Relay protection and exit matrix detection device

Abstract

The embodiment of the invention discloses a relay protection and exit matrix detection device. The relay protection and exit matrix detection device comprises a delay detection module, wherein the delay detection module obtains signal delay when each input interface transmits different input signals and calculates a priority index; the signal acquisition unit acquires an input signal; the voltage and current detection unit detects the voltage and current of the signal; the matching library stores historical matching results of different input signals and input interfaces; the matching unit determines a matching interface according to the matching result, or determines the matching interface according to the priority index, and transmits the signal to the input interface matched with the matching unit; the input interface inputs a signal into the internal transmission unit; the internal transmission unit transmits the signal to the processing module; and the processing module processes the signal. A proper input interface is selected according to a historical matching result, or a proper input interface is selected by detecting signal delay according to the relationship between the signal delay and current and voltage and the priority index of each interface, so that the signal delay is reduced.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of power systems, and particularly to a relay protection and outlet matrix detection device. Background Art

[0002] In a power system, the outlet matrix usually refers to the state control and monitoring matrix of various control devices such as circuit breakers and switches. These devices are responsible for functions such as current in and out of the power system, line switching, and load regulation. Outlet matrix detection is mainly used to detect the states of these devices, ensure their normal operation, and perform protection or control operations when necessary.

[0003] Currently, for the detection of relay protection outlet matrices, relay protection testers are mainly relied on, but they can only measure the tripping standby contacts and cannot comprehensively measure the outlet matrix. Especially in the case of a relatively complex outlet matrix in a 220 kV conventional substation, such as the calibration work of 220 kV line protection, main transformer protection, bus differential protection, etc., the problem is more prominent; in addition, there is generally a problem of high delay in existing outlet matrix detection devices. Summary of the Invention

[0004] The embodiments of the present invention provide a relay protection and outlet matrix detection device, which selects a suitable input interface according to historical matching results, or by detecting signal delay, and according to the relationship between signal delay and current and voltage and the priority index of each interface, selects a suitable input interface, thereby reducing signal delay.

[0005] According to an aspect of the embodiments of the present invention, there is provided a relay protection and outlet matrix detection device, including:

[0006] An input module, a processing module, and a delay detection module;

[0007] The processing module is electrically connected to both the input module and the delay detection module; the input module includes a signal acquisition unit, a voltage detection unit, a current detection unit, a matching unit, a matching library, a plurality of input interfaces, and an internal transmission unit;

[0008] The delay detection module is configured to obtain the signal delay when each input interface transmits input signals of different voltages and currents, and calculate the priority index of each input interface according to the signal delay when each input interface transmits input signals of different voltages and currents, wherein the priority index reflects the delay situation when the input interface transmits input signals.

[0009] The signal acquisition unit is used to acquire the current input signals of the relay protection device and the output matrix; the voltage detection unit is used to detect the voltage of the current input signals; the current detection unit is used to detect the current of the current input signals; the matching library is used to store the historical matching results of the input signals with different voltages and / or different currents and multiple input interfaces; the matching unit is used to determine the input interface that matches the current input signal according to the historical matching results and the current and voltage of the current input signal, or the matching unit is used to determine the input interface that matches the current input signal according to the priority index of each input interface, and transmit the current input signal to the input interface that matches it; the input interface is used to input the current input signal into the internal transmission unit; the internal transmission unit is used to transmit the current input signal to the processing module;

[0010] The processing module is used to process the current input signal transmitted by the internal transmission unit.

[0011] Optionally, when there is a matching result corresponding to the current input signal in the historical matching results, the matching unit is used to determine the input interface that matches the current input signal according to the historical matching results; when there is no matching result corresponding to the current input signal in the historical matching results, the matching unit is used to determine the input interface that matches the current input signal according to the priority index of each input interface.

[0012] Optionally, the delay detection module is used for:

[0013] Determine the current relationship formula between the current of the input signal and the signal delay, and the voltage relationship formula between the voltage of the input signal and the signal delay according to the signal delay when each input interface transmits input signals with different voltages and currents;

[0014] Determine the mean square error of the current relationship formula and the mean square error of the voltage relationship formula;

[0015] According to the mean square error of the current relationship formula, the mean square error of the voltage relationship formula, the number of current data groups composed of the current and signal delay used to determine the current relationship formula, the number of voltage data groups composed of the voltage and signal delay used to determine the voltage relationship formula, the current in each current data group, the signal delay in each current data group, the voltage in each voltage data group, the signal delay in each voltage data group, the maximum current in all current data groups, the minimum current in all current data groups, the maximum voltage in all voltage data groups, and the minimum voltage in all voltage data groups, determine the priority index.

[0016] Optionally, the delay detection module is used for:

[0017] Fit the current and signal delay of the input signal according to different fitting models respectively, and determine the current relationship formula between the current and signal delay corresponding to different fitting models;

[0018] The voltage and signal delay of the input signal are respectively fitted according to different fitting models to determine the voltage relationship formulas of the voltage and signal delay corresponding to different fitting models.

[0019] Determine the mean square error of each relationship formula, and use the current relationship formula with the minimum mean square error as the relationship formula between the current and signal delay of the input signal, and use the voltage relationship formula with the minimum mean square error as the relationship formula between the voltage and signal delay of the input signal.

[0020] Optionally, the delay detection module is used for:

[0021] According to the signal delay of the input signal whose voltage transmitted by each input interface is greater than or equal to the first set voltage value and less than or equal to the second set voltage value, and the current is greater than or equal to the first set current value and less than or equal to the second set current value, calculate the first priority index of each input interface;

[0022] According to the signal delay of the input signal whose voltage transmitted by each input interface is less than the first set voltage value, the signal delay of the input signal whose voltage is greater than the second set voltage value, the signal delay of the input signal whose current is less than the first set current value, and the signal delay of the input signal whose current is greater than the second set current value, calculate the second priority index of each input interface;

[0023] The matching unit is used for:

[0024] When the voltage of the current input signal is greater than or equal to the first set voltage value and less than or equal to the second set voltage value, and the current is greater than or equal to the first set current value and less than or equal to the second set current value, determine the input interface matched by the current input signal according to the first priority index of each input interface;

[0025] When the signal delay of the input signal whose voltage of the current input signal is less than the first set voltage value, or the signal delay of the input signal whose voltage of the current input signal is greater than the second set voltage value, or the signal delay of the input signal whose current of the current input signal is less than the first set current value, or the current of the current input signal is greater than the second set current value, determine the input interface matched by the current input signal according to the second priority index of each input interface.

