A relay protection and outlet matrix detection device

Abstract

The embodiment of the application discloses a kind of relay protection and export matrix detection device, comprising: delay detection module obtains the signal delay when each input interface transmits different input signal and calculates priority index;Signal acquisition unit collects input signal;Voltage and current detection unit detects the voltage and current of signal;Matching library saves the historical matching result of different input signal and input interface;Matching unit determines matching interface according to matching result, or, determine matching interface according to priority index, and transmit signal to the input interface matched therewith;Input interface inputs signal into internal transmission unit;Internal transmission unit transmits signal to processing module;Processing module processes signal.According to historical matching result, select appropriate input interface, or by detecting signal delay, according to the relationship between signal delay and current and voltage and the priority index of each interface, select appropriate input interface, so as to reduce signal delay.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of power systems, and in particular to a relay protection and output matrix detection device. Background Technology

[0002] In power systems, the output matrix typically refers to the status control and monitoring matrix of various control devices such as circuit breakers and switches. These devices are responsible for functions such as current inflow and outflow, line switching, and load regulation in the power system. Output matrix detection is mainly used to monitor the status of these devices, ensure their normal operation, and perform protection or control operations when necessary.

[0003] Currently, the detection of relay protection output matrix mainly relies on relay protection testers, but these can only measure the trip backup contacts and cannot comprehensively measure the output matrix. This problem is particularly prominent when there are more complex output matrix situations in 220kV conventional substations, such as when verifying 220kV line protection, main transformer protection, and bus differential protection. In addition, existing output matrix detection equipment generally suffers from high latency. Summary of the Invention

[0004] This invention provides a relay protection and output matrix detection device, which selects a suitable input interface based on historical matching results, or selects a suitable input interface by detecting signal delay and based on the relationship between signal delay and current and voltage, as well as the priority index of each interface, thereby reducing signal delay.

[0005] According to one aspect of the present invention, a relay protection and output matrix detection device is provided, comprising:

[0006] Input module, processing module, and 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, multiple input interfaces, and an internal transmission unit;

[0008] The delay detection module is used to acquire the signal delay when each input interface transmits input signals with different voltages and currents, and to calculate the priority index of each input interface based on the signal delay when each input interface transmits input signals with different voltages and currents. The priority index reflects the delay when the input interface transmits input signals.

[0009] The signal acquisition unit is used to acquire the current input signals of the relay protection equipment and the output matrix; the voltage detection unit is used to detect the voltage of the current input signal; the current detection unit is used 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 with multiple input interfaces; the matching unit is used to determine the input interface that matches the current input signal based on 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 based on the priority index of each input interface, and transmit the current input signal to the matching input interface; 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, the matching unit is used to determine the input interface that matches the current input signal based on the historical matching results when there is a matching result corresponding to the current input signal in the historical matching results; and to determine the input interface that matches the current input signal based on the priority index of each input interface when there is no matching result corresponding to the current input signal in the historical matching results.

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

[0013] The relationship between the current of the input signal and the signal delay, and the relationship between the voltage of the input signal and the signal delay, are determined based on the signal delay when the input signal with different voltage and current is transmitted through each input interface.

[0014] Determine the mean square error of the current relationship equation, and determine the mean square error of the voltage relationship equation;

[0015] Priority indices are determined based on the mean square error of the current relationship, the mean square error of the voltage relationship, the number of current data sets consisting of pairs of current and signal delays used to determine the current relationship, the number of voltage data sets consisting of pairs of voltage and signal delays used to determine the voltage relationship, the current in each current data set, the signal delay in each current data set, the voltage in each voltage data set, the signal delay in each voltage data set, the maximum current value in all current data sets, the minimum current value in all current data sets, the maximum voltage value in all voltage data sets, and the minimum voltage value in all voltage data sets.

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

[0017] The current and signal delay of the input signal are fitted using different fitting models to determine the current-signal-delay relationship corresponding to different fitting models.

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

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

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

[0021] The first priority index of each input interface is calculated based on the signal delay of the input signal transmitted by each input interface, where the voltage 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.

