CN113094114A

CN113094114A - ADC-based power distribution terminal software implementation method and system

Info

Publication number: CN113094114A
Application number: CN202110206784.3A
Authority: CN
Inventors: 黄月朝; 于丽娇; 陈治国; 齐斌
Original assignee: Cloud Valley Technology Zhuhai Co ltd
Current assignee: Cloud Valley Technology Zhuhai Co ltd
Priority date: 2021-02-24
Filing date: 2021-02-24
Publication date: 2021-07-09
Anticipated expiration: 2041-02-24
Also published as: CN113094114B

Abstract

The invention provides a method and a system for realizing power distribution terminal software based on an ADC (analog to digital converter), and relates to the field of power distribution automation. The ADC-based power distribution terminal software implementation method comprises the following steps: creating a software ADC object, wherein the ADC object realizes a starting conversion function, a continuous acquisition starting function and a channel data storage function; reading a software ADC configuration file, wherein the configuration file is used for configuring a software ADC; reading wave recording file data, and placing the wave recording data in a channel data buffer area of a software ADC; and if the timing sampling is interrupted, replacing the interface of the original reading hardware ADC channel with a data interface in the data buffer of the software ADC channel. The relay protection function can be developed by using a software ADC technology and only needing a waveform file. In addition, the invention also provides a distribution terminal software implementation system based on the ADC, which comprises: the device comprises a creating module, a configuration module, a reading module and a replacing module.

Description

ADC-based power distribution terminal software implementation method and system

Technical Field

The invention relates to the field of distribution automation, in particular to a distribution terminal software implementation method and system based on an ADC (analog to digital converter).

Background

In the field of distribution automation, information data such as voltage and current need to be collected, fault location, fault isolation and power supply to a non-fault area need to be recovered. The key device used for collecting information data such as voltage, current and the like is an ADC (analog-to-digital converter). The commonly used ADC has an external ADC and a built-in ADC. The external ADC is an independent chip and has two interface modes of a serial interface and a parallel interface. External ADCs are typically relatively high precision, but are expensive. Such as AD7616 from ADI, is an external ADC. Built-in ADCs refer to ADCs that are integrated within the CPU, typically with direct access. Built-in ADCs are typically relatively low in accuracy and cost is already built into the CPU. Regardless of the external ADC or the built-in ADC, the data such as voltage and current must be collected by using a corresponding electric quantity. Usually, in the product debugging stage, a relay protection tester is required for outputting the electrical quantities. These devices are generally very expensive. The external ADC or the built-in ADC both need actual hardware, and the equipment such as a relay protection tester needs to be equipped to debug the application software. This is very expensive in the product development stage. In the field of distribution automation, debugging of relay protection application functions is often required, and the relay protection functions can hardly be used without devices such as an ADC. And the relay protection is used for judging that the data of the protection function are all from the data obtained by ADC sampling. The data sampled by the ADC is usually derived from the voltage and current output by the relay protection tester. In the development of relay protection application functions, it is obvious that a relay protection tester is only an electric quantity output tool. In order to debug the power distribution relay protection function, a hardware ADC is necessary to sample, and data obtained by sampling by the hardware ADC is from voltage and current output by a relay protection tester, which is expensive in development mode.

Disclosure of Invention

The invention aims to provide a power distribution terminal software implementation method based on an ADC (analog to digital converter), which can use a software ADC technology, wherein the sampled data is derived from a waveform file in a wave recording format, a relay protection tester is not needed, and the relay protection function can be developed only by using the waveform file due to the software ADC technology.

Another object of the present invention is to provide a distribution terminal software implementation system based on ADC, which can operate a distribution terminal software implementation method based on ADC.

The embodiment of the invention is realized by the following steps:

in a first aspect, an embodiment of the present application provides a method for implementing distribution terminal software based on an ADC, including creating a software ADC object, where the ADC object implements a start-up conversion function, a continuous acquisition start-up function, and a channel data storage function; reading a software ADC configuration file, wherein the configuration file is used for configuring a software ADC; reading wave recording file data, and placing the wave recording data in a channel data buffer area of a software ADC; and if the timing sampling is interrupted, replacing the interface of the original reading hardware ADC channel with a data interface in the data buffer of the software ADC channel.

In some embodiments of the present invention, the start-up switching function includes: the initialization channel sample count is 0 and the software ADC start flag is set to 1 to indicate that conversion is started.

