CN116400173A - Fault identification method for power transmission line - Google Patents
Fault identification method for power transmission line Download PDFInfo
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- CN116400173A CN116400173A CN202310659487.3A CN202310659487A CN116400173A CN 116400173 A CN116400173 A CN 116400173A CN 202310659487 A CN202310659487 A CN 202310659487A CN 116400173 A CN116400173 A CN 116400173A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
- H02J3/0012—Contingency detection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The application relates to the technical field of electric power, and provides a fault identification method, a system, a device, computer equipment, a storage medium and a computer program product of an electric transmission line. The method and the device can improve the efficiency and accuracy of determining the position information of the fault point on the power transmission line. The method comprises the following steps: under the condition of receiving a control instruction sent by a monitoring host, acquiring waveform information of the power transmission line according to the control instruction; the control instruction is generated by the monitoring host computer according to the alarm signal under the condition that the monitoring host computer receives the alarm signal sent by the monitoring slave computer; the alarm signal is generated by the monitoring slave machine under the condition that the monitoring slave machine does not receive the electric signal within the preset time; the monitoring host is arranged at the power supply end of the power transmission line; the monitoring slave is arranged at the power utilization end of the power transmission line; determining a fault waveform from the waveform information; and determining the position information of the fault point on the power transmission line according to the time difference that the fault waveform passes through the two ends of the power transmission line.
Description
Technical Field
The present disclosure relates to the field of power technology, and in particular, to a method, a system, an apparatus, a computer device, a storage medium, and a computer program product for fault identification of a power transmission line.
Background
With the development of power technology, the scale of the power grid is continuously expanding, the structure of the power grid is gradually complex, and the probability of faults of the power transmission line is also increasing. If the fault cannot be removed in time, huge losses will be caused. Therefore, how to efficiently determine the fault point of the power transmission line becomes an important research direction.
The conventional technology generally performs fault investigation on a power transmission line in a manual investigation mode, so as to determine the position information of a fault point on the power transmission line; however, in the face of a remote transmission line, the manual investigation requires much time, resulting in a low efficiency in determining the location information of the fault point on the transmission line.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a fault identification method, system, apparatus, computer device, computer readable storage medium and computer program product for an electric transmission line.
In a first aspect, the present application provides a fault identification method for a power transmission line. The method comprises the following steps:
under the condition of receiving a control instruction sent by a monitoring host, acquiring waveform information of a power transmission line according to the control instruction; the control instruction is generated by the monitoring host according to the alarm signal under the condition that the monitoring host receives the alarm signal sent by the monitoring slave; the alarm signal is generated by the monitoring slave machine under the condition that the monitoring slave machine does not receive an electric signal within a preset time; the monitoring host is arranged at the power supply end of the power transmission line; the monitoring slave is arranged at the power utilization end of the power transmission line;
Determining a fault waveform from the waveform information;
and determining the position information of the fault point on the power transmission line according to the time difference that the fault waveform passes through the two ends of the power transmission line.
In one embodiment, under the condition that a control command sent by a monitoring host is received, acquiring waveform information of the power transmission line according to the control command includes:
under the condition of receiving a control instruction sent by a monitoring host, acquiring a voltage value and a current value at two ends of the power transmission line;
and under the condition that the voltage value meets a preset fault voltage condition and the current value meets a preset fault current condition, acquiring waveform information of the power transmission line according to the control instruction.
In one embodiment, under the condition that a control command sent by a monitoring host is received, acquiring waveform information of the power transmission line according to the control command includes:
under the condition that a control command sent by a monitoring host is received, determining a power transmission line corresponding to the control command from a plurality of power transmission lines;
and acquiring waveform information of the power transmission line corresponding to the control instruction.
In one embodiment, the determining the fault waveform from the waveform information includes:
Determining fault waveform characteristic information according to the historical fault waveform;
and identifying a fault waveform from the waveform information according to the fault waveform characteristic information.
In one embodiment, the determining the location information of the fault point on the power transmission line according to the time difference that the fault waveform passes through two ends of the power transmission line includes:
acquiring a first time from the fault waveform to a first measurement point of the power transmission line and a second time from the fault waveform to a second measurement point of the power transmission line; the first measuring point and the second measuring point are respectively arranged at two ends of the power transmission line;
determining the time difference of the fault waveform passing through the two ends of the power transmission line according to the first time and the second time;
and determining the position information of the fault point on the power transmission line according to the time difference and the speed information of the fault waveform.
In one embodiment, after determining the location information of the fault point on the power transmission line according to the time difference that the fault waveform passes through the two ends of the power transmission line, the method further includes:
generating maintenance information according to the fault point position information on the power transmission line;
The maintenance information is sent to a maintenance terminal; the maintenance information is used for assisting in maintaining the fault point.
In a second aspect, the present application further provides a fault identification system for a power transmission line. The system comprises: the system comprises a central processing unit, a monitoring host arranged at a power supply end of a power transmission line and a monitoring slave arranged at a power utilization end of the power transmission line; the monitoring host is respectively connected with the monitoring slave and the central processing unit;
the monitoring slave is used for generating an alarm signal and sending the alarm signal to the monitoring host under the condition that the electric signal is not received within preset time;
the monitoring host is used for generating a control instruction according to the alarm signal under the condition that the alarm signal sent by the monitoring slave is received, and sending the control instruction to the central processing unit;
the central processing unit is used for acquiring waveform information of the power transmission line according to the control command under the condition that the control command sent by the monitoring host is received, determining a fault waveform from the waveform information, and determining fault point position information on the power transmission line according to the time difference that the fault waveform passes through two ends of the power transmission line.