[0026] Optionally, the delay detection module is used to calculate the first priority index according to the following formula:

[0027]

[0028] Among them, YXD is the first priority index, DE = F1(I) is the first relational expression of current and signal delay when the current of the input signal is greater than or equal to the first set current value and less than or equal to the second set current value, and DE = F2(U) is the second relational expression of voltage and signal delay when the voltage of the input signal is greater than or equal to the first set voltage value and less than or equal to the second set voltage value; DE is the signal delay, I is the current of the input signal, U is the voltage of the input signal, K1 is the mean square error corresponding to DE = F1(I), K2 is the mean square error corresponding to DE = F2(U), IXD is the first current priority parameter, UXD is the first voltage priority parameter, num1 is the number of current data groups formed by pairing the current and signal delay used to determine the first relational expression, num2 is the number of voltage data groups formed by pairing the voltage and signal delay used to determine the second relational expression, de a is the signal delay in the a-th current data group, I a is the current value in the a-th current data group, de b is the signal delay in the b-th voltage data group, U b is the voltage value in the b-th voltage data group, I max is the maximum current value in all current data groups, I min is the minimum current value in all current data groups, U max is the maximum voltage value in all voltage data groups, U min is the minimum voltage value in all voltage data groups;

[0029] The delay detection module is used to calculate the second priority index according to the following formula:

[0030]

[0031] Among them, NYXD is the second priority index; DE = F3(I) is the third relational expression of current and signal delay when the current of the input signal is greater than the second set current value; DE = F6(I) is the sixth relational expression of current and signal delay when the current of the input signal is less than the first set current value; DE = F4(U) is the fourth relational expression of voltage and signal delay when the voltage of the input signal is greater than the second set voltage value; DE = F5(U) is the fifth relational expression of voltage and signal delay when the voltage of the input signal is less than the first set voltage value; K3 is the mean square error corresponding to DE = F3(I), K4 is the mean square error corresponding to DE = F4(U), K5 is the mean square error corresponding to DE = F5(U), and K6 is the mean square error corresponding to DE = F6(I); NIXD is the second current priority parameter, NUXD is the second voltage priority parameter, num3 is the number of current data groups composed of current and signal delay pairs used to determine the sixth relational expression, num4 is the number of voltage data groups composed of current and signal delay pairs used to determine the third relational expression, num5 is the number of voltage data groups composed of voltage and signal delay pairs used to determine the fifth relational expression, num6 is the number of current data groups composed of voltage and signal delay pairs used to determine the fourth relational expression, and I e is the rated current, de c is the signal delay in the c-th current data group in the current data groups used to determine the sixth relational expression, and I c is the current value in the c-th current data group in the current data groups used to determine the sixth relational expression, and U e is the rated voltage, de d is the signal delay in the d-th voltage data group in the voltage data groups used to determine the fifth relational expression, and U d is the voltage value in the d-th voltage data group in the voltage data groups used to determine the fifth relational expression.

[0032] Optionally, the first set current value is less than the rated current value, and the difference between the rated current and the first set current value is 10% of the rated current;

[0033] The second set current value is greater than the rated current value, and the difference between the second set current value and the rated current is 10% of the rated current;

[0034] The first set voltage value is less than the rated voltage value, and the difference between the rated voltage and the first set voltage value is 10% of the rated voltage;

[0035] The second set voltage value is greater than the rated voltage value, and the difference between the second set voltage value and the rated voltage is 10% of the rated voltage.

[0036] Optionally, the relay protection and outlet matrix detection device further includes:

[0037] A display module and a timing module;

[0038] The timing module is electrically connected to the display module, the delay detection module and the processing module, and the display module is electrically connected to the processing module;

[0039] The display module is used to receive a detection instruction and send the detection instruction to the input module, and display the processing result of the processing module;

[0040] The input module is used to receive the corresponding input signals from the relay protection device and the outlet matrix after receiving the detection instruction;

[0041] The timing module is used to record the first time when the display module receives the detection instruction, and record the second time when the processing module receives the input signal, and send the first time and the second time to the delay detection module;

[0042] The delay detection module is used to determine the signal delay when each input interface transmits input signals with different voltages and currents according to the voltage of the input signal detected by the voltage detection unit, the current of the input signal detected by the current detection unit, as well as the second time and the first time.

[0043] Optionally, the delay detection module includes a timing information storage unit, a delay calculation unit, and an interface priority index calculation unit;

[0044] The timing information storage unit is used to store the second time and the first time;

[0045] The delay calculation unit is used to determine the signal delay when each input interface transmits input signals with different voltages and currents according to the voltage of the input signal detected by the voltage detection unit, the current of the input signal detected by the current detection unit, as well as the second time and the first time;

[0046] The interface priority index calculation unit is used to calculate the priority index of each input interface according to the signal delay when each input interface transmits input signals with different voltages and currents.

[0047] Optionally, the processing module includes a data processing unit, an algorithm storage unit, and a data analysis unit;

[0048] The data processing unit is used to process the current input signal;

[0049] The algorithm storage unit is used to store the algorithms for various detections;

[0050] The data analysis unit is used to schedule the algorithms stored in the algorithm storage unit according to the detection instruction, and analyze the current input signal processed by the data processing unit;

[0051] The data processing unit includes a filter, a signal amplifier, and an analog-to-digital converter;

[0052] The filter is used to filter the current input signal;

[0053] The signal amplifier is used to amplify the filtered current input signal;

[0054] The analog-to-digital converter is used to convert the format of the current input signal after filtering and amplification;

[0055] The input module further includes an indicator light and a protection circuit;

[0056] The indicator light is connected to the input interface in a one-to-one correspondence;

[0057] The protection circuit is arranged between the input interface and the internal transmission unit. The protection circuit includes a diode or a fuse, and the protection circuit is used to protect the internal transmission unit from overvoltage or transient current.

