A method, device, and terminal for visualizing circuit breaker line protection parameters.

Abstract

This invention belongs to the field of circuit breaker visualization processing technology, and provides a method, device, terminal, and storage medium for visualizing circuit breaker line protection parameters. The method acquires the circuit breaker's line protection parameters, determines the key points of the circuit breaker's tripping curve, including the curve's starting point, first tripping point, first intersection point, second tripping point, second intersection point, third tripping point, and curve endpoint. Based on these key points, a visualized circuit breaker tripping curve is generated, comprising L-protection curves, S-protection curves, and I-protection curves. By visualizing the line protection parameters, this invention can intuitively display the circuit breaker's tripping characteristics, enabling maintenance personnel to easily understand the circuit breaker's tripping characteristics and identify potential anomalies in the circuit breaker's line protection parameter settings based on the tripping curve.

Description

Technical Field

[0001] This invention belongs to the field of circuit breaker visualization processing technology, and particularly relates to a method, device and terminal for visual processing of circuit breaker line protection parameters. Background Technology

[0002] A circuit breaker is a switching device that can close, carry, and interrupt current under normal circuit conditions, and can close, carry, and interrupt current under abnormal circuit conditions within a specified time. It has a wide range of applications in power distribution systems.

[0003] Currently, circuit breakers typically require three protection settings, with corresponding line protection parameters as follows: overload long delay (L parameter), short circuit short delay (S parameter), and short circuit instantaneous (I parameter). In practical applications, maintenance personnel frequently need to adjust the line protection parameters of the circuit breaker.

[0004] However, in actual settings, due to the large number of power grid devices and parameters to be set, on the one hand, maintenance personnel are prone to setting errors when setting parameters; on the other hand, the set parameters cannot be visually checked and abnormal parameters cannot be found, resulting in unreasonable circuit breaker line protection parameter settings, which may cause abnormal shutdown of the circuit breaker. Summary of the Invention

[0005] This invention provides a method, device, terminal, and computer-readable storage medium for visual processing of circuit breaker line protection parameters. This addresses the problem that in the prior art, when setting circuit breaker line protection parameters, setting errors are prone to occur, and abnormal parameters cannot be intuitively checked and detected, leading to unreasonable circuit breaker line protection parameter settings and potentially causing abnormal circuit breaker shutdown.

[0006] In a first aspect, the present invention provides a method for visualizing circuit breaker line protection parameters, comprising:

[0007] Obtain the line protection parameters of the circuit breaker, including: L protection current, S protection current, S protection time, I protection current and I protection time;

[0008] Based on the line protection parameters, determine the key points of the circuit breaker tripping curve, wherein the key points include the curve start point, the first tripping point, the first intersection point, the second tripping point, the second intersection point, the third tripping point, and the curve end point;

[0009] A visualized circuit breaker tripping curve is generated based on the key points. The circuit breaker tripping curve includes an L protection curve, an S protection curve, and an I protection curve. The L protection curve starts from the curve starting point, passes through the first tripping point, and ends at the first intersection point. The S protection curve starts from the first intersection point, passes through the second tripping point, and ends at the second intersection point. The I protection curve starts from the second intersection point, passes through the third tripping point, and ends at the curve endpoint.

[0010] Secondly, the present invention provides a visualization processing device for circuit breaker line protection parameters, comprising:

[0011] The parameter acquisition unit is used to acquire the line protection parameters of the circuit breaker, which include: L protection current, S protection current, S protection time, I protection current and I protection time;

[0012] The key point determination unit is used to determine the key points of the circuit breaker tripping curve based on the line protection parameters. The key points include the curve start point, the first tripping point, the first intersection point, the second tripping point, the second intersection point, the third tripping point, and the curve end point.

[0013] The curve drawing unit is used to generate a visualized circuit breaker tripping curve based on the key points. The circuit breaker tripping curve includes an L protection curve, an S protection curve, and an I protection curve. The L protection curve starts from the curve starting point, passes through the first tripping point, and ends at the first intersection point. The S protection curve starts from the first intersection point, passes through the second tripping point, and ends at the second intersection point. The I protection curve passes through the second intersection point, passes through the third tripping point, and ends at the curve endpoint.

[0014] Thirdly, the present invention provides a terminal including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the visualization processing method for circuit breaker line protection parameters as described in the first aspect above.

[0015] Fourthly, the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the visualization processing method for circuit breaker line protection parameters as described in the first aspect above.

