Power distribution network fault processing and fault positioning method and system

Abstract

The invention discloses a power distribution network fault processing and fault positioning method and system, and relates to the technical field of power grid fault information, and the method comprises the steps: obtaining the data, including real-time data and historical data, of power supply equipment in a power grid system; obtaining the position information of the power grid fault according to the symptom information of the power grid fault, the power grid configuration information and the real-time operation data of each power device; and generating a scheduling instruction according to the position information of the power grid fault, the operation task set, the operation rule set and the power grid configuration information, generating fault position data according to the scheduling instruction, obtaining the position information of the power grid fault, and overhauling the power grid fault. According to the invention, integration of fault processing flows of fault diagnosis, fault maintenance and the like under artificial intelligence is realized through cooperation of a plurality of modules for diagnosis of power grid faults, the labor cost is greatly saved, the power grid fault processing efficiency is improved, and the power grid fault time is effectively shortened, so that the economic loss is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid fault information, and in particular to a method and system for processing and locating power distribution network faults. Background Art

[0002] The stable operation of the power system is an important guarantee for the normal life and production of residents and enterprises in various regions. When the power system fails and cannot supply power normally, it is necessary to troubleshoot and handle the fault as soon as possible, so as to restore power supply as soon as possible and minimize the risks and losses caused by power outages. However, the traditional prediction, location and attribution of faults all rely on the experience and inspections of staff; at the same time, when performing daily operations and fault repairs on the power grid, it also relies on operation tickets for scheduling, and operation tickets usually need to be filled out, analyzed and reviewed manually. It can be seen that if the traditional method is used to handle power grid faults, it will not only be time-consuming and labor-intensive, but will also lead to increased risks and losses caused by power outages.

[0003] At present, there are some systems for automatic generation and verification of operation tickets in industrial fields such as electrical system automation and power grid. These systems can effectively improve work efficiency and safety in their respective fields by establishing dynamic template solutions to realize automatic reasoning of complex operation tasks, or converting topological structure diagrams into association matrices or adjacency tables for scheduling. However, the above systems mainly rely on external information to input fault point information, fail to troubleshoot power grid faults, and are difficult to locate power grid faults. Therefore, we propose a method and system for distribution network fault handling and fault location. Summary of the invention

[0004] In view of the problems existing in the existing distribution network fault processing and fault location methods, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is how to troubleshoot and locate power grid faults without relying on external information to input fault point information.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a distribution network fault processing and fault location method, which includes obtaining data of power supply equipment in the power grid system, including real-time data and historical data; obtaining location information of the power grid fault based on symptom information of the power grid fault, power grid configuration information and real-time operation data of each power equipment; generating a dispatch instruction based on the location information of the power grid fault, an operation task set, an operation rule set and power grid configuration information, generating fault location data based on the dispatch instruction, obtaining the location information of the power grid fault, and repairing the power grid fault.

[0008] As a preferred solution of the distribution network fault handling and fault location method described in the present invention, the real-time data is monitored, and the historical data is saved and backed up, the real-time data includes symptom information of the power grid fault, power grid configuration information and real-time operation data of each power equipment; the location information of the power grid fault is obtained based on the real-time data.

[0009] As a preferred solution of the distribution network fault handling and fault locating method described in the present invention, based on the location information of the power grid fault, a dispatch instruction is generated by a fault handling terminal in combination with an operation task set, an operation rule set and a power grid configuration information of the power grid fault, fault location data is generated according to the dispatch instruction, the location information of the power grid fault is obtained, and the power grid fault is repaired.

[0010] As a preferred solution of the distribution network fault handling and fault location method described in the present invention, wherein: the fault location is obtained by constructing a fault location model based on the symptom information of the power grid fault, the fault service path, the voltage and current data of each power grid node, and Boolean equations and linear equations; the fault location model is solved, the power grid is actually operated to troubleshoot the fault according to the simulated operation records, and the fault location model is analyzed from all aspects to obtain the location information of the power grid fault.

[0011] As a preferred solution of the distribution network fault handling and fault location method described in the present invention, a data analysis module is provided in the fault handling terminal, and the data analysis module analyzes the real-time operation data of each power equipment to obtain the voltage and current data of each grid node.

[0012] As a preferred solution of the distribution network fault processing and fault locating method of the present invention, wherein: a path analysis module is provided in the fault processing terminal for acquiring the fault service path according to the symptom information of the power grid fault and the power grid configuration information.

