pulse, the second traveling wave pulse is the reflected traveling wave pulse of the target traveling wave pulse, if the pulse rising edge duration of the second traveling wave pulse is not the same as the pulse rising edge duration of the target traveling wave pulse, the second traveling wave pulse is not the reflected traveling wave pulse of the target traveling wave pulse, and the reflected traveling wave pulse of the target traveling wave pulse is obtained.

[0087] As another possible implementation manner, the fault position determination apparatus takes the difference between the pulse rising edge duration of the target traveling wave pulse and the target product as one end of the target duration interval, takes the sum of the pulse rising edge duration of the target traveling wave pulse and the target product as the other end of the target duration interval, and obtains the target duration interval, the target product is the product of the pulse rising edge duration of the target traveling wave pulse and a preset coefficient. Then, the second traveling wave pulse with the pulse rising edge duration in the target duration interval in the at least one second traveling wave pulse is taken as the reflected traveling wave pulse of the target traveling wave pulse.

[0088] It should be noted that the specific description of the possible implementation manner can refer to the related description in the subsequent part of the specific embodiment of the present application, which is not described herein.

[0089] Based on S302-S303, since the target traveling wave pulse and its reflected traveling wave pulse are from the same fault, the pulse frequency, the pulse rising edge duration and the polarity of the target traveling wave pulse and its reflected traveling wave pulse are similar, therefore, the reflected traveling wave pulse of the target traveling wave pulse can be determined by screening the pulse frequency, the pulse rising edge duration and the polarity of the multiple traveling wave pulses.

[0090] Figure 4A flowchart of another fault location determination method provided by the present application is shown in FIG. 3, and the S303 provided by the embodiments of the present application can include the following steps. Figure 4

[0091] S401, the fault location determination device takes the difference between the pulse rising edge duration of the target traveling wave pulse and the target product as one end of the target time duration interval, takes the sum of the pulse rising edge duration of the target traveling wave pulse and the target product as the other end of the target time duration interval, and obtains the target time duration interval.

[0092] The target product is the product of the pulse rising edge duration of the target traveling wave pulse and a preset coefficient.

[0093] It should be noted that the preset coefficient is less than 1, for example, the preset coefficient can be 0.1, 0.2, 0.3, of course, the preset coefficient can also be other numerical values, and the present application does not make specific limitations thereto.

[0094] As a possible implementation manner, taking the pulse rising edge duration of the target traveling wave pulse as 10 microseconds and the preset coefficient as 0.1 for example, the fault location determination device determines the target product as 10 microseconds x 0.1 = 1 microsecond, then determines one end of the target time duration interval as 10 microseconds - 1 microsecond = 9 microseconds, determines the other end of the target time duration interval as 10 microseconds + 1 microsecond = 11 microseconds, and determines the target time duration interval as [9 microseconds, 11 microseconds].

[0095] S402, the fault location determination device takes the second traveling wave pulse with the pulse rising edge duration located in the target time duration interval as the reflected traveling wave pulse of the target traveling wave pulse.

[0096] As a possible implementation manner, the fault location determination device judges whether the pulse rising edge duration of each second traveling wave pulse in the at least one second traveling wave pulse is located in the target time duration interval, if the pulse rising edge duration of the second traveling wave pulse is located in the target time duration interval, the second traveling wave pulse is the reflected traveling wave pulse of the target traveling wave pulse, if the pulse rising edge duration of the second traveling wave pulse is located outside the target time duration interval, the second traveling wave pulse is not the reflected traveling wave pulse of the target traveling wave pulse.

[0097] ​Based on S401-S402, in an ideal case, the rising edge duration of the target traveling wave pulse and the rising edge duration of the reflected traveling wave pulse thereof are the same, however, in an actual case, due to the influence of the complex environment in the power transmission line, the rising edge duration of the reflected traveling wave pulse of the target traveling wave pulse is slightly different from the rising edge duration of the target traveling wave pulse, since the middle point of the target duration interval is the rising edge duration of the target traveling wave pulse, by taking the second traveling wave pulse with the rising edge duration located in the target duration interval as the reflected traveling wave pulse of the target traveling wave pulse, the requirement for the rising edge duration of the reflected traveling wave pulse can be appropriately relaxed, thereby improving the flexibility of determining the reflected traveling wave pulse.

