Man-machine interaction and management method and system for fault self-recovery of power distribution system

Abstract

The invention discloses a man-machine interaction and management method and system for power distribution system fault self-healing, and relates to the technical field of power distribution system fault self-healing, and the method comprises the steps: collecting the information of a power distribution system, and judging the fault condition through the comprehensive evaluation of the fault degree of the power distribution system; performing grid structure optimization on the fault power distribution system, and performing load transfer capacity optimization on the power distribution system in a load cutting mode; through protection configuration and man-machine interaction, grading protection is carried out on different fault conditions, and power distribution system fault self-healing comprehensive evaluation is carried out. According to the method, the fault condition is judged by comprehensively evaluating the fault degree of the power distribution system, and the comprehensiveness of the feedback content of the power distribution system is improved; invalid contact is removed from a fault power distribution system, effective contact is reserved, and a standard single-ring network structure is created, so that the reliability of fault judgment and the efficiency of fault self-healing are improved; through graded protection, large-range power failure or excessive reaction is avoided, and the fault self-healing efficiency and stability of the power distribution system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution system fault self-healing, and in particular to a human-computer interaction and management method and system for power distribution system fault self-healing. Background Art

[0002] In the field of modern power systems, the operation and management of distribution systems have gradually changed from the traditional static mode to a dynamic adaptive mode relying on advanced information technology. With the widespread deployment of distributed energy resources and the popularization of smart meters, distribution systems are facing a more complex and dynamic operating environment. Traditional distribution system fault handling strategies, such as those that rely entirely on manual judgment or protection strategies based on fixed parameters, have been unable to meet the high reliability and high efficiency requirements of modern power grids. Research in recent decades has shown that although automation technology has made significant progress in fault detection and isolation, it still faces huge challenges in the case of multiple fault scenarios, complex topologies or nonlinear characteristics.

[0003] Current distribution system fault handling strategies mostly focus on a single technical path, such as a specific protection algorithm or a specific equipment configuration. However, in actual operation, due to the complexity and diversity of the distribution network, a single technical path may lead to limitations in fault isolation and recovery, especially in the face of large-scale, multi-point or cross-faults. In addition, the interactivity between people and systems is also crucial in fault handling. The current human-computer interaction interface and strategies often ignore the cognitive and operational characteristics of operators, which may lead to misoperation or operation delays at critical moments. Therefore, in-depth research and development of a distribution system fault self-healing method that integrates human-computer interaction and advanced management strategies is of great practical significance for improving the stability and reliability of the system. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention is proposed.

[0005] Therefore, the technical problem solved by the present invention is: the existing distribution system fault self-healing method has limitations, low stability, low reliability, and how to better troubleshoot and prevent distribution system faults through system self-healing and human-computer interaction.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a human-computer interaction and management method for self-healing of distribution system faults, including collecting distribution system information, judging the fault situation by comprehensively evaluating the degree of distribution system faults; optimizing the grid structure of the faulty distribution system, and optimizing the load transfer capacity of the distribution system by load cutting; performing graded protection for different fault situations through protection configuration and human-computer interaction, and conducting a comprehensive evaluation of self-healing of distribution system faults.

[0007] As a preferred scheme of the human-computer interaction and management method for self-healing of distribution system faults described in the present invention, wherein: the collection of distribution system information includes collecting node voltage, node current, load data in different time periods, sensor data, power quality data, communication data and environmental condition data of the distribution system through sensors and remote detection equipment; sensor data includes temperature and humidity of equipment and lines; power quality data includes harmonics and waveform distortion; environmental condition data includes temperature, humidity and wind speed of the environment.

[0008] As a preferred solution of the human-computer interaction and management method for self-healing of power distribution system faults described in the present invention, the method of judging the fault condition by comprehensively evaluating the degree of fault in the power distribution system includes calculating the degree of fault D of the power distribution system comprehensively evaluated based on the collected power distribution system information, which is expressed as:

[0009]

[0010] Where N represents the number of distribution system data samples, i represents the device serial number, f1(V i ,I i ) is expressed as a voltage and current influence function, V i Represented as the node voltage of the ith device, I i Expressed as the i-th node current, f2(P i ) is expressed as the load influence function, P i It is represented as the real-time load of the i-th device, f3(T i ,H i ) is expressed as the equipment temperature and humidity influence function, T i Represented as the temperature of the i-th device, H i Expressed as the humidity of the i-th device, f4(S a ,L w ) is expressed as the harmonic and waveform distortion influence function, S a Expressed as harmonic level, L w Expressed as the waveform distortion level.