[0058] The relay protection and outlet matrix detection device provided by the embodiment of the present invention includes an input module, a processing module, and a delay detection module; the signal acquisition unit acquires the current input signals of the relay protection device and the outlet matrix; the voltage and current detection unit detects the voltage and current of the current input signal; the matching library stores the historical matching results of the input signals with different voltages and / or different currents and multiple input interfaces; through the delay detection module, the signal delay when each input interface transmits the input signals with different voltages and currents can be obtained, and the priority index of each input interface can be calculated according to the signal delay when each input interface transmits the input signals with different voltages and currents; according to the historical matching results and the current and voltage of the current input signal, the input interface matching the current and voltage of the current input signal is determined. Since the historical matching results are the matching results with lower delays, the input interface with lower delay in the historical matching results can be selected for transmission, which can reduce the delay; or by detecting the signal delay, according to the relationship between the signal delay and the current and voltage and the priority indexes of each interface, a suitable input interface is selected. Since the priority index reflects the delay situation when the input interface transmits the input signals with different voltages and currents, the input interface corresponding to the priority index with the lowest delay situation can be selected for transmission, thereby reducing the signal delay.

[0059] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. Description of the Drawings

[0060] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0061] Figure 1 It is a module schematic diagram of a relay protection and outlet matrix detection device provided by an embodiment of the present invention.

[0062] Figure 2 It is an effect diagram of the change of IXD with num1 and num2 provided by an embodiment of the present invention.

[0063] Figure 3 It is an effect diagram of the change of UXD with num1 and num2 provided by an embodiment of the present invention.

[0064] Figure 4 It is a module schematic diagram of another relay protection and outlet matrix detection device provided by an embodiment of the present invention.

[0065] Figure 5 It is a module schematic diagram of another relay protection and outlet matrix detection device provided by an embodiment of the present invention.

[0066] Figure 6 It is a module schematic diagram of another relay protection and outlet matrix detection device provided by an embodiment of the present invention. Detailed implementation manners

[0067] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0068] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0069] An embodiment of the present invention provides a relay protection and outlet matrix detection device. Figure 1 It is a module schematic diagram of a relay protection and outlet matrix detection device provided by an embodiment of the present invention. Refer to Figure 1 , the relay protection and outlet matrix detection device includes:

[0070] An input module 10, a processing module 20, and a delay detection module 30;

[0071] The processing module 20 is electrically connected to both the input module 10 and the delay detection module 30; the input module 10 includes a signal acquisition unit 11, a voltage detection unit 12, a current detection unit 13, a matching unit 14, a matching library 15, a plurality of input interfaces 16, and an internal transmission unit 17;

[0072] The delay detection module 30 is used to obtain the signal delay when each input interface 16 transmits input signals of different voltages and currents, and calculate the priority index of each input interface 16 according to the signal delay when each input interface 16 transmits input signals of different voltages and currents. Among them, the priority index reflects the delay situation when the input interface 16 transmits input signals;

[0073] The signal acquisition unit 11 is used to acquire the current input signals of the relay protection equipment and the output matrix; the voltage detection unit 12 is used to detect the voltage of the current input signals; the current detection unit 13 is used to detect the current of the current input signals; the matching library 15 is used to store the historical matching results of the input signals with different voltages and / or different currents and multiple input interfaces 16; the matching unit 14 is used to determine the input interface 16 that matches the current input signal according to the historical matching results and the current and voltage of the current input signal, or the matching unit 14 is used to determine the input interface 16 that matches the current input signal according to the priority index of each input interface 16, and transmit the current input signal to the input interface 16 that matches it; the input interface 16 is used to input the current input signal into the internal transmission unit 17; the internal transmission unit 17 is used to transmit the current input signal to the processing module 20;

[0074] The processing module 20 is used to process the current input signal transmitted by the internal transmission unit 17.

[0075] Among them, the output matrix is composed of the output terminals of multiple relay protection equipment to be detected. The input module 10 is used to receive the input signals from the relay protection equipment and the output matrix. Among them, the input signals may include electrical parameters such as voltage and current. The historical matching results stored in the matching library are the matching results with lower delay. The processing module 20 is used to process and analyze the input signals transmitted by the input module 10. The delay detection module 30 is used to obtain the signal delay of each input interface 16 when transmitting input signals with different voltages and currents, and calculate the priority index of each input interface 16 according to the signal delay of each input interface 16 when transmitting input signals with different voltages and currents. The priority index is used to characterize the delay situation of each input interface 16 when transmitting input signals with different voltages and currents. The larger the priority index, the lower the delay generated by the corresponding input interface 16.

[0076] Specifically, the signal acquisition unit 11 acquires the current input signals of the relay protection equipment and the outlet matrix; the voltage detection unit 12 and the current detection unit 13 respectively detect the voltage and current values of the current input signals; after receiving the voltage and current detection values, the matching unit 14 starts to execute the signal matching process. The matching unit 14 first queries the matching library 15, and the matching library 15 stores the historical matching results of the input signals with different voltages and / or different currents and multiple input interfaces 16; according to the historical matching results and the voltage and current values of the current input signals, the matching unit 14 determines the input interface 16 that best matches the current input signal. Alternatively, the matching unit 14 determines the input interface 16 that best matches the current input signal according to the priority index of each input interface 16 provided by the delay detection module 30. According to the determined input interface 16, the matching unit 14 transmits the current input signal to the determined input interface 16. Exemplarily, if there are some historical data in the matching library 15 whose input signal voltage and input signal current are the same as the input signal voltage and input signal current of this input, the input interface 16 with the lowest delay in this group of historical data can be obtained to get the matching result. Transmitting the input signal through this input interface 16 can keep the detection process with low delay; it realizes selecting a suitable interface for transmission before the next detection, thereby reducing the delay and improving the detection accuracy. When the input signal voltage and input signal current cannot be measured or the corresponding matching result cannot be found, the matching unit 14 preferentially selects the interface with the highest priority index according to the priority index of each input interface 16 and transmits the current input signal to this interface, which can reduce the signal delay. After receiving the current input signal from the matching unit 14, the input interface 16 inputs the current input signal into the internal transmission unit 17; the internal transmission unit 17 transmits the current input signal to the processing module 20; after receiving the current input signal transmitted from the internal transmission unit 17, the processing module 20 starts to process the input signal.