In a third aspect, the present application further provides a fault identification device for a power transmission line. The device comprises:
the waveform acquisition module is used for acquiring waveform information of the power transmission line according to the control instruction under the condition that the control instruction sent by the monitoring host is received; the control instruction is generated by the monitoring host according to the alarm signal under the condition that the monitoring host receives the alarm signal sent by the monitoring slave; the alarm signal is generated by the monitoring slave machine under the condition that the monitoring slave machine does not receive an electric signal within a preset time; the monitoring host is arranged at the power supply end of the power transmission line; the monitoring slave is arranged at the power utilization end of the power transmission line;
the waveform determining module is used for determining a fault waveform from the waveform information;
and the position determining module is used for determining the position information of the fault point on the power transmission line according to the time difference that the fault waveform passes through the two ends of the power transmission line.
In a fourth aspect, the present application also provides a computer device. The computer device comprises a memory storing a computer program and a processor which when executing the computer program performs the steps of:
Under the condition of receiving a control instruction sent by a monitoring host, acquiring waveform information of a power transmission line according to the control instruction; the control instruction is generated by the monitoring host according to the alarm signal under the condition that the monitoring host receives the alarm signal sent by the monitoring slave; the alarm signal is generated by the monitoring slave machine under the condition that the monitoring slave machine does not receive an electric signal within a preset time; the monitoring host is arranged at the power supply end of the power transmission line; the monitoring slave is arranged at the power utilization end of the power transmission line; determining a fault waveform from the waveform information; and determining the position information of the fault point on the power transmission line according to the time difference that the fault waveform passes through the two ends of the power transmission line.
In a fifth aspect, the present application also provides a computer-readable storage medium. The computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
under the condition of receiving a control instruction sent by a monitoring host, acquiring waveform information of a power transmission line according to the control instruction; the control instruction is generated by the monitoring host according to the alarm signal under the condition that the monitoring host receives the alarm signal sent by the monitoring slave; the alarm signal is generated by the monitoring slave machine under the condition that the monitoring slave machine does not receive an electric signal within a preset time; the monitoring host is arranged at the power supply end of the power transmission line; the monitoring slave is arranged at the power utilization end of the power transmission line; determining a fault waveform from the waveform information; and determining the position information of the fault point on the power transmission line according to the time difference that the fault waveform passes through the two ends of the power transmission line.
In a sixth aspect, the present application also provides a computer program product. The computer program product comprises a computer program which, when executed by a processor, implements the steps of:
under the condition of receiving a control instruction sent by a monitoring host, acquiring waveform information of a power transmission line according to the control instruction; the control instruction is generated by the monitoring host according to the alarm signal under the condition that the monitoring host receives the alarm signal sent by the monitoring slave; the alarm signal is generated by the monitoring slave machine under the condition that the monitoring slave machine does not receive an electric signal within a preset time; the monitoring host is arranged at the power supply end of the power transmission line; the monitoring slave is arranged at the power utilization end of the power transmission line; determining a fault waveform from the waveform information; and determining the position information of the fault point on the power transmission line according to the time difference that the fault waveform passes through the two ends of the power transmission line.
The fault identification method, system, device, computer equipment, storage medium and computer program product of the power transmission line acquire waveform information of the power transmission line according to a control instruction sent by a monitoring host under the condition that the control instruction is received; the control instruction is generated by the monitoring host according to the alarm signal under the condition that the monitoring host receives the alarm signal sent by the monitoring slave; the alarm signal is generated by the monitoring slave machine under the condition that the monitoring slave machine does not receive an electric signal within a preset time; the monitoring host is arranged at the power supply end of the power transmission line; the monitoring slave is arranged at the power utilization end of the power transmission line; determining a fault waveform from the waveform information; and determining the position information of the fault point on the power transmission line according to the time difference that the fault waveform passes through the two ends of the power transmission line. According to the scheme, under the condition that the monitoring slave machine does not receive an electric signal within a preset time, an alarm signal is generated, the alarm signal is sent to the monitoring host machine, the monitoring host machine receives the alarm signal sent by the monitoring slave machine, a control instruction is generated according to the alarm signal, the control instruction is sent to the central processing unit, the central processing unit receives the control instruction sent by the monitoring host machine, waveform information of the power transmission line is obtained according to the control instruction, a fault waveform is determined from the waveform information, and fault point position information on the power transmission line is determined according to the time difference that the fault waveform passes through two ends of the power transmission line, so that efficiency and accuracy for determining the fault point position information on the power transmission line are improved.
Drawings
Fig. 1 is an application environment diagram of a fault identification method of a power transmission line in one embodiment;
fig. 2 is a flow chart of a fault identification method of a power transmission line in one embodiment;
fig. 3 is an application environment diagram of a fault identification method of a power transmission line in another embodiment;
FIG. 4 is a schematic diagram of connection of a location detection unit in one embodiment;
FIG. 5 is a schematic diagram of the connection of an emergency processing unit in one embodiment;
fig. 6 is a block diagram of a fault recognition device of a power transmission line in one embodiment;
fig. 7 is an internal structural diagram of a computer device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The fault identification method of the power transmission line can be applied to an application environment shown in fig. 1. The application scenario may include: the central processing unit, the monitoring host and the monitoring slave can be in communication connection, and the monitoring host and the monitoring slave can be in communication connection. Specifically, under the condition that the monitoring slave machine does not receive the electric signal within the preset time, generating an alarm signal, and sending the alarm signal to the monitoring host machine; under the condition that the monitoring host receives the alarm signal sent by the monitoring slave, generating a control instruction according to the alarm signal, and sending the control instruction to the central processing unit; under the condition that a control command sent by a monitoring host is received, the central processing unit acquires waveform information of the power transmission line according to the control command, determines a fault waveform from the waveform information, and determines fault point position information on the power transmission line according to the time difference that the fault waveform passes through two ends of the power transmission line. The central processing unit can be, but not limited to, various personal computers, notebook computers, smart phones and tablet computers; the monitoring host may be a host of the monitoring device; the monitoring slave may be a slave of the monitoring device.
