Relay protection switch quantity output method and device

Abstract

This invention relates to the field of electrical quantity measurement technology, and in particular to a method and apparatus for outputting relay protection switching quantities. The method includes: acquiring the potential signal of a target relay in the secondary circuit of a relay protection device; determining whether the target relay has activated based on a comparison between the potential signal and a preset reference signal; if so, performing a first countdown operation for a preset first duration; continuously outputting the relay protection switching quantity after the first countdown operation ends, and simultaneously performing a second countdown operation for a preset second duration; stopping the output of the relay protection switching quantity after the second countdown operation ends. This method solves the technical problem of low accuracy in relay protection switching quantities output by existing potential application methods, improves the accuracy of the output relay protection switching quantity, and provides an accurate data source for the daily commissioning and testing of relay protection devices.

Description

Technical Field

[0001] This invention relates to the field of electrical quantity measurement technology, and in particular to a method and device for outputting relay protection switching quantities. Background Technology

[0002] Relay protection devices consist of measurement and comparison elements, logic judgment elements, and execution output elements. They are complete automated devices that can issue warning signals or directly send trip or close commands to the circuit breakers they control when an anomaly or fault occurs in the power system, ensuring that the fault range is minimized and that it can be promptly isolated. During the single-unit commissioning or daily operation and maintenance of relay protection devices, functional verification is required. This involves simulating faults within their protection range to verify whether the relay protection device can operate correctly according to the set logic and settings. This verification process is of great significance for the safe and stable operation of the power system.

[0003] In power systems, relay protection switching quantities refer to the open / closed status of circuit breakers and disconnectors, or blocking signals sent by external devices to the relay protection device. These are often used as input quantities in the relay protection logic judgment. However, during the routine commissioning and testing of relay protection devices, situations may arise where the relay protection switching quantities fail to output correctly, making it difficult to fully simulate the protection action logic of the relay protection device and hindering commissioning and testing. To solve this problem, existing technology uses a manual setting method, whereby the commissioning personnel apply a potential to the corresponding input position of the switching quantity to achieve the output of the relay protection switching quantity.

[0004] Currently, there are two main methods for applying the potential. One is for commissioning personnel to use short-circuit test leads to short-circuit the corresponding switch input position with the positive potential of the DC circuit of the terminal block. However, there is a certain delay between the relay action and the switch change, requiring coordination among commissioning personnel. If the delay is very short, coordination becomes difficult, and it is often impossible to accurately apply the potential within the specified delay. The second method is for commissioning personnel to use the state sequence test window of the relay protection tester to set a certain delay output and connect the test leads to the corresponding switch position for application. However, the delay set by the relay protection tester cannot be accurate to the start time of the relay action in the secondary circuit, and the tester is large and heavy, which is inconvenient for on-site device commissioning. Summary of the Invention

[0005] This invention provides a method and apparatus for outputting relay protection switching quantities, addressing the technical problem of low accuracy in relay protection switching quantities output by existing potential application methods.

[0006] This invention provides a method for outputting relay protection switching quantities, comprising:

[0007] Acquire the potential signal of the target relay in the secondary circuit of the relay protection device;

[0008] Based on the comparison result between the potential signal and the preset reference signal, it is determined whether the target relay has been activated;

[0009] If so, a first countdown operation is performed for a preset first duration. After the first countdown operation ends, the relay protection switch quantity is continuously output. At the same time, a second countdown operation is performed for a preset second duration. After the second countdown operation ends, the output of the relay protection switch quantity stops.

[0010] Optionally, the continuously output relay protection switching quantity includes:

[0011] The target external circuit is connected; wherein the two ends of the target external circuit are respectively connected to the positive potential terminal and the negative potential terminal of the target switch input position;

[0012] When the target external circuit is turned on, the positive and negative potential terminals of the target switch input position are connected, so that the target switch input position transmits the relay protection switch quantity to the relay protection device.

[0013] Optionally, stopping the output of the relay protection switching quantity includes:

[0014] Disconnect the target external circuit to break the connection between the positive and negative potential terminals of the target switch input position, thereby stopping the target switch input position from transmitting relay protection switch signals to the relay protection device.

[0015] Optionally, the target relay includes a coil;

[0016] The potential signal of the target relay in the secondary circuit of the relay protection device is collected, including:

[0017] The potential signal on one side of the coil is acquired.

[0018] Optionally, the target relay includes contacts;

[0019] The potential signal of the target relay in the secondary circuit of the relay protection device is collected, including:

[0020] Collect the potential signals at both ends of the contact.

[0021] Another aspect of the present invention provides a relay protection switching output device, the device comprising:

[0022] The signal input circuit is connected to the target relay and is used to acquire the potential signal of the target relay in the secondary circuit of the relay protection device.

[0023] The main control module, connected to the signal input circuit, is used to determine whether the target relay has activated based on the comparison result between the potential signal and the preset reference signal; if so, it performs a first countdown operation for a preset first duration, and after the first countdown operation ends, it continuously outputs the relay protection switch quantity, and simultaneously performs a second countdown operation for a preset second duration, and after the second countdown operation ends, it stops outputting the relay protection switch quantity.

[0024] Optionally, the main control module is connected to an external circuit located between the positive potential of the DC circuit of the terminal block and the target switch input position, specifically for turning on the target external circuit after the first countdown operation ends;

[0025] Wherein, the two ends of the target external circuit are respectively connected to the positive potential end and the negative potential end of the target switch input position;

[0026] When the target external circuit is turned on, the positive and negative potential terminals of the target switch input position are connected, so that the target switch input position transmits the relay protection switch quantity to the relay protection device.

[0027] Optionally, the main control module is specifically used to disconnect the target external circuit after the second countdown operation ends, thereby disconnecting the connection between the positive and negative potential terminals of the target switch input position, so that the target switch input position stops transmitting the relay protection switch quantity to the relay protection device.

[0028] Optionally, the target relay includes a coil;

[0029] The signal input circuit is specifically used to acquire the potential signal on one side of the coil.

[0030] Optionally, the target relay includes contacts;

[0031] The signal input circuit is specifically used to collect the potential signals at both ends of the contact.

[0032] As can be seen from the above technical solutions, the present invention has the following advantages:

[0033] This invention provides a method for outputting a relay protection switching quantity, comprising: acquiring the potential signal of a target relay in the secondary circuit of a relay protection device; determining whether the target relay has operated based on a comparison result between the potential signal and a preset reference signal; if so, performing a first countdown operation for a preset first duration; continuously outputting the relay protection switching quantity after the first countdown operation ends, and simultaneously performing a second countdown operation for a preset second duration; stopping the output of the relay protection switching quantity after the second countdown operation ends.