In some embodiments of the present invention, the continuous acquisition start function includes: the sampling count of the initialization channel is 0, the starting flag of the software ADC is set to be 1 to represent the starting conversion, and the continuous acquisition starting flag of the ADC is set to be 1.

In some embodiments of the present invention, the channel data storage function includes: and analyzing the voltage and current data from the waveform file and filling the voltage and current data into the corresponding channel.

In some embodiments of the invention, the reading the software ADC configuration file, the configuration file for configuring the software ADC includes: the configuration file is a cJSON file, and the corresponding relation between the ADC channel of the configuration software and the channel described by the waveform file is configured.

In some embodiments of the present invention, the reading the recording file data and placing the recording data in the channel data buffer of the software ADC includes: and inputting the names of the wave recording files as adc.cfg and adc.dat, and analyzing the channels and the data corresponding to the channels from the wave recording files.

In some embodiments of the present invention, the reading the recording file data and placing the recording data in the channel data buffer of the software ADC includes: obtaining the number of analog channels according to adc.cfg, and obtaining the number of records; and according to the number of the recording strips, the recording data is put into a channel data buffer area of the software ADC.

In some embodiments of the present invention, after replacing the interface of the original hardware ADC channel with the data interface in the data buffer of the software ADC channel if the timed sampling is interrupted, the method further includes: and setting an overcurrent I section protection fixed value, and debugging relay protection by using a software ADC (analog to digital converter) technology to obtain a oscillogram.

In a second aspect, an embodiment of the present application provides a power distribution terminal software implementation system based on an ADC, including a creation module, configured to create a software ADC object, where the ADC object implements a start conversion function, a continuous acquisition start function, and a channel data storage function; the configuration module is used for reading a software ADC configuration file, and the configuration file is used for configuring the software ADC; the reading module is used for reading wave recording file data and putting the wave recording data into a channel data buffer area of the software ADC; and the replacing module is used for replacing the interface of the original reading hardware ADC channel with the data interface in the data buffer area of the software ADC channel if the timing sampling is interrupted.

In some embodiments of the invention, the above includes: at least one memory for storing computer instructions; at least one processor in communication with the memory, wherein the at least one processor, when executing the computer instructions, causes the system to: the device comprises a creating module, a configuration module, a reading module and a replacing module.

Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:

the distribution terminal software ADC can debug the relay protection function without a relay protection tester; only one wave recording waveform file can be used no matter how complex the voltage and current represented by the waveform file are; the sampling data is derived from data in the waveform file, not the relay protection tester; the distribution terminal software ADC can flexibly adjust the voltage and current channels corresponding to the channels according to the configuration file, and can randomly adjust the sampling frequency without changing the frequency described by the waveform file.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic diagram illustrating steps of a distribution terminal software implementation method based on an ADC according to an embodiment of the present invention;

fig. 2 is a detailed step diagram of a power distribution terminal software implementation method based on an ADC according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a distribution terminal software implementation system module based on an ADC according to an embodiment of the present invention;

FIG. 4A is a configuration file format according to an embodiment of the present invention;

FIG. 4B is the supplemental content of FIG. 4A;

fig. 5 is a configuration file content provided in an embodiment of the present invention.

Icon: 10-a creation module; 20-configuration module; 30-a reading module; 40-replacement of the module.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the individual features of the embodiments can be combined with one another without conflict.

Example 1

Referring to fig. 1, fig. 1 is a schematic diagram illustrating steps of a power distribution terminal software implementation method based on an ADC according to an embodiment of the present invention, and the steps are as follows:

step S100, a software ADC object is created, and the ADC object realizes a starting conversion function, a continuous acquisition starting function and a channel data storage function;

in some embodiments, one software ADC object g _ soft _ ADC _ Obj is created. The ADC object realizes the functions of starting conversion, continuous acquisition starting, channel data storage and the like. The software ADC starts the conversion function: initializing a channel sampling count to 0; setting the software ADC start flag to 1 indicates starting the conversion. The software ADC continuously collects and starts the functions: initializing a channel sampling count to 0; setting a software ADC starting mark as 1 to represent starting conversion; setting an ADC continuous acquisition starting mark as 1. the software ADC channel data storage function: and interpreting voltage and current data from the waveform file and filling the voltage and current data into the corresponding channel.

