Multifunctional configurable electronic transformer data acquisition and remote upgrading device

Abstract

The invention relates to the technical field of electric power systems, and provides a multifunctional configurable electronic transformer data acquisition and remote upgrading device, which comprises a data acquisition module, a remote upgrading module and a remote upgrading module, and is characterized in that the data acquisition module performs device input terminal signal open-circuit fault judgment according to the type of a voltage signal; the data acquisition module reads rated delay time parameters and output configuration information of the device from a user storage area of the memory in the main control chip, and organizes and packs data of the rated delay time parameters, digital signals and input terminal open circuit discrimination state information according to the output configuration information; outputting the packed data through a specified hardware port of the device; and the remote program upgrading function module is used for judging whether the program needs to be upgraded remotely according to the program in the program storage A area of the main control chip operated by the device, and writing new program data into the program storage B area of the main control chip and loading and operating the new program data when the program needs to be upgraded, so that remote upgrading is realized. The delay time of the device can be configured, online program upgrading is supported, and the maintenance operation cost is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a multifunctional configurable electronic transformer data acquisition and remote upgrading device. Background Art

[0002] With the development of smart grids, electronic instrument transformers (ETTs) have become widely used in power systems. However, statistical analysis has revealed that the output data formats of the EIT acquisition units currently in use vary. This diverse data format makes interoperability between devices from different eras challenging, creating significant challenges for substation equipment upgrades. For example, when upgrading line bay protection equipment, a common solution is to lower the equipment's protection level and suspend protection functions that require bus voltage data across bays. This involves temporarily disabling backup protection for the upgraded bays and enabling only differential protection for the upgraded bays. After all bus voltage-related line bays have been upgraded to the new equipment, the protection level is increased and backup protection functions are restored. This approach undoubtedly increases the risk of damage from failures in primary grid equipment.

[0003] Different types of electronic instrument transformers exhibit varying delays when converting analog data acquisition to digital output. Consequently, equipment manufacturers must develop corresponding acquisition unit software versions for each type of electronic instrument transformer. These varying rated delays for each type of electronic instrument transformer lead to numerous software version changes, undoubtedly increasing equipment maintenance costs for both manufacturers and users.

[0004] The electronic instrument transformer data acquisition device is installed on the primary equipment side, which makes upgrading it costly and complex. Specifically, when the data acquisition device's software program needs to be upgraded, workers must work at height, dismantle the electronic instrument transformer's housing, and completely replace the acquisition unit module. This operation not only involves high equipment costs but also significantly increases labor costs.

[0005] During actual operation, electronic instrument transformers may experience poor terminal contact or other abnormalities, leading to an open sampling circuit and, in turn, affecting the stable operation of the power system. In existing technologies, when an open circuit occurs in an electronic instrument transformer, data acquisition devices often fail to detect and report the fault in a timely manner, increasing the risk of false activation of rapid protection devices. Summary of the Invention

[0006] The purpose of the present invention is to solve at least one technical problem in the background technology and provide a multifunctional configurable electronic transformer data acquisition and remote upgrade device.

[0007] To achieve the above objectives, the present invention provides a multifunctional configurable electronic transformer data acquisition and remote upgrade device, comprising:

[0008] The data acquisition module collects the secondary output voltage signal of the electronic transformer, converts the voltage signal into a digital signal through a filter circuit and an analog-to-digital conversion chip, determines the type of the original voltage signal at the input terminal based on the digital voltage signal, and performs open circuit determination of the input terminal signal based on the type of the original voltage signal;

[0009] The data acquisition module reads the rated delay time parameters and output configuration information of the device from the user storage area of the on-chip memory of the main control chip, then organizes the rated delay time parameters, digital signals and input terminal open circuit judgment status information into packaged data according to the output configuration information, and then outputs the packaged data through the designated hardware port of the device;

[0010] The remote program upgrade module uses a dual storage partition mechanism to implement updates. The system runs the program from the main storage area A by default. First, it monitors the upgrade instructions in real time through the fiber optic Ethernet port. When a legitimate upgrade request is detected, the system automatically receives and parses the data message, and writes the new version of the program that has passed the integrity check into the backup storage area B. After the data is written, the program loading area is set to the backup storage area B, triggering a soft reset restart. After the system restarts, the program in the backup storage area B is automatically loaded, and the main storage area A is converted to the backup storage area to achieve remote upgrade.

