Switch mechanical characteristic flexible diagnosis method and system based on intelligent oscillograph

Abstract

The invention discloses a flexible diagnosis method and system for mechanical characteristics of a switch based on an intelligent oscillograph, and relates to the technical field of relay protection of a power system, and the method comprises the steps: carrying out the transient data exchange of general-format waveform data based on an acquisition unit of the intelligent oscillograph; extracting parameter information of an analog quantity channel, a switching value channel and substation primary equipment or intervals, constructing a switch mechanical characteristic diagnosis equipment channel parameter model, and further constructing a switch mechanical characteristic diagnosis threshold parameter model; integrating the switch mechanical characteristic diagnosis equipment channel parameter model and the switch mechanical characteristic diagnosis threshold parameter model, adding station information of the transformer substation, and constructing a transformer substation switch mechanical characteristic diagnosis parameter model; and performing switch mechanical characteristic diagnosis on the fault waveform data of the transformer substation based on the transformer substation switch mechanical characteristic diagnosis parameter model. The technical problems that in the prior art, working efficiency is low, and the requirement for rapid and flexible deployment is difficult to meet are solved.

Description

Technical Field

[0001] The invention relates to the technical field of relay protection of electric power systems, and in particular to a flexible diagnosis method and system for mechanical characteristics of switches based on an intelligent recorder. Background Art

[0002] The intelligent recorder consists of a management unit and a collection unit, and undertakes a large number of operation and maintenance functions of the substation. The intelligent recorder management unit is connected to the substation protection equipment and the intelligent recorder collection unit through the substation control layer network, and communicates with the dispatching master station through the dispatching data network.

[0003] The current intelligent recorder switch mechanical characteristic diagnosis function needs to combine the protection and intelligent terminal equipment tripping and closing circuit signals received by the management unit in real time, and then extract the voltage and current analog information and switch quantity information of the corresponding interval in the acquisition unit waveform to diagnose and analyze the mechanical characteristics of the switch. However, this method has the following disadvantages: First, the intelligent recorder switch mechanical characteristic diagnosis function can only be deployed on the management unit, and the coupling degree with the signal collection function module, file transfer function module and database related to the management unit system is high. It needs to wait for the acquisition unit fault waveform data file to be uploaded before it can be carried out, and any abnormality in any link may cause the final diagnosis result to be abnormal, and the speed, flexibility and robustness are insufficient; second, it has high requirements on the real-time and clock synchronization of the data communication network. When the network is congested or the clock synchronization deviation of the management unit is too large, the diagnosis may be wrong; third, each output and confirmation of the diagnosis result requires re-testing to make the protection, intelligent terminal and acquisition unit generate the necessary signals and data files, especially in the early stage of substation construction, when the configuration and debugging of the management unit function, the communication within the substation, and the communication between the substation and the dispatching master station are not yet perfect, multiple tests are required, and there is a problem of low work efficiency, which is difficult to meet the needs of fast and flexible deployment. Summary of the invention

[0004] The purpose of the present invention is to provide a flexible diagnosis method and system for switch mechanical characteristics based on an intelligent recorder in order to solve at least one of the above technical problems.

[0005] In the first aspect, an embodiment of the present invention provides a flexible diagnosis method for switch mechanical characteristics based on an intelligent recorder, which is applied to an intelligent recorder of a substation; comprising: extracting parameter information of analog channels, switch channels, and primary equipment or intervals of a substation based on the transient data exchange common format waveform data of the acquisition unit of the intelligent recorder; constructing a switch mechanical characteristic diagnosis equipment channel parameter model based on the analog channel, the switch channel and the parameter information; constructing a switch mechanical characteristic diagnosis threshold parameter model based on the preset switch mechanical characteristic diagnosis threshold of the substation; integrating the switch mechanical characteristic diagnosis equipment channel parameter model and the switch mechanical characteristic diagnosis threshold parameter model, and adding the site information of the substation to construct a substation switch mechanical characteristic diagnosis parameter model; performing switch mechanical characteristic diagnosis on the fault waveform data of the substation based on the substation switch mechanical characteristic diagnosis parameter model.

