CN112394257A - Method and device for determining line fault type - Google Patents
Method and device for determining line fault type Download PDFInfo
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- CN112394257A CN112394257A CN202011224952.3A CN202011224952A CN112394257A CN 112394257 A CN112394257 A CN 112394257A CN 202011224952 A CN202011224952 A CN 202011224952A CN 112394257 A CN112394257 A CN 112394257A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R19/04—Measuring peak values or amplitude or envelope of ac or of pulses
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Abstract
The application discloses a method and a device for determining a line fault type. Wherein, the method comprises the following steps: determining a first judgment result according to the polarity of the initial traveling wave of the line to be protected; determining a second judgment result according to the amplitude of the initial traveling wave of the line to be protected, wherein the first judgment result and the second judgment result are both used for indicating the fault type of the line to be protected, and the fault type comprises the following steps: a fault occurs inside a line segment corresponding to the line to be protected or a fault occurs outside the line segment corresponding to the line to be protected; and when the first judgment result is consistent with the second judgment result, taking the fault type indicated by the first judgment result and/or the second judgment result as a target fault type of the line to be protected. The method and the device solve the technical problems that in the related technology, the detection is inaccurate due to the fact that the line fault is detected based on the power frequency electric quantity, and the line fault type cannot be determined definitely.
Description
Technical Field
The present invention relates to the field of detecting line faults, and in particular, to a method and an apparatus for determining a type of a line fault.
Background
Because the inertia of a direct current system in the alternating current and direct current hybrid power distribution network is small, the control response speed is high (high frequency, generally 10 kHz-500 kHz can be selected), under the control of the power electronic device at high frequency, the external characteristics of the current converter can be changed under the time scale of millisecond level, therefore, when the operating state of the ac/dc system changes after a fault occurs, the external characteristics of the inverter will also change, and in the related art, the line fault is detected based on the power frequency electric quantity, the sampling frequency of the power frequency electric quantity is not more than 1kHz, at this sampling frequency, the fault information typically extracted is actually a result of the interaction of both the line and the inverter in the ac/dc system, therefore, the method for detecting whether the line has a fault is easily interfered by the inverter, so that the detection is inaccurate, and the type of the fault of the line cannot be determined.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the application provides a method and a device for determining a line fault type, and aims to at least solve the technical problems that in the related technology, the detection is inaccurate and the line fault type cannot be determined definitely due to the fact that the line fault is detected based on the power frequency electrical quantity.
According to an aspect of the embodiments of the present application, there is provided a method for determining a line fault type, including: determining a first judgment result according to the polarity of the initial traveling wave of the line to be protected; determining a second judgment result according to the amplitude of the initial traveling wave of the line to be protected, wherein the first judgment result and the second judgment result are both used for indicating the fault type of the line to be protected, and the fault type comprises the following steps: a fault occurs inside a line segment corresponding to the line to be protected or a fault occurs outside the line segment corresponding to the line to be protected; and when the first judgment result is consistent with the second judgment result, taking the fault type indicated by the first judgment result and/or the second judgment result as a target fault type of the line to be protected.
Optionally, determining a first determination result according to the polarity of the initial traveling wave of the line to be protected includes: determining a first wave head polarity corresponding to an initial traveling wave on a first side of a line to be protected; determining a second wave head polarity corresponding to the initial traveling wave of the second side of the line to be protected, wherein the first side and the second side are opposite sides of the line to be protected; and determining a first judgment result according to the fault direction corresponding to the first wave head polarity and the second wave head polarity.
Optionally, determining a first determination result according to the fault direction corresponding to the first wave head polarity and the second wave head polarity includes: when the fault directions corresponding to the first wave head polarity and the second wave head polarity are positive direction faults, determining that the fault type indicated by the first judgment result is that a fault occurs in the line segment corresponding to the line to be protected; and when at least one fault direction corresponding to the first wave head polarity and the second wave head polarity is not a positive fault, determining that the fault type indicated by the first judgment result is a fault outside a line segment corresponding to the line to be protected.
Optionally, before determining the first determination result according to the fault direction corresponding to the first wave head polarity and the second wave head polarity, the method includes: when the polarity of the integral wave head is a positive value, determining that the fault direction corresponding to the polarity of the integral wave head is a reverse fault, wherein the reverse fault is used for indicating that a fault occurs in a line segment corresponding to a line to be protected; and when the polarity of the integral wave head is a negative value, determining that the fault direction corresponding to the polarity of the integral wave head is a positive fault, wherein the positive fault is used for indicating that faults occur outside the line segment corresponding to the line to be protected.