[0034] In this invention, by acquiring the potential signal of the target relay in the secondary circuit of the relay protection device, and comparing the potential signal with a preset reference signal, it is determined whether the target relay has activated. This accurately determines whether the target relay in the secondary circuit has activated, providing effective data support for improving the output accuracy of the relay protection switch quantity. After determining that the target relay has activated, a first countdown operation is performed for a preset first duration. After the first countdown operation ends, the relay protection switch quantity is continuously output, and a second countdown operation is performed for a preset second duration. After the second countdown operation ends, the output of the relay protection switch quantity stops, realizing the timed automatic output of the relay protection switch quantity. Therefore, the output method provided by this invention can accurately and automatically output the relay protection switch quantity based on the state of the target relay in the secondary circuit of the relay protection device, solving the technical problem of low accuracy of the relay protection switch quantity output by existing potential application methods, improving the accuracy of the output relay protection switch quantity, and providing an accurate data source for the daily debugging and testing of the relay protection device. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a flowchart illustrating the steps of a relay protection switching output method according to an embodiment of the present invention.

[0037] Figure 2 A schematic diagram illustrating the principle of measuring the potential signal of a target relay provided in an embodiment of the present invention;

[0038] Figure 3 Another schematic diagram illustrating the principle of measuring the potential signal of the target relay provided in an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of another step in a relay protection switching quantity output method provided by an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram illustrating the connection relationship between the target external circuit and the target switch input position provided in an embodiment of the present invention;

[0041] Figure 6A schematic diagram of the structure of a relay protection switching output device provided in an embodiment of the present invention;

[0042] Figure 7 This is another structural schematic diagram of a relay protection switching output device provided in an embodiment of the present invention;

[0043] Figure 8 A schematic diagram illustrating the architecture principle of a microcontroller provided in an embodiment of the present invention;

[0044] Figure 9 This is a schematic diagram illustrating the usage process of a relay protection switching output device provided in an embodiment of the present invention. Detailed Implementation

[0045] Relay protection switching quantities are commonly used in common relay protection logic, such as automatic transfer switch (ATS) or three-phase inconsistency protection. In this system, when the relay protection device determines that its detected data meets certain conditions, it activates the relay. After a certain delay, it checks for a change in a switching quantity before proceeding with the subsequent protection action logic analysis. However, during the routine commissioning and testing of relay protection devices, situations may arise where related circuit breakers or disconnectors are not de-energized for maintenance, preventing them from actually opening or closing. Alternatively, external devices sending interlocking signals to this relay protection device may not be deactivated for commissioning, resulting in no external interlocking signal input. This makes it impossible to fully simulate the protection action logic process of the relay protection device, hindering commissioning and testing. To address these issues, existing technology employs a manual setting method, where commissioning personnel apply a potential to the corresponding input position of the switching quantity to achieve the output of the relay protection switching quantity.

[0046] Currently, there are two main methods for applying potential. One is for commissioning personnel to use short-circuit test leads to short-circuit the corresponding switch input position with the positive potential of the DC circuit of the terminal block. However, there is a certain delay between the relay action and the switch change, requiring coordination among commissioning personnel. If the delay is very short, coordination becomes difficult, and it is often impossible to accurately apply the potential within the specified delay. The second method is for commissioning personnel to use the state sequence test window of the relay protection tester to set a certain delay output and connect the test lead to the corresponding switch position for application. However, the delay set by the relay protection tester cannot be accurate to the start time of the relay action in the secondary circuit, and the tester is large and heavy, making it inconvenient for on-site device commissioning. It can be seen that the existing potential application methods have technical problems such as low accuracy and inconvenience in outputting relay protection switch quantities.

[0047] To address the aforementioned issues, this invention provides a method and apparatus for relay protection switch output. By directly measuring the coil potential change or the on / off change of the relay action contacts when the relevant relays in the relay protection device circuit are activated, the relay protection action signal is acquired. Furthermore, by controlling the conduction and disconnection of the external circuit between the positive potential of the DC circuit of the control terminal block and the corresponding switch input position, the timed automatic output of the relay protection switch level is achieved. The apparatus is simple to use and easy to carry.

[0048] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0049] Please see Figure 1 The present invention provides a method for outputting a relay protection switching quantity, comprising:

[0050] 101. Acquire the potential signal of the target relay in the secondary circuit of the relay protection device;

[0051] 102. Based on the comparison result between the potential signal and the preset reference signal, determine whether the target relay has operated.

[0052] It should be noted that the secondary circuit of the relay protection device includes a preceding logic circuit and related relays, with the preceding logic circuit connected to the related relays. Specifically, the preceding logic circuit refers to the pre-processing logic judgment circuit in the relay protection device. It acts as a pre-triggering device for relay operation, responding to the conduction signal issued by the relay protection device to trigger the connected relays to operate, thus achieving relay protection. The related relays connected to the aforementioned logic circuit are the target relays in this step.

[0053] Under normal conditions, the preceding logic circuit is open, so the target relay is de-energized. When the relay protection device determines that the detected data meets its internally set preceding logic requirements, it connects the preceding logic circuit, energizes the target relay, and causes it to operate. Conversely, when the preceding logic circuit is not connected, the target relay is de-energized and does not operate.

[0054] The change in the potential signal of the target relay can provide feedback on the state of the target relay, thereby determining whether the target relay has activated. Specifically, the activation of the target relay is determined based on the comparison between the potential signal and a preset reference signal.

[0055] In one example, the reference signal could be a signal that characterizes the target relay as being in a de-energized state.

[0056] The determination of whether the target relay has operated is based on the comparison between the potential signal and the preset reference signal. Specifically, if the potential signal is consistent with the preset reference signal, the target relay is determined not to have operated; if the potential signal is inconsistent with the preset reference signal, the target relay is determined to have operated.

[0057] In another example, the reference signal could be a signal characterizing that the target relay is energized.

[0058] The determination of whether the target relay has operated is based on the comparison between the potential signal and the preset reference signal. Specifically, if the potential signal is consistent with the preset reference signal, the target relay is determined to have operated; if the potential signal is inconsistent with the preset reference signal, the target relay is determined not to have operated.

