Automatic fault studying and judging method and system based on distribution network SOE information

Abstract

The invention relates to an automatic fault studying and judging method and system based on distribution network SOE information, and belongs to the technical field of power system fault diagnosis. The method comprises the steps of single line diagram analysis, SOE data analysis, data mapping, fault studying and judging rule making, fault studying, judging and positioning and fault positioning information output. According to the technical scheme, through innovative application of the image-text data technology, automatic and intelligent upgrading of power grid equipment fault research and judgment is achieved, the efficiency and accuracy of power grid operation and maintenance are effectively improved, and new power is injected to intelligent development of the power industry.

Description

Technical Field

[0001] The present invention belongs to the technical field of power system fault diagnosis, and in particular relates to a method and system for automatic fault analysis based on distribution network SOE (Sequence of Events) information. Background Art

[0002] SOE (Sequence of Events) fault information analysis is an important technology in power systems, mainly used for fault diagnosis, system recovery and prevention of future faults.

[0003] In the power system, the single-line diagram (SLD) is a simplified drawing that shows the electrical connection and layout of the main equipment in the power system. It plays a key role in maintenance, troubleshooting and system configuration changes. The SOE recording system is used to record the chronological order of equipment status changes and is an important basis for equipment system failure and abnormality analysis. Existing fault analysis methods often rely on manual comparison of single-line diagrams and SOE data for analysis, which is inefficient and prone to errors. At the same time, SOE information is not fully utilized and cannot fully play its role in fault diagnosis; and there is a lack of effective automated fault analysis methods.

[0004] Therefore, it is of great significance to overcome the shortcomings of the existing technology and develop a method and system that can automatically analyze the single-line diagram and combine SOE data for fault analysis. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies of the prior art and to provide a method and system for automatic fault analysis based on distribution network SOE information.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A method for automatic fault analysis based on distribution network SOE information includes the following steps:

[0008] Step (1), single-line diagram analysis: collect the single-line diagram file, analyze it, and extract the basic information of the equipment; wherein the basic information of the equipment includes the equipment type, name, and coordinate point position relationship;

[0009] Then, the devices whose device types are lines and switches are selected; the traversal search method is used to sort out the order of the devices according to the starting relationship of the coordinate points; then, the switch devices and the lines between them are visualized;

[0010] Step (2), SOE data analysis: obtain the distribution network SOE fault alarm information, and clean the SOE fault alarm information to remove invalid and redundant information; then, parse the SOE fault alarm information into device information, point table information, action type, and SOE time field, and then filter out the signals of opening, closing, and locking from the point table information, and the action type is opening, closing, and action; the device information is named as "line name + tower name + switch name";

[0011] Step (3), data mapping: unify the device name of the single-line diagram and the device name of the SOE, and then establish a mapping relationship between the single-line diagram device and the SOE data;

[0012] Step (4), fault analysis rules are formulated: the equipment action sequence complies with the sequence of precedence and follow-up, the protection signal comes first and then the action signal, and the fault occurs after the forward lockout and before the reverse lockout signal;

[0013] Step (5), fault analysis and location: sort the analyzed SOE data in chronological order;

[0014] According to the opening and closing action sequence rules of the equipment, check the lack of switch signals and disordered action implementation sequence; verify the corresponding relationship between protection signals and action signals. Before the opening action signal, there is a protection signal that explains the action reason. Opening first and then closing. If this sequence is not met, it is determined to be abnormal opening and closing;

[0015] Locate the forward blocking and reverse blocking signals and determine whether the abnormal device is between the two signals;

[0016] When there is no closing signal after the switch is opened, or there is no opening signal before closing, the device is directly located as an abnormal switch device; otherwise, fuzzy fault location is performed, and the fault location information is output as the rear section of the forward locking signal device, the front section of the reverse locking signal device, or between the forward locking device and the reverse device signal device;

[0017] Step (6), fault location information output: output a fault report, the fault report includes fault location information, and the fault location information includes the name of the abnormal device, the fault type, and the fault location.

[0018] Furthermore, preferably, in step (1), single-line diagram files in SVG format and XML format are collected and preprocessed, and the preprocessing includes eliminating incomplete files, files with inconsistent lines corresponding to SVG and XML, eliminating unclear files, and parsing the equipment and coordinate information in the files for storage in a unified format.

[0019] Further, preferably, in step (1), when visualizing the switch devices and the lines therebetween, for the missing lines, a line completion method is applied to automatically complete the adjacent endpoints through line segments according to the coordinate endpoints of the devices, to supplement the missing line connection points, and to connect the devices in series;

[0020] Then the line scale is adjusted using the scaling method to ensure that the user can fully browse the switchgear under the entire substation on one screen.

