Medium-voltage line tripping point setting method and system

Abstract

The invention discloses a medium-voltage line tripping point setting method and system, and relates to the technical field of tripping point setup, and the method comprises the steps: obtaining a forced tripping point of a to-be-set medium-voltage line and a total stage number of tripping points, carrying out the tripping point adaption of the to-be-set medium-voltage line according to the total stage number of the tripping points, and obtaining a plurality of initial tripping points; and when the forced tripping point is the initial tripping point, each initial tripping point is adopted as a tripping point setting result, and when the forced tripping point is not the initial tripping point, position classification adjustment is performed on the to-be-set medium-voltage line according to the forced tripping point, the total stage number of the tripping points and each initial tripping point to obtain a corresponding tripping point setting result. The technical problems that existing medium-voltage line tripping point setting is mainly based on deep neural network analysis and other schemes, but relay holding value setting personnel need to specify a specific circuit breaker as a tripping point in a special scene, so that the tripping point setting reasonability in the special scene is insufficient, and the running reliability of a medium-voltage line is reduced are solved.

Description

Technical Field

[0001] This invention relates to the field of trip point setting technology, and in particular to a method and system for setting trip points on medium-voltage lines. Background Technology

[0002] As a crucial link connecting the power transmission network and the user side, the reliability of medium-voltage distribution networks directly affects the stability of industrial production, commercial operations, and residential life. With rapid socio-economic development, users' demands for the continuity and security of power supply are constantly increasing, especially for critical users such as hospitals, data centers, and important industrial enterprises, whose tolerance for power outages is extremely low. Current-time protection, as the core protection strategy of medium-voltage distribution network circuit breakers, achieves fault isolation by setting a step-by-step relationship between current and time. The reasonable configuration of its tripping points is key to ensuring rapid fault isolation, reducing the scope of power outages, and preventing power supply disruptions for critical users during line faults.

[0003] Currently, the existing medium-voltage line trip point settings are mainly based on deep neural network analysis and loss function optimization, but they do not fully consider that some lines involve critical user power supply or have special line branch structures. In such cases, the relay setting personnel need to specify specific circuit breakers as trip points to ensure that critical user power supply is not affected or to meet specific protection coordination requirements during a fault. This results in insufficient rationality of trip point settings in special scenarios, which may lead to risks such as untimely fault clearing, expanded power outage area, or interruption of power supply to critical users, thus reducing the reliability of medium-voltage line operation. Summary of the Invention

[0004] This invention provides a method and system for setting trip points on medium-voltage lines. It solves the technical problem that existing methods for setting trip points on medium-voltage lines mainly rely on deep neural network analysis and loss function optimization, but do not fully consider situations where some lines involve critical user power supply or have special line branch structures. In such cases, relay setting personnel need to specify specific circuit breakers as trip points to ensure that critical user power supply is not affected or to meet specific protection coordination requirements during a fault. This results in insufficient rationality of trip point settings in special scenarios, which may lead to risks such as untimely fault clearing, expanded power outage area, or interruption of power supply to critical users, thus reducing the reliability of medium-voltage line operation.

[0005] The first aspect of this invention provides a method for setting a trip point on a medium-voltage line, comprising:

[0006] Obtain the forced trip point and the total number of trip points for the medium-voltage line to be set; adapt the trip points for the medium-voltage line to be set according to the total number of trip points to obtain multiple initial trip points.

[0007] When the forced trip point is the initial trip point, then each of the initial trip points is used as the trip point setting result;

[0008] When the forced trip point is not the initial trip point, the position of the medium-voltage line to be set is adjusted according to the forced trip point, the total number of trip points, and each initial trip point to obtain the corresponding trip point setting result.

[0009] Optionally, the step of adapting the trip points of the medium-voltage line to be configured according to the total number of trip point levels to obtain multiple initial trip points includes:

[0010] Based on the total number of tripping points, an initial particle swarm is constructed using the hierarchical tripping group of the medium-voltage line to be set as particles, wherein the hierarchical tripping group includes multiple tripping points;

[0011] Each hierarchical trip group corresponding to each particle in the initial particle swarm is input into a preset loss function to obtain multiple fitness values;

[0012] The initial particle swarm is updated according to each fitness level to obtain a new initial particle swarm;

[0013] When the number of updates of the initial particle swarm is greater than or equal to the preset iteration threshold, the hierarchical trip group corresponding to the minimum value among the fitness values ​​is selected as the target hierarchical trip group, and the trip point of the target hierarchical trip group is determined as the initial trip point.

[0014] When the number of updates to the initial particle swarm is less than the iteration threshold, the process jumps to the step of inputting the hierarchical gate group corresponding to each particle in the initial particle swarm into a preset loss function to obtain multiple fitnesss.

[0015] Optionally, the step of classifying and adjusting the location of the medium-voltage line to be set according to the forced tripping point, the total number of tripping point levels, and each of the initial tripping points to obtain the corresponding tripping point setting result includes:

[0016] Determine whether the number of stages at each of the initial trip points is greater than or equal to the total number of trip points;

[0017] If the number of the initial trip point is greater than or equal to the total number of trip points, then the initial trip point is determined as the total number of trip points.

[0018] When the forced trip point is at the front end of each of the initial trip points, the medium voltage line to be set is pre-interpolated and adapted based on the preset first total level, the total number of trip points, and the forced trip point to obtain the corresponding trip point setting result.

[0019] When the forced trip point is located at the rear end of any of the total trip points, the corresponding trip point setting result is determined based on the forced trip point, the total number of trip points, and each of the initial trip points.

[0020] When the forced trip point is between any two initial trip points, the medium-voltage line to be set is subjected to inter-level interpolation adaptation based on each initial trip point and the forced trip point to obtain the corresponding trip point setting result.

