A power distribution network protection device fault diagnosis method, device and equipment

Abstract

The application discloses a kind of power distribution network protection device fault diagnosis method, device and equipment.It includes: obtaining the fixed value image and message image of protection device photographed by camera;From fixed value image, extract fixed value item name and fixed value item value, and determine fixed value check result according to fixed value item name and fixed value item value;According to fixed value image and fixed value check result, determine the protection device function of protection device;According to protection device function and message image, output fault diagnosis result.Through extracting fixed value item name and fixed value item value from fixed value image photographed by camera, determine fixed value check result, without manual operation, can realize automatic check to fixed value, according to fixed value image and fixed value check result, determine the protection device function of protection device, and then according to protection device function and message image, output fault diagnosis result, improve the accuracy of diagnosis, save manpower while also improve fault diagnosis efficiency, protect the safety of power grid line.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power distribution network, and in particular to a power distribution network protection device fault diagnosis method, device and equipment. BACKGROUND

[0002] The safe and stable operation of the power grid is the premise and basis for realizing power supply reliability. As the first line of defense of the power system, the relay protection is one of the indispensable devices for ensuring the safe and stable operation of the power grid and equipment. A large number of relay protection devices are applied in various protection functions in power plants, substations and user power supply systems.

[0003] At present, when the fault diagnosis of the power distribution network protection device is performed, the staff often needs to check the protection device one by one on site, which not only consumes manpower but also reduces work efficiency. Moreover, once the setting value input or setting value modification of the protection device is wrong, it will cause the relay protection misoperation or refusal, and further affect the safety of the power grid line. SUMMARY

[0004] The present application provides a power distribution network protection device fault diagnosis method, device and equipment to realize the setting value checking and fault diagnosis of the power distribution network protection device.

[0005] According to an aspect of the present application, a power distribution network protection device fault diagnosis method is provided, which comprises:

[0006] Obtaining the setting value image and the message image of the protection device photographed by the camera;

[0007] Extracting the setting value item name and the setting value item value from the setting value image, and determining the setting value checking result according to the setting value item name and the setting value item value;

[0008] Determining the protection device function of the protection device according to the setting value image and the setting value checking result;

[0009] Outputting the fault diagnosis result according to the protection device function and the message image.

[0010] Optionally, the setting value checking result is determined according to the setting value item name and the setting value item value, which comprises: obtaining the setting value check sheet input by the input device, wherein the setting value check sheet comprises the check item name and the corresponding check item value of the protection device; matching the setting value item name with each check item name to determine the target name, and taking the check item value corresponding to the target name as the target value; judging whether the setting value item value is the same as the target value, if yes, determining that the setting value checking result is correct; otherwise, determining that the setting value checking result is incorrect.

[0011] Optionally, the protection device function of the protection device is determined according to the fixed value image and the fixed value check result, including: when the fixed value check result is that the fixed value check is correct, identifying a fixed value item field and a control field in the fixed value image, wherein the fixed value item field includes protection or automation, and the control field includes overcurrent I section input, primary reclosing input, sectional tie-in, and fault current criterion; and determining the protection device function of the protection device according to the fixed value item field and the control field, wherein the protection device function includes device using protection tripping and reclosing input, device using protection tripping and reclosing exit, device input protection alarm, switch input voltage time type section, switch input voltage current type section, and switch input logic tie-in.

[0012] Optionally, the protection device function of the protection device is determined according to the fixed value item field and the control field, including: when the fixed value item field is protection, determining the protection device function to be device using protection tripping and reclosing input, device using protection tripping and reclosing exit, or device input protection alarm according to the overcurrent I section input and the primary reclosing input; and when the fixed value item field is automation, determining the protection device function to be switch input voltage time type section, switch input voltage current type section, or switch input logic tie-in according to the sectional tie-in and the fault current criterion.

[0013] Optionally, the fault diagnosis result is output according to the protection device function and the message image, including: identifying the message image to extract message image text, wherein the message image text includes protection tripping information and switch power loss information; determining target message text from the message image text according to the protection device function; identifying each specified field in the target message text, and determining the fault diagnosis result according to each specified field and the protection device function, wherein the specified field includes switch opening, reclosing, reclosing time, switch closing, secondary protection tripping, reclosing lockout, loss-of-voltage opening, single loss-of-voltage opening time, switch power-on, switch power loss, residual voltage lockout, power-on closing, single power-on closing time, secondary power loss, and fault lockout.

[0014] Optionally, the target message text is determined from the message image text according to the protection device function, including: when the protection device function is device using protection tripping and reclosing input, device using protection tripping and reclosing exit, or device input protection alarm, the protection tripping information is taken as the target message text; and when the protection device function is switch input voltage time type section, switch input voltage current type section, or switch input logic tie-in, the switch power loss information is taken as the target message text.