[0011] According to one aspect of the present invention, the data acquisition module includes:

[0012] The data identification submodule determines whether the voltage signal is an AC periodic signal or a DC non-periodic signal according to formula (2). If the voltage signal is an AC periodic signal, it is determined that there is no open circuit fault at the input terminal of the device; if the voltage signal is a DC non-periodic signal, it is determined that there is an open circuit fault at the input terminal of the device.

[0013] The voltage signal type needs to be determined based on a continuous sampling data point, the number of which is N.

[0014] The sampling frequency of the system voltage signal is f; for a voltage signal with a frequency of 50Hz, 10 cycles are taken as a data segment for judgment;

[0015] The calculation formula for N is:

[0016] Take the average of N consecutive sampling data. If the average is less than the empirical constant C, the voltage signal is judged to be an AC periodic signal, otherwise it is judged to be a DC non-periodic signal.

[0017] The calculation formula of the judgment process is:

[0018]

[0019] Among them, x i Sampling point value; i sampling point sequence; C empirical threshold constant;

[0020] When the sampled data is a 16-bit signed fixed-point number, the value of C is set to 11585 based on the experimental experience data of the terminal open circuit.

[0021] According to one aspect of the present invention, the data acquisition module includes:

[0022] A data reading submodule reads the rated delay time parameters and output configuration information of the device from the user storage area of the on-chip memory of the main control chip;

[0023] The data packaging submodule organizes the read rated delay time parameters, voltage signals and input terminal signal open circuit judgment information into packaged data according to the output configuration information, and then outputs the packaged data through the specified hardware port of the device.

[0024] According to one aspect of the present invention, the output configuration information includes: hardware output port type and output protocol information;

[0025] The hardware output port type includes two groups of optical fiber data output ports, one group is a serial data single-transmit optical fiber interface, and the other group is an Ethernet bidirectional optical fiber interface.

[0026] According to one aspect of the present invention, the remote program upgrade function module includes:

[0027] The remote upgrade program judgment submodule queries the fiber optic Ethernet port receiving message information to determine whether a remote program upgrade is required. If a remote program upgrade is not required, the submodule continues to query the fiber optic Ethernet port receiving message information. If a remote program upgrade is required, the submodule receives new program data in the fiber optic Ethernet port message information.

[0028] According to one aspect of the present invention, the remote program upgrade function module includes:

[0029] The new program writing and loading submodule receives new program data and writes the new program data into the backup storage area B of the main control chip. After the new program data is written and stored, the program loading area is set to storage area B.

[0030] According to one aspect of the present invention, the remote program upgrade function module includes:

[0031] The program running submodule performs a soft restart on the device. After the system restarts, the program in the backup storage area B is automatically loaded. At the same time, the original area A is converted to the backup storage area, so that the device can run the program in the backup storage area B of the main control chip and realize remote upgrade.

[0032] According to the solution of the present invention, the device of the present invention has strong output compatibility and can provide two types of data output hardware interfaces and five data output protocol formats, thereby achieving compatibility between new and old protection equipment, improving the interconnection capability of the equipment, and reducing the risk of failure during power grid upgrades and renovations.

[0033] To address the issue of varying software versions due to varying rated delays for different types of electronic transformers, the present device stores the rated delay time in a user field within the main chip's internal program memory and configures it via optical Ethernet. This allows the module to read and transmit the rated delay time configured for each transformer type upon power-up, reducing the number of software versions required due to varying delays and lowering maintenance costs.

[0034] To address the high cost of upgrading and renovating the acquisition unit, the device of the present invention realizes online software upgrades through a fiber-optic Ethernet channel. Workers can complete the upgrade of the acquisition unit program in the control room without performing high-altitude operations or disassembling the acquisition unit, which greatly reduces the economic and operational costs of upgrading and renovating.