[0021] Optionally, the step of performing pre-interpolation and level matching on the medium-voltage line to be set based on the preset first total level, the total number of tripping points, and the forced tripping point to obtain the corresponding tripping point setting result includes:

[0022] The forced tripping point is determined as the first-level tripping point, and the medium-voltage line to be set is divided according to the location of the first-level tripping point to obtain the corresponding parent-child node line and non-parent-child node line.

[0023] Remove the front-end line of the first-level tripping point from the parent-child node lines to obtain the corresponding target parent-child node lines;

[0024] Based on the preset first total level, the tripping points of the target parent and child node lines are adapted to obtain multiple parent and child line tripping points;

[0025] The tripping points of each parent and child line are mapped and adapted to obtain multiple target tripping points;

[0026] Based on the total number of tripping points, tripping points are adapted for non-parent-child node lines to obtain multiple target tripping points;

[0027] The target trip points and the first-level trip points are used as the trip point setting results.

[0028] Optionally, the step of determining the corresponding trip point setting result based on the forced trip point, the total number of trip point levels, and each of the initial trip points includes:

[0029] The forced trip point is determined as the overall trip point;

[0030] Remove the initial trip points from each of the initial trip points whose level is equal to the total number of trip points, and use the remaining initial trip points as the target trip points;

[0031] The target trip points and the overall trip point are used as the trip point setting results.

[0032] Optionally, the step of performing inter-level interpolation adaptation on the medium-voltage line to be set according to each of the initial trip points and the forced trip points to obtain the corresponding trip point setting results includes:

[0033] Select the initial trip points that are two levels adjacent to the forced trip point from each of the initial trip points as the adjacent trip points;

[0034] The forced trip point is calibrated in stages based on the node distance between the forced trip point and each of the adjacent trip points to obtain the corresponding target forced trip point;

[0035] When the number of the initial trip point is less than the number of the target forced trip point, the initial trip point is determined as the target trip point;

[0036] The medium-voltage lines to be set are divided according to the level and location of the target forced trip point to obtain the corresponding parent-child node lines and non-parent-child node lines.

[0037] Remove the front-end line of the target forced tripping point from the parent-child node lines to obtain the corresponding target parent-child node lines;

[0038] Based on the preset first-level interval, the trip point adaptation of the target parent and child node lines is performed to obtain multiple target trip points;

[0039] Based on the preset second-level interval, the non-parent-child node lines are adapted to trip points to obtain multiple target trip points;

[0040] The target trip points and the target forced trip points are used as the trip point setting results.

[0041] A second aspect of the present invention provides a medium-voltage line trip point setting system, comprising:

[0042] The acquisition module is used to obtain the forced tripping point and the total number of tripping points of the medium-voltage line to be set, and to perform tripping point adaptation on the medium-voltage line to be set according to the total number of tripping points to obtain multiple initial tripping points;

[0043] The first setting module is used to use each of the initial trip points as the trip point setting result when the forced trip point is the initial trip point;

[0044] The second setting module is used to classify and adjust the position of the medium-voltage line to be set according to the forced trip point, the total number of trip points and each of the initial trip points when the forced trip point is not the initial trip point, so as to obtain the corresponding trip point setting result.

[0045] A third aspect of the present invention provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of the medium-voltage line trip point setting method as described above.

[0046] The fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed, implements the medium-voltage line trip point setting method as described above.

[0047] The fifth aspect of the present invention provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, wherein when the program instructions are executed by a computer, the computer performs the medium-voltage line trip point setting method as described above.

[0048] As can be seen from the above technical solutions, the present invention has the following advantages:

[0049] This invention obtains the forced tripping point and the total number of tripping point levels of the medium-voltage line to be configured. Based on the total number of tripping point levels, it adapts the tripping points to the medium-voltage line to obtain multiple initial tripping points. When a forced tripping point is an initial tripping point, each initial tripping point is used as the tripping point setting result. When a forced tripping point is not an initial tripping point, the position of the medium-voltage line to be configured is adjusted according to the forced tripping point, the total number of tripping point levels, and each initial tripping point to obtain the corresponding tripping point setting result. This overcomes the technical problem that existing medium-voltage line tripping point settings mainly rely on deep neural network analysis and loss function optimization, but do not fully consider the need for relay setting personnel to specify specific circuit breakers as tripping points in special scenarios, leading to insufficient rationality of tripping point settings in special scenarios and reduced reliability of medium-voltage line operation. Compared with existing methods for setting trip points on medium-voltage lines, this invention improves the reliability of medium-voltage line operation by classifying and adjusting the positions of the forced trip point, the total number of trip points, and each initial trip point when the forced trip point is not the initial trip point. This ensures that the forced trip point is reasonably coordinated with other trip points, avoids protection blind spots or over-tripping, and improves the reliability of medium-voltage line operation. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1This is a flowchart illustrating the steps of a method for setting a trip point on a medium-voltage line according to Embodiment 1 of the present invention.

[0052] Figure 2 This is a flowchart illustrating the steps of a method for setting a trip point on a medium-voltage line according to Embodiment 2 of the present invention.

[0053] Figure 3 This is a structural block diagram of a medium-voltage line tripping point setting system provided in Embodiment 3 of the present invention;

[0054] Figure 4 This is a structural block diagram of an electronic device provided in Embodiment 4 of the present invention. Detailed Implementation

[0055] This invention provides a method and system for setting trip points on medium-voltage lines to solve a technical problem.

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. It should be noted that in the optional embodiments of the present invention, the object information and other related data involved require the permission or consent of the object when the embodiments of the present invention are applied to specific products or technologies, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. That is to say, if the embodiments of the present invention involve data related to the object, it needs to be obtained with the authorization and consent of the object, the authorization and consent of the relevant departments, and in compliance with the relevant laws, regulations, and standards of the country and region. If personal information is involved in the embodiments, the acquisition of all personal information requires the consent of the individual. If sensitive information is involved, the separate consent of the information subject is required, and the embodiments also need to be implemented with the authorization and consent of the object.

