Fault detection method and device for disconnecting switch and electronic equipment
By obtaining the current-time relationship diagram of the disconnecting switch, determining the feature combination and comparing it with the preset feature value, the problems of low accuracy and low efficiency in disconnecting switch fault detection in the prior art are solved, and rapid and accurate fault type identification and timely alarm are realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUIZHOU POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CO LTD
- Filing Date
- 2026-01-09
- Publication Date
- 2026-05-12
AI Technical Summary
Existing fault detection methods for disconnecting switches are computationally complex, resulting in low detection accuracy and low efficiency, making it difficult to meet the needs of electrical systems for rapid fault detection.
By acquiring the current-time relationship diagram of the disconnecting switch when the state changes, characteristic combinations are determined, including the changes in current at different times and the time difference. The fault type is determined by comparing preset characteristic values, which simplifies the signal processing process.
It enables rapid and accurate detection of fault types in disconnect switches, improving detection efficiency and accuracy, and ensuring the operational stability and safety of electrical systems.
Smart Images
Figure CN122017545A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of disconnector switch technology, and in particular to a fault detection method, device, and electronic device for disconnectors. Background Technology
[0002] A disconnecting switch is an electrical device primarily used to isolate and disconnect circuits in an electrical system. When a disconnecting switch malfunctions, especially due to mechanical failures such as jamming, it can severely impact the operation of the electrical system.
[0003] In existing technologies, the current signal of the disconnector switch within a preset time period is acquired, and then filtered, Hilbert-transformed, and processed for amplitude and standard deviation extraction to obtain a standard deviation sequence of the current signal. The fault type of the disconnector switch is then determined by comparing the standard deviation sequence with a preset threshold. However, this method is computationally complex, resulting in low fault detection accuracy and inefficiency.
[0004] Therefore, there is an urgent need for a method that can accurately and efficiently detect the fault types of disconnect switches. Summary of the Invention
[0005] This application provides a fault detection method, apparatus, and electronic device for disconnecting switches, which can achieve the effect of accurately and efficiently detecting the fault types of disconnecting switches.
[0006] In a first aspect, embodiments of this application provide a fault detection method for a disconnecting switch, comprising:
[0007] Obtain the current-time relationship diagram when the disconnecting switch undergoes a state change; wherein, the state change is either opening or closing, and the current-time relationship diagram characterizes the change of current in the disconnecting switch when the disconnecting switch undergoes a state change;
[0008] Based on the current-time relationship diagram, the characteristic combination of the disconnecting switch is determined; wherein, the characteristic value in the characteristic combination represents one or more of the following: the overall current change of the disconnecting switch when the disconnecting switch undergoes a state change, the current change of the disconnecting switch during the steady period, and the time difference corresponding to different current change periods in the current-time relationship diagram.
[0009] The fault type of the disconnecting switch is determined based on the feature values in the feature combination and the preset feature values; wherein, the preset feature values are feature values obtained when the state of the disconnecting switch changes during normal operation.
[0010] In one possible implementation, determining the characteristic combination of the disconnecting switch based on the current-time relationship diagram includes:
[0011] Based on the current-time relationship diagram, a set of time points is determined; wherein, the set of time points includes one or more of the following: a first time point, a second time point, a third time point, and a fourth time point; the first time point represents the starting time of the current in the current-time relationship diagram; the second time point represents the time corresponding to the first occurrence of a current peak in the current-time relationship diagram; the third time point represents the time corresponding to the last occurrence of a current peak in the current-time relationship diagram; and the fourth time point represents the time corresponding to the current disappearing in the current-time relationship diagram.
[0012] The characteristic combination of the disconnecting switch is determined based on the variation of the current of the disconnecting switch between different times in the time set, and / or based on the time difference corresponding to different current change periods in the current-time relationship diagram.
[0013] In one possible implementation, the feature combination includes a first feature value, a second feature value, a third feature value, a fourth feature value, and a fifth feature value;
[0014] Wherein, the first characteristic value is the integral value of the current of the disconnecting switch from the first time to the fourth time; the second characteristic value is the average value of the current of the disconnecting switch from the second time to the fourth time; the third characteristic value is the time difference between the second time and the third time; the fourth characteristic value is the time difference between the first time and the second time; and the fifth characteristic value is the time difference between the third time and the fourth time.
[0015] In one possible implementation, the fault type of the disconnecting switch is determined based on the feature values in the feature combination and preset feature values, including:
[0016] For each feature value in the feature combination, a parameter value corresponding to the feature value is determined based on the feature value and the preset feature value corresponding to the feature value; wherein, the parameter value represents the fault condition of the disconnecting switch;
[0017] The fault type of the disconnecting switch is determined based on at least two parameter values.
[0018] In one possible implementation, the parameter value corresponding to the i-th feature value is ;
[0019] in, For the i-th eigenvalue, Let i be the preset feature value corresponding to the i-th feature value, where i is a positive integer greater than or equal to 1.
[0020] In one possible implementation, the fault type of the disconnecting switch is determined based on at least two parameter values, including:
[0021] If the parameter value corresponding to the first feature value is less than the first preset threshold, and the parameter value corresponding to the fourth feature value is less than the second preset threshold and greater than the third preset threshold, then the fault type of the disconnecting switch is determined to be a slight jamming fault type.
[0022] If the parameter value corresponding to the first feature value is greater than the first preset threshold, and the parameter value corresponding to the second feature value is less than the fourth preset threshold, and the parameter value corresponding to the third feature value is less than the fifth preset threshold, then the fault type of the disconnecting switch is determined to be a moderate jamming fault type.
