CN103761913B - A kind of method of work of Simulation of current transformer training system - Google Patents
A kind of method of work of Simulation of current transformer training system Download PDFInfo
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Abstract
The invention provides a kind of Simulation of current transformer training system and method for work thereof, described system comprises teacher's machine with projector equipment, the student's machine communicated to connect with teacher's machine, described student's machine comprises slave computer and current transformer detection simulation platform, the simulator that described current transformer detection simulation platform comprises controller, each current transformer of being connected with controller is tested.Utilize native system, after teacher explains, current transformer experiment can be carried out to student and connect.Operating voltage of the present invention and electric current be far smaller than true environment voltage and current, can be implemented under safe operating voltage, electric current as the training of student's current transformer test provides reliable safety guarantee.
Description
Technical field
The present invention relates to electric energy mutual-inductor field, particularly relate to a kind of Simulation of current transformer training system and method for work.
Background technology
Current domestic electric energy metering verification mobility of people is large, the renewal of knowledge is slow, professional knowledge and working level uneven, inter-disciplinary talent is on the low side, the technician grasping mutual inductor field detecting technology is less, have impact on normal testing, mainly because training set is more delayed, at present mainly with concentration theory training, lecture experiment, written exam and with the first-class training method of an on-the-spot band, all there is significant limitation, training efficiency is very low.
And the training in actual environment, because electric energy measuring equipment has high voltage, big current, potential safety hazard can be produced to the person and equipment, limit quality and the efficiency of training.
If can provide a kind of can operate under the condition of low pressure, small area analysis, and the current transformer training system of function and in appearance complete Reality simulation equipment, so, will be very favourable to safe operation during electric energy metering verification staff training.
Summary of the invention
For solving the problem, the invention provides a kind of Simulation of current transformer training system, comprising teacher's machine, some student's machines communicated to connect with teacher's machine, wherein,
Teacher's machine comprises host computer, the projector equipment be connected with host computer, current transformer detect entity platform; Described host computer is for controlling the communication of whole system, and the slave computer parameter realizing student's machine issues, current transformer training function; Described current transformer detects entity platform and comprises actual current lifting device, actual standard current transformer, actual tested current transformer, actual current Burden box, actual tester, actual pressure regulator;
Controller, pressure regulator, standard current transformer simulator, tested current transformer simulator, current lifting device simulator, mutual-inductor tester simulator, current loading case simulator that described student's machine comprises slave computer, communicates to connect with slave computer, each simulator described is all connected with controller, wherein
Described current loading case simulator is used for current loading case that is virtually reality like reality;
Described standard current transformer simulator is used for standard current transformer function that is virtually reality like reality;
Described tested current transformer simulator is used for the function of tested current transformer that is virtually reality like reality;
Described current lifting device simulator is used for the function of current lifting device that is virtually reality like reality;
Described mutual-inductor tester simulator is used for the function of mutual-inductor tester that is virtually reality like reality;
Each simulator described all has some simulation connection terminals, and described simulation connection terminal is for simulating the connection terminal function of entity;
Pressure regulator is connected with mutual-inductor tester simulator power unit by isolating transformer;
Controller is used for the signals collecting of the simulation connection terminal connections situation of each simulator, and is uploaded to the slave computer of its correspondence, and performs the steering order of slave computer transmission;
Slave computer is used for the parameter set each simulator controller sending controling instruction information, reception controller information upload, reception host computer, and carry out signal disposal and analysis, actual tests wiring condition is arranged on current transformer interface in the training of slave computer and shows in real time.
Preferably, described controller comprises a terminals driver output module, tail terminals Gather and input module, polarity and signal discrimination module, RS232 transceiver module, MCU module and power supply unit module; MCU module is connected with signal discrimination module is unidirectional with head terminals driver output module, tail terminals Gather and input module, polarity, is bi-directionally connected with RS232 transceiver module.Wherein,
The drive control signal that head terminals driver output module sends for receiving MCU module, applies low level to wiring the end of a thread to be judged;
Tail terminals Gather and input module is used for the line tail end signal scanning that achieves a butt joint, and inquires about the level state except waiting other wiring tail ends judged except wiring one by one;
Polarity and signal discrimination module for realizing the amplification of signal, and realize the analog to digital conversion of signal;
RS232 transceiver module is used for the Signal transmissions of tail terminals Gather and input module to host computer or by simulator extremely corresponding for the steering order information transmission of host computer;
MCU module is used for control head terminals driver output module drive and waits to judge terminal stud, and constantly scans the logic level signal of tail terminals Gather and input module, judges the break-make relation of wiring between each simulation connection terminal;
Power supply unit module is used for other each module for power supply.