[0016] This invention provides a method, device, terminal, and storage medium for visualizing circuit breaker line protection parameters. By acquiring the circuit breaker's line protection parameters and determining the key points of the circuit breaker's tripping curve based on these parameters, a visualized circuit breaker tripping curve is generated based on these key points. This invention, by visualizing the line protection parameters, can intuitively display the circuit breaker's tripping characteristics, allowing maintenance personnel to easily understand the circuit breaker's tripping characteristics and identify potential anomalies in the circuit breaker's line protection parameter settings based on the tripping curve. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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.

[0018] Figure 1 This is a schematic diagram illustrating an application scenario of the visualization processing method for circuit breaker line protection parameters provided in this embodiment of the invention.

[0019] Figure 2 This is a flowchart of an implementation of a method for visualizing circuit breaker line protection parameters provided in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of a tripping curve including key points drawn according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of a visualization processing device for circuit breaker line protection parameters provided in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the terminal provided in an embodiment of the present invention. Detailed Implementation

[0023] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0024] To make the objectives, technical solutions, and advantages of the present invention clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0025] Figure 1This is a schematic diagram illustrating an application scenario of a visualization processing method for circuit breaker line protection parameters provided in an embodiment of the present invention. For example... Figure 1 As shown, the power distribution system is communicatively connected to the monitoring terminal. The power distribution system includes multiple circuit breakers, such as... Figure 1 Circuit breaker 1, circuit breaker 2, and circuit breaker n are listed.

[0026] As current power distribution systems demand increasingly higher control precision, for example, when a line fault occurs in a power distribution system, only the protection device (circuit breaker) closest to the fault point or overcurrent point is required to operate to disconnect the line, protecting the safety of personnel and equipment, thereby minimizing the impact on other equipment.

[0027] And in related technologies, especially such as Figure 1 The power distribution system shown, which includes multiple circuit breakers, may experience conflicts in the protection current and protection time settings of the circuit breakers. This could result in the circuit breaker closest to the fault point failing to trigger its protection action, while the upstream circuit breaker of the closest fault point triggers its protection action first, amplifying the impact of the fault point on the power grid. In related technologies, when setting circuit breaker parameters, engineers may only consider the protection requirements of their own circuit, without considering its relationship with upstream or downstream circuits, leading to unreasonable parameter settings. Furthermore, engineers may find it difficult to obtain setting parameters for circuits outside their own circuit, which can also result in unreasonable protection parameter settings for the circuit breakers.

[0028] To detect abnormal parameters, it is necessary to check the protection parameters set for each circuit breaker. Since there may be a large number of circuit breakers, and each circuit breaker may involve three protection stages, there are at least five line protection parameters. It is also necessary to compare the parameters of the upper and lower level circuit breakers. This requires engineers to remember a large number of parameters and compare them. Obviously, this work is tedious and inefficient for on-site engineers.

[0029] This invention provides a solution for detecting anomalies in the line protection parameters of circuit breakers in a power distribution system based on a monitoring terminal. By visualizing the line protection parameters, tripping curves for three protection segments are plotted and displayed on the monitoring terminal's interface, thus intuitively demonstrating the tripping characteristics of the circuit breaker. This allows maintenance personnel to easily understand the tripping characteristics of the circuit breaker based on the tripping curves, and to quickly and accurately identify any possible anomalies in the line protection parameter settings of the circuit breaker.

[0030] See Figure 2 The document illustrates a flowchart of an implementation of a visualization processing method for circuit breaker line protection parameters provided in an embodiment of the present invention, detailed below:

[0031] In step 201, the circuit breaker's line protection parameters are obtained. The line protection parameters include: L protection current, S protection current, S protection time, I protection current, and I protection time.

[0032] In this embodiment of the invention, the circuit breaker can be equipped with three-stage protection. The three-stage protection of the circuit breaker refers to the overload long-delay L-parameter protection, short-circuit short-delay S-parameter protection, and short-circuit instantaneous I-parameter protection performed by the circuit breaker on the power distribution line.

