CN113064826A - Automatic test platform of high-voltage SVG product based on RT-LAB - Google Patents
Automatic test platform of high-voltage SVG product based on RT-LAB Download PDFInfo
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Abstract
The invention relates to the technical field of simulation test, and discloses an automatic test platform of a high-voltage SVG product based on RT-LAB, which comprises a master control server, the system comprises a power amplifier, a line changing tool, a SVN server, a version building server and an RT-LAB host, wherein the power amplifier and the line changing tool are sequentially connected with a plurality of SVG products to be tested, the database server is used for storing test parameters, the SVN server is used for storing test scripts, the version building server is used for compiling source codes of the SVG products to generate a program package, the line changing tool is used for switching loops of secondary analog quantity and switching quantity, and the master control server controls the RT-LAB host to simulate various test working conditions of the SVG products to be tested by reading data in the version building server, the database server and the SVN server to test the SVG products to be tested.
Description
Technical Field
The invention relates to the technical field of simulation tests, in particular to an automatic test platform for a high-voltage SVG product based on RT-LAB.
Background
With the increase of the proportion of new energy in a power grid, the application of the power grid alternating current and direct current technology and the use of a large number of high-capacity power electronic devices, the problems of electric energy quality and reactive power compensation are increasingly highlighted. The dynamic reactive compensation generator (SVG) has been increasingly applied because of its characteristics of fast response speed, strong power quality improving functions such as suppressing voltage flicker and controlling harmonic waves. In the power electronic application industry, RT-LAB is used as a professional real-time simulation platform, is widely applied to the research fields of inverter power grids, MMC, HVDC, FACTS and the like, and is an important technical means for simulation evaluation of a control algorithm, but the existing test method is mostly based on manual test, and a tester needs to click a button or modify parameters in the test to simulate various actual faults, wait for a long time for a test result and then analyze the test result through data analysis software such as MATLAB and the like. However, this manual testing method is inefficient and most of the tester's time and effort is wasted in repetitive operations.
Disclosure of Invention
The invention provides an automatic testing platform of a high-voltage SVG product based on RT-LAB, which solves the problems of long testing time, low testing efficiency and the like of the existing testing device which adopts manual testing.
The invention can be realized by the following technical scheme:
an automatic test platform of a high-voltage SVG product based on RT-LAB comprises a master control server, wherein the master control server is connected with a database server, an SVN server, a version construction server and an RT-LAB host, the RT-LAB host is connected with a plurality of SVG products to be tested sequentially through a power amplifier and a line changing tool, the database server is used for storing test parameters, the SVN server is used for storing test scripts, the version construction server is used for compiling SVG product source codes to generate a program package, the line changing tool is set as equipment with a large amount of switching value output and used for circuit switching of secondary analog quantity and switching value, the master control server controls the RT-LAB host to simulate various test working conditions of the SVG products to be tested by reading data in the version construction server, the database server and the SVN server, and testing the SVG product to be tested, simultaneously acquiring feedback information of the SVG product to be tested, and storing a test result to a database server.
Further, the test script comprises an SVG device parameter configuration file, a test environment configuration file, a test execution script file and an RT-LAB host system model file;
the test parameters comprise a program version of the SVG device to be tested, fixed value parameters, values of test input quantity and expected test results;
the test execution script file is a program file which is developed by a test case through a Python language and can be executed by a computer; the test input quantity comprises voltage and current analog quantity output by the power amplifier and a switching value signal output by the RT-LAB host;
the master control server is used for reading the test script and the test parameters, executing the test script, controlling the RT-LAB host to output small signals, generating secondary analog quantity signals through the power amplifier, and switching the secondary analog quantity signals to the SVG product to be tested through the wire changing tool.
Furthermore, the master control server refers to the Rtlab Api file to realize calling of an API (application program interface) of the RT-LAB host, and directly calls a function of the RT-LAB host by using a Python code to realize simulation of various working conditions of the system and wave recording analysis of system data.
Further, the test scripts are classified and managed according to the universality and reusability of the test scripts; the test working conditions comprise a system voltage high-penetration test, a system voltage low-penetration test, a frequency penetration test and an action performance test of the SVG equipment to be tested under the typical fault of the power system.
