Method and system for testing traveling wave distance measuring device

Abstract

The invention discloses a method and system for testing a traveling wave fault location device, and belongs to the technical field of power distribution network fault location. The method comprises the following steps: simulating an actual working condition of a power distribution network overhead cable hybrid line, carrying out pre-test detection on a traveling wave distance measurement device, and accessing the traveling wave distance measurement device to the actual working condition after the detection is correct; carrying out a fault distance measurement test through the traveling wave distance measurement device in the actual working condition, and obtaining a test result; and determining the performance of the traveling wave distance measurement device based on the test result. Effective support is provided for effectiveness and scientificity of testing of the power distribution network overhead-cable mixed line downlink wave distance measuring device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power distribution network fault location, and more particularly, to a method and system for testing a traveling wave distance measurement device. BACKGROUND

[0002] The power distribution system is at the end of the power grid and is the intermediate link connecting the power generation system, power transmission system and users. The operation level of the power distribution system directly affects the power supply quality to users, and its safety and reliability are the key to ensuring stable power supply to users. The power distribution network has many aspects, large system size and complex operating environment, and the fault causes are complex. Once a fault occurs or is threatened, if timely measures are not taken, it may develop into a cascading failure, leading to large-scale power outages, affecting daily life of users and causing huge economic losses.

[0003] With the rapid development of the economy, the urbanization rate is becoming higher and higher. As the key link directly facing users, the architecture and layout of the power distribution network are constantly evolving. In order to adapt to the complex geographical environment, building planning and electricity demand of the city, overhead-cable hybrid lines are increasingly widely used in power distribution networks. On the one hand, overhead lines have the advantages of relatively low construction cost and convenient construction, and are still widely used in some open areas or places where there is no high requirement for line erection space. On the other hand, cable lines play an important role in urban central areas, densely populated areas and places with high requirements for power supply stability due to their characteristics of small occupation of land, less influence from the external environment, high power supply reliability, etc. Therefore, there are many overhead-cable hybrid lines in the distribution network. When the overhead-cable hybrid line of the power distribution network fails, quickly and accurately locating the fault point becomes the key to ensuring power supply reliability, reducing power outage time and reducing economic losses. Power outage will not only cause direct production loss and equipment loss to industrial production, but also cause many inconveniences to residents' life, and even may affect the normal operation of some key fields such as medical treatment, transportation, etc. The traveling wave distance measurement device is based on the characteristics of traveling wave propagation on the fault line, and calculates the fault location by detecting the time difference of traveling wave arriving at different monitoring points. It has high theoretical distance measurement accuracy and fast response ability, and has been applied to a certain extent in the field of power distribution network fault location.

[0004] However, the performance of the traveling wave fault location devices produced by different manufacturers on the market is significantly different. Although the products of some manufacturers can achieve a certain distance measurement accuracy under simulation conditions, their accuracy and reliability are greatly discounted in the actual complex distribution network operating environment. This is mainly due to the lack of scientific, comprehensive and effective test system and verification method. The existing test system has many shortcomings when simulating the actual overhead-cable hybrid line working condition of the distribution network. In terms of fault type simulation, the fault types that may occur in the actual distribution network are complex and diverse. In addition to the common ground fault, there are short circuit fault and broken line fault, which brings great challenges to fault location and positioning. The existing traveling wave fault location device test system often cannot comprehensively simulate these complex fault types, and it is also difficult to effectively test at different fault locations (such as any position of the overhead section, the cable section, and the mixed section). SUMMARY

[0005] In order to improve the application effect of the traveling wave fault location device in the actual distribution network, a system and a detection method for the overhead-cable hybrid line of the distribution network are needed, which can comprehensively and accurately simulate the actual working condition and effectively detect the performance of the traveling wave fault location device. Based on the present application, a method for testing the traveling wave fault location device is proposed, which comprises:

[0006] Simulate the actual working condition of the overhead-cable hybrid line of the distribution network, and test the traveling wave fault location device before testing. After the detection is correct, the traveling wave fault location device is connected to the actual working condition;

[0007] In the actual working condition, the traveling wave fault location device is used to perform a fault location test, and the test results are obtained;

[0008] Based on the test results, the performance of the traveling wave fault location device is determined.