[0021] Furthermore, preferably, in step (2), distribution network SOE fault alarm information is obtained from the substation SCADA system.

[0022] Furthermore, preferably, in step (2), the device information includes voltage level, line name and switch name.

[0023] Furthermore, preferably, in step (3), the device name of the single-line diagram and the device name of the SOE are unified into line name+tower name+switch name.

[0024] Furthermore, preferably, in step (6), when the fault location information is output, a circuit diagram containing only circuits and switches is displayed, abnormal equipment is marked on the diagram, and a fault report is displayed.

[0025] Furthermore, preferably, in step (6), the fault types include abnormal action sequence, missing signal, and abnormal opening and closing.

[0026] The present invention also provides a fault automatic analysis system based on distribution network SOE information, including:

[0027] The single-line diagram parsing module is used to collect single-line diagram files, parse them, and extract basic information of the equipment; the basic information of the equipment includes equipment type, name, and coordinate point position relationship;

[0028] Then, the devices with line and switch types are selected; the traversal search method is used to sort out the order of the devices according to the starting relationship of the coordinate points; then, the switch devices and the lines between them are visualized;

[0029] The SOE data parsing module is used to obtain the distribution network SOE fault alarm information and clean the SOE fault alarm information to remove invalid and redundant information; then, the SOE fault alarm information is parsed into equipment information, point table information, action type, and SOE time field, and then the signals of opening, closing, and locking, and the action type of opening, closing, and action are filtered out from the point table information; the equipment information is named as "line name + tower name + switch name";

[0030] The data mapping module is used to unify the device names of the single-line diagram and the SOE device names, and then establish the mapping relationship between the single-line diagram devices and the SOE data;

[0031] The fault analysis rule formulation module is used to ensure that the equipment action sequence complies with the sequence of the protection signal first and then the action signal, and the fault occurs after the forward blocking signal and before the reverse blocking signal;

[0032] The fault analysis and location module is used to sort the analyzed SOE data in chronological order;

[0033] According to the opening and closing action sequence rules of the equipment, check the lack of switch signals and disordered action implementation sequence; verify the corresponding relationship between protection signals and action signals. Before the opening action signal, there is a protection signal that explains the action reason. Opening first and then closing. If this sequence is not met, it is determined to be abnormal opening and closing;

[0034] Locate the forward blocking and reverse blocking signals and determine whether the abnormal device is between the two signals;

[0035] When there is no closing signal after the switch is opened, or there is no opening signal before closing, the device is directly located as an abnormal switch device; otherwise, fuzzy fault location is performed, and the fault location information is output as the rear section of the forward locking signal device, the front section of the reverse locking signal device, or between the forward locking device and the reverse device signal device;

[0036] The fault location information output module is used to output a fault report, which includes fault location information. The fault location information includes the name of the abnormal device, the fault type, and the fault location.

[0037] The present invention provides a method and system for automatic fault analysis based on SOE information, which analyzes a single-line diagram to generate a switch diagram, and combines SOE fault data to achieve rapid and accurate diagnosis of power system faults.

[0038] The innovation of the present invention is:

[0039] 1. Coordinate point relationship sorting: The present invention uses an efficient traversal search algorithm to accurately sort out the order of equipment, especially for lines and switchgear. This method has significant advantages in dealing with complex power grid structures.

[0040] 2. Visual presentation and interpolation completion: Advanced web canvas technology is used to achieve visualization, and adjacent line interpolation method is applied to supplement the missing line connection points to ensure the accuracy and completeness of line connections. This is the first time in similar technical solutions.

[0041] 3. Keyword screening and unified format: The present invention uses a keyword screening scheme to accurately screen out key signals from a large amount of SOE data and unify the data format, providing a reliable data basis for subsequent fault analysis.

[0042] 4. Signal classification and verification: Classify the signals according to the action type and verify the correspondence between the protection signal and the action signal. This step ensures the accuracy of fault analysis.

[0043] 5. Unification of equipment names and establishment of mapping relationships: The present invention establishes accurate data mapping relationships by completing and unifying the single-line diagram equipment names and SOE equipment naming methods. This method has extremely high flexibility when processing equipment with different naming rules.

[0044] 6. Rule formulation and automated analysis: The present invention formulates clear rules for the sequence of equipment actions and fault judgment, and realizes automated analysis. This method can significantly improve the efficiency of analysis when processing large-scale power grid data.

[0045] 7. Visual positioning and result output: The switch diagram is presented on the visual interface, and abnormal equipment and fault reports are marked. At the same time, an intuitive display of fault analysis results is provided. This step enhances the user experience and the convenience of fault handling.

