Non-power-cut detection method and system for three-phase current transformer, medium and equipment

Abstract

The invention discloses an uninterrupted power detection method and system for a three-phase current transformer, a medium and equipment, and the method comprises the steps: receiving an output current of a to-be-detected three-phase current transformer through collection equipment, converting the output current of the to-be-detected three-phase current transformer into an electric signal, and transmitting the electric signal to analog-to-digital conversion equipment; the analog-to-digital conversion device converts the electric signal into a discrete digital signal and stores the discrete digital signal into a storage device installed in the analog-to-digital conversion device; the single-chip microcomputer reads the discrete digital signals stored in the storage device and sends the discrete digital signals to a receiver; the receiver converts the discrete digital signal into an output current of the three-phase current transformer, and forwards the output current of the three-phase current transformer to be detected to a computer; and the computer judges whether the three-phase current transformer to be detected fails or not according to the output current of the three-phase current transformer to be detected.

Description

Technical Field

[0001] The present application relates to the technical field of three-phase current transformer calibration, and in particular to a non-stop detection method, system, medium and equipment for three-phase current transformer. Background Art

[0002] In the power system, the three-phase three-wire current transformer is an important power measurement device used to measure the current in the circuit. During production and operation and maintenance, the current transformer ratio test is required to ensure the accuracy of current measurement.

[0003] The output current of the three-phase current transformer is usually in the commonly used measurement range, such as 5A or 1A. It is widely used in current measurement, electric energy metering, protection and control in power systems. By using it in conjunction with ammeters, electric energy meters, protection relays, etc., accurate monitoring and protection of the power system can be achieved.

[0004] Although the existing technology has popularized the method of live detection of three-phase current transformers, such as the Chinese patent with publication number CN112858991B, after the primary side of the three-phase current transformer and the standard current transformer are connected in series, the two are connected in parallel to the output winding of the current booster, the input winding of the current booster is connected in parallel to the phase-shifting power supply, and the secondary sides of the three-phase current transformer and the standard current transformer are connected to the digital transformer tester. The present invention performs error verification on the three-phase current transformer according to the verification regulations under the condition of non-stop power supply of the low-voltage line, solves the problem that the current three-phase current transformer cannot be accurately measured under the condition of power supply failure of the line, solves the problem that the error situation under different current values ​​cannot be verified, and ensures the fairness of measurement.

[0005] However, these still require manual operation. Therefore, once the operator makes an error in actual operation, it may cause electric shock to people or physical damage to the equipment. Summary of the invention

[0006] In view of this, the present application provides a phase current transformer non-stop detection method and system, medium, and equipment, which can automatically perform non-stop detection on three-phase current transformers, avoiding electric shock to personnel or physical damage to equipment that may be caused by manual operation.

[0007] According to one aspect of the present application, a phase current transformer non-stop detection method is provided, the method comprising:

[0008] The acquisition device receives the output current of the three-phase current transformer to be tested, and converts the output current of the three-phase current transformer to be tested into an electrical signal and sends it to the analog-to-digital conversion device;

[0009] The analog-to-digital conversion device converts the electrical signal into a discrete digital signal, and stores the discrete digital signal in a storage device installed in the analog-to-digital conversion device;

[0010] The single chip microcomputer reads the discrete digital signal stored in the storage device and sends the discrete digital signal to a receiver;

[0011] The receiver converts the discrete digital signal into the output current of the three-phase current transformer, and forwards the output current of the three-phase current transformer to be measured to a computer;

[0012] The computer determines whether the three-phase current transformer to be tested has a fault according to the output current of the three-phase current transformer to be tested.

[0013] Optionally, the acquisition device is composed of any one of a multimeter, a multifunctional electric energy meter, a digital ground resistance tester and a power quality analyzer.

[0014] Optionally, the analog-to-digital conversion device is composed of any one of a current transmitter, a current isolation amplifier, a current-to-voltage converter, and a data acquisition system.

[0015] Optionally, a transfer interface is provided between the storage device and the single chip microcomputer;

[0016] Before the single chip microcomputer reads the discrete digital signal stored in the storage device, the method further includes:

[0017] Determine an interface signal type of the storage device to obtain a first interface signal type, wherein the interface signal type includes SATA, SAS, and NVMe;

[0018] Determine the interface signal type of the single-chip microcomputer to obtain a second interface signal type, wherein the interface signal type includes SPI, UART and I2C;

[0019] The first interface signal type is converted into the second interface signal type by using the conversion interface.

[0020] Optionally, the sending method of sending the discrete digital signal to the receiver includes a data line sending method and a wireless signal sending method;

[0021] If the discrete digital signal is sent to the receiver via the data line transmission method, the step of sending the discrete digital signal to the receiver includes:

[0022] According to the transmission requirement, the discrete digital signal is encoded to obtain an encoded digital signal;

[0023] Displaying an output interface list of the single-chip microcomputer, and determining an output interface for transmitting the encoded digital signal based on a selection operation on the output interface list, wherein the output interface list includes a general output port, a serial communication port, a serial peripheral interface, and a two-wire serial interface;

[0024] sending the encoded digital signal to the receiver via the output interface;

[0025] If the discrete digital signal is sent to the receiver by the wireless signal sending method, the step of sending the discrete digital signal to the receiver includes:

[0026] displaying a wireless communication module list, and determining a wireless communication module for sending the discrete digital signal based on a selection operation on the wireless communication module list, wherein the wireless communication module list includes a Wi-Fi module, a Bluetooth module or a Zigbee module;

[0027] The wireless communication module is connected to the single-chip microcomputer by using a physical connection of a serial communication port, and the level of the single-chip microcomputer is converted to the level of the wireless communication module by using a level conversion circuit;

[0028] According to the specifications and guidelines corresponding to the wireless communication module, the wireless network parameters of the wireless communication module are configured, wherein the wireless network parameters include SSID, password, communication frequency and communication channel;

[0029] Writing a software program for the single-chip microcomputer to enable the single-chip microcomputer to communicate with the wireless communication module, wherein the software program includes a data encoding function, a packaging function, and an unpacking function;

[0030] Encoding the discrete digital signal using the data encoding function to obtain an encoded digital signal, packaging the encoded digital signal using the packaging function to obtain a packaged digital signal, and sending the packaged digital signal to the wireless communication module;

[0031] The wireless communication module unpacks the packaged digital signal using the unpacking function to obtain the encoded digital signal, and sends the encoded digital signal to the receiver.

