CN105810065A - Microcomputer transformer protection teaching device - Google Patents
Microcomputer transformer protection teaching device Download PDFInfo
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- CN105810065A CN105810065A CN201610309482.8A CN201610309482A CN105810065A CN 105810065 A CN105810065 A CN 105810065A CN 201610309482 A CN201610309482 A CN 201610309482A CN 105810065 A CN105810065 A CN 105810065A
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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
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Abstract
The invention relates to the field of a teaching device, and discloses a microcomputer transformer protection teaching device. The microcomputer transformer protection teaching device comprises a human-computer interface system, a main controller, a PC (Personal Computer), a secondary development PC and a microcomputer transformer, wherein a conversion module is arranged between the microcomputer transformer and the main controller; the human-computer interface system is used for setting the operation parameters and the operation mode, and displays the operation state curve of a current protection device in real time; the PC and the main controller are mutually communicated through an Ethernet module; the secondary development PC transmits an edited program to an auxiliary controller through a control module, and the auxiliary controller and the main controller perform data interaction; and the main controller performs system setting according to the setting of the human-computer interface system, runs the program according to the received program, and performs security signal detection and device switching on and off operations. The microcomputer transformer protection teaching device belongs to a set of multi-machine interconnected microcomputer protection device system comprehensive experimental platform, and promotes the development of electric automatic teaching and electrical engineering subjects to a great degree.
Description
Technical field
The present invention relates to instructional device field, particularly relate to a kind of computer-based transformer protection instructional device.
Background technology
Experimental teaching is one of science and engineering universities and colleges Important Teaching Details, and it has irreplaceable effect in strengthening personnel training, improving peopleware and promote discipline development.For the experiment in experimental teaching, Teaching Equipment, it has high professional and novelty, needs the latest development trend of this specialty of tight tracking, industry technology, develops the professional teaching equipment adapting to subject and industry development.In micro-capacitance sensor teaching field computer-based transformer protection direction, most of teaching equipments of present stage can not meet the latest development trend of power industry, has badly influenced the development of electric power teaching and electrical engineering subject.It mainly faces following problem:
1, current most instructional device; particularly integrated significantly high equipment, such as computer-based transformer protection device, what most universities and colleges adopted is the equipment of industry spot use; although this integrates with mutually with actual production one line, but there is a serious problem here.What our universities and colleges should cultivate is have the innovative talent, rather than operative employee, if the training objective of country is all manipulation type workman, the future of country is where！For my company of situation of this sternness specially develop core protection can secondary development type computer-based transformer protection device, the Algorithm for Training in convenient teaching, and the low level development that student is to computer-based transformer protection device.
2, experimental provision controller instruction set is abundant not; lack operating system support; experiment underaction; especially that the control technology reflection that Microcomputer Protection is new is little; it is poor in the intellectuality controlled, networking and combination property; cannot adapt to the demand of Power System Intelligent, control based on network, it is impossible on equipment, carry out the secondary development of teaching and scientific research.
3, in experimentation, the observation of dynamic process is extremely difficult.Experimental system lacks high-performance data acquisition system, the dynamic waveform of each key point cannot be carried out Real Time Observation and storage, it is difficult to waveform is carried out precision com-parison and analysis, causes that experiment content and principle cannot be carried out deep understanding by student, affect experiment teaching effect.
Summary of the invention
The present invention is actually needed and solves the technical problem that and be: for the deficiency of existing Teaching Equipment, develop a set of increasingly automated, integrated, the open microcomputer protecting device system synthesis experiment porch with multimachine interconnection, it can reflect the soft of modern microcomputer protecting device, the overall process of hardware designs, fully demonstrate the opening of modern microcomputer protecting device, automatization, information-based, digitized feature, realize the detection of microcomputer protecting device, control, monitor, protection, the automatization of scheduling, promote the development of power automation teaching and electrical engineering subject largely.
In order to solve above-mentioned technical problem, the present invention is addressed by following technical proposals.
A kind of computer-based transformer protection instructional device; including human-computer interface system, master controller, PC, secondary development PC and microcomputer transformer; modular converter it is provided with between microcomputer transformer and master controller; modular converter is used for three-phase current collection in microcomputer transformer and converts data to, feeds back to master controller；Human-computer interface system is used for arranging operational factor and operational mode the plant running condition curve of the current protection of display in real time；Mutual communication is carried out by ethernet module between PC and master controller；Secondary development PC, by controlling module, controls module and includes pilot controller, and secondary development PC is for carrying out data interaction by the program transportation editted to pilot controller, pilot controller and master controller；Operational factor and operational mode that master controller is arranged according to human-computer interface system carry out default, and master controller is according to the program received and runs program, and microcomputer transformer carries out safety signal detection and the operation of splitting or integrating brake gear.