[0023] In one possible implementation, the fault type of the disconnecting switch is determined based on at least two parameter values, including:
[0024] If the parameter value corresponding to the first feature value is greater than the first preset threshold, and the parameter value corresponding to the second feature value is less than the fourth preset threshold, and the parameter value corresponding to the third feature value is greater than the fifth preset threshold, and the parameter value corresponding to the fourth feature value is greater than the sixth preset threshold, then the fault type of the disconnecting switch is determined to be a severe jamming fault type.
[0025] If the parameter value corresponding to the first feature value is greater than the first preset threshold, and the parameter value corresponding to the second feature value is less than the fourth preset threshold, and the parameter value corresponding to the third feature value is greater than the fifth preset threshold, and the parameter value corresponding to the fourth feature value is less than the sixth preset threshold, and the parameter value corresponding to the fifth feature value is greater than the sixth preset threshold, then the fault type of the disconnecting switch is determined to be the limit device fault type.
[0026] In one possible implementation, the method further includes:
[0027] Based on the fault type, an alarm message is generated and issued; wherein the alarm message indicates the fault type.
[0028] Secondly, embodiments of this application provide a fault detection device for a disconnecting switch, comprising:
[0029] The acquisition module is used to acquire the current-time relationship diagram when the disconnecting switch undergoes a state change; wherein the state change is opening or closing, and the current-time relationship diagram characterizes the change of current in the disconnecting switch when the disconnecting switch undergoes a state change;
[0030] The first determining module is used to determine the characteristic combination of the disconnecting switch according to the current-time relationship diagram; wherein, the characteristic value in the characteristic combination represents one or more of the following: the overall current change of the disconnecting switch when the disconnecting switch undergoes a state change, the current change of the disconnecting switch during the steady period, and the time difference corresponding to different current change periods in the current-time relationship diagram.
[0031] The second confirmation module is used to determine the fault type of the disconnecting switch based on the feature values in the feature combination and the preset feature values; wherein the preset feature values are feature values obtained when the disconnecting switch undergoes a state change based on normal operation.
[0032] In one possible implementation, the first determining module includes:
[0033] Based on the current-time relationship diagram, a set of time points is determined; wherein, the set of time points includes one or more of the following: a first time point, a second time point, a third time point, and a fourth time point; the first time point represents the starting time of the current in the current-time relationship diagram; the second time point represents the time corresponding to the first occurrence of a current peak in the current-time relationship diagram; the third time point represents the time corresponding to the last occurrence of a current peak in the current-time relationship diagram; and the fourth time point represents the time corresponding to the current disappearing in the current-time relationship diagram.
[0034] The characteristic combination of the disconnecting switch is determined based on the variation of the current of the disconnecting switch between different times in the time set, and / or based on the time difference corresponding to different current change periods in the current-time relationship diagram.
[0035] In one possible implementation, the feature combination includes a first feature value, a second feature value, a third feature value, a fourth feature value, and a fifth feature value;
[0036] Wherein, the first characteristic value is the integral value of the current of the disconnecting switch from the first time to the fourth time; the second characteristic value is the average value of the current of the disconnecting switch from the second time to the fourth time; the third characteristic value is the time difference between the second time and the third time; the fourth characteristic value is the time difference between the first time and the second time; and the fifth characteristic value is the time difference between the third time and the fourth time.
[0037] In one possible implementation, the second confirmation module includes:
[0038] For each feature value in the feature combination, a parameter value corresponding to the feature value is determined based on the feature value and the preset feature value corresponding to the feature value; wherein, the parameter value represents the fault condition of the disconnecting switch;
[0039] The fault type of the disconnecting switch is determined based on at least two parameter values.
[0040] In one possible implementation, the parameter value corresponding to the i-th feature value is ;
[0041] in, For the i-th eigenvalue, Let i be the preset feature value corresponding to the i-th feature value, where i is a positive integer greater than or equal to 1.
[0042] In one possible implementation, the fault type of the disconnecting switch is determined based on at least two parameter values, including:
[0043] If the parameter value corresponding to the first feature value is less than the first preset threshold, and the parameter value corresponding to the fourth feature value is less than the second preset threshold and greater than the third preset threshold, then the fault type of the disconnecting switch is determined to be a slight jamming fault type.
[0044] If the parameter value corresponding to the first feature value is greater than the first preset threshold, and the parameter value corresponding to the second feature value is less than the fourth preset threshold, and the parameter value corresponding to the third feature value is less than the fifth preset threshold, then the fault type of the disconnecting switch is determined to be a moderate jamming fault type.
[0045] In one possible implementation, the fault type of the disconnecting switch is determined based on at least two parameter values, including:
[0046] If the parameter value corresponding to the first feature value is greater than the first preset threshold, and the parameter value corresponding to the second feature value is less than the fourth preset threshold, and the parameter value corresponding to the third feature value is greater than the fifth preset threshold, and the parameter value corresponding to the fourth feature value is greater than the sixth preset threshold, then the fault type of the disconnecting switch is determined to be a severe jamming fault type.
[0047] If the parameter value corresponding to the first feature value is greater than the first preset threshold, and the parameter value corresponding to the second feature value is less than the fourth preset threshold, and the parameter value corresponding to the third feature value is greater than the fifth preset threshold, and the parameter value corresponding to the fourth feature value is less than the sixth preset threshold, and the parameter value corresponding to the fifth feature value is greater than the sixth preset threshold, then the fault type of the disconnecting switch is determined to be a limit device fault type.
[0048] In one possible implementation, the device further includes:
[0049] An alarm module is used to generate and issue alarm information based on the fault type; wherein the alarm information indicates the fault type.