[0098] The above describes the scheme provided by the embodiments of the present application from the perspective of the fault location determination device performing the fault location determination method. In order to implement the above functions, the fault location determination device includes the hardware structure and / or software module corresponding to each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is implemented in hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0099] The embodiments of the present application can divide the fault location determination device into functional modules according to the above method examples, for example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or software functional module. Optionally, the division of modules in the embodiments of the present application is illustrative, and is only a logical functional division. In actual implementation, there can be another division manner. In addition, the "module" here can refer to a specific application-specific integrated circuit (ASIC), a circuit, a processor and a memory executing one or more software or firmware programs, an integrated logic circuit, and / or other devices that can provide the above functions.

[0100] In the case of adopting functional module division, Figure 5 A structural schematic diagram of a fault location determination device is shown. As Figure 5 shown, the fault location determination device 50 includes an acquisition module 501 and a processing module 502.

[0101] In some embodiments, the fault location determination device 50 can further include a storage module (Figure 5 The memory 602 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM), or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium, or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to this.

[0102] In the case of implementing the functions of the above-mentioned functional modules in the form of hardware, Figure 6 The structure of another fault location determination apparatus is shown. As shown in the figure, the fault location determination apparatus 60 includes a processor 601, a memory 602 and a bus 603. The processor 601 and the memory 602 can be connected through the bus 603. Figure 6 The processor 601 is the control center of the fault location determination apparatus 60, and can be one processor or a general term of multiple processing elements. For example, the processor 601 can be a general central processing unit (CPU), or other general-purpose processor, etc. The general-purpose processor can be a microprocessor or any conventional processor, etc.

[0103] As an embodiment, the processor 601 can include one or more CPUs, such as the CPU 0 and the CPU 1 shown in the figure.

[0104] As an embodiment, the processor 601 can include one or more CPUs, such as the CPU 0 and the CPU 1 shown in the figure. Figure 6

[0105] The memory 602 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM), or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium, or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to this.

[0106] As a possible implementation, the memory 602 can exist independently of the processor 601, and the memory 602 can be connected to the processor 601 through the bus 603, for storing instructions or program codes. When the processor 601 invokes and executes the instructions or program codes stored in the memory 602, the fault location determination method provided by the embodiments of the present application can be implemented.

[0107] In another possible implementation, the memory 602 can also be integrated with the processor 601.

[0108] ​The bus 603 can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, Figure 6 Only one thick line is used to represent the bus in the figure, but it does not mean that there is only one bus or only one type of bus.

[0109] It should be noted that, Figure 6 The structure shown does not constitute a limitation on the fault location determination apparatus 60. In addition to the components shown, Figure 6 The fault location determination apparatus 60 can include more or fewer components than shown, or combine certain components, or different component arrangements.

[0110] As an example, in combination with Figure 5 The functions implemented by the acquisition module 501 and the processing module 502 in the fault location determination apparatus 50 are the same as the functions of the processor 601 in Figure 6

[0111] Optionally, as Figure 6 The fault location determination apparatus 60 provided in the embodiments of the present application can further include a communication interface 604.

[0112] The communication interface 604 is configured to connect with other devices through a communication network. The communication network can be an Ethernet, a wireless access network, a wireless local area network (WLAN), or the like. The communication interface 604 can include a receiving unit configured to receive data, and a sending unit configured to send data.

[0113] In a possible implementation, in the fault location determination apparatus 60 provided in the embodiments of the present application, the communication interface 604 can also be integrated in the processor 601, which is not limited in the embodiments of the present application.

[0114] ​As a possible product form, the fault position determination apparatus can also be implemented using one or more field programmable gate arrays (FPGAs), programmable logic devices (PLDs), controllers, state machines, gated logic, discrete hardware components, any other suitable circuitry, or any combination of circuitry capable of implementing the functionality described throughout this application.

[0115] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of functional units is exemplified. In actual application, the above-mentioned functions can be completed by different functional units according to needs, that is, the internal structure of the device is divided into different functional units to complete all or part of the functions described above. The specific working process of the above-mentioned system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0116] The embodiments of the present application also provide a computer readable storage medium having stored thereon a computer program or instructions, which, when executed by a computer, cause the computer to perform the steps of the method flow illustrated in the foregoing method embodiments.

