CN111693821A - Testing method and device for traveling wave fault location device of cable-overhead mixed line - Google Patents
Testing method and device for traveling wave fault location device of cable-overhead mixed line Download PDFInfo
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- CN111693821A CN111693821A CN202010568711.4A CN202010568711A CN111693821A CN 111693821 A CN111693821 A CN 111693821A CN 202010568711 A CN202010568711 A CN 202010568711A CN 111693821 A CN111693821 A CN 111693821A
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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
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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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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- 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
Abstract
The invention discloses a test method of a traveling wave fault location device of a cable-overhead mixed line, which comprises the steps of establishing a simulation model of a regional power grid containing the cable-overhead mixed line on a detection platform provided with the traveling wave fault location device to be tested, carrying out fault simulation in the simulation model, recording a fault location result of the traveling wave fault location device to be tested after fault simulation, finally comparing the fault location result with an actual fault distance of the fault simulation, obtaining a test result according to the comparison result and preset requirements on the traveling wave fault location device to be tested, realizing the test of the traveling wave fault location capability of the traveling wave fault location device to be tested on the cable-overhead mixed line, and being beneficial to popularization of application of the traveling wave fault location device on the cable-overhead mixed line. The invention also discloses a testing device, testing equipment and a computer readable storage medium of the cable-overhead mixed line traveling wave fault location device, and the testing device, the testing equipment and the computer readable storage medium have the beneficial effects.
Description
Technical Field
The invention relates to the technical field of power system protection, in particular to a test method, a test device, test equipment and a computer readable storage medium for a cable-overhead mixed line traveling wave fault location device.
Background
When a power system fails, the traveling wave theory indicates that the traveling wave of the fault can be transmitted to a far place from a fault point. According to the transmission characteristics of the fault traveling wave, the traveling wave fault location device can quickly and accurately locate the fault location after the fault occurs. The power cable is generally deeply buried underground, has the advantages of small occupied area, stable performance, difficulty in failure and the like, and can bear the power transmission task under special situations (such as large cities which are not suitable for overhead lines); the overhead line has irreplaceable advantages of convenient maintenance, relatively low manufacturing cost and the like, so the cable-overhead line mixed line combining the advantages of the overhead line and the overhead line is more and more put into construction and operation.
For a single transmission line, the high-frequency component of the traveling wave can be attenuated by the resistance of the line, and the wave head identification of the traveling wave fault location device is not facilitated; and when a high-resistance earth fault occurs, the fault traveling wave characteristics are less obvious. And because the wave impedance of the cable-overhead mixed line at the joint of the overhead line and the cable section is discontinuous, the wave can be refracted and reflected, so that fault traveling wave heads received by the two-end distance measuring devices are further attenuated, and the difficulty in identifying the traveling wave heads is increased. At present, the traveling wave distance measuring device of each manufacturer is widely applied to single line traveling wave fault distance measurement, and application and detection research of the traveling wave distance measuring device in a cable-overhead mixed line are lacked.
Disclosure of Invention
The invention aims to provide a test method, a test device, test equipment and a computer readable storage medium for a cable-overhead mixed line traveling wave fault location device, which are used for testing the capability of the traveling wave fault location device in the cable-overhead mixed line to carry out traveling wave fault detection and are beneficial to popularization of the traveling wave fault location device in the application of the cable-overhead mixed line.
In order to solve the technical problem, the invention provides a test method of a traveling wave fault location device of a cable-overhead mixed line, which comprises the following steps:
establishing a simulation model of a regional power grid comprising a cable-overhead mixed line on a detection platform provided with a fault traveling wave distance measuring device to be detected;
carrying out fault simulation in the simulation model, and recording a fault location result of the fault traveling wave location device to be tested after the fault simulation;
and comparing the fault distance measurement result with the actual fault distance of the fault simulation, and obtaining a test result of the fault traveling wave distance measurement device to be measured according to the comparison result and the preset requirement on the fault traveling wave distance measurement device to be measured.
Optionally, the simulation model is specifically an electromagnetic transient model.