[0057] Please see Figure 1 , Figure 1 The flowchart illustrates the steps of a method for setting a trip point on a medium-voltage line according to Embodiment 1 of the present invention.

[0058] This invention provides a method for setting a trip point on a medium-voltage line, comprising:

[0059] Step 101: Obtain the forced trip point and the total number of trip points for the medium-voltage line to be set. Based on the total number of trip points, perform trip point adaptation for the medium-voltage line to be set to obtain multiple initial trip points.

[0060] A forced trip point refers to a circuit breaker node that must be designated as a trip point by the relay protection setting personnel based on the special needs of the line (such as power supply guarantee for key users, special protection coordination requirements, etc.).

[0061] The total number of tripping levels refers to the total number of tripping levels that need to be set according to the protection requirements of medium-voltage lines. It usually does not exceed 3 levels and supports adjustable parameters.

[0062] The initial trip point refers to the trip point that meets the requirements of conventional protection.

[0063] In this embodiment of the invention, the forced tripping points and the total number of tripping point levels of the medium-voltage line to be configured are obtained. Based on the total number of tripping point levels, an initial particle swarm is constructed using the hierarchical tripping groups of the medium-voltage line to be configured as particles. The hierarchical tripping groups corresponding to each particle in the initial particle swarm are input into a preset loss function to obtain multiple fitness values. Based on the particle swarm optimization algorithm, the initial particle swarm is iteratively optimized according to each fitness value to obtain multiple initial tripping points.

[0064] In another embodiment, the forced trip point and the total number of trip point levels of the medium-voltage line to be set are obtained, and the initial trip point corresponding to the medium-voltage line to be set is determined by a fully automatic setting method based on the total number of trip point levels.

[0065] It should be noted that the fully automatic setting method is as follows: The total number of tripping levels is input into a preset protection ratio list to obtain multiple protection ratios (e.g., if the total number of tripping levels is 3, then the total number of tripping levels is input into the preset protection ratio list to obtain the first-level protection ratio, second-level protection ratio, and third-level protection ratio). Based on the preset target load function, the load parameters of each circuit breaker node in the medium-voltage line to be set are calculated. The target load function is as follows:

[0066]

[0067] in, Let kI be the load parameters of the circuit breaker node. Let k be the number of cables at the downstream end of the kI-th circuit breaker node. Let k be the number of overhead lines at the kI-th circuit breaker node. Let kI be the number of transformers at the kI-th circuit breaker node. The number of dedicated power rooms for the kI-th circuit breaker node. As the first weighting coefficient, This is the second weighting coefficient. The third weighting coefficient, The fourth weighting coefficient is denoted by kI, and kI is the index of the circuit breaker node. The various load parameters are summed to obtain the total line load parameter. The total line load parameter and each protection percentage are multiplied to obtain multiple protection levels. Trip points are set for the medium-voltage line to be protected according to each protection level (e.g., for level one trip point: from all circuit breaker nodes of the medium-voltage line to be protected, select the node whose load parameter is closest to the level one protection level, remove the parent / child nodes of that node, and continue filtering until no nodes remain. For level two and above trip points: use the previous level trip point as the parent node, and among its child nodes, select the node whose load parameter is closest to the corresponding protection level, repeating the removal and filtering operations. All filtered nodes are used as initial trip points), resulting in multiple initial trip points.

[0068] Step 102: When the forced trip point is the initial trip point, then each initial trip point is used as the trip point setting result.

[0069] In this embodiment of the invention, when the forced trip point is completely consistent with any initial trip point, each initial trip point is taken as the final trip point setting result.

[0070] Step 103: When the forced trip point is not the initial trip point, the position of the medium-voltage line to be set is adjusted according to the forced trip point, the total number of trip point levels and each initial trip point, so as to obtain the corresponding trip point setting result.

[0071] In this embodiment of the invention, when the forced trip point is inconsistent with each of the initial trip points, the position of the medium-voltage line to be set is adjusted according to the forced trip point, the total number of trip point levels and each of the initial trip points to obtain the corresponding trip point setting result.

[0072] In this embodiment of the invention, the forced tripping point and the total number of tripping point levels of the medium-voltage line to be configured are obtained. Tripping point adaptation is performed on the medium-voltage line to be configured based on the total number of tripping point levels, resulting in multiple initial tripping points. When the forced tripping point is an initial tripping point, each initial tripping point is used as the tripping point setting result. When the forced tripping point is not an initial tripping point, the position of the medium-voltage line to be configured is adjusted according to the forced tripping point, the total number of tripping point levels, and each initial tripping point, resulting in the corresponding tripping point setting result. This overcomes the technical problem that existing medium-voltage line tripping point settings are mainly based on deep neural network analysis and loss function optimization, but do not fully consider the need for relay setting personnel to specify specific circuit breakers as tripping points in special scenarios, leading to insufficient rationality of tripping point settings in special scenarios and reducing the reliability of medium-voltage line operation. Compared with existing methods for setting trip points on medium-voltage lines, this invention improves the reliability of medium-voltage line operation by classifying and adjusting the positions of the forced trip point, the total number of trip points, and each initial trip point when the forced trip point is not the initial trip point. This ensures that the forced trip point is reasonably coordinated with other trip points, avoids protection blind spots or over-tripping, and improves the reliability of medium-voltage line operation.

[0073] Please see Figure 2 , Figure 2 This is a flowchart illustrating the steps of a method for setting a trip point on a medium-voltage line according to Embodiment 2 of the present invention.