[0006] Furthermore, based on the transient data exchange universal format waveform data of the acquisition unit of the intelligent recorder, parameter information of analog channels, switch channels, primary equipment or intervals of substations is extracted, including: obtaining configuration files and data model files in the transient data exchange universal format waveform data; extracting parameter information of analog channels, switch channels, primary equipment or intervals of substations from the configuration files and the data model files.

[0007] Furthermore, based on the analog quantity channel, the switch quantity channel and the parameter information, a channel parameter model of the switch mechanical characteristic diagnosis equipment is constructed, including: information integration of the analog quantity channel and the parameter information, associated switch quantity channel screening and associated switch quantity attribute incremental configuration, to construct the channel parameter model of the switch mechanical characteristic diagnosis equipment; wherein, the switch quantity channel screening includes: screening out switch quantity channels of types such as protection action, protection tripping, reclosing action, intelligent terminal phase circuit breaker position, intelligent terminal circuit breaker total position, and intelligent terminal tripping and closing outlet recovery from the switch quantity channels; the switch quantity attribute incremental configuration includes: the protection device in dual configuration, the intelligent terminal device association relationship type attribute, the side switch and the middle switch association relationship attribute of the 3 / 2 wiring method, and the association relationship attributes of each branch on the high voltage side, the medium voltage side, and the low voltage side of the transformer.

[0008] Furthermore, the preset switch mechanical characteristic diagnostic thresholds include: a delay threshold from fault occurrence to switch opening, a phase current disappearance threshold, a switch opening to phase current disappearance time, a switch closing delay threshold, a switch closing to phase current recovery time, three-phase out-of-phase time, a maximum zero-sequence current, a maximum negative-sequence current, and a non-residual current peak threshold between contacts.

[0009] Furthermore, the site information includes: substation voltage level, substation name, device model and version of the intelligent recorder.

[0010] Furthermore, based on the substation switch mechanical characteristic diagnosis parameter model, the fault waveform data of the substation is diagnosed with switch mechanical characteristics, including: parsing the fault waveform data to obtain a list of position-changing switch quantity channels; traversing the list of position-changing switch quantity channels, and screening out switches to be diagnosed that need to be diagnosed with mechanical characteristics by comparing with the substation switch mechanical characteristic diagnosis parameter model; the switches to be diagnosed are switches whose opening and closing positions have changed in the fault waveform data; based on the association relationship of the switches to be diagnosed, analog channel data associated with the fault waveform data are read; based on the analog channel data, action information of the switches to be diagnosed during the fault process is calculated; the action information of the switches to be diagnosed includes the time of the protection action signal, the time of the three-phase opening of the switch, the time of the disappearance of the fault phase current, the time of the three-phase closing of the switch, the time of the phase current recovery after closing, and the negative sequence current and zero sequence current when the three phases are in different phases; based on the position change of the switch to be diagnosed and the action information of the switch to be diagnosed, a switch mechanical characteristic diagnosis result of the switch to be diagnosed is generated.

[0011] In the second aspect, an embodiment of the present invention further provides a flexible diagnosis system for switch mechanical characteristics based on an intelligent recorder, which is applied to an intelligent recorder of a substation; it includes: an extraction module, a first construction module, a second construction module, a third construction module and a diagnosis module; wherein the extraction module is used to extract parameter information of analog channels, switch channels, and primary equipment or intervals of a substation based on the transient data exchange general format waveform data of the acquisition unit of the intelligent recorder; the first construction module is used to construct a switch mechanical characteristic diagnosis equipment channel parameter model based on the analog channel, the switch channel and the parameter information; the second construction module is used to construct a switch mechanical characteristic diagnosis threshold parameter model based on the preset switch mechanical characteristic diagnosis threshold of the substation; the third construction module is used to integrate the switch mechanical characteristic diagnosis equipment channel parameter model and the switch mechanical characteristic diagnosis threshold parameter model, and add the site information of the substation to construct a substation switch mechanical characteristic diagnosis parameter model; the diagnosis module is used to perform switch mechanical characteristic diagnosis on the fault waveform data of the substation based on the substation switch mechanical characteristic diagnosis parameter model.