Optionally, the determining of the polarity of the overall wave head includes: collecting the polarity of the initial traveling wave of the voltage and the polarity of the initial traveling wave of the current; when the polarity of the voltage initial traveling wave is consistent with that of the current initial traveling wave, determining that the polarity of the integral wave head is a positive value; when the polarity of the voltage initial traveling wave is inconsistent with that of the current initial traveling wave; the overall wave front polarity is determined to be negative.
Optionally, determining a second determination result according to the amplitude of the initial traveling wave of the line to be protected, where the determining includes: acquiring a first amplitude of a forward traveling wave corresponding to the initial traveling wave; acquiring a second amplitude of the reverse traveling wave corresponding to the initial traveling wave; and determining a second judgment result according to the first amplitude and the second amplitude.
Optionally, determining a second determination result according to the first amplitude and the second amplitude includes: when the ratio of the first amplitude to the second amplitude is greater than 1, determining that the fault is a reverse fault, wherein the reverse fault is used for indicating that the fault occurs in a line segment corresponding to the line to be protected; and when the ratio of the first amplitude to the second amplitude is less than 1, determining that the fault is a positive direction fault, wherein the positive direction fault is used for indicating that a fault occurs outside a line segment corresponding to the line to be protected.
According to an aspect of the embodiments of the present application, there is also provided an apparatus for determining a line fault type, including: the first determining module is used for determining a first judgment result according to the polarity of the initial travelling wave of the line to be protected; a second determining module, configured to determine a second determination result according to an amplitude of an initial traveling wave of a line to be protected, where the first determination result and the second determination result are both used to indicate a fault type of the line to be protected, where the fault type includes: a fault occurs inside a line segment corresponding to the line to be protected or a fault occurs outside the line segment corresponding to the line to be protected; and the third determining module is used for taking the fault type indicated by the first judging result and/or the second judging result as a target fault type of the line to be protected when the first judging result is consistent with the second judging result.
According to another aspect of the embodiments of the present application, there is also provided a non-volatile storage medium including a stored program, wherein the apparatus in which the non-volatile storage medium is controlled to perform any one of the methods of determining the type of line fault when the program is running.
According to another aspect of the embodiments of the present application, there is also provided a processor for executing a program stored in a memory, wherein the program executes any one of the methods for determining a type of line fault.
In the embodiment of the application, whether a fault occurs in the line is detected based on the polarity and the amplitude of the traveling wave, and the fault type of the line is determined, so that the fault is determined according to the polarity of the initial traveling wave and the amplitude of the initial traveling wave, the fault type is determined, and the fault detection purpose based on the traveling wave is achieved, therefore, the technical effects of rapidly and accurately detecting whether the fault occurs in the line and determining the fault type are achieved, and the technical problems that the fault type of the line cannot be determined clearly and the detection is inaccurate due to the fact that the fault of the line is detected based on the power frequency electrical quantity in the related technology are solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic flow chart diagram of a method for determining a route fault type according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an apparatus for determining a route fault type according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In accordance with an embodiment of the present application, there is provided an embodiment of a method for determining a type of line fault, it being noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than that presented herein.
Fig. 1 is a method for determining a route fault type according to an embodiment of the present application, as shown in fig. 1, the method includes the following steps:
step S102, determining a first judgment result according to the polarity of the initial traveling wave of the line to be protected;
step S104, determining a second judgment result according to the amplitude of the initial traveling wave of the line to be protected, wherein the first judgment result and the second judgment result are both used for indicating the fault type of the line to be protected, and the fault type comprises: a fault occurs inside a line segment corresponding to the line to be protected or a fault occurs outside the line segment corresponding to the line to be protected;
and step S106, when the first judgment result is consistent with the second judgment result, taking the fault type indicated by the first judgment result and/or the second judgment result as a target fault type of the line to be protected.
In the method for determining the line fault type, firstly, a first judgment result is determined according to the polarity of the initial travelling wave of the line to be protected; and then determining a second judgment result according to the amplitude of the initial traveling wave of the line to be protected, wherein the first judgment result and the second judgment result are both used for indicating the fault type of the line to be protected, and the fault type comprises the following steps: a fault occurs inside a line segment corresponding to the line to be protected or a fault occurs outside the line segment corresponding to the line to be protected; finally, when the first judgment result is consistent with the second judgment result, the fault type indicated by the first judgment result and/or the second judgment result is used as a target fault type of the line to be protected, so that the purpose of detecting the fault based on the traveling wave is achieved, the technical effects of quickly and accurately detecting whether the line has the fault and determining the fault type are achieved, and the technical problems that the detection is inaccurate and the line fault type cannot be clearly determined due to the fact that the line fault is detected based on the power frequency electrical quantity in the related technology are solved.