[0009] Optionally, the actual working condition comprises:

[0010] An overhead and cable hybrid line area for generating a typical distribution network wiring mode;

[0011] A test device access area for accessing the traveling wave fault location device;

[0012] A fault occurrence area for switching the fault point and setting different types of ground faults at the fault point.

[0013] Optionally, the overhead and cable hybrid line area comprises at least two overhead lines and two cable lines;

[0014] The at least two overhead lines and two cable lines are connected to form a network structure, an overhead network structure, or a cable network single ring network structure through a switch conversion mode.

[0015] Wherein, by controlling the breaking state of sectional switches, tie switches and circuit breakers in the network structure, overhead network structure or cable network single ring network structure, a typical distribution network wiring mode is generated.

[0016] Optionally, the network structure includes at least 6 kinds, the overhead network structure includes at least 5 kinds, and the cable network single ring network structure includes at least 1 kind.

[0017] Optionally, the traveling wave distance measurement device comprises:

[0018] The independent monitoring terminal and the fusion monitoring terminal.

[0019] Optionally, the test device access area is used for accessing the independent monitoring terminal and the fusion monitoring terminal, the independent monitoring terminal is installed on a power distribution line conductor of the test device access area, and the independent monitoring terminal is used for monitoring, collecting, processing, storing and sending the traveling wave current signal and the power frequency current signal of the power distribution line in real time, the fusion monitoring terminal is installed on a circuit breaker of a primary and secondary fusion column and a power distribution automation terminal of the power distribution line, and the fusion monitoring terminal is used for monitoring, collecting, processing, storing and sending the traveling wave current signal or traveling wave voltage signal, the power frequency current signal and the power frequency voltage signal of the power distribution line in real time.

[0020] Optionally, the traveling wave distance measurement device is tested and detected before testing, and the testing and detecting comprises:

[0021] The traveling wave distance measurement device is sequentially subjected to appearance inspection, parameter adjustment, communication testing and waveform testing;

[0022] The appearance inspection comprises appearance, rust and damage inspection of parts and fastening inspection of parts;

[0023] The communication testing comprises communication testing of the traveling wave distance measurement device on the data center station;

[0024] The waveform testing comprises reporting waveform data of current and voltage changes of the traveling wave distance measurement device under actual working conditions to the data center station.

[0025] Optionally, when the appearance inspection, the parameter adjustment, the communication testing and the waveform testing all meet the testing requirements, the traveling wave distance measurement device is connected to the actual working condition.

[0026] Optionally, the test result comprises a fault time and a traveling wave distance measurement result.

[0027] In another aspect, the application further provides a system for testing the traveling wave distance measurement device, which comprises:

[0028] The simulation unit is configured to simulate actual working conditions of the overhead cable hybrid line of the power distribution network, and to detect the traveling wave distance measurement device before testing, and to connect the traveling wave distance measurement device to the actual working conditions after the detection is correct.

[0029] The test unit is configured to perform a fault distance measurement test by using the traveling wave distance measurement device in the actual working conditions, and to obtain a test result.

[0030] The output unit is configured to determine the performance of the traveling wave distance measurement device based on the test result.

[0031] Optionally, the actual working conditions include:

[0032] The overhead and cable hybrid line area is configured to generate a typical power distribution network wiring mode.

[0033] The test device access area is configured to access the traveling wave distance measurement device.

[0034] The fault occurrence area is configured to switch a fault point and set different types of ground faults at the fault point.

[0035] Optionally, the overhead and cable hybrid line area includes at least two overhead lines and two cable lines.

[0036] The at least two overhead lines and the two cable lines are configured to form a network structure, an overhead network structure, or a cable network single-loop network structure by switching.

[0037] The typical power distribution network wiring mode is generated by controlling the switching states of sectional switches, tie switches, and circuit breakers in the network structure, the overhead network structure, or the cable network single-loop network structure.

[0038] Optionally, the network structure includes at least six types, the overhead network structure includes at least five types, and the cable network single-loop network structure includes at least one type.

[0039] Optionally, the traveling wave distance measurement device includes:

[0040] The independent monitoring terminal and the fusion monitoring terminal.