Step S110, reading a software ADC configuration file, wherein the configuration file is used for configuring a software ADC;

in some embodiments, a software ADC configuration file soft ADC json is read. The configuration file is used for configuring the software ADC, and mainly configures the corresponding relation between the software ADC channel and the channel described by the waveform file. The configuration file is a cJSON file. Wherein UIx is used to describe a voltage or current such as "Ia" for phase a current. No input is denoted by "None". ADC _ CHx is used to describe the hardware ADC physical channel. Wave _ Index represents an Index in the waveform, as indicated by nothing "-1". The configuration file format is shown in fig. 4A and 4B.

Step S120, reading wave recording file data, and placing the wave recording data in a channel data buffer area of the software ADC;

in some embodiments, the recording file data is read, and the name of the recording file is required to be input as adc. And interpreting the channel and the data corresponding to the channel from the recording file. The method comprises the following steps: obtaining the number of analog channels according to adc.cfg; obtaining the number of recorded strips; and according to the number of the recording strips, the recording data is put into a channel data buffer area of the software ADC.

Step S130, if the timing sampling is interrupted, replacing the interface of the original hardware ADC channel with the data interface in the data buffer of the software ADC channel.

In some embodiments, in the 156us timed sample interrupt, the interface that originally reads the hardware ADC channel is changed to the data interface in the software ADC channel buffer. Therefore, the data source is the waveform file instead of the relay protection tester, and the aim of replacing the relay protection tester is fulfilled.

Example 2

Referring to fig. 2, fig. 2 is a detailed step diagram of a power distribution terminal software implementation method based on an ADC according to an embodiment of the present invention, which is shown as follows:

step S200, initializing the channel sampling count to be 0, and setting the software ADC starting flag to be 1 to represent starting conversion.

Step S210, initializing the channel sampling count to 0, setting the software ADC start flag to 1 to indicate start of conversion, and setting the ADC continuous acquisition start flag to 1.

In step S220, the voltage and current data are parsed from the waveform file and filled into the corresponding channels.

And step S230, configuring the correspondence between the ADC channel of the software and the channel described by the waveform file, wherein the configuration file is a cJSON file.

Step S240, inputting the names adc.cfg and adc.dat of the recording files, and analyzing the channels and the data corresponding to the channels from the recording files.

Step S250, obtaining the number of analog channels according to adc.cfg, and obtaining the number of records;

and step S260, according to the number of the recording strips, the recording data is put into a channel data buffer area of the software ADC.

And step S270, setting an overcurrent I section protection fixed value, and debugging relay protection by using a software ADC technology to obtain a oscillogram.

In some embodiments, a configuration file soft _ adc. The file configures the channel correspondence between the software ADC channel and the waveform file. The contents of the file are shown in fig. 4A and 4B;

2. and preparing wave recording waveform files adc.cfg, adc.dat. Cfg is a recording configuration file and dat is a recording data file. The profile contents are shown in fig. 5.

After the above 2 steps are ready, the software ADC can acquire recording data. When wave recording data is acquired, the original interface for reading the hardware ADC is changed into the interface for reading the software ADC channel data.

Setting the overcurrent I section protection constant value to be 5A, and debugging the waveform obtained by relay protection by using software ADC technology

Example 3

Referring to fig. 3, fig. 3 is a schematic diagram of a distribution terminal software implementation system based on an ADC according to an embodiment of the present invention, which is as follows:

the device comprises a creating module 10, a channel data storage module and a processing module, wherein the creating module is used for creating a software ADC object, and the ADC object realizes a starting conversion function, a continuous acquisition starting function and a channel data storage function;

a configuration module 20, configured to read a software ADC configuration file, where the configuration file is used to configure the software ADC;

the reading module 30 is used for reading wave recording file data and placing the wave recording data into a channel data buffer area of the software ADC;

and the replacing module 40 is used for replacing the interface of the original read hardware ADC channel with a data interface in the data buffer of the software ADC channel if the timing sampling is interrupted.

Also included are a memory, a processor, and a communication interface, which are electrically connected, directly or indirectly, to each other to enable transmission or interaction of data. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The memory may be used to store software programs and modules, and the processor may execute various functional applications and data processing by executing the software programs and modules stored in the memory. The communication interface may be used for communicating signaling or data with other node devices.

The Memory may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like.