[0022] Based on the signal delay of input signals whose voltage is less than the first set voltage value and the signal delay of input signals whose voltage is greater than the second set voltage value, the signal delay of input signals whose current is less than the first set current value and the signal delay of input signals 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, the input interface matching the current input signal is determined according to the first priority index of each input interface.

[0025] When the voltage of the current input signal is less than the first set voltage value, or the voltage of the current input signal is greater than the second set voltage value, or the 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, the input interface matching the current input signal is determined 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] Where YXD is the first priority index, DE=F1(I) is the first relationship between current and signal delay when the input signal current 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 input signal voltage 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 input signal current, U is the input signal voltage, 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 composed of pairs of current and signal delay used when determining the first relationship, num2 is the number of voltage data groups composed of pairs of voltage and signal delay used when determining the second relationship, de a For the signal delay in the a-th current data group, I a For the current value in the a-th current data set, de b For the signal delay in the b-th voltage data group, U b For the voltage value in the b-th voltage data set, I max I is the maximum current value in all current data sets. min U is the minimum current value among all current data sets. max U is the maximum voltage value in all voltage data sets. min The minimum voltage value among all voltage data sets;

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

[0030]

[0031] Wherein, NYXD is the second priority index; DE = F3(I) is the third relationship between current and signal delay when the input signal current is greater than the second set current value; DE = F6(I) is the sixth relationship between current and signal delay when the input signal current is less than the first set current value; DE = F4(U) is the fourth relationship between voltage and signal delay when the input signal voltage is greater than the second set voltage value; DE = F5(U) is the fifth relationship between voltage and signal delay when the input signal voltage is less than the first set voltage value; K3 is the mean square error corresponding to DE = F3(I), and 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 composed of current and signal delay pairs used to determine the sixth relation, num4 is the number of voltage data groups composed of current and signal delay pairs used to determine the third relation, num5 is the number of voltage data groups composed of voltage and signal delay pairs used to determine the fifth relation, num6 is the number of current data groups composed of voltage and signal delay pairs used to determine the fourth relation, I e For the rated current, de c To determine the signal delay in the c-th current data group used in the sixth relation, I c To determine the current value in the c-th current data set used in the sixth relation, U e For rated voltage, de d To determine the signal delay in the d-th voltage data group used in the fifth relation, U d The voltage value in the d-th voltage data set is used to determine the fifth relation.

[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 output matrix detection device also includes:

[0037] Display module and timing module;

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

[0039] The display module is used to receive detection commands and send them to the input module, as well as to display the processing results of the processing module;

[0040] The input module is used to receive corresponding input signals from the relay protection equipment and the output matrix after receiving the detection command;

[0041] The timing module is used to record the first time when the display module receives the detection command and the second time when the processing module receives the input signal, and sends 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 based on 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 and first times.

[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 based on 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 and first times.

[0046] The interface priority index calculation unit is used to calculate the priority index of each input interface based on 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 each detection step;

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

[0051] The data processing unit includes filters, signal amplifiers, and analog-to-digital converters;

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

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

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

[0055] The input module also includes indicator lights and protection circuitry;

[0056] Indicator lights are connected to input interfaces in a one-to-one correspondence.

[0057] The protection circuit is located between the input interface and the internal transmission unit. The protection circuit includes diodes or fuses and is used to protect the internal transmission unit from overvoltage or transient current.

[0058] The relay protection and output matrix detection device provided in this embodiment of the invention includes an input module, a processing module, and a delay detection module. A signal acquisition unit acquires the current input signals of the relay protection device and the output matrix. A voltage and current detection unit detects the voltage and current of the current input signals. A matching library stores historical matching results between input signals with different voltages and / or different currents and multiple input interfaces. The delay detection module can 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 based on the signal delay when transmitting input signals with different voltages and currents. Based on 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 those with lower delays, the input interface with the lowest delay in the historical matching results can be selected for transmission, thereby reducing delay. Alternatively, by detecting the signal delay, a suitable input interface can be selected based on the relationship between signal delay and current and voltage, as well as the priority index of each interface. Since the priority index reflects the delay of the input interface when transmitting input signals with different voltages and currents, the input interface with the lowest priority index can be selected for transmission, thereby reducing signal delay.

