CN111524429A - System and method for power system communication and protocol experiment - Google Patents
System and method for power system communication and protocol experiment Download PDFInfo
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- CN111524429A CN111524429A CN202010251918.9A CN202010251918A CN111524429A CN 111524429 A CN111524429 A CN 111524429A CN 202010251918 A CN202010251918 A CN 202010251918A CN 111524429 A CN111524429 A CN 111524429A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/188—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for motors; for generators; for power supplies; for power distribution
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/18—Protocol analysers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
Abstract
The invention discloses a system and a method for power system communication and protocol experiments, which comprises a cloud platform, master station software, communication access equipment and practical training workstations, wherein the cloud platform is in communication connection with the master station software; the cloud platform is used for generating an experiment course, importing an experiment class roster and performing a grouping distribution experiment; the main station software is used for receiving experiment distribution information of the cloud platform and distributing corresponding experiment project topology according to the experiment distribution information; the practical training workstation is used for acquiring an experiment guidance flow and carrying out protocol code development experiment operation according to the experiment guidance flow; the invention has the advantages that: the students can effectively link the automatic professional knowledge of the electric power system to be learned with the specific application.
Description
Technical Field
The invention relates to the field of electricity, in particular to a system and a method for power system communication and protocol experiment.
Background
Higher education is an important sign of the development level and the development potential of the country, and the important theoretical light practice, the important subject light technology and the single talent culture mode for the heavy research light application, namely the so-called ivory tower type education mode, exist in the higher education of China for a long time, and the application type and the adaptive talent culture required for the local economic construction are lacked. To change this phenomenon, the national ministry of education introduced a major innovation project "superior engineer education program". The aim is to develop and create a large number of high-quality various engineering technical talents which have strong innovation capability and are suitable for the development needs of the economic society facing the industry, the world and the future, and establish a solid human resource advantage for constructing innovative countries and realizing industrialization and modernization to enhance the core competitiveness and the comprehensive national strength of China.
At present, the major directions related to the power system of colleges and universities are mainly intelligent power grid information engineering, electrical engineering and automation, basic theoretical knowledge related to major courses covers comprehensively and explains various technical theory principles in detail, and theoretical subject research of teachers and students is met. However, since the technical theory of the power system needs to be developed around the power line in practical application, primary equipment such as transmission and transformation and the like is involved in building the system, cost and safety factors are considered, and an experimental system for students to participate in cannot be built in a laboratory of a school, the course experimental design method for the specialty of the colleges and universities is mainly as follows:
1) based on the simulation design of common simulation software Matlab/Simulink, PSCAD/EMTDC and PSASP of the power system, students design power topology and data simulation in software according to experimental requirements, and verify whether the design is reasonable. Chinese patent publication No. CN107247418A discloses a dynamic simulation experiment platform device for an electric power system, which comprises a valve base controller, a unit simulation and control module, a digital simulator interface module, an upper computer and a real-time digital simulator. The valve base controller is sequentially connected with the unit simulation and control module, the digital simulator interface module and the real-time digital simulator through high-speed optical fibers, and the digital simulator interface module is also connected with an upper computer through an Ethernet. The simulation valve tower structure of the power unit is built in a combination mode of a plurality of unit simulation and control modules, the unit control panels of the power unit and the electronic and mechanical characteristics of the power unit are simulated, the simulation experiment platform device not only can realize conventional dynamic simulation experiments of the power system, but also can simulate various characteristics of the power unit, simulate various faults of the power unit, and solve and make up the defects of response and test of the unit-level faults in the existing system of a dynamic simulation experiment platform.
2) And verifying and observing whether the logic flow of the corresponding technical principle is correct or not based on the power system protection principle configuration of the relay protection testing device.
3) The secondary terminal of the power system is designed based on the microcontroller of the single chip microcomputer and embedded software, and the application type conversion of the theoretical knowledge of the electrical specialty is mastered.