[0011] The voltage and current influence function is expressed as:

[0012] f1(V i ,I i )=α·|V i | p ·|I i | q

[0013] Among them, α represents the correlation coefficient, p represents the node voltage index, and q represents the node current index; the load influence function is expressed as:

[0014] f2(P i)=β0+β1·P i +β2·P i 2

[0015] Among them, β0, β1 and β2 are the fitting coefficients of different loads respectively; the equipment temperature and humidity influence function is expressed as:

[0016]

[0017] The harmonic and waveform distortion influence function is expressed as:

[0018]

[0019] When the change in D is greater than 30%, the power distribution system should be checked to determine the fault condition, confirm the fault point and the communication status.

[0020] As a preferred scheme of the human-computer interaction and management method for self-healing of distribution system faults described in the present invention, the grid structure optimization includes removing invalid connections and retaining valid connections in the faulty distribution system to create a standard single-ring network structure, and the invalid connections include Class A invalid connections and Class B invalid connections.

[0021] When the contact point is a non-automated device, the contact mode is Class A invalid contact, and when the non-automated equipment line fails, no assistance is provided for the recovery of the non-faulty section.

[0022] When the contact points are on the same section of the line, the contact mode is Class B invalid contact, and load transfer cannot be provided when a line failure occurs.

[0023] When the contact point is an automation device and the contact point is not in the same segment of the line, the contact mode is effective contact. When a failure occurs in the automation equipment line, assistance is provided for the recovery of the non-faulty section, and the lines in the distribution system provide load transfer.

[0024] Each node in the standard single-ring network structure has only two connections. When there are two valid connections among the two connections, the distribution system operates normally. When there is one Class A invalid connection and one valid connection among the two connections, the invalid connection is replaced with a valid connection. When there is one Class B invalid connection and one valid connection among the two connections, the distribution system operates normally but a fault warning is issued, and the invalid connection is replaced with a valid connection. When there is one Class A invalid connection and one Class B invalid connection among the two connections, the distribution system suspends operation, a fault warning is issued, and the invalid connection is replaced with a valid connection. When there are two Class B invalid connections among the two connections, the distribution system suspends operation, a fault warning is issued, and the invalid connection is replaced with a valid connection.

[0025] As a preferred scheme of the human-computer interaction and management method for self-healing of distribution system faults described in the present invention, wherein: the optimization of the load transfer capacity of the distribution system includes optimizing the load transfer capacity of the distribution system by load cutting for lines with Class B invalid connections, and measuring the line load conditions on Class B invalid connections.

[0026] When the load impact function value in the comprehensive evaluation of the distribution system fault degree D reaches 60%, the load cutting mechanism is triggered to cut off the power supply of the faulty line equipment or area, reduce the total line load impact function value to within 60%, and store the cut-off equipment or area information.

[0027] Whenever the load shedding mechanism is triggered, the system records the number of triggering times. If the same line is triggered three times cumulatively, the troubleshooting method is changed to remove invalid lines and retain valid lines. The troubleshooting record is uploaded to the distribution system, and the operator manually reviews the troubleshooting results.

[0028] As a preferred scheme of the human-computer interaction and management method for self-healing of distribution system faults described in the present invention, the hierarchical protection includes hierarchical protection for different fault conditions through protection configuration and human-computer interaction, and the protection measures include primary protection and secondary protection.

[0029] The first-level protection includes that the only outgoing line of the line is a circuit breaker, there is no section protection in the main line of the line, all users are connected to the main line, the user boundary switch is a load switch, and there is no fault self-healing function. When a user fails, the power supply of the entire line is cut off for protection. After the fault is eliminated, the power supply is restored to normal by manual or automatic means.

[0030] The secondary protection includes the boundary switch on the line with a protection function. When a user fails, only the user's own power supply is cut off, and the cut-off point and fault condition are reported to the distribution system. When the fault is eliminated, the power supply is automatically restored to normal.

[0031] When a fault occurs in a Class A invalid contact line, the first-level protection is used to handle the fault.

[0032] When a fault occurs in a line with invalid Class B connection, secondary protection is used to handle the fault. When the total line load impact function value does not reach 60%, the number of triggering times of the load shedding mechanism is not accumulated.