[0077] The relay protection and outlet matrix detection device provided by the embodiment of the present invention includes an input module 10, a processing module 20, and a delay detection module 30; a signal acquisition unit 11 acquires the current input signals of the relay protection device and the outlet matrix; a voltage and current detection unit 12 detects the voltage and current of the current input signals; a matching library 15 stores the historical matching results of the input signals with different voltages and / or different currents and multiple input interfaces 16; through the delay detection module 30, the signal delay when each input interface 16 transmits the input signals with different voltages and currents can be obtained, and the priority index of each input interface 16 can be calculated according to the signal delay when each input interface 16 transmits the input signals with different voltages and currents; according to the historical matching results and the current and voltage of the current input signals, the input interface 16 matching the current and voltage of the current input signals is determined. Since the historical matching results are the matching results with lower delays, the input interface 16 with a lower delay in the historical matching results can be selected for transmission, which can reduce the delay; or by detecting the signal delay, according to the relationship between the signal delay and the current and voltage and the priority indexes of each interface, a suitable input interface 16 is selected. Since the priority index reflects the delay situation when the input interface 16 transmits the input signals with different voltages and currents, the input interface 16 corresponding to the priority index with the lowest delay situation can be selected for transmission, thereby reducing the signal delay.

[0078] Optionally, the matching unit 14 is configured to, when there is a matching result corresponding to the current input signal in the historical matching results, determine the input interface 16 matching the current input signal according to the historical matching results; when there is no matching result corresponding to the current input signal in the historical matching results, determine the input interface 16 matching the current input signal according to the priority index of each input interface 16.

[0079] Specifically, the matching unit 14 first queries the matching library to find out whether there is a historical record with the same voltage and current values as the current input signal. If there is a historical matching result corresponding to the current input signal in the matching library 15, the matching unit 14 will determine the input interface 16 matching the current input signal according to this historical matching result, and the matching unit 14 will transmit the current input signal to the matching input interface 16. If there is no historical matching result corresponding to the current input signal in the matching library 15, the matching unit 14 will determine the matching input interface 16 according to the priority index of each input interface 16, and the matching unit 14 will select an input interface 16 with the highest priority and transmit the current input signal to this input interface 16.

[0080] Optionally, the delay detection module 30 is used for:

[0081] Determine the current relationship formula between the input signal current and the signal delay, and the voltage relationship formula between the input signal voltage and the signal delay according to the signal delay when the input signals with different voltages and currents are transmitted through each input interface 16;

[0082] Determine the mean square error of the current relationship formula and the mean square error of the voltage relationship formula;

[0083] Determine the priority index according to the mean square error of the current relationship formula, the mean square error of the voltage relationship formula, the number of current data groups formed by pairing the current and signal delay used to determine the current relationship formula, the number of voltage data groups formed by pairing the voltage and signal delay used to determine the voltage relationship formula, the current in each current data group, the signal delay in each current data group, the voltage in each voltage data group, the signal delay in each voltage data group, the maximum current in all current data groups, the minimum current in all current data groups, the maximum voltage in all voltage data groups, and the minimum voltage in all voltage data groups.

[0084] Among them, the mean square error is a statistic used to measure the degree of difference between the model prediction value and the actual observed value. In the embodiments of the present invention, the mean square error is used to evaluate the accuracy of the current relationship formula and the voltage relationship formula. The mean square error of the current relationship formula: It is calculated by comparing the difference between the current delay predicted by the current relationship formula and the actually observed current delay. Exemplarily, for each current data group formed by pairing the current and the signal delay, calculate the square of the difference between the predicted delay and the actual delay, then add up all these squared differences and divide by the number of data groups, and the result obtained is the mean square error of the current relationship formula. The smaller the mean square error, the higher the prediction accuracy of the current relationship formula and the better the fitting effect of the model. The mean square error of the voltage relationship formula: It is calculated by comparing the difference between the voltage delay predicted by the voltage relationship formula and the actually observed voltage delay. Exemplarily, for each voltage data group formed by pairing the voltage and the signal delay, calculate the square of the difference between the predicted delay and the actual delay, then add up all these squared differences and divide by the number of data groups, and the result obtained is the mean square error of the voltage relationship formula. The smaller the mean square error, the higher the prediction accuracy of the voltage relationship formula and the better the fitting effect of the model.

[0085] Specifically, the delay detection module 30 determines the current relationship between the current and the signal delay, and the voltage relationship between the voltage and the signal delay according to the signal delay when each input interface 16 transmits input signals of different voltages and currents; for each determined relationship, the delay detection module 30 calculates its mean square error; the delay detection module 30 also determines the priority index according to the mean square error of the current relationship, the mean square error of the voltage relationship, the current data group, the voltage data group, the current and signal delay in each current data group, the voltage and signal delay in each voltage data group, the maximum and minimum current values in all current data groups, and the maximum and minimum voltage values in all voltage data groups.

[0086] Optionally, the delay detection module 30 is used to:

[0087] According to different fitting models, the current and signal delay of the input signal are fitted respectively, and the current relationship equations of the current and signal delay corresponding to the different fitting models are determined;

[0088] The voltage and signal delay of the input signal are fitted according to different fitting models, and voltage relationship equations of the voltage and signal delay corresponding to the different fitting models are determined;

[0089] The mean square error of each relation is determined, and the current relation with the minimum mean square error is used as the relation between the current and signal delay of the input signal, and the voltage relation with the minimum mean square error is used as the relation between the voltage and signal delay of the input signal.

[0090] Among them, the fitting model includes but is not limited to a linear model, a nonlinear model, a classification model, an integrated model, etc.; exemplarily, when the input signal is alternating current, the input signal current is its corresponding effective value, and the input signal voltage is its corresponding effective value.

[0091] Specifically, the delay detection module 30 fits the current and signal delay, and the voltage and signal delay of the input signal according to different fitting models, and determines the current relationship between the current and signal delay and the voltage relationship between the voltage and signal delay corresponding to the different fitting models; for each determined relationship, the delay detection module 30 calculates its mean square error; the delay detection module 30 uses the current relationship and voltage relationship with the smallest mean square error as the relationship between the current and signal delay and the relationship between the voltage and signal delay of the input signal, respectively.