[0041] Optionally, the test device access area is configured to access the independent monitoring terminal and the fusion monitoring terminal. The independent monitoring terminal is installed on a power distribution line conductor in the test device access area, and is configured to monitor, collect, process, store, and send the traveling wave current signal and the power frequency current signal of the power distribution line in real time. The fusion monitoring terminal is installed on a circuit breaker of a primary and secondary fusion column and a power distribution automation terminal of the power distribution line, and is configured to monitor, collect, process, store, and send the traveling wave current signal or the traveling wave voltage signal, the power frequency current signal, and the power frequency voltage signal of the power distribution line in real time.

[0042] Optionally, the pre-test detection of the traveling wave distance measurement device comprises:

[0043] The traveling wave distance measurement device is sequentially subjected to appearance inspection, parameter adjustment, communication test and waveform test.

[0044] The appearance inspection comprises rust and damage inspection of the appearance and parts and fastening inspection of the parts.

[0045] The communication test comprises communication test of the traveling wave distance measurement device with the data center station.

[0046] The waveform test comprises reporting waveform data collected by the traveling wave distance measurement device on current and voltage changes under actual working conditions to the data center station.

[0047] Optionally, when the appearance inspection, parameter adjustment, communication test and waveform test all meet the test requirements, the traveling wave distance measurement device is connected to the actual working conditions.

[0048] Optionally, the test results comprise fault time and traveling wave distance measurement results.

[0049] In another aspect, the present application further provides a computing device comprising one or more processors.

[0050] The processor is configured to execute one or more programs.

[0051] When the one or more programs are executed by the one or more processors, the method described above is implemented.

[0052] In another aspect, the present application further provides a computer readable storage medium having a computer program stored thereon, wherein the computer program is executed to implement the method described above.

[0053] Compared with the prior art, the present application has the following advantages:

[0054] The present application provides a method for testing a traveling wave distance measurement device, which comprises simulating actual working conditions of a hybrid overhead-cable line of a power distribution network, and detecting the traveling wave distance measurement device before testing, and connecting the traveling wave distance measurement device to the actual working conditions after the detection is correct. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 The present application provides a method for testing a traveling wave distance measurement device, which comprises simulating actual working conditions of a hybrid overhead-cable line of a power distribution network, and detecting the traveling wave distance measurement device before testing, and connecting the traveling wave distance measurement device to the actual working conditions after the detection is correct.

[0056] Figure 2 a wiring diagram for overhead and cable hybrid line area of the method of the present application;

[0057] Figure 3 a schematic diagram for fault scenario setting of the method of the present application;

[0058] Figure 4 a flow chart for testing of the method of the present application;

[0059] Figure 5 a structure diagram for the system of the present application. DETAILED DESCRIPTION

[0060] Reference will now be made to the exemplary embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments of the present application are not limited to the examples described herein, but can be implemented in many different forms. These embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art. The terminology used in the description of the exemplary embodiments herein is not intended to be limiting of the present application. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0061] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0062] Embodiment 1:

[0063] The present application proposes a method for testing a traveling wave distance measurement device, as shown in the accompanying drawings, comprising: Figure 1

[0064] Step 1, simulate the actual working condition of the overhead and cable hybrid line of the power distribution network, and perform pre-test detection on the traveling wave distance measurement device, and after the detection is correct, connect the traveling wave distance measurement device to the actual working condition;

[0065] Step 2, in the actual working condition, perform fault distance measurement test by the traveling wave distance measurement device, and obtain the test result;

[0066] Step 3, determine the performance of the traveling wave distance measurement device based on the test result.

[0067] Wherein, the actual working condition comprises:

[0068] The overhead and cable hybrid line area is used to generate a typical power distribution network wiring mode;

[0069] The testing device access area is used to access the traveling wave distance measurement device;

[0070] ​Fault occurrence area, for switching fault points and setting different types of grounding faults at the fault points.

[0071] Wherein, the overhead and cable hybrid line area includes at least two overhead lines and two cable lines;

[0072] Wherein, the at least two overhead lines and two cable lines are converted by switches to form a mesh structure, an overhead mesh structure or a cable mesh single ring network structure;

[0073] Wherein, by controlling the breaking state of sectional switches, tie switches and circuit breakers in the tie station in the mesh structure, the overhead mesh structure or the cable mesh single ring network structure, a typical distribution network wiring mode is generated.