[0035] The device of the present invention can identify and judge whether the front-end sampling loop is open through sampling data, and send out an alarm signal when a large DC signal is detected, so as to timely discover and deal with potential fault hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A block diagram schematically illustrates the structural arrangement of a multifunctional configurable electronic transformer data acquisition and remote upgrade device according to an embodiment of the present invention;

[0037] Figure 2 The figure schematically shows a functional circuit diagram of a data acquisition module according to an embodiment of the present invention.

[0038] Figure 3 The figure schematically shows a functional circuit diagram of a remote program upgrade function module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The present invention will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are only for enabling those skilled in the art to better understand and implement the present invention, rather than implying any limitation on the scope of the present invention.

[0040] As used herein, the term "including" and variations thereof are to be interpreted as open-ended terms meaning "including, but not limited to." The term "based on" is to be interpreted as "based, at least in part, on." The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment."

[0041] Figure 1 The following schematically shows a block diagram of the structure of a multifunctional configurable electronic transformer data acquisition and remote upgrade device according to an embodiment of the present invention. Figure 1 As shown, in this embodiment, the multifunctional configurable electronic transformer data acquisition and remote upgrade device includes:

[0042] Data acquisition module 1 collects the secondary output voltage signal of the electronic transformer, converts the voltage signal into a digital signal through a filter circuit and an analog-to-digital conversion chip, determines the type of the original voltage signal at the input terminal based on the digital voltage signal, and performs open circuit determination of the input terminal signal based on the type of the original voltage signal;

[0043] The data acquisition module reads the rated delay time parameters and output configuration information of the device from the user storage area 11 of the on-chip memory 10 of the main control chip 9, and then organizes the rated delay time parameters, digital signals and input terminal open circuit judgment status information into packaged data according to the output configuration information, and then outputs the packaged data through the designated hardware port of the device;

[0044] Remote program upgrade function module 2, remote program upgrade module, adopts dual storage partition mechanism to realize update, the system defaults to run the program from the main storage area A 12, firstly monitors the upgrade instruction in real time through the optical fiber Ethernet port, when a legal upgrade request is detected, the system automatically receives and parses the data message, and writes the new version of the program that has passed the integrity check into the backup storage area B 13, after the data writing is completed, sets the program loading area to the backup storage area B 13, triggers a soft reset restart, and automatically loads the backup storage area B 13 program after the system restarts, and at the same time converts the main storage area A 12 into the backup storage area to realize remote upgrade.

[0045] Furthermore, according to one embodiment of the present invention, the data acquisition module 1 includes:

[0046] The data identification submodule 3 determines whether the voltage signal is an AC periodic signal or a DC non-periodic signal according to formula (2). If the voltage signal is an AC periodic signal, it is determined that there is no open circuit fault at the input terminal of the device; if the voltage signal is a DC non-periodic signal, it is determined that there is an open circuit fault at the input terminal of the device.

[0047] The voltage signal type needs to be determined based on a continuous sampling data point, the number of which is N.

[0048] The sampling frequency of the system voltage signal is f; for a voltage signal with a frequency of 50Hz, 10 cycles are taken as a data segment for judgment;

[0049] The calculation formula for N is:

[0050] Take the average of N consecutive sampling data. If the average is less than the empirical constant C, the voltage signal is judged to be an AC periodic signal, otherwise it is judged to be a DC non-periodic signal.

[0051] The calculation formula of the judgment process is:

[0052]

[0053] Among them, x i Sampling point value; i sampling point sequence; C empirical threshold constant;

[0054] When the sampled data is a 16-bit signed fixed-point number, the value of C is set to 11585 based on the experimental experience data of the terminal open circuit.

[0055] Furthermore, according to one embodiment of the present invention, the data acquisition module 1 includes:

[0056] The data reading submodule 4 reads the rated delay time parameter and output configuration information of the device from the user storage area of the on-chip memory of the main control chip;

[0057] The data packaging submodule 5 organizes the read rated delay time parameters, voltage signals and input terminal signal open circuit judgment information into packaged data according to the output configuration information, and then outputs the packaged data through the designated hardware port of the device.

[0058] Furthermore, according to an embodiment of the present invention, the output configuration information includes: hardware output port type and output protocol information;

[0059] The hardware output port type includes two groups of optical fiber data output ports, one group is a serial data single-transmit optical fiber interface, and the other group is an Ethernet bidirectional optical fiber interface.