[0059] 103. If so, perform a first countdown operation for the preset first duration. After the first countdown operation ends, continuously output the relay protection switch quantity. At the same time, perform a second countdown operation for the preset second duration. After the second countdown operation ends, stop outputting the relay protection switch quantity.

[0060] It should be noted that the preset first duration is used to determine the start time of the output relay protection switch quantity. The preset second duration is used to determine the output duration of the relay protection switch quantity. Both the first and second preset durations can be pre-set according to actual commissioning requirements. For example, the first duration can be set according to the delay requirements of the object protected by the target relay, and the second duration can be set according to the duration of the input quantity of the object protected by the target relay.

[0061] In one example, the relay protection switching quantity can be an electrical signal.

[0062] In this step, after the target relay is activated, a first countdown operation is performed for a preset first duration to meet the delay requirements of the relay protection device's protection logic. After the first countdown ends, the relay protection switch quantity is output, and a second countdown operation is performed for a preset second duration. During the countdown of the second duration, the relay protection switch quantity is continuously output. When the second countdown operation is completed, the output of the relay protection switch quantity stops, thereby providing accurate switch quantity data for the complete simulation of the relay protection device's protection action logic.

[0063] Therefore, in this embodiment of the invention, based on the operating state of the target relay in the secondary circuit of the relay protection device, the timing of the automatic output of the relay protection switching quantity is accurately performed. This avoids the situation where the delay set in the existing relay protection switching quantity output method is difficult to accurately match the start time of the relay operation in the secondary circuit, resulting in low accuracy of the output relay protection switching quantity. This improves the accuracy of the output relay protection switching quantity and provides an accurate data source for the daily commissioning and testing of the relay protection device.

[0064] In one embodiment, the target relay includes a coil, and step 101 specifically includes:

[0065] The potential signal on one side of the acquisition coil is collected.

[0066] It should be noted that, as Figure 2 As shown, +KM is the positive terminal of the power supply, and -KM is the negative terminal. The preceding logic circuit 3 of the relay protection device is connected to the coil 4 of the target relay. Potential signals are acquired at one side of the coil 4, i.e., at measurement point 1 in the figure.

[0067] It is understandable that when the preceding logic circuit 3 is turned on, the circuit between coil 4, the preceding logic circuit 3, and the power supply is turned on, thereby energizing coil 4 and causing the target relay to operate. At this time, the potential signal at measurement point 1 has changed compared to when it is not turned on. Therefore, by collecting the potential signal at measurement point 1, it can be determined whether the target relay has operated.

[0068] In another embodiment, the target relay includes contacts. Step 101 specifically includes:

[0069] Collect the potential signals at both ends of the contact.

[0070] It should be noted that, as Figure 3 As shown, +KM is the positive terminal of the power supply, and -KM is the negative terminal. The preceding logic circuit 3 of the relay protection device is connected to the coil 4 of the target relay. The contacts of the target relay are connected to the preceding logic circuit 3. In this embodiment, the potential signal at both ends of the contacts is collected, and the collection location is shown as measurement point 2 in the figure.

[0071] It is understandable that when the preceding logic circuit 3 is turned on, the circuit between coil 4, preceding logic circuit 3, and power supply is turned on, thereby energizing coil 4 and driving the contacts of the target relay to close, thus turning on the circuit between the contacts, preceding logic circuit 3, and power supply. At this time, the potential signal at measurement point 2 has changed compared to when it is not turned on. Therefore, by collecting the potential signal at measurement point 2, it can be determined whether the target relay has operated.

[0072] Based on the above, this embodiment achieves the acquisition of relay protection action signals by directly measuring the coil potential change of relevant relays when they are started in the relay protection device circuit, or the on / off change of the relevant relay action contacts. The acquisition method is simple and direct, and can be widely used in the acquisition of action signals of various relays. It can also accurately reflect the action timing of the relays in the secondary circuit, providing strong technical support for the accurate output of relay protection switching quantities.

[0073] Please see Figure 4 The steps of the relay protection switching output method provided in this embodiment of the invention include:

[0074] 201. Collect the potential signal of the target relay in the secondary circuit of the relay protection device;

[0075] 202. Based on the comparison result between the potential signal and the preset reference signal, determine whether the target relay has operated.

[0076] It should be noted that the secondary circuit of the relay protection device includes a preceding logic circuit and related relays, with the preceding logic circuit connected to the related relays. Specifically, the preceding logic circuit refers to the pre-processing logic judgment circuit in the relay protection device. It acts as a pre-triggering device for relay operation, responding to the conduction signal issued by the relay protection device to trigger the connected relays to operate, thus achieving relay protection. The related relays connected to the aforementioned logic circuit are the target relays in this step.

[0077] Under normal conditions, the preceding logic circuit is open, so the target relay is de-energized. When the relay protection device determines that the detected data meets its internally set preceding logic requirements, it connects the preceding logic circuit, energizes the target relay, and causes it to operate. Conversely, when the preceding logic circuit is not connected, the target relay is de-energized and does not operate.

[0078] The change in the potential signal of the target relay can reflect the state of the target relay. Therefore, by collecting and analyzing the potential signal of the target relay in the secondary circuit of the relay protection device, it can be determined whether the target relay has been activated.

[0079] In one example, the reference signal could be a signal that characterizes the target relay as being in a de-energized state.

[0080] The determination of whether the target relay has operated is based on the comparison between the potential signal and the preset reference signal. Specifically, if the potential signal is consistent with the preset reference signal, the target relay is determined not to have operated; if the potential signal is inconsistent with the preset reference signal, the target relay is determined to have operated.

[0081] In another example, the reference signal could be a signal characterizing that the target relay is energized.

[0082] The determination of whether the target relay has operated is based on the comparison between the potential signal and the preset reference signal. Specifically, if the potential signal is consistent with the preset reference signal, the target relay is determined to have operated; if the potential signal is inconsistent with the preset reference signal, the target relay is determined not to have operated.

[0083] 203. If so, a first countdown operation is performed for a preset first duration. After the first countdown operation ends, the target external circuit is turned on, wherein the two ends of the target external circuit are respectively connected to the positive potential terminal and the negative potential terminal of the target switch input position. When the target external circuit is turned on, the positive potential terminal and the negative potential terminal of the target switch input position are connected, so that the target switch input position transmits the relay protection switch quantity to the relay protection device. At the same time, a second countdown operation is performed for a preset second duration. After the second countdown operation ends, the target external circuit is turned off, so that the connection between the positive potential terminal and the negative potential terminal of the target switch input position is broken, so that the target switch input position stops transmitting the relay protection switch quantity to the relay protection device.