[0015] Optionally, the method further includes: performing specified format conversion on the message image text to generate printed message text; and sending the generated printed message text to a printing device to enable the printing device to print the printed message text.

[0016] According to another aspect of the present application, there is provided a power distribution network protection device fault diagnosis device, comprising: an image acquisition module configured to acquire a setting value image and a message image of the protection device captured by a camera;

[0017] a setting value check result determination module configured to extract setting value item names and setting value item values from the setting value image, and determine a setting value check result according to the setting value item names and the setting value item values;

[0018] a protection device function determination module configured to determine a protection device function of the protection device according to the setting value image and the setting value check result;

[0019] a fault diagnosis result output module configured to output a fault diagnosis result according to the protection device function and the message image.

[0020] According to another aspect of the present application, there is provided an electronic device, comprising:

[0021] at least one processor; and

[0022] a memory connected to the at least one processor in communication; wherein,

[0023] the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to perform a power distribution network protection device fault diagnosis method according to any one of the embodiments of the present application.

[0024] According to another aspect of the present application, there is provided a computer readable storage medium storing computer instructions for enabling a processor to perform a power distribution network protection device fault diagnosis method according to any one of the embodiments of the present application when executed by the processor.

[0025] The technical solution of the embodiments of the present application determines a setting value check result by extracting setting value item names and setting value item values from a setting value image captured by a camera, and automatically checks the setting value without manual operation, determines a protection device function of the protection device according to the setting value image and the setting value check result, and then outputs a fault diagnosis result according to the protection device function and a message image, thereby improving the accuracy of diagnosis, saving manpower, improving the fault diagnosis efficiency, and ensuring the safety of the power grid line.

[0026] It should be understood that the content described in this section is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0028] Figure 1 is a flow chart of a power distribution network protection device fault diagnosis method according to the embodiment one of the present application;

[0029] Figure 2 is a flow chart of another power distribution network protection device fault diagnosis method according to the embodiment one of the present application;

[0030] Figure 3 is a protection device function determination process schematic diagram according to the embodiment one of the present application;

[0031] Figure 4 is a power distribution network protection device fault diagnosis system structure schematic diagram according to the embodiment one of the present application;

[0032] Figure 5 is a flow chart of another power distribution network protection device fault diagnosis method according to the embodiment two of the present application;

[0033] Figure 6 is a device using protection tripping and putting in reclosing fault diagnosis result determination process schematic diagram according to the embodiment two of the present application;

[0034] Figure 7 is a device using protection tripping and exiting reclosing fault diagnosis result determination process schematic diagram according to the embodiment two of the present application;

[0035] Figure 8 is a device putting in protection alarm fault diagnosis result determination process schematic diagram according to the embodiment two of the present application;

[0036] Figure 9 is a switch putting in voltage time type segmentation fault diagnosis result determination process schematic diagram according to the embodiment two of the present application;

[0037] Figure 10 is a switch putting in voltage current type segmentation fault diagnosis result determination process schematic diagram according to the embodiment two of the present application;

[0038] Figure 11 is a power distribution network protection device fault diagnosis device structure schematic diagram according to the embodiment three of the present application;

[0039] Figure 12It is a structural schematic diagram of an electronic device for realizing a power distribution network protection device fault diagnosis method according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to make the personnel in the technical field better understand the present application scheme, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0041] It should be noted that the terms "first", "first" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0042] Embodiment one

[0043] Figure 1 A flowchart of a power distribution network protection device fault diagnosis method is provided for the first embodiment of the present application. The present embodiment can be applicable to the setting value checking and fault diagnosis of the power distribution network protection device. The method can be executed by a power distribution network protection device fault diagnosis device, which can be realized in the form of hardware and / or software, and can be configured in a computer. As shown in the figure, the method comprises: Figure 1

[0044] S110, acquiring the setting value image and the message image of the protection device photographed by the camera.

[0045] The protection device refers to the protection and control device of each voltage level interval unit in the power grid line, which can guarantee the safe operation of high and low voltage power grids and plant power systems. The setting value is an important parameter for the logical judgment of the protection device, which determines the correctness of the protection device action. The setting value image and the message image can be photographed by the camera and then sent to the controller.

[0046] ​S120, extract the fixed value item name and the fixed value item value from the fixed value image, and determine the fixed value check result according to the fixed value item name and the fixed value item value.

[0047] Optionally, the fixed value check result is determined according to the fixed value item name and the fixed value item value, including: obtaining the fixed value check sheet input by the input device, wherein the fixed value check sheet includes the check item name of the protection device and the corresponding check item value; matching the fixed value item name with each check item name to determine the target name, and taking the check item value corresponding to the target name as the target value; judging whether the fixed value item value is same as the target value, if yes, determining that the fixed value check result is correct; otherwise, determining that the fixed value check result is incorrect.