[0012] Furthermore, the diagnosis module is also used to: parse the fault waveform data to obtain a list of position-changing switch quantity channels; traverse the list of position-changing switch quantity channels, and screen out the switches to be diagnosed that need to undergo mechanical characteristic diagnosis by comparing them with the mechanical characteristic diagnosis parameter model of the substation switch; the switches to be diagnosed are switches whose opening and closing positions have changed in the fault waveform data; based on the association relationship of the switches to be diagnosed, read the analog quantity channel data associated in the fault waveform data; calculate the action information of the switches to be diagnosed during the fault process according to the analog quantity channel data; the action information of the switches to be diagnosed includes the time of the protection action signal, the time of the three-phase opening of the switch, the time of the disappearance of the fault phase current, the time of the three-phase closing of the switch, the time of the phase current recovery after closing, and the negative sequence current and zero sequence current when the three phases are in different phases; based on the position change of the switch to be diagnosed and the action information of the switch to be diagnosed, generate the switch mechanical characteristic diagnosis result of the switch to be diagnosed.

[0013] In a third aspect, an embodiment of the present invention further provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method described in the first aspect when executing the computer program.

[0014] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the method described in the first aspect above is implemented.

[0015] The present invention provides a flexible switch mechanical characteristic diagnosis method and system based on an intelligent recorder. By constructing a substation switch mechanical characteristic diagnosis parameter model, the substation switch mechanical characteristic diagnosis can be quickly performed with flexible deployment, alleviating the technical problems of low work efficiency and difficulty in meeting the needs of rapid and flexible deployment in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A flow chart of a flexible switch mechanical characteristic diagnosis method based on an intelligent recorder provided in an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of a flexible switch mechanical characteristic diagnosis system based on an intelligent recorder provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Embodiment 1

[0021] Figure 1 1 is a flow chart of a flexible switch mechanical characteristic diagnosis method based on an intelligent recorder according to an embodiment of the present invention, and the method is applied to an intelligent recorder in a substation. Figure 1 As shown, the method specifically comprises the following steps:

[0022] Step S102, based on the transient data exchange common format waveform data of the acquisition unit of the intelligent recorder, extract parameter information of the analog channel, switch channel, substation primary equipment or bay.

[0023] In an embodiment of the present invention, the startup property of the standard common format for transient data exchange (comtrade) waveform data generated by the acquisition unit can be any one of fault recording ("F"), circuit breaker position recording ("B"), harmonic event recording ("N"), startup recording ("S"), manual recording ("H"), and normal recording ("C").

[0024] Optionally, the analog quantity channel includes a three-phase voltage channel and a three-phase current channel.

[0025] Step S104, constructing a channel parameter model of the switch mechanical characteristic diagnosis device based on the analog channel, the switch channel and the parameter information.

[0026] Step S106: constructing a switch mechanical characteristic diagnosis threshold parameter model based on the preset switch mechanical characteristic diagnosis threshold of the substation.

[0027] Step S108, integrating the switch mechanical characteristic diagnosis equipment channel parameter model and the switch mechanical characteristic diagnosis threshold parameter model, and adding the substation site information to construct the substation switch mechanical characteristic diagnosis parameter model.

[0028] Step S110 , based on the substation switch mechanical characteristic diagnosis parameter model, perform switch mechanical characteristic diagnosis on the fault waveform data of the substation.

[0029] Specifically, step S102 also includes the following steps:

[0030] Step S1021, obtaining a configuration file (CFG file) and a data model file (DMF) in the transient data exchange universal format waveform data;

[0031] Step S1022, extracting parameter information of analog quantity channels, switch quantity channels, substation primary equipment or bays from the configuration files and data model files.