[0050] Thirdly, embodiments of this application provide an electronic device, including: a memory and a processor;
[0051] The memory stores computer-executed instructions;
[0052] The processor executes computer execution instructions stored in the memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.
[0053] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementations of the first aspect.
[0054] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect.
[0055] This application provides a fault detection method, apparatus, and electronic device for a disconnecting switch. It acquires a current-time relationship diagram when the disconnecting switch undergoes a state change (opening or closing). This diagram clearly characterizes the current changes during the state change. Subsequently, a feature combination of the disconnecting switch is determined based on the current-time relationship diagram. The feature values in this combination encompass various information, including the overall current change during the state change, the current change during the steady-state period, and the time difference corresponding to different current change periods. These feature values reflect the electrical characteristics of the disconnecting switch during the state change process from different perspectives. Finally, the feature values in the feature combination are compared with preset feature values obtained when the disconnecting switch undergoes a state change under normal operation. The fault type of the disconnecting switch is determined based on the comparison results. This method avoids the complex signal processing of existing technologies, simplifies the calculation steps, and improves the efficiency and accuracy of fault detection. It effectively solves the problems of low accuracy and low efficiency in fault detection in existing technologies, achieving the beneficial effect of rapid and accurate detection of disconnecting switch fault types. Attached Figure Description
[0056] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0057] Figure 1 A flowchart illustrating a fault detection method for a disconnecting switch provided in this application embodiment. Figure 1 ;
[0058] Figure 2 A schematic diagram of a current-time relationship provided in an embodiment of this application;
[0059] Figure 3 A flowchart illustrating a fault detection method for a disconnecting switch provided in this application embodiment. Figure 2 ;
[0060] Figure 4 A schematic diagram of the structure of a fault detection device for a disconnecting switch provided in this application embodiment. Figure 1 ;
[0061] Figure 5 A schematic diagram of the structure of a fault detection device for a disconnecting switch provided in this application embodiment. Figure 2 ;
[0062] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.
[0063] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation
[0064] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0065] Disconnect switches, as key equipment in electrical systems, primarily function to isolate and disconnect circuits. For example, during power system maintenance, disconnect switches reliably isolate equipment requiring repair from live parts, ensuring the safety of maintenance personnel. When adjusting system operation modes, disconnect switches can change the circuit connection method, enabling switching between different lines. However, when disconnect switches malfunction, especially mechanical faults such as jamming, it can have numerous adverse effects on the operation of the electrical system. Jamming may prevent the disconnect switch from opening and closing normally, causing the circuit to fail to isolate or conduct as expected, potentially leading to serious consequences such as system short circuits, equipment damage, and even personal injury or death.
[0066] In existing technologies, common fault detection methods involve acquiring the current signal of the disconnector switch within a preset time period, and then sequentially filtering, performing Hilbert transform, and extracting amplitude and standard deviation to obtain a standard deviation sequence of the current signal. The fault type of the disconnector switch is then determined by comparing the standard deviation sequence with a preset threshold. While this method can detect faults, its complex computational process, involving multiple signal processing steps, results in low accuracy and efficiency. Especially in practical applications, the complex computational process increases system response time, reduces the real-time performance of fault detection, and fails to meet the requirements of electrical systems for rapid fault detection.
[0067] Therefore, the fault detection method, device, and electronic equipment for disconnecting switches provided in this application can solve the above-mentioned problems.
[0068] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.
[0069] Figure 1 A flowchart illustrating a fault detection method for a disconnecting switch provided in this application embodiment. Figure 1 ,like Figure 1 As shown, the method includes:
[0070] S101. Obtain the current-time relationship diagram when the disconnecting switch undergoes a state change; wherein, the state change is either opening or closing, and the current-time relationship diagram characterizes the change of the current of the disconnecting switch when the disconnecting switch undergoes a state change.
[0071] For example, a disconnecting switch is a switching device mainly used for "isolating power supply, switching operations, and connecting and disconnecting small current circuits" without arc extinguishing function. It does not have a dedicated arc extinguishing device and cannot be used to interrupt load current and short-circuit current. Usually, during circuit maintenance, the disconnecting switch is opened to create a clear disconnect point between the equipment under maintenance and the live parts to ensure the safety of maintenance personnel.
[0072] Closing refers to the process of changing the state of electrical equipment such as disconnecting switches from open to closed. When a closing operation is performed, the contacts of the disconnecting switch gradually come together, making the circuit conductive and allowing current to flow.
[0073] Opening a circuit breaker refers to the process of changing an electrical device, such as a disconnector switch, from a closed state to an open state. During opening, the contacts of the disconnector switch gradually separate, cutting off the circuit and stopping the flow of current.
[0074] Obtain the current-time relationship diagram when the disconnecting switch is closed or opened. Connect a current sensor (such as a Hall current sensor, electromagnetic current transformer, etc.) to the circuit of the disconnecting switch and collect the changes in the electrical signal when the disconnecting switch is closed or opened.
[0075] Optionally, the acquired raw telecommunications signals can be preprocessed to eliminate noise and interference.
[0076] Optionally, time data can be used as the x-axis and current data as the y-axis to plot a current-time relationship graph.
[0077] S102. Based on the current-time relationship diagram, determine the characteristic combination of the disconnecting switch; wherein, the characteristic value in the characteristic combination represents one or more of the following: the overall current change of the disconnecting switch when the disconnecting switch undergoes a state change, the current change of the disconnecting switch during the steady period, and the time difference corresponding to different current change periods in the current-time relationship diagram.
[0078] For example, the characteristic combination of the disconnecting switch is determined according to the current-time relationship diagram; wherein, the characteristic value in the characteristic combination represents one or more of the following: the overall current change of the disconnecting switch when the disconnecting switch undergoes a state change, the current change of the disconnecting switch during the steady period, and the time difference corresponding to different current change periods in the current-time relationship diagram.