The beneficial technical effects of the invention are as follows:
by means of the master control server, the database server, the SVN server, the version construction server, the RT-LAB host, the power amplifier and the automatic test platform constructed by the line changing tool, the test of the SVG product to be tested under various test working conditions such as system voltage high-voltage penetration test, system voltage low-voltage penetration test, frequency penetration test, action performance test of the SVG device to be tested under typical faults of the power system and the like can be completed, a large amount of manual operation is not needed, the test time is saved, and the test efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a hardware deployment of an automated test platform according to the present invention;
FIG. 2 is a schematic diagram of the software architecture of the automated test platform of the present invention;
FIG. 3 is a schematic diagram illustrating a test script executing process of the automated test platform according to the present invention;
FIG. 4 is a flowchart illustrating a test execution phase of the automated test platform according to the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
As shown in figures 1 and 2, the invention provides an automatic test platform of a high-voltage SVG product based on RT-LAB, which comprises a main control server, wherein the main control server is connected with a database server, an SVN server, a version construction server and an RT-LAB host computer, the RT-LAB host computer is connected with a plurality of SVG products to be tested sequentially through a power amplifier and a wire changing tool, the database server is used for storing test parameters, the SVN server is used for storing test scripts, the version construction server is used for compiling source codes of the SVG products to generate a program package, the wire changing tool is a device which is self-developed and has a large amount of switching value output and is used for the loop switching of secondary analog quantity and switching value, the main control server controls the RT-LAB host computer to simulate a plurality of test working conditions of the SVG products to be tested by reading data in the version construction server, the database server and the SVN server, and testing the SVG product to be tested, simultaneously acquiring feedback information of the SVG product to be tested, and storing a test result to a database server. Therefore, by means of the master control server, the database server, the SVN server, the version construction server, the RT-LAB host, the automatic test platform constructed by the power amplifier and the line changing tool, the test of the SVG product to be tested under various test working conditions such as system voltage high-voltage penetration test, system voltage low-voltage penetration test, frequency penetration test, action performance test of the SVG device to be tested under typical faults of a power system and the like can be completed, a large amount of manual operation is not needed, the test time is saved, and the test efficiency is improved.
The hardware deployment of the automatic testing platform is shown in fig. 1 and comprises a main control server, an SVN server, a database server, a version construction server, an RT-LAB host, a power amplifier, a line changing tool and a plurality of SVG products to be tested, wherein the main control server is used as the core of the platform and is respectively connected with each server and equipment in a testing environment by adopting a network. In the test environment preparation stage, the master control server controls the wire changing tool to perform secondary automatic wire changing, switches to the SVG product to be tested, obtains a source code of the SVG product from the version construction server, compiles the source code to generate a program package, and sends the program package to the SVG product to be tested; in the test execution stage, the main control server obtains test parameters from the database server, obtains a test script from the SVN server, and controls the RT-LAB host to execute a test, which is specifically as follows:
since the RT-LAB is a real-time simulation system of the Simulink platform based on MATLAB, firstly, a non-real-time simulation model of Simulink needs to be transformed into a real-time simulation model which can be recognized by the RT-LAB. According to the number of CPU cores of the RT-LAB, an SM (System _ Master) main System sub-module (Subsystem), a plurality of SS (System _ Slave) Slave System sub-modules can be constructed, the total number of the main System and the Slave System can not exceed the maximum configurable number of the CPU cores of the RT-LAB, and in addition, an SC (System _ Console) control System sub-module, namely a user interaction module, is required to be included for observing each output value and sending out a control signal.
The SM system mainly comprises an SVG model (composed of a Modular Multilevel Converter (MMC) bridge, a circuit breaker and a connecting reactor), an equivalent power grid model (composed of a generator, a transformer, a power transmission line, a load and fault simulation module), a calculation and signal transmission module, a wave recording module and a communication module (responsible for the signal transmission of analog quantity and state quantity between an RT-LAB host and an SVG product); the SC system mainly comprises an observation module and a fault enabling module aiming at key analog quantity, and the RT-LAB model simulation is controlled through a Python script after the final model construction is finished.