[0048] Specifically, the controller can extract the fixed value item name and the fixed value item value from the fixed value image to determine the fixed value check result, and the user can input the fixed value check sheet through the input device, wherein the user refers to the worker who checks the protection device, and the input device can be a universal serial bus (USB) interface. The input fixed value check sheet includes the check item name of the protection device and the corresponding check item value, for example, the check item name is "overcurrent I section fixed value", and the corresponding check item value is "3A". Since the check item name corresponding to "overcurrent I section fixed value" in the message device of different manufacturers can be different, such as "overcurrent I section fixed value", "quick-break fixed value", and "phase-to-phase fault current I section fixed value", the controller pre-classifies the fixed value names with the same meaning.

[0049] Further, the controller can read the text content in the fixed value image picture through a text recognition algorithm, remove the fields irrelevant to the fixed value item (such as the text representing the current interface name, serial number, and page number), identify the fixed value item name, match the fixed value item name with each check item name to determine the target name, take the check item value corresponding to the target name as the target value, judge whether the fixed value item value is same as the target value, if yes, determine that the fixed value check result is correct; otherwise, determine that the fixed value check result is incorrect. In addition, the determined fixed value check result can be displayed on the display screen connected with the controller.

[0050] It should be noted that if the controller identifies a constant item name from the constant picture that cannot find a target name with the same meaning in the constant check sheet, the controller will prompt and record that there is a corresponding constant item name in the protection device but not in the constant check sheet. After all the constants in the protection device are identified and corrected, the user clicks to complete the shooting, and the controller checks whether all the constant items in the constant sheet have been compared. If there is a constant item that has not been identified and compared, the user is prompted to check again, and after confirming that there is no corresponding constant item in the device, the constant item in the constant sheet is recorded. The constant sheet has no corresponding constant item in the protection device. After all the above work is completed, the constant check report can be produced. The report contains the correction result of each constant. The report can be exported through the USB interface.

[0051] S130, determining the protection device function of the protection device according to the constant image and the constant check result.

[0052] Figure 2 A flowchart of a power distribution network protection device fault diagnosis method is provided for the embodiment of the present application. Step S130 mainly includes the following steps S131 to S132:

[0053] S131, when the constant check result is correct constant check, identifying the constant item field and the control field in the constant image.

[0054] The constant item field includes protection or automation, and the control field includes overcurrent I section input, primary reclosing input, sectionalizing tie-in, and fault current criterion.

[0055] S132, determining the protection device function of the protection device according to the constant item field and the control field.

[0056] The protection device function includes device using protection tripping and reclosing input, device using protection tripping and reclosing exit, device input protection alarm, switch input voltage time type section, switch input voltage current type section, and switch input logic tie-in.

[0057] Optionally, determining the protection device function of the protection device according to the constant item field and the control field includes: when the constant item field is protection, determining the protection device function according to the overcurrent I section input and the primary reclosing input to be device using protection tripping and reclosing input, device using protection tripping and reclosing exit, or device input protection alarm; and when the constant item field is automation, determining the protection device function according to the sectionalizing tie-in and the fault current criterion to be switch input voltage time type section, switch input voltage current type section, or switch input logic tie-in.

[0058] Specifically, Figure 3 A protection device function determination process schematic diagram is provided for the embodiment of the present application, as shown in Figure 3As shown, when the fixed value check result is correct, the controller acquires the fixed value item field and the control field, and then judges that the fixed value item field is protection or automation, when the fixed value item field is protection, further judges that the protection device is put into tripping or alarm according to the overcurrent I section input control field, when the protection device is put into alarm, it is determined that the protection device function is: device input protection alarm. When the protection device is put into tripping, it is judged whether the protection device is put into reclosing according to the primary reclosing input, when the protection device is put into reclosing, it is determined that the protection device function is: device uses protection tripping and puts into reclosing; when the protection device is not put into reclosing, it is determined that the protection device function is: device uses protection tripping and exits reclosing. When the fixed value item field is automation, further judge whether the protection device is put into section or tie according to the section tie, when the protection device is put into tie, it is determined that the protection device function is: switch input logical tie; when the protection device is put into section, it is judged whether the fault current criterion is put into, if yes, it is determined that the protection device function is: switch input voltage time type section; otherwise, it is determined that the protection device function is: switch input voltage current type section.

[0059] S140, outputting a fault diagnosis result according to the protection device function and the message image.

[0060] Specifically, the controller can identify the message image to generate a message image text, and then further judge the fault diagnosis result according to the message image text and the protection device function in which the protection device is located.

[0061] Optionally, the method further comprises: converting the message image text into a specified format to generate a printed message text; and sending the generated printed message text to a printing device to enable the printing device to print the printed message text.