[0092] Optionally, the delay detection module 30 is used to:

[0093] Calculate the first priority index of each input interface 16 according to the signal delay of the input signal whose voltage transmitted by each input interface 16 is greater than or equal to the first set voltage value and less than or equal to the second set voltage value, and the current is greater than or equal to the first set current value and less than or equal to the second set current value;

[0094] Calculate the second priority index of each input interface 16 according to the signal delay of the input signal whose voltage transmitted by each input interface 16 is less than the first set voltage value, the signal delay of the input signal whose voltage is greater than the second set voltage value, the signal delay of the input signal whose current is less than the first set current value, and the signal delay of the input signal whose current is greater than the second set current value;

[0095] The matching unit 14 is used for:

[0096] When the voltage of the current input signal is greater than or equal to the first set voltage value and less than or equal to the second set voltage value, and the current is greater than or equal to the first set current value and less than or equal to the second set current value, determine the input interface 16 to which the current input signal matches according to the first priority index of each input interface 16;

[0097] When the signal delay of the input signal whose voltage of the current input signal is less than the first set voltage value, or the signal delay of the input signal whose voltage of the current input signal is greater than the second set voltage value, or the signal delay of the input signal whose current of the current input signal is less than the first set current value, or the current of the current input signal is greater than the second set current value, determine the input interface 16 to which the current input signal matches according to the second priority index of each input interface 16.

[0098] Specifically, the delay detection module 30 calculates the first priority index of each input interface 16 according to the signal delay of the input signal whose voltage transmitted by each input interface 16 is greater than or equal to the first set voltage value and less than or equal to the second set voltage value, and the current is greater than or equal to the first set current value and less than or equal to the second set current value; the delay detection module 30 also calculates the second priority index of each input interface 16 according to the signal delay of the input signal whose voltage transmitted by each input interface 16 is less than the first set voltage value, the signal delay of the input signal whose voltage is greater than the second set voltage value, the signal delay of the input signal whose current is less than the first set current value, and the signal delay of the input signal whose current is greater than the second set current value.

[0099] When the voltage of the current input signal is greater than or equal to the first set voltage value and less than or equal to the second set voltage value, and the current is greater than or equal to the first set current value and less than or equal to the second set current value, the matching unit 14 determines the input interface 16 that the current input signal matches according to the first priority index of each input interface 16; when the signal delay of the input signal with the voltage of the current input signal less than the first set voltage value or the voltage greater than the second set voltage value, and the current of the current input signal is less than the first set current value or the current greater than the second set current value, the matching unit 14 determines the input interface 16 that the current input signal matches according to the second priority index of each input interface 16.

[0100] Figure 2 is the effect diagram of the change of IXD with num1 and num2 provided by the embodiment of the present invention. Figure 3 is the effect diagram of the change of UXD with num1 and num2 provided by the embodiment of the present invention. Refer to Figure 2 and Figure 3 Optionally, the delay detection module 30 is used to calculate the first priority index according to the following formula:

[0101]

[0102] Where YXD is the first priority index, DE = F1(I) is the first relationship between current and signal delay when the current of the input signal is greater than or equal to the first set current value and less than or equal to the second set current value, DE = F2(U) is the second relationship between voltage and signal delay when the voltage of the input signal is greater than or equal to the first set voltage value and less than or equal to the second set voltage value; DE is the signal delay, I is the current of the input signal, U is the voltage of the input signal, K1 is the mean square error corresponding to DE = F1(I), K2 is the mean square error corresponding to DE = F2(U), IXD is the first current priority parameter, UXD is the first voltage priority parameter, num1 is the number of current data groups formed by pairing current and signal delay when determining the first relationship, num2 is the number of voltage data groups formed by pairing voltage and signal delay when determining the second relationship, de a is the signal delay in the a-th current data group, I a is the current value in the a-th current data group, de b is the signal delay in the b-th voltage data group, U b is the voltage value in the b-th voltage data group, I max is the maximum current in all current data groups, I min is the minimum current in all current data groups, U max is the maximum voltage in all voltage data groups, U min is the minimum voltage in all voltage data groups;

[0103] The delay detection module 30 is used to calculate the second priority index according to the following formula:

[0104]

[0105] where NYXD is the second priority index; DE = F3(I) is the third relational expression between current and signal delay when the current of the input signal is greater than the second set current value; DE = F6(I) is the sixth relational expression between current and signal delay when the current of the input signal is less than the first set current value; DE = F4(U) is the fourth relational expression between voltage and signal delay when the voltage of the input signal is greater than the second set voltage value; DE = F5(U) is the fifth relational expression between voltage and signal delay when the voltage of the input signal is less than the first set voltage value; K3 is the mean square error corresponding to DE = F3(I), K4 is the mean square error corresponding to DE = F4(U), K5 is the mean square error corresponding to DE = F5(U), K6 is the mean square error corresponding to DE = F6(I); NIXD is the second current priority parameter, NUXD is the second voltage priority parameter, num3 is the number of current data groups formed by pairing current and signal delay used to determine the sixth relational expression, num4 is the number of voltage data groups formed by pairing current and signal delay used to determine the third relational expression, num5 is the number of voltage data groups formed by pairing voltage and signal delay used to determine the fifth relational expression, num6 is the number of current data groups formed by pairing voltage and signal delay used to determine the fourth relational expression, I e is the rated current, de c is the signal delay in the c-th current data group in the current data group used to determine the sixth relational expression, I c is the current value in the c-th current data group in the current data group used to determine the sixth relational expression, U e is the rated voltage, de d is the signal delay in the d-th voltage data group in the voltage data group used to determine the fifth relational expression, U d is the voltage value in the d-th voltage data group in the voltage data group used to determine the fifth relational expression.

[0106] Optionally, the first set current value is less than the rated current value, and the difference between the rated current and the first set current value is 10% of the rated current;

[0107] The second set current value is greater than the rated current value, and the difference between the second set current value and the rated current is 10% of the rated current;

[0108] The first set voltage value is less than the rated voltage value, and the difference between the rated voltage and the first set voltage value is 10% of the rated voltage;

[0109] The second set voltage value is greater than the rated voltage value, and the difference between the second set voltage value and the rated voltage is 10% of the rated voltage.

[0110] Among them, the first set current value is 90% of the rated current; the first set voltage value is 90% of the rated voltage; the second set current value is 110% of the rated current; the second set voltage value is 110% of the rated voltage.

