CN103777167A - Voltage transformer simulation examination system and working method - Google Patents
Voltage transformer simulation examination system and working method Download PDFInfo
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- CN103777167A CN103777167A CN201410009679.0A CN201410009679A CN103777167A CN 103777167 A CN103777167 A CN 103777167A CN 201410009679 A CN201410009679 A CN 201410009679A CN 103777167 A CN103777167 A CN 103777167A
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Abstract
The invention provides a voltage transformer simulation examination system and a working method. The system comprises a teacher machine and student machines connected in a communication mode with the teacher machine. Each student machine includes a lower computer and a voltage transformer detection simulation platform, wherein the voltage transformer detection simulation platform includes a control machine, and simulators connected with the control machine and used for test of voltage transformers. The teacher machine of the system carries out voltage transformer examination on students after setting voltage transformer parameters of the student machines. The working voltage and current of the system are far smaller than the voltage and current of a real environment, and reliable security guarantee can be provided for students in voltage transformer test examination under safe working voltage and current.
Description
Technical field
The present invention relates to electric energy mutual-inductor field, relate in particular to a kind of voltage transformer (VT) emulation examination 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 who grasps mutual inductor field detecting technology is less, affect normal testing, mainly because examination device lags behind, be with first-class examination mode mainly with concentration theory examination, lecture experiment, written exam and with on-the-spot one at present, all have significant limitation, examination efficiency is very low.
And examination in actual environment, because electric energy measuring equipment has high voltage, large electric current, can produce potential safety hazard to the person and equipment, limit quality and the efficiency of taking an examination.
Can under the condition of low pressure, little electric current, operate if can provide a kind of, and function and complete voltage transformer (VT) that is virtually reality like reality test examination system in appearance, so, safe operation when electric energy metering verification personnel are taken an examination to this equipment will be very favourable.
Summary of the invention
For addressing the above problem, the invention provides a kind of voltage transformer (VT) emulation examination system, the student's machine that comprises teacher's machine, the communication connection of some and teacher's machine, wherein,
Projector equipment, voltage transformer (VT) detection entity platform that teacher's machine comprises host computer, is connected with host computer; Described host computer is for controlling the communication of whole system, and the slave computer parameter that realizes student's machine issues, voltage transformer (VT) training function; Described voltage transformer (VT) detects entity platform and comprises actual stepup transformer, actual standard voltage transformer (VT), actual tested voltage transformer (VT), virtual voltage Burden box, actual tester, actual pressure regulator;
Described student's machine comprises slave computer, controller, pressure regulator, standard potential transformer simulator, tested voltage transformer (VT) simulator, stepup transformer simulator, mutual-inductor tester simulator, voltage load box simulator with slave computer communication connection, described each simulator is all connected with controller, wherein
Described voltage load box simulator is for voltage load box simulator that is virtually reality like reality;
Described standard potential transformer simulator is for standard potential transformer simulator function that is virtually reality like reality;
Described tested voltage transformer (VT) simulator is for the function of tested voltage transformer (VT) that is virtually reality like reality;
Described stepup transformer simulator is for the function of stepup transformer that is virtually reality like reality;
Described mutual-inductor tester simulator is for the function of mutual-inductor tester that is virtually reality like reality;
Described each simulator 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 its corresponding slave computer, and carries out the steering order that slave computer sends;
Slave computer is for uploading information, receive the parameter that host computer is set each simulator controller sending controling instruction information, reception controller, and carry out signal disposal and analysis, actual tests wiring situation in the time that arranging on voltage transformer (VT) interface, is shown in the examination of slave computer.
Further, 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 a terminals driver output module, tail terminals Gather and input module, polarity, is connected with RS232 transceiver module is two-way.Wherein,
Terminals driver output module, for receiving the drive control signal that MCU module is sent, applies low level to wiring the end of a thread to be judged;
The tail terminals Gather and input module line tail end signal scanning that is used for achieving a butt joint, inquiry judge the wiring level state of other wiring tail ends unexpectedly except band one by one;
Polarity and signal discrimination module are used for realizing the amplification of signal, and realize the analog to digital conversion of signal;
RS232 transceiver module for the signal of tail terminals Gather and input module is transferred to host computer or by the steering order communication of host computer to corresponding simulator;
MCU module is used for control head terminals driver output module drive terminal stud to be judged, 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 to other each module for power supply.
Further, described host computer is provided with examination voltage transformer (VT) interface is set, and described examination arranges voltage transformer (VT) interface and is divided into voltage transformer (VT) parameter setting area, voltage transformer (VT) nameplate viewing area, voltage transformer (VT) data area;
Described voltage transformer (VT) parameter display region can arrange the supplemental characteristic of the voltage transformer (VT) of each student's machine, and described parameter comprises no-load voltage ratio, polarity, load, grade, error;
Described voltage transformer (VT) nameplate viewing area, for showing in real time the setting value of parameters;
Voltage transformer (VT) data area shows fully loaded and underloading data in time in real time according to the setting value of parameters;
Described slave computer is provided with examination voltage transformer (VT) interface is set, and described interface is divided into Examination Rule viewing area, monitors area, voltage transformer (VT) nameplate region;
Described Examination Rule viewing area shows the Examination Rule that teacher's machine arranges and pass down;
Described supervision area 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 and follow the actual tester angular difference value drawing of sampling for showing dial gauge part;
Described voltage transformer (VT) nameplate viewing area shows no-load voltage ratio, the load that teacher arranges, the data value of grade.