[0074] Wherein, the mesh structure includes at least 6 types, the overhead mesh structure includes at least 5 types, and the cable mesh single ring network structure includes at least 1 type.

[0075] Wherein, the traveling wave distance measuring device includes:

[0076] Independent monitoring terminal and fusion monitoring terminal.

[0077] Wherein, the test device access area is used to access the independent monitoring terminal and the fusion monitoring terminal, the independent monitoring terminal is installed on the distribution line conductor in the test device access area, and the traveling wave current signal and the power frequency current signal of the distribution line are monitored, collected, processed, stored and transmitted in real time, the fusion monitoring terminal is installed on the circuit breaker and the distribution automation terminal in the primary and secondary fusion column on the distribution line, and the traveling wave current signal or the traveling wave voltage signal, the power frequency current signal and the power frequency voltage signal of the distribution line are monitored, collected, processed, stored and transmitted in real time.

[0078] Wherein, the pre-test detection of the traveling wave distance measuring device includes:

[0079] The traveling wave distance measuring device is sequentially subjected to appearance inspection, parameter adjustment, communication test and waveform test;

[0080] Wherein, the appearance inspection includes rust and damage inspection of appearance and parts, and fastening inspection of parts;

[0081] The communication test includes communication test of the traveling wave distance measuring device with the data center station;

[0082] The waveform test includes reporting the waveform data collected by the traveling wave distance measuring device on the current and voltage changes under actual working conditions to the data center station.

[0083] When the appearance inspection, parameter adjustment, communication test and waveform test all meet the test requirements, the traveling wave distance measuring device is connected to the actual working condition.

[0084] The test results include the fault time and the traveling wave distance measurement result.

[0085] The application will be further described below in combination with specific cases:

[0086] In the specific case, the wiring of the overhead and cable mixed line area in the actual working condition is as shown in Figure 2 The overhead and cable mixed line area is composed of 2 overhead lines with a length of 7 km and 2 cable lines with a length of 6 km. Six network frame structures are realized by switching, including 5 structures of overhead network (single radiation, end tie, multi-section moderate tie, two supply and one standby, three supply and one standby), and one structure of single ring network of cable network. The opening and closing states of the sectional switches and tie switches in the network and the circuit breakers in the tie station can be controlled, so that the above-mentioned typical distribution network wiring modes can be quickly formed.

[0087] The test device access area is currently divided into independent monitoring terminals and fusion monitoring terminals. The independent monitoring terminal is installed on the distribution line conductor, and independently monitors, collects, processes, stores and transmits the traveling wave current and power frequency current signals of the distribution line in real time. The access mode is as shown in Figure 2 The fusion monitoring terminal is installed on the circuit breaker and distribution automation terminal of the primary and secondary fusion column of the distribution line, and monitors, collects, processes, stores and transmits the traveling wave current or voltage, power frequency current and power frequency voltage signals of the distribution line in real time. The access mode is as shown in Figure 3 .

[0088] The fault occurrence area can flexibly access different faults on the system, and the flexibility is reflected in two aspects: one is the flexible selection of the fault access point, and the other is the flexible setting of different grounding fault types. The principle is as shown in Figure 3 Six grounding wells are set at different positions on the network frame of the examination field. Among them Figure 3 The left grounding well on the left side of the left side is the grounding position of the overhead single circuit, which is set at 20%, 40% and 60% of the line from bottom to top. Similarly, Figure 3 The right grounding well on the right side is the grounding position of the overhead two-circuit, which is set at 20%, 40% and 60% of the line from bottom to top. Different fault positions cooperate with variable network frame, which can realize the setting of 7 kinds of fault positions such as single point, multi-point fault, line head, middle and end fault, trunk line and branch line fault. It can reproduce 11 kinds of fault types such as metallic, arc light, intermittent, instantaneous, high resistance grounding (cement, asphalt, grassland, land, sandstone, etc.), phase-to-phase ground short circuit, etc.