It can be understood that, because the traveling wave has the characteristics of high frequency and short existence time, the sampling rate of the protection according to the traveling wave principle is generally in the interval of 10kHz to 500kHz, and the control of the converter is not enough to change under the time scale. Therefore, the traveling wave characteristic after the fault is only the result of the system line fault and is irrelevant to the control of the power electronic converter, the protection based on the traveling wave principle can meet the requirement of a high-voltage alternating current-direct current hybrid power distribution network, and the method is suitable for the conditions of different control strategies.
In some optional embodiments of the present application, the determining the first determination result according to the polarity of the initial traveling wave of the line to be protected may be implemented by the following steps: determining a first wave head polarity corresponding to an initial traveling wave on a first side of a line to be protected; determining a second wave head polarity corresponding to the initial traveling wave of the second side of the line to be protected, wherein the first side and the second side are opposite sides of the line to be protected; the first determination result is determined according to the fault direction corresponding to the first wave head polarity and the second wave head polarity, for example, A, B is respectively arranged on two sides of the line, that is, A, B is respectively arranged on two ends of the line.
Specifically, the first judgment result is determined according to the fault direction corresponding to the first wave head polarity and the second wave head polarity as follows: when the fault directions corresponding to the first wave head polarity and the second wave head polarity are positive direction faults, determining that the fault type indicated by the first judgment result is that a fault occurs in the line segment corresponding to the line to be protected; and when at least one fault direction corresponding to the first wave head polarity and the second wave head polarity is not a positive fault, determining that the fault type indicated by the first judgment result is a fault outside a line segment corresponding to the line to be protected.
It should be noted that the first wave head polarity and the second wave head polarity form an overall wave head polarity, and before determining the first determination result according to the fault direction corresponding to the first wave head polarity and the second wave head polarity, the fault direction may be determined in the following manner, specifically, when the overall wave head polarity is a positive value, the fault direction corresponding to the overall wave head polarity is determined to be a reverse fault; when the overall wave head polarity is a negative value, it is determined that the fault direction corresponding to the overall wave head polarity is a positive-direction fault, it is easy to notice that the overall wave head polarity is a positive value, that is, the first wave head polarity and the second wave head polarity are both positive values, the overall wave head polarity is a negative value, that is, the first wave head polarity and the second wave head polarity are both negative values, it needs to be stated that the positive-direction fault is used for indicating that a fault occurs outside a line segment corresponding to a line to be protected, and the reverse-direction fault is used for indicating that a fault occurs inside a line segment corresponding to the line to be protected.
In some optional embodiments of the present application, the determining manner of the overall wave head polarity includes, but is not limited to: collecting the polarity of the initial traveling wave of the voltage and the polarity of the initial traveling wave of the current; determining the polarity of the integral wave head according to the polarity of the voltage initial traveling wave and the polarity of the current initial traveling wave, specifically, when the polarity of the voltage initial traveling wave is consistent with the polarity of the current initial traveling wave, the polarity of the integral wave head is a positive value, and when the polarity of the voltage initial traveling wave is inconsistent with the polarity of the current initial traveling wave; the overall wave front polarity is negative.
In some optional embodiments of the present application, the second determination result is determined according to the amplitude of the initial traveling wave of the line to be protected, and may be determined in the following manner: acquiring a first amplitude of a forward traveling wave corresponding to the initial traveling wave; acquiring a second amplitude of the reverse traveling wave corresponding to the initial traveling wave; and determining a second judgment result according to the first amplitude and the second amplitude.
It should be noted that, determining the second determination result according to the first amplitude and the second amplitude may be determined by: when the ratio of the first amplitude to the second amplitude is greater than 1, determining that the fault is a reverse fault, wherein the reverse fault is used for indicating that the fault occurs in a line segment corresponding to the line to be protected; when the ratio of the first amplitude to the second amplitude is less than 1, the positive direction fault is determined, the positive direction fault is used for indicating that a fault occurs outside a line segment corresponding to the line to be protected, and it should be noted that when the ratio of the first amplitude to the second amplitude is equal to 1, the positive direction fault is also determined.
Fig. 2 is an apparatus for determining a line fault type according to an embodiment of the present application, as shown in fig. 2, the apparatus including:
the first determining module 40 is configured to determine a first judgment result according to the polarity of the initial traveling wave of the line to be protected;
a second determining module 42, configured to determine a second determination result according to an amplitude of the initial traveling wave of the line to be protected, where the first determination result and the second determination result are both used to indicate a fault type of the line to be protected, where the fault type includes: a fault occurs inside a line segment corresponding to the line to be protected or a fault occurs outside the line segment corresponding to the line to be protected;
and the third determining module 44 is configured to, when the first determination result is consistent with the second determination result, use the fault type indicated by the first determination result and/or the second determination result as a target fault type occurring on the line to be protected.