As preferably, human-computer interface system adopts WINDOWS-CE embedded system and shows by touching display screen.
As preferably, secondary development PC is edited run program by programmable device.
As preferably, carrying out communication data transmission by Modbus communication protocol between human-computer interface system and master controller.
As preferably, master controller is connected by Com serial ports with ethernet module.
As preferably, modular converter includes data collecting card and computing CPU, and data collecting card is acquired data to carry out computing by computing CPU and draw instantaneous value and be back to master controller, and master controller shows real time data by human-computer interface system.
As preferably, Ethernet adopts MODBUS-TCP communications protocol and DMA communication mode.
As preferably, pilot controller adopts embedded STM32 chip, as protocal analysis processor and the headend of Ethernet data conversion.
Due to the fact that and have employed above technical scheme, there is significant technique effect: this invention is a set of increasingly automated, integrated, the open microcomputer protecting device system synthesis experiment porch with multimachine interconnection, it can reflect the soft of modern microcomputer protecting device, the overall process of hardware designs, fully demonstrate the opening of modern microcomputer protecting device, automatization, information-based, digitized feature, realize the detection of microcomputer protecting device, control, monitor, protection, the automatization of scheduling, promote the development of power automation teaching and electrical engineering subject largely.
The present invention adopts MODBUS-TCP agreement and configuration software to communicate; the communication between configuration software and microcomputer protecting device can be learnt teaching field student; and the configuration of function, realized and teaching platform ipc monitor the management Real Data Exchangs of software, transmission by MODBUS-TCP technology.The protection device being distributed in system is carried out real time data acquisition, processes and carries out security monitoring mainly through SCADA by teaching platform ipc monitor management software, realizes the digital integral of whole teaching platform is managed by Ethernet.Three set software coordinates work, realizing on experimental provision basic experiment function basis, by the pioneering Intelligent touch man machine interface in the field of business of WindowsCE technology, realized and teaching platform ipc monitor the management Real Data Exchangs of software, transmission by ModbusTCP technology.Effective combination of software and embedded software is managed, it is achieved that the core protection type secondary development during the intellectuality of Microcomputer Protection SCADA system, networking, precision are controlled and imparted knowledge to students by teaching platform ipc monitor.
Accompanying drawing explanation
Fig. 1 is one computer-based transformer protection instructional device schematic flow sheet of the present invention；
Fig. 2 is three-phase voltage Acquisition Circuit figure in one computer-based transformer protection instructional device of the present invention；
Fig. 3 is three-phase current phase detecting circuit figure in one computer-based transformer protection instructional device of the present invention；
Fig. 4 is ethernet controller communication structure figure in one computer-based transformer protection instructional device of the present invention；
Fig. 5 is three-phase current Acquisition Circuit figure in one computer-based transformer protection instructional device of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
As shown in Figure 1; a kind of computer-based transformer protection instructional device; including human-computer interface system, master controller, PC, secondary development PC and microcomputer transformer; modular converter it is provided with between microcomputer transformer and master controller; modular converter is used for three-phase current collection in microcomputer transformer and converts data to, feeds back to master controller；Human-computer interface system is used for arranging operational factor and operational mode the plant running condition curve of the current protection of display in real time；Mutual communication is carried out by ethernet module between PC and master controller；Secondary development PC, by controlling module, controls module and includes pilot controller, and secondary development PC is for carrying out data interaction by the program transportation editted to pilot controller, pilot controller and master controller；Operational factor and operational mode that master controller is arranged according to human-computer interface system carry out default, and master controller is according to the program received and runs program, and microcomputer transformer carries out safety signal detection and the operation of splitting or integrating brake gear.
Human-computer interface system adopts WINDOWS-CE embedded system and shows by touching display screen.
Secondary development PC is edited run program by programmable device.
Communication data transmission is carried out by Modbus communication protocol between human-computer interface system and master controller.
Master controller is connected by Com serial ports with ethernet module.