[0084] It should be noted that the target switch input position refers to the switch input terminal used to receive the feedback target relay position signal. It is the physical access point for the relay protection device to identify the switch signal and is connected to the relay protection device. The target switch input position is equipped with both positive and negative potential terminals. For example... Figure 5 As shown, one end of the positive potential terminal is connected to the DC power supply, and the negative potential terminal is connected to the relay protection device. When the positive potential terminal and the negative potential terminal are connected, a circuit is formed between the DC power supply, the target switch input position, and the relay protection device, so that the relay protection device can receive the electrical signal of the target switch input position. This electrical signal is then used as the switching quantity that feeds back the target relay to change position.

[0085] Specifically, in this embodiment, the target external circuit is connected to the positive and negative potential terminals of the target switch input position to conduct the connection between the positive and negative potential terminals, or to disconnect the connection between the positive and negative potential terminals.

[0086] The target external circuit has both an on and off state. When the target external circuit is on, the connection between the positive and negative potential terminals is established, causing the target switch input position to transmit the relay protection switch quantity to the relay protection device. When the target external circuit is off, the connection between the positive and negative potential terminals is broken, and the target switch input position stops transmitting the relay protection switch quantity to the relay protection device.

[0087] Based on the above, this embodiment collects the potential signal of the target relay in the secondary circuit of the relay protection device, and determines whether the target relay has acted based on the comparison result of the potential signal and the preset reference signal. This accurately determines whether the target relay in the secondary circuit has acted, providing effective data support for improving the output accuracy of the relay protection switch quantity. After determining that the target relay has acted, a first countdown operation is performed for a preset first duration. After the first countdown operation ends, the target external circuit is connected, so that the connection between the positive potential terminal and the negative potential terminal of the target switch quantity input position is connected, thereby transmitting the relay protection switch quantity from the target switch quantity input position to the relay protection device. Furthermore, while the target external circuit is connected, a second countdown operation is performed for a preset second duration. After the second countdown operation ends, the target external circuit is disconnected, breaking the connection between the positive and negative potential terminals of the target switch input position. This stops the target switch input position from transmitting the relay protection switch quantity to the relay protection device. Based on this, it can be seen that the method provided in this embodiment can switch the on / off state of the external circuit based on the state of the target relay in the secondary circuit of the relay protection device, the first countdown operation, and the second countdown operation to control the output and stop of the relay protection switch quantity. This accurately realizes the timed automatic output of the relay protection switch quantity, solves the technical problem of low accuracy of the relay protection switch quantity output by the existing potential application method, improves the accuracy of the output relay protection switch quantity, and provides an accurate data source for the daily debugging and inspection work of the relay protection device.

[0088] In one possible implementation, there can be multiple target relays and multiple sets of target switching input positions. Different switching input positions are used to receive different switching signals. Specifically, the positive and negative potential terminals of multiple sets of target switching input positions can be connected to a terminal block DC circuit. Corresponding positive and negative potential interfaces are then led out from the terminal block DC circuit and connected to the corresponding target external circuit.

[0089] It should be noted that the terminal block DC circuit is a DC electrical path in a relay protection device, with the device terminal block as the centralized electrical connection node, powered by a DC power supply. It is used for inputting / output switching quantities, driving relays, transmitting control signals, and making logic judgments. It is the core power supply and signal transmission circuit of the relay protection secondary circuit. Specifically, the positive potential interface of the terminal block DC circuit refers to the stable potential interface between the positive terminal of the DC power supply provided by the DC power supply and ground, which is led out from the device terminal block in the relay protection secondary system. It is the source of the input quantities for the relay protection device.

[0090] When the positive potential interface of the DC circuit of the terminal block establishes a conductive connection with the negative potential corresponding to the input position of the target switch quantity, the DC circuit of the terminal block can transmit an electrical signal to the input position of the target switch quantity, and input it to the control unit inside the relay protection device through the input position of the target switch quantity, so that the control unit of the relay protection device can recognize the valid electrical signal as an input quantity, and thus execute subsequent logic judgments.

[0091] In one possible implementation, connecting the target external circuit may include:

[0092] Generate and output the first target level signal to connect the target external circuit.

[0093] It should be noted that since the target external circuit has a conducting state and an open state, a corresponding level signal can be input to the target external circuit to switch the state of the target external circuit.

[0094] In one example, if the target external circuit is a high-level conducting circuit, then the first target level signal is a high-level signal.

[0095] In one example, if the target external circuit is a low-level conducting circuit, then the first target level signal is a low-level signal.

[0096] Therefore, in this embodiment, after the first countdown operation ends, the first target level signal is output to the target external circuit, thereby turning on the target external circuit to connect the positive and negative potential terminals of the target switch input position, so that the target switch input position transmits the relay protection switch quantity to the relay protection device.

[0097] In one possible implementation, disconnecting the target external circuit may include:

[0098] Generate and output a second target level signal to disconnect the target's external circuit.

[0099] It should be noted that the second target level signal is set according to the signal required to disconnect the target's external circuit.

[0100] In one example, if the target external circuit is a high-level disconnected circuit, then the first target level signal is a high-level signal.

[0101] In one example, if the target external circuit is a low-level disconnected circuit, then the first target level signal is a low-level signal.

[0102] Based on this, in this embodiment, after the second countdown operation ends, a second target level signal is output to the target external circuit to disconnect the external circuit, thereby disconnecting the connection between the positive potential terminal and the negative potential terminal of the target switch input position, so that the target switch input position stops transmitting the relay protection switch quantity to the relay protection device.

[0103] In one possible implementation, the target external circuit may include a small electromagnetic relay, a freewheeling diode, and a current-limiting protection resistor.

[0104] The contacts of the electromagnetic relay are connected in series between the positive and negative potential terminals of the target switching input position, forming a contact circuit. A current-limiting resistor is connected in series within this contact circuit. The coil of the electromagnetic relay has two input terminals for the control signal, used to respond to the received level signal. A freewheeling diode is connected in reverse parallel across the coil of the electromagnetic relay.

[0105] The working principle of the target external circuit is as follows: the coil of the electromagnetic relay responds to the received first target level signal, driving the relay contacts to close, thereby realizing the conduction of the target external circuit and thus connecting the positive and negative potential terminals of the target switch input position; the coil of the electromagnetic relay responds to the received second target level signal, driving the relay contacts to open, thereby disconnecting the target external circuit and thus disconnecting the positive and negative potential terminals of the target switch input position. Based on this, the switching between the conduction and disconnection states of the target external circuit is realized, and the structure is simple, the cost is low, and the versatility is strong.