[0060] Furthermore, according to one embodiment of the present invention, the remote program upgrade function module 2 includes:

[0061] The remote upgrade program judgment submodule 6 queries the fiber optic Ethernet port receiving message information to determine whether a remote upgrade program is required. If a remote upgrade program is not required, the remote upgrade program is continued to query the fiber optic Ethernet port receiving message information. If a remote upgrade program is required, the new program data in the fiber optic Ethernet port message information is received.

[0062] Furthermore, according to one embodiment of the present invention, the remote program upgrade function module 2 includes:

[0063] The new program writing and loading submodule 7 receives new program data and writes the new program data into the backup storage area B of the main control chip. After the new program data is written and stored, the program loading area is set to the backup storage area B.

[0064] Furthermore, according to one embodiment of the present invention, the remote program upgrade function module includes:

[0065] The program running submodule 8 performs a soft restart on the device. After the system restarts, the program in the backup storage area B is automatically loaded, and the original area A is converted to the backup storage area, so that the device can run the program in the backup storage area B of the main control chip and realize remote upgrading.

[0066] According to the above solution of the present invention, the device of the present invention has strong compatibility, and the device hardware is configured with two sets of fiber optic data output ports, namely a serial data single-shot fiber optic interface and an Ethernet bidirectional fiber optic interface, which supports five different data output protocol formats and achieves full compatibility between old and new protection equipment. The delay time of the device of the present invention is configurable, and the device allows the user to configure the rated delay time through the fiber optic Ethernet interface, which significantly reduces the diversity of software program versions caused by inconsistent delays, thereby effectively reducing maintenance costs. The device of the present invention supports online program upgrades, and the device supports upgrading program storage area data through the fiber optic Ethernet interface, realizing online upgrades of the device program, avoiding high-altitude operations and disassembly of acquisition units, and reducing the economic and operating costs of upgrades and modifications. The device of the present invention has fault detection and alarm functions. The device can identify and determine the wiring status of the sampling signal through sampling data, and send an alarm signal when a large DC signal is detected, so as to promptly discover and handle potential fault hazards.

[0067] Based on the above-mentioned solution, the main control chip in the multifunctional configurable electronic transformer data acquisition and remote upgrade device is a programmable logic device (PLD), which can run multiple modules simultaneously. The multifunctional configurable electronic transformer data acquisition and remote upgrade device actually includes two modules: a data acquisition module with configuration and open circuit alarm functions, and a remote program upgrade module.

[0068] like Figure 2 As shown in the figure, the data acquisition module implements the configuration and open circuit alarm functions through the following process:

[0069] S1. Receive the secondary output voltage signal of the electronic transformer;

[0070] S2. Convert the voltage signal into a digital signal through a filtering circuit and an analog-to-digital conversion chip;

[0071] S3. The data identification submodule determines whether the input voltage signal is an AC periodic signal or a DC non-periodic signal. If the voltage signal is an AC periodic signal, the device (multi-functional configurable electronic transformer data acquisition and remote upgrade device) is determined to have no open-circuit fault at its input terminal. If the voltage signal is a DC non-periodic signal, the device is determined to have an open-circuit fault at its input terminal. This step enables data identification and determines if a terminal open-circuit abnormality exists.

[0072] S4. The data reading submodule reads the rated delay time parameters and output configuration parameters (output configuration information) of the device from the user storage area of the on-chip memory of the main chip; the two parameters are written to the user storage area before the device leaves the factory;