[0033] Among them, the line protection parameters for long-delay overload protection (L-parameter protection) include L-protection current. For long-delay overload protection (L-parameter protection), the circuit breaker's overload protection tripping time t is inversely proportional to the square of the current. When the current equals the rated current of the load, the circuit breaker's tripping time is infinite (i.e., no tripping will occur). The larger the current, the shorter the tripping time. This is the characteristic of the circuit breaker's overload protection (L-parameter protection). The line protection parameters for short-circuit short-delay (S-parameter protection) include S-protection current and S-protection time. Short-circuit short-delay (S-parameter protection) is divided into definite-time and inverse-time types. The line protection parameters for instantaneous short-circuit protection (I-parameter protection) include I-protection current and I-protection time. For instantaneous short-circuit protection (I-parameter protection), once the short-circuit current exceeds the limit, the circuit breaker immediately performs an interruption operation. The time elapsed from the circuit breaker's trip unit detecting the short-circuit current exceeding the limit to the circuit breaker performing the interruption operation is fixed. This type of short-circuit protection is called definite-time (I-parameter protection) characteristic. The limit current, also known as the protection current (I), is the fixed time from when the circuit breaker trip unit detects that the short-circuit current has exceeded the limit until the circuit breaker performs the breaking operation, which is also known as the protection time (I).

[0034] In this embodiment of the invention, the monitoring terminal can obtain the line protection parameters of each circuit breaker in the distribution network in real time, and can also receive the set line protection parameter setting value of the target circuit breaker and send it to the circuit breaker to realize the setting or updating of the line protection parameters of the circuit breaker.

[0035] In step 202, based on the line protection parameters, the key points of the circuit breaker tripping curve are determined. The key points include the curve start point, the first tripping point, the first intersection point, the second tripping point, the second intersection point, the third tripping point, and the curve end point.

[0036] In this embodiment of the invention, key points can be determined based on line protection parameters such as L protection current, S protection current, S protection time, I protection current and I protection time, so as to realize the drawing of the circuit breaker tripping curve.

[0037] It should be noted that the tripping characteristic is a curve showing the tripping time as a function of the line current. This tripping characteristic curve (or time-current characteristic curve) is measured under specified temperature conditions; for example, some standards specify measurement at 30°C, while others specify measurement at 25°C. When the ambient temperature changes, the rated current of the trip unit can be corrected according to the temperature correction factor table provided by the manufacturer.

[0038] Specifically, in one implementation, a coordinate system is constructed with the horizontal axis representing current and the vertical axis representing time. The starting point of the tripping curve can then be (i1, t). max The first tripping point can be... The first intersection point could be The second tripping point can be (i2, t2), the second intersection point can be (i3, t2), the third tripping point can be (i3, t3), and the endpoint of the tripping curve can be (i... max ,t3).

[0039] Where i1 is the L protection current, i2 is the S protection current, t2 is the S protection time, i3 is the I protection current, t3 is the I protection time, k represents the inverse time constant of the circuit breaker, and t max This indicates that when the line current is i1, the protection action time of the circuit breaker is infinite.

[0040] Among them, i max This indicates that when the line current is greater than i3, the circuit breaker will trip within time t3 and perform the protection action.

[0041] In step 203, a visualized circuit breaker tripping curve is generated based on key points. The circuit breaker tripping curve includes an L protection curve, an S protection curve, and an I protection curve. The L protection curve starts from the curve start point, passes through the first tripping point, and ends at the first intersection point. The S protection curve starts from the first intersection point, passes through the second tripping point, and ends at the second intersection point. The I protection curve starts from the second intersection point, passes through the third tripping point, and ends at the curve end point.

[0042] For example, such as Figure 3 The diagram shown is a schematic of a tripping curve including key points drawn according to an embodiment of the present invention. The L protection curve starts from the curve starting point, passes through the first tripping point to the first intersection point, and ends at the first intersection point. The S protection curve starts from the first intersection point, passes through the second tripping point to the second intersection point, and ends at the second intersection point. The I protection curve starts from the second intersection point, passes through the third tripping point to the end point of the curve, and ends at the third intersection point. The L protection curve, the S protection curve, and the I protection curve together constitute the tripping curve of the circuit breaker.

[0043] In one implementation, the L protection curve includes a first vertical line and a first diagonal line, the S protection curve includes a second vertical line and a first horizontal line, and the I protection curve includes a third vertical line and a second horizontal line.

[0044] The first vertical line represents: If =log(i1);

[0045] The first slash represents: log(t) = -2log(i) + log(t1) + 2log(Thm);

[0046] The second vertical line is represented as: I f =log(i2);

[0047] The first horizontal line represents: t = log(t2);

[0048] The third vertical line is represented as: I f =log(i3);

[0049] The second horizontal line represents: t = log(t3);

[0050] Where, k = (Thm) 2 ×t1,Thm indicates that when the current reaches Thm, the circuit breaker will trip within t1 time and perform the protection action.