Optionally, the fault simulation is performed in the simulation model, specifically:
and performing fault simulation of a plurality of fault positions and fault simulation of a plurality of fault types in the simulation model.
Optionally, the fault location specifically includes a head end, a midpoint, a tail end, and an out-of-zone bus of each type of line.
Optionally, the fault types specifically include a single-phase ground fault, a phase-to-phase fault, a three-phase ground fault, and a jumper fault under transition resistances of multiple sizes.
Optionally, the comparing the fault location result with the actual fault distance of the fault simulation, and obtaining the test result of the fault traveling wave location device to be tested according to the comparison result and the preset requirement on the fault traveling wave location device to be tested specifically include:
comparing the fault location result of the fault traveling wave location device to be tested in each fault simulation with the corresponding actual fault distance to obtain a plurality of comparison results;
calculating each comparison result according to a preset mode to obtain a final comparison result of the fault traveling wave distance measuring device to be measured;
and obtaining a test result of the fault traveling wave distance measuring device to be measured according to the final comparison result and the preset requirement of the fault traveling wave distance measuring device to be measured.
Optionally, the detection platform specifically includes: the system comprises a PSCAD (power system computer aided design) offline simulation platform for carrying the simulation model, a traveling wave distance measurement calibrator connected with the PSCAD offline simulation platform, and a to-be-detected fault traveling wave distance measurement device connected with the traveling wave distance measurement calibrator.
In order to solve the above technical problem, the present invention further provides a measurement device for a cable-overhead hybrid line traveling wave fault location device, comprising:
the modeling unit is used for establishing a simulation model of a regional power grid comprising a cable-overhead mixed line on a detection platform provided with the fault traveling wave distance measuring device to be detected;
the simulation unit is used for carrying out fault simulation in the simulation model and recording a fault location result of the fault traveling wave location device to be tested after the fault simulation;
and the checking unit is used for comparing the fault distance measurement result with the actual fault distance of the fault simulation, and obtaining the test result of the fault traveling wave distance measurement device to be measured according to the comparison result and the preset requirement on the fault traveling wave distance measurement device to be measured.
In order to solve the above technical problem, the present invention further provides a testing apparatus for a cable-overhead hybrid line traveling wave fault location device, comprising:
a memory for storing instructions, the instructions comprising the steps of any one of the above methods for testing a cable-overhead hybrid line traveling wave fault location device;
a processor to execute the instructions.
To solve the above technical problem, the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the method for testing a traveling wave fault location device for a cable-overhead hybrid line according to any one of the above.
According to the test method of the cable-aerial hybrid line traveling wave fault location device, the simulation model of the regional power grid comprising the cable-aerial hybrid line is established on the detection platform provided with the fault traveling wave location device to be tested, fault simulation is carried out in the simulation model, the fault location result of the fault traveling wave location device to be tested after fault simulation is recorded, finally the fault location result is compared with the actual fault distance of the fault simulation, the test result of the fault traveling wave location device to be tested is obtained according to the comparison result and the preset requirement of the fault traveling wave location device to be tested, the fault traveling wave location capability test of the fault traveling wave location device to be tested on the cable-aerial hybrid line is realized, and the popularization of the application of the traveling wave location device on the cable-aerial hybrid line is facilitated. The invention also provides a testing device, testing equipment and a computer readable storage medium of the cable-overhead mixed line traveling wave fault location device, which have the beneficial effects and are not described herein again.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a flowchart of a method for testing a cable-overhead hybrid line traveling wave fault location apparatus according to an embodiment of the present invention;
fig. 2 is a flowchart of an embodiment of step S103 in fig. 1 according to the present invention;
fig. 3 is a schematic structural diagram of a testing device of a cable-overhead hybrid line traveling wave fault location device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a testing device of a cable-overhead hybrid line traveling wave fault location apparatus according to an embodiment of the present invention.