[0074] This invention provides a method for setting a trip point on a medium-voltage line, comprising:

[0075] Step 201: Obtain the forced trip point and the total number of trip points for the medium-voltage line to be set. Based on the total number of trip points, perform trip point adaptation for the medium-voltage line to be set to obtain multiple initial trip points.

[0076] Further, step 201 includes the following sub-steps:

[0077] S11. Based on the total number of tripping points, construct an initial particle swarm using the hierarchical tripping groups of the medium-voltage lines to be set as particles, wherein the hierarchical tripping groups include multiple tripping points.

[0078] Hierarchical trip groups refer to the trip point setting scheme for each circuit breaker node in a medium-voltage line to be configured.

[0079] In this embodiment of the invention, based on the total number of tripping points, an initial particle swarm is constructed using the hierarchical tripping group of the medium-voltage line to be configured (for example, if the total number of tripping points is 2, and there are three circuit breaker nodes in the medium-voltage line to be configured, then the hierarchical tripping group is a tripping point configuration scheme for the three circuit breaker nodes (such as the first circuit breaker node being a first-level tripping point, the second circuit breaker node not being a tripping point, and the third circuit breaker node being a second-level tripping point) as particles.

[0080] S12. Input the hierarchical tripping group corresponding to each particle in the initial particle swarm into the preset loss function to obtain multiple fitnesss.

[0081] In this embodiment of the invention, a preset loss function is input using the hierarchical gate group corresponding to each particle in the initial particle swarm to obtain multiple fitness values.

[0082] It should be noted that the loss function is as follows:

[0083]

[0084] in, For fitness, As the first weighting coefficient, This is the second weighting coefficient. The third weighting coefficient, The value of the loss due to the fault. To protect the matching loss value, To protect the blind spot loss value, Let j be the action time of the i-th trip point. Minimum fault clearing time for equipment. Let j be the load importance of node j. Let j be the historical failure probability. The power outage length is when the i-th trip point j is activated. This is the total length of the line. Let node j be the selection variable for the i-th level trip point (1 for selection, 0 for no selection). Let j be the operating current threshold of the i-th tripping point. The operating current threshold of the (i-1)th tripping point k is... The action time of the (i-1)th trip point k is... This is the standard current level difference coefficient. The standard time difference coefficient, Let be the effective protection length of the i-th trip point j, M be the total number of circuit breaker nodes on the line, N be the total number of trip point levels to be set, i be the first index of the node, j be the second index of the node, and k be the third index of the node.

[0085] S13. Update the initial particle swarm according to each fitness to obtain a new initial particle swarm.

[0086] In this embodiment of the invention, the initial particle swarm is updated based on the update rules of the particle swarm optimization algorithm, combining the current position and velocity of the particles with the position information of the globally optimal particle and the individually optimal particle. The globally optimal particle refers to the particle with the lowest fitness in the entire particle swarm, and its corresponding hierarchical tripping group is the current swarm optimal solution. The individually optimal particle refers to the particle corresponding to the historical position with the lowest fitness during its own iteration process. During the update, the new velocity of each particle is calculated first based on preset inertia weights, cognitive learning factors, and social learning factors. The inertia weights are used to balance the global and local search capabilities of the particles. The cognitive learning factor reflects the particle's tendency to learn from its own historical optimal position, and the social learning factor reflects the particle's tendency to learn from the globally optimal position. The calculation of the new velocity needs to comprehensively consider the particle's current velocity, the difference between the individually optimal position and the current position, and the difference between the globally optimal position and the current position. Then, based on the calculated new velocity, adjust the hierarchical trip group combination (i.e., particle position) corresponding to each particle to make the particles move towards a better trip point combination. At the same time, set a velocity limit threshold to avoid excessive particle velocity leading to search divergence. Set position constraints to ensure that the adjusted hierarchical trip group meets the actual distribution of medium-voltage line circuit breaker nodes and protection logic requirements. Finally, a new initial particle swarm containing the new hierarchical trip group combination is obtained.

[0087] It should be noted that particle swarm optimization is an optimization algorithm based on swarm intelligence. It searches for the optimal solution through information sharing and cooperation among particles and is suitable for complex combinatorial optimization problems.

[0088] S14. When the number of updates of the initial particle swarm is greater than or equal to the preset iteration threshold, the hierarchical trip group corresponding to the minimum value among each fitness is selected as the target hierarchical trip group, and the trip point of the target hierarchical trip group is determined as the initial trip point.

[0089] The number of updates refers to the number of rounds in which the particle position and velocity are adjusted in the particle swarm optimization algorithm.

[0090] The iteration threshold refers to the critical value for algorithm termination set based on the complexity of medium-voltage lines, computational accuracy requirements, and efficiency balance.

[0091] In this embodiment of the invention, when the number of updates of the initial particle swarm is greater than or equal to a preset iteration threshold, the hierarchical trip group corresponding to the minimum value among each fitness is selected as the target hierarchical trip group, and the trip point of the target hierarchical trip group is determined as the initial trip point.

[0092] S15. When the number of updates of the initial particle swarm is less than the iteration threshold, the process jumps to the step of inputting the hierarchical gate group corresponding to each particle in the initial particle swarm into the preset loss function to obtain multiple fitnesss.

[0093] In this embodiment of the invention, when the number of updates of the initial particle swarm is less than the iteration threshold, the process jumps to execute S12.

[0094] Step 202: When the forced trip point is the initial trip point, then each initial trip point is used as the trip point setting result.

[0095] In this embodiment of the invention, when the forced trip point is exactly the same as any initial trip point, each initial trip point is used as the final trip point setting result.

[0096] Step 203: When the forced trip point is not the initial trip point, determine whether the number of each initial trip point is greater than or equal to the total number of trip points.

[0097] The level of the initial trip point refers to the level to which the initial trip point belongs in the preset graded protection system.