[0013] As a preferred solution of the distribution network fault handling and fault locating method described in the present invention, wherein: based on the fault current information collected by the fault handling terminal, the internal fault of the distribution network is accurately located, and the switches at both ends of the fault are quickly disconnected to isolate the fault; for a 10kV bus fault in the distribution network, it is determined whether the 10kV bus of the distribution network has a fault by judging whether the 10kV bus voltage drops sharply. If a fault occurs, the connection switch between the distribution network and the large power grid is disconnected to separate the distribution network from the large power grid.

[0014] In the second aspect, an embodiment of the present invention provides a distribution network fault processing and fault location system, which includes: a data collection module, used to obtain data of power supply equipment in the power grid system, including real-time data and historical data; a fault information detection module, used to obtain the location information of the power grid fault based on the symptom information of the power grid fault, the power grid configuration information and the real-time operation data of each power equipment; a fault processing terminal, used to generate a dispatching instruction based on the location information of the power grid fault, the operation task set, the operation rule set and the power grid configuration information, generate fault location data according to the dispatching instruction, obtain the location information of the power grid fault, and repair the power grid fault.

[0015] In a third aspect, an embodiment of the present invention provides a computer device, including a memory and a processor, wherein the memory stores a computer program, wherein: when the processor executes the computer program, any step of the above-mentioned distribution network fault processing and fault location method is implemented.

[0016] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein: when the computer program is executed by a processor, any step of the above-mentioned distribution network fault handling and fault location method is implemented.

[0017] The beneficial effect of the present invention is that the present invention realizes the integration of fault handling processes such as fault diagnosis and fault repair under artificial intelligence through the cooperation of multiple modules for the diagnosis of power grid faults, which greatly saves labor costs, improves the efficiency of power grid fault handling, and effectively shortens the power grid fault time, thereby greatly reducing economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0019] Figure 1 It is a system module diagram of the distribution network fault processing and fault location method;

[0020] Figure 2 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0024] Example 1

[0025] Reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, and provides a distribution network fault processing and fault location method, comprising:

[0026] S1: Obtain data of power supply equipment in the power grid system, including real-time data and historical data.

[0027] Through the data acquisition system, the real-time data of the power supply equipment in the power grid system is obtained and the data is monitored;

[0028] Through various sensors and monitoring devices installed on power supply equipment and grid nodes, real-time data is continuously monitored and collected, including voltage, current, power, frequency and power factor:

[0029] Voltage and current data: Collect the voltage and current of each grid node, including three-phase voltage, current magnitude, phase angle, etc. This data helps identify overload, short circuit or other abnormal conditions.

[0030] Power data: including active power and reactive power, monitoring the load balance of the power grid.

[0031] Frequency data: Monitor fluctuations in system frequency and assess grid stability.

[0032] Power factor: Determine the efficiency and stability of the load by monitoring the power factor of each electrical device.

[0033] Through the data storage module, the data storage module saves and backs up the data of the power supply equipment in the historical power grid system.

[0034] Archive the large amount of real-time data generated during operation to ensure that the system has sufficient operation data support in the long term, including:

[0035] Historical operation data of power equipment: including historical records of equipment such as voltage, current, and power, used to analyze the long-term performance of equipment.

[0036] Historical symptom information of power grid faults: Data such as voltage, current, and load fluctuations in past fault events provide learning materials for the model.

[0037] Evolution of grid configuration information: including the impact of topology changes, equipment upgrades or additions on system configuration.

[0038] By continuously monitoring real-time data, the system can identify potential hidden dangers of failure, conduct trend analysis and prediction based on historical data, and take protective measures in advance. When a failure occurs, the system combines real-time and historical data analysis to quickly generate a fault location model, accurately locate the fault point and implement targeted processing.

[0039] S2: Obtain the location information of the power grid fault based on the symptom information of the power grid fault, the power grid configuration information and the real-time operation data of each power device.