[0111] In the embodiment of the present invention, when it exceeds or is lower than 110% to 150% of the rated current of the device, it may cause signal distortion and delay. Usually, when it exceeds ±10% of the rated voltage, it may affect the normal operation of the device, thereby increasing the delay. Therefore, by considering the data when the input signal current exceeds or is lower than 10% of the rated current or the data when the input signal voltage exceeds or is lower than 10% of the rated voltage to calculate the interface priority index instead of directly calculating all data uniformly, it is beneficial to improve the characterization ability of the interface priority index for the possible delay. When the input signal current exceeds or is lower than 10% of the rated current (I e ) by more than 10% of the data (that is, the input signal current value > I e *110% or the input signal current value < I e *90%) or the input signal voltage exceeds or is lower than 10% of the rated voltage (U e ) by more than 10% of the data (that is, the input signal voltage value > U e *110% or the input signal voltage value < U e *90%), the calculation method of the second priority index is used for calculation. On the contrary, the calculation method of the first priority index is used for calculation.

[0112] Figure 4 It is a schematic diagram of the module of another relay protection and outlet matrix detection device provided by the embodiment of the present invention. Refer to Figure 4 , optionally, the relay protection and outlet matrix detection device further includes:

[0113] A display module 40 and a timing module 50;

[0114] The timing module 50 is electrically connected to the display module 40, the delay detection module 30, and the processing module 20, and the display module 40 is electrically connected to the processing module 20;

[0115] The display module 40 is used to receive the detection instruction and send the detection instruction to the input module 10, and display the processing result of the processing module 20;

[0116] The input module 10 is used to receive the corresponding input signal from the relay protection device and the outlet matrix after receiving the detection instruction;

[0117] The timing module 50 is used to record the first time when the display module 40 receives the detection instruction, and record the second time when the processing module 20 receives the input signal, and send the first time and the second time to the delay detection module 30;

[0118] The delay detection module 30 is used to determine the signal delay when each input interface 16 transmits input signals with different voltages and currents according to the voltage of the input signal detected by the voltage detection unit 12, the current of the input signal detected by the current detection unit 13, the second time and the first time.

[0119] Among them, the signal delay is the time difference between the detection device receiving the detection command and the processing module 20 receiving the input signal. The time difference of receiving the input signal can be obtained by subtracting the time difference obtained by the timing module 50. The display module 40 is responsible for interacting with the user, receiving the detection instruction input by the user, and sending the detection instruction to the input module 10 to start the detection process. In addition, the display module 40 also displays the processing result of the processing module 20, enabling the user to intuitively understand the detection status and result. The timing module 50 records the first time when the display module 40 receives the detection instruction, and the second time when the processing module 20 receives the input signal, and sends the first time and the second time to the delay detection module 30 for calculating the signal delay. The first time is the time point when the timing module 50 records the display module 40 receiving the detection instruction. The second time is the time point when the timing module 50 records the processing module 20 receiving the input signal.

[0120] Specifically, the user inputs or selects a detection instruction through the display module 40. The display module 40 receives the detection instruction and sends the detection instruction to the input module 10. After receiving the detection instruction, the input module 10 receives the corresponding input signal from the relay protection device and the outlet matrix. The input module 10 internally includes multiple input interfaces 16, and each input interface 16 is responsible for receiving signals from different devices or different parts. The timing module 50 records the first time when the display module 40 receives the detection instruction, and when the processing module 20 receives the input signal transmitted by the input module 10, the timing module 50 records the second time. The delay detection module 30 receives the first time and the second time from the timing module 50, and the voltage of the input signal detected by the voltage detection unit 12 and the current of the input signal detected by the current detection unit 13, and calculates the signal delay when each input interface 16 transmits input signals with different voltages and currents.

[0121] Figure 5 is a schematic diagram of the modules of another relay protection and outlet matrix detection device provided by the embodiments of the present invention. Refer to Figure 5 Optionally, the delay detection module 30 includes a timing information storage unit 31, a delay calculation unit 32, and an interface priority index calculation unit 33;

[0122] The timing information storage unit 31 is used to store the second time and the first time;

[0123] The delay calculation unit 32 is used to determine the signal delay when each input interface 16 transmits input signals with different voltages and currents according to the voltage of the input signal detected by the voltage detection unit 12, the current of the input signal detected by the current detection unit 13, as well as the second time and the first time;

[0124] The interface priority index calculation unit 33 is used to calculate the priority index of each input interface 16 according to the signal delay when each input interface 16 transmits input signals with different voltages and currents.

[0125] Specifically, the user inputs a detection instruction through the display module 40, and this detection instruction is sent to the input module 10. The input module 10 receives the corresponding input signal from the relay protection device and the outlet matrix according to the detection instruction; the timing module 50 records the first time when the display module 40 receives the detection instruction, and records the second time when the processing module 20 receives the input signal; the timing information storage unit 31 stores the first time and the second time, and the voltage detection unit 12 and the current detection unit 13 respectively detect the voltage and current values of the input signal; the delay calculation unit 32 calculates the signal delay of each input interface 16 when transmitting input signals with different voltages and currents according to the detection values provided by the voltage detection unit 12 and the current detection unit 13, as well as the first time and the second time stored in the timing information storage unit 31; the interface priority index calculation unit 33 calculates the priority index of each input interface 16 according to the signal delay data provided by the delay calculation unit 32; the processing module 20 sends the signal delay and the interface priority index to the display module 40; the display module 40 displays the processing result.

[0126] Figure 6 It is a schematic diagram of the modules of another relay protection and outlet matrix detection device provided by an embodiment of the present invention. Refer to Figure 6 , optionally, the processing module 20 includes a data processing unit 21, an algorithm storage unit 22, and a data analysis unit 23;

[0127] The data processing unit 21 is used to process the current input signal;

[0128] The algorithm storage unit 22 is used to store the algorithms for various detections;

[0129] The data analysis unit 23 is used to schedule the algorithms stored in the algorithm storage unit 22 according to the detection instruction, and analyze the current input signal processed by the data processing unit 21;

[0130] The data processing unit 21 includes a filter 211, a signal amplifier 212, and an analog-to-digital converter 213;

[0131] The filter 211 is used to filter the current input signal;

[0132] The signal amplifier 212 is used to amplify the filtered current input signal;

[0133] The analog-to-digital converter 213 is used to convert the format of the filtered and amplified current input signal;

[0134] The input module 10 further includes an indicator light 18 and a protection circuit 19;

[0135] The indicator light 18 is connected to the input interface 16 in a one-to-one correspondence;

[0136] The protection circuit 19 is arranged between the input interface 16 and the internal transmission unit 17. The protection circuit 19 includes a diode 191 or a fuse 192. The protection circuit 19 is used to protect the internal transmission unit 17 from overvoltage or transient current.