[0032] In an optional implementation manner provided by an embodiment of the present invention, parameter information in the CFG file and the DMF file is extracted, specifically including: the number, name, associated primary equipment, rated frequency, phase, unit, primary rated value, and secondary rated value of each voltage and current channel; the number, type, contact state, and associated primary equipment of the switch channel; the primary rated voltage, secondary rated voltage, TV installation position, and associated voltage channel number of the bus equipment; the primary rated voltage, primary rated current, secondary rated current, line length, positive-sequence resistance, inductance, reactance, and capacitance, zero-sequence resistance, inductance, reactance, and capacitance, the associated current and voltage channel number, and the switch channel number of the line equipment; the name, rated capacity, associated current and voltage channel number, and switch channel number of the transformer equipment.

[0033] Specifically, step S104 also includes: integrating analog channel and parameter information, screening associated switch channel and configuring associated switch attribute increments, and constructing a switch mechanical characteristic diagnostic equipment channel parameter model; wherein,

[0034] The switch quantity channel screening includes: screening out switch quantity channels of types such as protection action, protection tripping, reclosing action, intelligent terminal phase breaker position, intelligent terminal circuit breaker total position, and intelligent terminal tripping and closing outlet recovery from the switch quantity channels;

[0035] The incremental configuration of switch quantity attributes includes: protection devices in dual configuration, intelligent terminal device association (A set and B set) type attributes, side switches and middle switches in 3 / 2 wiring mode, and association attributes of each branch on the high voltage side, medium voltage side, and low voltage side of the transformer.

[0036] In an optional implementation manner provided by an embodiment of the present invention, the preset switch mechanical characteristic diagnostic thresholds include: a delay threshold from fault occurrence to switch opening (unit: milliseconds), a phase current disappearance threshold (unit: ampere), a switch opening to phase current disappearance time (unit: milliseconds), a switch closing delay threshold (unit: milliseconds), a switch closing to phase current recovery time (unit: milliseconds), a three-phase out-of-phase time (unit: milliseconds), a maximum zero-sequence current (unit: ampere), a maximum negative-sequence current (unit: ampere), and a non-residual current peak threshold between contacts (unit: ampere).

[0037] In the embodiment of the present invention, the preset switch mechanical characteristic diagnosis threshold can be adjusted according to the actual situation of the substation and the threshold setting requirements. For example, the switch opening delay threshold can be set to 15 milliseconds, and the switch closing delay threshold can be set to 5 milliseconds.

[0038] In an optional implementation manner provided by an embodiment of the present invention, the site information includes: substation voltage level, substation name, device model and version of the intelligent recorder.

[0039] Specifically, step S110 also includes the following steps:

[0040] Step S1101, analyzing the fault waveform data to obtain a list of position-changing switch channels;

[0041] Step S1102, traverse the list of position-changing switch quantity channels, and screen out switches to be diagnosed that need to be diagnosed by comparing the mechanical characteristic diagnosis parameter model of the substation switch; the switches to be diagnosed are switches whose opening and closing positions have changed in the fault waveform data;

[0042] Step S1103, based on the association relationship of the switch to be diagnosed, reading the analog channel data associated with the fault waveform data; wherein the analog channel data includes three-phase voltage channel data and three-phase current channel data;

[0043] Step S1104, calculating the switch action information to be diagnosed during the fault process according to the analog channel data; the switch action information to be diagnosed includes the time of the protection action signal, the time of the three-phase opening of the switch, the time when the fault phase current disappears, the time of the three-phase closing of the switch, the time when the phase current recovers after closing, and the negative sequence current and zero sequence current when the three phases are out of phase;

[0044] Step S1105 , generating a switch mechanical characteristic diagnosis result of the switch to be diagnosed based on the position change of the switch to be diagnosed and the action information of the switch to be diagnosed.

[0045] Optionally, the switch action information to be diagnosed includes: the time of switch opening and closing, the time of disappearance and recovery of three-phase current, the consistency of the three-phase position of the switch, whether current pulses appear again for a period of time after the switch is disconnected and the current passes through zero, etc.

[0046] Specifically, the current sampling value, the switch opening and closing time value, the corresponding threshold value, and the switch action timing light are converted into a switch mechanical characteristic diagnosis result file according to a preset standard format.