[0051] In this embodiment of the invention, the inverse time constant k can be understood as follows: Typically, Thm is a multiple of the L protection current. For example, if the L protection time (t1) of a circuit breaker is 10 seconds, the L protection current (i1) is 100A, and the multiple parameter is 3, then Thm is 300A, meaning that when the line current reaches 300A, the circuit breaker will trip after 10 seconds. Correspondingly, if the line current reaches 200A, the circuit breaker will trip after 22.5 seconds.

[0052] In this embodiment of the invention, given the coordinates of key points, the tripping curve of the circuit breaker can be drawn according to the formulas for each line segment.

[0053] In this embodiment of the invention, the tripping curves drawn above intuitively identify each tripping point and can intuitively display the tripping time corresponding to each tripping point, enabling maintenance personnel to intuitively understand the tripping characteristics of the circuit breaker without having to memorize and compare specific protection current, protection time and other numerical parameters.

[0054] As described above, this invention provides a method for visualizing circuit breaker line protection parameters. By acquiring the circuit breaker's line protection parameters and determining the key points of the circuit breaker's tripping curve based on these parameters, a visualized circuit breaker tripping curve is generated based on these key points. This invention, by visualizing the line protection parameters, can intuitively display the circuit breaker's tripping characteristics, allowing maintenance personnel to easily understand the circuit breaker's tripping characteristics and identify potential anomalies in the circuit breaker's line protection parameter settings based on the tripping curve.

[0055] In one implementation, after generating the visualized circuit breaker tripping curve, the visualization processing method for the circuit breaker line protection parameters may further include: if the L protection curve is above the S protection curve and the S protection curve is above the I protection curve, then the circuit breaker line protection parameter settings are determined to be normal; if the L protection curve is not above the S protection curve, or the S protection curve is not above the I protection curve, then the circuit breaker line protection parameter settings are determined to be abnormal.

[0056] In this embodiment of the invention, the tripping times corresponding to the three protection segments are different. Therefore, the L protection curve, S protection curve, and I protection curve have a certain positional relationship. For example, the L protection curve is above the S protection curve, and the S protection curve is above the I protection curve. Based on these positional relationships, it can be determined whether the line protection parameter settings of a single circuit breaker are abnormal.

[0057] In one implementation, the visualization processing method for circuit breaker line protection parameters may further include: displaying a first tripping curve corresponding to the upstream circuit breaker and a second tripping curve corresponding to the downstream circuit breaker on the visualization interface.

[0058] In this embodiment of the invention, the tripping curves of two circuit breakers with hierarchical relationships can be displayed on the visualization interface of the monitoring terminal. By comparing the positional relationship of the two tripping curves, it is possible to intuitively determine whether the line protection parameter settings of the two circuit breakers are reasonable. This ensures that when a line short circuit occurs, the circuit breaker closest to the short circuit point (i.e., when a short circuit fault occurs in a lower-level line, the corresponding circuit breaker of the lower-level line will trip first, without affecting the upper-level line) will trip first, thus preventing the impact of the short circuit accident from escalating.

[0059] In one implementation, the visualization processing method for circuit breaker line protection parameters may further include: if there is an overlap between the first tripping curve and the second tripping curve, then outputting an abnormal setting prompt for the circuit breaker line protection parameters.

[0060] In this embodiment of the invention, the monitoring terminal can determine whether two tripping curves with hierarchical relationship meet the preset parameter setting rules according to preset rules. If they meet the preset rules, the line protection parameters of the two circuit breakers are considered to be set normally. If they do not meet the preset parameter setting rules, the line protection parameters of the two circuit breakers are considered to be set abnormally, and the monitoring terminal can issue an abnormal prompt. The preset parameter setting rules can be that the two tripping curves do not have overlapping points.

[0061] In one implementation, the visualization processing method for circuit breaker line protection parameters may further include: if the overlapping point is not located on the second horizontal line, then it is determined that the line protection parameter settings of the upstream circuit breaker and the downstream circuit breaker are abnormal; if the overlapping point is located on the second horizontal line, then the expected short-circuit current is obtained; if the expected short-circuit current is greater than I protection current, then it is determined that the line protection parameter settings of the upstream circuit breaker and the downstream circuit breaker are abnormal.