[0033] When the first-level protection is triggered, if the power is restored manually, the operator will replace the boundary switch in the first-level protection and upgrade the first-level protection to the second-level protection. When the protection measures are triggered again, the second-level protection measures will be executed to troubleshoot the fault and restore power.

[0034] As a preferred scheme of the human-computer interaction and management method for distribution system fault self-healing described in the present invention, wherein: the comprehensive evaluation of distribution system fault self-healing includes evaluating the distribution system fault self-healing efficiency by collecting fault frequency, fault recovery time and fault impact scope, and analyzing the line operation status after the distribution system fault self-healing by collecting user feedback.

[0035] Another object of the present invention is to provide a human-machine interaction and management system for self-healing of distribution system faults, which can optimize the grid structure of the faulty distribution system and optimize the load transfer capacity of the distribution system through load cutting, thereby solving the problem of low reliability of the current self-healing of distribution system faults.

[0036] As a preferred solution of the human-computer interaction and management system for self-healing of distribution system faults described in the present invention, it includes: a fault analysis module, a line optimization module, and a self-healing evaluation module; the fault analysis module is used to collect distribution system information, comprehensively evaluate the degree of distribution system faults and determine the fault situation; the line optimization module is used to optimize the grid structure of the faulty distribution system, and optimize the load transfer capacity of the distribution system through load cutting; the self-healing evaluation module is used to perform hierarchical protection for different fault situations through protection configuration and human-computer interaction, and perform a comprehensive evaluation of distribution system fault self-healing.

[0037] A computer device includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement a human-computer interaction and management method for self-healing of power distribution system faults.

[0038] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of a human-computer interaction and management method for self-healing of power distribution system faults.

[0039] Beneficial effects of the present invention: The human-computer interaction and management method for self-healing of distribution system faults provided by the present invention determines the fault situation by comprehensively evaluating the fault degree of the distribution system, quantifies the information of the distribution system, and monitors the distribution system in real time, thereby improving the comprehensiveness of the feedback content of the distribution system and the reliability of data; by removing invalid contacts and retaining valid contacts in the faulty distribution system, creating a standard single-ring network structure, and classifying invalid contacts, the reliability of fault judgment and the efficiency of self-healing of faults are improved; by optimizing the load transfer capacity of the distribution system, a load cutting mechanism is adopted for the lines with invalid contacts, thereby improving the operating efficiency and reliability of the power system; through protection configuration and human-computer interaction, different fault situations are protected in a graded manner, thereby avoiding unnecessary large-scale power outages or overreactions, and improving the efficiency and stability of self-healing of distribution system faults. The present invention achieves better results in terms of limitations, reliability, efficiency and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0041] Figure 1 This is an overall flow chart of the human-computer interaction and management method for power distribution system fault self-healing provided by the first embodiment of the present invention.

[0042] Figure 2 A schematic diagram of the 1,000-volt Tengqu East line grid structure of the human-computer interaction and management method for self-healing of distribution system faults provided in the first embodiment of the present invention.

[0043] Figure 3 This is an overall flow chart of the human-machine interaction and management system for power distribution system fault self-healing provided by the third embodiment of the present invention. DETAILED DESCRIPTION

[0044] 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.

[0045] Example 1

[0046] Reference Figure 1 , which is an embodiment of the present invention, provides a human-computer interaction and management method for self-healing of power distribution system faults, including:

[0047] S1: Collect distribution system information and determine the fault situation by comprehensively evaluating the degree of fault in the distribution system.

[0048] Furthermore, the collection of distribution system information includes collecting the node voltage, node current, load data in different time periods, sensor data, power quality data, communication data and environmental condition data of the distribution system through sensors and remote detection equipment; sensor data includes temperature and humidity of equipment and lines; power quality data includes harmonics and waveform distortion; environmental condition data includes ambient temperature, humidity and wind speed.