Preferably, described host computer is provided with training and arranges current transformer interface, and described interface is divided into current mutual-inductor parameter setting area, current transformer nameplate viewing area, current transformer data area;
Described current mutual-inductor parameter setting area can arrange the supplemental characteristic of the current transformer of each student's machine, and described parameter comprises no-load voltage ratio, polarity, load, grade, error;
Described current transformer nameplate viewing area, for showing the setting value of parameters in real time;
Current transformer data area is fully loaded and underloading data according to the display in real time in time of the setting value of parameters;
Described host computer is also provided with current transformer verification wiring diagram interface;
Described slave computer is provided with training and arranges current transformer interface, and described interface is divided into current transformer connection graph region, region, surveillance zone, current transformer nameplate region;
The not wired wiring diagram of described current transformer connection graph region display current transformer, and the connection layout after wiring, represent with black line when student's wiring is correct, represent during wiring error with red line;
Region, described surveillance zone is followed the sample percentage tabular value, the ratio part that draw of actual tester and is followed the sample ratio difference, the angular difference part that draw of actual tester for showing dial gauge part and follow actual tester and to sample the angular difference value drawn;
The data value of the no-load voltage ratio that described current transformer nameplate region display teacher is arranged, load, grade.
Preferably, described student's machine has six.
The method of work of described Simulation of current transformer training system, comprises the following step:
Step 1: host computer loading current transducer check wiring diagram interface, utilizes projector, impart knowledge to students to student;
Step 2: host computer loads training and arranges current transformer interface, creates host computer multithreading Thread, data buffer maxPacket, NetworkStream stream, for long-range transmission data are prepared; The success of current transformer interface being set as loaded training, carrying out subsequent step, otherwise returning host computer homepage;
Step 3: teacher is arranged at the supplemental characteristic of current mutual-inductor parameter setting area to the current transformer of each student's machine of host computer;
Step 4: open first serial when slave computer loads training current transformer interface and be connected with actual tester, if success, then carry out subsequent step, otherwise return slave computer homepage;
Step 5: first serial is entrusted and monitored, the data of the actual tester of real-time sense;
Step 6: slave computer is opened second serial and is connected with controller, if open failure just return slave computer homepage immediately, if open successfully, carries out the following step;
Step 7: slave computer creates multithreading Thread, data buffer maxPacket, NetworkStream stream, for long-range reception data are prepared, creates second serial and entrusts monitoring, the data that real-time sense controller sends;
Step 8: supplemental characteristic is sent to each student's machine by NetworkStream stream by host computer, the host computer multithreading Thread of establishment monitors data;
Step 9: its multithreading Thread created of slave computer carries out reception and display parameter data to supplemental characteristic, and when teacher's machine sends data again, this multithreading Thread can monitor in real time and again receive data;
Step 10: the data monitored controller and send are monitored in the trust that slave computer training arranges region, the viewing area second serial at current transformer interface, data are received with int [] number2=newint [48] when data are different, and with the Split(of string) method decomposition data, by analyzing data, show by the mode of line every single line that each simulator connects in real time;
Step 11: after slave computer training arranges all wiring successes of the viewing area at current transformer interface, slave computer enables multithreading Thread, sends with NetworkStream stream the supplemental characteristic obtained from host computer;
Step: 12: student verifies current transformer, manual adjustments pressure regulator, the data that actual tester sends according to student's machine carry out processes and displays, and send the detailed data of dial gauge every bit to student's machine;
Step 13: the trust that slave computer enables first serial is monitored, when listening to actual tester buffer zone and having data, slave computer receives data, verifies, and verify unsuccessfully directly discard, verification succeeds is storage data then, reaches and receives data object;
Step: 14: decomposition data, obtains dial gauge, ratio, angular difference data, reaches the actual tester data object of display.
Preferably, in step 13, slave computer takes the verification mode of odd even, packet header 0x55, bag size to the data received, and verification succeeds array int [] number=newint [48] stores data.
Preferably, in step 9, the data of described slave computer display no-load voltage ratio, load, grade three parameters.
Preferably, in step 3, after all supplemental characteristics all set, the data after the current transformer data area display setting at the loading training current transformer interface of host computer, otherwise do not show.
Preferably, when slave computer listen to data buffer maxPacket change time, slave computer receives data again, store data, decomposition data, upgrade dial gauge, angular difference, than difference data, reach the dial gauge that upgrades in time in real time, angular difference, than difference data object.
Preferably, slave computer training arranges in the region, viewing area at current transformer interface, represents when each simulator wiring is correct with black line, represents during wiring error with red line.
Beneficial effect of the present invention is:
The present invention adopts Computer real time simulation, the work on the spot environment of analog current mutual inductor simulation calibrating to greatest extent, provide at the standard current transformer simulator of equipment appearance, function complete simulation material object, tested current transformer simulator, mutual-inductor tester simulator, current lifting device simulator, current loading case simulator, the operating voltage of whole system and electric current be far smaller than true environment voltage and current, can be implemented under safe operating voltage, electric current as student provides the training of current transformer to provide reliable safety guarantee.
Controller of the present invention meets the technical requirement of standard current transformer calibrating wiring simulation system or other similar simulation training systems completely, all electronic can be realized, judge the on off operating mode of simulation connection in real time, exactly, and in time, constantly by result data be uploaded to slave computer do wiring to the process further such as misinterpretation.