[0032] Optionally, the receiver converts the discrete digital signal into the output current of the three-phase current transformer, and forwards the output current of the three-phase current transformer to be measured to a computer, comprising:

[0033] The receiver decodes the encoded digital signal to obtain the discrete digital signal, and converts the discrete digital signal into the output current of the three-phase current transformer to be tested;

[0034] The output current of the three-phase current transformer to be tested is forwarded to the computer.

[0035] Optionally, encoding the discrete digital signal according to the transmission requirement to obtain the encoded digital signal includes:

[0036] Displaying a serial communication protocol list, and determining a serial communication protocol for encoding the discrete digital signal based on a selection operation on the serial communication protocol list, wherein the serial communication protocol list includes UART, SPI, and I2C;

[0037] According to the configuration requirements of the serial communication protocol, the baud rate parameter, the data bit parameter and the stop bit parameter are configured respectively to obtain a configured serial communication protocol;

[0038] The discrete digital signal is encoded according to the configured serial communication protocol to obtain the encoded digital signal.

[0039] Optionally, the computer determines whether the three-phase current transformer to be tested is faulty according to the output current of the three-phase current transformer to be tested, including:

[0040] Determining the rated current of the three-phase current transformer to be tested;

[0041] Determine whether the output current of the three-phase current transformer to be tested is less than a first preset multiple of the rated current or greater than a second preset multiple of the rated current;

[0042] If the output current of the three-phase current transformer to be tested is less than the rated current of the first preset multiple or greater than the rated current of the second preset multiple, it is determined that the three-phase current transformer to be tested has a fault;

[0043] If the output current of the three-phase current transformer to be tested is between the rated current of the first preset multiple and the rated current of the second preset multiple, it is determined that there is no fault in the three-phase current transformer to be tested.

[0044] According to another aspect of the present application, a three-phase current transformer non-power-off detection system is provided, the system comprising:

[0045] Acquisition equipment, digital-to-analog conversion equipment, single-chip microcomputers, receivers, and computers;

[0046] The acquisition device is used to receive the output current of the three-phase current transformer to be tested, and convert the output current of the three-phase current transformer to be tested into an electrical signal and send it to the analog-to-digital conversion device;

[0047] The analog-to-digital conversion device is used to convert the electrical signal into a discrete digital signal and store the discrete digital signal in a storage device installed in the analog-to-digital conversion device;

[0048] The single chip microcomputer is used to read the discrete digital signal stored in the storage device and send the discrete digital signal to a receiver;

[0049] The receiver is used to convert the discrete digital signal into the output current of the three-phase current transformer, and forward the output current of the three-phase current transformer to be measured to a computer;

[0050] The computer is used to determine whether the three-phase current transformer to be tested has a fault according to the output current of the three-phase current transformer to be tested.

[0051] Optionally, the acquisition device is composed of any one of a multimeter, a multifunctional electric energy meter, a digital ground resistance tester and a power quality analyzer.

[0052] Optionally, the analog-to-digital conversion device is composed of any one of a current transmitter, a current isolation amplifier, a current-to-voltage converter, and a data acquisition system.

[0053] Optionally, the storage device is composed of any one of a computer hard disk, a solid state drive, a flash memory card and a memory chip.

[0054] Optionally, a transfer interface is provided between the storage device and the single chip microcomputer;

[0055] Before the single chip microcomputer reads the discrete digital signal stored in the storage device, the method further includes:

[0056] Determine an interface signal type of the storage device to obtain a first interface signal type, wherein the interface signal type includes SATA, SAS, and NVMe;

[0057] Determine the interface signal type of the single-chip microcomputer to obtain a second interface signal type, wherein the interface signal type includes SPI, UART and I2C;

[0058] The first interface signal type is converted into the second interface signal type by using the conversion interface.

[0059] Optionally, the sending method of sending the discrete digital signal to the receiver includes a data line sending method and a wireless signal sending method;

[0060] If the discrete digital signal is sent to the receiver via the data line transmission method, the step of sending the discrete digital signal to the receiver includes:

[0061] According to the transmission requirement, the discrete digital signal is encoded to obtain an encoded digital signal;

[0062] Displaying an output interface list of the single-chip microcomputer, and determining an output interface for transmitting the encoded digital signal based on a selection operation on the output interface list, wherein the output interface list includes a general output port, a serial communication port, a serial peripheral interface, and a two-wire serial interface;

[0063] sending the encoded digital signal to the receiver via the output interface;

[0064] If the discrete digital signal is sent to the receiver by the wireless signal sending method, the step of sending the discrete digital signal to the receiver includes:

[0065] displaying a wireless communication module list, and determining a wireless communication module for sending the discrete digital signal based on a selection operation on the wireless communication module list, wherein the wireless communication module list includes a Wi-Fi module, a Bluetooth module or a Zigbee module;