[0046] As the speed of power grid operation continues to increase, the power industry is actively exploring more efficient and intelligent operation and maintenance management methods. The technical solution of the present invention provides an innovative solution for the automated analysis of equipment failures by deeply integrating graphic data technology. Specifically, the solution can integrate and analyze the sequential relationship between single-line diagram devices, while accurately capturing the equipment and action information in SOE (Sequence of Events) alarm data. On this basis, we have constructed a sophisticated mapping relationship model that can accurately reflect the logical and physical connections between power grid devices.

[0047] Furthermore, the technical solution of the present invention introduces an advanced fault rule base (i.e., the corresponding relevant judgments in step 4 and step 5), which is based on a large amount of actual operation data and expert experience and can cover various common power grid fault scenarios. By combining the mapping relationship model with the fault rule base, we can realize the automation and intelligence of fault analysis. When a power grid fails, the system can quickly locate the fault point, and according to the corresponding rules in the rule base, automatically deduce the possible cause and impact range of the fault, and provide timely and accurate fault information for operation and maintenance personnel.

[0048] In summary, the technical solution of the present invention realizes the automation and intelligent upgrading of power grid equipment fault analysis through the innovative application of graphic data technology, effectively improves the efficiency and accuracy of power grid operation and maintenance, and injects new impetus into the intelligent development of the power industry.

[0049] In the present invention, fuzzy fault location is performed, and the fault location information output is the rear section of the forward locking signal device, the front section of the reverse locking signal device, or between the forward locking device and the reverse device signal device; that is, it is achieved by locating the forward locking and reverse locking signals and judging whether the abnormal device is between the two signals. These three situations can be judged in turn.

[0050] In step (1) of the present invention, software technology is used to generate a single-line diagram through a web page using a graphics algorithm to visualize the switchgear and the lines therebetween.

[0051] When the present invention performs fuzzy positioning, the name of the abnormal device in the fault report only shows the device positioned as the device between the forward locking signal device and the reverse locking signal device, and cannot be specifically evaluated as a certain device.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] (1) Improves the accuracy of fault diagnosis and reduces misdiagnosis caused by human factors;

[0054] (2) It realizes the automation of fault analysis and improves the efficiency of fault handling;

[0055] (3) Replace the current single SOE judgment method, integrate the single line diagram and SOE data into one, and make fault judgment more accurate and effective. In the past, when a fault occurred, it was necessary to manually download data to find the cause of the fault, compare the equipment one by one on the system, and then manually analyze the SOE data to check and find one by one. It took more than 2 hours to check a single line fault. After adopting this method, it can be quickly located in 5 minutes. The efficiency of single line fault troubleshooting is improved by more than 20 times;

[0056] (4) Taking advantage of SOE information, giving full play to its role in fault diagnosis, BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a structural diagram of the automatic fault analysis system based on distribution network SOE information of the present invention; wherein the arrows represent the direction of data or signals;

[0058] Figure 2 Logic diagram for judging abnormal action sequence, missing signal, and abnormal opening and closing;

[0059] Figure 3Analyze the fault analysis and location results for the application example;

[0060] Figure 4 This is a schematic diagram showing the output of fault location information for an application example. DETAILED DESCRIPTION

[0061] The present invention is further described in detail below in conjunction with embodiments.

[0062] Those skilled in the art will appreciate that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the art or the product specifications are used. If the manufacturer of the materials or equipment used is not specified, they are all conventional products that can be purchased.

[0063] Example 1

[0064] A method for automatic fault analysis based on distribution network SOE information includes the following steps:

[0065] Step (1), single-line diagram analysis: collect the single-line diagram file, analyze it, and extract the basic information of the equipment; wherein the basic information of the equipment includes the equipment type, name, and coordinate point position relationship;

[0066] Then, the devices with line and switch types are selected; the traversal search method is used to sort out the order of the devices according to the starting relationship of the coordinate points; then, the switch devices and the lines between them are visualized;

[0067] Step (2), SOE data analysis: obtain the distribution network SOE fault alarm information, and clean the SOE fault alarm information to remove invalid and redundant information; then, parse the SOE fault alarm information into device information, point table information, action type, and SOE time field, and then filter out the signals of opening, closing, and locking from the point table information, and the action type is opening, closing, and action; the device information is named as "line name + tower name + switch name";

[0068] Step (3), data mapping: unify the device name of the single-line diagram and the device name of the SOE, and then establish a mapping relationship between the single-line diagram device and the SOE data;

[0069] Step (4), fault analysis rules are formulated: the equipment action sequence complies with the sequence of precedence and follow-up, the protection signal comes first and then the action signal, and the fault occurs after the forward lockout and before the reverse lockout signal;

[0070] Step (5), fault analysis and location: sort the analyzed SOE data in chronological order;