Slave computer can carry out test connection judgement to the simulation connection connection terminal of each simulator, and actual tests wiring condition can be shown on computers, excite student to the comprehension of work on the spot and actual operational capacity to greatest extent, rapid raising student operative skill, has stronger production practical significance.
accompanying drawing illustrates:
Fig. 1 is structured flowchart of the present invention.
Fig. 2 is the composition frame chart of student's machine.
Fig. 3 is the theory diagram of standard current transformer simulator.
Fig. 4 is the theory diagram of tested current transformer simulator.
Fig. 5 is the theory diagram of current loading case simulator.
Fig. 6 is the theory diagram of current lifting device simulator.
Fig. 7 is the theory diagram of mutual-inductor tester simulator.
Fig. 8 is controller principle modules figure.
Fig. 9 is the software principle block diagram of controller.
embodiment:
As shown in Figure 1, present system general structure is made up of 1 cover teacher machine, 6 cover student machines, ethernet network communication equipment, and wherein teacher's machine is the Control on Communication main frame of whole system, simultaneously also as the actual detection platform of laboratory verification mutual inductor; Student's machine is exactly the mutual inductor simulation calibrating device at function complete simulation scene.
(1) teacher's machine:
Teacher's machine comprises system principal computer (host computer), projector equipment, the current transformer detection entity platform of giving lessons of imparting knowledge to students.
Described projector equipment is used for the host computer interface of teacher's machine to project, and imparts knowledge to students to student.
Described entity platform comprises actual current lifting device, actual standard current transformer, actual tested current transformer, actual current Burden box, actual tester, actual pressure regulator, and connects by actual.
The communication of described PC control whole system, realizes the functions such as student's machine parameter issues, the teaching of mutual inductor rudimentary knowledge, also can detect in conjunction with current transformer the transformer error verification that entity platform carries out entity.Therefore, teacher's machine is the Control on Communication main frame of whole system, simultaneously as the actual detection platform of laboratory verification mutual inductor.
When " training " state, host computer can recall the current transformer verification wiring diagram itself had in computer, utilizes projector, imparts knowledge to students to student; The wiring condition of each simulator of described current transformer calibrator wiring diagram display exact connect ion.
Student accepts teaching and understands oneself and carry out wiring exercise, and receives teacher's machine monitoring.When student practises wiring voluntarily, described host computer is provided with training and arranges current transformer interface, and described training arranges current transformer interface and is divided into current mutual-inductor parameter setting area, current transformer nameplate viewing area, current transformer data area;
Described current mutual-inductor parameter viewing area can arrange the supplemental characteristic of the current transformer of each student's machine, and described parameter comprises no-load voltage ratio, polarity, load, grade, error;
Described current transformer nameplate viewing area, for showing the setting value of parameters in real time;
Current transformer data area is fully loaded and underloading data according to the display in real time in time of the setting value of parameters.
(2) ethernet network device
Described ethernet network device realizes the slave computer of each student's machine and the communication of teacher's machine.Host computer and 6 slave computers form a network system, host computer can have access to the display operating mode of slave computer in real time, under " training " state, host computer and projector equipment form special the giving lessons of teacher and comment on system, can carry out mutual inductor and examine and determine giving lessons and training of knowledge.
(3) student's machine
Described student's machine comprises a computing machine (slave computer) and current transformer detects anti-true platform, and described current transformer detection simulation platform comprises controller, pressure regulator, standard current transformer simulator, tested current transformer simulator, mutual-inductor tester simulator, current loading case simulator, current lifting device simulator.
Described slave computer is provided with training and arranges current transformer interface, and described interface is divided into current transformer connection graph region, region, surveillance zone, current transformer nameplate region;
The not wired wiring diagram of described current transformer connection graph region display current transformer, and the connection layout after wiring, represent with black line when student's wiring is correct, represent during wiring error with red line;
Region, described surveillance zone is followed the sample percentage tabular value, the ratio part that draw of actual tester and is followed the sample ratio difference, the angular difference part that draw of actual tester for showing dial gauge part and follow actual tester and to sample the angular difference value drawn;
The data value of the no-load voltage ratio that described current transformer nameplate region display teacher is arranged, load, grade.
Be illustrated in figure 2 the theory diagram of slave computer: slave computer is connected by RS232 serial ports with controller, standard current transformer simulator, tested current transformer simulator, mutual-inductor tester simulator, current loading case simulator are all connected with controller.
Below each simulator is described in detail respectively.
1. standard current transformer simulator
As shown in Figure 3, standard current transformer simulator comprises housing, is positioned at the current transformer of housing, is positioned at the some simulation connection terminals outside housing.
Describe in detail respectively below.
1. current transformer
As shown in Figure 3, the current transformer being positioned at housing described in is made up of winding, Secondary Winding, iron core and framework, a connection terminal etc. of mutually insulated.Its principle of work and transformer are substantially identical, and the number of turn (N1) of a winding is less, is directly series in power circuit, a load current (I
1) by a winding time, the alternating flux induction of generation produces the secondary current (I that reduces in proportion
2); The number of turn (the N of Secondary Winding
2) more, connect with the secondary load (Z) of the current coils such as instrument, relay, transmitter and form closed-loop path, due to one time, winding has equal ampere-turn with Secondary Winding, I
1n
1=I
2n
2, in current transformer rated transformation ratio current transformer actual motion, load impedance is very little, and Secondary Winding, close to short-circuit condition, is equivalent to the transformer of a short circuit operation.