[0079] Figure 2 This is a schematic diagram of a current-time relationship provided in an embodiment of this application; as shown... Figure 2 As shown in the figure, time data is used as the horizontal axis and current data is used as the vertical axis in the current-time relationship graph; the starting time of the current is t0, the time of the first current peak is t1, the time corresponding to the last current peak is t2, and the time corresponding to the current disappearance is t3.
[0080] The overall current change of the disconnecting switch when the disconnecting switch is closed or opened refers to the integration of the current from time t0 to t3 to obtain the first characteristic value; the first characteristic value indicates the amount of energy consumed when the disconnecting switch is closed or opened.
[0081] The current variation of the disconnecting switch during the steady period refers to the average value of the current from time t1 to t2, which is used to obtain the second characteristic value. The second characteristic value indicates whether the disconnecting switch is stuck or running dry during the opening or closing process.
[0082] The time difference corresponding to different current change periods in the current-time relationship graph includes the third characteristic value, the fourth characteristic value, and the fifth characteristic value.
[0083] The third characteristic value is the time difference between time t1 and time t2; the third characteristic value indicates the time consumption of the disconnecting switch during the opening or closing process, and can reflect whether there is jamming or obstruction of movement during the opening or closing process of the disconnecting switch.
[0084] The fourth characteristic value is the time difference between time t0 and time t1; the fourth characteristic value indicates whether the operation of the disconnecting switch is smooth at the beginning of opening or closing.
[0085] The fifth characteristic value is the time difference between time t2 and time t3; the fifth characteristic value indicates whether the operation of the disconnecting switch is smooth at the end of the opening or closing phase.
[0086] S103. Determine the fault type of the disconnecting switch based on the characteristic values in the characteristic combination and the preset characteristic values; wherein, the preset characteristic values are the characteristic values obtained when the disconnecting switch changes state based on normal operation.
[0087] For example, a normal current-time relationship diagram of a normally operating disconnecting switch during opening or closing is obtained; based on the normal current-time relationship diagram, preset characteristic values are determined when the normally operating disconnecting switch is opened or closed. The preset characteristic values include a first preset characteristic value, a second preset characteristic value, a third preset characteristic value, a fourth preset characteristic value, and a fifth preset characteristic value.
[0088] Based on the feature values and preset feature values in the feature combination, the parameter value corresponding to each feature value is calculated. The formula for calculating the parameter value is: Parameter value = (Feature value - Preset feature value) / Preset feature value.
[0089] The fault type of the disconnecting switch is determined based on the parameter values corresponding to each characteristic value.
[0090] This application provides a fault detection method for disconnecting switches. It acquires a current-time relationship diagram when the disconnecting switch undergoes state changes (opening or closing). This diagram clearly characterizes the current changes during the state change. Subsequently, a feature combination of the disconnecting switch is determined based on the current-time relationship diagram. The feature values in this combination encompass various information, including the overall current change during state changes, the current change during stable periods, and the time differences corresponding to different current change periods. These feature values reflect the electrical characteristics of the disconnecting switch during state changes from different perspectives. Finally, the feature values in the feature combination are compared with preset feature values obtained when the disconnecting switch undergoes state changes under normal operation. The fault type of the disconnecting switch is determined based on the comparison results. This method avoids the complex signal processing of existing technologies, simplifies the calculation steps, and improves the efficiency and accuracy of fault detection. It effectively solves the problems of low accuracy and low efficiency in fault detection in existing technologies, achieving the beneficial effect of rapid and accurate detection of disconnecting switch fault types.
[0091] Figure 3 A flowchart illustrating a fault detection method for a disconnecting switch provided in this application embodiment. Figure 2 ,like Figure 3 As shown, in this embodiment... Figure 1 Based on the embodiments, a fault detection method for a disconnecting switch is described in detail, the method comprising:
[0092] S301. Obtain the current-time relationship diagram when the disconnecting switch undergoes state changes.
[0093] For example, this step can refer to step S101 above, and will not be repeated here.
[0094] S302. Based on the current-time relationship diagram, determine the time set; wherein the time set includes one or more of the following: first time, second time, third time, and fourth time; the first time represents the starting time of the current in the current-time relationship diagram; the second time represents the time corresponding to the first occurrence of the current peak in the current-time relationship diagram; the third time represents the time corresponding to the last occurrence of the current peak in the current-time relationship diagram; and the fourth time represents the time corresponding to the disappearance of the current in the current-time relationship diagram. Based on the changes in the current of the disconnecting switch between different times in the time set, and / or based on the time difference corresponding to different current change periods in the current-time relationship diagram, determine the characteristic combination of the disconnecting switch.
[0095] For example, a time set is determined based on the current-time relationship diagram; wherein the time set includes one or more of the following: first time, second time, third time, and fourth time.
[0096] like Figure 2 As shown, the first time point is t0, which refers to the initial current in the current-time relationship graph. The second time point is t1, which refers to the moment when the current reaches its first peak value in the current-time relationship graph. The third time point is t2, which refers to the moment when the current reaches its last peak value in the current-time relationship graph. The fourth time point is t3, which refers to the moment when the current disappears in the current-time relationship graph.
[0097] Based on the changes in the current of the disconnecting switch between different times in the time set, and / or based on the time difference corresponding to different current change periods in the current-time relationship diagram, the characteristic combination of the disconnecting switch is determined.