[0047] For example, taking the switch opening diagnosis as an example, when the analysis finds that the time from the switch opening to the phase current disappearing is greater than the switch opening delay threshold set at 15 milliseconds, it indicates that there is a switch opening abnormality, and the data and analysis results are recorded in the switch mechanical characteristics diagnosis result file; taking the switch reignition and re-breakdown diagnosis as an example, when the switch is opened, an abnormal current pulse appears for a period of time after a phase current disappears, while other phases do not, it indicates that the switch may reignite or re-breakdown, and then a comprehensive analysis is performed on the occurrence time, peak amplitude, duration, etc. of the abnormal current pulse combined with the threshold; the data and analysis results are recorded in the switch mechanical characteristics diagnosis result file.

[0048] The method provided by the embodiment of the present invention further includes: performing diagnostic result file management on the switch mechanical characteristic diagnostic result file according to the deployment position of the switch mechanical characteristic diagnostic function.

[0049] Optionally, the deployment location of the switch mechanical characteristic diagnosis function includes at least one of the following: an intelligent recorder acquisition unit, an intelligent recorder management unit, a work computer for operation and maintenance personnel, and an intelligent recorder scheduling master station.

[0050] Specifically, the diagnosis result file management includes: file list maintenance, file transfer, file cycle overwriting and file parsing operations.

[0051] From the above description, it can be seen that the present invention provides a flexible diagnosis method for switch mechanical characteristics based on an intelligent recorder. By constructing a diagnostic parameter model for the mechanical characteristics of substation switches, the mechanical characteristics of substation switches can be diagnosed quickly and flexibly deployed, alleviating the technical problems of low work efficiency and difficulty in meeting the needs of rapid and flexible deployment in the prior art.

[0052] Embodiment 2

[0053] Figure 2 1 is a schematic diagram of a switch mechanical characteristic flexible diagnosis system based on an intelligent recorder according to an embodiment of the present invention, the system is applied to an intelligent recorder in a substation. Figure 2 As shown, it includes: an extraction module 10, a first construction module 20, a second construction module 30, a third construction module 40 and a diagnosis module 50.

[0054] Specifically, the extraction module 10 is used to exchange the waveform data in a universal format based on the transient data of the acquisition unit of the intelligent recorder, and extract the parameter information of the analog quantity channel, the switch quantity channel, the primary equipment or the bay of the substation;

[0055] A first construction module 20 is used to construct a channel parameter model of a switch mechanical characteristic diagnosis device based on analog channels, switch channels and parameter information;

[0056] A second construction module 30 is used to construct a switch mechanical characteristic diagnosis threshold parameter model based on a preset switch mechanical characteristic diagnosis threshold of the substation;

[0057] The third construction module 40 is used to integrate the switch mechanical characteristic diagnosis equipment channel parameter model and the switch mechanical characteristic diagnosis threshold parameter model, and add the substation site information to construct the substation switch mechanical characteristic diagnosis parameter model;

[0058] The diagnosis module 50 is used to perform switch mechanical characteristic diagnosis on the fault waveform data of the substation based on the switch mechanical characteristic diagnosis parameter model of the substation.

[0059] Specifically, the extraction module 10 is further used for:

[0060] Obtain configuration files and data model files in the transient data exchange universal format waveform data;

[0061] Extract parameter information of analog channels, switch channels, substation primary equipment or bays from configuration files and data model files.

[0062] Specifically, the first construction module 20 is also used to: integrate analog channel and parameter information, screen associated switch channels and configure associated switch attribute increments, and construct a switch mechanical characteristic diagnosis device channel parameter model; wherein,

[0063] The switch quantity channel screening includes: screening out switch quantity channels of types such as protection action, protection tripping, reclosing action, intelligent terminal phase breaker position, intelligent terminal circuit breaker total position, and intelligent terminal tripping and closing outlet recovery from the switch quantity channels;

[0064] The incremental configuration of switch quantity attributes includes: protection devices in dual configuration, intelligent terminal device association type attributes, side switches and middle switches in 3 / 2 wiring mode, and association attributes of each branch on the high-voltage side, medium-voltage side, and low-voltage side of the transformer.