[0106] In one possible implementation, the target external circuit may include an optocoupler, an input-side current-limiting resistor, an output-side protection resistor, and a TVS transient suppression diode.

[0107] The input-side current-limiting resistor is connected to the input side of the optocoupler and is used to receive level signals.

[0108] One end of the output side of the optocoupler is connected in series with an output side protection resistor and connected to the positive potential terminal of the target switch input position;

[0109] The other end of the output side of the optocoupler is connected to the negative potential terminal of the target switch input position;

[0110] TVS transient suppression diodes can be connected in parallel across the output side of an optocoupler.

[0111] The working principle of the target external circuit is as follows: When a first target level signal is input to the current-limiting resistor on the input side, the first target level signal drives the input side of the optocoupler to emit light, and the output side of the optocoupler is photoelectrically connected, realizing the conduction of the target external circuit, thereby realizing the connection between the positive and negative potential terminals of the target switch input position; when a second target level signal is input to the current-limiting resistor on the input side, the input side of the optocoupler stops emitting light, and the output side of the optocoupler is cut off, realizing the disconnection of the target external circuit, thereby realizing the disconnection between the positive and negative potential terminals of the target switch input position; based on this, the switching between the on and off states of the target external circuit is realized, and electrical isolation is achieved, reducing electromagnetic interference.

[0112] In one possible implementation, the target external circuit may include a transistor, a current-limiting resistor, and a protection resistor.

[0113] One end of the current-limiting resistor is used to receive the level signal, and the other end of the current-limiting resistor is used to connect to the base of the transistor.

[0114] The collector of the transistor is connected to the positive potential terminal of the target switching input position;

[0115] The emitter of the transistor is connected to a protection resistor, and through the protection resistor, it is connected to the negative potential terminal of the target switch input position.

[0116] The working principle of the target external circuit is as follows: when a first target level signal is input to the current-limiting resistor, the first target level signal drives the transistor to conduct, realizing the conduction of the target external circuit, thereby realizing the connection between the positive and negative potential terminals of the target switch input position; when a second target level signal is input to the current-limiting resistor, the transistor is cut off, realizing the disconnection of the target external circuit, thereby realizing the disconnection between the positive and negative potential terminals of the target switch input position; based on this, the switching between the conduction and disconnection states of the target external circuit is realized.

[0117] In one possible implementation, the target external circuit may include a MOSFET, a current-limiting resistor, a protection resistor, and a Zener diode.

[0118] One end of the current-limiting resistor is used to receive the level signal, and the other end of the current-limiting resistor is used to connect to the gate of the MOSFET.

[0119] The drain of the MOSFET is connected to the positive potential terminal of the target switching input position;

[0120] The source of the MOSFET is connected to a protection resistor, and through the protection resistor, it is connected to the negative potential terminal of the target switch input position.

[0121] A Zener diode is connected in parallel between the gate and source of the MOSFET to prevent damage from overvoltage.

[0122] The working principle of the target external circuit is as follows: when a first target level signal is input to the current-limiting resistor, the first target level signal drives the MOSFET to conduct, realizing the conduction of the target external circuit, thereby realizing the connection between the positive and negative potential terminals of the target switch input position; when a second target level signal is input to the current-limiting resistor, the MOSFET is cut off, realizing the disconnection of the target external circuit, thereby realizing the disconnection between the positive and negative potential terminals of the target switch input position; based on this, the switching between the conduction and disconnection states of the target external circuit is realized.

[0123] It is understood that the target external circuits listed above are merely illustrative examples, and the structure of the target external circuit of the present invention is not limited to the above examples. In practical applications, appropriate power electronic devices can be set according to the actual situation to form a target external circuit with a conducting state and a disconnecting state, and the conducting state and disconnecting state can be switched by an electrical signal.

[0124] The above describes a method for outputting a relay protection switching quantity according to an embodiment of the present invention. The following describes the apparatus for executing the above method for outputting a relay protection switching quantity.

[0125] Please see Figures 6 to 8 A relay protection switching output device, the device comprising:

[0126] The signal input circuit 5 is connected to the target relay 6 and is used to collect the potential signal of the target relay 6 in the secondary circuit of the relay protection device.

[0127] The main control module 7 is connected to the signal input circuit 5 and is used to determine whether the target relay 6 has been activated based on the comparison result of the potential signal and the preset reference signal. If so, a first countdown operation is performed for a preset first duration. After the first countdown operation ends, the relay protection switch quantity is continuously output. At the same time, a second countdown operation is performed for a preset second duration. After the second countdown operation ends, the output of the relay protection switch quantity is stopped.

[0128] It should be noted that the secondary circuit of the relay protection device includes a pre-sequence logic circuit and related relays, with the pre-sequence logic circuit connected to the related relays. Specifically, the pre-sequence logic circuit refers to the pre-processing logic judgment circuit in the relay protection device. It acts as a pre-triggering device for relay operation, responding to the conduction signal issued by the relay protection device to trigger the connected relays to operate, thus achieving relay protection. The related relay connected to the aforementioned logic circuit is the target relay 6 in this step.

[0129] Under normal conditions, the preceding logic circuit is open, so the target relay 6 is de-energized. When the relay protection device determines that the detected data meets its internally set preceding logic requirements, it connects the preceding logic circuit, energizing the target relay 6 and causing it to operate. Conversely, when the preceding logic circuit is not connected, the target relay 6 is de-energized and does not operate.

[0130] The change in the potential signal of the target relay 6 can reflect the state of the target relay. Therefore, by collecting and analyzing the potential signal of the target relay in the secondary circuit of the relay protection device, it can be determined whether the target relay 6 has been activated.

[0131] In one example, the reference signal could be a signal that characterizes the target relay 6 as being in a de-energized state.

[0132] The main control module 7 determines whether the target relay 6 has operated based on the comparison between the potential signal and the preset reference signal. Specifically, when the potential signal is consistent with the preset reference signal, the main control module 7 determines that the target relay 6 has not operated. When the potential signal is inconsistent with the preset reference signal, the main control module 7 determines that the target relay 6 has operated.

[0133] In another example, the reference signal could be a signal characterizing that the target relay 6 is in an energized state.