Described mutual inductor can use straight-through current transformer, and itself structure does not establish a winding, and current-carrying (load current) wire is by L
1to L
2a winding effect is played through being rolled circle (or other shapes) iron core rolled into by siliconized plate.Be wrapped on circular iron core Secondary Winding Direct Uniform, connect with the secondary load of the current coils such as instrument, relay, transmitter and form closed-loop path, because a winding do not established by straight-through current transformer, its no-load voltage ratio is determined through the number of turn in mutual inductor iron core according to a winding, the punching number of turn is more, and no-load voltage ratio is less; Otherwise the punching number of turn is fewer, and no-load voltage ratio is larger.
By this Current Transformer Secondary current/voltage of sampling, thus calculate the positive and negative of the polarity of the primary line that it passes.
The primary line input terminal of current transformer is L1, L2, and secondary line input terminal is K1, K2.Extraneous power supply accesses to secondary line input terminal K1, K2 of current transformer after isolating transformer.
2. simulation connection terminal
Simulation connection part is arranged on housing appearance, and its circumferential attachment portion is made up of computing machine, controller, isolation change.As shown in Figure 3: simulator primary line input terminal is masked as L1, L2, L3; Secondary line input terminal is masked as K1, K2, K3, and described six simulation terminals are directly connected with the mainboard of controller.As required, this six roots of sensation wiring of controller identifiable design L1, L2, L3, K1, K2, K3 be interconnected state.The head end of 6 wiring is respectively: 1a, 2a ... .5a, 6a.The tail end of 6 wiring is respectively: 1b, 2b ... 5b, 6b.Namely, slave computer by controller to identify timely and accurately each end number with other 5 to hold number relation (being turned on or off).Know method for distinguishing and adopt scan-type.
It should be noted that, it is 100/5A, 1000/5A that standard current transformer simulator can realize simulation no-load voltage ratio value.
2. tested current transformer simulator
As shown in Figure 4, tested current transformer Simulator design principle is the same with standard current transformer simulator, and just input terminal has some difference, and primary line input terminal is masked as L1, L2; Secondary line input terminal is masked as K1, K2.
3. current loading case simulator
As shown in Figure 5, current loading case simulator comprise housing, the some simulation connection terminals be positioned at outside housing.
Simulation connection terminal is arranged on housing appearance, and when power factor is 0.8, fictitious load regulation stall 2.5VA, 3.75VA, 5VA, 10VA, 15VA, 20VA respectively, described 6 input terminals are directly connected with the mainboard of controller.As required, these five wiring of controller identifiable design be interconnected state.The head end of 6 wiring is respectively: 1a, 2a ... .5a, 6a.The tail end of 6 wiring is respectively: 1b, 2b ... 5b, 6b.Namely, slave computer by controller to identify timely and accurately each end number with other 5 to hold number relation (being turned on or off).Know the scan-type algorithm that method for distinguishing adopts controller MCU integrated.
Described current loading case simulator makes wiring voltage become very low (generally only having about 10V), can simulate overload capacity 120%, rated current: 5A, power factor are 0.8, and simulator has communication import, by computer installation load gear.
Reality simulation current loading case outward appearance, current loading case simulator outward appearance and real current load box outward appearance completely the same, the binding post wherein on current loading case simulator panel is also the same with real current load box.Reach the effect consistent with on-the-spot test environment.
4. current lifting device simulator
As shown in Figure 6, current lifting device simulator comprise housing, the some simulation connection terminals be positioned at outside housing.
Simulation connection terminal has 5, two input terminals be masked as 220V, ±; Three lead-out terminals are masked as 0,5V/100A, 5V/100A, and described 5 input terminals are directly connected with the mainboard of controller.As required, these 5 wiring of controller identifiable design be interconnected state.The head end of 5 wiring is respectively: 1a, 2a ... .5a.The tail end of 5 wiring is respectively: 1b, 2b ... 5b.Namely, slave computer by controller to identify timely and accurately each end number with other 4 to hold number relation (being turned on or off).Know method for distinguishing and adopt scan-type.
Described current lifting device simulator under the condition of equipment appearance, function complete simulation, make wiring voltage become very low (generally only having about 10V), can be implemented in safe operating voltage under for student's current lifting device training examination reliable safety guarantee is provided.System also can realize simulation current lifting device punching function.The simulation big current of current lifting device simulator has 0 ~ 2000A, 1000A and above punching one circle, exports the every circle of 2V/.
5. mutual-inductor tester simulator
As shown in Figure 7, described mutual-inductor tester simulator comprises housing, is positioned at the circuit board of housing, is positioned at the some simulation connection terminals outside housing.