[0059] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0060] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0061] Figure 1 This is a schematic diagram of a relay protection and output matrix detection device provided in an embodiment of the present invention.

[0062] Figure 2 This is a diagram showing the effect of IXD changing with num1 and num2 according to an embodiment of the present invention.

[0063] Figure 3 This is a diagram showing the effect of UXD changing with num1 and num2, provided in an embodiment of the present invention.

[0064] Figure 4 This is a schematic diagram of another relay protection and output matrix detection device provided in an embodiment of the present invention.

[0065] Figure 5 This is a schematic diagram of another relay protection and output matrix detection device provided in an embodiment of the present invention.

[0066] Figure 6 This is a schematic diagram of another relay protection and output matrix detection device provided in an embodiment of the present invention. Detailed Implementation

[0067] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0068] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0069] This invention provides a relay protection and output matrix detection device. Figure 1 This is a schematic diagram of a relay protection and output matrix detection device provided in an embodiment of the present invention. (Reference) Figure 1 The relay protection and output matrix detection device includes:

[0070] Input module 10, processing module 20 and 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, multiple input interfaces 16, and an internal transmission unit 17;

[0072] The delay detection module 30 is used to acquire the signal delay when each input interface 16 transmits input signals with different voltages and currents, and to calculate the priority index of each input interface 16 based on the signal delay when each input interface 16 transmits input signals with different voltages and currents. The priority index reflects the delay when the input interface 16 transmits input signals.

[0073] The signal acquisition unit 11 is used to acquire the current input signal of the relay protection device and the output matrix; the voltage detection unit 12 is used to detect the voltage of the current input signal; the current detection unit 13 is used to detect the current of the current input signal; the matching library 15 is used to store the historical matching results of input signals with different voltages and / or different currents with multiple input interfaces 16; the matching unit 14 is used to determine the input interface 16 that matches the current input signal based on 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 based on 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] The output matrix consists of the output terminals of multiple relay protection devices being monitored. The input module 10 receives input signals from the relay protection devices and the output matrix, which may include electrical parameters such as voltage and current. Historical matching results stored in the matching library represent those with lower delays. The processing module 20 processes and analyzes the input signals transmitted by the input module 10. The delay detection module 30 acquires the signal delay of each input interface 16 when transmitting input signals of different voltages and currents, and calculates the priority index of each input interface 16 based on the signal delay. The priority index characterizes the delay of each input interface 16 when transmitting input signals of different voltages and currents; a higher priority index corresponds to a lower delay for the corresponding input interface 16.

[0076] Specifically, the signal acquisition unit 11 acquires the current input signal of the relay protection device and the output matrix; the voltage detection unit 12 and the current detection unit 13 detect the voltage and current values ​​of the current input signal, respectively; 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, which stores the historical matching results of input signals with different voltages and / or different currents with multiple input interfaces 16; the matching unit 14 determines the input interface 16 that best matches the current input signal based on the historical matching results and the voltage and current values ​​of the current input signal, or the matching unit 14 determines the input interface 16 that best matches the current input signal based on the priority index of each input interface 16 provided by the delay detection module 30. Based on the determined input interface 16, the matching unit 14 transmits the current input signal to the determined input interface 16. For example, if the input signal voltage and current corresponding to certain historical data in the matching library 15 are the same as the current input signal voltage and current, then by obtaining the input interface 16 with the lowest latency in that set of historical data, the matching result can be obtained. Transmitting the input signal through this input interface 16 can keep the detection process low-latency; this allows for the selection of a suitable interface for transmission before the next detection, thereby reducing latency and improving detection accuracy. If the input signal voltage and current cannot be measured or a corresponding matching result cannot be found, the matching unit 14 will prioritize the interface with the highest priority index according to the priority index of each input interface 16 and transmit the current input signal to that interface, which can reduce signal latency. After receiving the current input signal from the matching unit 14, the input interface 16 inputs the current input signal to 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 begins to process the input signal.