[0098] S303. The feature combination includes a first feature value, a second feature value, a third feature value, a fourth feature value, and a fifth feature value; wherein, the first feature value is the integral value of the current of the disconnecting switch from the first time to the fourth time; the second feature value is the average value of the current of the disconnecting switch from the second time to the fourth time; the third feature value is the time difference between the second time and the third time; the fourth feature value is the time difference between the first time and the second time; and the fifth feature value is the time difference between the third time and the fourth time.
[0099] For example, the feature combination includes a first feature value, a second feature value, a third feature value, a fourth feature value, and a fifth feature value.
[0100] like Figure 2As shown, the first characteristic value is the integral of the current from time t0 to t3; this indicates the amount of energy consumed when the disconnecting switch closes or opens. The second characteristic value is the average of the current from time t1 to t2; this indicates whether the disconnecting switch experiences jamming or freewheeling during opening or closing. The third characteristic value is the time difference between time t1 and t2; this indicates the time consumed during opening or closing, reflecting whether jamming or obstruction occurs. The fourth characteristic value is the time difference between time t0 and t1; this indicates whether the disconnecting switch operates smoothly at the beginning of opening or closing. The fifth characteristic value is the time difference between time t2 and t3; this indicates whether the disconnecting switch operates smoothly at the end of opening or closing.
[0101] S304. For each feature value in the feature combination, determine the parameter value corresponding to the feature value based on the feature value and the preset feature value corresponding to the feature value; wherein, the parameter value characterizes the fault condition of the disconnecting switch; determine the fault type of the disconnecting switch based on at least two parameter values.
[0102] For example, for each feature value in the feature combination, a parameter value corresponding to the feature value is determined based on the feature value and a preset feature value corresponding to the feature value; wherein the parameter value characterizes the fault condition of the disconnecting switch; and the fault type of the disconnecting switch is determined based on at least two parameter values.
[0103] Based on the first feature value and the first preset feature value, the parameter value corresponding to the first feature value is determined to be the first parameter value; based on the second feature value and the second preset feature value, the parameter value corresponding to the second feature value is determined to be the second parameter value; based on the third feature value and the third preset feature value, the parameter value corresponding to the third feature value is determined to be the third parameter value; based on the fourth feature value and the fourth preset feature value, the parameter value corresponding to the fourth feature value is determined to be the fourth parameter value; based on the fifth feature value and the fifth preset feature value, the parameter value corresponding to the fifth feature value is determined to be the fifth parameter value.
[0104] Determine the fault type of the disconnector switch based on at least two parameter values.
[0105] In one example, the parameter value corresponding to the i-th feature value is ;
[0106] in, For the i-th eigenvalue, Let i be the preset feature value corresponding to the i-th feature value, where i is a positive integer greater than or equal to 1.
[0107] For example, based on the first feature value and the first preset feature value, the parameter value corresponding to the first feature value is determined to be the first parameter value. The formula for calculating the first parameter value is: ;
[0108] in, The first parameter value; The first eigenvalue, The first preset feature value is the first feature value corresponding to the first feature value.
[0109] Based on the second eigenvalue and the second preset eigenvalue, the parameter value corresponding to the second eigenvalue is determined to be the second parameter value. The formula for calculating the second parameter value is: ;
[0110] in, This is the value of the second parameter; This is the second eigenvalue. The second preset feature value is the feature value corresponding to the second feature value.
[0111] Based on the third eigenvalue and the third preset eigenvalue, the parameter value corresponding to the third eigenvalue is determined to be the third parameter value. The formula for calculating the third parameter value is: ;
[0112] in, The value of the third parameter; The third eigenvalue, The third preset feature value is the feature value corresponding to the third feature value.
[0113] Based on the fourth eigenvalue and the fourth preset eigenvalue, the parameter value corresponding to the fourth eigenvalue is determined to be the fourth parameter value. The formula for calculating the fourth parameter value is: ;
[0114] in, This is the value of the fourth parameter; The fourth eigenvalue, This is the fourth preset feature value corresponding to the fourth feature value.
[0115] Based on the fifth eigenvalue and the fifth preset eigenvalue, the parameter value corresponding to the fifth eigenvalue is determined to be the fifth parameter value. The formula for calculating the fifth parameter value is: ;
[0116] in, The value of the fifth parameter; The fifth eigenvalue, This is the fifth preset feature value corresponding to the fifth feature value.
[0117] In one example, if the parameter value corresponding to the first feature value is less than the first preset threshold, and the parameter value corresponding to the fourth feature value is less than the second preset threshold and greater than the third preset threshold, then the fault type of the disconnecting switch is determined to be a slight jamming fault type.
[0118] If the parameter value corresponding to the first feature value is greater than the first preset threshold, and the parameter value corresponding to the second feature value is less than the fourth preset threshold, and the parameter value corresponding to the third feature value is less than the fifth preset threshold, then the fault type of the disconnecting switch is determined to be a moderate jamming fault type.
[0119] For example, if the value of the first parameter is less than the first preset threshold, and the value of the fourth parameter is less than the second preset threshold and greater than the third preset threshold, then the fault type of the disconnecting switch is determined to be a slight jamming fault type.
[0120] Optionally, if the first parameter value is less than 20% and 5% is less than the fourth parameter value and less than 10%, then the fault type of the disconnecting switch is determined to be a slight jamming fault type.
[0121] For example, if the value of the first parameter is greater than the first preset threshold, the value of the second parameter is less than the fourth preset threshold, and the value of the third parameter is less than the fifth preset threshold, then the fault type of the disconnecting switch is determined to be a moderate jamming fault type.
[0122] Optionally, if the first parameter value is greater than 20%, the second parameter value is less than 25%, and the third parameter value is less than 15%, then the fault type of the disconnecting switch is determined to be a moderate jamming fault type.