[0098] In this embodiment of the invention, when the forced trip point is not the initial trip point, it is determined whether the number of stages of each initial trip point is equal to the total number of trip points.

[0099] Step 204: If the number of tripping levels of the initial tripping point is greater than or equal to the total number of tripping levels, then the initial tripping point is determined as the total tripping point.

[0100] The total trip point refers to the trip point whose number is equal to the total number of trip points.

[0101] In this embodiment of the invention, when the number of the initial trip point is equal to the total number of trip points, the initial trip point is determined as the total number of trip points.

[0102] Step 205: When the forced trip point is at the front end of each initial trip point, the pre-interpolation and leveling adaptation is performed based on the preset first total level, total number of trip points, and forced trip point for the medium voltage line to be set, to obtain the corresponding trip point setting result.

[0103] Furthermore, step 205 includes the following sub-steps:

[0104] S21. The forced trip point is determined as the first-level trip point, and the medium-voltage line to be set is divided according to the location of the first-level trip point to obtain the corresponding parent-child node line and non-parent-child node line.

[0105] A level 1 trip point refers to a trip point with a level of 1.

[0106] In this embodiment of the invention, the forced tripping point is determined as the primary tripping point, and the physical installation location and line topology connection relationship of the primary tripping point are used as the dividing benchmark to divide the medium-voltage line to be installed into segments. The line segments that form a direct power supply link with the primary tripping point are the parent-child node lines (the power supply logic of this line segment extends hierarchically with the primary tripping point as the core), while the line segments that do not have a direct power supply link with the primary tripping point and are distributed in parallel as branches are the non-parent-child node lines.

[0107] S22. Remove the front-end lines of the first-level tripping point from the parent-child node lines to obtain the corresponding target parent-child node lines.

[0108] In this embodiment of the invention, the front-end line of the first-level trip point is removed from the parent-child node line, and the remaining line extending from the first-level trip point to the back end is determined as the target parent-child node line.

[0109] S23. Based on the preset first total level, the tripping points of the target parent and child node lines are adapted to obtain multiple parent and child line tripping points.

[0110] The first total level refers to the preset level standard for the tripping point adaptation of the target parent and child node lines, which matches the total level of tripping points (usually the total level of tripping points minus 1).

[0111] In this embodiment of the invention, based on the preset first total number of steps, the initial trip point of the target parent-child node line is determined by the trip point adaptation method or the fully automatic setting method in step 201, and the initial trip point of the target parent-child node line is used as the trip point of the parent-child line.

[0112] S24. Map and adapt the tripping points of each parent and child line to obtain multiple target tripping points.

[0113] In this embodiment of the invention, the tripping points of each parent and child line are mapped and adapted to obtain multiple target tripping points. For example, if the level of a certain parent and child line tripping point is 1, after mapping and adapting this parent and child line tripping point, a tripping point with a level of 2 is obtained as the target tripping point.

[0114] S25. Based on the total number of tripping points, perform tripping point adaptation on non-parent-child node lines to obtain multiple target tripping points.

[0115] In this embodiment of the invention, based on the total number of tripping points, the initial tripping point of the non-parent-child node line is determined by the tripping point adaptation method or the fully automatic setting method in step 201, and the initial tripping point of the non-parent-child node line is taken as the target tripping point.

[0116] S26. Use each target trip point and the first-level trip point as the trip point setting result.

[0117] In this embodiment of the invention, each target trip point and the first-level trip point are determined as the trip point setting result corresponding to the medium-voltage line to be set.

[0118] Step 206: When the forced trip point is at the rear end of any general trip point, the corresponding trip point setting result is determined according to the forced trip point, the total number of trip points, and each initial trip point.

[0119] Furthermore, step 206 includes the following sub-steps:

[0120] S31. The forced trip point is determined as the main trip point.

[0121] In this embodiment of the invention, when the forced trip point is located at the rear end of any master trip point, the forced trip point is taken as the master trip point.

[0122] S32. Remove the initial trip points from each initial trip point whose number of stages equals the total number of trip points, and use the remaining initial trip points as the target trip points.

[0123] In this embodiment of the invention, all initial trip points are traversed and their corresponding levels are checked. Initial trip points with the same level as the total number of trip points are accurately selected and eliminated. The remaining initial trip points (whose levels are all less than the total number of trip points) are used as target trip points.

[0124] It is worth mentioning that since the forced trip point has replaced the protection function of the initial trip point with a number equal to the total number of trip points, this part of the initial trip point needs to be removed from the initial trip point.

[0125] S33. Use each target trip point and the overall trip point as the trip point setting result.

[0126] In this embodiment of the invention, each target trip point and the main trip point are determined as the trip point setting result corresponding to the medium-voltage line to be set.

[0127] Step 207: When the forced trip point is between any two initial trip points, inter-level interpolation adaptation is performed on the medium-voltage line to be set according to each initial trip point and the forced trip point to obtain the corresponding trip point setting result.

[0128] Furthermore, step 207 includes the following sub-steps:

[0129] S41. Select the initial trip points of the two levels adjacent to the forced trip point from each initial trip point as the adjacent level trip points.

[0130] The initial trip points of two adjacent levels refer to two initial trip points that are consecutive in level (such as level 1 and level 2) and whose physical locations are located on both sides of the forced trip point.

[0131] In this embodiment of the invention, when the forced trip point is between any two initial trip points, two initial trip points located on both sides of the forced trip point and whose levels are consecutively adjacent are selected from each initial trip point as adjacent trip points.

[0132] S42. Based on the node distance between the forced trip point and each adjacent trip point, the forced trip point is calibrated in stages to obtain the corresponding target forced trip point.

[0133] The target forced trip point refers to the forced trip point after the level calibration.