[0077] The relay protection and output matrix detection device provided in this embodiment of the 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 output 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 input signals with different voltages and / or different currents with multiple input interfaces 16; the delay detection module 30 can obtain the signal delay when each input interface 16 transmits input signals with different voltages and currents, and calculate the priority index of each input interface 16 based on the signal delay when each input interface 16 transmits input signals with different voltages and currents. Based on historical matching results and the current and voltage of the current input signal, an input interface 16 that matches the current and voltage of the current input signal is determined. Since the historical matching results are those with lower delays, the input interface 16 with the lower delay in the historical matching results can be selected for transmission, thereby reducing latency. Alternatively, by detecting signal delay, a suitable input interface 16 can be selected based on the relationship between signal delay and current and voltage, as well as the priority index of each interface. Since the priority index reflects the delay of the input interface 16 when transmitting input signals with different voltages and currents, the input interface 16 with the lowest delay priority index can be selected for transmission, thereby reducing signal delay.

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

[0079] Specifically, matching unit 14 first queries the matching library to check if there are any historical records with the same voltage and current values ​​as the current input signal. If a historical matching result corresponding to the current input signal exists in the matching library 15, matching unit 14 will determine the input interface 16 that matches the current input signal based on this historical matching result, and matching unit 14 will transmit the current input signal to the matching input interface 16. If no historical matching result corresponding to the current input signal exists in the matching library 15, matching unit 14 will determine the matching input interface 16 based on the priority index of each input interface 16, and matching unit 14 will select the input interface 16 with the highest priority and transmit the current input signal to that input interface 16.

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

[0081] The relationship between the current of the input signal and the signal delay, and the relationship between the voltage of the input signal and the signal delay are determined based on the signal delay when each input interface 16 transmits input signals with different voltages and currents.

[0082] Determine the mean square error of the current relationship equation, and determine the mean square error of the voltage relationship equation;

[0083] Priority indices are determined based on the mean square error of the current relationship, the mean square error of the voltage relationship, the number of current data sets consisting of pairs of current and signal delays used to determine the current relationship, the number of voltage data sets consisting of pairs of voltage and signal delays used to determine the voltage relationship, the current in each current data set, the signal delay in each current data set, the voltage in each voltage data set, the signal delay in each voltage data set, the maximum current value in all current data sets, the minimum current value in all current data sets, the maximum voltage value in all voltage data sets, and the minimum voltage value in all voltage data sets.

[0084] The mean squared error (MSE) is a statistic used to measure the degree of difference between model predictions and actual observations. In this embodiment of the invention, the MSE is used to evaluate the accuracy of current and voltage relationships. The MSE of the current relationship is calculated by comparing the difference between the predicted current delay and the actual observed current delay. For example, for each pair of current and signal delay data sets, the square of the difference between the predicted delay and the actual delay is calculated. Then, all these squared differences are summed and divided by the number of data sets to obtain the MSE of the current relationship. The smaller the MSE, the higher the prediction accuracy of the current relationship and the better the model fit. The MSE of the voltage relationship is calculated by comparing the difference between the predicted voltage delay and the actual observed voltage delay. For example, for each pair of voltage and signal delay data sets, the square of the difference between the predicted delay and the actual delay is calculated. Then, all these squared differences are summed and divided by the number of data sets to obtain the MSE of the voltage relationship. The smaller the mean square error, the higher the accuracy of the voltage relationship prediction and the better the model fit.

[0085] Specifically, the delay detection module 30 determines the current relationship between current and signal delay, and the voltage relationship between voltage and signal delay, respectively, based on the signal delay when each input interface 16 transmits input signals with 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 priority indicators based on 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 for:

[0087] The current and signal delay of the input signal are fitted using different fitting models to determine the current-signal-delay relationship corresponding to different fitting models.