In one embodiment, as shown in fig. 2, a fault identification method of a power transmission line is provided, and the method is applied to the central processing unit in fig. 1 for illustration, and includes the following steps:
step S201, under the condition that a control instruction sent by a monitoring host is received, waveform information of a power transmission line is obtained according to the control instruction; the control instruction is generated by the monitoring host computer according to the alarm signal under the condition that the monitoring host computer receives the alarm signal sent by the monitoring slave computer; the alarm signal is generated by the monitoring slave machine under the condition that the monitoring slave machine does not receive the electric signal within the preset time; the monitoring host is arranged at the power supply end of the power transmission line; the monitoring slave is arranged at the power utilization end of the power transmission line.
In this step, the control instruction may be an instruction associated with an alarm signal, and may be an instruction for indicating which monitoring slave does not receive an electrical signal; the waveform information may refer to traveling wave information or traveling wave signals; the alarm signal may be signal information representing an alarm; the preset time may be twice the time for the electrical signal to be transmitted from the monitoring master to the monitoring slave.
Specifically, under the condition that the monitoring slave machine does not receive the electric signal within the preset time, generating an alarm signal, and sending the alarm signal to the monitoring host machine; under the condition that the monitoring host receives the alarm signal sent by the monitoring slave, generating a control instruction according to the alarm signal, and sending the control instruction to the central processing unit; and under the condition that the central processing unit receives the control instruction sent by the monitoring host, acquiring waveform information of the power transmission line according to the control instruction.
Step S202, determining a fault waveform from the waveform information.
In this step, the fault waveform may be a waveform representing a fault.
Specifically, the central processing unit recognizes a failed waveform from the waveform information as a failed waveform.
And step S203, determining the position information of the fault point on the power transmission line according to the time difference that the fault waveform passes through the two ends of the power transmission line.
In the step, two ends of the transmission line can be two end points of a certain section of transmission line; the fault point location information on the power line may refer to a location of a fault point on the power line, for example, a location of the fault point to be identified on the power line.
Specifically, the central processing unit obtains a first time when the fault waveform passes through one end of the power transmission line, and obtains a second time when the fault waveform passes through the other end of the power transmission line, determines a time difference between the first time and the second time, and determines position information of a fault point on the power transmission line according to the time difference and a wave speed of the fault waveform.
In the fault identification method of the power transmission line, under the condition that a control instruction sent by a monitoring host is received, waveform information of the power transmission line is obtained according to the control instruction; the control instruction is generated by the monitoring host computer according to the alarm signal under the condition that the monitoring host computer receives the alarm signal sent by the monitoring slave computer; the alarm signal is generated by the monitoring slave machine under the condition that the monitoring slave machine does not receive the electric signal within the preset time; the monitoring host is arranged at the power supply end of the power transmission line; the monitoring slave is arranged at the power utilization end of the power transmission line; determining a fault waveform from the waveform information; and determining the position information of the fault point on the power transmission line according to the time difference that the fault waveform passes through the two ends of the power transmission line. According to the scheme, under the condition that the monitoring slave machine does not receive an electric signal within a preset time, an alarm signal is generated, the alarm signal is sent to the monitoring host machine, the monitoring host machine receives the alarm signal sent by the monitoring slave machine, a control instruction is generated according to the alarm signal, the control instruction is sent to the central processing unit, the central processing unit receives the control instruction sent by the monitoring host machine, waveform information of the power transmission line is obtained according to the control instruction, a fault waveform is determined from the waveform information, and fault point position information on the power transmission line is determined according to the time difference that the fault waveform passes through two ends of the power transmission line, so that efficiency and accuracy for determining the fault point position information on the power transmission line are improved.
In one embodiment, in step S201, when a control command sent by a monitoring host is received, waveform information of a power transmission line is obtained according to the control command, and specifically includes the following contents: under the condition of receiving a control instruction sent by a monitoring host, acquiring a voltage value and a current value at two ends of a power transmission line; and under the condition that the voltage value meets the preset fault voltage condition and the current value meets the preset fault current condition, acquiring waveform information of the power transmission line according to the control instruction.
In this embodiment, the preset fault current condition may be a preset condition of a fault current interval, or may be a no-current condition; the preset fault voltage condition may be a condition of a preset fault voltage interval or a no-voltage condition.
Specifically, under the condition that a control instruction sent by a monitoring host is received, a central processing unit acquires a voltage value and a current value at two ends of a power transmission line; if the voltage value meets the preset fault voltage condition and the current value meets the preset fault current condition, acquiring waveform information of the power transmission line according to the control instruction; if the voltage value does not meet the preset fault voltage condition or the current value does not meet the preset fault current condition, judging that the power transmission line normally operates and no fault exists.