[0134] In this embodiment of the invention, the node distance between the forced trip point and each adjacent trip point (i.e., the number of circuit breaker switch nodes included between each adjacent trip point and the forced trip point) is calculated respectively. Then, the two node distances are compared. If the node distance between the forced trip point and the preceding adjacent trip point (the adjacent trip point with a lower level) is less than or equal to the node distance with the following adjacent trip point (the adjacent trip point with a higher level), then the forced trip point is marked as having the same level as the preceding adjacent trip point. If the node distance between the forced trip point and the preceding adjacent trip point is greater than the node distance with the following adjacent trip point, then the forced trip point is marked as having the same level as the following adjacent trip point.

[0135] S43. When the number of the initial trip point is less than the number of the target forced trip point, the initial trip point is determined as the target trip point.

[0136] In this embodiment of the invention, when the level of the initial trip point is less than the level of the target forced trip point, it indicates that the level of the initial trip point is before the target forced trip point, its protection range and level difference coordination logic do not conflict with the target forced trip point, and it can provide effective protection for the front end of the line. Therefore, the initial trip point is determined as the target trip point.

[0137] S44. Divide the medium-voltage lines to be set up according to the level and location of the target forced trip point to obtain the corresponding parent-child node lines and non-parent-child node lines.

[0138] In this embodiment of the invention, the target forced tripping point is used as the core dividing benchmark to divide the medium-voltage line to be set into segments. The line segments that form a direct upstream and downstream power supply link with the target forced tripping point and whose power supply logic extends in a hierarchical manner are the parent-child node lines. The line segments that have no direct power supply connection with the target forced tripping point, are distributed in parallel branches, and are independent of their upstream and downstream links are the non-parent-child node lines.

[0139] S45. Remove the front-end line of the target forced trip point from the parent-child node lines to obtain the corresponding target parent-child node lines.

[0140] In this embodiment of the invention, based on the current supply direction of the line and the physical installation location of the target forced trip point, the front-end line is identified as a line segment that is close to the power supply side, does not pass through the trip point, and is connected to the parent-child node line. This part of the front-end line is directly removed from the divided parent-child node lines, and the remaining line segment that extends from the target forced trip point to the downstream user side and maintains a direct upstream and downstream power supply connection is identified as the target parent-child node line.

[0141] S46. Based on the preset first-level interval, the tripping point of the target parent and child node lines is adapted to obtain multiple target tripping points.

[0142] The first level interval refers to the level interval that matches the total number of trip points and the target number of forced trip points, i.e., the first level interval = [target number of forced trip points, total number of trip points].

[0143] In this embodiment of the invention, based on the preset first level interval, the trip point adaptation method or fully automatic setting method of step 201 is used to determine the initial trip point corresponding to the target parent-child node line, and the initial trip point corresponding to the target parent-child node line is determined as the target trip point.

[0144] S47. Based on the preset second-level interval, the trip point adaptation of non-parent-child node lines is performed to obtain multiple target trip points.

[0145] The second level interval refers to the level interval that matches the total number of trip points and the target number of forced trip points, that is, the second level interval = [target number of forced trip points + 1, total number of trip points].

[0146] In this embodiment of the invention, based on the preset second-level interval, the trip point adaptation method or fully automatic setting method of step 201 is used to determine the initial trip point corresponding to the non-parent-child node line, and the initial trip point corresponding to the non-parent-child node line is determined as the target trip point.

[0147] S48. Use each target trip point and target forced trip point as the trip point setting result.

[0148] In this embodiment of the invention, each target trip point and target forced trip point is determined as the trip point setting result corresponding to the medium-voltage line to be set.

[0149] In this embodiment of the invention, the forced tripping point and the total number of tripping point levels of the medium-voltage line to be configured are obtained. Tripping point adaptation is performed on the medium-voltage line to be configured based on the total number of tripping point levels, resulting in multiple initial tripping points. When the forced tripping point is an initial tripping point, each initial tripping point is used as the tripping point setting result. When the forced tripping point is not an initial tripping point, the position of the medium-voltage line to be configured is adjusted according to the forced tripping point, the total number of tripping point levels, and each initial tripping point, resulting in the corresponding tripping point setting result. This overcomes the technical problem that existing medium-voltage line tripping point settings are mainly based on deep neural network analysis and loss function optimization, but do not fully consider the need for relay setting personnel to specify specific circuit breakers as tripping points in special scenarios, leading to insufficient rationality of tripping point settings in special scenarios and reducing the reliability of medium-voltage line operation. Compared with existing methods for setting trip points on medium-voltage lines, this invention improves the reliability of medium-voltage line operation by classifying and adjusting the positions of the forced trip point, the total number of trip points, and each initial trip point when the forced trip point is not the initial trip point. This ensures that the forced trip point is reasonably coordinated with other trip points, avoids protection blind spots or over-tripping, and improves the reliability of medium-voltage line operation.

[0150] Please see Figure 3 , Figure 3 This is a structural block diagram of a medium-voltage line tripping point setting system provided in Embodiment 3 of the present invention.

[0151] This invention provides a medium-voltage line trip point setting system, comprising:

[0152] The acquisition module 301 is used to acquire the forced trip point and the total number of trip points of the medium-voltage line to be set, and to perform trip point adaptation on the medium-voltage line to be set according to the total number of trip points to obtain multiple initial trip points;

[0153] The first setting module 302 is used to use each initial trip point as the trip point setting result when the forced trip point is the initial trip point;

[0154] The second setting module 303 is used to classify and adjust the position of the medium-voltage line to be set according to the forced trip point, the total number of trip point levels and each initial trip point when the forced trip point is not the initial trip point, so as to obtain the corresponding trip point setting result.