[0088] The voltage and signal delay of the input signal are fitted using different fitting models to determine the voltage-signal delay relationship corresponding to different fitting models.

[0089] Determine the mean square error of each relationship, and take the current relationship with the smallest mean square error as the relationship between the input signal current and the signal delay, and take the voltage relationship with the smallest mean square error as the relationship between the input signal voltage and the signal delay.

[0090] The fitting model includes, but is not limited to, linear models, nonlinear models, classification models, ensemble models, etc. For example, 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 and voltage relationship of the signal delay corresponding to 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 current relationship and voltage relationship of the input signal, respectively.

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

[0093] Based on the signal delay of the input signal transmitted by each input interface 16, where the voltage is greater than or equal to a first set voltage value and less than or equal to a second set voltage value, and the current is greater than or equal to a first set current value and less than or equal to a second set current value, a first priority index for each input interface 16 is calculated.

[0094] Based on the signal delay of the input signal whose voltage is less than the first set voltage value and 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, a second priority index is calculated for each input interface 16.

[0095] 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, the input interface 16 that matches the current input signal is determined according to the first priority index of each input interface 16.

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

[0098] Specifically, the delay detection module 30 calculates a first priority index for each input interface 16 based on the signal delay of the input signal transmitted by each input interface 16, where the voltage is greater than or equal to a first set voltage value and less than or equal to a second set voltage value, and the current is greater than or equal to a first set current value and less than or equal to a second set current value. The delay detection module 30 also calculates a second priority index for each input interface 16 based on the signal delay of the input signal transmitted by each input interface 16, where the voltage is less than the first set voltage value and the voltage is greater than the second set voltage value, and the current is less than the first set current value and the 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 to be matched for the current input signal according to the first priority index of each input interface 16; when the voltage of the current input signal is less than the first set voltage value or the voltage is 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 is greater than the second set current value, the matching unit 14 determines the input interface 16 to be matched for the current input signal according to the second priority index of each input interface 16.

[0100] Figure 2 This is a diagram showing the effect of IXD changing with num1 and num2 according to an embodiment of the present invention. Figure 3 This is a diagram illustrating the effect of UXD changing with num1 and num2 according to an embodiment of the present invention. (Reference) 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 input signal current 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 input signal voltage 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 input signal current, U is the input signal voltage, 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 composed of pairs of current and signal delay used when determining the first relationship, num2 is the number of voltage data groups composed of pairs of voltage and signal delay used when determining the second relationship, de a For the signal delay in the a-th current data group, I a For the current value in the a-th current data set, de b For the signal delay in the b-th voltage data group, U b For the voltage value in the b-th voltage data set, I max I is the maximum current value in all current data sets. min U is the minimum current value among all current data sets. max U is the maximum voltage value in all voltage data sets. min The minimum voltage value among all voltage data sets;

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

[0104]

[0105] Wherein, NYXD is the second priority index; DE = F3(I) is the third relationship between current and signal delay when the input signal current is greater than the second set current value; DE = F6(I) is the sixth relationship between current and signal delay when the input signal current is less than the first set current value; DE = F4(U) is the fourth relationship between voltage and signal delay when the input signal voltage is greater than the second set voltage value; DE = F5(U) is the fifth relationship between voltage and signal delay when the input signal voltage is less than the first set voltage value; K3 is the mean square error corresponding to DE = F3(I), and 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 composed of current and signal delay pairs used to determine the sixth relation, num4 is the number of voltage data groups composed of current and signal delay pairs used to determine the third relation, num5 is the number of voltage data groups composed of voltage and signal delay pairs used to determine the fifth relation, num6 is the number of current data groups composed of voltage and signal delay pairs used to determine the fourth relation, I e For the rated current, de c To determine the signal delay in the c-th current data group used in the sixth relation, I c To determine the current value in the c-th current data set used in the sixth relation, U e For rated voltage, de d To determine the signal delay in the d-th voltage data group used in the fifth relation, U d The voltage value in the d-th voltage data set is used to determine the fifth relation.