According to the technical scheme, under the condition that the control instruction sent by the monitoring host is received, whether the voltage value and the current value meet the preset fault voltage condition and the preset fault current condition or not is judged, and therefore accuracy of fault identification of the power transmission line is improved.
In one embodiment, in step S201, when a control command sent by a monitoring host is received, waveform information of a power transmission line is obtained according to the control command, and specifically includes the following contents: under the condition that a control command sent by a monitoring host is received, determining a power transmission line corresponding to the control command from a plurality of power transmission lines; waveform information of the power transmission line corresponding to the control instruction is obtained.
In this embodiment, different power transmission lines may correspond to different monitoring slaves.
Specifically, under the condition that a control instruction sent by a monitoring host is received, the central processing unit determines a monitoring slave machine sending an alarm signal according to the control instruction, and the monitoring slave machine is used as a target monitoring slave machine, and determines a power transmission line corresponding to the target monitoring slave machine from a plurality of power transmission lines and is used as a power transmission line corresponding to the control instruction; waveform information of the power transmission line corresponding to the control instruction is obtained.
According to the technical scheme, the target power transmission line is determined from the plurality of power transmission lines, and then the waveform information of the target power transmission line is acquired, so that the accuracy of acquiring the waveform information is improved, and the accuracy of determining the fault point position information on the power transmission line is improved.
In one embodiment, in step S202, a fault waveform is determined from waveform information, which specifically includes the following: determining fault waveform characteristic information according to the historical fault waveform; based on the fault waveform characteristic information, a fault waveform is identified from the waveform information.
In this embodiment, the historical fault waveform may be historical data of the fault waveform; the fault waveform characteristic information may be a characteristic of the fault waveform.
Specifically, the central processing unit performs feature extraction on the historical fault waveform to determine fault waveform feature information; from the waveform information, a waveform matching the fault waveform characteristic information is identified as a fault waveform.
According to the technical scheme, the fault waveform is identified according to the fault waveform characteristic information, so that the fault waveform can be determined more quickly and accurately, and the efficiency and accuracy of determining the fault point position information on the power transmission line can be improved.
In one embodiment, in step S203, the fault point location information on the power transmission line is determined according to the time difference that the fault waveform passes through the two ends of the power transmission line, and specifically includes the following contents: acquiring first time from a fault waveform to a first measuring point of the power transmission line and acquiring second time from the fault waveform to a second measuring point of the power transmission line; the first measuring point and the second measuring point are respectively arranged at two ends of the power transmission line; determining the time difference of the fault waveform passing through the two ends of the power transmission line according to the first time and the second time; and determining the position information of the fault point on the power transmission line according to the time difference and the speed information of the fault waveform.
Specifically, the central processing unit acquires a first time from a fault waveform to a first measurement point of the power transmission line and acquires a second time from the fault waveform to a second measurement point of the power transmission line; subtracting the first time from the second time to determine the time difference of the fault waveform passing through the two ends of the power transmission line; and determining the position information of the fault point on the power transmission line according to the time difference, the speed information of the fault waveform, the position of the first measuring point and the position of the second measuring point.
According to the technical scheme of the embodiment, the stored first time and second time are determined, and then the fault point position information on the power transmission line is determined according to the time difference between the first time and the second time and the speed information of the fault waveform, so that the efficiency and the accuracy for determining the fault point position information on the power transmission line are improved.
In one embodiment, the step S203 further includes a step of sending maintenance information after determining the location information of the fault point on the power transmission line according to the time difference that the fault waveform passes through the two ends of the power transmission line, and specifically includes the following steps: generating maintenance information according to the position information of the fault point on the power transmission line; sending maintenance information to a maintenance terminal; the repair information is used to assist in repairing the failure point.
In this embodiment, the maintenance terminal may be a terminal corresponding to a maintenance person.
Specifically, the central processing unit generates maintenance information according to the position information of the fault point on the power transmission line; and sending maintenance information to a maintenance terminal so as to assist maintenance personnel to maintain the fault point.
According to the technical scheme, the maintenance information is generated according to the position information of the fault point and is sent to the maintenance terminal, so that the real-time performance and the accuracy of maintenance treatment on the fault point are improved.
In one embodiment, a fault identification system for a power transmission line is provided, and referring to fig. 1, the fault identification system for a power transmission line includes: the system comprises a central processing unit, a monitoring host arranged at a power supply end of a power transmission line and a monitoring slave arranged at a power utilization end of the power transmission line; the monitoring host is respectively connected with the monitoring slave and the central processing unit;
The monitoring slave is used for generating an alarm signal and sending the alarm signal to the monitoring host under the condition that the monitoring slave does not receive the electric signal within a preset time; the monitoring host is used for generating a control instruction according to the alarm signal under the condition that the alarm signal sent by the monitoring slave is received, and sending the control instruction to the central processing unit; the central processing unit is used for acquiring waveform information of the power transmission line according to the control command under the condition that the control command sent by the monitoring host is received, determining a fault waveform from the waveform information, and determining fault point position information on the power transmission line according to the time difference that the fault waveform passes through two ends of the power transmission line.
Specifically, under the condition that the monitoring slave machine does not receive the electric signal within the preset time, generating an alarm signal, and sending the alarm signal to the monitoring host machine; under the condition that the monitoring host receives the alarm signal sent by the monitoring slave, generating a control instruction according to the alarm signal, and sending the control instruction to the central processing unit; under the condition that a control command sent by a monitoring host is received, the central processing unit acquires waveform information of the power transmission line according to the control command, determines a fault waveform from the waveform information, and determines fault point position information on the power transmission line according to the time difference that the fault waveform passes through two ends of the power transmission line.