[0062] In this embodiment of the invention, if the second horizontal line (i.e. the horizontal line portion of the I protection curve) occurs at the overlap point of the two tripping curves, the expected short-circuit current and the I protection current can be compared. If the expected short-circuit current is greater than the I protection current, it is considered that the line protection parameters of the upper-level circuit breaker and the lower-level circuit breaker are set abnormally. If the expected short-circuit current is not greater than the I protection current, it is considered that the line protection parameters of the upper-level circuit breaker and the lower-level circuit breaker are set normally.

[0063] In one implementation, if the line protection parameters of the upstream and downstream circuit breakers are set abnormally, the visualization processing method for the circuit breaker line protection parameters may further include: obtaining the actual load of the downstream circuit breaker; if the actual load of the downstream circuit breaker does not match its line protection parameters, adjusting the line protection parameters of the downstream circuit breaker so that the second tripping curve does not overlap with the first tripping curve; if the actual load of the downstream circuit breaker matches its line protection parameters, adjusting the line protection parameters of the upstream circuit breaker so that the first tripping curve does not overlap with the second tripping curve.

[0064] In this embodiment of the invention, when abnormal line protection parameter settings of the upstream and downstream circuit breakers are detected, the line protection parameters can be updated and corrected based on the actual load of the downstream circuit breaker. Priority is given to ensuring that the actual load of the downstream circuit breaker matches its line protection parameters, thereby ensuring the normal operation of the downstream power distribution system corresponding to the downstream circuit breaker. However, there may be other downstream circuit breakers cascaded under the upstream circuit breaker, and the update of the line protection parameters of the upstream circuit breaker needs to take into account all downstream circuit breakers cascaded under the upstream circuit breaker.

[0065] In one implementation, the visualization processing method for circuit breaker line protection parameters may further include: displaying trip curves corresponding to multiple circuit breakers on a display interface, wherein the multiple circuit breakers have a hierarchical relationship; if the displayed trip curves have overlapping points, then based on the principle of minimizing the number of adjustments, prompting the trip curves whose parameters need to be adjusted so that the adjusted trip curves do not have overlapping points.

[0066] In this embodiment of the invention, when there are a certain number of circuit breakers in the power distribution system, and these circuit breakers are cascaded, a comparison of their tripping curves reveals that the line protection parameters of multiple circuit breakers need adjustment. An optimization algorithm can be used to determine the circuit breakers requiring line protection parameter updates based on the principle of minimizing the number of adjustments, while ensuring that the tripping curves of the upper and lower level circuit breakers do not overlap. This achieves faster circuit breaker protection parameter setting. For example, the system can provide multiple adjustment schemes, and based on the number of circuit breakers to be adjusted in each scheme, select the scheme with the fewest circuit breakers as the target scheme. The circuit breaker line protection parameters are then updated and adjusted based on the target scheme, completing the circuit breaker parameter setting.

[0067] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0068] The following are device embodiments of the present invention. For details not described in detail, please refer to the corresponding method embodiments described above.

[0069] Figure 4 A schematic diagram of the visualization processing device for circuit breaker line protection parameters provided in an embodiment of the present invention is shown. For ease of explanation, only the parts related to the embodiment of the present invention are shown, and are described in detail below:

[0070] like Figure 4 As shown, the visualization processing device 4 for circuit breaker line protection parameters includes: a parameter acquisition unit 41, a key point determination unit 42, and a curve drawing unit 43.

[0071] The parameter acquisition unit 41 is used to acquire the line protection parameters of the circuit breaker, including: L protection current, S protection current, S protection time, I protection current and I protection time;

[0072] The key point determination unit 42 is used to determine the key points of the circuit breaker tripping curve based on the line protection parameters. The key points include the curve start point, the first tripping point, the first intersection point, the second tripping point, the second intersection point, the third tripping point, and the curve end point.

[0073] The curve drawing unit 43 is used to generate a visualized circuit breaker tripping curve based on the key points. The circuit breaker tripping curve includes an L protection curve, an S protection curve, and an I protection curve. The L protection curve starts from the curve starting point, passes through the first tripping point, and ends at the first intersection point. The S protection curve starts from the first intersection point, passes through the second tripping point, and ends at the second intersection point. The I protection curve passes through the second intersection point, passes through the third tripping point, and ends at the curve endpoint.