The processor may be an integrated circuit chip having signal processing capabilities. The Processor may be a general-purpose Processor including a Central Processing Unit (CPU), a Network Processor (NP), etc.; but also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components.

It will be appreciated that the configuration shown in fig. 3 is merely illustrative and may include more or fewer components than shown in fig. 3, or have a different configuration than shown in fig. 3. The components shown in fig. 3 may be implemented in hardware, software, or a combination thereof.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In summary, according to the method and the system for realizing the distribution terminal software based on the ADC provided by the embodiment of the present application, the distribution terminal software ADC can debug the relay protection function without a relay protection tester; only one wave recording waveform file can be used no matter how complex the voltage and current represented by the waveform file are; the sampling data is derived from data in the waveform file, not the relay protection tester; the distribution terminal software ADC can flexibly adjust the voltage and current channels corresponding to the channels according to the configuration file, and can randomly adjust the sampling frequency without changing the frequency described by the waveform file.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A power distribution terminal software implementation method based on ADC is characterized by comprising the following steps:

creating a software ADC object, wherein the ADC object realizes a starting conversion function, a continuous acquisition starting function and a channel data storage function;

reading a software ADC configuration file, wherein the configuration file is used for configuring a software ADC;

reading wave recording file data, and placing the wave recording data in a channel data buffer area of a software ADC;

and if the timing sampling is interrupted, replacing the interface of the original reading hardware ADC channel with a data interface in the data buffer of the software ADC channel.

2. The ADC-based power distribution terminal software implementation method of claim 1, wherein the enabling a conversion function comprises:

the initialization channel sample count is 0 and the software ADC start flag is set to 1 to indicate that conversion is started.

3. The ADC-based power distribution terminal software implementation method of claim 1, wherein said continuous acquisition initiation function comprises:

the sampling count of the initialization channel is 0, the starting flag of the software ADC is set to be 1 to represent the starting conversion, and the continuous acquisition starting flag of the ADC is set to be 1.

4. The ADC-based power distribution terminal software implementation method of claim 1, wherein the channel data storage function comprises:

and analyzing the voltage and current data from the waveform file and filling the voltage and current data into the corresponding channel.

5. The ADC-based power distribution terminal software implementation method of claim 1, wherein the reading a software ADC configuration file, the configuration file being used to configure a software ADC, comprises:

the configuration file is a cJSON file, and the corresponding relation between the ADC channel of the configuration software and the channel described by the waveform file is configured.

6. The ADC-based power distribution terminal software implementation method of claim 1, wherein the reading of the recording file data and the placing of the recording data in the channel data buffer of the software ADC comprises:

and inputting the names of the wave recording files as adc.cfg and adc.dat, and analyzing the channels and the data corresponding to the channels from the wave recording files.

7. The ADC-based power distribution terminal software implementation method of claim 1, wherein the reading of the recording file data and the placing of the recording data in the channel data buffer of the software ADC comprises:

obtaining the number of analog channels according to adc.cfg, and obtaining the number of records;

and according to the number of the recording strips, the recording data is put into a channel data buffer area of the software ADC.

8. The ADC-based power distribution terminal software implementation method of claim 1, wherein, after replacing the interface of the original read hardware ADC channel with the data interface in the data buffer of the software ADC channel if the timed sampling is interrupted, the method further comprises:

and setting an overcurrent I section protection fixed value, and debugging relay protection by using a software ADC (analog to digital converter) technology to obtain a oscillogram.

9. An ADC-based power distribution terminal software implementation system is characterized by comprising:

the device comprises a creating module, a processing module and a processing module, wherein the creating module is used for creating a software ADC object, and the ADC object realizes a starting conversion function, a continuous acquisition starting function and a channel data storage function;

the configuration module is used for reading a software ADC configuration file, and the configuration file is used for configuring the software ADC;

the reading module is used for reading wave recording file data and putting the wave recording data into a channel data buffer area of the software ADC;

and the replacing module is used for replacing the interface of the original reading hardware ADC channel with the data interface in the data buffer area of the software ADC channel if the timing sampling is interrupted.

10. The ADC-based power distribution terminal software implementation system of claim 9, comprising:

at least one memory for storing computer instructions;

at least one processor in communication with the memory, wherein the at least one processor, when executing the computer instructions, causes the system to perform: the device comprises a creating module, a configuration module, a reading module and a replacing module.