Detailed Description
The core of the invention is to provide a test method, a test device, test equipment and a computer readable storage medium for the cable-overhead mixed line traveling wave fault location device, which are used for testing the traveling wave fault detection capability of the traveling wave fault location device on the cable-overhead mixed line and are beneficial to popularization of the traveling wave fault location device in the application of the cable-overhead mixed line.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
Fig. 1 is a flowchart of a method for testing a cable-overhead hybrid line traveling wave fault location device according to an embodiment of the present invention.
As shown in fig. 1, a method for testing a traveling wave fault location device of a cable-overhead hybrid line according to an embodiment of the present invention includes:
s101: and establishing a simulation model of the regional power grid comprising the cable-overhead mixed line on a detection platform provided with the fault traveling wave distance measuring device to be detected.
In specific implementation, a detection platform is set up in advance, and the detection platform may include: the PSCAD off-line simulation platform is used for carrying a simulation model, the traveling wave distance measurement calibrator is connected with the PSCAD off-line simulation platform, and the fault traveling wave distance measurement device to be measured is connected with the traveling wave distance measurement calibrator, wherein the PSCAD off-line simulation platform is further used for operating traveling wave distance measurement calibrator control software to send a Comtrade waveform file to the (PH02) traveling wave distance measurement calibrator, the traveling wave distance measurement calibrator transmits a current signal to the fault traveling wave distance measurement device to be measured according to the Comtrade waveform file, and the fault traveling wave distance measurement device to be measured displays a fault distance measurement result on a display terminal. The detection platform may also include a high precision power amplifier.
The installation method of the fault traveling wave distance measuring device to be measured refers to the installation method of the fault traveling wave distance measuring device in practical application. In practical application, the fault traveling wave distance measuring device is divided into a single-end distance measuring device and a double-end distance measuring device, and double-end distance measuring is mainly adopted. The single-end distance measurement is to install a fault traveling wave distance measurement device at one end of the cable-overhead mixed line and is used for detecting the distance between the fault position on the cable-overhead mixed line and the fault traveling wave distance measurement device. The double-end ranging is that fault traveling wave ranging devices are arranged at two ends of a cable-overhead mixed line, the two fault traveling wave ranging devices are connected through optical fibers, and the two fault traveling wave ranging devices obtain a final fault ranging result through a fault ranging result of the two fault traveling wave ranging devices and a fault ranging result of the other fault traveling wave ranging device, so that the fault ranging method is more accurate and is a universal fault ranging method in the field. In the embodiment of the invention, a double-end distance measurement method is preferably adopted, and because the simulation model is carried on the PSCAD offline simulation platform, the two fault traveling wave distance measurement devices to be measured only need to be connected by adopting an optical port.
In order to accurately simulate the traveling wave fault of the cable-overhead mixed line, the established simulation model adopts an electromagnetic transient model, and the electromagnetic transient model of the regional power grid comprising the cable-overhead mixed line specifically comprises equivalent networks of two parts of the cable-overhead mixed line and devices at two ends of the mixed line.
After the detection platform is built, the fault traveling wave distance measuring device to be measured needs to be configured, parameters of the cable-overhead mixed line are input into the fault traveling wave distance measuring device to be measured according to the built simulation model, and the parameter types comprise the length of a cable section of the cable-overhead mixed line and the traveling wave speed, and the length of an overhead line section of the cable-overhead mixed line and the traveling wave speed.
S102: and carrying out fault simulation in the simulation model, and recording a fault location result of the fault traveling wave location device to be tested after fault simulation.
And selecting a plurality of positions on a simulation model established by the PSCAD offline simulation platform to simulate the traveling wave fault, and recording the fault location result of the fault traveling wave location device to be tested after the fault simulation. If the total length of the cable-overhead hybrid line in the simulation model is assumed to be 100km, fault simulation can be performed at 30km, 60km and 90km respectively to obtain three fault location results output by the fault traveling wave location device to be tested.
S103: and comparing the fault distance measurement result with the actual fault distance of the fault simulation, and obtaining the test result of the fault traveling wave distance measurement device to be tested according to the comparison result and the preset requirement on the fault traveling wave distance measurement device to be tested.