The method comprises the following steps that a fault signal and a switch enabling signal are used as a Control signal set (Control signal-Acquisition Group) and are transmitted to an SM subsystem through an Opcomm module by an SC subsystem, and the signals are mainly generated by a constant module of a model: the switch signal, mainly the external trigger signal of the breaker element, can be realized by modifying the constant module to set 0 or 1, and the analog quantity signal can be assigned to the constant module directly. A specific item of data of the control signal set can be changed by a Python API command rtlabapi. Editing and establishing a test script library:
the test scripts are established on a SVN server special for a company, and the main contents comprise:
SVG equipment parameter configuration files;
secondly, switching configuration files of the platform test environment;
testing the execution script file;
fourth, RT-LAB host system model file;
the test script is a program file which is developed through a Python language according to a test case and can be executed by a computer, in addition, the test script can be divided into two types according to the universality and reusability of the test script, one type is a data processing script, such as RT-LAB model preparation, RT-LAB model operation, message packing and analysis and the like, has strong universality and solidified execution steps, and does not need to be changed in a large amount in the later period; and the other type is task execution scripts, such as parameter modification of SVG products to be tested, parameter modification of RT-LAB models and other configurable program segments, which can change along with the model, test requirements and data set updating, so that later-stage updating and maintenance are required. As shown in fig. 3, when the data processing script is executed, all the parameters of the test are read from the database, and then the parameters are classified and packaged according to the communication address mapping, the parameter address mapping and the extraction of the device parameters and the model parameters, and the parameters are used as the recognizable input quantity in the task execution script; and the task execution script configures a test environment according to the input quantity, calls an RT-LAB model to start executing a test, performs log recording on the test process, analyzes the test data and outputs the test data to the data processing script to be transmitted to the database.
Editing and building a test database:
these test data are built on a database server dedicated to the company and are classified into the following 4 categories by field: modifying parameters of the RT-LAB model, modifying parameters of the SVG to be tested, expected values of the test results and actual values of the test results. The method specifically comprises the following steps:
firstly, version and fixed value parameters of SVG equipment to be tested;
testing the numerical value of the input quantity;
the expected result of the test;
fourthly, feedback information and test results of the SVG product to be tested are obtained;
the test input quantity comprises analog quantities such as voltage and current output by the power amplifier and switching value signals output by the RT-LAB host;
and finally, developing platform control software through Python, installing the platform control software on a main control server connected with the database server, the SVN server, the version construction service, the RT-LAB host and the SVG equipment to be tested, reading the test script and the test parameters by the main control server, executing the test script, controlling the RT-LAB host to output small signals, generating secondary analog quantity signals through a power amplifier, and switching the secondary analog quantity signals to the SVG product to be tested through a wire changing tool. By introducing the Rtlab Api file into the platform main control program, calling an API (application programming interface) of the RT-LAB host computer is realized, an RT-LAB function is directly called by a Python code, and simulation of various working conditions of the system and wave recording analysis of system data are realized.
The software architecture of the automatic test platform is shown in fig. 2, a test script file and a simulation model file are stored and managed through an SVN server, and an RT-LAB host configuration parameter and a SVG product constant value parameter to be tested are managed through a database server. When a new version is detected to be built, the test platform firstly prepares for test environment deployment according to a version file name, wherein the preparation comprises name comparison of an SVG product to be tested, SVG product program acquisition, test script acquisition and simulation model file acquisition; then, the platform starts to deploy a test environment, including controlling a line changing tool to switch the SVG product to be tested, upgrading the SVG product program and the like; then, all the test scripts are executed in sequence; and finally, uploading the test result to a database for storage, and generating a test report by a tester through a corresponding tool of the database after the test is finished.
The execution process of a single test script is divided into three steps, firstly, the preparation before test execution is carried out, including the modification of SVG product parameters, such as control modes, control parameters and the like, then, an RT-LAB host computer is controlled to compile, load and operate a simulation model, a startup command is sent to a controller, secondly, after the SVG product is put into operation, a platform simulates the scene of various faults of a system in a mode of modifying the parameters in the RT-LAB model, simultaneously, each path of analog quantity and switching quantity data in the system are stored into a mat file by starting an RT-LAB wave recording function during the fault occurrence period, simultaneously, the fault event and the wave recording file of the SVG product to be tested are read, finally, the test result judgment and the test parameter recovery are carried out, the RT-LAB host computer wave recording data and the data sent by the device are analyzed, and then the expected data in a database are compared, and obtaining a final test result, and uploading the final test result to a database for storage. In the test execution process, a tester can query the database through the database management system, know the test progress and the test data, and generate a final test report after the test is finished.