[0062] Specifically, the message generally includes event occurrence time, event name, action or return (also indicated as 1 or 0 by some manufacturers), and the fault action message also includes action type, current value or voltage value. Due to the limited storage space of the protection device, the device will overwrite the old message, resulting in disorder of the message time sequence recorded in the device. Therefore, after the camera shoots the message image, the controller reads the text content in the message image through a text recognition algorithm, removes the fields irrelevant to the message (such as page number, number of rows, current interface name, etc.), and saves the message content in a set format and order. After all the messages are shot, the user can select a time range and print the messages in time sequence.

[0063] Further, Figure 4 A power distribution network protection device fault diagnosis system structure schematic diagram is provided for the embodiment of the application, Figure 4In the embodiment, the power distribution network protection device fault diagnosis system comprises a camera, a controller, a USB interface, a printing device and a display screen, and the arrow indicates the direction of data transmission. The camera is used to shoot the fixed value image and the message image, and send the shot fixed value image and the message image to the controller. The USB interface is used to input the fixed value check sheet, and send the fixed value check sheet to the controller. The controller determines the fixed value check result according to the fixed value image and the fixed value check sheet, and sends the fixed value check result to the display screen and the USB interface. The controller can output the printed message text according to the message image text, and send the printed message text to the printing device.

[0064] The technical scheme of the embodiment of the application determines the fixed value check result by extracting the fixed value item name and the fixed value item value from the fixed value image shot by the camera, and can automatically check the fixed value without manual operation. The protection device function of the protection device is determined according to the fixed value image and the fixed value check result, and then the fault diagnosis result is output according to the protection device function and the message image, thereby improving the accuracy of diagnosis, saving labor and improving the fault diagnosis efficiency, and ensuring the safety of the power grid line.

[0065] Embodiment two

[0066] Figure 5 A flowchart of a power distribution network protection device fault diagnosis method provided by the embodiment two of the application is shown in the figure. The embodiment adds a process of determining the fault diagnosis result on the basis of the above-mentioned embodiment one. The specific contents of steps S210-S230 are substantially the same as those of steps S110-S130 in the embodiment one, and therefore will not be described herein again. As shown in the figure, the method comprises the following steps. Figure 5

[0067] S210, acquiring the fixed value image and the message image of the protection device shot by the camera.

[0068] S220, extracting the fixed value item name and the fixed value item value from the fixed value image, and determining the fixed value check result according to the fixed value item name and the fixed value item value.

[0069] Optionally, determining the fixed value check result according to the fixed value item name and the fixed value item value comprises: acquiring the fixed value check sheet input by the input device, wherein the fixed value check sheet comprises the check item name of the protection device and the corresponding check item value; matching the fixed value item name with each check item name to determine the target name, and taking the check item value corresponding to the target name as the target value; judging whether the fixed value item value is the same as the target value, if yes, determining that the fixed value check result is correct; otherwise, determining that the fixed value check result is incorrect.

[0070] S230, determining the protection device function of the protection device according to the fixed value image and the fixed value check result. ​

[0071] S240, identifying the message image to extract message image text.

[0072] The message image text includes protection tripping information and switch loss of voltage information.

[0073] S250, determining target message text from the message image text according to the protection device function.

[0074] Optionally, determining the target message text from the message image text according to the protection device function includes: when the protection device function is device using protection tripping and putting in reclosing, device using protection tripping and exiting reclosing, or device putting in protection alarm, taking the protection tripping information as the target message text; when the protection device function is switch putting in voltage time type segmentation, switch putting in voltage current type segmentation, or switch putting in logical contact, taking the switch loss of voltage information as the target message text.

[0075] Specifically, different protection device functions correspond to different target message texts, and the controller will search in the message image text according to the protection device function to determine the target message text. When the protection device function is device using protection tripping and putting in reclosing, device using protection tripping and exiting reclosing, or device putting in protection alarm, the target message text is the protection tripping information; when the protection device function is switch putting in voltage time type segmentation, switch putting in voltage current type segmentation, or switch putting in logical contact, the target message text is the switch loss of voltage information.

[0076] S260, identifying each specified field in the target message text, and determining a fault diagnosis result according to each specified field and the protection device function.

[0077] The specified fields include switch opening, reclosing, reclosing time, switch closing, second protection tripping, reclosing locking, loss of voltage opening, single loss of voltage opening time, switch getting voltage, switch loss of voltage, residual voltage locking, getting voltage closing, single getting voltage closing time, second loss of voltage, and fault locking.