[0066] The wireless communication module is connected to the single-chip microcomputer by using a physical connection of a serial communication port, and the level of the single-chip microcomputer is converted to the level of the wireless communication module by using a level conversion circuit;

[0067] According to the specifications and guidelines corresponding to the wireless communication module, the wireless network parameters of the wireless communication module are configured, wherein the wireless network parameters include SSID, password, communication frequency and communication channel;

[0068] Writing a software program for the single-chip microcomputer to enable the single-chip microcomputer to communicate with the wireless communication module, wherein the software program includes a data encoding function, a packaging function, and an unpacking function;

[0069] Encoding the discrete digital signal using the data encoding function to obtain an encoded digital signal, packaging the encoded digital signal using the packaging function to obtain a packaged digital signal, and sending the packaged digital signal to the wireless communication module;

[0070] The wireless communication module unpacks the packaged digital signal using the unpacking function to obtain the encoded digital signal, and sends the encoded digital signal to the receiver.

[0071] Optionally, the receiver is further used for:

[0072] The receiver decodes the encoded digital signal to obtain the discrete digital signal, and converts the discrete digital signal into the output current of the three-phase current transformer to be tested;

[0073] The output current of the three-phase current transformer to be tested is forwarded to the computer.

[0074] Optionally, the single chip microcomputer is further used for:

[0075] Displaying a serial communication protocol list, and determining a serial communication protocol for encoding the discrete digital signal based on a selection operation on the serial communication protocol list, wherein the serial communication protocol list includes UART, SPI, and I2C;

[0076] According to the configuration requirements of the serial communication protocol, the baud rate parameter, the data bit parameter and the stop bit parameter are configured respectively to obtain a configured serial communication protocol;

[0077] The discrete digital signal is encoded according to the configured serial communication protocol to obtain the encoded digital signal.

[0078] Optionally, the computer is further used for:

[0079] Determining the rated current of the three-phase current transformer to be tested;

[0080] Determine whether the output current of the three-phase current transformer to be tested is less than a first preset multiple of the rated current or greater than a second preset multiple of the rated current;

[0081] If the output current of the three-phase current transformer to be tested is less than the rated current of the first preset multiple or greater than the rated current of the second preset multiple, it is determined that the three-phase current transformer to be tested has a fault;

[0082] If the output current of the three-phase current transformer to be tested is between the rated current of the first preset multiple and the rated current of the second preset multiple, it is determined that there is no fault in the three-phase current transformer to be tested.

[0083] According to another aspect of the present application, a storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, the above-mentioned three-phase current transformer non-power-off detection method is implemented.

[0084] According to another aspect of the present application, a computer device is provided, including a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, wherein the processor implements the above-mentioned three-phase current transformer non-power-off detection method when executing the program.

[0085] By means of the above technical scheme, the present application provides a method and system, medium, and device for detecting a three-phase current transformer without power outage. First, the acquisition device receives the output current of the three-phase current transformer to be tested, and converts the output current of the three-phase current transformer to be tested into an electrical signal and sends it to the analog-to-digital conversion device. Then, the analog-to-digital conversion device converts the electrical signal into a discrete digital signal, and stores the discrete digital signal in a storage device installed in the analog-to-digital conversion device. The single-chip microcomputer reads the discrete digital signal stored in the storage device and sends the discrete digital signal to the receiver. The receiver converts the discrete digital signal into the output current of the three-phase current transformer, and forwards the output current of the three-phase current transformer to be tested to the computer. Finally, the computer determines whether the three-phase current transformer to be tested is faulty according to the output current of the three-phase current transformer to be tested. Thus, automatic detection of the three-phase current transformer without power outage is realized, avoiding the situation where electric shock to personnel or physical damage to equipment may be caused by manual operation.

[0086] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0088] Figure 1 A schematic flow chart of a non-power-off detection method for a three-phase current transformer provided in an embodiment of the present application is shown;

[0089] Figure 2 A schematic flow chart of another non-power-off detection method for a three-phase current transformer provided in an embodiment of the present application is shown;

[0090] Figure 3 A schematic structural diagram of a three-phase current transformer non-stop power detection system provided in an embodiment of the present application is shown;

[0091] Figure 4 A schematic diagram of the device structure of a computer device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0092] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0093] In this embodiment, a three-phase current transformer non-stop detection method is provided. Figure 1 As shown, the method includes:

[0094] Step 101: a collection device receives an output current of a three-phase current transformer to be tested, and converts the output current of the three-phase current transformer to be tested into an electrical signal and sends it to an analog-to-digital conversion device.

[0095] The non-power-off detection method for three-phase current transformer provided in the embodiment of the present application can accurately detect whether there is a fault in the three-phase current transformer to be tested. In the embodiment of the present application, the output end of the three-phase current transformer to be tested is connected to the wire and connected to the acquisition device, and the acquisition device can receive the output current of the three-phase current transformer to be tested, and after converting the output current of the three-phase current transformer to be tested into an electrical signal, the electrical signal is sent to the analog-to-digital conversion device connected to the acquisition device.

[0096] Step 102: The analog-to-digital conversion device converts the electrical signal into a discrete digital signal, and stores the discrete digital signal in a storage device installed in the analog-to-digital conversion device.

[0097] In this embodiment, the analog-to-digital conversion device can receive the electrical signal sent by the acquisition device and convert the electrical signal into a discrete digital signal, that is, represent and process the electrical signal in digital form. After converting the electrical signal into a discrete digital signal, the analog-to-digital conversion device can send the discrete digital signal to a storage device for storage.

[0098] Step 103: The single chip microcomputer reads the discrete digital signal stored in the storage device and sends the discrete digital signal to a receiver.