In the fault identification system of the power transmission line, under the condition that the monitoring slave machine does not receive the electric signal within the preset time, the monitoring slave machine generates an alarm signal, the alarm signal is sent to the monitoring host machine, the monitoring host machine receives the alarm signal sent by the monitoring slave machine, generates a control instruction according to the alarm signal, sends the control instruction to the central processing unit, the central processing unit receives the control instruction sent by the monitoring host machine, acquires waveform information of the power transmission line according to the control instruction, determines a fault waveform from the waveform information, determines fault point position information on the power transmission line according to the time difference that the fault waveform passes through two ends of the power transmission line, and therefore efficiency and accuracy of determining the fault point position information on the power transmission line are improved.
The following describes a fault identification method for a power transmission line provided by the present application in an embodiment, where the method is applied to a central processing unit for illustration, and the main steps include:
the method comprises the steps that firstly, under the condition that a control instruction sent by a monitoring host is received, a central processing unit determines a power transmission line corresponding to the control instruction from a plurality of power transmission lines; acquiring voltage values and current values of two ends of the power transmission line corresponding to the control instruction; and under the condition that the voltage value meets the preset fault voltage condition and the current value meets the preset fault current condition, acquiring waveform information of the power transmission line corresponding to the control instruction according to the control instruction.
The control instruction is generated by the monitoring host according to the alarm signal under the condition that the monitoring host receives the alarm signal sent by the monitoring slave; the alarm signal is generated by the monitoring slave machine under the condition that the monitoring slave machine does not receive the electric signal within the preset time; the monitoring host is arranged at the power supply end of the power transmission line; the monitoring slave is arranged at the power utilization end of the power transmission line.
Step two, the central processing unit determines fault waveform characteristic information according to the historical fault waveform; based on the fault waveform characteristic information, a fault waveform is identified from the waveform information.
The third step, the central processing unit obtains the first time from the fault waveform to the first measuring point of the power transmission line and obtains the second time from the fault waveform to the second measuring point of the power transmission line; determining the time difference of the fault waveform passing through the two ends of the power transmission line according to the first time and the second time; and determining the position information of the fault point on the power transmission line according to the time difference and the speed information of the fault waveform.
The first measuring point and the second measuring point are respectively arranged at two ends of the power transmission line.
Fourthly, the central processing unit generates maintenance information according to the position information of the fault point on the power transmission line; and sending the maintenance information to a maintenance terminal.
Wherein the maintenance information is used to assist in maintaining the failure point.
According to the technical scheme, under the condition that the monitoring slave machine does not receive an electric signal within the preset time, an alarm signal is generated, the alarm signal is sent to the monitoring host machine, the monitoring host machine receives the alarm signal sent by the monitoring slave machine, generates a control instruction according to the alarm signal, sends the control instruction to the central processing unit, the central processing unit receives the control instruction sent by the monitoring host machine, acquires waveform information of the power transmission line according to the control instruction, determines a fault waveform from the waveform information, and determines fault point position information on the power transmission line according to the time difference that the fault waveform passes through two ends of the power transmission line, so that efficiency and accuracy of determining the fault point position information on the power transmission line are improved.
The following describes a fault identification system for a power transmission line provided by the present application with an application example, and the present application example is described by way of example with reference to fig. 3, 4, and 5, where the fault identification system for a power transmission line includes: the monitoring system comprises a monitoring host computer arranged at a power supply end of a power transmission line, a monitoring slave computer arranged at a power utilization end of the power transmission line and a central processing unit arranged at the power supply end of the power transmission line and connected with the monitoring host computer in a signal manner, wherein the monitoring host computer is connected with the monitoring slave computer in a network manner;
The monitoring slave machine does not receive the electric signal within a preset time, and sends out an alarm signal; the monitoring host receives the alarm signal through the network, alarms when the monitoring host receives the alarm signal, and sends a control instruction to the central processing unit;
the central processing unit sends traveling wave signals to the power transmission line according to the control instruction, and calculates the distance covered by the traveling wave signals according to the sent traveling wave signals and the reflected traveling wave signals; the predetermined time is twice the time for the transmission of the electrical signal from the monitoring host to the monitoring slave;
the device also comprises a positioning detection unit, wherein an electric signal of a voltage sensing unit of the power transmission line arranged in the positioning detection unit is converted and transmitted to a current sensing unit, the output end of the current sensing unit is connected with a micro processing unit, and the output end of the micro processing unit is connected with a communication unit;
if the monitoring host receives the alarm signal and the voltage sensing unit and the current sensing unit acquire the voltage and the current, the monitoring host does not send a control instruction;
if the monitoring host receives the alarm wave signal within the preset time and the voltage sensing unit and the current sensing unit do not acquire the voltage and the current, the monitoring host sends a control instruction to the central processing unit;
The system also comprises an emergency processing unit connected with the output end of the monitoring host through signals.
The emergency processing unit is connected with a main control singlechip in a signal manner, the main control singlechip is respectively connected with the excess resistance calculation unit and the fault distance calculation unit, and the main control singlechip performs level output driving on an outlet driving part according to the condition that a high-resistance grounding fault occurs on a power transmission line and the condition that the tail end of the line is faulty, closes an outlet relay, switches on a tripping circuit, trips a fault line breaker and cuts off the fault; the relay module is used as an auxiliary contact of an outlet relay of an outlet loop of the microcomputer protection device in the outlet driving part, the output level of the main control singlechip triggers the relay module to act, the auxiliary contact of the outlet relay is closed, the outlet loop of the micro processing unit is connected, the tripping coil of the circuit breaker acts, and the fault is removed; the relay module is an optocoupler relay module.