[0078] Specifically, Figure 6 A fault diagnosis result determination process schematic diagram when a device uses protection tripping and puts in reclosing is provided for the embodiment of the present application, as shown in Figure 6As shown in the figure, when the protection device function is device use protection trip and put in reclosing, the target message text is protection trip information, when the protection trip information is found, the diagnosis is triggered, the controller will judge whether there is a switch opening signal after the trip, if not, output the fault diagnosis result: switch refuses to act, please check the secondary circuit and switch body; if yes, judge whether there is a reclosing information, if not, output the fault diagnosis result: switch does not start reclosing, please check whether the reclosing function pressure plate is put in; if yes, judge whether the reclosing information and the protection trip information are separated by a constant value single reclosing time, if not, output the fault diagnosis result: reclosing time is incorrect, please check the protection device; if yes, judge whether there is a switch closing signal after reclosing, if not, output the fault diagnosis result: switch refuses to act, please check the secondary circuit and switch body; if yes, judge whether the switch protection trip occurs again in the reclosing reset time, if not, output the fault diagnosis result: switch correct action, reclosing success; if yes, judge whether there is a lockout reclosing message, if yes, output the fault diagnosis result: switch does not act correctly, protection reclosing fails; otherwise, output the fault diagnosis result: switch does not lock reclosing, please check the protection device.

[0079] Specifically, Figure 7 A device use protection trip and exit reclosing fault diagnosis result determination process schematic diagram is provided for the embodiment of the application, as shown in Figure 7 As shown in the figure, when the protection device function is device use protection trip and exit reclosing, the target message text is protection trip information, when the protection trip information is found, the diagnosis is triggered, the controller will judge whether there is a switch opening signal after the trip, if not, output the fault diagnosis result: switch refuses to act, please check the secondary circuit and switch body; if yes, judge whether there is a reclosing information, if yes, output the fault diagnosis result: switch misoperation, please check the protection device; otherwise, output the fault diagnosis result: switch misoperation, please check the protection device.

[0080] Specifically, Figure 8 A device put in protection alarm fault diagnosis result determination process schematic diagram is provided for the embodiment of the application, as shown in Figure 8 As shown in the figure, when the protection device function is device put in protection alarm, the target message text is protection trip information, when the protection trip information is found, the diagnosis is triggered, the controller will judge whether there is a switch opening signal after the trip, if yes, output the fault diagnosis result: switch misoperation, please check the protection device; otherwise, output the fault diagnosis result: switch correct warning.

[0081] Specifically, Figure 9 A switch put in voltage time type segmentation fault diagnosis result determination process schematic diagram is provided for the embodiment of the application, as shown in Figure 9When the protection device function is the switch input voltage time type section, the target message text is the switch power-off information, when the switch power-off information is found, the diagnosis is triggered, the controller judges whether there is pressure loss tripping information after power-off, if not, the fault diagnosis result is output: the device loses pressure after power-off, please check the protection device; if yes, judge whether the switch power-off to pressure loss tripping time is a fixed value single pressure loss tripping time, if not, output the fault diagnosis result: the device power-off tripping time is wrong, please check the protection device; if yes, judge whether the switch has switch tripping, if not, output the fault diagnosis result: switch refuses to act, please check the switch body and secondary circuit; if yes, judge whether there is switch power-on information after tripping, if not, output the fault diagnosis result: the switch acts correctly, the fault point is not in the front section of the switch; if yes, judge whether there is switch power-off information within the fixed value single power-on closing time after the switch power-on, if there is switch power-off information, judge whether the switch has residual voltage locking message, if yes, output the fault diagnosis result: the switch acts correctly, the line fault point is in the front section of the switch; otherwise, output the fault diagnosis result: the line fault point is in the front section of the switch, the device is not residual voltage locked, please check the protection device. If there is no switch power-off information, judge whether there is power-on closing information of the switch, if not, output the fault diagnosis result: the device is not closed after power-on, please check the protection device; if yes, judge whether the time interval from power-on to power-on closing is a fixed value single power-on closing time, if not, output the fault diagnosis result: the device power-on closing time is wrong, please check the protection device; if yes, judge whether the switch has switch closing, if not, output the fault diagnosis result: switch refuses to act, please check the switch body and secondary circuit; if yes, judge whether there is power-off again within the fault detection time after the switch closing, if not, output the fault diagnosis result: the switch acts correctly, the line fault point is not in the rear section of the switch; if yes, judge whether there is pressure loss tripping information after power-off, if not, output the fault diagnosis result: the device loses pressure after power-off, please check the protection device; if yes, judge whether there is closing to fault locking message, if yes, output the fault diagnosis result: the switch does not act correctly, the protection reclosing fails; otherwise, output the fault diagnosis result: the fault point is in the rear section of the switch, the device does not close to fault locking, please check the protection device.