[0099] In this embodiment, the storage device is connected to the single-chip microcomputer. When the analog-to-digital conversion device sends the discrete digital signal to the storage device for storage, the single-chip microcomputer can read the discrete digital signal in the storage device and send the read discrete digital signal to the receiver for processing by the receiver.

[0100] Step 104: the receiver converts the discrete digital signal into the output current of the three-phase current transformer, and forwards the output current of the three-phase current transformer to be measured to a computer.

[0101] In this embodiment, the receiver receives the discrete digital signal sent by the single chip microcomputer, and can convert the discrete digital signal to restore the original output current of the three-phase current transformer to be tested, and forward the output current of the three-phase current transformer to be tested to the computer.

[0102] Step 105: the computer determines whether the three-phase current transformer to be tested is faulty according to the output current of the three-phase current transformer to be tested.

[0103] In this embodiment, the computer can receive the output current of the three-phase current transformer to be tested sent by the receiver, so as to determine whether the three-phase current transformer to be tested is faulty according to the output current of the three-phase current transformer to be tested.

[0104] By applying the technical solution of this embodiment, the output current of the three-phase current transformer to be tested is received by the acquisition device, and the output current of the three-phase current transformer to be tested is converted into an electrical signal and sent to the analog-to-digital conversion device. The analog-to-digital conversion device converts the received electrical signal into a discrete digital signal and sends it to the storage device for storage. The single-chip microcomputer reads the discrete digital signal in the storage device and sends the read discrete digital signal to the receiver. The receiver restores the received discrete digital signal to the original output current of the three-phase current transformer to be tested and forwards it to the computer. The computer determines whether the three-phase current transformer to be tested is faulty based on the received output current of the three-phase current transformer to be tested. Thereby, automatic non-power-off detection of the three-phase current transformer is realized, avoiding the situation where electric shock to personnel or physical damage to equipment may be caused by manual operation.

[0105] Further, as a refinement and expansion of the specific implementation of the above embodiment, in order to fully illustrate the specific implementation process of this embodiment, another non-stop power detection method for three-phase current transformer is provided, such as Figure 2 As shown, the method includes:

[0106] Step 201: a collection device receives an output current of a three-phase current transformer to be tested, and converts the output current of the three-phase current transformer to be tested into an electrical signal and sends it to an analog-to-digital conversion device.

[0107] Optionally, in step 201, the acquisition device is composed of any one of a multimeter, a multi-function electric energy meter, a digital ground resistance tester and a power quality analyzer.

[0108] In an embodiment of the present application, the output end of the three-phase current transformer to be tested is connected to an electric wire and connected to a collection device. The collection device can receive the output current of the three-phase current transformer to be tested, and after converting the output current of the three-phase current transformer to be tested into an electrical signal, the electrical signal is sent to an analog-to-digital conversion device connected to the collection device so that the analog-to-digital conversion device converts the electrical signal. The collection device can be any one of a multimeter, a multi-function electric energy meter, a digital ground resistance tester, and a power quality analyzer.

[0109] Step 202: The analog-to-digital conversion device converts the electrical signal into a discrete digital signal, and stores the discrete digital signal in a storage device installed in the analog-to-digital conversion device.

[0110] Optionally, in step 202, the analog-to-digital conversion device is composed of any one of a current transmitter, a current isolation amplifier, a current-to-voltage converter, and a data acquisition system.

[0111] Optionally, in step 202, the storage device is composed of any one of a computer hard disk, a solid state drive, a flash memory card, and a memory chip.

[0112] In this embodiment, the analog-to-digital conversion device can receive the electrical signal sent by the acquisition device and convert the electrical signal into a discrete digital signal, that is, represent and process the electrical signal in digital form. After converting the electrical signal into a discrete digital signal, the analog-to-digital conversion device can send the discrete digital signal to a storage device installed in the analog-to-digital conversion device for storage, wherein the analog-to-digital conversion device can be any one of a current transmitter, a current isolation amplifier, a current-to-voltage converter, and a data acquisition system, and the storage device installed in the analog-to-digital conversion device can be any one of a computer hard disk, a solid-state hard disk, a flash memory card, and a memory chip.

[0113] Step 203, determine the interface signal type of the storage device to obtain a first interface signal type, wherein the interface signal type includes SATA, SAS and NVMe.

[0114] Step 204, determining the interface signal type of the single chip microcomputer to obtain a second interface signal type, wherein the interface signal type includes SPI, UART and I2C.

[0115] Step 205: Use the conversion interface to convert the first interface signal type into the second interface signal type.

[0116] In this embodiment, in order to facilitate the subsequent single-chip microcomputer to read the discrete digital signals in the storage device, a transfer interface is set between the storage device and the single-chip microcomputer. First, the interface signal type of the storage device is determined to obtain a first interface signal type, wherein the interface signal type of the storage device includes SATA, SAS and NVMe. For example, if the interface signal type of the storage device is determined to be SATA, the first interface signal type is SATA. Secondly, the interface signal type of the single-chip microcomputer is determined to obtain a second interface signal type, wherein the interface signal type of the single-chip microcomputer includes SPI, UART and I2C. For example, if the interface signal type of the single-chip microcomputer is confirmed to be SPI, the second interface signal type is SPI. After respectively determining the first interface signal type and the second interface signal type, the first interface signal type is converted to the second interface signal type using the transfer interface. For example, if the first interface signal type is SATA and the second interface signal type is SPI, the first interface signal type SATA is converted to the second interface signal type SPI using the transfer interface.

[0117] Step 206: The single chip microcomputer reads the discrete digital signal stored in the storage device and sends the discrete digital signal to a receiver.