The monitoring host comprises a first controller, a first communication module, an alarm signal receiving module, an alarm and a linear amplifier; the first controller is respectively connected with the first communication module, the alarm and the linear amplifier; the first communication module is used for realizing network communication between the first controller and the monitoring slave; the alarm signal receiving module is used for receiving an alarm signal transmitted by the monitoring slave machine and transmitted by the first communication module; the linear amplifier is used for amplifying the alarm signal and then sending the alarm signal to the first controller.
The central processing unit comprises a data storage unit and a wireless communication unit; the data storage unit is arranged on the power transmission line and used for collecting traveling wave information of the power transmission line, is connected with the data processing device through the data collecting device and used for receiving the traveling wave information and carrying out sampling processing on the traveling wave information to obtain waveform information; the wireless communication unit is connected with the data storage unit and is used for receiving the waveform information, judging whether the waveform information belongs to a fault waveform according to the preset fault waveform characteristics, if so, recording the time of the fault waveform passing through the data storage unit, and calculating and obtaining the position of fault generation according to the time of the fault waveform passing through the data storage unit.
The wireless communication unit comprises a wireless transmitting module and a wireless receiving intelligent controller module, the wireless transmitting module is connected with the wireless receiving intelligent controller module through wireless communication, the wireless receiving intelligent controller module is arranged in the circuit main control box, the wireless transmitting module is worn on a user, the wireless receiving intelligent controller module transmits signals to the central processing unit after receiving signals transmitted by the wireless transmitting module, and the central processing unit controls the circuit to be conducted through an electric loop; when the wireless receiving intelligent controller module cannot receive the signal transmitted by the wireless transmitting module, the central processing unit controls the circuit to be disconnected by the electric loop.
The monitoring host output end is in signal connection with the communication unit, and the communication unit comprises a positioning monitoring end, a transceiver, an alarm, a PLC (programmable logic controller), a memory, a display and an Ethernet interface module; the positioning monitoring end is in communication connection with the transceiver; the transceiver is in communication connection with the PLC controller; the PLC controller is respectively connected with the alarm, the memory and the display in a communication way; the PLC is connected with the monitoring host through the Ethernet interface module; the cloud server of the monitoring host is respectively connected with a web end (webpage end) and a mobile end in a communication mode.
The positioning monitoring end comprises a GPS (satellite navigation system) positioning unit, a voltage sensor, a current sensor, a micro processing unit and a communication module; the voltage sensor, the GPS positioning unit and the current sensor are all connected with the communication module through the micro-processing unit, the communication module is in communication connection with the transceiver, and a plurality of positioning monitoring ends are arranged; the mobile terminals are arranged in a plurality, and the mobile terminals are selected as mobile phone terminals; the alarm is selected as an audible and visual alarm.
Wherein the data storage unit includes: the acquisition coil is sleeved on the transmission line and used for acquiring the current of the transmission line; the power supply module comprises a voltage converter, a voltage stabilizing module and an energy storage battery, wherein the input end of the voltage converter is connected with the power transmission line, the output end of the voltage converter is connected with the input end of the voltage stabilizing module, and the output end of the voltage stabilizing module is connected with the monitoring host, the central processing unit, the monitoring slave and the energy storage battery respectively.
For example, the main purpose of fault wave-recording and distance-measuring is to locate the fault location by the current wave-recording value, and a fault wave-recording and distance-measuring algorithm based on the least square method is provided. Assuming that the positioning detection equipment of the power transmission line comprises B, D two ends, the fault is generated at the c position of the B end, and symmetrical component conversion and Fourier transformation are sequentially carried out on the voltage and current signals, so that the following circuit equation is obtained:
wherein k is a positive sequence bit and a negative sequence bit; u (U) Bc 、U Dc Sequentially from two ends of B, D to the fault point; u (U) Bk 、U Dk 、I Bk 、I Dk The sequence voltage and current at both ends of B, D in sequence; phi (phi) k 、R k The propagation constant and the wave impedance of the device are in turn.
Setting the phase angle deviation of the data at two ends relative to the fundamental wave phasor as gamma, and then the correlation between the voltage sequence components of the fault point is as follows: u (U) Bk= U Dk e γ （2）。
Where e represents the component index.
The following equation set is created by using the positive and negative sequence circuit equations after the fault and redundant data before the fault:
in U B 、U D 、I B 、I D Which in turn is the positive sequence component of the voltage and current at the end of the pre-fault device B, D.
For the convenience of calculation, phi in formula (3) 1 、R k Conversion to [0,1 ]]5 deviation parameters g of interval 0 、g 1 、g 2 、g 3 、g 4 The method comprises the following steps of:
in the method, in the process of the invention,
、/>
is the device propagation coefficient; w (W) 1 、W 2 Is the real imaginary part of the real value of the wave impedance.
The least square method can restrict the error square sum to obtain an optimal solution in a state that the true value is not known, and then the least square method is used for solving the two ends of the equipment to finish the calculation of fault recording data so as to achieve the purpose of accurately positioning fault points.