[0089] According to the system condition of the overhead-cable hybrid line of the power distribution network, a traveling wave distance measurement device is arranged and installed, and test detection is carried out, such as Figure 4 As shown in the figure, the detection step includes:

[0090] 1) Appearance inspection of the traveling wave distance measurement device: the terminal sample should meet the following conditions: there is no obvious dent, scratch, crack, deformation and pollution on the surface of the shell, the surface coating layer should be uniform, without blistering, cracking, peeling and wear, the metal parts are free of rust and other mechanical damage; and each part is fastened without loosening.

[0091] 2) Parameter adjustment of the traveling wave distance measurement device: in order to ensure the data transmission reliability in the detection process, the parameters of the monitoring terminal are configured before the test.

[0092] 3) Communication test: in order to verify the communication condition between the data center station and the monitoring terminal, the communication test is carried out before the test;

[0093] 4) Waveform test: through the test system, the current and voltage of the test loop are changed, and the corresponding waveform data of the monitoring terminal reported to the data center station is verified;

[0094] 5) Fault diagnosis result test: through the test system, a single-phase grounding fault is generated, the fault time is recorded, and the distance measurement result of the data center station should meet the requirements;

[0095] Example 2:

[0096] The application further provides a system 200 for testing the traveling wave distance measurement device, as shown in the figure, comprising: Figure 5

[0097] The simulation unit 201 is used for simulating the actual working condition of the overhead-cable hybrid line of the power distribution network, and testing the traveling wave distance measurement device before testing, and after the detection is correct, the traveling wave distance measurement device is connected to the actual working condition;

[0098] The test unit 202 is used for testing the traveling wave distance measurement device in the actual working condition, and obtaining the test result;

[0099] The output unit 203 is used for determining the performance of the traveling wave distance measurement device based on the test result.

[0100] The actual working condition includes:

[0101] The overhead-cable hybrid line area is used for generating a typical power distribution network wiring mode;

[0102] The test device access area is used for accessing the traveling wave distance measurement device;

[0103] The fault occurrence area is used for switching the fault point and setting different types of grounding faults at the fault point. ​

[0104] Wherein, the overhead and cable hybrid line area includes at least two overhead lines and two cable lines;

[0105] Wherein, the at least two overhead lines and two cable lines are converted by switches to form a mesh structure, an overhead mesh structure or a cable mesh single ring network structure;

[0106] Wherein, by controlling the breaking state of sectional switches, tie switches and circuit breakers in the tie station in the mesh structure, the overhead mesh structure or the cable mesh single ring network structure, a typical distribution network connection mode is generated.

[0107] Wherein, the mesh structure includes at least 6 kinds, the overhead mesh structure includes at least 5 kinds, and the cable mesh single ring network structure includes at least 1 kind.

[0108] Wherein, the traveling wave distance measuring device includes:

[0109] Independent monitoring terminal and fusion monitoring terminal.

[0110] Wherein, the test device access area is used to access the independent monitoring terminal and the fusion monitoring terminal, the independent monitoring terminal is installed on the distribution line conductor in the test device access area, and the traveling wave current signal and the power frequency current signal of the distribution line are monitored, collected, processed, stored and sent in real time, the fusion monitoring terminal is installed on the circuit breaker and the distribution automation terminal in the primary and secondary fusion column on the distribution line, and the traveling wave current signal or the traveling wave voltage signal, the power frequency current signal and the power frequency voltage signal of the distribution line are monitored, collected, processed, stored and sent in real time.

[0111] Wherein, the pre-test detection of the traveling wave distance measuring device includes:

[0112] The traveling wave distance measuring device is sequentially subjected to appearance inspection, parameter adjustment, communication test and waveform test;

[0113] Wherein, the appearance inspection includes rust and damage inspection of appearance and parts, and fastening inspection of parts;

[0114] The communication test includes communication test of the traveling wave distance measuring device with the data center station;

[0115] The waveform test includes reporting the waveform data collected by the traveling wave distance measuring device on the current and voltage changes under actual working conditions to the data center station.

[0116] Wherein, when the appearance inspection, parameter adjustment, communication test and waveform test all meet the test requirements, the traveling wave distance measuring device is connected to the actual working condition.

[0117] The test result includes: fault time and traveling wave distance measurement result.