[0074] In one possible implementation, the key point determination unit 42 is specifically used to construct a coordinate system with the horizontal axis representing current and the vertical axis representing time, wherein the starting point of the curve includes (i1, t). max The first tripping point includes... The first intersection includes The second tripping point includes (i2, t2), the second intersection point includes (i3, t2), the third tripping point includes (i3, t3), and the curve endpoint includes (i... max ,t3);

[0075] Where i1 is the L protection current, i2 is the S protection current, t2 is the S protection time, i3 is the I protection current, t3 is the I protection time, k represents the inverse time constant of the circuit breaker, and t max This indicates that when the line current is i1, the protection action time of the circuit breaker is infinite.

[0076] Among them, i max This indicates that when the line current is greater than i3, the circuit breaker will trip within time t3 to perform the protection action. In one possible implementation, the L protection curve includes a first vertical line and a first diagonal line, the S protection curve includes a second vertical line and a first horizontal line, and the I protection curve includes a third vertical line and a second horizontal line.

[0077] The first vertical line is represented as: I f =log(i1);

[0078] The first slash is represented as: log(t) = -2log(i) + log(t1) + 2log(Thm);

[0079] The second vertical line is represented as: I f =log(i2);

[0080] The first horizontal line represents: t = log(t2);

[0081] The third vertical line is represented as: I f =log(i3);

[0082] The second horizontal line represents: t = log(t3);

[0083] Where, k = (Thm) 2 ×t1,Thm indicates that when the current reaches Thm, the circuit breaker will trip within t1 time and perform the protection action.

[0084] In one possible implementation, the visualization processing device for circuit breaker line protection parameters may further include a first parameter anomaly judgment unit, which determines that the circuit breaker line protection parameter settings are normal if, after generating the visualized circuit breaker tripping curve, the L protection curve is above the S protection curve and the S protection curve is above the I protection curve.

[0085] If the L protection curve is not above the S protection curve, or if the S protection curve is not above the I protection curve, then the circuit breaker line protection parameter settings are abnormal.

[0086] In one possible implementation, the curve plotting unit 43 can also be used to display, on the visualization interface, a first tripping curve corresponding to the upstream circuit breaker and a second tripping curve corresponding to the downstream circuit breaker.

[0087] In one possible implementation, the visualization processing device for circuit breaker line protection parameters may further include a second parameter anomaly judgment unit, which is used to output an abnormal circuit breaker line protection parameter setting prompt if there is an overlap between the first tripping curve and the second tripping curve.

[0088] In one possible implementation, the second parameter anomaly judgment unit is specifically used to determine that the line protection parameter settings of the upper-level circuit breaker and the lower-level circuit breaker are abnormal if the overlapping point is not located on the second horizontal line.

[0089] If the overlap point is located on the second horizontal line, the expected short-circuit current is obtained;

[0090] If the expected short-circuit current is greater than the I protection current, then it is determined that the line protection parameter settings of the upstream and downstream circuit breakers are abnormal.

[0091] In one possible implementation, the visualization processing device for circuit breaker line protection parameters may further include a parameter correction unit for obtaining the actual load on the downstream circuit breaker.

[0092] If the actual load of the downstream circuit breaker does not match its line protection parameters, the line protection parameters of the downstream circuit breaker shall be adjusted so that the second tripping curve and the first tripping curve do not overlap.

[0093] If the actual load of the downstream circuit breaker matches its line protection parameters, then adjust the line protection parameters of the upstream circuit breaker so that the first tripping curve and the second tripping curve do not overlap.

[0094] In one possible implementation, the parameter correction unit can also be used to display the tripping curves of multiple circuit breakers on the display interface, wherein the multiple circuit breakers have a hierarchical cascade relationship.

[0095] If the displayed tripping curves have overlapping points;

[0096] Based on the principle of minimizing the number of adjustments, the system will prompt you to adjust the tripping curves of the parameters that need to be adjusted so that the adjusted tripping curves do not have any overlapping points.

[0097] This invention provides a visualization processing device for circuit breaker line protection parameters. It acquires the circuit breaker's line protection parameters, determines key points on the circuit breaker's tripping curve based on these parameters, and then generates a visualized circuit breaker tripping curve based on these key points. By visualizing the line protection parameters, this invention can intuitively display the circuit breaker's tripping characteristics, allowing maintenance personnel to easily understand the circuit breaker's tripping characteristics and identify potential anomalies in the circuit breaker's line protection parameter settings based on the tripping curve.