[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] 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; and the second set voltage value is 110% of the rated voltage.

[0111] In this invention, currents exceeding or falling below 110% to 150% of the device's rated current may cause signal distortion and delay. Generally, exceeding the rated voltage by ±10% may affect the normal operation of the device, thereby increasing delay. Therefore, calculating the interface priority index by considering data where the input signal current exceeds or falls below the rated current by more than 10% or the input signal voltage exceeds or falls below the rated voltage by more than 10%, rather than directly calculating all data uniformly, is beneficial for improving the interface priority index's ability to characterize potential delays. When the input signal current exceeds or falls below the rated current (I... e More than 10% of the data (i.e., input signal current value > I) e *110% or input signal current value e *90%) or the input signal voltage exceeds or falls below the rated voltage (U e More than 10% of the data (i.e., input signal voltage value > U) e *110% or input signal voltage value e When the percentage is 90%, the calculation method of the second priority index is used; otherwise, the calculation method of the first priority index is used.

[0112] Figure 4 This is a schematic diagram of another relay protection and output matrix detection device provided in an embodiment of the present invention. (Reference) Figure 4 Optionally, the relay protection and output matrix detection device also includes:

[0113] Display module 40 and 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. The display module 40 is electrically connected to the processing module 20.

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

[0116] Input module 10 is used to receive corresponding input signals from relay protection equipment and output matrix after receiving detection command;

[0117] ​​The timing module 50 is used to record the first time when the display module 40 receives the detection command 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;

[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 based on 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, and the second and first times.

[0119] The signal delay is the time difference between the detection device receiving the detection command and the processing module 20 receiving the input signal. This time difference can be obtained by subtracting the time difference acquired by the timing module 50. The display module 40 interacts with the user, receiving the user-inputted detection command and sending it to the input module 10 to initiate the detection process. Furthermore, the display module 40 displays the processing results from the processing module 20, allowing the user to intuitively understand the detection status and results. The timing module 50 records the first time the display module 40 receives the detection command and the second time the processing module 20 receives the input signal, and sends both times to the delay detection module 30 for calculating the signal delay. The first time is the time recorded by the timing module 50 when the display module 40 receives the detection command. The second time is the time recorded by the timing module 50 when the processing module 20 receives the input signal.

[0120] Specifically, the user inputs or selects a detection command through the display module 40. The display module 40 receives the detection command and sends it to the input module 10. After receiving the detection command, the input module 10 receives the corresponding input signal from the relay protection device and the output matrix. The input module 10 contains multiple input interfaces 16, each responsible for receiving signals from different devices or different parts. The timing module 50 records a first time when the display module 40 receives the detection command, and records a second time when the processing module 20 receives the input signal transmitted by the input module 10. The delay detection module 30 receives the first and second times from the timing module 50, as well as 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 of each input interface 16 when transmitting different voltage and current signals.

[0121] Figure 5 This is a schematic diagram of another relay protection and output matrix detection device provided in an embodiment of the present invention. (Reference) 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 based on 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, and the second and first times.

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

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

[0126] Figure 6 This is a schematic diagram of another relay protection and output matrix detection device provided in an embodiment of the present invention. (Reference) 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] Data processing unit 21 is used to process the current input signal;

[0128] Algorithm storage unit 22 is used to store the algorithms for each detection;

[0129] The data analysis unit 23 is used to schedule the algorithm stored in the algorithm storage unit 22 according to the detection instruction, and to 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] Filter 211 is used to filter the current input signal;

[0132] 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 current input signal after filtering and amplification;

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

[0135] Indicator lights 18 are connected one-to-one with input interfaces 16;