[0040] The data storage module is connected to the data storage module and is used to obtain the location information of the power grid fault according to the symptom information of the power grid fault, the power grid configuration information and the real-time operation data of each power device;

[0041] Through the fault processing terminal, it is used to generate a dispatch instruction according to the location information of the power grid fault, the operation task set, the operation rule set and the power grid configuration information, generate fault location data according to the dispatch instruction, obtain the location information of the power grid fault, and repair the power grid fault;

[0042] A data model module is used to construct a fault location model according to the symptom information of the power grid fault, the fault service path, the voltage and current data of each power grid node, and Boolean equations and linear equations;

[0043] The fault location unit is used to solve the fault location model, perform actual operation to troubleshoot the power grid according to the simulated operation record, and perform multi-faceted analysis on the model generated by the data model module to obtain the location information of the power grid fault;

[0044] Through the data analysis module, the data analysis module analyzes the real-time operation data of each power device to obtain the voltage and current data of each grid node;

[0045] A path analysis module is used to obtain a fault service path according to the symptom information of the power grid fault and the power grid configuration information;

[0046] The fault information detection module includes the fault current information collected by the terminal for the internal fault of the distribution network, accurately locates the internal fault of the distribution network, and quickly disconnects the switches at both ends of the fault to isolate the fault; for the 10kV bus fault of the distribution network, it is determined whether the 10kV bus of the distribution network has a fault by judging whether the 10kV bus voltage drops sharply. If a fault occurs, the connection switch between the distribution network and the large power grid is disconnected to separate the distribution network from the large power grid;

[0047] After a fault occurs, for the distributed power source on the faulty feeder, if it is a non-black start distributed power source, its outlet circuit breaker is directly tripped; for the black start distributed power source, the grid-connected circuit breaker is disconnected, and the island operation mode of the circuit breaker interface is used to supply power to local users; when the capacity of the black start distributed power source is less than the load power of the local user, the load shedding operation is performed;

[0048] Distributed power sources on non-faulty feeders can continue to maintain grid-connected operation;

[0049] After the fault is located, the power-off area is searched. The terminal receives the instruction from the local device and diagnoses the fault area in combination with the corresponding directed association list and the power flow direction of the entire network. After the diagnosis is completed, the local device is notified. The local device trips all switches around the fault and detects the result of the operation. If the tripping is unsuccessful, the isolation range is expanded through cooperation with other local devices, and the power supply to the upstream area of ​​the fault is restored by closing the circuit breaker switch at the head end. At the same time, the power supply to the downstream area of ​​the fault is restored by closing the contact switch.

[0050] Among them, the local device at each switch of the feeder obtains current data. When a short circuit occurs in the line, the local device determines the short circuit fault. At the line exit, the local device forms a common tripping signal to trip the circuit breaker; all terminals obtain the fault information of the local device, and determine the fault location in combination with the information obtained by the terminals of the adjacent switches; the local device disconnects the switches at both ends of the fault according to the judgment result of the terminal to isolate the fault area, and notifies other local devices of the isolation result; after the isolation is successful, the local device combines the locking information, closes the head-end switch and the connecting switch, and restores power supply to the non-fault area.

[0051] S3: Generate dispatch instructions according to the location information of the power grid fault, the operation task set, the operation rule set and the power grid configuration information, generate fault location data according to the dispatch instructions, obtain the power grid fault location, and repair the power grid fault.

[0052] The fault handling terminal is connected to the data storage module, and is used to generate a dispatch instruction according to the location information of the power grid fault, the operation task set, the operation rule set and the power grid configuration information, generate fault location data according to the dispatch instruction, obtain the location information of the power grid fault, and repair the power grid fault.

[0053] A data model module is provided in the fault information detection module, and the data model module is used to construct a fault location model according to the symptom information of the power grid fault, the fault service path, the voltage and current data of each power grid node, and Boolean equations and linear equations.

[0054] Furthermore, a fault location unit is provided in the fault handling terminal, and the fault location unit is used to solve the fault location model, perform actual operation to troubleshoot the power grid according to the simulation operation record, and perform a multi-faceted analysis on the model generated by the data model module to obtain the location information of the power grid fault.

[0055] Furthermore, a data analysis module is provided in the fault processing terminal, and the data analysis module analyzes the real-time operation data of each power equipment to obtain the voltage and current data of each grid node.

[0056] Furthermore, the fault processing terminal is provided with a path analysis module for acquiring a fault service path according to the symptom information of the power grid fault and the power grid configuration information.

[0057] Furthermore, the fault information detection module includes, for internal faults in the distribution network, accurately locating the internal faults in the distribution network through the fault current information collected by the terminal, and quickly disconnecting the switches at both ends of the fault to isolate the fault; for 10kV bus faults in the distribution network, determining whether the 10kV bus voltage of the distribution network drops sharply to determine whether a fault occurs in the 10kV bus of the distribution network. If a fault occurs, disconnecting the connection switch between the distribution network and the large power grid to separate the distribution network from the large power grid.