[0098] Figure 5 This is a schematic diagram of a terminal provided in an embodiment of the present invention. Figure 5 As shown, the terminal 5 in this embodiment includes: a processor 50, a memory 51, and a computer program 52 stored in the memory 51 and executable on the processor 50. When the processor 50 executes the computer program 52, it implements the steps in the above-described embodiments of the visualization processing method for circuit breaker line protection parameters, for example... Figure 2 Steps 201 to 203 are shown. Alternatively, when the processor 50 executes the computer program 52, it implements the functions of each unit in the above-described device embodiments, for example... Figure 4 The functions of units 41 to 43 are shown.

[0099] For example, the computer program 52 can be divided into one or more units, which are stored in the memory 51 and executed by the processor 50 to complete the present invention. The one or more units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program 52 in the terminal 5. For example, the computer program 52 can be divided into... Figure 4 Units 41 to 43 are shown.

[0100] The terminal 5 can be a computing device such as a desktop computer, laptop, handheld computer, or cloud server. The terminal 5 may include, but is not limited to, a processor 50 and a memory 51. Those skilled in the art will understand that... Figure 5This is merely an example of terminal 5 and does not constitute a limitation on terminal 5. It may include more or fewer components than shown, or combine certain components, or different components. For example, the terminal may also include input / output devices, network access devices, buses, etc.

[0101] The processor 50 may be a central processing unit (CPU), a programmable logic controller (PLC), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0102] The memory 51 can be an internal storage unit of the terminal 5, such as a hard disk or memory of the terminal 5. The memory 51 can also be an external storage device of the terminal 5, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the terminal 5. Furthermore, the memory 51 can include both internal storage units and external storage devices of the terminal 5. The memory 51 is used to store the computer program and other programs and data required by the terminal. The memory 51 can also be used to temporarily store data that has been output or will be output.

[0103] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments 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. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0104] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0105] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0106] In the embodiments provided by this invention, it should be understood that the disclosed devices / terminals and methods can be implemented in other ways. For example, the device / terminal embodiments described above are merely illustrative. For instance, the division of modules or 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; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0107] 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.

[0108] 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.

[0109] If the integrated module / 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, all or part of the processes in the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the above embodiments of the visualization processing method for circuit breaker line protection parameters. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drive, portable hard drive, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content contained in the computer-readable medium may be appropriately added to or subtracted from the content as required by the legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium may not include electrical carrier signals and telecommunication signals.

[0110] The above-described 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, and should all be included within the protection scope of the present invention.

Claims

1. A method for visualizing circuit breaker line protection parameters, characterized in that, include: Obtain the line protection parameters of the circuit breaker, including: L protection current, S protection current, S protection time, I protection current and I protection time; Based on the line protection parameters, the key points of the circuit breaker tripping curve are determined, including the curve start point, the first tripping point, the first intersection point, the second tripping point, the second intersection point, the third tripping point, and the curve end point. A visualized circuit breaker tripping curve is generated based on the key points. The circuit breaker tripping curve includes an L protection curve, an S protection curve, and an I protection curve. The L protection curve starts from the curve starting point, passes through the first tripping point, and ends at the first intersection point. The S protection curve starts from the first intersection point, passes through the second tripping point, and ends at the second intersection point. The I protection curve starts from the second intersection point, passes through the third tripping point, and ends at the curve ending point. A coordinate system is constructed with the horizontal axis representing current and the vertical axis representing time. The starting point of the curve includes... The first tripping point includes The first intersection point includes The second tripping point includes The second intersection point includes The third tripping point includes The endpoint of the curve includes ; in, For L protection current, For S protection current, For S protection time, For I protection current, For I protection time, This represents the inverse time constant of the circuit breaker. Indicates the line current is At that time, the protection action time of the circuit breaker is infinite; in, This indicates that the line current is greater than At that time, the circuit breaker will... Internal tripping triggers a protective action; The L protection curve includes a first vertical line and a first diagonal line; the S protection curve includes a second vertical line and a first horizontal line; and the I protection curve includes a third vertical line and a second horizontal line. The first vertical line is represented as: ; The first diagonal line is represented as: ; The second vertical line is represented as: ; The first horizontal line represents: ; The third vertical line is represented as follows: ; The second horizontal line represents: ; in, , Indicates that the current reaches The circuit breaker will The tripping mechanism disengages within a specified time, triggering a protective action.