The existing industry standard provides the requirements of fault traveling wave detection for a single line and the requirements of fault traveling wave detection for a cable-overhead mixed line for a fault traveling wave distance measuring device, and in addition, a user also provides the requirements of fault traveling wave detection for the cable-overhead mixed line, and the preset requirements for the fault traveling wave distance measuring device to be measured set the requirements of detection precision, detection speed and the like of the fault traveling wave distance measuring device to be measured according to actual requirements.
And comparing the fault distance measurement result of the fault traveling wave distance measurement device to be measured after the fault simulation with the actual fault distance of the fault simulation, so that the detection precision or detection error of the fault traveling wave distance measurement device to be measured can be obtained, and meanwhile, the time length from the fault generation to the fault traveling wave distance measurement device to be measured for giving the fault distance measurement result can be recorded so as to calculate the detection rate of the fault traveling wave distance measurement device to be measured, and the detection level of the fault traveling wave distance measurement device to be measured is comprehensively evaluated.
According to the test method of the cable-aerial hybrid line traveling wave fault location device, the simulation model of the regional power grid comprising the cable-aerial hybrid line is established on the detection platform provided with the fault traveling wave location device to be tested, fault simulation is carried out in the simulation model, the fault location result of the fault traveling wave location device to be tested after fault simulation is recorded, finally the fault location result is compared with the actual fault distance of the fault simulation, the test result of the fault traveling wave location device to be tested is obtained according to the comparison result and the preset requirement of the fault traveling wave location device to be tested, the fault traveling wave location capability test of the fault traveling wave location device to be tested on the cable-aerial hybrid line is achieved, and the popularization of the application of the traveling wave location device on the cable-aerial hybrid line is facilitated.
Fig. 2 is a flowchart of a specific implementation manner of step S103 in fig. 1 according to an embodiment of the present invention.
On the basis of the foregoing embodiment, in the test method for the cable-overhead mixed line traveling wave fault location apparatus provided in the embodiment of the present invention, in step S102, fault simulation is performed in a simulation model, which may specifically be:
fault simulation of a plurality of fault positions and fault simulation of a plurality of fault types are carried out in the simulation model.
By performing fault simulation of a plurality of fault positions and fault simulation of a plurality of fault types, the average level of the precision of the fault traveling wave distance measuring device to be tested for fault detection at different distances can be detected, and whether the fault traveling wave distance measuring device to be tested can adapt to different fault types can be detected.
In a specific implementation, the fault location may specifically include the head end, midpoint, tail end and out-of-zone bus bars of each type of line (including cable sections and overhead line sections).
The fault types may specifically include single-phase earth faults, phase-to-phase faults, three-phase earth faults and overline faults at transition resistances of multiple magnitudes.
Further, as shown in fig. 2, step S103 in the above embodiment: compare the actual fault distance of fault location result and fault simulation, obtain the test result of the fault traveling wave range unit that awaits measuring according to the comparison result and the preset requirement to the fault traveling wave range unit that awaits measuring, specifically include:
s201: and comparing the fault distance measurement result of the fault traveling wave distance measurement device to be measured in each fault simulation with the corresponding actual fault distance to obtain a plurality of comparison results.
S202: and calculating each comparison result according to a preset mode to obtain a final comparison result of the fault traveling wave distance measuring device to be measured.
S203: and obtaining a test result of the fault traveling wave distance measuring device to be measured according to the final comparison result and the preset requirement of the fault traveling wave distance measuring device to be measured.
The fault traveling wave distance measuring device to be measured is tested for fault distance measuring capacity for multiple times through fault simulation of multiple fault positions and fault simulation of multiple fault types, multiple comparison results are obtained, weighted average calculation is carried out on the comparison results or other calculation modes are adopted, the final comparison result of the fault traveling wave distance measuring device to be measured is obtained, the test result of the fault traveling wave distance measuring device to be measured is obtained according to the final comparison result and the preset requirement on the fault traveling wave distance measuring device to be measured, and therefore the comprehensiveness of the fault distance measuring capacity test on the fault traveling wave distance measuring device to be measured is improved.