After a new version to be tested is built, a test task scheduling module of the platform firstly judges whether test conditions are met, if so, test parameters are respectively obtained from a database server, test scripts are obtained from an SVN server, then a task execution module deploys a test environment, the test environment comprises line changing of equipment to be tested and downloading of a program to be tested, then an RT-LAB model is called to start to execute the test, a scene that various faults occur in the system is simulated, meanwhile, the test data is analyzed, the test data and the test results are stored in the database, and finally, after all the scripts are executed, a tester can check the test results through a database management system and generate a test report.
Fig. 4 shows a flow chart of a test execution process, and first, the system will implement test environment deployment through a test fixture, and decouple the test execution process into a solidified module for model preparation, device commissioning, and model shutdown, and a configurable module for test script execution. Because the device can be reset only by restarting the model after tripping, the test script is divided into two types, one type is a test which cannot trigger the device to be locked and tripped after being executed, and the other type is a test which can trigger the device to be locked and tripped after being executed. After the execution of a single test script is finished, the running state of the device can be checked through serial port or network cable communication, if the device runs normally, and no alarm or fault exists, the next script can be executed without restarting the model and carrying out the operation of resetting and commissioning the device.
Analysis and recording of test results: the master control server acquires all feedback information and test results, the feedback information comprises an SVG product to be tested and an RT-LAB host, the SVG product to be tested can feed back event records, displacement information, recording data and the like generated in the test process, the RT-LAB host can record analog quantity output waveforms of each channel of the system before and after a fault occurs, displacement information of action contacts of equipment to be tested and the like, the master control server compares and judges the feedback information and the test results with expected results to realize closed-loop test, when the difference between the test results and the expected results meets a passing criterion, a test passing conclusion is obtained, otherwise, a test failure conclusion is obtained and stored in the database server;
the expected result is stored in the database server, namely after the test is finished, the main control server is used for referring to a group of data which is used for comparing whether the test result of the SVG product to be tested is correct or not, wherein the group of data comprises contact point action information, event record, wave recording information and the like of the SVG product to be tested.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many variations or modifications may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is therefore defined by the appended claims.
Claims (4)
1. An automatic test platform of high-pressure SVG product based on RT-LAB, its characterized in that: the system comprises a master control server, wherein the master control server is connected with a database server, an SVN server, a version construction server and an RT-LAB host, the RT-LAB host is connected with a plurality of SVG products to be tested sequentially through a power amplifier and a wire changing tool, the database server is used for storing test parameters, the SVN server is used for storing test scripts, the version construction server is used for compiling SVG product source codes to generate a program package, the wire changing tool is set as a device with a large amount of switching value output and used for switching loops of secondary analog quantity and switching value, the master control server controls the RT-LAB host to simulate various test working conditions of the SVG products to be tested by reading data in the version construction server, the database server and the SVN server, tests the SVG products to be tested and simultaneously acquires feedback information of the SVG products to be tested, and storing the test result to the database server.
2. The automated testing platform for RT-LAB based high-voltage SVG products of claim 1, wherein: the test script comprises an SVG device parameter configuration file, a platform test environment configuration file, a test execution script file and an RT-LAB host system model file;
the test parameters comprise a program version of the SVG device to be tested, fixed value parameters, values of test input quantity and expected test results;
the test execution script file is a program file which is developed by a test case through a Python language and can be executed by a computer; the test input quantity comprises voltage and current analog quantity output by the power amplifier and a switching value signal output by the RT-LAB host;
the master control server is used for reading the test script and the test parameters, executing the test script, controlling the RT-LAB host to output small signals, generating secondary analog quantity signals through the power amplifier, and switching the secondary analog quantity signals to the SVG product to be tested through the wire changing tool.
3. The automated testing platform for RT-LAB based high-voltage SVG products of claim 1, wherein: the master control server refers to the RtlabApi file to realize calling of an API (application program interface) of the RT-LAB host, and directly calls a function of the RT-LAB host by using a Python code to realize simulation of various working conditions of the system and wave recording analysis of system data.
4. The automated testing platform for RT-LAB based high-voltage SVG products of claim 2, wherein: the test scripts are classified and managed according to the universality and reusability of the test scripts; the test working conditions comprise a system voltage high-penetration test, a system voltage low-penetration test, a frequency penetration test and an action performance test of the SVG equipment to be tested under the typical fault of the power system.
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