[0071] According to the opening and closing action sequence rules of the equipment, check the lack of switch signals and disordered action implementation sequence; verify the corresponding relationship between protection signals and action signals. Before the opening action signal, there is a protection signal that explains the action reason. Opening first and then closing. If this sequence is not met, it is determined to be abnormal opening and closing;

[0072] Locate the forward blocking and reverse blocking signals and determine whether the abnormal device is between the two signals;

[0073] When there is no closing signal after the switch is opened, or there is no opening signal before closing, the device is directly located as an abnormal switch device; otherwise, fuzzy fault location is performed, and the fault location information is output as the rear section of the forward locking signal device, the front section of the reverse locking signal device, or between the forward locking device and the reverse device signal device;

[0074] Step (6), fault location information output: output a fault report, the fault report includes fault location information, and the fault location information includes the name of the abnormal device, the fault type, and the fault location.

[0075] like Figure 1 As shown, a fault automatic analysis system based on distribution network SOE information adopts the fault automatic analysis method based on distribution network SOE information of this embodiment, including:

[0076] The single-line diagram parsing module is used to collect single-line diagram files, parse them, and extract basic information of the equipment; the basic information of the equipment includes equipment type, name, and coordinate point position relationship;

[0077] Then, the devices with line and switch types are selected; the traversal search method is used to sort out the order of the devices according to the starting relationship of the coordinate points; then, the switch devices and the lines between them are visualized;

[0078] The SOE data parsing module is used to obtain the distribution network SOE fault alarm information and clean the SOE fault alarm information to remove invalid and redundant information; then, the SOE fault alarm information is parsed into equipment information, point table information, action type, and SOE time field, and then the signals of opening, closing, and locking, and the action type of opening, closing, and action are filtered out from the point table information; the equipment information is named as "line name + tower name + switch name";

[0079] The data mapping module is used to unify the device names of the single-line diagram and the SOE device names, and then establish the mapping relationship between the single-line diagram devices and the SOE data;

[0080] The fault analysis rule formulation module is used to ensure that the equipment action sequence complies with the sequence of the protection signal first and then the action signal, and the fault occurs after the forward blocking signal and before the reverse blocking signal;

[0081] The fault analysis and location module is used to sort the analyzed SOE data in chronological order;

[0082] According to the opening and closing action sequence rules of the equipment, check the lack of switch signals and disordered action implementation sequence; verify the corresponding relationship between protection signals and action signals. Before the opening action signal, there is a protection signal that explains the action reason. Opening first and then closing. If this sequence is not met, it is determined to be abnormal opening and closing;

[0083] Locate the forward blocking and reverse blocking signals and determine whether the abnormal device is between the two signals;

[0084] When there is no closing signal after the switch is opened, or there is no opening signal before closing, the device is directly located as an abnormal switch device; otherwise, fuzzy fault location is performed, and the fault location information is output as the rear section of the forward locking signal device, the front section of the reverse locking signal device, or between the forward locking device and the reverse device signal device;

[0085] The fault location information output module is used to output a fault report, which includes fault location information. The fault location information includes the name of the abnormal device, the fault type, and the fault location.

[0086] Example 2

[0087] A method for automatic fault analysis based on distribution network SOE information includes the following steps:

[0088] Step (1), single-line diagram analysis: collect the single-line diagram file, analyze it, and extract the basic information of the equipment; wherein the basic information of the equipment includes the equipment type, name, and coordinate point position relationship;

[0089] Then, the devices with line and switch types are selected; the traversal search method is used to sort out the order of the devices according to the starting relationship of the coordinate points; then, the switch devices and the lines between them are visualized;

[0090] Step (2), SOE data analysis: obtain the distribution network SOE fault alarm information, and clean the SOE fault alarm information to remove invalid and redundant information; then, parse the SOE fault alarm information into device information, point table information, action type, and SOE time field, and then filter out the signals of opening, closing, and locking from the point table information, and the action type is opening, closing, and action; the device information is named as "line name + tower name + switch name";

[0091] Step (3), data mapping: unify the device name of the single-line diagram and the device name of the SOE, and then establish a mapping relationship between the single-line diagram device and the SOE data;

[0092] Step (4), fault analysis rules are formulated: the equipment action sequence complies with the sequence of precedence and follow-up, the protection signal comes first and then the action signal, and the fault occurs after the forward lockout and before the reverse lockout signal;

[0093] Step (5), fault analysis and location: sort the analyzed SOE data in chronological order;

[0094] According to the opening and closing action sequence rules of the equipment, check the lack of switch signals and disordered action implementation sequence; verify the corresponding relationship between protection signals and action signals. Before the opening action signal, there is a protection signal that explains the action reason. Opening first and then closing. If this sequence is not met, it is determined to be abnormal opening and closing;

[0095] Locate the forward blocking and reverse blocking signals and determine whether the abnormal device is between the two signals;

[0096] When there is no closing signal after the switch is opened, or there is no opening signal before closing, the device is directly located as an abnormal switch device; otherwise, fuzzy fault location is performed, and the fault location information is output as the rear section of the forward locking signal device, the front section of the reverse locking signal device, or between the forward locking device and the reverse device signal device;

[0097] Step (6), fault location information output: output a fault report, the fault report includes fault location information, and the fault location information includes the name of the abnormal device, the fault type, and the fault location.