[0049] It should be noted that judging the fault condition by comprehensively evaluating the fault degree of the power distribution system includes calculating the comprehensive evaluation of the fault degree D of the power distribution system based on the collected power distribution system information, which is expressed as:

[0050]

[0051] Where N represents the number of distribution system data samples, i represents the device serial number, f1(V i ,I i ) is expressed as a voltage and current influence function, V i Represented as the node voltage of the ith device, I i Expressed as the i-th node current, f2(P i ) is expressed as the load influence function, P i It is represented as the real-time load of the i-th device, f3(T i ,H i ) is expressed as the equipment temperature and humidity influence function, T i Represented as the temperature of the i-th device, H i Expressed as the humidity of the i-th device, f4(S a ,L w ) is expressed as the harmonic and waveform distortion influence function, S a Expressed as harmonic level, L w It is expressed as the waveform distortion level; the voltage and current influence function is expressed as:

[0052] f1(V i ,I i )=α·|V i | p ·|I i | q

[0053] Among them, α represents the correlation coefficient, p represents the node voltage index, and q represents the node current index; the load influence function is expressed as:

[0054] f2(P i )=β0+β1·P i +β2·P i 2

[0055] Among them, β0, β1 and β2 are the fitting coefficients of different loads respectively; the equipment temperature and humidity influence function is expressed as:

[0056]

[0057] The harmonic and waveform distortion influence function is expressed as:

[0058]

[0059] When the change in D is greater than 30%, the power distribution system should be checked to determine the fault condition, confirm the fault point and the communication status.

[0060] It should also be noted that when the change in D is greater than 30%, abnormal conditions appear in the data for the comprehensive evaluation of the degree of fault in the distribution system. At this time, fault conditions will occur in the distribution system. Fault conditions include short circuit faults. When an unexpected electrical connection occurs between two or more conductors, a short circuit occurs. This may be caused by wire friction, equipment aging, degradation of insulation materials or other external factors. Ground faults. When an unexpected electrical connection occurs between a conductor and the ground (or a grounded object), a ground fault occurs. This may cause a large amount of current to flow to the ground, increasing system losses and potentially causing harm to people and equipment.

[0061] S2: Optimize the grid structure of the faulty distribution system and optimize the load transfer capacity of the distribution system through load shedding.

[0062] Furthermore, the grid structure optimization includes removing invalid connections and retaining valid connections in the faulty distribution system to create a standard single-ring network structure. Invalid connections include Class A invalid connections and Class B invalid connections.

[0063] When the contact point is a non-automated device, the contact mode is Class A invalid contact, and when the non-automated equipment line fails, no assistance is provided for the recovery of the non-faulty section.

[0064] When the contact points are on the same section of the line, the contact mode is Class B invalid contact, and load transfer cannot be provided when a line failure occurs.

[0065] When the contact point is an automation device and the contact point is not in the same segment of the line, the contact mode is effective contact. When a failure occurs in the automation equipment line, assistance is provided for the recovery of the non-faulty section, and the lines in the distribution system provide load transfer.

[0066] Each node in the standard single-ring network structure has only two connections. When there are two valid connections among the two connections, the distribution system operates normally. When there is one Class A invalid connection and one valid connection among the two connections, the invalid connection is replaced with a valid connection. When there is one Class B invalid connection and one valid connection among the two connections, the distribution system operates normally but a fault warning is issued, and the invalid connection is replaced with a valid connection. When there is one Class A invalid connection and one Class B invalid connection among the two connections, the distribution system suspends operation, a fault warning is issued, and the invalid connection is replaced with a valid connection. When there are two Class B invalid connections among the two connections, the distribution system suspends operation, a fault warning is issued, and the invalid connection is replaced with a valid connection.

[0067] It should be noted that the optimization of the load transfer capacity of the distribution system includes optimizing the load transfer capacity of the distribution system for lines with Class B invalid connections through load cutting, and measuring the line load conditions on Class B invalid connections.

[0068] When the load impact function value in the comprehensive evaluation of the distribution system fault degree D reaches 60%, the load cutting mechanism is triggered to cut off the power supply of the faulty line equipment or area, reduce the total line load impact function value to within 60%, and store the cut-off equipment or area information.

[0069] Whenever the load shedding mechanism is triggered, the system records the number of triggering times. If the same line is triggered three times cumulatively, the troubleshooting method is changed to remove invalid lines and retain valid lines. The troubleshooting record is uploaded to the distribution system, and the operator manually reviews the troubleshooting results.