Modular converter includes data collecting card and computing CPU, and data collecting card is acquired data to carry out computing by computing CPU and draw instantaneous value and be back to master controller, and master controller shows real time data by human-computer interface system.
Ethernet adopts MODBUS-TCP communications protocol and DMA communication mode.
Pilot controller adopts embedded STM32 chip, as protocal analysis processor and the headend of Ethernet data conversion.
This protection device man machine interface adopts WINDOWS-CE embedded system, and protective underlayer adopts UCOS-II real time operating system to realize the measurement of three-phase voltage, electric current, phase angle, and the correction of phase place calculates and the realization of defencive function.The control of this controller, adjustment, supervision; there are abundant software function module, perfect detection and defencive function, and adopt the touch screen technology running WindowCE graphical system to complete three-phase current collection, systematic parameter correction, breaking protection, light gas, grave gas, high oil temperature, super oil temperature, difference current speed, secondary harmonic brake, ratio brake and the defencive function compositions such as ratio brake of prescribing a time limit.
Systemic-function: include master controller parameter and arrange, measures correcting current, protection system short-circuit phase measurement, the setting of protected transformer ' s type, measuring transformer broken string alarm etc..
Switching value is protected: light transformer gas carries out alarm prompt, Transformer Heavy Gas carries out trip protection, transformator high oil temperature carries out alarm prompt, the super oil temperature of transformator carries out trip protection.
Differential velocity is protected: the change of the former secondary current of measuring transformer carries out differential current computing, arranges corresponding differential quick-break time and quick-break threshold value, it is achieved fast differential over current protection transformer-supplied trip protection.
Secondary harmonic brake: when Transformer Close, also has multiple harmonic except first-harmonic 50Hz, and secondary harmonic brake is by detecting second-harmonic power ratio, when measured value is more than setting threshold value, and transformer-supplied trip protection.
Ratio brake is protected: the former secondary current of measuring transformer, calculates action current and stalling current according to ratio brake coefficient, arranges corresponding ratio brake quick-break time and quick-break threshold value, it is achieved ratio brake differential protection, open failure transformer-supplied power supply.
Remotely control: realize PC by ethernet communication and the remotely monitoring of microcomputer protecting device and defencive function arranged parameters revision etc..
Man machine interface: host computer passes through standard industry Modbus communications protocol, it is achieved controller with based on Windows-CE touch screen communication, in real time display phase current and the data such as difference current, ratio brake electric current.
Coordinating communication: program analyzes the data between master controller and secondary development pilot controller, resolves the data protocol between secondary development pilot controller and main controller；The data transmit-receive additionally master controller and Ethernet controlled between PC resolves, and the CRC data verification of DMA communication mode.
Secondary development: be familiar with secondary development software KEILMDK environment；Data protocol analysis between secondary development pilot controller and main controller；The design of defencive function.
Embodiment 1
As in figure 2 it is shown, transformer frequency response collection is 2mA/2mA voltage transformer by PT1, U phase voltage is connected through R4100K/1W resistance and PT1, out connects through R88100K/1W resistance and phase voltage N afterwards；R5 is that 250 Ω/0.5W resistance plays the effect converting electrical current into voltage, and R5 contacts through R21k/0.5W and C7, and C7 plays the effect of filtering, D1, D2 the two ends at C7 and plays amplitude limit, jamproof effect.Three-phase synchronous generator voltage acquisition scheme, is 2mA/2mA voltage transformer by PT3, and V phase voltage is connected through R12100K/1W resistance and PT3, out connects through R89100K/1W resistance and phase voltage N afterwards；R10 is that 250 Ω/0.5W resistance plays the effect converting electrical current into voltage, and R10 contacts through R141k/0.5W and C11, and C11 plays the effect of filtering, D5, D6 the two ends at C11 and plays amplitude limit, jamproof effect.