[0118] Optionally, in step 206, the sending method of sending the discrete digital signal to the receiver includes a wireless signal sending method and a data line sending method;

[0119] If the discrete digital signal is sent to the receiver via the data line transmission method, the step of sending the discrete digital signal to the receiver includes:

[0120] According to the transmission requirement, the discrete digital signal is encoded to obtain an encoded digital signal;

[0121] Displaying an output interface list of the single-chip microcomputer, and determining an output interface for transmitting the encoded digital signal based on a selection operation on the output interface list, wherein the output interface list includes a general output port, a serial communication port, a serial peripheral interface, and a two-wire serial interface;

[0122] sending the encoded digital signal to the receiver via the output interface;

[0123] If the discrete digital signal is sent to the receiver by the wireless signal sending method, the step of sending the discrete digital signal to the receiver includes:

[0124] displaying a wireless communication module list, and determining a wireless communication module for sending the discrete digital signal based on a selection operation on the wireless communication module list, wherein the wireless communication module list includes a Wi-Fi module, a Bluetooth module or a Zigbee module;

[0125] The wireless communication module is connected to the single-chip microcomputer by using a physical connection of a serial communication port, and the level of the single-chip microcomputer is converted to the level of the wireless communication module by using a level conversion circuit;

[0126] According to the specifications and guidelines corresponding to the wireless communication module, the wireless network parameters of the wireless communication module are configured, wherein the wireless network parameters include SSID, password, communication frequency and communication channel;

[0127] Writing a software program for the single-chip microcomputer to enable the single-chip microcomputer to communicate with the wireless communication module, wherein the software program includes a data encoding function, a packaging function, and an unpacking function;

[0128] Encoding the discrete digital signal using the data encoding function to obtain an encoded digital signal, packaging the encoded digital signal using the packaging function to obtain a packaged digital signal, and sending the packaged digital signal to the wireless communication module;

[0129] The wireless communication module unpacks the packaged digital signal using the unpacking function to obtain the encoded digital signal, and sends the encoded digital signal to the receiver.

[0130] Optionally, step 206 further includes: displaying a serial communication protocol list, and determining a serial communication protocol for encoding the discrete digital signal based on a selection operation on the serial communication protocol list, wherein the serial communication protocol list includes UART, SPI, and I2C;

[0131] According to the configuration requirements of the serial communication protocol, the baud rate parameter, the data bit parameter and the stop bit parameter are configured respectively to obtain a configured serial communication protocol;

[0132] The discrete digital signal is encoded according to the configured serial communication protocol to obtain the encoded digital signal.

[0133] In this embodiment, after converting the first transfer interface signal type to the second interface signal type, the single-chip microcomputer can read the discrete digital signal in the storage device and send the read discrete digital signal to the receiver. Specifically, the single-chip microcomputer can send the read discrete digital signal to the receiver through a data line transmission mode or a wireless signal transmission mode. If it is sent by a data line transmission mode, first, according to the transmission requirements, a serial communication protocol for encoding discrete digital signals is selected in the serial communication protocol list, for example, the selected serial communication protocol is UART. Subsequently, according to the configuration requirements of the selected serial communication protocol, the baud rate parameters, data bit parameters and stop bit parameters of the serial communication protocol are configured to obtain the configured serial communication protocol, and then, according to the configured serial communication protocol, the discrete digital signal is encoded, and finally, the encoded digital signal is sent to the receiver through an appropriate single-chip microcomputer output interface. If it is sent by a wireless signal transmission mode, first, a wireless communication module for sending discrete digital signals is selected in the wireless communication module list, for example, the selected wireless communication module is a Wi-Fi module. Subsequently, the selected wireless communication module is connected to the single-chip microcomputer by means of a physical connection of a serial communication port, and the level of the single-chip microcomputer is converted to the level of the wireless communication module by means of a level conversion circuit to ensure that the signal can be transmitted correctly. Then, the wireless network parameters of the wireless communication module are configured. Then, a software program for the single-chip microcomputer is written so that the single-chip microcomputer communicates with the wireless communication module, wherein the written software program includes a data encoding function, a packaging function, and an unpacking function. Then, the discrete digital signal is encoded by means of the data encoding function of the software program, and the encoded digital signal is packaged by means of the packaging function, and the packaged digital signal is sent to the wireless communication module. Finally, the wireless communication module unpacks the received packaged digital signal by means of the unpacking function, and sends the unpacked digital signal, i.e., the encoded digital signal, to the receiver via the wireless network.

[0134] Step 207: The receiver converts the discrete digital signal into the output current of the three-phase current transformer, and forwards the output current of the three-phase current transformer to be measured to a computer.

[0135] Optionally, step 207 includes: the receiver decodes the encoded digital signal to obtain the discrete digital signal, and converts the discrete digital signal into the output current of the three-phase current transformer to be tested;

[0136] The output current of the three-phase current transformer to be tested is forwarded to the computer.

[0137] In this embodiment, the receiver can restore the received discrete digital signal to the original output current of the three-phase current transformer to be tested, and forward the restored original output current of the three-phase current transformer to be tested to the computer, so that the computer can determine whether the three-phase current transformer to be tested has a fault. Specifically, whether the single-chip microcomputer sends the discrete digital signal to the receiver through a data line transmission method or a wireless signal transmission method, it is a coded digital signal sent. Therefore, when the receiver receives the coded digital signal, it can decode it and convert the decoded digital signal, that is, the discrete digital signal, into the output current of the three-phase current transformer to be tested, that is, restore it to the original output current of the three-phase current transformer to be tested. Then the output current of the three-phase current transformer to be tested is forwarded to the computer.