[0137] Among them, the data processing unit 21 is used to process the current input signal transmitted to the processing module 20 through the internal transmission unit 17. The algorithm storage unit 22 is used to store the algorithms for performing various detections on the relay protection device and the outlet matrix. The data analysis unit 23 is used to schedule the algorithms stored in the algorithm storage unit 22 according to the detection instruction and analyze various data required by the user according to the current input signal processed by the data processing unit 21. Both the indicator light 18 and the input interface 16 are provided with 16. The indicator light 18 is arranged on the input interface 16 and corresponds to it one by one. The protection circuit 19 is arranged between the signal receiving end of the input interface 16 and the input end of the internal transmission unit 17.

[0138] Specifically, the current input signal enters the detection device through the input interface 16. These input interfaces 16 include multiple channels for receiving signals from different relay protection devices and the output matrix. The indicator lights 18 connected to the input interfaces 16 one by one are used to display the status of each input channel; when the input signal is normally input, the corresponding indicator light 18 will light up; the protection circuit 19 provided between the input interface 16 and the internal transmission unit 17 can absorb or cut off overvoltage or transient current to prevent abnormal signals from damaging the internal transmission unit 17 and subsequent circuits. After receiving the signal from the input module 10, the data processing unit 21 performs filtering processing through the filter 211. The filtered signal is amplified by the signal amplifier 212, and the analog-to-digital converter 213 converts the amplified analog signal into a digital signal. According to the detection instruction, the data analysis unit 23 schedules the corresponding algorithm from the algorithm storage unit 22 to analyze the digital signal from the data processing unit 21. According to the analysis result of the data analysis unit 23, the device may trigger corresponding protection actions or alarm signals. For example, if excessive current or abnormal voltage is detected, the device will immediately cut off the faulty circuit or issue an alarm to prevent equipment damage.

[0139] It should be understood that the various forms of the processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is imposed herein.

[0140] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A relay protection and outlet matrix detection device, characterized in that Comprising: An input module, a processing module, and a delay detection module; The processing module is electrically connected to both the input module and the delay detection module; the input module includes a signal acquisition unit, a voltage detection unit, a current detection unit, a matching unit, a matching library, a plurality of input interfaces, and an internal transmission unit; The delay detection module is configured to obtain the signal delay when each input interface transmits input signals with different voltages and currents, and calculate the priority index of each input interface according to the signal delay when each input interface transmits input signals with different voltages and currents, wherein the priority index reflects the delay situation when the input interface transmits the input signal; The signal acquisition unit is configured to acquire the current input signals of the relay protection device and the outlet matrix; the voltage detection unit is configured to detect the voltage of the current input signal; the current detection unit is configured to detect the current of the current input signal; The matching library is used to store the historical matching results of input signals with different voltages and / or different currents and a plurality of input interfaces; the matching unit is configured to determine the input interface matching the current input signal according to the historical matching results and the current and voltage of the current input signal, or the matching unit is configured to determine the input interface matching the current input signal according to the priority index of each input interface, and transmit the current input signal to the input interface matching it; the input interface is configured to input the current input signal into the internal transmission unit; the internal transmission unit is configured to transmit the current input signal to the processing module; The processing module is configured to process the current input signal transmitted by the internal transmission unit.

2. The relay protection and outlet matrix detection device according to claim 1, wherein: The matching unit is configured to, when there is a matching result corresponding to the current input signal in the historical matching results, determine the input interface matching the current input signal according to the historical matching results; When there is no matching result corresponding to the current input signal in the historical matching results, determine the input interface matching the current input signal according to the priority index of each input interface.

3. The relay protection and outlet matrix detection device according to claim 1, wherein: The delay detection module is configured to: Determine the current relationship formula between the current of the input signal and the signal delay, and the voltage relationship formula between the voltage of the input signal and the signal delay according to the signal delay when each input interface transmits input signals with different voltages and currents; Determine the mean square error of the current relationship formula and determine the mean square error of the voltage relationship formula; Determine the priority index based on the mean square error of the current relationship, the mean square error of the voltage relationship, the number of current data groups formed by pairing the current and signal delay used when determining the current relationship, the number of voltage data groups formed by pairing the voltage and signal delay used when determining the voltage relationship, the current in each current data group, the signal delay in each current data group, the voltage in each voltage data group, the signal delay in each voltage data group, the maximum current value in all current data groups, the minimum current value in all current data groups, the maximum voltage value in all voltage data groups, and the minimum voltage value in all voltage data groups.

4. The relay protection and outlet matrix detection device according to claim 3, characterized in that: The delay detection module is used for: Fitting the current and signal delay of the input signal according to different fitting models respectively to determine the current relationship between the current and signal delay corresponding to different fitting models; Fitting the voltage and signal delay of the input signal according to different fitting models respectively to determine the voltage relationship between the voltage and signal delay corresponding to different fitting models; Determine the mean square error of each relationship, use the current relationship with the minimum mean square error as the relationship between the current and signal delay of the input signal, and use the voltage relationship with the minimum mean square error as the relationship between the voltage and signal delay of the input signal.

5. The relay protection and outlet matrix detection device according to claim 1, characterized in that: The delay detection module is used for: Calculate the first priority index of each input interface according to the signal delay of the input signal when the voltage transmitted by each input interface is greater than or equal to the first set voltage value and less than or equal to the second set voltage value, and the current is greater than or equal to the first set current value and less than or equal to the second set current value; Calculate the second priority index of each input interface according to the signal delay of the input signal when the voltage transmitted by each input interface is less than the first set voltage value, the signal delay of the input signal when the voltage is greater than the second set voltage value, the signal delay of the input signal when the current is less than the first set current value, and the signal delay of the input signal when the current is greater than the second set current value; The matching unit is used for: When the voltage of the current input signal is greater than or equal to the first set voltage value and less than or equal to the second set voltage value, and the current is greater than or equal to the first set current value and less than or equal to the second set current value, determine the input interface matched by the current input signal according to the first priority index of each input interface; When the signal delay of the input signal with the voltage of the current input signal less than the first set voltage value, or the signal delay of the input signal with the voltage of the current input signal greater than the second set voltage value, or the signal delay of the input signal with the current of the current input signal less than the first set current value, or the current of the current input signal is greater than the second set current value, determine the input interface matched by the current input signal according to the second priority index of each input interface.