As shown in Figure 3; computer-based transformer protection phase-detection includes electric wave shaping circuit; described electric wave shaping circuit includes operational amplifier U1, comparator U2; alternating current U11 end is connected with one end of resistance R7; the other end of R7 is connected with the input upper end of current transformer PT2; alternating current N11 end is connected with one end of electric capacity C9; the other end of electric capacity C9 is connected with one end of resistance R91; the other end of resistance R91 is connected with the input lower end of current transformer PT2, output upper end and 2 feet of U1 of current transformer PT2, one end of resistance R1, electric capacity C1 one end be connected；7 feet of U1 are connected with one end of+15Va power end, electric capacity C5；Electric capacity C1 and the other end of resistance R1,6 feet of U1, resistance R9 one end be connected；Output lower end and 3 feet of U1 of current transformer PT2, one end of electric capacity C16, one end of electric capacity C5, one end of electric capacity C13, U2 1 foot and 3 feet, be connected GNDA, 4 feet of U1 are connected with one end of-15Va, electric capacity C16；The other end of resistance R9 is connected with 2 feet of one end of electric capacity C13, U2；8 feet of U2 are connected with one end of+15Va power end, electric capacity C6, the other end of electric capacity C6 and one end of electric capacity C10, are connected GNDa；7 feet of U2 are connected with the CON1 end of one end of resistance R11, CE3, and the other end of resistance R11 is connected with+15Va.
As shown in Figure 4, ethernet controller communication structure block diagram, adopt macroblock mode, systemic-function is carried out modularized design and ensure that stability and the reusability of system, clear function so can be made clear and definite, system is more reliable and stable.The control system COM1 by STM32F103VET6, communication mode adopts DMA communication mode, so decreases number of interruptions, alleviates the burden of CPU.W5200 ethernet controller STM32F103VET6 reads chip transmission of data with the working method of inquiry; and send commands to upper PC; upper PC controls to communicate with TCP_MODBUS communication protocol and Ethernet; the data that upper PC passes down are unpacked by STM32F103VET6 controller; then pass through COM port or COM device or COM1 and be handed down to system protection function control device; the data simultaneously also uploaded are packed, and then pass through WIZNETW5200 and send upper PC to.
In a word, these are only presently preferred embodiments of the present invention, all equalizations made according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (8)
1. a computer-based transformer protection instructional device; including human-computer interface system, master controller, PC, secondary development PC and microcomputer transformer; it is characterized in that: between microcomputer transformer and master controller, be provided with modular converter; modular converter is used for three-phase current collection in microcomputer transformer and converts data to, feeds back to master controller；Human-computer interface system is used for arranging operational factor and operational mode the plant running condition curve of the current protection of display in real time；Mutual communication is carried out by ethernet module between PC and master controller；Secondary development PC, by controlling module, controls module and includes pilot controller, and secondary development PC is for carrying out data interaction by the program transportation editted to pilot controller, pilot controller and master controller；Operational factor and operational mode that master controller is arranged according to human-computer interface system carry out default, and master controller is according to the program received and runs program, and microcomputer transformer carries out safety signal detection and the operation of splitting or integrating brake gear.
2. a kind of computer-based transformer protection instructional device according to claim 1, it is characterised in that: human-computer interface system adopts WINDOWS-CE embedded system and shows by touching display screen.
3. a kind of computer-based transformer protection instructional device according to claim 1, it is characterised in that: secondary development PC is edited run program by programmable device.
4. a kind of computer-based transformer protection instructional device according to claim 1, it is characterised in that: carry out communication data transmission by Modbus communication protocol between human-computer interface system and master controller.
5. a kind of computer-based transformer protection instructional device according to claim 1, it is characterised in that: master controller is connected by Com serial ports with ethernet module.
6. a kind of computer-based transformer protection instructional device according to claim 1; it is characterized in that: modular converter includes data collecting card and computing CPU; data collecting card is acquired data to carry out computing by computing CPU and draws instantaneous value and be back to master controller, and master controller shows real time data by human-computer interface system.
7. a kind of computer-based transformer protection instructional device according to claim 1, it is characterised in that: Ethernet adopts MODBUS-TCP communications protocol and DMA communication mode.
8. a kind of computer-based transformer protection instructional device according to claim 1, it is characterised in that: pilot controller adopts embedded STM32 chip, as protocal analysis processor and the headend of Ethernet data conversion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610309482.8A CN105810065A (en) | 2016-05-10 | 2016-05-10 | Microcomputer transformer protection teaching device |
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| CN201610309482.8A CN105810065A (en) | 2016-05-10 | 2016-05-10 | Microcomputer transformer protection teaching device |
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Cited By (2)
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| CN107481596A (en) * | 2017-07-17 | 2017-12-15 | 国网河北省电力公司培训中心 | A kind of power transformer Microcomputer Protection self-adapting simulation implementation method |
| CN107481599A (en) * | 2017-08-30 | 2017-12-15 | 中铁电气化局集团有限公司 | Microcomputer protecting device simulation system and method |
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