[0118] The application considers the access of the traveling wave distance measurement device, the occurrence of the fault point position, and the flexible switching of the overhead-cable structure, and proposes a system of the overhead-cable hybrid line of the power distribution network for the traveling wave distance measurement device test, and the ranging test of the traveling wave distance measurement device is carried out by using the system, which verifies the accuracy of the traveling wave distance measurement device on one hand, and reflects the effectiveness of the system of the overhead-cable hybrid line of the power distribution network for the traveling wave distance measurement device test on the other hand.

[0119] Embodiment 3

[0120] Based on the same inventive concept, the application further provides a computer device, which comprises a processor and a memory, the memory is used for storing a computer program, the computer program comprises program instructions, and the processor is used for executing the program instructions stored in the computer storage medium. The processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The processor is the computing core and control core of the terminal, is suitable for implementing one or more instructions, is specifically suitable for loading and executing one or more instructions in the computer storage medium to implement a corresponding method flow or a corresponding function, and is suitable for implementing the steps of the method in the above embodiments.

[0121] Embodiment 4

[0122] Based on the same inventive concept, the present application also provides a storage medium, specifically a computer readable storage medium (Memory), which is a memory device in a computer device, used for storing programs and data. It can be understood that the computer readable storage medium herein can include an internal storage medium in the computer device, and of course can also include an extended storage medium supported by the computer device. The computer readable storage medium provides a storage space, which stores an operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and the instructions can be one or more computer programs (including program codes). It should be noted that the computer readable storage medium herein can be a high-speed RAM memory, or a non-volatile memory such as at least one disk memory. One or more instructions stored in the computer readable storage medium can be loaded and executed by the processor to realize the steps of the method in the above embodiments.

[0123] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present application can be implemented in various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0124] The present application is described with reference to flowcharts and / or block diagrams of the method, device (system), and computer program product according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The means for implementing the functions specified in one or more flows and / or blocks.

[0125] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the Figure 1 function specified in the flow or flows and / or blocks Figure 1 of the block or blocks.

[0126] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions that are executed on the computer or other programmable apparatus provide steps for implementing the Figure 1 function specified in the flow or flows and / or blocks Figure 1 of the block or blocks.

[0127] While the preferred embodiments of the application have been described, additional variations and modifications can be made to the embodiments by those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to cover all such additional variations and modifications as fall within the scope of the present application. What is claimed is:

[0128] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A method for testing a traveling wave distance measuring device, characterized by, The application relates to a method for testing performance of a traveling wave fault location device. The method comprises the following steps: simulating actual working conditions of an overhead cable hybrid line of a power distribution network, and pre-testing the traveling wave fault location device, and connecting the traveling wave fault location device to the actual working conditions after the pre-testing is correct; conducting a fault location test by using the traveling wave fault location device in the actual working conditions, and obtaining test results; 2. The method of claim 1, wherein, determining performance of the traveling wave fault location device based on the test results. The actual working conditions comprise: an overhead and cable hybrid line area for generating a typical power distribution network wiring mode; a test device connection area for connecting the traveling wave fault location device; 3. The method of claim 2, wherein, a fault occurrence area for switching a fault point and setting different types of ground faults at the fault point. The overhead and cable hybrid line area comprises at least two overhead lines and two cable lines; the at least two overhead lines and the two cable lines are connected to form a network structure, an overhead network structure or a cable network single loop network structure by switching; 4. The method of claim 3, wherein, the typical power distribution network wiring mode is generated by controlling breaking states of sectional switches, tie switches and circuit breakers in the network structure, the overhead network structure or the cable network single loop network structure.