[0138] Step 208: The computer determines whether the three-phase current transformer to be tested is faulty according to the output current of the three-phase current transformer to be tested.

[0139] Optionally, step 208 includes: determining the rated current of the three-phase current transformer to be tested;

[0140] Determine whether the output current of the three-phase current transformer to be tested is less than a first preset multiple of the rated current or greater than a second preset multiple of the rated current;

[0141] If the output current of the three-phase current transformer to be tested is less than the rated current of the first preset multiple or greater than the rated current of the second preset multiple, it is determined that the three-phase current transformer to be tested has a fault;

[0142] If the output current of the three-phase current transformer to be tested is between the rated current of the first preset multiple and the rated current of the second preset multiple, it is determined that there is no fault in the three-phase current transformer to be tested.

[0143] In this embodiment, after the computer receives the output current of the three-phase current transformer to be tested sent by the receiver, it determines whether the three-phase current transformer to be tested has a fault according to the output current of the three-phase current transformer to be tested. Specifically, the rated current of the three-phase current transformer to be tested is first determined, and then the rated current of the first preset multiple is determined, that is, the product of the first preset multiple and the rated current of the three-phase current transformer to be tested is calculated, and then the rated current of the second preset multiple is determined, that is, the product of the second preset multiple and the rated current of the three-phase current transformer to be tested. Then, it is determined whether the output current of the three-phase current transformer to be tested is less than the rated current of the first preset multiple or greater than the rated current of the second preset multiple. If the output current of the three-phase current transformer to be tested is less than the rated current of the first preset multiple or greater than the rated current of the second preset multiple, it is determined that the three-phase current transformer to be tested has a fault. On the contrary, if the output current of the three-phase current transformer to be tested is between the rated current of the first preset multiple and the rated current of the second preset multiple, it is determined that the three-phase current transformer to be tested does not have a fault. If the conversion ratio of the three-phase current transformer to be tested is 100:5, and the output digital signal range is 0-5V, and the rated current is 100A, then determine whether the output current I of the three-phase current transformer to be tested is less than 0.95 times the rated current I rat Or greater than 1.05 times the rated current I rat , that is, whether the following formula (1) is satisfied, if the output current I of the three-phase current transformer is less than 0.95 times the rated current I rat Or greater than 1.05 times the rated current I rat , that is, if the following formula (1) is satisfied, it is determined that the three-phase current transformer to be tested has a fault, and the output result μ of formula (1) is 0.

[0144] I<0.95*I rat orI>1.05*I rat (1)

[0145] Where, I represents the output current of the three-phase current transformer to be measured, I rat Indicates the rated current of the three-phase current transformer to be tested.

[0146] On the contrary, if the output current I of the three-phase current transformer is 0.95 times the rated current I rat and 1.05 times the rated current I rat That is, if the following formula (2) is satisfied, it is determined that there is no fault in the three-phase current transformer to be tested, and the output result μ of formula (2) is 1.

[0147] I≥0.95*I rat And I≤1.05*I rat (2)

[0148] By applying the technical solution of this embodiment, the output current of the three-phase current transformer to be tested is received by the acquisition device, and the output current of the three-phase current transformer to be tested is converted into an electrical signal and sent to the analog-to-digital conversion device. The analog-to-digital conversion device converts the received electrical signal into a discrete digital signal and sends it to the storage device for storage. A transfer interface is set between the storage device and the single-chip microcomputer, and after the storage device interface signal type is converted into the single-chip microcomputer interface signal type, the single-chip microcomputer is used to read the discrete digital signal in the storage device, and the read discrete digital signal is sent to the receiver via a wireless signal or a data line. The receiver restores the received discrete digital signal to the original output current of the three-phase current transformer to be tested and forwards it to the computer. The computer determines whether the three-phase current transformer to be tested is faulty based on the received output current of the three-phase current transformer to be tested. Thereby, automatic non-stop detection of the three-phase current transformer is realized, avoiding the situation that electric shock to personnel or physical damage to the equipment may be caused by manual operation, and improving the detection efficiency of the three-phase current transformer.

[0149] Further, as Figure 1 The specific implementation of the method, the embodiment of the present application provides a phase current transformer non-stop detection system, such as Figure 3 As shown, the system includes:

[0150] Acquisition equipment, digital-to-analog conversion equipment, single-chip microcomputers, receivers, and computers;

[0151] The acquisition device is used to receive the output current of the three-phase current transformer to be tested, and convert the output current of the three-phase current transformer to be tested into an electrical signal and send it to the analog-to-digital conversion device;

[0152] The analog-to-digital conversion device is used to convert the electrical signal into a discrete digital signal and store the discrete digital signal in a storage device installed in the analog-to-digital conversion device;

[0153] The single chip microcomputer is used to read the discrete digital signal stored in the storage device and send the discrete digital signal to a receiver;

[0154] The receiver is used to convert the discrete digital signal into the output current of the three-phase current transformer, and forward the output current of the three-phase current transformer to be measured to a computer;

[0155] The computer is used to determine whether the three-phase current transformer to be tested has a fault according to the output current of the three-phase current transformer to be tested.

[0156] Optionally, the acquisition device is composed of any one of a multimeter, a multifunctional electric energy meter, a digital ground resistance tester and a power quality analyzer.

[0157] Optionally, the analog-to-digital conversion device is composed of any one of a current transmitter, a current isolation amplifier, a current-to-voltage converter, and a data acquisition system.

[0158] Optionally, the storage device is composed of any one of a computer hard disk, a solid state drive, a flash memory card and a memory chip.