A. circuit board
Existing mutual-inductor tester simulator circuit board can be used.When operating voltage (or electric current) loop of mutual-inductor tester simulator applies trial voltage (or electric current), when differential pressure (or difference stream) loop applies error voltage (or electric current), mutual-inductor tester simulator can obtain differential pressure (or difference stream) phasor relative to the in-phase component of operating voltage (or electric current) phasor and quadrature component by electric-bridge circuit, electronic circuit or number peace circuit measuring, can obtain by the Amplitude Ration (ratio difference) of voltage (or electric current) phasor that compares and operating voltage (or electric current) phasor and phase differential by calculating.If by voltage (or electric current) phasor advanced operating voltage (or electric current) phasor compared, phase differential is just, delayed is negative.The in-phase component of its phasor of mutual-inductor tester simulator and quadrature component, load value come from the value that slave computer is arranged.Percentage tabular value comes from the size of pressure regulator adjustment by mutual-inductor tester simulator value.
B. simulation connection part
Simulation connection part is arranged on housing appearance.As shown in Figure 7: operating voltage loop input is masked as a, X; Working current loop input terminal is masked as To, Tx, and differential pressure input terminal is K, D; The head end of 6 wiring is respectively: 1a, 2a ... .5a, 6a, tail end is respectively: 1b, 2b ... 5b, 6b.As required, computing machine is interconnected state by the wiring of controller identifiable design a, X, To, Tx, K, D six roots of sensation.Namely computing machine to identify timely and accurately each end number with other 5 to hold number relation (being turned on or off).Controller adopts scan-type, and pair of wire connection terminals scans one by one.Namely, first from 1a, 6a is recognized one by one.According to communication protocol, result is constantly uploaded to computing machine by RS232 interface by controller, and the wiring point test connections such as its To, Tx, D, K, a, X show on computers to wrong information.
Mutual-inductor tester simulator is the important composition equipment of student's machine, there are the outward appearance of entity mutual-inductor tester, binding post, panel etc., be as good as with actual mutual-inductor tester from sense organ, can realize that electric current, current transformer incorrect polarity, wiring error, no-load voltage ratio mistake, error are overproof, the intelligent instrument of the analogue simulation such as overproof that is deteriorated.Be made up of Aluminum Alloy Chassis, circuit board, power supply, communication serial port and binding post.Its circumferential attachment portion is made up of computing machine, controller, pressure regulator, isolation change.220V external power source is after pressure regulator pressure regulation, then through isolating transformer, mutual-inductor tester simulator interior power supply circuit input voltage becomes 30V.
Described mutual-inductor tester simulator is not adopt ratio method to carry out true error verification, but adopt entirely virtual mode on slave computer, carry out the error checking of mutual inductor, the simulation test functions such as the selection of range, according to the computing machine that the communication protocol of agreement is connected by RS-232 serial communication interface, the in-phase component of its phasor and quadrature component, load value derives from the value that host computer is arranged, percentage tabular value derives from the value by mutual-inductor tester simulator after adjustment pressure regulator, its ratio, angular difference, error indicating value derives from the data of assignment in advance in host computer.If more than 5% of rated operational current or voltage, error is less than 180% during more than 30%, then mutual-inductor tester simulator warning no-load voltage ratio mistake; If more than 5% of rated operational current or voltage, when error is greater than 180%, then mutual-inductor tester simulator warning incorrect polarity, thus whole simulation error checking procedure keeps synchronous with arranging of slave computer, realize carrying out the training on operation of current transformer laboratory verification and examination under 30V low-voltage, reach the effect of training, examination student.
Described pressure regulator is connected by the power supply of isolating transformer with mutual-inductor tester simulator.
6. controller
Controller, under the management of embedded software, can realize all electronic, the wiring condition of quick criterion current transformer simulation connection terminal, and extends to the interconnected relationship of more multiple conducting wires, and constantly, in real time result is uploaded to slave computer.
A. the hardware implementing of controller
Figure 8 shows that controller theory diagram.Controller is made up of head terminals driver output module, tail terminals Gather and input module, polarity and signal discrimination module, RS232 transceiver module, MCU module and power supply unit module, MCU module is connected with signal discrimination module is unidirectional with head terminals driver output module, tail terminals Gather and input module, polarity, is bi-directionally connected with RS232 transceiver module.Below each module is introduced:
Head terminals driver output module: adopt 74HC374 or 8 latch integrated circuit.Receive the drive control signal that MCU module sends, apply low level to wiring the end of a thread to be judged.
Tail terminals Gather and input module: adopt 75HC244 or 83 state door integrated circuit.Achieve a butt joint line tail end signal scanning, inquires about the level state except waiting other wiring tail ends judged except wiring one by one.
Polarity and signal discrimination module: be made up of trsanscondutance amplifier and zero cross detection circuit.The effect of trsanscondutance amplifier is that signal is fully amplified, and to ensure the sensitivity detected, the effect of zero cross detection circuit is that sinusoidal wave simulating signal is become digital signal, is convenient to MCU process.After MCU obtains these signals, according to certain algorithm, then can judge polarity just with instead.
RS232 transceiver module: adopt SP3232 transceiver or similar integration module, by the communication interface of RS232 standard by the continuous real-time Transmission of data that gathers to slave computer or by the steering order information transmission of slave computer to corresponding simulator.