6. The relay protection and outlet matrix detection device according to claim 5, characterized in that: The delay detection module is used to calculate the first priority index according to the following formula: Among them, YXD is the first priority index, DE = F1(I) is the first relationship between current and signal delay when the current of the input signal is greater than or equal to the first set current value and less than or equal to the second set current value, and DE = F2(U) is the second relationship between voltage and signal delay when the voltage of the input signal is greater than or equal to the first set voltage value and less than or equal to the second set voltage value; DE is the signal delay, I is the current of the input signal, U is the voltage of the input signal, K1 is the mean square error corresponding to DE = F1(I), K2 is the mean square error corresponding to DE = F2(U), IXD is the first current priority parameter, UXD is the first voltage priority parameter, num1 is the number of current data groups formed by pairing the current and signal delay used to determine the first relationship, num2 is the number of voltage data groups formed by pairing the voltage and signal delay used to determine the second relationship, de a is the signal delay in the a-th current data group, I a is the current value in the a-th current data group, de b is the signal delay in the b-th voltage data group, U b is the voltage value in the b-th voltage data group, I max is the maximum current value in all current data groups, I min is the minimum current value in all current data groups, U max is the maximum voltage value in all voltage data groups, U min is the minimum voltage value in all voltage data groups; The delay detection module is used to calculate the second priority index according to the following formula: Among them, NYXD is the second priority index; DE = F3(I) is the third relationship formula between current and signal delay when the current of the input signal is greater than the second set current value; DE = F6(I) is the sixth relationship formula between current and signal delay when the current of the input signal is less than the first set current value; DE = F4(U) is the fourth relationship formula between voltage and signal delay when the voltage of the input signal is greater than the second set voltage value; DE = F5(U) is the fifth relationship formula between voltage and signal delay when the voltage of the input signal is less than the first set voltage value; K3 is the mean square error corresponding to DE = F3(I), K4 is the mean square error corresponding to DE = F4(U), K5 is the mean square error corresponding to DE = F5(U), and K6 is the mean square error corresponding to DE = F6(I); NIXD is the second current priority parameter, NUXD is the second voltage priority parameter, num3 is the number of current data groups composed of pairs of current and signal delay used to determine the sixth relationship formula, num4 is the number of voltage data groups composed of pairs of current and signal delay used to determine the third relationship formula, num5 is the number of voltage data groups composed of pairs of voltage and signal delay used to determine the fifth relationship formula, num6 is the number of current data groups composed of pairs of voltage and signal delay used to determine the fourth relationship formula, I e is the rated current, de c is the signal delay in the c-th current data group among the current data groups used to determine the sixth relationship formula, I c is the current value in the c-th current data group among the current data groups used to determine the sixth relationship formula, U e is the rated voltage, de d is the signal delay in the d-th voltage data group among the voltage data groups used to determine the fifth relationship formula, U d is the voltage value in the d-th voltage data group among the voltage data groups used to determine the fifth relationship formula.

7. The relay protection and outlet matrix detection device according to claim 1, characterized in that: The first set current value is less than the rated current value, and the difference between the rated current and the first set current value is 10% of the rated current; The second set current value is greater than the rated current value, and the difference between the second set current value and the rated current is 10% of the rated current; The first set voltage value is less than the rated voltage value, and the difference between the rated voltage and the first set voltage value is 10% of the rated voltage; The second set voltage value is greater than the rated voltage value, and the difference between the second set voltage value and the rated voltage is 10% of the rated voltage.

8. The relay protection and trip matrix detection device according to claim 1, characterized in that, It further includes: A display module and a timing module; The timing module is electrically connected to the display module, the delay detection module, and the processing module, and the display module is electrically connected to the processing module; The display module is used to receive a detection instruction and send the detection instruction to the input module, and display the processing result of the processing module; The input module is used to receive the corresponding input signal from the relay protection device and the outlet matrix after receiving the detection instruction; The timing module is used to record the first time when the display module receives the detection instruction, and record the second time when the processing module receives the input signal, and send the first time and the second time to the delay detection module; The delay detection module is used to determine the signal delay when each input interface transmits input signals with different voltages and currents according to the voltage of the input signal detected by the voltage detection unit, the current of the input signal detected by the current detection unit, and the second time and the first time.

9. The relay protection and outlet matrix detection device according to claim 8, characterized in that: The delay detection module includes a timing information storage unit, a delay calculation unit, and an interface priority index calculation unit; The timing information storage unit is used to store the second time and the first time; The delay calculation unit is used to determine the signal delay when each input interface transmits input signals with different voltages and currents according to the voltage of the input signal detected by the voltage detection unit, the current of the input signal detected by the current detection unit, and the second time and the first time; The interface priority index calculation unit is used to calculate the priority index of each input interface according to the signal delay when each input interface transmits input signals with different voltages and currents.

10. The relay protection and outlet matrix detection device according to claim 1, characterized in that: The processing module includes a data processing unit, an algorithm storage unit, and a data analysis unit; The data processing unit is used to process the current input signal; The algorithm storage unit is used to store the algorithms for various detections; The data analysis unit is used to schedule the algorithms stored in the algorithm storage unit according to the detection instruction, and analyze the current input signal processed by the data processing unit; The data processing unit includes a filter, a signal amplifier, and an analog-to-digital converter; The filter is used to filter the current input signal; The signal amplifier is used to amplify the filtered current input signal; The analog-to-digital converter is used to convert the format of the filtered and amplified current input signal; The input module further includes an indicator light and a protection circuit; The indicator light is connected in one-to-one correspondence with the input interface; The protection circuit is arranged between the input interface and the internal transmission unit. The protection circuit includes a diode or a fuse, and the protection circuit is used to protect the internal transmission unit from overvoltage or transient current.

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