Furthermore, the fault simulation of one fault type at one fault position can be tested for multiple times, the test result with larger deviation is eliminated, the average value is obtained, and then the comparison result of the fault type at the fault position is determined, so that the accuracy of the fault distance measuring capability test of the fault traveling wave distance measuring device to be tested is further improved.
On the basis of the above detailed description of various embodiments corresponding to the method for testing the traveling wave fault location device of the cable-overhead mixed line, the invention also discloses a testing device, equipment and a computer readable storage medium of the traveling wave fault location device of the cable-overhead mixed line corresponding to the method.
Fig. 3 is a schematic structural diagram of a testing device of a cable-overhead hybrid line traveling wave fault location device according to an embodiment of the present invention.
As shown in fig. 3, a testing apparatus of a cable-overhead hybrid line traveling wave fault location apparatus according to an embodiment of the present invention includes:
the modeling unit 301 is used for establishing a simulation model of a regional power grid comprising a cable-overhead hybrid line on a detection platform provided with a fault traveling wave ranging device to be detected;
the simulation unit 302 is configured to perform fault simulation in the simulation model, and record a fault location result of the to-be-tested fault traveling wave location device after fault simulation;
and the checking unit 303 is configured to compare the fault location result with the actual fault distance of the fault simulation, and obtain a test result of the fault traveling wave location device to be tested according to the comparison result and a preset requirement for the fault traveling wave location device to be tested.
Since the embodiments of the apparatus portion and the method portion correspond to each other, please refer to the description of the embodiments of the method portion for the embodiments of the apparatus portion, which is not repeated here.
Fig. 4 is a schematic structural diagram of a testing device of a cable-overhead hybrid line traveling wave fault location apparatus according to an embodiment of the present invention.
As shown in fig. 4, the testing apparatus of the traveling wave fault location device for a cable-overhead hybrid line according to the embodiment of the present invention includes:
a memory 410 for storing instructions, the instructions comprising the steps of the method for testing a cable-overhead hybrid line traveling wave fault location apparatus according to any one of the above embodiments;
a processor 420 for executing the instructions.
Among other things, processor 420 may include one or more processing cores, such as a 3-core processor, an 8-core processor, and so forth. The processor 420 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). Processor 420 may also include a main processor and a coprocessor, where the main processor is a processor for processing data in the wake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 420 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content that the display screen needs to display. In some embodiments, processor 420 may further include an AI (Artificial Intelligence) processor for processing computational operations related to machine learning.
Memory 410 may include one or more computer-readable storage media, which may be non-transitory. Memory 410 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 410 is at least used for storing a computer program 411, wherein after the computer program 411 is loaded and executed by the processor 420, the relevant steps in the test method for the traveling wave fault location device of the cable-overhead hybrid line disclosed in any one of the foregoing embodiments can be implemented. In addition, the resources stored by the memory 410 may also include an operating system 412, data 413, and the like, and the storage may be transient storage or permanent storage. Operating system 412 may be Windows, among others. The data 413 may include, but is not limited to, data involved in the above-described methods.
In some embodiments, the testing apparatus of the cable-overhead hybrid line traveling wave fault location device may further include a display 430, a power supply 440, a communication interface 450, an input-output interface 460, a sensor 470, and a communication bus 480.
Those skilled in the art will appreciate that the configuration shown in fig. 4 does not constitute a limitation of the testing apparatus of the cable-overhead hybrid line traveling wave fault ranging device and may include more or fewer components than those shown.
The test equipment of the cable-overhead mixed line traveling wave fault location device provided by the embodiment of the application comprises the memory and the processor, and the processor can realize the test method of the cable-overhead mixed line traveling wave fault location device when executing the program stored in the memory, and the effect is the same as that of the test method.
It should be noted that the above-described embodiments of the apparatus and device are merely illustrative, for example, the division of modules is only one division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of modules 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, devices or modules, and may be in an electrical, mechanical or other form. Modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present application may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and performs all or part of the steps of the methods according to the embodiments of the present invention, or all or part of the technical solution.
To this end, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the test method of the traveling wave fault location apparatus for a cable-overhead hybrid line.