2. The visualization processing method for circuit breaker line protection parameters as described in claim 1, characterized in that, After generating a visualized circuit breaker tripping curve, the method further includes: If the L protection curve is above the S protection curve, and the S protection curve is above the I protection curve, then the circuit breaker line protection parameters are set normally. If the L protection curve is not above the S protection curve, or if the S protection curve is not above the I protection curve, then the circuit breaker line protection parameter settings are abnormal.

3. The visualization processing method for circuit breaker line protection parameters as described in claim 1, characterized in that, The method further includes: The visualization interface displays the first tripping curve corresponding to the upstream circuit breaker, and the second tripping curve corresponding to the downstream circuit breaker.

4. The visualization processing method for circuit breaker line protection parameters as described in claim 3, characterized in that, The method further includes: If the first tripping curve and the second tripping curve overlap, an abnormal circuit breaker line protection parameter setting prompt will be displayed.

5. The visualization processing method for circuit breaker line protection parameters as described in claim 4, characterized in that, The method further includes: If the overlapping point is not located on the second horizontal line, it is determined that the line protection parameter settings of the upper-level circuit breaker and the lower-level circuit breaker are abnormal. If the overlap point is located on the second horizontal line, the expected short-circuit current is obtained; If the expected short-circuit current is greater than the I protection current, then it is determined that the line protection parameter settings of the upstream and downstream circuit breakers are abnormal.

6. The visualization processing method for circuit breaker line protection parameters as described in claim 5, characterized in that, If the line protection parameters of the upstream and downstream circuit breakers are set abnormally, the method further includes: Obtain the actual load on the downstream circuit breaker; If the actual load of the downstream circuit breaker does not match its line protection parameters, the line protection parameters of the downstream circuit breaker shall be adjusted so that the second tripping curve and the first tripping curve do not overlap. If the actual load of the downstream circuit breaker matches its line protection parameters, then adjust the line protection parameters of the upstream circuit breaker so that the first tripping curve and the second tripping curve do not overlap.

7. The visualization processing method for circuit breaker line protection parameters as described in claim 4, characterized in that, The method further includes: The display interface shows the tripping curves of multiple circuit breakers, wherein the multiple circuit breakers have a cascaded relationship. If the displayed tripping curves have overlapping points; Based on the principle of minimizing the number of adjustments, the system will prompt you to adjust the tripping curves of the parameters that need to be adjusted so that the adjusted tripping curves do not have any overlapping points.

8. A visualization processing device for circuit breaker line protection parameters, characterized in that, include: The parameter acquisition unit is used to acquire the line protection parameters of the circuit breaker, which include: L protection current, S protection current, S protection time, I protection current and I protection time; The key point determination unit is used to determine the key points of the circuit breaker tripping curve based on the line protection parameters. The key points include the curve start point, the first tripping point, the first intersection point, the second tripping point, the second intersection point, the third tripping point, and the curve end point. The curve drawing unit is used to generate a visualized circuit breaker tripping curve based on the key points. The circuit breaker tripping curve includes an L protection curve, an S protection curve, and an I protection curve. The L protection curve starts from the curve starting point, passes through the first tripping point, and ends at the first intersection point. The S protection curve starts from the first intersection point, passes through the second tripping point, and ends at the second intersection point. The I protection curve starts from the second intersection point, passes through the third tripping point, and ends at the curve ending point. A coordinate system is constructed with the horizontal axis representing current and the vertical axis representing time. The starting point of the curve includes... The first tripping point includes The first intersection point includes The second tripping point includes The second intersection point includes The third tripping point includes The endpoint of the curve includes ; in, For L protection current, For S protection current, For S protection time, For I protection current, For I protection time, This represents the inverse time constant of the circuit breaker. Indicates the line current is At that time, the protection action time of the circuit breaker is infinite; in, This indicates that the line current is greater than At that time, the circuit breaker will... Internal tripping triggers a protective action; The L protection curve includes a first vertical line and a first diagonal line; the S protection curve includes a second vertical line and a first horizontal line; and the I protection curve includes a third vertical line and a second horizontal line. The first vertical line is represented as: ; The first diagonal line is represented as: ; The second vertical line is represented as: ; The first horizontal line represents: ; The third vertical line is represented as follows: ; The second horizontal line represents: ; in, , Indicates that the current reaches The circuit breaker will The tripping mechanism disengages within a specified time, triggering the protective action.

9. A terminal, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the visualization processing method for circuit breaker line protection parameters as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the visualization processing method for circuit breaker line protection parameters as described in any one of claims 1 to 7.

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