[0082] Specifically, Figure 10 A switch input voltage current type section fault diagnosis result determination process schematic diagram is provided for the embodiment of the application, as shown in Figure 10When the protection device function is a switch input voltage current type section, the target message text is switch power loss information. When the switch power loss information is found, the diagnosis is triggered. The controller judges whether there is a loss of voltage tripping information after power loss. If not, the fault diagnosis result is that the device loses voltage tripping after power loss. Check the protection device. If yes, judge whether the switch power loss to loss of voltage tripping time is a fixed value single loss of voltage tripping time. If not, the fault diagnosis result is that the device power loss tripping time is wrong. Check the protection device. If yes, judge whether the switch has a switch tripping. If not, the fault diagnosis result is that the switch refuses to act. Check the switch body and secondary circuit. If yes, judge whether there is a switch power-on information after the switch tripping. If not, the fault diagnosis result is that the switch acts correctly. The fault point is not in the front section of the switch. If yes, judge whether there is a switch power loss information within the fixed value single power-on closing time after the switch power-on. If there is a switch power loss information, judge whether the switch has a residual voltage locking message. If yes, the fault diagnosis result is that the switch acts correctly. The line fault point is in the front section of the switch. Otherwise, the fault diagnosis result is that the line fault point is in the front section of the switch. The device has not residual voltage locking. Check the protection device. If there is no switch power loss information, judge whether the switch has a power-on closing information. If not, the fault diagnosis result is that the device has not closed after power-on. Check the protection device. If yes, judge whether the time interval from power-on to power-on closing is a fixed value single power-on closing time. If not, the fault diagnosis result is that the device power-on closing time is wrong. Check the protection device. If yes, judge whether the switch has a switch closing. If not, the fault diagnosis result is that the switch refuses to act. Check the switch body and secondary circuit. If yes, judge whether there is a power loss again within the fault detection time after the switch closing. If not, the fault diagnosis result is that the switch acts correctly. The line fault point is not in the rear section of the switch. If yes, judge whether the switch has a closing to fault locking message. If not, the fault diagnosis result is that the fault point is in the rear section of the switch. The device has not closed to fault locking. Check the protection device. If yes, the fault diagnosis result is that the switch acts correctly. The line fault point is in the rear section of the switch. When the closing to fault fast tripping is not put in, judge whether the device loses power again. If not, the fault diagnosis result is to check the front section circuit breaker switch. If yes, judge whether there is a power loss tripping information after power loss. If not, the fault diagnosis result is that the device loses voltage tripping after power loss. Check the protection device. If yes, judge whether the switch has a switch tripping. If not, the fault diagnosis result is that the switch refuses to act. Check the switch body and secondary circuit. If yes, judge whether the switch has a closing to fault locking message. If not, the fault diagnosis result is that the fault point is in the rear section of the switch. The device has not closed to fault locking. Check the protection device. If yes, the fault diagnosis result is that the switch acts correctly. The line fault point is in the rear section of the switch.

[0083] The technical scheme of the embodiment of the present application determines the fixed value check result by extracting the fixed value item name and the fixed value item value from the fixed value image shot by the camera, can realize automatic checking of the fixed value without manual operation, determines the protection device function of the protection device according to the fixed value image and the fixed value check result, further screens the message image text according to the protection device function, judges according to the specified field in the target message text, and can output the fault diagnosis result, thereby improving the diagnosis accuracy, saving the labor, improving the fault diagnosis efficiency, and ensuring the safety of the power grid line.

[0084] Embodiment three

[0085] Figure 11 A structural schematic diagram of a power distribution network protection device fault diagnosis device provided by the third embodiment of the present application is shown in FIG. 3. Figure 11 As shown in the figure, the device comprises: an image acquisition module 310, configured to acquire the fixed value image and the message image of the protection device shot by the camera; a fixed value check result determination module 320, configured to extract the fixed value item name and the fixed value item value from the fixed value image, and determine the fixed value check result according to the fixed value item name and the fixed value item value; a protection device function determination module 330, configured to determine the protection device function of the protection device according to the fixed value image and the fixed value check result; and a fault diagnosis result output module 340, configured to output the fault diagnosis result according to the protection device function and the message image.

[0086] Optionally, the fixed value check result determination module 320 specifically comprises: a fixed value check result determination unit, configured to: acquire the fixed value check sheet input by the input device, wherein the fixed value check sheet comprises the check item name and the corresponding check item value of the protection device; match the fixed value item name with each check item name to determine the target name, and take the check item value corresponding to the target name as the target value; and judge whether the fixed value item value is the same as the target value, if yes, determine that the fixed value check result is correct; otherwise, determine that the fixed value check result is incorrect.

[0087] Optionally, the protection device function determination module 330 specifically comprises: a field identification unit, configured to identify the fixed value item field and the control field in the fixed value image when the fixed value check result is correct, wherein the fixed value item field comprises protection or automation, and the control field comprises overcurrent I section input, primary reclosing input, sectionalization and contact to fault current criterion; and a protection device function determination unit, configured to determine the protection device function of the protection device according to the fixed value item field and the control field, wherein the protection device function comprises device using protection tripping and inputting reclosing, device using protection tripping and exiting reclosing, device inputting protection alarm, switch inputting voltage time sectionalization, switch inputting voltage current sectionalization, and switch inputting logic contact.