[0136] The protection circuit 19 is located 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] The data processing unit 21 processes the current input signal transmitted to the processing module 20 via the internal transmission unit 17. The algorithm storage unit 22 stores algorithms for various detections of the relay protection equipment and the output matrix. The data analysis unit 23 schedules the algorithms stored in the algorithm storage unit 22 according to the detection instructions and analyzes various data required by the user based on the current input signal processed by the data processing unit 21. Sixteen indicator lights 18 are provided on both the indicator lights 18 and the input interface 16, with each indicator light 18 corresponding to one of the input interfaces 16. The protection circuit 19 is located 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 input interfaces 16. These input interfaces 16 include multiple channels for receiving signals from different relay protection devices and the output matrix. Indicator lights 18, connected one-to-one with the input interfaces 16, are used to display the status of each input channel; when the input signal is input normally, the corresponding indicator light 18 will light up; the protection circuit 19, located between the input interfaces 16 and the internal transmission unit 17, can absorb or cut off overvoltages or transient currents 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 filters it 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 command, 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. Based on the analysis results 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 fault circuit or issue an alarm to prevent equipment damage.

[0139] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0140] The specific embodiments described above do not constitute a limitation on the scope of protection of this 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 principles of this invention should be included within the scope of protection of this invention.

Claims

1. A relay protection and output matrix detection device, characterized in that, include: Input module, processing module, and 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, multiple input interfaces, and an internal transmission unit; The delay detection module is used to acquire the signal delay when each input interface transmits input signals with different voltages and currents, and to calculate the priority index of each input interface based on the signal delay when each input interface transmits input signals with different voltages and currents. The priority index reflects the delay when the input interface transmits input signals. The signal acquisition unit is used to acquire the current input signal of the relay protection device and the output matrix; the voltage detection unit is used to detect the voltage of the current input signal; the current detection unit is used to detect the current of the current input signal. The matching library is used to store historical matching results of input signals with different voltages and / or different currents with multiple input interfaces; the matching unit is used to determine the input interface that matches the current input signal based on 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 based on the priority index of each input interface, and transmit the current input signal to the matching input interface; 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; The processing module is used to process the current input signal transmitted by the internal transmission unit; The delay detection module is used for: The relationship between the current of the input signal and the signal delay, and the relationship between the voltage of the input signal and the signal delay, are determined based on the signal delay when the input signal with different voltage and current is transmitted through each input interface. Determine the mean square error of the current relationship equation, and determine the mean square error of the voltage relationship equation; Priority indices are determined based on the mean square error of the current relationship, the mean square error of the voltage relationship, the number of current data sets consisting of pairs of current and signal delays used to determine the current relationship, the number of voltage data sets consisting of pairs of voltage and signal delays used to determine the voltage relationship, the current in each current data set, the signal delay in each current data set, the voltage in each voltage data set, the signal delay in each voltage data set, the maximum current value in all current data sets, the minimum current value in all current data sets, the maximum voltage value in all voltage data sets, and the minimum voltage value in all voltage data sets.

2. The relay protection and output matrix detection device according to claim 1, characterized in that: The matching unit is used to determine the input interface that matches the current input signal based on the historical matching results when there is a matching result in the historical matching results that corresponds to the current input signal. If no matching result corresponding to the current input signal is found in the historical matching results, the input interface that matches the current input signal is determined according to the priority index of each input interface.

3. The relay protection and output matrix detection device according to claim 1, characterized in that: The delay detection module is used for: The current and signal delay of the input signal are fitted using different fitting models to determine the current-signal-delay relationship corresponding to different fitting models. The voltage and signal delay of the input signal are fitted using different fitting models to determine the voltage-signal delay relationship corresponding to different fitting models. Determine the mean square error of each relationship, and take the current relationship with the smallest mean square error as the relationship between the input signal current and the signal delay, and take the voltage relationship with the smallest mean square error as the relationship between the input signal voltage and the signal delay.

4. The relay protection and output matrix detection device according to claim 1, characterized in that: The delay detection module is used for: The first priority index of each input interface is calculated based on the signal delay of the input signal transmitted by each input interface, where the voltage 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. Based on the signal delay of input signals whose voltage is less than the first set voltage value and the signal delay of input signals whose voltage is greater than the second set voltage value, the signal delay of input signals whose current is less than the first set current value and the signal delay of input signals whose current is greater than the second set current value, calculate the second priority index of each input interface. 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, the input interface matching the current input signal is determined according to the first priority index of each input interface. When the voltage of the current input signal is less than the first set voltage value, or the voltage of the current input signal is greater than the second set voltage value, or the 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, the input interface matching the current input signal is determined according to the second priority index of each input interface.