[0159] Optionally, a transfer interface is provided between the storage device and the single chip microcomputer;

[0160] Before the single chip microcomputer reads the discrete digital signal stored in the storage device, the method further includes:

[0161] Determine an interface signal type of the storage device to obtain a first interface signal type, wherein the interface signal type includes SATA, SAS, and NVMe;

[0162] Determine the interface signal type of the single-chip microcomputer to obtain a second interface signal type, wherein the interface signal type includes SPI, UART and I2C;

[0163] The first interface signal type is converted into the second interface signal type by using the conversion interface.

[0164] Optionally, the sending method of sending the discrete digital signal to the receiver includes a data line sending method and a wireless signal sending method;

[0165] If the discrete digital signal is sent to the receiver via the data line transmission method, the step of sending the discrete digital signal to the receiver includes:

[0166] According to the transmission requirement, the discrete digital signal is encoded to obtain an encoded digital signal;

[0167] Displaying an output interface list of the single-chip microcomputer, and determining an output interface for transmitting the encoded digital signal based on a selection operation on the output interface list, wherein the output interface list includes a general output port, a serial communication port, a serial peripheral interface, and a two-wire serial interface;

[0168] sending the encoded digital signal to the receiver via the output interface;

[0169] If the discrete digital signal is sent to the receiver by the wireless signal sending method, the step of sending the discrete digital signal to the receiver includes:

[0170] displaying a wireless communication module list, and determining a wireless communication module for sending the discrete digital signal based on a selection operation on the wireless communication module list, wherein the wireless communication module list includes a Wi-Fi module, a Bluetooth module or a Zigbee module;

[0171] The wireless communication module is connected to the single-chip microcomputer by using a physical connection of a serial communication port, and the level of the single-chip microcomputer is converted to the level of the wireless communication module by using a level conversion circuit;

[0172] According to the specifications and guidelines corresponding to the wireless communication module, the wireless network parameters of the wireless communication module are configured, wherein the wireless network parameters include SSID, password, communication frequency and communication channel;

[0173] Writing a software program for the single-chip microcomputer to enable the single-chip microcomputer to communicate with the wireless communication module, wherein the software program includes a data encoding function, a packaging function, and an unpacking function;

[0174] Encoding the discrete digital signal using the data encoding function to obtain an encoded digital signal, packaging the encoded digital signal using the packaging function to obtain a packaged digital signal, and sending the packaged digital signal to the wireless communication module;

[0175] The wireless communication module unpacks the packaged digital signal using the unpacking function to obtain the encoded digital signal, and sends the encoded digital signal to the receiver.

[0176] Optionally, the receiver is further used for:

[0177] The receiver decodes the encoded digital signal to obtain the discrete digital signal, and converts the discrete digital signal into the output current of the three-phase current transformer to be tested;

[0178] The output current of the three-phase current transformer to be tested is forwarded to the computer.

[0179] Optionally, the single chip microcomputer is further used for:

[0180] Displaying a serial communication protocol list, and determining a serial communication protocol for encoding the discrete digital signal based on a selection operation on the serial communication protocol list, wherein the serial communication protocol list includes UART, SPI, and I2C;

[0181] According to the configuration requirements of the serial communication protocol, the baud rate parameter, the data bit parameter and the stop bit parameter are configured respectively to obtain a configured serial communication protocol;

[0182] The discrete digital signal is encoded according to the configured serial communication protocol to obtain the encoded digital signal.

[0183] Optionally, the computer is further used for:

[0184] Determining the rated current of the three-phase current transformer to be tested;

[0185] Determine whether the output current of the three-phase current transformer to be tested is less than a first preset multiple of the rated current or greater than a second preset multiple of the rated current;

[0186] If the output current of the three-phase current transformer to be tested is less than the rated current of the first preset multiple or greater than the rated current of the second preset multiple, it is determined that the three-phase current transformer to be tested has a fault;

[0187] If the output current of the three-phase current transformer to be tested is between the rated current of the first preset multiple and the rated current of the second preset multiple, it is determined that there is no fault in the three-phase current transformer to be tested.

[0188] According to another aspect of the present application, a storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, the above-mentioned three-phase current transformer non-power-off detection method is implemented.

[0189] It should be noted that other corresponding descriptions of the functional units involved in the non-stop power detection of a three-phase current transformer provided in the embodiment of the present application can be referred to. Figure 1 to Figure 2 The corresponding description in the method will not be repeated here.

[0190] Based on the above Figure 1 to Figure 2 The method shown in the embodiment of the present application accordingly provides a storage medium on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned Figure 1 to Figure 2 The three-phase current transformer non-stop detection method shown.

[0191] The present application also provides a computer device, which may be a personal computer, a server, a network device, etc. Figure 4As shown, the computer device includes a bus, a processor, a memory and a communication interface, and may also include an input and output interface and a display device. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store location information. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, the steps in each method embodiment are implemented.

[0192] Those skilled in the art will understand that Figure 4 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0193] In one embodiment, a computer-readable storage medium is provided. The computer-readable storage medium may be non-volatile or volatile, and stores a computer program thereon. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0194] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0195] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0196] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0197] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0198] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A three-phase current transformer non-stop detection method, characterized in that: include: The acquisition device receives the output current of the three-phase current transformer to be tested, and converts the output current of the three-phase current transformer to be tested into an electrical signal and sends it to the analog-to-digital conversion device; The analog-to-digital conversion device converts the electrical signal into a discrete digital signal, and stores the discrete digital signal in a storage device installed in the analog-to-digital conversion device; The single chip microcomputer reads the discrete digital signal stored in the storage device and sends the discrete digital signal to a receiver; The receiver converts the discrete digital signal into the output current of the three-phase current transformer, and forwards the output current of the three-phase current transformer to be measured to a computer; The computer determines whether the three-phase current transformer to be tested has a fault according to the output current of the three-phase current transformer to be tested.