[0070] It should also be explained that, taking the 10 kV Mingwang I line of the 110 kV Mingwang station as an example, the 10 kV Mingwang I line is connected to 6 lines including the 10 kV Haiqu East I line, of which 2 line contact points are non-automated equipment, and the 2 line contact points are located in the same section. In the current state, the non-automated equipment cannot provide assistance for self-healing of the non-fault section, and only one line in the same section is effectively connected. The lines that can ultimately provide load transfer for self-healing are the 10 kV Mingwei South Line and the 10 kV Mingzao South Line. In response to such situations, the plan adopts the approach of removing invalid connections, retaining effective connections, and creating a standard single-ring network structure to solve such problems. The standard single-ring network structure is widely considered to be a stable and efficient configuration in the power system. This strategy emphasizes configuring the entire system as a closed loop to ensure rapid load transfer and recovery under any fault conditions.

[0071] S3: Provide graded protection for different fault conditions through protection configuration and human-computer interaction, and conduct a comprehensive evaluation of the self-healing of distribution system faults.

[0072] Furthermore, hierarchical protection includes hierarchical protection for different fault conditions through protection configuration and human-computer interaction, and the protection measures include primary protection and secondary protection.

[0073] The first-level protection includes that the only outgoing line of the line is a circuit breaker, there is no section protection in the main line of the line, all users are connected to the main line, the user boundary switch is a load switch, and there is no fault self-healing function. When a user fails, the power supply of the entire line is cut off for protection. After the fault is eliminated, the power supply is restored to normal by manual or automatic means.

[0074] The secondary protection includes the boundary switch on the line with a protection function. When a user fails, only the user's own power supply is cut off, and the cut-off point and fault condition are reported to the distribution system. When the fault is eliminated, the power supply is automatically restored to normal.

[0075] When a fault occurs in a Class A invalid contact line, the first-level protection is used to handle the fault.

[0076] When a fault occurs in a line with invalid Class B connection, secondary protection is used to handle the fault. When the total line load impact function value does not reach 60%, the number of triggering times of the load shedding mechanism is not accumulated.

[0077] When the first-level protection is triggered, if the power is restored manually, the operator will replace the boundary switch in the first-level protection and upgrade the first-level protection to the second-level protection. When the protection measures are triggered again, the second-level protection measures will be executed to troubleshoot the fault and restore power.

[0078] It should be noted that the comprehensive evaluation of distribution system fault self-healing includes evaluating the distribution system fault self-healing efficiency by collecting fault frequency, fault recovery time and fault impact scope, and analyzing the line operation status after the distribution system fault self-healing by collecting user feedback.

[0079] It should also be noted that the reference Figure 2 , Taking the 110 kV Tengjia Station 10 kV Tengqu East Line as an example, the only outgoing line of this line is a circuit breaker, and there is no section protection in the main line of this line. Users (public transformers) are all connected to the main line, and the user boundary switches are all load switches. In this case, the line has only primary protection and cannot achieve basic secondary protection coordination, and cannot achieve self-healing of non-fault sections (except for the outgoing line 01 pole). For such problems, priority is given to replacing the boundary switches to enable them to have protection functions and meet the secondary protection standards first. In the later stage, section circuit breakers will be installed according to actual conditions to meet the fifth (fourth) level protection standards. For lines where user boundary switches are difficult to replace, primary and secondary fusion switches are added to the main line to temporarily form secondary protection, reduce the scope of the fault, and provide conditions for distribution automation self-healing.

[0080] Example 2

[0081] An embodiment of the present invention provides a human-computer interaction and management method for self-healing of power distribution system faults. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments.

[0082] Firstly, four key distribution systems (codenamed as distribution system 1, distribution system 2, distribution system 3 and distribution system 4) were specially selected for a one-week data collection experiment. Each distribution system was equipped with high-precision sensors and remote detection equipment. At the beginning, all systems were in normal operation, and key parameters such as node voltage, node current, equipment temperature, humidity, etc. were recorded every hour. On the third day of the experiment, a fault was deliberately introduced into distribution system 3 to reduce its voltage. On the same day, distribution system 2 also failed due to external environmental factors (high temperature). The hourly data was processed to calculate and comprehensively evaluate the fault degree D of the distribution system. After the simulated fault, the fault degree D of distribution system 2 and distribution system 3 increased significantly. According to the contact point data, it was found that there was a Class B invalid contact in distribution system 3. In order to restore its normal operation, load cutting was carried out. Distribution system 2 adopted secondary protection, so when a fault occurred, only the power supply of the user itself was cut off. However, due to its Class B invalid contact line, distribution system 3 adopted primary protection, resulting in the power supply of the entire line being cut off for protection.