[0155] Furthermore, the acquisition module 301 includes:

[0156] A submodule is constructed to build an initial particle swarm based on the total number of tripping points, using the hierarchical tripping groups of the medium-voltage line to be configured as particles. The hierarchical tripping groups include multiple tripping points.

[0157] The adaptation submodule is used to input the hierarchical gate group corresponding to each particle in the initial particle swarm into a preset loss function to obtain multiple fitness values.

[0158] The update submodule is used to update the initial particle swarm based on each fitness level to obtain a new initial particle swarm.

[0159] The optimization submodule is used to select the hierarchical trip group corresponding to the minimum value among each fitness as the target hierarchical trip group when the number of updates of the initial particle swarm is greater than or equal to the preset iteration threshold, and to determine the trip point of the target hierarchical trip group as the initial trip point.

[0160] When the number of updates to the initial particle swarm is less than the iteration threshold, the process jumps to the step of inputting the hierarchical gate group corresponding to each particle in the initial particle swarm into the preset loss function to obtain multiple fitness values.

[0161] Furthermore, the second setting module 303 includes:

[0162] The analysis submodule is used to determine whether the number of stages at each initial trip point is greater than or equal to the total number of trip points;

[0163] If the number of initial trip points is greater than or equal to the total number of trip points, then the initial trip point is determined as the total number of trip points;

[0164] The first setting submodule is used to perform front-end positioning and adaptation based on the preset first total level, total number of trip points, and forced trip point for the medium-voltage line to be set when the forced trip point is at the front end of each initial trip point, so as to obtain the corresponding trip point setting result.

[0165] The second setting submodule is used to determine the corresponding trip point setting result based on the forced trip point, the total number of trip points, and each initial trip point when the forced trip point is at the rear end of any total trip point.

[0166] The third setting submodule is used to perform inter-level interpolation adaptation based on each initial trip point and the forced trip point when the forced trip point is between any two initial trip points, so as to obtain the corresponding trip point setting result.

[0167] Furthermore, the first setting submodule includes:

[0168] The first division unit is used to determine the forced trip point as the first-level trip point, and divide the medium-voltage line to be set according to the location of the first-level trip point to obtain the corresponding parent-child node line and non-parent-child node line.

[0169] The first screening unit is used to remove the front-end lines of the first-level tripping point from the parent-child node lines to obtain the corresponding target parent-child node lines.

[0170] The first setting unit is used to adapt the tripping points of the target parent-child node lines according to the preset first total level, and obtain multiple parent-child line tripping points.

[0171] Map and adapt the tripping points of each parent and child line to obtain multiple target tripping points;

[0172] Trip point adaptation is performed on non-parent-child node lines based on the total number of trip points to obtain multiple target trip points;

[0173] The trip point settings are based on the target trip points and the first-level trip points.

[0174] Furthermore, the second setting submodule includes:

[0175] The second screening unit is used to determine the forced trip point as the overall trip point;

[0176] Remove the initial trip points from each initial trip point whose number of stages equals the total number of trip points, and use the remaining initial trip points as the target trip points;

[0177] The second setting unit is used to use each target trip point and the overall trip point as the trip point setting result.

[0178] Furthermore, the third setting submodule includes:

[0179] The third screening unit is used to select the initial trip points two levels adjacent to the forced trip point from each initial trip point as the adjacent trip points;

[0180] The series calibration unit is used to perform series calibration on the forced trip point based on the node distance between the forced trip point and each adjacent trip point, so as to obtain the corresponding target forced trip point;

[0181] If the number of the initial trip point is less than the number of the target forced trip point, then the initial trip point is determined as the target trip point;

[0182] The second division unit is used to divide the medium-voltage line to be set according to the level and location of the target forced trip point, and obtain the corresponding parent-child node line and non-parent-child node line.

[0183] Remove the front-end line of the target forced trip point from the parent-child node lines to obtain the corresponding target parent-child node lines;

[0184] The third setting unit is used to adapt the tripping points of the target parent and child node lines according to the preset first-level interval to obtain multiple target tripping points.

[0185] Based on the preset second-level interval, tripping points are adapted for non-parent-child node lines to obtain multiple target tripping points;

[0186] The trip point settings are determined by using the target trip points and the target forced trip points.

[0187] Please see Figure 4 , Figure 4 This is a structural block diagram of an electronic device provided in Embodiment 4 of the present invention.

[0188] An electronic device according to an embodiment of the present invention includes: a memory 401 and a processor 402. The memory 401 stores a computer program. When the computer program is executed by the processor 402, the processor 402 performs the medium-voltage line trip point setting method as described in any of the above embodiments.

[0189] Memory 401 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Memory 401 has storage space 403 for program code 413 for performing any of the method steps described above. For example, storage space 403 for program code may include individual program codes 413 for implementing the various steps in the methods described above. This program code may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, CDs, memory cards, or floppy disks. The program code may be compressed, for example, in a suitable form. When run by a computing processing device, this code causes the computing processing device to perform the various steps in the methods described above. This program code may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, CDs, memory cards, or floppy disks. The program code may be compressed, for example, in a suitable form. When these codes are run by a computing processing device, the device causes it to execute the various steps in the medium-voltage line trip point setting method described above.

[0190] Embodiment 5 of the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the medium-voltage line trip point setting method as described in any of the above embodiments.

[0191] Embodiment 6 of the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer performs the medium-voltage line trip point setting method as described in any of the above embodiments.

[0192] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0193] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0194] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0195] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0196] If the integrated unit is implemented as 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, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0197] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for setting trip points on medium-voltage lines, characterized in that, include: Obtain the forced trip point and the total number of trip points for the medium-voltage line to be set; adapt the trip points for the medium-voltage line to be set according to the total number of trip points to obtain multiple initial trip points. When the forced trip point is the initial trip point, then each of the initial trip points is used as the trip point setting result; When the forced trip point is not the initial trip point, the position of the medium-voltage line to be set is adjusted according to the forced trip point, the total number of trip points, and each initial trip point to obtain the corresponding trip point setting result.