2. The method according to claim 1, characterized in that The acquisition equipment is composed of any one of a multimeter, a multifunctional electric energy meter, a digital ground resistance tester and a power quality analyzer.

3. The method according to claim 1, characterized in that The analog-to-digital conversion device is composed of any one of a current transmitter, a current isolation amplifier, a current-to-voltage converter, and a data acquisition system.

4. The method according to claim 1, characterized in that: The storage device is composed of any one of a computer hard disk, a solid state hard disk, a flash memory card and a memory chip.

5. The method according to claim 1, characterized in that A transfer interface is provided between the storage device and the single chip microcomputer; Before the single chip microcomputer reads the discrete digital signal stored in the storage device, the method further includes: Determine an interface signal type of the storage device to obtain a first interface signal type, wherein the interface signal type includes SATA, SAS, and NVMe; Determine the interface signal type of the single-chip microcomputer to obtain a second interface signal type, wherein the interface signal type includes SPI, UART and I2C; The first interface signal type is converted into the second interface signal type by using the conversion interface.

6. The method according to claim 1, characterized in that The sending method of sending the discrete digital signal to the receiver includes a data line sending method and a wireless signal sending method; If the discrete digital signal is sent to the receiver via the data line transmission method, the step of sending the discrete digital signal to the receiver includes: According to the transmission requirement, the discrete digital signal is encoded to obtain an encoded digital signal; Displaying an output interface list of the single-chip microcomputer, and determining an output interface for transmitting the encoded digital signal based on a selection operation on the output interface list, wherein the output interface list includes a general output port, a serial communication port, a serial peripheral interface, and a two-wire serial interface; sending the encoded digital signal to the receiver via the output interface; If the discrete digital signal is sent to the receiver by the wireless signal sending method, the step of sending the discrete digital signal to the receiver includes: displaying a wireless communication module list, and determining a wireless communication module for sending the discrete digital signal based on a selection operation on the wireless communication module list, wherein the wireless communication module list includes a Wi-Fi module, a Bluetooth module or a Zigbee module; The wireless communication module is connected to the single-chip microcomputer by using a physical connection of a serial communication port, and the level of the single-chip microcomputer is converted to the level of the wireless communication module by using a level conversion circuit; According to the specifications and guidelines corresponding to the wireless communication module, the wireless network parameters of the wireless communication module are configured, wherein the wireless network parameters include SSID, password, communication frequency and communication channel; Writing a software program for the single-chip microcomputer to enable the single-chip microcomputer to communicate with the wireless communication module, wherein the software program includes a data encoding function, a packaging function, and an unpacking function; Encoding the discrete digital signal using the data encoding function to obtain an encoded digital signal, packaging the encoded digital signal using the packaging function to obtain a packaged digital signal, and sending the packaged digital signal to the wireless communication module; The wireless communication module unpacks the packaged digital signal using the unpacking function to obtain the encoded digital signal, and sends the encoded digital signal to the receiver.

7. The method according to claim 6, characterized in that The receiver converts the discrete digital signal into the output current of the three-phase current transformer, and forwards the output current of the three-phase current transformer to be measured to a computer, including: The receiver decodes the encoded digital signal to obtain the discrete digital signal, and converts the discrete digital signal into the output current of the three-phase current transformer to be tested; The output current of the three-phase current transformer to be tested is forwarded to the computer.

8. The method according to claim 6, characterized in that The step of encoding the discrete digital signal according to the transmission requirement to obtain the encoded digital signal comprises: Displaying a serial communication protocol list, and determining a serial communication protocol for encoding the discrete digital signal based on a selection operation on the serial communication protocol list, wherein the serial communication protocol list includes UART, SPI, and I2C; According to the configuration requirements of the serial communication protocol, the baud rate parameter, the data bit parameter and the stop bit parameter are configured respectively to obtain a configured serial communication protocol; The discrete digital signal is encoded according to the configured serial communication protocol to obtain the encoded digital signal.

9. The method according to claim 1, characterized in that: The computer determines whether the three-phase current transformer to be tested is faulty according to the output current of the three-phase current transformer to be tested, including: Determining the rated current of the three-phase current transformer to be tested; Determine whether the output current of the three-phase current transformer to be tested is less than a first preset multiple of the rated current or greater than a second preset multiple of the rated current; If the output current of the three-phase current transformer to be tested is less than the rated current of the first preset multiple or greater than the rated current of the second preset multiple, it is determined that the three-phase current transformer to be tested has a fault; If the output current of the three-phase current transformer to be tested is between the rated current of the first preset multiple and the rated current of the second preset multiple, it is determined that there is no fault in the three-phase current transformer to be tested.

10. A three-phase current transformer non-stop detection system, characterized in that: The system comprises: Acquisition equipment, digital-to-analog conversion equipment, single-chip microcomputers, receivers, and computers; The acquisition device is used to receive the output current of the three-phase current transformer to be tested, and convert the output current of the three-phase current transformer to be tested into an electrical signal and send it to the analog-to-digital conversion device; The analog-to-digital conversion device is used to convert the electrical signal into a discrete digital signal and store the discrete digital signal in a storage device installed in the analog-to-digital conversion device; The single chip microcomputer is used to read the discrete digital signal stored in the storage device and send the discrete digital signal to a receiver; The receiver is used to convert the discrete digital signal into the output current of the three-phase current transformer, and forward the output current of the three-phase current transformer to be measured to a computer; The computer is used to determine whether the three-phase current transformer to be tested has a fault according to the output current of the three-phase current transformer to be tested.

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