Analysis shows that the method 1) aims at theoretical simulation and has no engineering practice guidance. Method 2) is a single device operation without system level technical experimentation. The design of the method 3) is established by mastering the development and use of embedded software, hardware circuit design, programming language, microcontroller technology and other designed functional module technology, the preparation and mastering of the technology occupy most of experimental time in limited course experimental time, but the electrical professional knowledge serving as the experimental purpose is inverted at the end, and the teaching effect is poor, so that the automatic professional knowledge of the electric power system in the colleges and universities cannot be effectively connected with the specific application by students in the current course experiments related to the electric power system. Meanwhile, due to the particularity of the power system, operation experiments cannot be carried out on a running line, students cannot understand the association between the learning and the use through training practice in companies like other professional technologies after walking on a work post, and the running-in of the technologies and the applications needs to be carried out for a long time.
Disclosure of Invention
The technical problem to be solved by the invention is how to make students understand the association between the study and the use through the system and the method of power system communication and protocol experiment, and effectively make the students link the automation professional knowledge of the study power system with the specific application.
The invention solves the technical problems through the following technical means: a system for power system communication and protocol experiments comprises a cloud platform, master station software, communication access equipment and practical training workstations, wherein the cloud platform is in communication connection with the master station software, the master station software is in communication connection with the communication access equipment in a power system communication protocol mode, a plurality of practical training workstations are provided, and the communication access equipment is in communication connection with the practical training workstations through a communication network respectively; the cloud platform is used for generating an experiment course, importing an experiment class roster and performing a grouping distribution experiment; the main station software is used for receiving experiment distribution information of the cloud platform and distributing corresponding experiment project topology according to the experiment distribution information; the training workstation is used for obtaining an experiment guidance process and carrying out protocol code development experiment operation according to the experiment guidance process.
The invention takes the technology of communication and specification penetrating through the automatic system of the electric power system as a starting point, the course experiment system covers the core technical system of the electric power system such as main station software, a communication network, and a device terminal of a practical training workstation, and the non-electric power system professional technical knowledge is hidden through manual operation and code development related to data information of the electric power system, the technical knowledge of the purpose of the course experiment is highlighted, students can master the complete flow of the automatic specific application of the electric power system, understand the association between the learning and the using, and effectively connect the automatic professional knowledge of the electric power system with the specific application.
Preferably, the master station software is further configured to acquire experimental data of the practical training workstation and upload an experimental data result to the cloud platform.
Preferably, the cloud platform is further configured to give an experiment assessment result according to the accuracy of the experiment value and the expected value in the experiment result and the duration of the experiment.
Preferably, the generation process of the experimental course is as follows: firstly, setting the name of an experimental course, selecting the type of a terminal, selecting the type of a protocol, selecting three remote data items, then setting the expected value of the selected data items, selecting the communication mode and generating an experimental project.
Preferably, the communication means includes ethernet, power carrier, wireless, and optical fiber.
Preferably, the protocol code development design process is as follows:
the method comprises the following steps: extracting a typical frame capable of representing each protocol;
step two: different protocols edit message frames one by one according to the format of protocol type + frame number + typical frame, and then the message frames are stored in a file format; the cloud platform side stores a file name P _ FRAME, and the intelligent integrated terminal side stores a file name T _ FRAME;
step three: the cloud platform side reads message FRAMEs in the P _ FRAME file according to a bar and sends the message FRAMEs, the reply of the intelligent integrated terminal side is waited after the message FRAMEs are sent, after the message replied by the intelligent integrated terminal side is received, typical FRAME format verification and three-remote data item verification are carried out, and if the typical FRAME format verification and the three-remote data item verification are both correct, the typical FRAME message protocol code is related to and meets the requirements.
Preferably, the intelligent integrated terminal side is integrated on the practical training workstation.
Preferably, the third step further comprises: after receiving a message FRAME sent by a cloud platform side, an intelligent integrated terminal side acquires a protocol type and a FRAME number in the message FRAME, reads a T _ FRAME file, searches a corresponding typical FRAME through the FRAME number, acquires three-remote data item information in the typical FRAME, acquires three-remote data acquired by the intelligent integrated terminal side in real time according to the three-remote data item information, integrates the typical FRAME according to a protocol specified by the protocol type, forms a complete message FRAME, sends the complete message FRAME to the cloud platform, and realizes communication interaction with the cloud platform.
Preferably, the intelligent integrated terminal side stores a file of a file name T _ FRAME through a USB transmission manner.