[0098] In step (1), single-line diagram files in SVG format and XML format are collected and preprocessed. The preprocessing includes eliminating incomplete files, files with inconsistent lines between SVG and XML, eliminating unclear files, and parsing the equipment and coordinate information in the files for storage in a unified format.

[0099] In step (1), when the switch devices and the lines therebetween are visualized, for the missing lines, a line completion method is applied to automatically complete the adjacent endpoints through line segments according to the coordinate endpoints of the devices, to supplement the missing line connection points, and to connect the devices in series;

[0100] Then the line scale is adjusted using the scaling method to ensure that the user can fully browse the switchgear under the entire substation on one screen.

[0101] In step (2), the distribution network SOE fault alarm information is obtained from the substation SCADA system.

[0102] In step (2), the device information includes voltage level, line name and switch name.

[0103] In step (3), the device name of the single-line diagram and the device name of the SOE are unified into line name + tower name + switch name.

[0104] In step (6), when the fault location information is output, a circuit diagram containing only circuits and switches is displayed, abnormal equipment is marked on the diagram, and a fault report is displayed.

[0105] In step (6), the fault types include abnormal action sequence, missing signal, and abnormal opening and closing.

[0106] like Figure 1 As shown, a fault automatic analysis system based on distribution network SOE information adopts the fault automatic analysis method based on distribution network SOE information of this embodiment, including:

[0107] The single-line diagram parsing module is used to collect single-line diagram files, parse them, and extract basic information of the equipment; the basic information of the equipment includes equipment type, name, and coordinate point position relationship;

[0108] Then, the devices whose device types are lines and switches are selected; the traversal search method is used to sort out the order of the devices according to the starting relationship of the coordinate points; then, the switch devices and the lines between them are visualized;

[0109] The SOE data parsing module is used to obtain the distribution network SOE fault alarm information and clean the SOE fault alarm information to remove invalid and redundant information; then, the SOE fault alarm information is parsed into equipment information, point table information, action type, and SOE time field, and then the signals of opening, closing, and locking, and the action type of opening, closing, and action are filtered out from the point table information; the equipment information is named as "line name + tower name + switch name";

[0110] The data mapping module is used to unify the device names of the single-line diagram and the SOE device names, and then establish the mapping relationship between the single-line diagram devices and the SOE data;

[0111] The fault analysis rule formulation module is used to ensure that the equipment action sequence complies with the sequence of the protection signal first and then the action signal, and the fault occurs after the forward blocking signal and before the reverse blocking signal;

[0112] The fault analysis and location module is used to sort the analyzed SOE data in chronological order;

[0113] According to the opening and closing action sequence rules of the equipment, check the lack of switch signals and disordered action implementation sequence; verify the corresponding relationship between protection signals and action signals. Before the opening action signal, there is a protection signal that explains the action reason. Opening first and then closing. If this sequence is not met, it is determined to be abnormal opening and closing;

[0114] Locate the forward blocking and reverse blocking signals and determine whether the abnormal device is between the two signals;

[0115] When there is no closing signal after the switch is opened, or there is no opening signal before closing, the device is directly located as an abnormal switch device; otherwise, fuzzy fault location is performed, and the fault location information is output as the rear section of the forward locking signal device, the front section of the reverse locking signal device, or between the forward locking device and the reverse device signal device;

[0116] The fault location information output module is used to output a fault report, which includes fault location information. The fault location information includes the name of the abnormal device, the fault type, and the fault location.

[0117] Example 3

[0118] A method for automatic fault analysis based on distribution network SOE information includes the following steps:

[0119] 1. Single line diagram analysis

[0120] Currently, single-line diagrams mainly exist in two formats: SVG and XML, and the information they contain complements each other. By deeply analyzing the single-line diagrams in these two formats, we can accurately obtain the basic information of the equipment (including equipment type, name, and coordinate point position relationship) and the position relationship of the coordinate points. Based on the coordinate position information of the equipment and the detailed information of various components (such as equipment type and name), we filter out devices with device types of "line" and "switch". Then, using the starting relationship of the coordinate points and an efficient traversal search method, we can accurately sort out the order of these devices.