[0134] The determination of whether the target relay 6 has acted is based on the comparison result between the potential signal and the preset reference signal. Specifically, when the potential signal is consistent with the preset reference signal, the main control module 7 determines that the target relay 6 has acted; when the potential signal is inconsistent with the preset reference signal, the main control module 7 determines that the target relay 6 has not acted.

[0135] It should be noted that the preset first duration is used to determine the start time of the output relay protection switch quantity. The preset second duration is used to determine the output duration of the relay protection switch quantity. Both the first and second preset durations can be pre-set according to actual commissioning requirements. For example, the first duration can be set according to the delay requirements of the object protected by the target relay 6, and the second duration can be set according to the duration of the input quantity of the object protected by the target relay 6.

[0136] In this embodiment, after the target relay 6 is activated, a first countdown operation is performed on a preset first duration to meet the delay requirement of the relay protection device's protection logic. After the first countdown ends, the relay protection switch quantity is output, and a second countdown operation is performed on a preset second duration. During the countdown of the second duration, the relay protection switch quantity is continuously output. When the second countdown operation is completed, the output of the relay protection switch quantity stops, thereby providing accurate switch quantity data for the process of completely simulating the protection action logic of the relay protection device.

[0137] Therefore, in this embodiment of the invention, based on the operating state of the target relay 6 in the secondary circuit of the relay protection device, the timing automatic output of the relay protection switching quantity is accurately performed. This avoids the situation where the delay set in the existing relay protection switching quantity output method is difficult to accurately match the start time of the relay operation in the secondary circuit, resulting in low accuracy of the output relay protection switching quantity. This improves the accuracy of the output relay protection switching quantity and provides an accurate data source for the daily debugging and inspection of the relay protection device.

[0138] In one embodiment, the target relay 6 includes a coil;

[0139] The signal input circuit 5 is specifically used to acquire the potential signal on one side of the coil.

[0140] It should be noted that, as Figure 2 As shown, +KM is the positive terminal of the power supply, and -KM is the negative terminal. The preceding logic circuit 3 of the relay protection device is connected to the coil 4 of the target relay 6. Potential signals are acquired at one side of the coil 4, i.e., at measurement point 1 in the figure.

[0141] It is understandable that when the preceding logic circuit 3 is turned on, the circuit between coil 4, preceding logic circuit 3, and power supply is turned on, thereby energizing coil 4 and causing target relay 6 to operate. At this time, the potential signal at measurement point 1 has changed compared to when it is not turned on. Therefore, by collecting the potential signal at measurement point 1, it can be determined whether target relay 6 has operated.

[0142] In one embodiment, the target relay 6 includes contacts;

[0143] The signal input circuit 5 is specifically used to collect the potential signal at both ends of the contact.

[0144] It should be noted that, as Figure 3 As shown, +KM is the positive terminal of the power supply, and -KM is the negative terminal. The preceding logic circuit 3 of the relay protection device is connected to the coil 4 of the target relay 6. The contacts of the target relay 6 are connected to the preceding logic circuit 3. In this embodiment, the potential signal at both ends of the contacts is collected, and the collection location is shown as measurement point 2 in the figure.

[0145] It is understandable that when the preceding logic circuit 3 is turned on, the circuit between coil 4, preceding logic circuit 3, and power supply is turned on, thereby energizing coil 4 and driving the contacts of target relay 6 to close, thus turning on the circuit between contacts, preceding logic circuit 3, and power supply. At this time, the potential signal at measurement point 2 has changed compared to when it is not turned on. Therefore, by collecting the potential signal at measurement point 2, it can be determined whether target relay 6 has operated.

[0146] Based on the above, this embodiment achieves the acquisition of relay protection action signals by directly measuring the coil potential change of relevant relays when they are started in the relay protection device circuit, or the on / off change of the relevant relay action contacts. The acquisition method is simple and direct, and can be widely used in the acquisition of action signals of various relays. It can also accurately reflect the action timing of the relays in the secondary circuit, providing strong technical support for the accurate output of relay protection switching quantities.

[0147] In one embodiment, the main control module 7 is connected to the target external circuit, specifically used to turn on the target external circuit after the first countdown operation ends; wherein, the two ends of the target external circuit are respectively connected to the positive potential terminal and the negative potential terminal of the target switch input position; when the target external circuit is turned on, the positive potential terminal and the negative potential terminal of the target switch input position are connected, so that the target switch input position transmits the relay protection switch quantity to the relay protection device.

[0148] In one embodiment, the main control module 7 is specifically used to disconnect the target external circuit after the second countdown operation ends, thereby disconnecting the connection between the positive potential terminal and the negative potential terminal of the target switch input position, so that the target switch input position stops transmitting the relay protection switch quantity to the relay protection device.

[0149] It should be noted that the target switch input position refers to the switch input terminal used to receive the feedback target relay 6 position change signal. It is the physical access point for the relay protection device to identify the switch signal and is connected to the relay protection device. The target switch input position has a positive potential terminal and a negative potential terminal. As shown in the figure, one end of the positive potential terminal is connected to the DC power supply, and the negative potential terminal is connected to the relay protection device. When the positive and negative potential terminals are connected, a circuit is formed between the DC power supply, the target switch input position, and the relay protection device. This allows the relay protection device to receive the electrical signal of the target switch input position, which then serves as the switch signal indicating a position change in the target relay 6.

[0150] Specifically, in this embodiment, the target external circuit is connected to the positive and negative potential terminals of the target switch input position to conduct the connection between the positive and negative potential terminals, or to disconnect the connection between the positive and negative potential terminals.

[0151] The target external circuit has both on and off states. When the main control module 7 connects the target external circuit, the connection between the positive and negative potential terminals is established, allowing the target switch input position to transmit the relay protection switch quantity to the relay protection device. When the main control module 7 disconnects the target external circuit, the connection between the positive and negative potential terminals is broken, and the target switch input position stops transmitting the relay protection switch quantity to the relay protection device.