Counting recording data of the first end and the last end of positioning detection equipment of the power transmission line, and marking as: e=h×x (5). Wherein E represents a head-end electrical quantity matrix; h is the terminal electrical quantity matrix; x is the electrical quantity unsynchronized angle of the two ends. The relation can be obtained by using the least square method: x= (H) t H） -1 H t E (6), wherein t represents the number of iterations. Fitting x as a known quantity calculation error matrix P: p=e-h×x (7). Correcting an original head-end electrical quantity matrix E to obtain: e' =e-P (8). And (3) evaluating whether the matrix P meets the error requirement, and if not, acquiring a brand new current matrix by using the formula (8). The above operation is repeatedly performed until the matrix P meets the requirement. Through the steps (6) - (8), the time synchronization of the fault recording data of the transformer substation is completed by using the least square method, the method is not influenced by a network topology framework, and is convenient for technicians to debug and maintain, and has extremely high convenience. After synchronizing fault recording data time, updatingVoltage and current at two ends of positioning detection equipment of current transmission line:
wherein, l represents the length of the device; i f The fault point current value; s is S f Is the transition resistance.
Excluding I' in formula (9) f 、S f The real-time voltage and current values at two ends of the circuit are obtained, operation data are provided for fault location, and calculation accuracy is guaranteed. Finally, defining a fault point positioning calculation formula as:
Wherein sigma is wave velocity; t is t 1 、t 2 Is the time that the current wave reaches the bus from both ends of the circuit. And (3) completing fault recording data calculation through a least square method power transmission line fault recording ranging algorithm, and achieving accurate fault point positioning. Wherein the unexplained symbol or letter may be a settable parameter.
According to the technical scheme of the application example, the fault identification system (also called as an intelligent decision system for power transmission line faults) of the power transmission line is utilized, firstly, the acquired traveling wave information is processed through a data storage unit arranged on the power transmission line to obtain waveform information, finally, whether the waveform information belongs to a fault waveform is judged through a central processing device according to preset fault waveform characteristics, when the waveform information belongs to the fault waveform, the time of the fault waveform passing through data acquisition is recorded, and the position of fault generation is obtained according to the time calculation of the fault waveform passing through time; secondly, whether the power transmission line fails or not can be judged through the mutual coordination of the monitoring host computer and the monitoring slave computer, when the power transmission line fails, the monitoring host computer sends a first control instruction to the central processing unit, and the central processing unit finishes positioning of a failure point of the power transmission line according to the first control instruction; thirdly, under the action of a voltage sensor and a current sensor, monitoring a section of power transmission line, sending data to a display for display in real time through a communication module, a transceiver and a PLC controller, and when the data is abnormal, sending fault information to a mobile terminal through a central processing unit while the PLC controller starts an alarm, and timely notifying a worker of the fault information, so that maintenance and search are timely performed; the GPS positioning unit is used for positioning the position of the positioning monitoring end, so that the fault point can be conveniently searched and maintained by a worker.
It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
Based on the same inventive concept, the embodiment of the application also provides a fault recognition device of the power transmission line for realizing the fault recognition method of the power transmission line. The implementation scheme of the device for solving the problem is similar to that described in the above method, so the specific limitation in the embodiments of the fault identification device for one or more power transmission lines provided below may refer to the limitation of the fault identification method for the power transmission line hereinabove, and will not be repeated herein.
In one embodiment, as shown in fig. 6, there is provided a fault identification device for a power transmission line, where the device 600 may include:
the waveform obtaining module 601 is configured to obtain waveform information of the power transmission line according to the control instruction when receiving the control instruction sent by the monitoring host; the control instruction is generated by the monitoring host computer according to the alarm signal under the condition that the monitoring host computer receives the alarm signal sent by the monitoring slave computer; the alarm signal is generated by the monitoring slave machine under the condition that the monitoring slave machine does not receive the electric signal within the preset time; the monitoring host is arranged at the power supply end of the power transmission line; the monitoring slave is arranged at the power utilization end of the power transmission line;
a waveform determining module 602, configured to determine a fault waveform from the waveform information;
the position determining module 603 is configured to determine position information of a fault point on the power transmission line according to a time difference that the fault waveform passes through two ends of the power transmission line.
In one embodiment, the waveform obtaining module 601 is further configured to obtain a voltage value and a current value at two ends of the power transmission line when receiving a control instruction sent by the monitoring host; and under the condition that the voltage value meets the preset fault voltage condition and the current value meets the preset fault current condition, acquiring waveform information of the power transmission line according to the control instruction.
In one embodiment, the waveform obtaining module 601 is further configured to determine, when receiving a control instruction sent by the monitoring host, a power transmission line corresponding to the control instruction from a plurality of power transmission lines; waveform information of the power transmission line corresponding to the control instruction is obtained.
In one embodiment, the waveform determining module 602 is further configured to determine fault waveform characteristic information according to the historical fault waveform; based on the fault waveform characteristic information, a fault waveform is identified from the waveform information.
In one embodiment, the location determining module 603 is further configured to obtain a first time from the fault waveform to a first measurement point of the power transmission line, and obtain a second time from the fault waveform to a second measurement point of the power transmission line; the first measuring point and the second measuring point are respectively arranged at two ends of the power transmission line; determining the time difference of the fault waveform passing through the two ends of the power transmission line according to the first time and the second time; and determining the position information of the fault point on the power transmission line according to the time difference and the speed information of the fault waveform.
In one embodiment, the apparatus 600 further comprises: the information sending module is used for generating maintenance information according to the position information of the fault point on the power transmission line; sending maintenance information to a maintenance terminal; the repair information is used to assist in repairing the failure point.