The invention also provides a system and method for power system communication and protocol experiment, wherein the method comprises the following steps: the cloud platform generates an experiment course, imports an experiment class roster, and performs a grouping distribution experiment; the method comprises the steps that a master station software receives experiment distribution information of a cloud platform, and corresponding experiment project topology is distributed according to the experiment distribution information; and the practical training workstation acquires an experiment guidance flow and performs protocol code development experiment operation according to the experiment guidance flow.
The invention has the advantages that: the invention takes the technology of communication and specification penetrating through the automatic system of the electric power system as a starting point, the course experiment system covers the core technical system of the electric power system such as main station software, a communication network, and a device terminal of a practical training workstation, and the non-electric power system professional technical knowledge is hidden through manual operation and code development related to data information of the electric power system, the technical knowledge of the purpose of the course experiment is highlighted, students can master the complete flow of the automatic specific application of the electric power system, understand the association between the learning and the using, and effectively connect the automatic professional knowledge of the electric power system with the specific application.
Drawings
Fig. 1 is a system architecture diagram of a power system communication and protocol experiment according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating an experiment course editing process of a system for power system communication and protocol experiments according to an embodiment of the present invention;
fig. 3 is a flowchart of a software work flow of a master station of a system for power system communication and protocol experiments according to an embodiment of the present invention;
fig. 4 is a flow chart of a cloud platform side software design of a system for power system communication and protocol experiments according to an embodiment of the present invention;
fig. 5 is a flowchart of software processing at an intelligent integrated terminal side of a system for power system communication and protocol experiments according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. 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 invention.
As shown in fig. 1, a system for power system communication and protocol experiments includes a cloud platform, master station software, communication access equipment, and practical training workstations, wherein the cloud platform is in communication connection with the master station software, the master station software is in communication connection with the communication access equipment in a power system communication protocol mode, the practical training workstations are provided with a plurality of communication access equipment, and the communication access equipment is respectively in communication connection with the practical training workstations through a communication network; the cloud platform is used for generating an experiment course, importing an experiment class roster and performing a grouping distribution experiment; the main station software is used for receiving experiment distribution information of the cloud platform, distributing corresponding experiment project topology according to the experiment distribution information, simulating an electric power system main station, displaying an electric power system terminal equipment topology system, supporting an electric power system mainstream protocol, and realizing electric power system communication flow and protocol detection and verification, wherein the mainstream protocol is modbus, dlt645,101/104 and GB/T26865.2-2011 protocol. The practical training workstation is used for acquiring an experiment guidance process, carrying out protocol code development experiment operation according to the experiment guidance process, and integrating the intelligent comprehensive terminal equipment of the power system and the communication terminal equipment in the practical training workstation. The main station software is further used for acquiring experimental data of the practical training workstation and uploading experimental data results to the cloud platform, and the cloud platform is further used for giving out experimental assessment results according to the accuracy of experimental values and expected values in the experimental results and the duration of the experiment. The communication modes of the invention include Ethernet, power carrier, wireless and optical fiber.
As shown in fig. 2, the process of generating the experimental course is as follows: firstly, setting the name of an experimental course, selecting the type of a terminal, selecting the type of a protocol, selecting three remote data items, then setting the expected value of the selected data items, selecting the communication mode and generating an experimental project.
After course editing is completed, class information of experiment courses needing to be developed is imported, experiment grouping is completed, the cloud platform sends the information to the master station software in a form shown in table 1, and the master station software acquires and stores the experiment course information.
Table 1 class information table for completing experiment distribution at cloud platform end
| College of academic | Professional class | Group number | Number learning | Name (I) | Information of experimental course |
When a student performs an experiment, the student logs in the master station software, the working process of the master station software is as shown in fig. 3, whether the student distributes course experiments through a cloud platform is judged, after the authority of the student is determined, the topology of the distributed experiment items is displayed, the type and the protocol configuration of the intelligent integrated terminal of the power system are performed, and the corresponding secondary terminal is displayed on the position of a line switch or the position of a switch station of the topological graph of the master station according to the content of Ttype. Subsequently, communication-related data configuration, such as COM, data items and corresponding expected values, is completed. After the configuration is completed, the software waits for the students to do manual practice.