[0065] Specifically, the diagnosis module 50 is further used for:

[0066] Analyze the fault waveform data to obtain the list of position-changing switch quantity channels;

[0067] Traverse the list of position-changing switch quantity channels, and select switches to be diagnosed that need mechanical characteristic diagnosis by comparing the mechanical characteristic diagnosis parameter model of the substation switch; the switches to be diagnosed are switches whose opening and closing positions have changed in the fault waveform data;

[0068] Based on the association relationship of the switches to be diagnosed, reading the analog channel data associated with the fault waveform data;

[0069] Based on the analog channel data, the switch action information to be diagnosed during the fault process is calculated; the switch action information to be diagnosed includes the time of the protection action signal, the time of the three-phase opening of the switch, the time when the fault phase current disappears, the time of the three-phase closing of the switch, the time when the phase current recovers after closing, and the negative sequence current and zero sequence current when the three phases are out of phase;

[0070] Based on the position change of the switch to be diagnosed and the action information of the switch to be diagnosed, a switch mechanical characteristic diagnosis result of the switch to be diagnosed is generated.

[0071] Specifically, an embodiment of the present invention provides a flexible switch mechanical characteristics diagnosis system based on an intelligent recorder, which is deployed at a substation and includes at least one of the following: an intelligent recorder acquisition unit, an intelligent recorder management unit, a work computer for operation and maintenance personnel, and an intelligent recorder dispatching master station.

[0072] From the above description, it can be seen that the embodiment of the present invention provides a flexible switch mechanical characteristics diagnosis system based on an intelligent recorder, which can be flexibly deployed to different scenarios such as the intelligent recorder acquisition unit, the intelligent recorder management unit, the work computer of the operation and maintenance personnel, and the intelligent recorder scheduling master station, so as to meet the usage requirements of different scenarios, solve the problems of inflexible deployment and low work efficiency of the intelligent recorder switch mechanical characteristics diagnosis function, and meet the needs of fast and flexible deployment.

[0073] The present invention further provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method in the above-mentioned embodiment 1 when executing the computer program.

[0074] The present invention also provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed by a processor, the method in the above-mentioned embodiment 1 is implemented.

[0075] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0076] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A flexible diagnosis method for switch mechanical characteristics based on an intelligent recorder, characterized in that: Intelligent recorder used in substations; including: Based on the transient data exchange universal format waveform data of the acquisition unit of the intelligent recorder, parameter information of analog channels, switch channels, substation primary equipment or bays is extracted; Based on the analog quantity channel, the switch quantity channel and the parameter information, a channel parameter model of a switch mechanical characteristic diagnosis device is constructed; Based on the preset switch mechanical characteristic diagnosis threshold of the substation, construct a switch mechanical characteristic diagnosis threshold parameter model; Integrate the switch mechanical characteristic diagnosis equipment channel parameter model and the switch mechanical characteristic diagnosis threshold parameter model, and add the substation site information to construct a substation switch mechanical characteristic diagnosis parameter model; Based on the substation switch mechanical characteristic diagnosis parameter model, the switch mechanical characteristic diagnosis is performed on the fault waveform data of the substation.

2. The method according to claim 1, characterized in that: Based on the transient data exchange universal format waveform data of the acquisition unit of the intelligent recorder, parameter information of analog channels, switch channels, substation primary equipment or bays is extracted, including: Obtaining a configuration file and a data model file in the transient data exchange universal format waveform data; Extract parameter information of analog quantity channels, switch quantity channels, substation primary equipment or bays from the configuration file and the data model file.

3. The method according to claim 1, characterized in that: Based on the analog quantity channel, the switch quantity channel and the parameter information, a switch mechanical characteristic diagnosis device channel parameter model is constructed, including: The analog quantity channel and the parameter information are integrated, the associated switch quantity channel is screened and the associated switch quantity attribute increment is configured to construct the channel parameter model of the switch mechanical characteristic diagnosis device; wherein, The switching channel screening includes: screening out the switching channels of the types of protection action, protection tripping, reclosing action, intelligent terminal phase breaker position, intelligent terminal circuit breaker total position, and intelligent terminal tripping and closing outlet recovery from the switching channels; The incremental configuration of switch quantity attributes includes: the association attributes of protection devices and intelligent terminal devices in dual configuration, the association attributes of side switches and middle switches in 3 / 2 wiring mode, and the association attributes of each branch on the high voltage side, medium voltage side, and low voltage side of the transformer.