[0117] The embodiments of the present application provide a computer program product containing instructions, which, when executed on a computer, cause the computer to perform the steps of the method flow illustrated in the foregoing method embodiments.

[0118] The embodiments of the present application provide a chip system, comprising: a processor and an interface circuit; the interface circuit is used for receiving a computer program or instructions and transmitting to the processor; the processor is used for executing the computer program or instructions, so that the chip system performs the steps of the method flow illustrated in the foregoing method embodiments.

[0119] The computer readable storage medium, for example, can be, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium include: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), registers, a portable compact disc read-only memory (CD-ROM), an optical memory, a magnetic memory, or any suitable combination of the foregoing. A specific example of the computer readable storage medium is the computer program product described herein. The computer readable storage medium can be coupled to the processor such that the processor can read information from, and write information to, the computer readable storage medium. In the alternative, the computer readable storage medium can be integral to the processor. The computer readable storage medium can be a tangible or a non-transitory computer readable storage medium. Accordingly, the computer readable storage medium can be, for example, but is not limited to, portable computer diskette, compact disc, optical storage, magnetic storage, or any suitable combination thereof.

[0120] Since the fault location determination apparatus, the computer readable storage medium, and the computer program product provided by the embodiments can be applied to the fault location determination method provided by the embodiments, the technical effects that can be achieved by the embodiments are also referable to the method embodiments, which will not be described herein again.

[0121] Although the present application is described herein in relation to various embodiments, it will be appreciated that other variations and modifications of the embodiments disclosed herein can become apparent to those skilled in the art upon reading the specification and drawings.

[0122] Although the present application is described herein in relation to various embodiments, it will be appreciated that other variations and modifications of the embodiments disclosed herein can become apparent to those skilled in the art upon reading the specification and drawings.

[0122] Although the present application is described herein in relation to various embodiments, it will be appreciated that other variations and modifications of the embodiments disclosed herein can become apparent to those skilled in the art upon reading the specification and drawings.

Claims

1. A fault location determination method characterized by, The fault position determination method is applied to a fault position determination device, and the method comprises: In the case that the fault position determination device detects a traveling wave pulse on the power transmission line, the pulse frequency, the pulse rising edge length and the polarity of each traveling wave pulse in a plurality of traveling wave pulses in a target time period are obtained; the starting moment of the target time period is the moment when the fault position determination device detects the traveling wave pulse on the power transmission line, and the length of the target time period is a preset length, and the traveling wave pulse is a half-cycle pulse; At least one reflected traveling wave pulse of a target traveling wave pulse in the plurality of traveling wave pulses is determined according to the pulse frequency, the pulse rising edge length and the polarity of each traveling wave pulse in the plurality of traveling wave pulses; the target traveling wave pulse is a traveling wave pulse in the plurality of traveling wave pulses, and the wave head of the traveling wave pulse reaches the fault position determination device earliest; A target distance is determined according to a first moment and a second moment; the target distance is the distance between the fault position on the power transmission line and the fault position determination device; the first moment is the moment when the wave head of the target traveling wave pulse reaches the fault position determination device, and the second moment is the moment when the wave head of the reflected traveling wave pulse reaches the fault position determination device, and the number of the second moment is one or more.

2. The method of claim 1, wherein, The determination of the reflected traveling wave pulse of the target traveling wave pulse in the plurality of traveling wave pulses according to the pulse frequency, the pulse rising edge length and the polarity of each traveling wave pulse in the plurality of traveling wave pulses comprises: A first traveling wave pulse in the plurality of traveling wave pulses, whose pulse frequency is the same as that of the target traveling wave pulse, is obtained as at least one first traveling wave pulse; A second traveling wave pulse in the at least one first traveling wave pulse, whose polarity is the same as that of the target traveling wave pulse, is obtained as at least one second traveling wave pulse; The reflected traveling wave pulse of the target traveling wave pulse in the at least one second traveling wave pulse is determined according to the pulse rising edge length of the at least one second traveling wave pulse and the pulse rising edge length of the target traveling wave pulse.