In the development of protocol codes, in order to concentrate on the aspect of protocol protocols for the technology that students' experiments relate to, the mutual collection and basic communication program have been developed in the intelligent integrated terminal of the electric power system, the students edit the corresponding frame format according to the protocol formats of the protocol of study according to the experiment guidance flow, and the protocol code development design flow is:
the method comprises the following steps: extracting a typical frame capable of representing each protocol;
step two: different protocols edit message frames one by one according to the format of the protocol type (Ptype), the frame number (Fnum) and the typical frame, and the message frames are stored in a file format after the message frames are finished; the cloud platform side stores a file name P _ FRAME, and the intelligent integrated terminal side stores a file name T _ FRAME;
step three: as shown in fig. 4, the cloud platform side reads and sends the message FRAMEs in the P _ FRAME file by strip, waits for the reply of the intelligent integrated terminal side after sending, and performs typical FRAME format verification and triple-remote data item (Dindex) verification after receiving the message replied by the intelligent integrated terminal side, where the typical FRAME format verification and triple-remote data item verification are both correct, and then the typical FRAME message protocol code is related to and meets the requirements.
Taking a typical frame of 101 as an example, the file format is as follows,
summoning data in P _ FRAME file:
| type of protocol |
| Frame numbering |
| Start character |
| Message length L |
| Message length L |
| Start character |
| Control Domain C |
| Address field A |
| Application Service Data Unit (ASDU) |
| Type identifier TI |
| Variable structure qualifier VSQ |
| Transmission cause COT |
| ASDU public address |
| Information object address |
| Call qualifiers QOI |
| Frame checksum CS |
| Ending character |
Response summons data in the T _ FRAME file:
the system building part is used for verifying whether the developed protocol codes are correct or not, after the operation of the practical training cabinet is completed manually, the power system intelligent integrated terminal in the practical training cabinet reads typical frame format data with the same frame number in the file, corresponding alternate acquisition data and check codes are filled, and the alternate acquisition data value is a data value configured by a signal source. The main process is as follows: as shown in fig. 5, after receiving a message FRAME sent by a cloud platform side, an intelligent integrated terminal side acquires a protocol type and a FRAME number in the message FRAME, reads a T _ FRAME file, searches for a corresponding typical FRAME through the FRAME number, acquires triple-remote data item information in the typical FRAME, acquires triple-remote data acquired by the intelligent integrated terminal side in real time according to the triple-remote data item information, integrates the typical FRAME according to a protocol specified by the protocol type, forms a complete message FRAME, and sends the complete message FRAME to the cloud platform to realize communication interaction with the cloud platform. The intelligent integrated terminal side stores files of a file name T _ FRAME in a USB transmission mode.
The method comprises the steps that a master station software receives a protocol frame sent by an intelligent integrated terminal of the power system, analyzes an experimental data value, verifies through three modes, verifies whether a logic flow of a protocol is correct through a protocol verification function, and grasps a protocol format and data stream transmission in an actual power system automation system; through remote measurement data verification, the field real-time data collection application in the automation of the power system is mastered; and the students can master the application of the automatic protection action of the power system through remote control operation verification. Among them, the three verification methods belong to the prior art and are not described herein.
If the format of the protocol of the student experimental development is correct, reading the data value in the response frame, comparing with the expected value given in the experimental guidance process, the format is shown in table 2, judging the performance of the group of the experimental course according to the correct number of the data values and the experimental spent time, for example, the accuracy is more than 90% and is excellent within one hour, the accuracy is 80-90% and is good within 2 hours, the accuracy is 70-80% and is medium within 2 hours, the other is unqualified, the accuracy is 100 points, the accuracy is 90 points, the medium is 80 points, the unqualified is 70 points, combining the teacher self-defined performance, forming the final experiment through weight distribution, such as the format of table 3, completing the experimental course process, such as the teacher self-defined performance 60, and the ratio of the teacher self-defined performance to the system assessment is 8:2, the excellent student performance is 92, and the performance of each student can be automatically generated by the system through a formula, which is not illustrated.
Table 2 experimental data results table
Table 3 course score checking table
The present invention also provides a method for a system of power system communication and protocol experiment, the method process has been described above in detail, and briefly summarized here, the method comprises: the cloud platform generates an experiment course, imports an experiment class roster, and performs a grouping distribution experiment; the method comprises the steps that a master station software receives experiment distribution information of a cloud platform, and corresponding experiment project topology is distributed according to the experiment distribution information; and the practical training workstation acquires an experiment guidance flow and performs protocol code development experiment operation according to the experiment guidance flow.