[0083] Referring to Table 1, the node voltage, node current, device temperature, device humidity, and fault severity are recorded.

[0084] Table 1 Test data record table

[0085]

[0086]

[0087] Through analysis of the table, the fault degree D of distribution system 3 is the highest, reaching 70%. After the simulated fault, its voltage dropped significantly and the current increased, indicating that it was greatly affected. Due to external high temperature factors, the voltage of distribution system 2 also dropped to 210V, and the fault degree reached 65%. Distribution system 1 and distribution system 4 performed stably during the experiment, the data did not change much, and the fault degree was low.

[0088] Through this actual data collection and simulation experiment, the effectiveness of our invention in real scenarios has been confirmed, especially when a fault occurs in the power distribution system, timely measures can be taken to troubleshoot and restore the system to ensure the stability of power supply. Therefore, our invention is creative.

[0089] Example 3

[0090] Reference Figure 3 , which is an embodiment of the present invention, provides a human-computer interaction and management system for self-healing of distribution system faults, including a fault analysis module, a line optimization module, and a self-healing evaluation module.

[0091] The fault analysis module is used to collect distribution system information, comprehensively evaluate the degree of distribution system faults and determine the fault conditions; the line optimization module is used to optimize the grid structure of the faulty distribution system and optimize the load transfer capacity of the distribution system through load cutting; the self-healing evaluation module is used to perform graded protection for different fault conditions through protection configuration and human-computer interaction, and conduct a comprehensive evaluation of the self-healing of distribution system faults.

[0092] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0093] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0094] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0095] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc. It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limited. Although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

[0096] 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 human-computer interaction and management method for self-healing of power distribution system faults, characterized in that: include: Collect distribution system information and determine the fault situation by comprehensively evaluating the degree of fault in the distribution system; Optimize the grid structure of the faulty distribution system and optimize the load transfer capacity of the distribution system through load shedding; Through protection configuration and human-computer interaction, graded protection is provided for different fault conditions, and a comprehensive evaluation of the self-healing of distribution system faults is conducted.

2. The human-computer interaction and management method for self-healing of power distribution system faults according to claim 1, characterized in that: The collecting of distribution system information includes collecting node voltage, node current, load data of different time periods, sensor data, power quality data, communication data and environmental condition data of the distribution system through sensors and remote detection equipment; Sensor data includes temperature and humidity of equipment and lines; Power quality data includes harmonics and waveform distortion; Environmental condition data includes ambient temperature, humidity, and wind speed.

3. The human-computer interaction and management method for self-healing of power distribution system faults according to claim 2, characterized in that: The method of judging the fault condition by comprehensively evaluating the fault degree of the power distribution system includes calculating the comprehensive evaluation fault degree D of the power distribution system based on the collected power distribution system information, which is expressed as: Where N represents the number of distribution system data samples, i represents the device serial number, f1(V i ,I i ) is expressed as a voltage and current influence function, V i Represented as the node voltage of the ith device, I i Expressed as the i-th node current, f2(P i ) is expressed as the load influence function, P i It is represented as the real-time load of the i-th device, f3(T i ,H i ) is expressed as the equipment temperature and humidity influence function, T i Represented as the temperature of the i-th device, H i Expressed as the humidity of the i-th device, f4(S a ,L w ) is expressed as the harmonic and waveform distortion influence function, S a Expressed as harmonic level, L w Expressed as waveform distortion level; The voltage and current influence function is expressed as: f1(V i ,I i )=α·|V i | p ·|I i | q Among them, α represents the correlation coefficient, p represents the node voltage index, and q represents the node current index; The load impact function is expressed as: f2(P i )=β0+β1·P i +β2·P i 2 Among them, β0, β1 and β2 are different load fitting coefficients; The equipment temperature and humidity influence function is expressed as: The harmonic and waveform distortion influence function is expressed as: When the change in D is greater than 30%, the power distribution system should be checked to determine the fault condition, confirm the fault point and the communication status.