[0123] In one example, if the parameter value corresponding to the first feature value is greater than the first preset threshold, and the parameter value corresponding to the second feature value is less than the fourth preset threshold, and the parameter value corresponding to the third feature value is greater than the fifth preset threshold, and the parameter value corresponding to the fourth feature value is greater than the sixth preset threshold, then the fault type of the disconnecting switch is determined to be a severe jamming fault type.
[0124] If the parameter value corresponding to the first feature value is greater than the first preset threshold, and the parameter value corresponding to the second feature value is less than the fourth preset threshold, and the parameter value corresponding to the third feature value is greater than the fifth preset threshold, and the parameter value corresponding to the fourth feature value is less than the sixth preset threshold, and the parameter value corresponding to the fifth feature value is greater than the sixth preset threshold, then the fault type of the disconnecting switch is determined to be the limit device fault type.
[0125] For example, if the first parameter value is greater than the first preset threshold, the second parameter value is less than the fourth preset threshold, the third parameter value is greater than the fifth preset threshold, and the fourth parameter value is greater than the sixth preset threshold, then the fault type of the disconnecting switch is determined to be a severe jamming fault type.
[0126] Optionally, if the first parameter value is greater than 20%, the second parameter value is less than 25%, the third parameter value is greater than 15%, and the fourth parameter value is greater than 15%, then the fault type of the disconnecting switch is determined to be a severe jamming fault type.
[0127] For example, if the first parameter value is greater than the first preset threshold, the second parameter value is less than the fourth preset threshold, the third parameter value is greater than the fifth preset threshold, the fourth parameter value is less than the sixth preset threshold, and the fifth parameter value is greater than the sixth preset threshold, then the fault type of the disconnecting switch is determined to be the limit device fault type.
[0128] Optionally, if the first parameter value is greater than 20%, the second parameter value is less than 25%, the third parameter value is greater than 15%, the fourth parameter value is less than 15%, and the fifth parameter value is greater than 15%, then the fault type of the disconnecting switch is determined to be the limit device fault type.
[0129] In addition to the fault types described in the above embodiments, this application also includes the determination of disconnector switch idling fault and disconnector switch normal operating condition.
[0130] For example, if the value of the first parameter is greater than the first preset threshold and the value of the second parameter is greater than the fourth preset threshold, then the fault type of the disconnecting switch is determined to be an idling fault type.
[0131] Optionally, if the first parameter value is greater than 20% and the second parameter value is greater than 25%, then the fault type of the disconnecting switch is determined to be an idling fault type.
[0132] For example, if the value of the first parameter is less than the first preset threshold and the value of the fourth parameter is less than the third preset threshold, then the disconnector is determined to be in normal working condition.
[0133] Optionally, if the value of the first parameter is less than 20% and the value of the fourth parameter is less than 5%, the disconnector is considered to be operating normally.
[0134] S305. Generate and issue alarm information according to the fault type; wherein the alarm information indicates the fault type.
[0135] For example, an alarm message is generated and issued based on the fault type; wherein the alarm message indicates the fault type.
[0136] This application provides a fault detection method for a disconnecting switch. It acquires a current-time relationship diagram of the disconnecting switch during state changes (opening or closing) and accurately determines a time set based on this diagram. This time set covers key time nodes such as the current initiation time, the first current peak time, the last current peak time, and the current disappearance time. These time nodes provide a clear time reference for subsequent analysis of current changes. Subsequently, based on the current changes of the disconnecting switch between different times in the time set, and / or based on the time differences corresponding to different current change periods in the current-time relationship diagram, a combination of features is determined, including a first feature value (the integral value of the current from the first to the fourth time), a second feature value (the average current from the second to the fourth time), a third feature value (the time difference between the second and third times), a fourth feature value (the time difference between the first and second times), and a fifth feature value (the time difference between the third and fourth times). These feature values comprehensively reflect the current characteristics of the disconnecting switch during state changes from multiple dimensions. For each feature value in the feature combination, it is compared with the corresponding preset feature value to determine the parameter value characterizing the disconnector switch fault. This refined comparative analysis allows for more accurate capture of abnormal features of the disconnector switch. The fault type of the disconnector switch is then determined based on at least two parameter values, avoiding errors that may arise from judging based on a single parameter. Finally, based on the determined fault type, an alarm message containing fault type information is generated and issued. Through this series of methods, accurate detection, precise classification, and timely alarm of disconnector switch faults are achieved. This enables the timely discovery of various faults occurring during disconnector switch operation, providing maintenance personnel with accurate fault information for rapid repair measures, effectively preventing further escalation of the fault, improving the operational stability and safety of the power system, and reducing the risk of power outages and economic losses caused by disconnector switch faults.
[0137] Figure 4 A schematic diagram of the structure of a fault detection device for a disconnecting switch provided in this application embodiment. Figure 1 ,like Figure 4 As shown, the fault detection device 40 for the disconnecting switch provided in this embodiment includes:
[0138] The acquisition module 401 is used to acquire the current-time relationship diagram when the disconnecting switch undergoes a state change; wherein, the state change is either opening or closing, and the current-time relationship diagram characterizes the change of current in the disconnecting switch when the disconnecting switch undergoes a state change;
[0139] The first determining module 402 is used to determine the characteristic combination of the disconnecting switch according to the current-time relationship diagram; wherein, the characteristic value in the characteristic combination represents one or more of the following: the overall current change of the disconnecting switch when the disconnecting switch undergoes a state change, the current change of the disconnecting switch during the steady period, and the time difference corresponding to different current change periods in the current-time relationship diagram.