According to the technical scheme, the system and the method for power system communication and protocol experiments provided by the invention take the technology of communication and protocol penetrating through a power system automation system as a starting point, a course experiment system covers a power system core technology system such as master station software, a communication network and a device terminal of a practical training workstation, and non-power system professional technical knowledge is hidden and technical knowledge of the course experiment purpose is highlighted by surrounding manual operation and protocol code development related to power system data information, so that students can master the complete process of power system automation specific application, understand the association between learning and using, and effectively link the power system automation professional knowledge with the specific application.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A system for power system communication and protocol experiments is characterized by comprising a cloud platform, master station software, communication access equipment and practical training workstations, wherein the cloud platform is in communication connection with the master station software, the master station software is in communication connection with the communication access equipment in a power system communication protocol mode, the practical training workstations are provided with a plurality of the practical training workstations, and the communication access equipment is in communication connection with the practical training workstations through a communication network respectively; the cloud platform is used for generating an experiment course, importing an experiment class roster and performing a grouping distribution experiment; the main station software is used for receiving experiment distribution information of the cloud platform and distributing corresponding experiment project topology according to the experiment distribution information; the training workstation is used for obtaining an experiment guidance process and carrying out protocol code development experiment operation according to the experiment guidance process.
2. The system for power system communication and protocol experiments according to claim 1, wherein the master station software is further configured to obtain experimental data of the practical training workstation and upload experimental data results to the cloud platform.
3. The system for power system communication and protocol experiments according to claim 2, wherein the cloud platform is further configured to give the experiment assessment results according to the accuracy of the experiment values and the expected values in the experiment results and the duration of the experiment.
4. The system for power system communication and protocol experiment as claimed in claim 1, wherein the experiment course is generated by: firstly, setting the name of an experimental course, selecting the type of a terminal, selecting the type of a protocol, selecting three remote data items, then setting the expected value of the selected data items, selecting the communication mode and generating an experimental project.
5. The system of claim 4, wherein the communication means comprises Ethernet, power line carrier, wireless, and fiber optic.
6. The system for power system communication and protocol experiments according to claim 1, wherein the protocol code development and design process comprises:
the method comprises the following steps: extracting a typical frame capable of representing each protocol;
step two: different protocols edit message frames one by one according to the format of protocol type + frame number + typical frame, and then the message frames are stored in a file format; the cloud platform side stores a file name P _ FRAME, and the intelligent integrated terminal side stores a file name T _ FRAME;
step three: the cloud platform side reads message FRAMEs in the P _ FRAME file according to a bar and sends the message FRAMEs, the reply of the intelligent integrated terminal side is waited after the message FRAMEs are sent, after the message replied by the intelligent integrated terminal side is received, typical FRAME format verification and three-remote data item verification are carried out, and if the typical FRAME format verification and the three-remote data item verification are both correct, the typical FRAME message protocol code is related to and meets the requirements.
7. The system for power system communication and protocol experiments according to claim 6, wherein the intelligent integrated terminal is integrated on the practical training workstation.
8. The system for power system communication and protocol experiments according to claim 6, wherein the third step further comprises: after receiving a message FRAME sent by a cloud platform side, an intelligent integrated terminal side acquires a protocol type and a FRAME number in the message FRAME, reads a T _ FRAME file, searches a corresponding typical FRAME through the FRAME number, acquires three-remote data item information in the typical FRAME, acquires three-remote data acquired by the intelligent integrated terminal side in real time according to the three-remote data item information, integrates the typical FRAME according to a protocol specified by the protocol type, forms a complete message FRAME, sends the complete message FRAME to the cloud platform, and realizes communication interaction with the cloud platform.
9. The system for electric power system communication and protocol experiments according to claim 6, wherein the intelligent integrated terminal side stores a file with a file name of T _ FRAME through a USB transmission mode.
10. The method of a system of power system communication and protocol experimentation according to any one of claims 1 to 9, wherein the method comprises: the cloud platform generates an experiment course, imports an experiment class roster, and performs a grouping distribution experiment; the method comprises the steps that a master station software receives experiment distribution information of a cloud platform, and corresponding experiment project topology is distributed according to the experiment distribution information; and the practical training workstation acquires an experiment guidance flow and performs protocol code development experiment operation according to the experiment guidance flow.
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