[0121] To display this information intuitively, we use web canvas technology to clearly present the switchgear and the lines between them. For devices that may be omitted between coordinate points, the line completion method is applied to automatically complete the adjacent endpoints through line segments according to the coordinate endpoints of the device, intelligently supplement the missing line connection points, and construct a clear and concise single-line diagram of the device switch.

[0122] Finally, in order to adapt to the screen size of regular computers, we use proportional scaling to scale down the lines between the switchgear, ensuring that users can fully browse the switchgear under the entire substation on one screen.

[0123] 2. SOE data analysis

[0124] The distribution network SOE fault alarm information is obtained from the substation SCADA system. There are many types of signals in the fault alarm information, most of which are invalid signals for fault judgment. It is necessary to parse out the switch closing, switch opening, and locking signals. First, the SOE signal is marked with spaces, and the signal is parsed into equipment information, point table information, action type, and SOE time to form a unified data format. Among them, the equipment information is mainly disassembled and parsed for the line name + tower name + switch name, which is convenient for establishing a mapping relationship with the single-line diagram parsing data. For the data in the unified format, a keyword screening scheme is used to filter out the opening, closing, and locking signals from the point table information, and the action types are opening, closing, and action as one of the bases for fault judgment.

[0125] 3. Data Mapping

[0126] The device names in the single-line diagram and the SOE device naming method are not exactly the same. By completing the device names on both sides and unifying them into line name + tower name + switch name, a one-to-one correspondence is established, and a mapping correspondence is established between the SOE data and the single-line diagram device data. This allows the device action data and the context data (for example, the device sequence is device 1, device 2, device 3, device 4, device 5. In theory, the switch opening and closing is in this order. The devices are opened and closed in turn. The SOE devices and the devices on the single-line diagram establish a correspondence. Based on the context relationship on the diagram, it can be determined whether the action is performed according to this relationship and whether any equipment has not moved) to be indirectly associated as the basis for fault judgment.

[0127] 4. Establishment of fault analysis rules

[0128] Fault analysis rules are formulated: the equipment action sequence conforms to the sequence of precedence and follow-up, with the protection signal coming first and then the action signal, and the fault occurs after the forward lockout and before the reverse lockout signal.

[0129] 5. Fault analysis and location: By sorting the analyzed SOE data in positive order according to the SOE millisecond-level precision time, first perform action sequence fault troubleshooting, and based on the front and back relationship of the single-line diagram, check whether there are any missing switch signals and disordered action implementation. Secondly, check whether there are any missing protection signals. Then the action type is closing and there must be a protection signal with the action type of action before closing. Explain whether the reason for opening and closing is power failure or power closing. Similarly, check in reverse to see whether a signal with the action type of opening and closing is generated after the protection signal. If there is any abnormality, locate the specific switch device. Finally, locate the forward locking and reverse locking signals to determine whether the above abnormalities are between these two signals.

[0130] When there is no closing signal after the switch is opened, or there is no opening signal before closing, the device is directly located as an abnormal switching device; otherwise, fuzzy fault location is performed, and the fault location information is output as the rear section of the forward locking signal device, the front section of the reverse locking signal device, or between the forward locking device and the reverse device signal device, to help narrow the scope of fault analysis.

[0131] 6. Fault location information output: Output fault report, which includes fault location information, including the name of abnormal equipment, fault type, and fault location. Output fault report, which includes fault location information, including the name of abnormal equipment, fault type, and fault location. Fault types include abnormal action sequence, missing signal, and abnormal opening and closing.

[0132] The present invention creates a visual file input method and a visual fault location output, and can directly upload SOE data and single-line diagram data. The system automatically performs analysis and judgment, and performs automatic fault analysis and judgment by presenting a switch diagram and marking abnormal equipment and fault reports on the diagram.

[0133] Application Examples

[0134] 1. Analysis of single-line diagram model

[0135] 1. Data preparation:

[0136] Collect single-line diagram files in SVG and XML formats to ensure the integrity and accuracy of the file content;

[0137] Preprocess files, including removing incomplete files, files with inconsistent lines between SVG and XML, removing unclear files, parsing the device and coordinate information in the files and storing them in a unified format.

[0138] 2. Parsing process:

[0139] Parse single-line diagrams in SVG and XML formats;

[0140] Extract basic information of the device, including device type, name, and coordinate point location relationship.

[0141] Filter out devices with device types of "line" and "switch", and record their relevant information.

[0142] 3. Data collation and visualization:

[0143] Using the traversal search method, the order of the devices can be sorted out according to the starting relationship of the coordinate points.

[0144] The web canvas technology is used to visualize the switchgear and the wiring between them.