[0088] Optionally, the protection device function determination unit is specifically configured to: when the fixed value item field is protection, determining the protection device function as device using protection tripping and inputting reclosing, device using protection tripping and exiting reclosing, or device inputting protection alarm according to overcurrent I section input and primary reclosing input; and when the fixed value item field is automation, determining the protection device function as switch input voltage time type section, switch input voltage current type section, or switch input logic connection according to section connection and fault current criterion.

[0089] Optionally, the fault diagnosis result output module 340 specifically comprises: a message image text extraction unit configured to identify the message image to extract message image text, wherein the message image text comprises protection tripping information and switch power loss information; a target message text determination unit configured to determine target message text from the message image text according to the protection device function; and a fault diagnosis result determination unit configured to identify each specified field in the target message text, and determine the fault diagnosis result according to each specified field and the protection device function, wherein the specified field comprises switch opening, reclosing, reclosing time, switch closing, secondary protection tripping, reclosing locking, voltage loss opening, single voltage loss opening time, switch power-on, switch power loss, residual voltage locking, power-on closing, single power-on closing time, secondary power loss, and fault locking.

[0090] Optionally, the target message text determination unit is specifically configured to: when the protection device function is device using protection tripping and inputting reclosing, device using protection tripping and exiting reclosing, or device inputting protection alarm, taking the protection tripping information as the target message text; and when the protection device function is switch input voltage time type section, switch input voltage current type section, or switch input logic connection, taking the switch power loss information as the target message text.

[0091] Optionally, the device further comprises: a message printing module configured to convert the message image text into a printed message text in a specified format, and send the generated printed message text to a printing device to enable the printing device to print the printed message text.

[0092] The technical scheme of the embodiment of the application determines the fixed value check result by extracting the fixed value item name and the fixed value item value from the fixed value image captured by the camera, and can automatically check the fixed value without manual operation, determines the protection device function of the protection device according to the fixed value image and the fixed value check result, and then outputs the fault diagnosis result according to the protection device function and the message image, thereby improving the accuracy of diagnosis, saving manpower, improving the fault diagnosis efficiency, and ensuring the safety of the power grid line.

[0093] The power distribution network protection device fault diagnosis device provided by the embodiment of the present application can execute the power distribution network protection device fault diagnosis method provided by any embodiment of the present application, and has the corresponding function modules and beneficial effects of the execution method.

[0094] Embodiment four

[0095] Figure 12 A structural schematic diagram of an electronic device 10 that can be used to implement embodiments of the present application is shown. The electronic device is intended to represent various forms of digital computers, such as laptops, desktops, tablets, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular telephones, smart phones, wearable devices (e.g., headsets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be examples only, and are not meant to limit implementations of the present application described and / or claimed in this document.

[0096] As shown in Figure 12 The electronic device 10 includes at least one processor 11, and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., which is communicatively connected to the at least one processor 11, wherein the memory stores a computer program that can be executed by the at least one processor. The processor 11 can execute various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0097] A plurality of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, a loudspeaker, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunication networks.

[0098] The processor 11 can be various general and / or special purpose processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, and the like. The processor 11 performs various methods and processes described above, such as a power distribution network protection device fault diagnosis method.

[0099] In some embodiments, a power distribution network protection device fault diagnosis method can be implemented as a computer program tangibly embodied in a computer readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program can be loaded onto and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded onto the RAM 13 and executed by the processor 11, one or more steps of a power distribution network protection device fault diagnosis method described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to perform a power distribution network protection device fault diagnosis method by any other suitable means, such as by means of firmware.

[0100] Various implementations of the systems and techniques described above can be realized in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a programmable logic device (PLD), a computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0101] Computer programs used to implement the methods of the application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the computer program, when executed, implements the functions / acts specified in the flowcharts and / or block diagrams. The computer program can be executed entirely on a machine, partially on a machine, partially on a machine as a stand-alone software package, and partially on a machine or a remote machine or a server.

[0102] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer-readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of a machine-readable storage medium will include one or more lines of a program of instructions in a transitory signal, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0103] To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0104] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), blockchain network, and the Internet.

[0105] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0106] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, each step described in the present application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which is not limited herein.