In the apparatus for determining the line fault type, a first determining module 40 is configured to determine a first determination result according to a polarity of an initial traveling wave of a line to be protected; a second determining module 42, configured to determine a second determination result according to an amplitude of the initial traveling wave of the line to be protected, where the first determination result and the second determination result are both used to indicate a fault type of the line to be protected, where the fault type includes: a fault occurs inside a line segment corresponding to the line to be protected or a fault occurs outside the line segment corresponding to the line to be protected; the third determining module 44 is configured to, when the first determination result is consistent with the second determination result, use the fault type indicated by the first determination result and/or the second determination result as a target fault type of the line to be protected, so as to achieve a purpose of detecting a fault based on a traveling wave, thereby achieving a technical effect of quickly and accurately detecting whether the line has a fault and determining the type of the fault, and further solving a technical problem that the detection is inaccurate and the type of the line fault cannot be clearly determined due to the fact that the line fault is detected based on the power frequency electrical quantity in the related art.
In some optional embodiments of the present application, the determining manner of the overall wave head polarity includes, but is not limited to: collecting the polarity of the initial traveling wave of the voltage and the polarity of the initial traveling wave of the current; determining the polarity of the integral wave head according to the polarity of the voltage initial traveling wave and the polarity of the current initial traveling wave, specifically, when the polarity of the voltage initial traveling wave is consistent with the polarity of the current initial traveling wave, the polarity of the integral wave head is a positive value, and when the polarity of the voltage initial traveling wave is inconsistent with the polarity of the current initial traveling wave; the overall wave front polarity is negative.
In some optional embodiments of the present application, the second determination result is determined according to the amplitude of the initial traveling wave of the line to be protected, and may be determined in the following manner: acquiring a first amplitude of a forward traveling wave corresponding to the initial traveling wave; acquiring a second amplitude of the reverse traveling wave corresponding to the initial traveling wave; and determining a second judgment result according to the first amplitude and the second amplitude.
It should be noted that, determining the second determination result according to the first amplitude and the second amplitude may be determined by: when the ratio of the first amplitude to the second amplitude is greater than 1, determining that the fault is a reverse fault, wherein the reverse fault is used for indicating that the fault occurs in a line segment corresponding to the line to be protected; and when the ratio of the first amplitude to the second amplitude is less than 1, determining that the fault is a positive direction fault, wherein the positive direction fault is used for indicating that a fault occurs outside a line segment corresponding to the line to be protected.
According to the embodiment of the application, a nonvolatile storage medium is further provided, and the nonvolatile storage medium comprises a stored program, wherein when the program runs, the device where the nonvolatile storage medium is located is controlled to execute any method for determining the type of the line fault.
Specifically, the storage medium is used for storing program instructions for executing the following functions, and the following functions are realized:
determining a first judgment result according to the polarity of the initial traveling wave of the line to be protected; determining a second judgment result according to the amplitude of the initial traveling wave of the line to be protected, wherein the first judgment result and the second judgment result are both used for indicating the fault type of the line to be protected, and the fault type comprises the following steps: a fault occurs inside a line segment corresponding to the line to be protected or a fault occurs outside the line segment corresponding to the line to be protected; and when the first judgment result is consistent with the second judgment result, taking the fault type indicated by the first judgment result and/or the second judgment result as a target fault type of the line to be protected.
There is also provided, in accordance with an embodiment of the present application, a processor for executing a program stored in a memory, wherein the program executes any one of the methods for determining a type of line fault.
Specifically, the processor is configured to call a program instruction in the memory, and implement the following functions:
determining a first judgment result according to the polarity of the initial traveling wave of the line to be protected; determining a second judgment result according to the amplitude of the initial traveling wave of the line to be protected, wherein the first judgment result and the second judgment result are both used for indicating the fault type of the line to be protected, and the fault type comprises the following steps: a fault occurs inside a line segment corresponding to the line to be protected or a fault occurs outside the line segment corresponding to the line to be protected; and when the first judgment result is consistent with the second judgment result, taking the fault type indicated by the first judgment result and/or the second judgment result as a target fault type of the line to be protected.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (10)
1. A method of determining a type of line fault, comprising:
determining a first judgment result according to the polarity of the initial traveling wave of the line to be protected;
determining a second judgment result according to the amplitude of the initial traveling wave of the line to be protected, wherein the first judgment result and the second judgment result are both used for indicating the fault type of the line to be protected, and the fault type includes: a fault occurs inside a line segment corresponding to the line to be protected or a fault occurs outside the line segment corresponding to the line to be protected;
and when the first judgment result is consistent with the second judgment result, taking the fault type indicated by the first judgment result and/or the second judgment result as a target fault type of the line to be protected.