[0145] For missed lines, the line completion method is applied. According to the coordinate endpoints of the equipment, adjacent endpoints are automatically completed through line segments to supplement the missed line connection points, connect the equipment in series, and ensure the integrity of the line connection.

[0146] According to the screen size, the line ratio is adjusted by proportional scaling to meet the display requirements of different devices.

[0147] 2. SOE Data Analysis

[0148] 1. Data acquisition:

[0149] Obtain distribution network SOE fault alarm information from the substation SCADA system to ensure the real-time and accuracy of the data and ensure that it is the same line data as the single-line diagram data.

[0150] 2. Data preprocessing:

[0151] Clean the SOE data to remove invalid and redundant information.

[0152] Unify the data format and parse the SOE signal into device information, point table information, action type, and SOE time fields.

[0153] 3. Signal screening and classification:

[0154] A keyword screening scheme is adopted to screen out the signals of opening, closing and locking from the point table information, and the action types are opening, closing and action.

[0155] Signals are classified according to action types to provide basic data for subsequent fault analysis.

[0156] 3. Data Mapping

[0157] 1. Unified device names:

[0158] Complete and unify the single-line diagram device names and SOE device naming methods to ensure the accurate correspondence between the two.

[0159] 2. Establish a mapping relationship:

[0160] According to the equipment name, voltage level, and line name information, a mapping relationship between the single-line diagram equipment and SOE data is established.

[0161] Verify the accuracy of the mapping relationship to ensure the reliability of subsequent fault analysis.

[0162] 4. Formulation of Fault Analysis and Judgment Rules

[0163] 1. Rulemaking:

[0164] Based on grid operation experience and expert knowledge, equipment action sequence rules and fault judgment rules are formulated.

[0165] Fault analysis rules are formulated: the equipment action sequence conforms to the sequence of precedence and follow-up, with the protection signal coming first and then the action signal, and the fault occurs after the forward lockout and before the reverse lockout signal.

[0166] 5. Fault analysis and location

[0167] 1. Automated analysis:

[0168] Sort the parsed SOE data in chronological order.

[0169] According to the equipment action sequence rules, check the switch signal missing and action implementation disorder. The logic can be as follows Figure 2 shown.

[0170] Verify the correspondence between the protection signal and the action signal, and determine the reasons for opening and closing the circuit breaker.

[0171] Locate the forward blocking and reverse blocking signals and determine whether the anomaly is between the two signals.

[0172] The judgment result is as follows Figure 3 shown.

[0173] 2. Fault location:

[0174] Based on the analysis results, the abnormal switch equipment is directly located or fuzzy fault location is performed.

[0175] 6. Fault location information output

[0176] Output fault location information, including abnormal device name, fault type, and fault location.

[0177] When the fault location information is output, a circuit diagram containing only the circuits and switches is displayed, the abnormal equipment is marked on the diagram, and a fault report is displayed, such as Figure 4 shown.

[0178] This example uses an automated fault analysis system based on distribution network SOE information;

[0179] 1. Visual file entry:

[0180] Create a visual file entry interface to support users to upload SOE data and single-line diagram data;

[0181] 2. Automated analysis process:

[0182] The system automatically analyzes the uploaded data and conducts fault analysis according to the above steps;

[0183] Present a simplified diagram of the switch on a visual interface, with abnormal equipment and fault reports marked;

[0184] 3. Result output:

[0185] Provides intuitive display of fault analysis results, including abnormal device name, fault type, and fault location.

[0186] Support users to export research and judgment results for subsequent analysis and processing.

[0187] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for automatic fault analysis based on distribution network SOE information, characterized in that: The steps include: Step (1), single-line diagram analysis: collect the single-line diagram file, analyze it, and extract the basic information of the equipment; the basic information of the equipment includes the equipment type, name, and coordinate point position relationship; Then, the devices whose device types are lines and switches are selected; the traversal search method is used to sort out the order of the devices according to the starting relationship of the coordinate points; then, the switch devices and the lines between them are visualized; Step (2), SOE data analysis: obtain the distribution network SOE fault alarm information, and clean the SOE fault alarm information to remove invalid and redundant information; then, parse the SOE fault alarm information into device information, point table information, action type, and SOE time field, and then filter out the signals of opening, closing, and locking from the point table information, and the action type is opening, closing, and action; the device information is named as "line name + tower name + switch name"; Step (3), data mapping: unify the device names of the single-line diagram and the SOE device names, and then establish a mapping relationship between the single-line diagram devices and the SOE data; Step (4), fault analysis rule formulation: the equipment action sequence complies with the sequence of precedence and follow-up, the protection signal comes first and then the action signal, and the fault occurs after the forward lockout and before the reverse lockout signal; Step (5), fault analysis and location: sort the analyzed SOE data in chronological order; According to the opening and closing action sequence rules of the equipment, check the lack of switch signals and disordered action implementation sequence; verify the corresponding relationship between protection signals and action signals. Before the opening action signal, there is a protection signal that explains the action reason. Opening first and then closing. If this sequence is not met, it is determined to be abnormal opening and closing; Locate the forward blocking and reverse blocking signals and determine whether the abnormal device is between the two signals; When there is no closing signal after the switch is opened, or there is no opening signal before closing, the device is directly located as an abnormal switch device; otherwise, fuzzy fault location is performed, and the fault location information is output as the rear section of the forward locking signal device, the front section of the reverse locking signal device, or between the forward locking device and the reverse device signal device; Step (6), fault location information output: output a fault report, the fault report includes fault location information, and the fault location information includes the name of the abnormal device, the fault type, and the fault location.