4. The method according to claim 1, characterized in that: The preset switch mechanical characteristic diagnostic thresholds include: a delay threshold from fault occurrence to switch opening, a phase current disappearance threshold, a switch opening to phase current disappearance time, a switch closing delay threshold, a switch closing to phase current recovery time, a three-phase out-of-phase time, a maximum zero-sequence current, a maximum negative-sequence current, and a non-residual current peak threshold between contacts.

5. The method according to claim 1, characterized in that: The site information includes: substation voltage level, substation name, device model and version of the intelligent recorder.

6. The method according to claim 1, characterized in that: Based on the substation switch mechanical characteristic diagnosis parameter model, the substation fault waveform data is subjected to switch mechanical characteristic diagnosis, including: Analyze the fault waveform data to obtain a list of position-changing switch quantity channels; Traversing the position change switch quantity channel list, and screening out switches to be diagnosed that need to be diagnosed with mechanical characteristics by comparing the mechanical characteristics diagnosis parameter model of the substation switch; the switches to be diagnosed are switches whose opening and closing positions have changed in the fault waveform data; Based on the association relationship of the switches to be diagnosed, reading the analog channel data associated with the fault waveform data; According to the analog channel data, the switch action information to be diagnosed during the fault process is calculated; the switch action information to be diagnosed includes the time of the protection action signal, the time of the three-phase opening of the switch, the time when the fault phase current disappears, the time of the three-phase closing of the switch, the time when the phase current recovers after closing, and the negative sequence current and zero sequence current when the three phases are out of phase; A switch mechanical characteristic diagnosis result of the switch to be diagnosed is generated based on the position change of the switch to be diagnosed and the action information of the switch to be diagnosed.

7. A flexible diagnostic system for switch mechanical characteristics based on an intelligent recorder, characterized in that: An intelligent wave recorder applied to a substation; comprising: an extraction module, a first construction module, a second construction module, a third construction module and a diagnosis module; wherein, The extraction module is used to extract parameter information of analog channels, switch channels, substation primary equipment or bays based on the transient data exchange common format waveform data of the acquisition unit of the intelligent recorder; The first building module is used to build a channel parameter model of a switch mechanical characteristic diagnosis device based on the analog channel, the switch channel and the parameter information; The second construction module is used to construct a switch mechanical characteristic diagnosis threshold parameter model based on a preset switch mechanical characteristic diagnosis threshold of the substation; The third construction module is used to integrate the switch mechanical characteristic diagnosis equipment channel parameter model and the switch mechanical characteristic diagnosis threshold parameter model, and add the site information of the substation to construct the substation switch mechanical characteristic diagnosis parameter model; The diagnosis module is used to perform switch mechanical characteristic diagnosis on the fault waveform data of the substation based on the substation switch mechanical characteristic diagnosis parameter model.

8. The system according to claim 7, characterized in that: The diagnostic module is further used for: Analyze the fault waveform data to obtain a list of position-changing switch quantity channels; Traversing the position change switch quantity channel list, and screening out switches to be diagnosed that need to be diagnosed with mechanical characteristics by comparing the mechanical characteristics diagnosis parameter model of the substation switch; the switches to be diagnosed are switches whose opening and closing positions have changed in the fault waveform data; Based on the association relationship of the switches to be diagnosed, reading the analog channel data associated with the fault waveform data; According to the analog channel data, the switch action information to be diagnosed during the fault process is calculated; the switch action information to be diagnosed includes the time of the protection action signal, the time of the three-phase opening of the switch, the time when the fault phase current disappears, the time of the three-phase closing of the switch, the time when the phase current recovers after closing, and the negative sequence current and zero sequence current when the three phases are out of phase; A switch mechanical characteristic diagnosis result of the switch to be diagnosed is generated based on the position change of the switch to be diagnosed and the action information of the switch to be diagnosed.

9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 6 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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