All or part of each module in the fault recognition device of the power transmission line can be realized by software, hardware and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a computer device is provided, which may be a terminal, and the internal structure of which may be as shown in fig. 7. The computer device includes a processor, a memory, an input/output interface, a communication interface, a display unit, and an input means. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input/output interface. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input/output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless mode can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The computer program, when executed by a processor, implements a method for fault identification of a transmission line. The display unit of the computer device is used for forming a visual picture, and can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, can also be a key, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in fig. 7 is merely a block diagram of some of the structures associated with the present application and is not limiting of the computer device to which the present application may be applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In an embodiment, there is also provided a computer device comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the steps of the method embodiments described above when the computer program is executed.
In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when executed by a processor, carries out the steps of the method embodiments described above.
In an embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the steps of the method embodiments described above.
It should be noted that, the user information (including, but not limited to, user equipment information, user personal information, etc.) and the data (including, but not limited to, data for analysis, stored data, presented data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party, and the collection, use and processing of the related data are required to comply with the related laws and regulations and standards of the related countries and regions.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the various embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as Static Random access memory (Static Random access memory AccessMemory, SRAM) or dynamic Random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the various embodiments provided herein may include at least one of relational databases and non-relational databases. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic units, quantum computing-based data processing logic units, etc., without being limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.
Claims (10)
1. A method for identifying a fault in a power transmission line, the method comprising:
under the condition of receiving a control instruction sent by a monitoring host, acquiring waveform information of a power transmission line according to the control instruction; the control instruction is generated by the monitoring host according to the alarm signal under the condition that the monitoring host receives the alarm signal sent by the monitoring slave; the alarm signal is generated by the monitoring slave machine under the condition that the monitoring slave machine does not receive an electric signal within a preset time; the monitoring host is arranged at the power supply end of the power transmission line; the monitoring slave is arranged at the power utilization end of the power transmission line;
Determining a fault waveform from the waveform information;
and determining the position information of the fault point on the power transmission line according to the time difference that the fault waveform passes through the two ends of the power transmission line.
2. The method according to claim 1, wherein the obtaining waveform information of the power transmission line according to the control command when the control command sent by the monitoring host is received includes:
under the condition of receiving a control instruction sent by a monitoring host, acquiring a voltage value and a current value at two ends of the power transmission line;
and under the condition that the voltage value meets a preset fault voltage condition and the current value meets a preset fault current condition, acquiring waveform information of the power transmission line according to the control instruction.
3. The method according to claim 1, wherein the obtaining waveform information of the power transmission line according to the control command when the control command sent by the monitoring host is received includes:
under the condition that a control command sent by a monitoring host is received, determining a power transmission line corresponding to the control command from a plurality of power transmission lines;
and acquiring waveform information of the power transmission line corresponding to the control instruction.
4. The method of claim 1, wherein determining a fault waveform from the waveform information comprises:
determining fault waveform characteristic information according to the historical fault waveform;
and identifying a fault waveform from the waveform information according to the fault waveform characteristic information.
5. The method of claim 1, wherein determining fault point location information on the power line based on a time difference that the fault waveform passes across the power line comprises:
acquiring a first time from the fault waveform to a first measurement point of the power transmission line and a second time from the fault waveform to a second measurement point of the power transmission line; the first measuring point and the second measuring point are respectively arranged at two ends of the power transmission line;
determining the time difference of the fault waveform passing through the two ends of the power transmission line according to the first time and the second time;
and determining the position information of the fault point on the power transmission line according to the time difference and the speed information of the fault waveform.
6. The method of claim 1, further comprising, after determining fault point location information on the power line based on a time difference that the fault waveform passes across the power line:
Generating maintenance information according to the fault point position information on the power transmission line;
the maintenance information is sent to a maintenance terminal; the maintenance information is used for assisting in maintaining the fault point.
7. A fault identification system for a power transmission line, the system comprising: the system comprises a central processing unit, a monitoring host arranged at a power supply end of a power transmission line and a monitoring slave arranged at a power utilization end of the power transmission line; the monitoring host is respectively connected with the monitoring slave and the central processing unit;
the monitoring slave is used for generating an alarm signal and sending the alarm signal to the monitoring host under the condition that the electric signal is not received within preset time;
the monitoring host is used for generating a control instruction according to the alarm signal under the condition that the alarm signal sent by the monitoring slave is received, and sending the control instruction to the central processing unit;
the central processing unit is used for acquiring waveform information of the power transmission line according to the control command under the condition that the control command sent by the monitoring host is received, determining a fault waveform from the waveform information, and determining fault point position information on the power transmission line according to the time difference that the fault waveform passes through two ends of the power transmission line.
8. A fault identification device for a power transmission line, the device comprising:
the waveform acquisition module is used for acquiring waveform information of the power transmission line according to the control instruction under the condition that the control instruction sent by the monitoring host is received; the control instruction is generated by the monitoring host according to the alarm signal under the condition that the monitoring host receives the alarm signal sent by the monitoring slave; the alarm signal is generated by the monitoring slave machine under the condition that the monitoring slave machine does not receive an electric signal within a preset time; the monitoring host is arranged at the power supply end of the power transmission line; the monitoring slave is arranged at the power utilization end of the power transmission line;
the waveform determining module is used for determining a fault waveform from the waveform information;
and the position determining module is used for determining the position information of the fault point on the power transmission line according to the time difference that the fault waveform passes through the two ends of the power transmission line.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 6 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
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