4. The human-computer interaction and management method for self-healing of power distribution system faults according to claim 3, characterized in that: The grid structure optimization includes removing invalid connections and retaining valid connections in the faulty power distribution system to create a standard single-ring network structure. Invalid connections include Class A invalid connections and Class B invalid connections. When the contact point is a non-automated device, the contact mode is Class A invalid contact, and when the non-automated device line fails, no assistance is provided for the recovery of the non-faulty section; When the contact points are on the same section of the line, the contact mode is Class B invalid contact, and load transfer cannot be provided when a line failure occurs; When the contact point is an automation device and the contact point is not in the same segment of the line, the contact mode is effective contact. When a failure occurs in the automation device line, assistance is provided for the recovery of the non-faulty section, and the lines in the distribution system provide load transfer; Each node in the standard single-ring network structure has only two connections. When there are two valid connections among the two connections, the distribution system operates normally. When there is one Class A invalid connection and one valid connection among the two connections, the invalid connection is replaced with a valid connection. When there is one Class B invalid connection and one valid connection among the two connections, the distribution system operates normally but a fault warning is issued, and the invalid connection is replaced with a valid connection. When there is one Class A invalid connection and one Class B invalid connection among the two connections, the distribution system suspends operation, a fault warning is issued, and the invalid connection is replaced with a valid connection. When there are two Class B invalid connections among the two connections, the distribution system suspends operation, a fault warning is issued, and the invalid connection is replaced with a valid connection.

5. The human-computer interaction and management method for self-healing of power distribution system faults according to claim 4, characterized in that: The load transfer capacity optimization of the distribution system includes optimizing the load transfer capacity of the distribution system by load cutting for the line with Class B invalid connection, and measuring the load condition of the line on the Class B invalid connection; When the load impact function value in the comprehensive evaluation of the distribution system fault degree D reaches 60%, the load cutting mechanism is triggered to cut off the power supply of the faulty line equipment or area, reduce the total line load impact function value to within 60%, and store the cut-off equipment or area information; Whenever the load shedding mechanism is triggered, the system records the number of triggering times. If the same line is triggered three times cumulatively, the troubleshooting method is changed to remove invalid lines and retain valid lines. The troubleshooting record is uploaded to the distribution system, and the operator manually reviews the troubleshooting results.

6. The human-computer interaction and management method for self-healing of power distribution system faults according to claim 5, characterized in that: The hierarchical protection includes hierarchical protection for different fault conditions through protection configuration and human-machine interaction, and the protection measures include primary protection and secondary protection; Level 1 protection includes that the only outgoing line of the line is a circuit breaker, there is no section protection in the main line of the line, all users are connected to the main line, the user boundary switch is a load switch, and there is no fault self-healing function. When a user fails, the power supply of the entire line is cut off for protection, and the power supply is restored manually or automatically after the fault is eliminated. Secondary protection includes the protection function of the boundary switch on the line. When a user fails, only the power supply of the user itself is cut off, and the cut-off point and the fault situation are reported to the power distribution system. When the fault is eliminated, the power supply is automatically restored to normal; When the fault occurs in the line with invalid connection of Class A, the first-level protection is used to handle the fault; When the fault occurs in the line with invalid connection of Class B, the secondary protection is used to handle the fault. When the total load impact function value of the line does not reach 60%, the triggering times of the load shedding mechanism are not accumulated. When the first-level protection is triggered, if the power is restored manually, the operator will replace the boundary switch in the first-level protection and upgrade the first-level protection to the second-level protection. When the protection measures are triggered again, the second-level protection measures will be executed to troubleshoot the fault and restore power.

7. The human-computer interaction and management method for self-healing of power distribution system faults according to claim 6, characterized in that: The comprehensive evaluation of the distribution system fault self-healing includes evaluating the distribution system fault self-healing efficiency by collecting fault frequency, fault recovery time and fault impact range, and analyzing the line operation status of the distribution system after the distribution system fault self-healing by collecting user feedback.

8. A system using the human-computer interaction and management method for self-healing of power distribution system faults as claimed in any one of claims 1 to 7, characterized in that: Including fault analysis module, line optimization module, and self-healing evaluation module; The fault analysis module is used to collect information about the power distribution system, comprehensively evaluate the degree of faults in the power distribution system and determine the fault conditions; The line optimization module is used to optimize the grid structure of the faulty power distribution system and optimize the load transfer capacity of the power distribution system by load cutting; The self-healing evaluation module is used to perform hierarchical protection for different fault conditions through protection configuration and human-computer interaction, and to conduct a comprehensive evaluation of the self-healing of distribution system faults.

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 human-computer interaction and management method for self-healing of power distribution system faults described in 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 human-computer interaction and management method for self-healing of power distribution system faults described in any one of claims 1 to 7 are implemented.

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