5. The relay protection and output matrix detection device according to claim 4, characterized in that: The delay detection module is used to calculate the first priority index according to the following formula: ； ； ； in, As the top priority indicator, The first formula relating current and signal delay is given when the input signal current is greater than or equal to a first set current value and less than or equal to a second set current value. The second relationship between voltage and signal delay is defined when the voltage of the input signal is greater than or equal to a first set voltage value and less than or equal to a second set voltage value. For signal delay, The current of the input signal, The voltage of the input signal. for The corresponding mean square error, for The corresponding mean square error, This is the first current priority parameter. This is the first voltage priority parameter. To determine the number of current data sets consisting of pairs of current and signal delays used in the first relation, To determine the number of voltage data pairs consisting of voltage and signal delays used in the second relation, The signal delay in the a-th current data group, For the current value in the a-th current data set, For the signal delay in the b-th voltage data group, For the voltage value in the b-th voltage data group, The maximum current value in all current data sets. The minimum current value among all current data sets. The maximum voltage value in all voltage data sets. The minimum voltage value among all voltage data sets; The delay detection module is used to calculate the second priority index according to the following formula: ； ； ； in, It is the second priority indicator; The third equation relating current and signal delay when the current of the input signal is greater than the second set current value; The sixth equation relating current and signal delay when the current of the input signal is less than the first set current value; The fourth relationship between voltage and signal delay when the voltage of the input signal is greater than the second set voltage value; The fifth equation relating voltage and signal delay when the input signal voltage is less than the first set voltage value. for The corresponding mean square error, for The corresponding mean square error, for The corresponding mean square error; This is the second current priority parameter. This is the second voltage priority parameter. To determine the number of current data groups consisting of pairs of current and signal delays used in the sixth relation, To determine the number of voltage data pairs consisting of current and signal delays used in the third relation, To determine the number of voltage data pairs consisting of voltage and signal delays used in the fifth relation, To determine the number of current data sets consisting of voltage and signal delay pairs used in the fourth relation, Rated current, To determine the signal delay in the c-th current data group used in the sixth relation, To determine the current value in the c-th current data set used in the sixth relation, Rated voltage, To determine the signal delay in the d-th voltage data group used in the fifth relation, The voltage value in the d-th voltage data set is used to determine the fifth relation.

6. The relay protection and output 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.

7. The relay protection and output matrix detection device according to claim 1, characterized in that, Also includes: Display module and timing module; The timing module is electrically connected to the display module, the delay detection module, and the processing module, and the display module and the processing module are electrically connected. The display module is used to receive detection commands and send them to the input module, as well as to display the processing results of the processing module; The input module is used to receive corresponding input signals from the relay protection equipment and the output matrix after receiving a detection command; The timing module is used to record the first time when the display module receives the detection command and the second time when the processing module receives the input signal, and to 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 based on the voltage of the input signal detected by the voltage detection unit, the current of the input signal detected by the current detection unit, the second time, and the first time.

8. The relay protection and output matrix detection device according to claim 7, 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 based on the voltage of the input signal detected by the voltage detection unit, the current of the input signal detected by the current detection unit, the second time, and the first time. The interface priority index calculation unit is used to calculate the priority index of each input interface based on the signal delay when each input interface transmits input signals with different voltages and currents.

9. The relay protection and output 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 each detection. The data analysis unit is used to schedule the algorithm stored in the algorithm storage unit according to the detection instruction, and to 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 current input signal after filtering and amplification; The input module also includes indicator lights and protection circuits; Each indicator light is connected to a corresponding input interface; The protection circuit is disposed between the input interface and the internal transmission unit. The protection circuit includes a diode or a fuse and is used to protect the internal transmission unit from overvoltage or transient current.

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