[0073] Among them, the output configuration information includes the hardware output port type and output protocol information; the hardware output port type is divided into two groups of optical fiber data output ports, one group is a serial data single-transmit optical fiber interface, and the other group is an Ethernet bidirectional optical fiber interface; the serial data single-transmit optical fiber interface output protocol information includes three data protocol transmission formats, data protocol 1: the standard FT3 format protocol of 6.2.3 to 6.2.4 in "GB / T20840.8-2007 Transformer Part 8: Electronic Transformer"; data protocol 2: the extended FT3 format protocol of 6.2.3 to 6.2.4 in "IEC 60044-8:2002 Instrument transformers-Part 8: Electronic current transformers" adapted and promoted by the State Grid Corporation of China; data protocol 3: the asynchronous transmission protocol of 6.5.1.1 in "DL / T 282-2012 Technical Conditions for Merging Units"; the Ethernet bidirectional optical fiber interface output protocol information includes two data protocol transmission formats, data protocol 4: the extended FT3 format protocol of 6.2.3 to 6.2.4 in "DL / T 860.92-2016 Electric Power Automation Communication Networks and Systems Part 9-2: Specific Communication Service Mapping (SCSM) - Sampled Values Based on ISO / IEC 8802-3" format specification; Data Specification V: "DL / T 860.91-2016 Electric Power Automation Communication Networks and Systems Part 9-1: Specific Communication Service Mapping (SCSM) Sampled Values over Unidirectional Multi-channel Point-to-Point Serial Communication Links" format specification;

[0074] S5. The data packaging submodule organizes and packages the rated delay time parameters, sampled data, and input terminal open circuit alarm information according to the output protocol information. Steps S4 and S5 implement the rated delay time configurability function.

[0075] S6. The device of the present invention outputs the packaged data from the designated hardware port according to the hardware output port type. Steps S4-S6 implement the device output protocol configurable function.

[0076] As can be seen from the above, the present invention can realize the configurable function of the device output type and rated delay time, as well as the input terminal signal open circuit fault judgment and alarm function through the data acquisition module.

[0077] Further, if Figure 3 As shown, the remote program upgrade function module implements the remote program upgrade function through the following process:

[0078] S1. The present invention runs the program in the main control chip program storage area A (main storage area A), and then proceeds to the next step;

[0079] S2 remote upgrade program judgment submodule query fiber Ethernet port receives message information, determine whether the remote upgrade program is needed, if no remote upgrade program is required, the module continues to query the fiber Ethernet port receives message information, if you need an online program upgrade program, the module proceeds to the next step;

[0080] S3 new program writing and loading submodule receives the new program data in the fiber optic Ethernet port message information, and then proceed to the next step;

[0081] S4 new program writing and loading submodule will receive the new program data is written to the main control chip program storage area B, and then proceed to the next step;

[0082] S5. The new program is received and stored, the new program is written and loaded into the submodule to set the program loading area to the program storage area B, and then proceed to the next step;

[0083] S6. The program execution submodule soft-restarts the device of the present invention and then proceeds to the next step;

[0084] S7. The program execution submodule loads the program from the program storage area B (spare storage area B) and then proceeds to the next step;

[0085] S8. The device of the present invention runs the program in the main control chip program storage area B.

[0086] As can be seen from the above, the present invention implements the device program remote upgrade function through the remote program upgrade function module.

[0087] According to the above solution of the present invention, the output compatibility of the device of the present invention is strong, and it can provide two types of data output hardware interfaces and five data output protocol formats, thereby achieving compatibility between new and old protection equipment, improving the interconnection capability of the equipment, and reducing the risk of failure during power grid upgrades and renovations.

[0088] To address the issue of varying software versions due to varying rated delays for different types of electronic transformers, the present device stores the rated delay time in a user field within the main chip's internal program memory and configures it via optical Ethernet. This allows the module to read and transmit the rated delay time configured for each transformer type upon power-up, reducing the number of software versions required due to varying delays and lowering maintenance costs.

[0089] To address the high cost of upgrading and renovating the acquisition unit, the device of the present invention realizes online software upgrades through a fiber-optic Ethernet channel. Workers can complete the upgrade of the acquisition unit program in the control room without performing high-altitude operations or disassembling the acquisition unit, which greatly reduces the economic and operational costs of upgrading and renovating.

[0090] The device of the present invention can identify and judge whether the front-end sampling loop is open through sampling data, and send out an alarm signal when a large DC signal is detected, so as to timely discover and deal with potential fault hazards.