MCU module: the MPC82G516A singlechip chip adopting PQFP44 encapsulation.The scanning sequence that loads according to single-chip microcomputer of MCU module is by the logic level signal of continuous scanning collection terminals tail Gather and input module, judge the break-make relation of each lead wiring terminal, MCU module is also responsible for controlling terminal stud driver output module and is specifically driven which root terminal stud simultaneously.MPC82G516A is the one-chip microcomputer of the efficient 1-T structure based on 80C51, and every bar instruction needs 1 ~ 7 clock signal (faster than standard 8,051 6 ~ 7 times), compatible with 8051 instruction set.Therefore when having a same processing power with standard 8051, MPC82G516A only needs low-down travelling speed, can reduce power consumption significantly thus simultaneously.
Power supply unit module: other working powers needed for each module are provided.
B. the software simulating of controller
Fig. 9 is the software principle block diagram of this controller.Mainly be divided into 3 steps: program timing scanning is uploaded in real time with initialization, wiring state Real-time Collection, data.
The timing cycle that described program timing Scan Architecture and initialization step mainly realize program scans, and is convenient to realize multiple task management with accurate synchronous, this ensure that the reliability of data acquisition, communication.
Wiring state Real-time Collection step mainly realizes scan-type and drives terminal stud, gathers the whole Real-time Collection process of all conducting of terminals tail.
Real time data uploading step is by application layer communications protocol, the wiring situation that wiring state Real-time Collection functional module collects is converted to the data of the next function identification, and sends to slave computer.
C. controller wiring determination methods
Concrete grammar and the step of controller wiring judgement are as follows:
Step 1: after program scanning structure initialization, MCU module sends drive control signal, produce by head terminals driver module the end of a thread end that logic low drives a certain wire, give the end of a thread end feedback identified with low level, and other the end of a thread ends are all presented with high level;
Step 2:MCU module adopts the mode of program scanning, scan period is less than 100ms, by tail terminals Gather and input module, inquire about the level state of other wire tail ends one by one, if the level that the terminal tails that tail terminals Gather and input module is corresponding measures is low level, illustrate that this point is communicated with the end of a thread, if the level measured is high level, illustrate that this point and the end of a thread disconnect, tail terminals Gather and input module terminals tail level state is all gathered one time by MCU module, judges like this to be driven the break-make connection relationship of wire and other wires;
Step 3: circulate by this process, head terminals driver module scan-type carry out the wiring head end driving all the other analog conducting wires fast, after the head end of whole line is completed by driving one by one, MCU module just can collect the break-make situation of all conducting in real time, obtains the annexation between all conducting;
By RS232 transceiver module, the result of wire break-make annexation is uploaded to slave computer according to communication protocol after step 4:MCU module completes the collection of the break-make situation of all conducting, slave computer compares with the actual connection relationship that RS232 transceiver module is sent here according to the break-make relation of standard again, carries out the judgement of wiring relation to mistake.So far, whole wiring deterministic process result.Sending whole cycle of completing of data from collecting, being not more than 100ms, the annexation that Real-time Collection all conducting is mutual.
Below the method for work of native system is described in detail.Comprise the following step:
Step 1: host computer loading current transducer check wiring diagram interface, utilizes projector, impart knowledge to students to student;
Step 2: host computer loads training and arranges current transformer interface, creates host computer multithreading Thread, data buffer maxPacket, NetworkStream stream, for long-range transmission data are prepared; The success of current transformer interface being set as loaded training, carrying out subsequent step, otherwise returning host computer homepage;
Step 3: teacher is arranged at the supplemental characteristic of current mutual-inductor parameter setting area to the current transformer of each student's machine of host computer, described parameter comprises no-load voltage ratio, polarity, load (underloading), grade, error amount;
Step 4: open first serial serialPort1 when slave computer loads training current transformer interface and be connected with actual tester, if success, then carry out subsequent step, otherwise return slave computer homepage;
Step 5: first serial serialPort1 entrusts monitoring, the data of the actual tester of real-time sense;
Step 6: slave computer is opened second serial serialPort2 and is connected with controller, if open failure just return slave computer homepage immediately, if open successfully, carries out the following step;
Step 7: slave computer creates multithreading Thread, data buffer maxPacket, NetworkStream stream, for long-range reception data are prepared, creates second serial serialPort2 and entrusts monitoring, the data that real-time sense controller sends;
Step 8: the supplemental characteristic of no-load voltage ratio, polarity, load (underloading), grade, error amount is sent to each student's machine by NetworkStream stream by host computer, the data buffer maxPacket created puts into buffer zone data, and the host computer multithreading Thread of establishment monitors data.
It should be noted that, if teacher finds that data arrange mistake or have student not log in, can cancel button be clicked, cancel this secondary data and send.
Step 9: slave computer carries out receiving to supplemental characteristic with its multithreading Thread created and display parameter the supplemental characteristic of display no-load voltage ratio wherein, load, grade, when teacher's machine sends data again, this multithreading Thread can monitor in real time and again receive data.