[0140] The second confirmation module 403 is used to determine the fault type of the disconnecting switch based on the feature value in the feature combination and the preset feature value; wherein, the preset feature value is the feature value obtained when the disconnecting switch changes state based on normal operation.
[0141] This embodiment provides a fault detection device for a disconnecting switch, which can execute the method provided in the above-described method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.
[0142] Figure 5 A schematic diagram of the structure of a fault detection device for a disconnecting switch provided in this application embodiment. Figure 1 ,like Figure 5 As shown, the fault detection device 50 for the disconnecting switch provided in this embodiment includes:
[0143] The acquisition module 501 is used to acquire the current-time relationship diagram when the disconnecting switch undergoes a state change; wherein, the state change is either opening or closing, and the current-time relationship diagram characterizes the change of current in the disconnecting switch when the disconnecting switch undergoes a state change;
[0144] The first determining module 502 is used to determine the characteristic combination of the disconnecting switch according to the current-time relationship diagram; wherein, the characteristic value in the characteristic combination represents one or more of the following: the overall current change of the disconnecting switch when the disconnecting switch undergoes a state change, the current change of the disconnecting switch during the steady period, and the time difference corresponding to different current change periods in the current-time relationship diagram.
[0145] The second confirmation module 503 is used to determine the fault type of the disconnecting switch based on the feature value in the feature combination and the preset feature value; wherein, the preset feature value is the feature value obtained when the disconnecting switch changes state based on normal operation.
[0146] In one possible implementation, the first determining module 502 includes:
[0147] Based on the current-time relationship diagram, determine the time set; wherein the time set includes one or more of the following: first time, second time, third time, and fourth time; the first time represents the starting time of the current in the current-time relationship diagram; the second time represents the time corresponding to the first occurrence of the current peak in the current-time relationship diagram; the third time represents the time corresponding to the last occurrence of the current peak in the current-time relationship diagram; and the fourth time represents the time corresponding to the current disappearing in the current-time relationship diagram.
[0148] Based on the changes in the current of the disconnecting switch between different times in the time set, and / or based on the time difference corresponding to different current change periods in the current-time relationship diagram, the characteristic combination of the disconnecting switch is determined.
[0149] In one possible implementation, the feature combination includes a first feature value, a second feature value, a third feature value, a fourth feature value, and a fifth feature value;
[0150] Among them, the first characteristic value is the integral value of the current of the disconnecting switch from the first time to the fourth time; the second characteristic value is the average value of the current of the disconnecting switch from the second time to the fourth time; the third characteristic value is the time difference between the second time and the third time; the fourth characteristic value is the time difference between the first time and the second time; and the fifth characteristic value is the time difference between the third time and the fourth time.
[0151] In one possible implementation, the second confirmation module 503 includes:
[0152] For each feature value in the feature combination, a parameter value corresponding to the feature value is determined based on the feature value and the preset feature value corresponding to the feature value; wherein, the parameter value represents the fault condition of the disconnecting switch;
[0153] Determine the fault type of the disconnector switch based on at least two parameter values.
[0154] In one possible implementation, the parameter value corresponding to the i-th feature value is ;
[0155] in, For the i-th eigenvalue, Let i be the preset feature value corresponding to the i-th feature value, where i is a positive integer greater than or equal to 1.
[0156] In one possible implementation, the fault type of the disconnecting switch is determined based on at least two parameter values, including:
[0157] If the parameter value corresponding to the first feature value is less than the first preset threshold, and the parameter value corresponding to the fourth feature value is less than the second preset threshold and greater than the third preset threshold, then the fault type of the disconnecting switch is determined to be a slight jamming fault type.
[0158] If the parameter value corresponding to the first feature value is greater than the first preset threshold, and the parameter value corresponding to the second feature value is less than the fourth preset threshold, and the parameter value corresponding to the third feature value is less than the fifth preset threshold, then the fault type of the disconnecting switch is determined to be a moderate jamming fault type.
[0159] In one possible implementation, the fault type of the disconnecting switch is determined based on at least two parameter values, including:
[0160] If the parameter value corresponding to the first feature value is greater than the first preset threshold, and the parameter value corresponding to the second feature value is less than the fourth preset threshold, and the parameter value corresponding to the third feature value is greater than the fifth preset threshold, and the parameter value corresponding to the fourth feature value is greater than the sixth preset threshold, then the fault type of the disconnecting switch is determined to be a severe jamming fault type.
[0161] If the parameter value corresponding to the first feature value is greater than the first preset threshold, and the parameter value corresponding to the second feature value is less than the fourth preset threshold, and the parameter value corresponding to the third feature value is greater than the fifth preset threshold, and the parameter value corresponding to the fourth feature value is less than the sixth preset threshold, and the parameter value corresponding to the fifth feature value is greater than the sixth preset threshold, then the fault type of the disconnecting switch is determined to be the limit device fault type.
[0162] In one possible implementation, the device 50 further includes:
[0163] The alarm module 504 is used to generate and issue alarm information according to the fault type; wherein the alarm information indicates the fault type.
[0164] This embodiment provides a fault detection device for a disconnecting switch, which can execute the method provided in the above-described method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.
[0165] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 6 As shown, the electronic device 60 provided in this embodiment includes at least one processor 601 and a memory 602. Optionally, the device 60 further includes a communication component 603. The processor 601, memory 602, and communication component 603 are connected via a bus 604.
[0166] In a specific implementation, at least one processor 601 executes computer execution instructions stored in memory 602, causing at least one processor 601 to perform the above-described method.
[0167] The specific implementation process of processor 601 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.
[0168] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.
[0169] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.
[0170] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.
[0171] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.
[0172] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.
[0173] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.
[0174] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.
[0175] The division of units is merely a logical functional division; 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 indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.