3. The method of claim 2, wherein, The determination of the reflected traveling wave pulse of the target traveling wave pulse in the at least one second traveling wave pulse according to the pulse rising edge length of the at least one second traveling wave pulse and the pulse rising edge length of the target traveling wave pulse comprises: A difference between the pulse rising edge length of the target traveling wave pulse and a target product is taken as one end of a target length interval, and a sum of the pulse rising edge length of the target traveling wave pulse and the target product is taken as the other end of the target length interval, so as to obtain the target length interval; the target product is the product of the pulse rising edge length of the target traveling wave pulse and a preset coefficient, and the preset coefficient is less than 1; A second traveling wave pulse in the at least one second traveling wave pulse, whose pulse rising edge length is located in the target length interval, is taken as the reflected traveling wave pulse of the target traveling wave pulse.

4. The method of claim 1, wherein, The pulse rising edge length of each traveling wave pulse in the plurality of traveling wave pulses in the target time period is obtained. For each of the multiple traveling wave pulses, a first amplitude corresponding time and a second amplitude corresponding time in a pulse rising edge of the traveling wave pulse are obtained; the first amplitude is 1 / 10 of a maximum value of an amplitude of the traveling wave pulse, and the second amplitude is 9 / 10 of the maximum value of the amplitude of the traveling wave pulse; A difference between the second amplitude corresponding time and the first amplitude corresponding time is taken as a pulse rising edge length of the traveling wave pulse.

5. The method according to any one of claims 1 to 4, characterized in that, In a case where the number of the second times is one, the target distance is determined according to the first time and the second time, including: The target distance is determined according to the first relationship: wherein x represents the target distance, represents the second time, represents the first time, V represents the wave velocity of the traveling wave pulse, and n represents the order of the reflected traveling wave pulse corresponding to the second time in the target sequence, which is an order from early to late of the time when the wave head of the at least one reflected traveling wave pulse reaches the fault location determination device.

6. The method of claim 5, wherein, The reflected traveling wave pulse corresponding to the second time has an order of 1 in the target sequence.

7. The method according to any one of claims 1 to 4, characterized in that, In a case where the number of the second times is multiple, the target distance is determined according to the first time and the second time, including: For each of the multiple second times, an initial distance is determined according to the first relationship: wherein x represents the target distance, represents the second time, represents the first time, V represents the wave velocity of the traveling wave pulse, and n represents the order of the reflected traveling wave pulse corresponding to the second time in the target sequence, which is an ordering of the times when the wave fronts of the at least one reflected traveling wave pulse arrive at the fault location determination device from early to late. An average of the multiple initial distances is taken as the target distance.

8. A fault location determination apparatus characterized by comprising: The apparatus includes an obtaining module and a processing module; The obtaining module is configured to, in a case where the fault position determination apparatus detects a traveling wave pulse on the power transmission line, obtain a pulse frequency, a pulse rising edge length and a polarity of each of multiple traveling wave pulses in a target time period; a start time of the target time period is a time at which the fault position determination apparatus detects the traveling wave pulse on the power transmission line, a length of the target time period is a preset length, and the traveling wave pulse is a half-cycle pulse; The processing module is configured to determine at least one reflected traveling wave pulse of a target traveling wave pulse in the multiple traveling wave pulses according to the pulse frequency, the pulse rising edge length and the polarity of each of the multiple traveling wave pulses; the target traveling wave pulse is a traveling wave pulse in the multiple traveling wave pulses, a wave head of which arrives at the fault position determination apparatus earliest; The processing module is further configured to determine a target distance according to a first time and a second time; the target distance is a distance between a fault position on the power transmission line and the fault position determination apparatus; the first time is a time at which a wave head of the target traveling wave pulse arrives at the fault position determination apparatus, and the second time is a time at which a wave head of the reflected traveling wave pulse arrives at the fault position determination apparatus, and the number of the second times is one or more.

9. A fault location determination apparatus characterized by comprising: The fault position determination apparatus includes a processor coupled with a memory, and the memory is configured to store programs or instructions, when the programs or instructions are executed by the processor, the apparatus executes the method in any one of claims 1 to 7.

10. A computer readable storage medium having stored thereon a computer program or instructions, characterized in that, The computer programs or instructions, when executed, cause the computer to execute the method in any one of claims 1 to 7.

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