2. The method for setting trip points on medium-voltage lines according to claim 1, characterized in that, The step of adapting the trip points of the medium-voltage line to be configured according to the total number of trip point levels to obtain multiple initial trip points includes: Based on the total number of tripping points, an initial particle swarm is constructed using the hierarchical tripping group of the medium-voltage line to be set as particles, wherein the hierarchical tripping group includes multiple tripping points; Each hierarchical trip group corresponding to each particle in the initial particle swarm is input into a preset loss function to obtain multiple fitness values; The initial particle swarm is updated according to each fitness level to obtain a new initial particle swarm; When the number of updates of the initial particle swarm is greater than or equal to the preset iteration threshold, the hierarchical trip group corresponding to the minimum value among the fitness values ​​is selected as the target hierarchical trip group, and the trip point of the target hierarchical trip group is determined as the initial trip point. When the number of updates to the initial particle swarm is less than the iteration threshold, the process jumps to the step of inputting the hierarchical gate group corresponding to each particle in the initial particle swarm into a preset loss function to obtain multiple fitnesss.

3. The method for setting trip points on medium-voltage lines according to claim 1, characterized in that, The step of classifying and adjusting the location of the medium-voltage line to be set according to the forced tripping point, the total number of tripping point levels, and each of the initial tripping points to obtain the corresponding tripping point setting result includes: Determine whether the number of stages at each of the initial trip points is greater than or equal to the total number of trip points; If the number of the initial trip point is greater than or equal to the total number of trip points, then the initial trip point is determined as the total number of trip points. When the forced trip point is at the front end of each of the initial trip points, the medium voltage line to be set is pre-interpolated and adapted based on the preset first total level, the total number of trip points, and the forced trip point to obtain the corresponding trip point setting result. When the forced trip point is located at the rear end of any of the total trip points, the corresponding trip point setting result is determined based on the forced trip point, the total number of trip points, and each of the initial trip points. When the forced trip point is between any two initial trip points, the medium-voltage line to be set is subjected to inter-level interpolation adaptation based on each initial trip point and the forced trip point to obtain the corresponding trip point setting result.

4. The method for setting the trip point of a medium-voltage line according to claim 3, characterized in that, The step of performing pre-interpolation and level matching on the medium-voltage line to be set based on the preset first total level, the total number of tripping points, and the forced tripping point to obtain the corresponding tripping point setting result includes: The forced tripping point is determined as the first-level tripping point, and the medium-voltage line to be set is divided according to the location of the first-level tripping point to obtain the corresponding parent-child node line and non-parent-child node line. Remove the front-end line of the first-level tripping point from the parent-child node lines to obtain the corresponding target parent-child node lines; Based on the preset first total level, the tripping points of the target parent and child node lines are adapted to obtain multiple parent and child line tripping points; The tripping points of each parent and child line are mapped and adapted to obtain multiple target tripping points; Based on the total number of tripping points, tripping points are adapted for non-parent-child node lines to obtain multiple target tripping points; The target trip points and the first-level trip points are used as the trip point setting results.

5. The method for setting the trip point of a medium-voltage line according to claim 3, characterized in that, The step of determining the corresponding trip point setting result based on the forced trip point, the total number of trip point levels, and each of the initial trip points includes: The forced trip point is determined as the overall trip point; Remove the initial trip points from each of the initial trip points whose level is equal to the total number of trip points, and use the remaining initial trip points as the target trip points; The target trip points and the overall trip point are used as the trip point setting results.

6. The method for setting the trip point of a medium-voltage line according to claim 3, characterized in that, The step of performing inter-level interpolation adaptation on the medium-voltage line to be set according to each of the initial trip points and the forced trip points to obtain the corresponding trip point setting results includes: Select the initial trip points that are two levels adjacent to the forced trip point from each of the initial trip points as the adjacent trip points; The forced trip point is calibrated in stages based on the node distance between the forced trip point and each of the adjacent trip points to obtain the corresponding target forced trip point; When the number of the initial trip point is less than the number of the target forced trip point, the initial trip point is determined as the target trip point; The medium-voltage lines to be set are divided according to the level and location of the target forced trip point to obtain the corresponding parent-child node lines and non-parent-child node lines. Remove the front-end line of the target forced tripping point from the parent-child node lines to obtain the corresponding target parent-child node lines; Based on the preset first-level interval, the trip point adaptation of the target parent and child node lines is performed to obtain multiple target trip points; Based on the preset second-level interval, the non-parent-child node lines are adapted to trip points to obtain multiple target trip points; The target trip points and the target forced trip points are used as the trip point setting results.

7. A medium-voltage line trip point setting system, characterized in that, include: The acquisition module is used to obtain the forced tripping point and the total number of tripping points of the medium-voltage line to be set, and to perform tripping point adaptation on the medium-voltage line to be set according to the total number of tripping points to obtain multiple initial tripping points; The first setting module is used to use each of the initial trip points as the trip point setting result when the forced trip point is the initial trip point; The second setting module is used to classify and adjust the position of the medium-voltage line to be set according to the forced trip point, the total number of trip points and each of the initial trip points when the forced trip point is not the initial trip point, so as to obtain the corresponding trip point setting result.

8. An electronic device, characterized in that, The system includes a memory and a processor. The memory stores a computer program, which, when executed by the processor, causes the processor to perform the steps of the medium-voltage line trip point setting method as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed, it implements the medium-voltage line trip point setting method as described in any one of claims 1-6.

10. A computer program product, characterized in that, The computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions, wherein when the program instructions are executed by a computer, the computer performs the medium-voltage line trip point setting method as described in any one of claims 1-6.

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