[0058] In summary, the present invention constructs a fault location model based on the symptom information of the power grid fault, the fault service path and the voltage and current data of each of the power grid nodes, and adopts a hybrid equation of Boolean equations and linear equations; by solving the fault location model, the location information of the power grid fault can be obtained, thereby realizing the rapid location of the power grid fault, and then improving the processing efficiency of the power grid fault. The diagnosis of power grid faults through the cooperation of multiple modules realizes the integration of fault processing processes such as fault diagnosis and fault repair under artificial intelligence, greatly saves labor costs, improves the efficiency of power grid fault processing, and effectively shortens the power grid fault time, thereby greatly reducing economic losses.

[0059] Example 2

[0060] Reference Figure 1 Based on the first embodiment, this embodiment further provides a distribution network fault processing and fault location system, including:

[0061] Data acquisition module, used to obtain real-time data of power supply equipment in the power grid system and monitor the data;

[0062] A data storage module, used for the data storage module to save and back up the data of the power supply equipment in the historical power grid system;

[0063] A fault information detection module, connected to the data storage module, is used to obtain the location information of the power grid fault according to the symptom information of the power grid fault, the power grid configuration information and the real-time operation data of each power device;

[0064] A fault handling terminal is used to generate a dispatch instruction according to the location information of the power grid fault, an operation task set, an operation rule set and the power grid configuration information, generate fault location data according to the dispatch instruction, obtain the location information of the power grid fault, and perform maintenance on the power grid fault;

[0065] A data model module is used to construct a fault location model based on the symptom information of the power grid fault, the fault service path, the voltage and current data of each power grid node, and the Boolean equation and the linear equation;

[0066] The fault location unit is used to solve the fault location model, perform actual operation to troubleshoot the power grid according to the simulated operation record, and perform multi-faceted analysis on the model generated by the data model module to obtain the location information of the power grid fault;

[0067] A data analysis module analyzes the real-time operation data of each power device to obtain the voltage and current data of each grid node;

[0068] A path analysis module is used to obtain a fault service path based on the symptom information of the power grid fault and the power grid configuration information;

[0069] The fault information detection module is used to accurately locate the internal fault of the distribution network through the fault current information collected by the terminal, and quickly disconnect the switches at both ends of the fault to isolate the fault.

[0070] This embodiment also provides a computer device, which is suitable for the distribution network fault processing and fault location method, including a memory and a processor; the memory is used to store computer executable instructions, and the processor is used to execute computer executable instructions to implement the distribution network fault processing and fault location method proposed in the above embodiment.

[0071] The computer device may be a terminal, and the computer device includes a processor, a memory, a communication interface, a display screen and an input device connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. The display screen of the computer device may be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device may be a touch layer covering the display screen, or a key, trackball or touchpad provided on the housing of the computer device, or an external keyboard, touchpad or mouse, etc.

[0072] This embodiment also provides a storage medium on which a computer program is stored. When the program is executed by a processor, the method for handling and locating distribution network faults as proposed in the above embodiment is implemented.

[0073] The storage medium proposed in this embodiment and the data storage method proposed in the above embodiment belong to the same inventive concept. The technical details not fully described in this embodiment can be found in the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0074] Example 3

[0075] On the basis of the previous two embodiments, this embodiment provides a distribution network fault processing and fault location method. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through simulation experiments.

[0076] The experiment is demonstrated using a 10kV distribution network that includes transformers, busbars, lines, circuit breakers, and several distributed generation sources and loads.

[0077] A real-time data collector, a historical data storage module, a fault detection terminal, and a simulated operator are set up to compare the manual fault location.

[0078] Build a distribution network model, set up main nodes, lines, transformers and protection equipment, and configure a real-time monitoring module to simulate data collection and fault detection.

[0079] The following two faults are simulated:

[0080] Short circuit fault: A three-phase short circuit is applied on one of the feeders.

[0081] Overload fault: An overload fault caused by artificially applying a rated load that exceeds the power distribution capacity.

[0082] The comparison method includes: a traditional fault handling method experiment and the method of the present invention.

[0083] The experimental results are shown in Table 1:

[0084] Table 1 Comparative experimental results

[0085] Compare Projects Traditional troubleshooting methods Method of the present invention Fault location time 45 minutes 2 minutes Repair time 1.5 hours 10 minutes Fault location accuracy 85％ 99％ Power outage time 2 hours 12 minutes Economic losses 50,000 yuan 0.5 million yuan

[0086] Table 1 shows that there are significant differences between the traditional fault handling method and the automated fault handling method of the present invention in many aspects. First, in terms of fault location time, the traditional method takes an average of 45 minutes, which is mainly because the operator needs to rely on experience to manually troubleshoot the fault point, while the automated system of the present invention can accurately locate the fault in only 2 minutes through the combined analysis of real-time data and historical data, greatly improving the location efficiency. In terms of repair time, the traditional method often requires dispatching personnel to the site for processing, and the entire process takes about 1.5 hours, while the system of the present invention can automatically generate dispatch instructions, quickly isolate the fault and restore power supply to the non-fault area, shortening the repair time to 10 minutes.