[0091] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. Multifunctional configurable electronic transformer data acquisition and remote upgrade device, characterized in that: include: The data acquisition module collects the secondary output voltage signal of the electronic transformer, converts the voltage signal into a digital signal through a filter circuit and an analog-to-digital conversion chip, determines the type of the original voltage signal at the input terminal based on the digital voltage signal, and performs open circuit determination of the input terminal signal based on the type of the original voltage signal; The data acquisition module reads the rated delay time parameters and output configuration information of the device from the user storage area of the on-chip memory of the main control chip, then organizes the rated delay time parameters, digital signals and input terminal open circuit judgment status information into packaged data according to the output configuration information, and then outputs the packaged data through the designated hardware port of the device; The remote program upgrade module uses a dual storage partition mechanism to implement updates. The system runs the program from the main storage area A by default. First, it monitors the upgrade instructions in real time through the fiber optic Ethernet port. When a legitimate upgrade request is detected, the system automatically receives and parses the data message, and writes the new version of the program that has passed the integrity check into the backup storage area B. After the data is written, the program loading area is set to the backup storage area B, triggering a soft reset restart. After the system restarts, the program in the backup storage area B is automatically loaded, and the main storage area A is converted to the backup storage area to achieve remote upgrade.

2. The multifunctional configurable electronic transformer data acquisition and remote upgrade device according to claim 1, characterized in that: The data acquisition module includes: The data identification submodule determines whether the voltage signal is an AC periodic signal or a DC non-periodic signal according to formula (2). If the voltage signal is an AC periodic signal, it is determined that there is no open circuit fault at the input terminal of the device; if the voltage signal is a DC non-periodic signal, it is determined that there is an open circuit fault at the input terminal of the device; The voltage signal type needs to be determined based on a continuous sampling data point, the number of which is N. The sampling frequency of the system voltage signal is f; for a voltage signal with a frequency of 50Hz, 10 cycles are taken as a data segment for judgment; The calculation formula for N is: Take the average of N consecutive sampling data. If the average is less than the empirical constant C, the voltage signal is judged to be an AC periodic signal, otherwise it is judged to be a DC non-periodic signal. The calculation formula of the judgment process is: Among them, x i Sampling point value; i sampling point sequence; C empirical threshold constant; When the sampled data is a 16-bit signed fixed-point number, the value of C is set to 11585 based on the experimental experience data of the terminal open circuit.

3. The multifunctional configurable electronic transformer data acquisition and remote upgrade device according to claim 1, characterized in that: The data acquisition module includes: A data reading submodule reads the rated delay time parameters and output configuration information of the device from the user storage area of the on-chip memory of the main control chip; The data packaging submodule organizes the read rated delay time parameters, voltage signals and input terminal signal open circuit judgment information into packaged data according to the output configuration information, and then outputs the packaged data through the specified hardware port of the device.

4. The multifunctional configurable electronic transformer data acquisition and remote upgrade device according to claim 1, characterized in that: The output configuration information includes: hardware output port type and output protocol information; The hardware output port type includes two groups of optical fiber data output ports, one group is a serial data single-transmit optical fiber interface, and the other group is an Ethernet bidirectional optical fiber interface.

5. The multifunctional configurable electronic transformer data acquisition and remote upgrade device according to claim 1, characterized in that: The remote program upgrade function module includes: The remote upgrade program judgment submodule queries the fiber optic Ethernet port receiving message information to determine whether a remote program upgrade is required. If a remote program upgrade is not required, the submodule continues to query the fiber optic Ethernet port receiving message information. If a remote program upgrade is required, the submodule receives new program data in the fiber optic Ethernet port message information.

6. The multifunctional configurable electronic transformer data acquisition and remote upgrade device according to claim 1, characterized in that: The remote program upgrade function module includes: The new program writing and loading submodule receives new program data and writes the new program data into the backup storage area B of the main control chip. After the new program data is written and stored, the program loading area is set to the backup storage area B.

7. The multifunctional configurable electronic transformer data acquisition and remote upgrade device according to any one of claims 1 to 6, characterized in that: The remote program upgrade function module includes: The program running submodule performs a soft restart on the device. After the system restarts, the program in the backup storage area B is automatically loaded. At the same time, the original area A is converted to the backup storage area, so that the device can run the program in the backup storage area B of the main control chip and realize remote upgrade.

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