[0152] Based on the above, in this embodiment, the signal input circuit 5 collects the potential signal of the target relay 6 in the secondary circuit of the relay protection device. The main control module 7 determines whether the target relay 6 has acted based on the comparison result between the potential signal and the preset reference signal, thereby accurately determining whether the target relay 6 in the secondary circuit has acted. This provides effective data support for improving the output accuracy of the relay protection switch quantity. After the main control module 7 determines that the target relay 6 has acted, it performs a first countdown operation for a preset first duration. After the first countdown operation ends, the main control module 7 connects the target external circuit, making the connection between the positive potential terminal and the negative potential terminal of the target switch quantity input position connected, thereby enabling the target switch quantity input position to transmit the relay protection switch quantity to the relay protection device. Furthermore, while the main control module 7 is conducting the target external circuit, the main control module 7 performs a second countdown operation for the preset second duration. When the second countdown operation ends, the main control module 7 disconnects the target external circuit, disconnecting the connection between the positive and negative potential terminals of the target switch input position. This stops the target switch input position from transmitting the relay protection switch quantity to the relay protection device. Based on this, it can be seen that the main control module 7 of the output device provided in this embodiment can switch the on / off state of the external circuit based on the state of the target relay 6 in the secondary circuit of the relay protection device, the first countdown operation, and the second countdown operation, in order to control the output and stop of the relay protection switch quantity. This accurately realizes the timed automatic output of the relay protection switch quantity, solves the technical problem of low accuracy of the relay protection switch quantity output by the existing potential application method, improves the accuracy of the output relay protection switch quantity, and provides an accurate data source for the daily debugging and inspection work of the relay protection device.

[0153] In one possible implementation, there can be multiple target relays 6, and multiple sets of target switching input positions. Different switching input positions are used to receive different switching signals. Specifically, the positive and negative potential terminals of multiple sets of target switching input positions can be connected to a terminal block DC circuit. Corresponding positive and negative potential interfaces are then led out from the terminal block DC circuit and connected to the corresponding target external circuit.

[0154] It should be noted that the terminal block DC circuit is a DC electrical path in a relay protection device, with the device terminal block as the centralized electrical connection node, powered by a DC power supply. It is used for inputting / output switching quantities, driving relays, transmitting control signals, and making logic judgments. It is the core power supply and signal transmission circuit of the relay protection secondary circuit. Specifically, the positive potential interface of the terminal block DC circuit refers to the stable potential interface between the positive terminal of the DC power supply provided by the DC power supply and ground, which is led out from the device terminal block in the relay protection secondary system. It is the source of the input quantities for the relay protection device.

[0155] When the positive potential interface of the DC circuit of the terminal block establishes a conductive connection with the negative potential corresponding to the input position of the target switch quantity, the DC circuit of the terminal block can transmit an electrical signal to the input position of the target switch quantity, and input it to the control unit inside the relay protection device through the input position of the target switch quantity, so that the control unit of the relay protection device can recognize the valid electrical signal as an input quantity, and thus execute subsequent logic judgments.

[0156] In one possible implementation, the main control module 7 is specifically used to generate and output a first target level signal to connect the target external circuit.

[0157] It should be noted that since the target external circuit has a conducting state and an open state, a corresponding level signal can be input to the target external circuit to switch the state of the target external circuit.

[0158] In one example, if the target external circuit is a high-level conducting circuit, then the first target level signal is a high-level signal.

[0159] In one example, if the target external circuit is a low-level conducting circuit, then the first target level signal is a low-level signal.

[0160] Therefore, in this embodiment, after the first countdown operation ends, the main control module 7 outputs the first target level signal to the target external circuit, thereby turning on the target external circuit to connect the positive and negative potential terminals of the target switch input position, so that the target switch input position transmits the relay protection switch quantity to the relay protection device.

[0161] In one possible implementation, the main control module 7 is specifically used to generate and output a second target level signal to disconnect the target external circuit.

[0162] It should be noted that the second target level signal is set according to the signal required to disconnect the target's external circuit.

[0163] In one example, if the target external circuit is a high-level disconnected circuit, then the first target level signal is a high-level signal.

[0164] In one example, if the target external circuit is a low-level disconnected circuit, then the first target level signal is a low-level signal.

[0165] Based on this, in this embodiment, after the second countdown operation ends, the main control module 7 outputs a second target level signal to the target external circuit, disconnects the external circuit, thereby disconnecting the connection between the positive potential terminal and the negative potential terminal of the target switch input position, so that the target switch input position stops transmitting the relay protection switch quantity to the relay protection device.

[0166] In one embodiment, a key input circuit 8 is also included, which is connected to the main control module 7 to provide human interaction functionality. In one embodiment, the debugging personnel can use the key input circuit 8 to set a first duration and a second duration.

[0167] In one embodiment, a display module 9 is also included, which is connected to the main control module 7.

[0168] It should be noted that the display module 9 can be used to display information that requires human-computer interaction. In one embodiment, the display module 9 can display a first duration, a second duration, and the countdown process.

[0169] In one embodiment, the display module 9 includes a digital tube display driver circuit and a digital tube display screen.

[0170] It should be noted that the digital tube display driver circuit is a dedicated hardware circuit that provides driving current to the digital tube display screen and realizes stable digital visualization. It can quickly light up the digital tube one point at a time in a dynamic scanning manner.

[0171] In one embodiment, a power module 10 is also included, which is connected to the main control module 7 and is used to provide power to the device.

[0172] In one embodiment, the power module 10 includes an AC power input circuit and an AC buck rectifier filter regulator circuit.

[0173] The AC power input circuit is used to receive AC power input.

[0174] The AC step-down rectifier filter regulator circuit is connected to the AC power input circuit and is used to step down, rectify, filter and regulate the received AC power to provide suitable electrical energy to the device.

[0175] In one example, the AC buck rectifier filter regulator circuit includes: a buck unit, a rectifier unit, a filter unit, and a regulator unit.

[0176] The step-down unit is used to reduce the high-voltage AC power to low-voltage AC power and then transmit the low-voltage AC power to the rectifier unit.

[0177] The rectifier unit is used to convert low-voltage AC power into first DC power and transmit the first DC power to the filter unit.

[0178] The filtering unit is used to filter out the ripple of the first DC current to obtain a smooth DC current.

[0179] The voltage regulator unit is used to convert smooth DC power into a preset constant DC power.

[0180] In one embodiment, a microcontroller with an 8-bit microcontroller control circuit, including a key input circuit 8, a digital tube display driver circuit, and a power supply module 10, can be selected to implement the functions of the main control module 7, the key input circuit 8, the display module 9, and the power management module. The schematic diagram of this microcontroller is shown below. Figure 8 As shown, the 8-bit microcontroller control circuit is connected to the relay protection action level trigger signal input circuit, the digital tube display driver circuit, the key input circuit, and the protection device switch input position. The AC step-down rectifier filter regulator circuit is connected to the AC step-down rectifier filter regulator circuit.