2. The method of claim 1, wherein determining the first determination result according to the polarity of the initial traveling wave of the line to be protected comprises:
determining a first wave head polarity corresponding to the initial traveling wave of the first side of the line to be protected;
determining a second wave head polarity corresponding to the initial traveling wave of the second side of the line to be protected, wherein the first side and the second side are opposite sides of the line to be protected;
and determining the first judgment result according to the fault direction corresponding to the first wave head polarity and the second wave head polarity.
3. The method of claim 2, wherein determining the first determination result according to the fault direction corresponding to the first wave head polarity and the second wave head polarity comprises:
when the fault directions corresponding to the first wave head polarity and the second wave head polarity are positive direction faults, determining that the fault type indicated by the first judgment result is that a fault occurs in a line segment corresponding to the line to be protected;
and when at least one fault direction corresponding to the first wave head polarity and the second wave head polarity is not a positive direction fault, determining that the fault type indicated by the first judgment result is a fault except for the line segment corresponding to the line to be protected.
4. The method according to claim 3, wherein the first and second wave head polarities constitute an overall wave head polarity, and before determining the first determination result according to the fault direction corresponding to the first and second wave head polarities, the method comprises:
when the integral wave head polarity is a positive value, determining that the fault direction corresponding to the integral wave head polarity is a reverse fault, wherein the reverse fault is used for indicating that a fault occurs in a line segment corresponding to the line to be protected;
and when the integral wave head polarity is a negative value, determining that the fault direction corresponding to the integral wave head polarity is a positive direction fault, wherein the positive direction fault is used for indicating that a fault occurs outside the line segment corresponding to the line to be protected.
5. The method of claim 4, wherein the determining the overall wave head polarity comprises:
collecting the polarity of the initial traveling wave of the voltage and the polarity of the initial traveling wave of the current;
when the polarity of the voltage initial traveling wave is consistent with that of the current initial traveling wave, determining that the polarity of the integral wave head is a positive value;
and when the polarity of the voltage initial traveling wave is inconsistent with the polarity of the current initial traveling wave, determining that the polarity of the integral wave head is a negative value.
6. The method of claim 1, wherein determining the second determination result according to the amplitude of the initial traveling wave of the line to be protected comprises:
acquiring a first amplitude of a forward traveling wave corresponding to the initial traveling wave;
acquiring a second amplitude of the reverse traveling wave corresponding to the initial traveling wave;
and determining a second judgment result according to the first amplitude and the second amplitude.
7. The method of claim 6, wherein determining a second determination based on the first amplitude value and the second amplitude value comprises:
when the ratio of the first amplitude to the second amplitude is greater than 1, determining that the fault is a reverse fault, wherein the reverse fault is used for indicating that a fault occurs in a line segment corresponding to the line to be protected;
and when the ratio of the first amplitude to the second amplitude is smaller than 1, determining that the fault is a positive direction fault, wherein the positive direction fault is used for indicating that a fault occurs outside a line segment corresponding to the line to be protected.
8. An apparatus for determining a type of line fault, comprising:
the first determining module is used for determining a first judgment result according to the polarity of the initial travelling wave of the line to be protected;
a second determining module, configured to determine a second determination result according to an amplitude of an initial traveling wave of a line to be protected, where the first determination result and the second determination result are both used to indicate a fault type of the line to be protected, where the fault type includes: a fault occurs inside a line segment corresponding to the line to be protected or a fault occurs outside the line segment corresponding to the line to be protected;
and a third determining module, configured to, when the first determination result is consistent with the second determination result, use a fault type indicated by the first determination result and/or the second determination result as a target fault type occurring on the line to be protected.
9. A non-volatile storage medium, comprising a stored program, wherein the program, when executed, controls a device in which the non-volatile storage medium is located to perform the method for determining a type of line fault according to any one of claims 1 to 7.
10. A processor for executing a program stored in a memory, wherein the program when executed performs the method of determining a type of line fault of any one of claims 1 to 7.
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| CN202011224952.3A CN112394257A (en) | 2020-11-05 | 2020-11-05 | Method and device for determining line fault type |
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| CN202011224952.3A CN112394257A (en) | 2020-11-05 | 2020-11-05 | Method and device for determining line fault type |
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Citations (6)
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