[0176] 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.
[0177] In addition, 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.
[0178] If a function 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 this invention, or the part that contributes to the prior art, or a 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 this 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.
[0179] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.
[0180] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.
Claims
1. A fault detection method for a disconnecting switch, characterized in that, include: Obtain the current-time relationship diagram when the disconnecting switch undergoes a state change; wherein, the state change is either opening or closing, and the current-time relationship diagram characterizes the change of current in the disconnecting switch when the disconnecting switch undergoes a state change; Based on the current-time relationship diagram, the characteristic combination of the disconnecting switch is determined; wherein, the characteristic value in the characteristic combination represents one or more of the following: the overall current change of the disconnecting switch when the disconnecting switch undergoes a state change, the current change of the disconnecting switch during the steady period, and the time difference corresponding to different current change periods in the current-time relationship diagram. The fault type of the disconnecting switch is determined based on the feature values in the feature combination and the preset feature values; wherein, the preset feature values are feature values obtained when the state of the disconnecting switch changes during normal operation.
2. The method according to claim 1, characterized in that, Based on the current-time relationship diagram, the characteristic combination of the disconnecting switch is determined, including: Based on the current-time relationship diagram, a set of time points is determined; wherein, the set of time points includes one or more of the following: a first time point, a second time point, a third time point, and a fourth time point; the first time point represents the starting time of the current in the current-time relationship diagram; the second time point represents the time corresponding to the first occurrence of a current peak in the current-time relationship diagram; the third time point represents the time corresponding to the last occurrence of a current peak in the current-time relationship diagram; and the fourth time point represents the time corresponding to the current disappearing in the current-time relationship diagram. The characteristic combination of the disconnecting switch is determined based on the variation of the current of the disconnecting switch between different times in the time set, and / or based on the time difference corresponding to different current change periods in the current-time relationship diagram.
3. The method according to claim 2, characterized in that, The feature combination includes a first feature value, a second feature value, a third feature value, a fourth feature value, and a fifth feature value; Wherein, the first characteristic value is the integral value of the current of the disconnecting switch from the first time to the fourth time; the second characteristic value is the average value of the current of the disconnecting switch from the second time to the fourth time; the third characteristic value is the time difference between the second time and the third time; the fourth characteristic value is the time difference between the first time and the second time; and the fifth characteristic value is the time difference between the third time and the fourth time.
4. The method according to claim 1, characterized in that, Based on the feature values in the feature combination and the preset feature values, the fault type of the disconnecting switch is determined, including: For each feature value in the feature combination, a parameter value corresponding to the feature value is determined based on the feature value and the preset feature value corresponding to the feature value; wherein, the parameter value represents the fault condition of the disconnecting switch; The fault type of the disconnecting switch is determined based on at least two parameter values.
5. The method according to claim 4, characterized in that, The parameter value corresponding to the i-th feature value is ; in, For the i-th eigenvalue, Let i be the preset feature value corresponding to the i-th feature value, where i is a positive integer greater than or equal to 1.
6. The method according to claim 4, characterized in that, The fault type of the disconnecting switch is determined based on at least two parameter values, including: If the parameter value corresponding to the first feature value is less than the first preset threshold, and the parameter value corresponding to the fourth feature value is less than the second preset threshold and greater than the third preset threshold, then the fault type of the disconnecting switch is determined to be a slight jamming fault type. If the parameter value corresponding to the first feature value is greater than the first preset threshold, and the parameter value corresponding to the second feature value is less than the fourth preset threshold, and the parameter value corresponding to the third feature value is less than the fifth preset threshold, then the fault type of the disconnecting switch is determined to be a moderate jamming fault type.
7. The method according to claim 4, characterized in that, The fault type of the disconnecting switch is determined based on at least two parameter values, including: If the parameter value corresponding to the first feature value is greater than the first preset threshold, and the parameter value corresponding to the second feature value is less than the fourth preset threshold, and the parameter value corresponding to the third feature value is greater than the fifth preset threshold, and the parameter value corresponding to the fourth feature value is greater than the sixth preset threshold, then the fault type of the disconnecting switch is determined to be a severe jamming fault type. If the parameter value corresponding to the first feature value is greater than the first preset threshold, and the parameter value corresponding to the second feature value is less than the fourth preset threshold, and the parameter value corresponding to the third feature value is greater than the fifth preset threshold, and the parameter value corresponding to the fourth feature value is less than the sixth preset threshold, and the parameter value corresponding to the fifth feature value is greater than the sixth preset threshold, then the fault type of the disconnecting switch is determined to be the limit device fault type.
8. The method according to any one of claims 1-7, characterized in that, The method further includes: Based on the fault type, an alarm message is generated and issued; wherein the alarm message indicates the fault type.
9. A fault detection device for a disconnecting switch, characterized in that, include: The acquisition module is used to acquire the current-time relationship diagram when the disconnecting switch undergoes a state change; wherein the state change is opening or closing, and the current-time relationship diagram characterizes the change of current in the disconnecting switch when the disconnecting switch undergoes a state change; The first determining module is used to determine the characteristic combination of the disconnecting switch according to the current-time relationship diagram; wherein, the characteristic value in the characteristic combination represents one or more of the following: the overall current change of the disconnecting switch when the disconnecting switch undergoes a state change, the current change of the disconnecting switch during the steady period, and the time difference corresponding to different current change periods in the current-time relationship diagram. The second confirmation module is used to determine the fault type of the disconnecting switch based on the feature values in the feature combination and the preset feature values; wherein the preset feature values are feature values obtained when the disconnecting switch undergoes a state change based on normal operation.
10. An electronic device, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in any one of claims 1-8.