5. The method of claim 1, wherein, The network structure comprises at least six types, the overhead network structure comprises at least five types, and the cable network single loop network structure comprises at least one type. The traveling wave fault location device comprises:

6. The method of claim 2, wherein, an independent monitoring terminal and a fusion monitoring terminal.

7. The method of claim 1, wherein, The test device connection area is used for connecting the independent monitoring terminal and the fusion monitoring terminal, the independent monitoring terminal is installed on a power distribution line conductor of the test device connection area, and the independent monitoring terminal is used for monitoring, collecting, processing, storing and sending real-time traveling wave current signals and power frequency current signals of the power distribution line, the fusion monitoring terminal is installed on a one-two fusion column circuit breaker and a power distribution automation terminal of the power distribution line, and the fusion monitoring terminal is used for monitoring, collecting, processing, storing and sending real-time traveling wave current signals or traveling wave voltage signals, power frequency current signals and power frequency voltage signals of the power distribution line. The pre-testing of the traveling wave fault location device comprises the following steps: the traveling wave fault location device is sequentially subjected to appearance inspection, parameter adjustment, communication test and waveform test; the appearance inspection comprises appearance and part corrosion and damage inspection and part fastening inspection; the communication test comprises communication test of the traveling wave fault location device by using a data center station; 8. The method of claim 7, wherein, the waveform test comprises reporting waveform data of current and voltage changes of the traveling wave fault location device under the actual working conditions to the data center station.

9. The method of claim 1, wherein, When the appearance inspection, the parameter adjustment, the communication test and the waveform test all meet the test requirements, the traveling wave fault location device is connected to the actual working conditions.

10. A system for testing a traveling wave distance measuring device, characterized by The test results comprise a fault time and a traveling wave fault location result. The application further relates to a testing device for testing performance of a traveling wave fault location device. The testing device comprises: a simulation unit for simulating actual working conditions of an overhead cable hybrid line of a power distribution network, and pre-testing a traveling wave fault location device, and connecting the traveling wave fault location device to the actual working conditions after the pre-testing is correct; a test unit for conducting a fault location test by using the traveling wave fault location device in the actual working conditions, and obtaining test results; an output unit for determining performance of the traveling wave fault location device based on the test results.

11. The system of claim 10, wherein, The actual working conditions include: An overhead and cable hybrid line area for generating a typical distribution network wiring mode; A test device access area for accessing a traveling wave distance measurement device; A fault occurrence area for switching a fault point and setting different types of grounding faults at the fault point.

12. The system of claim 11, wherein, The overhead and cable hybrid line area includes at least two overhead lines and two cable lines; The at least two overhead lines and two cable lines are connected to form a mesh structure, an overhead mesh structure, or a cable mesh single-loop network structure through switching. The mesh structure includes at least six types, the overhead mesh structure includes at least five types, and the cable mesh single-loop network structure includes at least one type.

13. The system of claim 12, wherein, The traveling wave distance measurement device includes:

14. The system of claim 10, wherein, An independent monitoring terminal and a fusion monitoring terminal. The test device access area is used to access the independent monitoring terminal and the fusion monitoring terminal. The independent monitoring terminal is installed on the power distribution line conductor in the test device access area, and independently monitors, collects, processes, stores, and transmits the traveling wave current signal and the power frequency current signal of the power distribution line. The fusion monitoring terminal is installed on the circuit breaker of the primary and secondary fusion column and the power distribution automation terminal of the power distribution line, and monitors, collects, processes, stores, and transmits the traveling wave current signal or the traveling wave voltage signal, the power frequency current signal, and the power frequency voltage signal of the power distribution line in real time.

15. The system of claim 11, wherein, The pre-test detection of the traveling wave distance measurement device includes:

16. The system of claim 10, wherein, Sequentially performing appearance inspection, parameter adjustment, communication test, and waveform test on the traveling wave distance measurement device; The appearance inspection includes appearance and part corrosion and damage inspection, and part fastening inspection; The communication test includes communication test of the traveling wave distance measurement device with the data center station; The waveform test includes reporting the waveform data collected by the traveling wave distance measurement device on the current and voltage changes under the actual working conditions to the data center station. When the appearance inspection, parameter adjustment, communication test, and waveform test all meet the test requirements, the traveling wave distance measurement device is connected to the actual working conditions.

17. The system of claim 16, wherein, The test results include the fault time and the traveling wave distance measurement result.

18. The system of claim 10, wherein, It includes:

19. A computer device, comprising: One or more processors; A processor for executing one or more programs; When the one or more programs are executed by the one or more processors, the method of any one of claims 1-9 is implemented. The computer program is stored thereon, and when executed, the method of any one of claims 1-9 is implemented.

20. A computer-readable storage medium, characterized in that, ​

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