[0107] The above detailed description does not constitute a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A fault diagnosis method for power distribution network protection devices, characterized in that, include: Acquire the setpoint images and message images of the protection device captured by the camera; Extract the name and value of the fixed value item from the fixed value image, and determine the fixed value verification result based on the name and value of the fixed value item; The protection device function of the protection device is determined based on the set value image and the set value verification result; Based on the function of the protection device and the message image, output the fault diagnosis result; The step of determining the setting value verification result based on the setting value item name and the setting value item value includes: The setpoint checklist input by the input device is obtained, wherein the setpoint checklist includes the check item name and the corresponding check item value of the protection device; The name of the fixed value item is matched with the name of each of the inspection items to determine the target name, and the value of the inspection item corresponding to the target name is taken as the target value; Determine whether the value of the fixed value item is the same as the target value. If so, determine that the value verification result is correct. Otherwise, the result of the value verification is determined to be a value verification error; The step of determining the protection device function based on the setpoint image and the setpoint verification result includes: When the setting value verification result is that the setting value verification is correct, the setting value item field and control field in the setting value image are identified. The setting value item field includes protection or automation, and the control field includes overcurrent stage I activation, primary reclosing activation, sectional connection, and fault current criterion. The protection device function is determined based on the set value field and the control field, wherein the protection device function includes the device using protection trip and enabling reclosing, the device using protection trip and disabling reclosing, the device enabling protection alarm, the switch enabling voltage-time type segmentation, the switch enabling voltage-current type segmentation, and the switch enabling logic connection.

2. The method according to claim 1, characterized in that, Determining the protection device function based on the setpoint field and the control field includes: When the setting field is protection, the function of the protection device is determined according to the overcurrent I stage activation and the primary reclosing activation: the device uses protection to trip and activate reclosing, the device uses protection to trip and deactivate reclosing, or the device activates protection alarm. When the set value field is automated, the function of the protection device is determined to be switch-on voltage time-type segmentation, switch-on voltage current-type segmentation, or switch-on logic connection based on the segmented connection and the combined fault current criterion.

3. The method according to claim 2, characterized in that, The step of outputting fault diagnosis results based on the function of the protection device and the message image includes: The message image is identified to extract the message image text, wherein the message image text includes protection trip information and switch power failure information; The target message text is determined from the message image text according to the function of the protection device; Identify each specified field in the target message text, and determine the fault diagnosis result based on each specified field and the function of the protection device. The specified fields include switch opening, reclosing, reclosing time, switch closing, protection tripping again, reclosing lockout, undervoltage opening, single undervoltage opening time, switch energization, switch de-energization, residual voltage lockout, energized closing, single energized closing time, re-de-energization, and fault lockout.

4. The method according to claim 3, characterized in that, Determining the target message text from the message image text based on the function of the protection device includes: When the protection device functions as follows: the device trips and engages reclosing, the device trips and disengages from reclosing, or the device activates a protection alarm, the protection trip information is used as the target message text. When the protection device functions as a switch-on voltage time-type segmentation, a switch-on voltage current-type segmentation, or a switch-on logic connection, the switch power failure information is used as the target message text.

5. The method according to claim 3, characterized in that, The method further includes: The message image text is converted to a specified format to generate a printable message text; The generated print message text is sent to the printing device so that the printing device can print the print message text.

6. A fault diagnosis device for power distribution network protection devices, characterized in that, include: The image acquisition module is used to acquire the setpoint images and message images of the protection device captured by the camera; The fixed value verification result determination module is used to extract the fixed value item name and fixed value item value from the fixed value image, and determine the fixed value verification result based on the fixed value item name and the fixed value item value; A protection device function determination module is used to determine the protection device function of the protection device based on the setpoint image and the setpoint verification result. The fault diagnosis result output module is used to output fault diagnosis results based on the function of the protection device and the message image; The setting value verification result determination module specifically includes: a setting value verification result determination unit, used to: obtain the setting value check sheet input by the input device, wherein the setting value check sheet includes the check item name and corresponding check item value of the protection device; The name of the fixed value item is matched with the name of each of the inspection items to determine the target name, and the value of the inspection item corresponding to the target name is taken as the target value; Determine whether the value of the fixed value item is the same as the target value. If so, determine that the value verification result is correct. Otherwise, the result of the value verification is determined to be a value verification error; The protection device function determination module specifically includes: a field identification unit, used to identify the setting item field and control field in the setting image when the setting value verification result is that the setting value verification is correct. The setting item field includes protection or automation, and the control field includes overcurrent stage I activation, primary reclosing activation, segmented connection, and fault current judgment criteria. The protection device function determination unit is used to determine the protection device function of the protection device based on the setting item field and the control field. The protection device function includes the device using protection tripping and reclosing, the device using protection tripping and reclosing, the device using protection alarm, the switch using voltage time-type segmentation, the switch using voltage current-type segmentation, and the switch using logic connection.

7. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-5.

8. A computer storage medium, characterized in that, The computer storage medium stores computer instructions that are used to cause a processor to execute the method of any one of claims 1-5.

Images