2. The automatic fault analysis method based on distribution network SOE information according to claim 1 is characterized in that: In step (1), single-line diagram files in SVG format and XML format are collected and preprocessed. The preprocessing includes eliminating incomplete files, files with inconsistent lines between SVG and XML, eliminating unclear files, and parsing the equipment and coordinate information in the files for storage in a unified format.

3. The automatic fault analysis method based on distribution network SOE information according to claim 1 is characterized in that: In step (1), when the switchgear and the lines therebetween are visualized, for the missing lines, the line completion method is applied to automatically complete the adjacent endpoints through line segments according to the coordinate endpoints of the equipment, to supplement the missing line connection points, and to connect the equipment in series; Then the line scale is adjusted using the scaling method to ensure that the user can fully browse the switchgear under the entire substation on one screen.

4. The automatic fault analysis method based on distribution network SOE information according to claim 1 is characterized in that: In step (2), the distribution network SOE fault alarm information is obtained from the substation SCADA system.

5. The automatic fault analysis method based on distribution network SOE information according to claim 1 is characterized in that: In step (2), the device information includes voltage level, line name and switch name.

6. The automatic fault analysis method based on distribution network SOE information according to claim 1 is characterized in that: In step (3), the device name of the single-line diagram and the device name of the SOE are unified into line name + tower name + switch name.

7. The automatic fault analysis method based on distribution network SOE information according to claim 1 is characterized in that: In step (6), a fault report is output, wherein the fault report includes fault location information, and the fault location information includes the name of the abnormal device, the fault type, and the fault location.

8. The automatic fault analysis method based on distribution network SOE information according to claim 1 is characterized in that: In step (6), the fault types include abnormal action sequence, missing signal, and abnormal opening and closing.

9. An automatic fault analysis system based on distribution network SOE information, characterized in that: include: The single-line diagram parsing module is used to collect single-line diagram files, parse them, and extract basic information of the equipment; the basic information of the equipment includes equipment type, name, and coordinate point position relationship; Then, the devices whose device types are lines and switches are selected; the traversal search method is used to sort out the order of the devices according to the starting relationship of the coordinate points; then, the switch devices and the lines between them are visualized; The SOE data parsing module is used to obtain the distribution network SOE fault alarm information and clean the SOE fault alarm information to remove invalid and redundant information; then, the SOE fault alarm information is parsed into equipment information, point table information, action type, and SOE time field, and then the signals of opening, closing, and locking, and the action type of opening, closing, and action are filtered out from the point table information; the equipment information is named as "line name + tower name + switch name"; The data mapping module is used to unify the device names of the single-line diagram and the SOE device names, and then establish the mapping relationship between the single-line diagram devices and the SOE data; The fault analysis rule formulation module is used to ensure that the equipment action sequence complies with the sequence of the protection signal first and then the action signal, and the fault occurs after the forward blocking signal and before the reverse blocking signal; The fault analysis and location module is used to sort the analyzed SOE data in chronological order; According to the opening and closing action sequence rules of the equipment, check the lack of switch signals and disordered action implementation sequence; verify the corresponding relationship between protection signals and action signals. Before the opening action signal, there is a protection signal that explains the action reason. Opening first and then closing. If this sequence is not met, it is determined to be abnormal opening and closing; Locate the forward blocking and reverse blocking signals and determine whether the abnormal device is between the two signals; When there is no closing signal after the switch is opened, or there is no opening signal before closing, the device is directly located as an abnormal switch device; otherwise, fuzzy fault location is performed, and the fault location information is output as the rear section of the forward locking signal device, the front section of the reverse locking signal device, or between the forward locking device and the reverse device signal device; The fault location information output module is used to output a fault report, which includes fault location information. The fault location information includes the name of the abnormal device, the fault type, and the fault location.

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