[0181] In one embodiment, when the relay protection switching output device provided by the present invention is actually applied, its usage process can be as follows:

[0182] like Figure 9 As shown, the commissioning personnel can manually set the start time T1 and duration T2 of the external circuit connection. After receiving the collected relay protection action level trigger signal, the device starts counting down from the start time T1. After the countdown T1 ends, the external circuit is connected, thereby outputting the corresponding level to the corresponding switch input position. At the same time, the countdown T2 begins. After the countdown T2 ends, the external circuit is disconnected and the output level stops.

[0183] It is understood that the relay protection action level trigger signal in this embodiment corresponds to the potential signal generated when the target relay 6 operates, the start time T1 corresponds to the first duration, and the duration T2 corresponds to the second duration.

[0184] Based on the above, the present invention provides a relay protection switch output device. By setting up a key input circuit 8 and a display module 9, the output time of the relay protection switch is controllable, the human-machine interface is user-friendly, the operation is simple, and the device is easy to carry, which greatly facilitates the use by debugging personnel and solves the problems of existing relay protection switch output devices being large, inconvenient to carry, and inconvenient for on-site debugging.

[0185] In one possible implementation, this embodiment also provides an electronic device, including a processor and a memory;

[0186] The memory is used to store program code and transfer the program code to the processor;

[0187] The processor is used to execute, according to instructions in the program code, a relay protection switching quantity output method provided in any of the above embodiments.

[0188] It should be noted that the electronic device in this embodiment may include one or more of the following components: a processor, a memory, and one or more application programs, wherein the one or more application programs may be stored in the memory and configured to be executed by one or more processors, and the one or more application programs are configured to perform the method described in the above embodiment of a relay protection switching quantity output method.

[0189] A processor may include one or more processing cores. The processor connects to various parts of the electronic device using various interfaces and lines, and performs various functions and processes data by running or executing instructions, programs, code sets, or instruction sets stored in memory, and by calling data stored in memory. Optionally, the processor may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor may integrate one or a combination of several of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the displayed content; and the modem handles wireless communication. It is understood that the modem may also be implemented separately as a communication chip, without being integrated into the processor.

[0190] The memory may include random access memory (RAM) or read-only memory (ROM). The memory can be used to store instructions, programs, code, code sets, or instruction sets. The memory may include a program storage area and a data storage area. The program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as touch functionality, sound playback functionality, image playback functionality, etc.), and instructions for implementing the various method embodiments described below. The data storage area may also store data created during the use of the electronic device.

[0191] In one possible implementation, this embodiment also provides a computer program product including computer-readable code, which, when executed on a device, causes a processor in the device to execute instructions for implementing a relay protection switching quantity output method as provided in any of the above embodiments.

[0192] In one possible implementation, this embodiment also provides another computer program product for storing computer-readable instructions that, when executed, cause the computer to perform the operation of a relay protection switching quantity output method provided in any of the above embodiments.

[0193] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0194] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "a particular example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0195] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0196] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0197] Furthermore, in the various embodiments of the present invention, the functional units can be integrated into one processing unit, or each functional unit can be a separate physical entity, or two or more functional units can be integrated into one processing unit. The integrated unit described above can be implemented in hardware or as a software functional unit.

[0198] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0199] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application 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 this application described herein can be implemented, for example, 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.

[0200] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for outputting a relay protection switching quantity, characterized in that, The method includes: Acquire the potential signal of the target relay in the secondary circuit of the relay protection device; Based on the comparison result between the potential signal and the preset reference signal, it is determined whether the target relay has been activated; If so, a first countdown operation is performed for a preset first duration. After the first countdown operation ends, the relay protection switch quantity is continuously output. At the same time, a second countdown operation is performed for a preset second duration. After the second countdown operation ends, the output of the relay protection switch quantity stops.

2. The method according to claim 1, characterized in that, The continuous output relay protection switching quantity includes: The target external circuit is connected; wherein the two ends of the target external circuit are respectively connected to the positive potential terminal and the negative potential terminal of the target switch input position; When the target external circuit is turned on, the positive and negative potential terminals of the target switch input position are connected, so that the target switch input position transmits the relay protection switch quantity to the relay protection device.

3. The method according to claim 2, characterized in that, The step of stopping the output of the relay protection switching quantity includes: Disconnect the target external circuit to break the connection between the positive and negative potential terminals of the target switch input position, thereby stopping the target switch input position from transmitting relay protection switch signals to the relay protection device.

4. The method according to claim 3, characterized in that, The target relay includes a coil; The potential signal of the target relay in the secondary circuit of the relay protection device is collected, including: The potential signal on one side of the coil is acquired.

5. The method according to claim 3, characterized in that, The target relay includes contacts; The potential signal of the target relay in the secondary circuit of the relay protection device is collected, including: Collect the potential signals at both ends of the contact.

6. A relay protection switching output device, characterized in that, The output device includes: The signal input circuit is connected to the target relay and is used to acquire the potential signal of the target relay in the secondary circuit of the relay protection device. The main control module, connected to the signal input circuit, is used to determine whether the target relay has activated based on the comparison result between the potential signal and the preset reference signal; if so, it performs a first countdown operation for a preset first duration, and after the first countdown operation ends, it continuously outputs the relay protection switch quantity, and simultaneously performs a second countdown operation for a preset second duration, and after the second countdown operation ends, it stops outputting the relay protection switch quantity.

7. The apparatus according to claim 6, characterized in that, The main control module is connected to the target external circuit, and is specifically used to turn on the target external circuit after the first countdown operation ends; Wherein, the two ends of the target external circuit are respectively connected to the positive potential end and the negative potential end of the target switch input position; When the target external circuit is turned on, the positive and negative potential terminals of the target switch input position are connected, so that the target switch input position transmits the relay protection switch quantity to the relay protection device.

8. The apparatus according to claim 7, characterized in that, The main control module is specifically used to disconnect the target external circuit after the second countdown operation ends, thereby disconnecting the connection between the positive and negative potential terminals of the target switch input position, and thus stopping the target switch input position from transmitting the relay protection switch quantity to the relay protection device.

9. The apparatus according to claim 7, characterized in that, The target relay includes a coil; The signal input circuit is specifically used to acquire the potential signal on one side of the coil.

10. The apparatus according to claim 7, characterized in that, The target relay includes contacts; The signal input circuit is specifically used to collect the potential signals at both ends of the contact.

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