Step 10: the data monitored controller and send are monitored in the trust that slave computer training arranges region, the viewing area second serial serialPort2 at current transformer interface, data are received with int [] number2=newint [48] when data are different, and with the Split(of string) method decomposition data, by every single line that the intelligentized real-time display student in time of mode energy analyzing data line connects, and can judge mistake, represent with black line when wiring is correct, represent with red line during wiring error.
Step 11: after slave computer training arranges all wiring successes of the viewing area at current transformer interface, slave computer enables multithreading Thread, sends with NetworkStream stream the data such as no-load voltage ratio, polarity obtained from host computer.
Step: 12: student verifies current transformer, manual adjustments pressure regulator, the data that actual tester sends according to student's machine carry out processes and displays, and send the detailed data of dial gauge every bit to student's machine.
Step 13: the trust that slave computer enables first serial serialPort1 is monitored, when listening to actual tester buffer zone and having data, slave computer array byte [] b receives data, then carry out the various ways verification modes such as odd even, packet header 0x55, bag size to verify, verify unsuccessfully direct discard, verification succeeds array int [] number=newint [48] storage data, reaches and receives data object.
Step: 14: decomposition data, obtains dial gauge, ratio, angular difference data, reaches the actual tester data object of display.
Beneficial effect of the present invention is:
The present invention adopts Computer real time simulation, the work on the spot environment of analog current mutual inductor simulation calibrating to greatest extent, provide at the standard current transformer simulator of equipment appearance, function complete simulation material object, tested current transformer simulator, current lifting device simulator, mutual-inductor tester simulator, current loading case simulator, the operating voltage of whole system and electric current be far smaller than true environment voltage and current, can be implemented under safe operating voltage, electric current as the training of student's current transformer metering provides reliable safety guarantee.
Controller of the present invention meets the technical requirement of standard current transformer calibrating wiring simulation system or other similar simulation training systems completely, all electronic can be realized, judge the on off operating mode of simulation connection in real time, exactly, and in time, constantly by result data be uploaded to slave computer do wiring to the process further such as misinterpretation.
Slave computer can carry out test connection judgement to the simulation connection connection terminal of each simulator, and actual tests wiring condition can be shown on computers, excite student to the comprehension of work on the spot and actual operational capacity to greatest extent, rapid raising student operative skill, has stronger production practical significance.
Claims (6)
1. a method of work for Simulation of current transformer training system, is characterized in that, described Simulation of current transformer training system, comprises teacher's machine, some student's machines communicated to connect with teacher's machine, wherein,
Teacher's machine comprises host computer, the projector equipment be connected with host computer, current transformer detect entity platform; Described host computer is for controlling the communication of whole system, and the slave computer parameter realizing student's machine issues, current transformer training function; Described current transformer detects entity platform and comprises actual current lifting device, actual standard current transformer, actual tested current transformer, actual current Burden box, actual tester, actual pressure regulator;
Controller, pressure regulator, standard current transformer simulator, tested current transformer simulator, current lifting device simulator, mutual-inductor tester simulator, current loading case simulator that described student's machine comprises slave computer, communicates to connect with slave computer, each simulator described is all connected with controller, wherein
Described current loading case simulator comprises housing, the some simulation connection terminals be positioned at outside housing, for outward appearance and the function of current loading case that is virtually reality like reality;
Described standard current transformer simulator comprises housing, is positioned at the current transformer of housing, is positioned at the some simulation connection terminals outside housing, for outward appearance and the function of standard current transformer that is virtually reality like reality;
Described tested current transformer simulator comprises housing, is positioned at the current transformer of housing, is positioned at the some simulation connection terminals outside housing, for outward appearance and the function of tested current transformer that is virtually reality like reality;
Described current lifting device simulator comprises housing, the some simulation connection terminals be positioned at outside housing, for outward appearance and the function of current lifting device that is virtually reality like reality;
Described mutual-inductor tester simulator comprises housing, is positioned at the circuit board of housing, is positioned at the some simulation connection terminals outside housing, for outward appearance and the function of mutual-inductor tester that is virtually reality like reality;
Each simulator described all has some simulation connection terminals, and described simulation connection terminal is for simulating the connection terminal function of entity;
Pressure regulator is connected with mutual-inductor tester simulator power unit by isolating transformer;
Controller is used for the signals collecting of the simulation connection terminal connections situation of each simulator, and is uploaded to the slave computer of its correspondence, and performs the steering order of slave computer transmission;
Slave computer is used for the parameter set each simulator controller sending controling instruction information, reception controller information upload, reception host computer; and carry out signal disposal and analysis, actual tests wiring condition is arranged on current transformer interface in the training of slave computer and shows in real time;
Described host computer is provided with training and arranges current transformer interface, and the training of described host computer arranges current transformer interface and is divided into current mutual-inductor parameter setting area, current transformer nameplate viewing area, current transformer data area;