[0087] Due to the uncertainty of manual judgment, the accuracy of the traditional method is about 85%, while the present invention uses fault location models and data analysis technology to increase the accuracy to 99%, avoiding positioning errors caused by human misjudgment. In addition, the overall power outage time of the traditional method is relatively long, usually 2 hours, which has a great impact on the power supply stability of users, while the present invention can restore power supply to non-fault areas within 12 minutes, significantly shortening the power outage time. In addition, the traditional method causes an average loss of 50,000 yuan due to the long power outage time, while the present invention controls the economic loss to about 5,000 yuan through rapid positioning and repair. Overall, the present invention has obvious advantages in the speed, accuracy and economic benefits of fault handling, greatly improving the efficiency of power grid fault handling, while reducing power outage time and economic losses.

[0088] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A distribution network fault processing and fault location method, characterized in that: include, Obtain data of power supply equipment in the power grid system, including real-time data and historical data; Obtaining the location information of the power grid fault based on the symptom information of the power grid fault, the power grid configuration information and the real-time operation data of each power device; Generate dispatch instructions based on the location information of the power grid fault, the operation task set, the operation rule set and the power grid configuration information, generate fault location data based on the dispatch instructions, obtain the power grid fault location, and repair the power grid fault.

2. The method for handling and locating a distribution network fault according to claim 1, wherein: Monitor the real-time data, save and back up the historical data, The real-time data includes symptom information of power grid faults, power grid configuration information and real-time operation data of each power device; Obtain location information of power grid faults based on real-time data.

3. The method for handling and locating a distribution network fault according to claim 2, wherein: Based on the location information of the power grid fault, a dispatch instruction is generated through a fault processing terminal in combination with an operation task set, an operation rule set and power grid configuration information of the power grid fault, fault location data is generated according to the dispatch instruction, the location information of the power grid fault is obtained, and the power grid fault is repaired.

4. The method for handling and locating a distribution network fault according to claim 3, characterized in that: The fault location is obtained by constructing a fault location model based on the symptom information of the power grid fault, the fault service path, the voltage and current data of each power grid node, and the Boolean equation and the linear equation; The fault location model is solved, the power grid is actually operated to troubleshoot the fault according to the simulated operation record, and the fault location model is analyzed from multiple perspectives to obtain the location information of the power grid fault.

5. The method for handling and locating a distribution network fault according to claim 4, characterized in that: The fault processing terminal is provided with a data analysis module, which analyzes the real-time operation data of each power equipment to obtain the voltage and current data of each power grid node.

6. The method for handling and locating a distribution network fault according to claim 5, characterized in that: The fault processing terminal is provided with a path analysis module for acquiring the fault service path according to the symptom information of the power grid fault and the power grid configuration information.

7. The method for handling and locating a distribution network fault according to claim 6, wherein: According to the fault current information collected by the fault handling terminal, the internal fault of the distribution network is accurately located, and the switches at both ends of the fault are quickly disconnected to isolate the fault; for the 10kV bus fault of the distribution network, it is determined whether the 10kV bus voltage of the distribution network drops sharply to determine whether a fault occurs in the 10kV bus of the distribution network. If a fault occurs, the connection switch between the distribution network and the large power grid is disconnected to separate the distribution network from the large power grid.

8. A distribution network fault processing and fault location system, based on the distribution network fault processing and fault location method according to any one of claims 1 to 7, characterized in that: include A data collection module is used to obtain data of power supply equipment in the power grid system, including real-time data and historical data; A fault information detection module is used to obtain the location information of the power grid fault based on the symptom information of the power grid fault, the power grid configuration information and the real-time operation data of each power device; The fault handling terminal is used to generate a dispatch instruction according to the location information of the power grid fault, the operation task set, the operation rule set and the power grid configuration information, generate fault location data according to the dispatch instruction, obtain the power grid fault location, and repair the power grid fault.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the distribution network fault processing and fault location method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the distribution network fault processing and fault location method according to any one of claims 1 to 7 are implemented.

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