The computer-readable storage medium may include: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The computer program contained in the computer-readable storage medium provided in this embodiment can implement the steps of the method for testing a cable-overhead hybrid line traveling wave fault location device as described above when executed by a processor, and the effects are the same.
The above detailed description describes the testing method, testing device, testing equipment and computer readable storage medium of the cable-overhead mixed line traveling wave fault location device provided by the invention. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device, the apparatus and the computer-readable storage medium disclosed in the embodiments correspond to the method disclosed in the embodiments, so that the description is simple, and the relevant points can be referred to the description of the method. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A test method of a traveling wave fault location device of a cable-overhead mixed line is characterized by comprising the following steps:
establishing a simulation model of a regional power grid comprising a cable-overhead mixed line on a detection platform provided with a fault traveling wave distance measuring device to be detected;
carrying out fault simulation in the simulation model, and recording a fault location result of the fault traveling wave location device to be tested after the fault simulation;
and comparing the fault distance measurement result with the actual fault distance of the fault simulation, and obtaining a test result of the fault traveling wave distance measurement device to be measured according to the comparison result and the preset requirement on the fault traveling wave distance measurement device to be measured.
2. The testing method according to claim 1, characterized in that the simulation model is in particular an electromagnetic transient model.
3. The testing method according to claim 1, wherein the fault simulation is performed in the simulation model, specifically:
and performing fault simulation of a plurality of fault positions and fault simulation of a plurality of fault types in the simulation model.
4. A test method according to claim 3, characterized in that the fault locations comprise in particular the head end, the midpoint, the tail end and the out-of-zone bus of each type of line.
5. The test method according to claim 3, characterized in that the fault types comprise in particular single-phase earth faults, phase-to-phase faults, three-phase earth faults and overline faults at transition resistances of a plurality of magnitudes.
6. The testing method according to claim 3, wherein the comparing the fault location result with the actual fault distance of the fault simulation, and obtaining the testing result of the fault traveling wave location device to be tested according to the comparing result and the preset requirement for the fault traveling wave location device to be tested specifically comprises:
comparing the fault location result of the fault traveling wave location device to be tested in each fault simulation with the corresponding actual fault distance to obtain a plurality of comparison results;
calculating each comparison result according to a preset mode to obtain a final comparison result of the fault traveling wave distance measuring device to be measured;
and obtaining a test result of the fault traveling wave distance measuring device to be measured according to the final comparison result and the preset requirement of the fault traveling wave distance measuring device to be measured.
7. The testing method according to claim 1, wherein the testing platform specifically comprises: the system comprises a PSCAD (power system computer aided design) offline simulation platform for carrying the simulation model, a traveling wave distance measurement calibrator connected with the PSCAD offline simulation platform, and a to-be-detected fault traveling wave distance measurement device connected with the traveling wave distance measurement calibrator.
8. A testing device of a traveling wave fault location device for a cable-overhead hybrid line is characterized by comprising:
the modeling unit is used for establishing a simulation model of a regional power grid comprising a cable-overhead mixed line on a detection platform provided with the fault traveling wave distance measuring device to be detected;
the simulation unit is used for carrying out fault simulation in the simulation model and recording a fault location result of the fault traveling wave location device to be tested after the fault simulation;
and the checking unit is used for comparing the fault distance measurement result with the actual fault distance of the fault simulation, and obtaining the test result of the fault traveling wave distance measurement device to be measured according to the comparison result and the preset requirement on the fault traveling wave distance measurement device to be measured.
9. A test equipment of a cable-overhead mixed line traveling wave fault location device is characterized by comprising:
a memory for storing instructions comprising the steps of a method of testing a cable-overhead hybrid line traveling wave fault location apparatus of any one of claims 1 to 7;
a processor to execute the instructions.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for testing a cable-overhead hybrid line traveling wave fault ranging apparatus according to any one of claims 1 to 7.
Priority Applications (1)
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| CN113359080A (en) * | 2021-07-08 | 2021-09-07 | 国网浙江省电力有限公司电力科学研究院 | Fault test distance error calibration method for cable fault flash tester |
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Application publication date: 20200922 |