Described current mutual-inductor parameter setting area can arrange the supplemental characteristic of the current transformer of each student's machine, and described parameter comprises no-load voltage ratio, polarity, load, grade, error;
Described current transformer nameplate viewing area, for showing the setting value of parameters in real time;
Current transformer data area is fully loaded and underloading data according to the display in real time in time of the setting value of parameters;
Described host computer is also provided with current transformer verification wiring diagram interface;
Described slave computer is provided with training and arranges current transformer interface, and the training of described slave computer arranges current transformer interface and is divided into current transformer connection graph region, region, surveillance zone, current transformer nameplate region;
The not wired wiring diagram of described current transformer connection graph region display current transformer, and the connection layout after wiring, represent with black line when student's wiring is correct, represent during wiring error with red line;
Region, described surveillance zone is followed the sample percentage tabular value, the ratio part that draw of actual tester and is followed the sample ratio difference, the angular difference part that draw of actual tester for showing dial gauge part and follow actual tester and to sample the angular difference value drawn;
The data value of the no-load voltage ratio that described current transformer nameplate region display teacher is arranged, load, grade;
The method of work of described Simulation of current transformer training system comprises the following step:
Step 1: host computer loading current transducer check wiring diagram interface, utilizes projector, impart knowledge to students to student;
Step 2: host computer loads training and arranges current transformer interface, creates host computer multithreading Thread, data buffer maxPacket, NetworkStream stream, for long-range transmission data are prepared; The success of current transformer interface being set as loaded training, carrying out subsequent step, otherwise returning host computer homepage;
Step 3: teacher is arranged at the supplemental characteristic of current mutual-inductor parameter setting area to the current transformer of each student's machine of host computer;
Step 4: open first serial when slave computer loads training current transformer interface and be connected with actual tester, if success, then carry out subsequent step, otherwise return slave computer homepage;
Step 5: first serial is entrusted and monitored, the data of the actual tester of real-time sense;
Step 6: slave computer is opened second serial and is connected with controller, if open failure just return slave computer homepage immediately, if open successfully, carries out the following step;
Step 7: slave computer creates multithreading Thread, data buffer maxPacket, NetworkStream stream, for long-range reception data are prepared, creates second serial and entrusts monitoring, the data that real-time sense controller sends;
Step 8: supplemental characteristic is sent to each student's machine by NetworkStream stream by host computer, the host computer multithreading Thread of establishment monitors data;
Step 9: the multithreading Thread that slave computer slave computer creates carries out reception and display parameter data to supplemental characteristic, and when teacher's machine sends data again, this multithreading Thread can monitor in real time and again receive data;
Step 10: the data monitored controller and send are monitored in the trust that slave computer training arranges region, the viewing area second serial at current transformer interface, data are received with int [] number2=newint [48] when data are different, and with the Split(of string) method decomposition data, by analyzing data, show by the mode of line every single line that each simulator connects in real time;
Step 11: after slave computer training arranges all wiring successes of the viewing area at current transformer interface, slave computer enables multithreading Thread, sends with NetworkStream stream the supplemental characteristic obtained from host computer;
Step: 12: student verifies current transformer, manual adjustments pressure regulator, the data that actual tester sends according to student's machine carry out processes and displays, and send the detailed data of dial gauge every bit to student's machine;
Step 13: the trust that slave computer enables first serial is monitored, when listening to actual tester buffer zone and having data, slave computer receives data, verifies, and verify unsuccessfully directly discard, verification succeeds is storage data then, reaches and receives data object;
Step: 14: decomposition data, obtains dial gauge, ratio, angular difference data, reaches the actual tester data object of display.
2. the method for work of Simulation of current transformer training system as claimed in claim 1, it is characterized in that, in step 13, slave computer takes the verification mode of odd even, packet header 0x55, bag size to the data received, and verification succeeds array int [] number=newint [48] stores data.
3. the method for work of Simulation of current transformer training system as claimed in claim 1, is characterized in that, in step 9, and the data of described slave computer display no-load voltage ratio, load, grade three parameters.
4. the method for work of Simulation of current transformer training system as claimed in claim 1, it is characterized in that, in step 3, after all supplemental characteristics all set, data after the current transformer data area display setting at the loading training current transformer interface of host computer, otherwise do not show.
5. the method for work of Simulation of current transformer training system as claimed in claim 1, it is characterized in that, when slave computer listens to data buffer maxPacket change, slave computer receives data again, store data, decomposition data, upgrade dial gauge, angular difference, than difference data, reach the dial gauge that upgrades in time in real time, angular difference, than difference data object.
6. the method for work of Simulation of current transformer training system as claimed in claim 1, it is characterized in that, in step 10, slave computer training arranges in the region, viewing area at current transformer interface, represent with black line when each simulator wiring is correct, represent with red line during wiring error.
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| CN104504976B (en) * | 2014-12-31 | 2015-08-12 | 贵州电力试验研究院 | Training method of transformer three-level simulation training system |
| CN105702139A (en) * | 2016-04-21 | 2016-06-22 | 国网江苏省电力公司职业技能训练基地 | System for displaying body feeling of line overloading |
| US10426424B2 (en) | 2017-11-21 | 2019-10-01 | General Electric Company | System and method for generating and performing imaging protocol simulations |
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