Further, described student's machine has six.
The method of work of above-mentioned voltage transformer (VT) emulation examination system, comprises the following step:
Step 1: upper airborne Examination Rule viewing area, read the slave computer of all logins simultaneously, for each student's machine creates one, voltage transformer (VT) bound of parameter face and thread Thread, data buffer, NetworkStream stream can be set;
Step 2: as loaded Examination Rule viewing area success, the supplemental characteristic of teacher's voltage transformer (VT) to each slave computer in the voltage transformer (VT) parameter setting area of host computer arranges modification, otherwise returns to host computer homepage;
Step 3: slave computer loads examination voltage transformer (VT) interface, opens first serial simultaneously and is connected with actual tester, if success is carried out subsequent step, otherwise returned to slave computer homepage;
Step 4: first serial is entrusted and monitored, the data of the actual tester of real-time sense;
Step 5: slave computer is opened second serial and is connected with controller, if open just slave computer homepage immediately of failure, if opened successfully, carries out the following step;
Step 6: slave computer creates multithreading Thread, data buffer, NetworkStream stream, for long-range reception data are prepared, creates second serial and entrusts monitoring, the data that real-time sense controller sends;
Step 7: host computer transmits Examination Rule to the slave computer of each login, and send the supplemental characteristic of no-load voltage ratio, polarity, load (underloading), grade, error amount to the slave computer that sets supplemental characteristic;
Step 8: slave computer receives and shows no-load voltage ratio, load, three supplemental characteristics of grade supplemental characteristic with the multithreading Thread of its establishment, and in the time that host computer sends data again, this multithreading Thread can monitor and again receive data in real time; Meanwhile, slave computer receives and shows with the Examination Rule that multithreading Thread sends host computer, and in the time that host computer sends data again, multithreading Thread can monitor and again receive Examination Rule in real time;
Step 9: the data that monitoring controller sends are monitored with the trust of second serial in the region, viewing area of slave computer Examination Rule viewing area, int[in the time that data are different] number2=new int[48] reception data, and with the Split(of string) method decomposition data, can intelligentizedly show in real time in time every single line that student connects by the mode of analyzing data line, and can judge mistake;
Step 10: when the program of slave computer judges after all wiring successes, enable Thread, flow and send the no-load voltage ratio, polarity, the data that obtain from host computer by array to actual tester with NetworkStream, as long as the wiring error of existence, can not send data to tester, tester, all the time in zero condition, data not show;
Step 11: actual tester receives after data, student could carry out verification to voltage transformer (VT) and occur data, manual adjustments pressure regulator, the data that actual tester sends according to slave computer are carried out processes and displays, and send the detailed data of dial gauge every bit to slave computer;
Step 12: slave computer is enabled the trust of first serial and monitored, and in the time listening to actual tester buffer zone and have data, slave computer receives data by array, then carry out verification, data are directly abandoned in verification failure, and verification succeeds array storage data reaches and receives data object;
Step: 13: decomposition data, obtain dial gauge, ratio, angular difference data, reach and show actual tester data object.
Further, in step 12, slave computer is taked odd even to the data that receive, and packet header 0x55, wraps big or small verification mode, verification succeeds array int[] number=new int[48] storage data.
Further, in step 1, the no-load voltage ratio on each slave computer interface, polarity, load, grade, these five of error amounts all obtain at random with Random.
Further, in step 7, teacher's machine is all modified five supplemental characteristics after setting, the corresponding slave computer that host computer could send.
Further, in the time that slave computer listens to data buffer maxPacket and changes, slave computer receives data again, storage data, and decomposition data, upgrades dial gauge, angular difference, than difference data, reaches the dial gauge that upgrades in time in real time, angular difference, than difference data object.
Further, in the region, viewing area of slave computer Examination Rule viewing area, when each simulator wiring is correct, represent with black line, when wiring error, represent 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 voltage mutual inductor simulation calibrating to greatest extent, provide at the standard potential transformer simulator of equipment appearance, function complete simulation material object, tested voltage transformer (VT) simulator, mutual-inductor tester simulator, stepup transformer simulator, voltage load box simulator, the operating voltage of whole system and electric current be far smaller than true environment voltage and current, can realize under trouble free service voltage, electric current and to provide reliable safety guarantee for the examination of student's voltage transformer (VT) test.
Controller of the present invention meets the technical requirement of standard potential transformer calibrating wiring simulation system or other similar emulation examination systems completely, can realize all electronic, judge in real time, exactly the on off operating mode of simulation connection, and in time, constantly result data is uploaded to slave computer and does wiring misinterpretation etc. is further processed.
Slave computer can carry out test connection judgement to the simulation connection connection terminal of each simulator, and actual tests wiring situation can be shown on computers, excite to greatest extent comprehension and the actual operational capacity of student to work on the spot, improve rapidly student's operative skill, there is stronger production practical significance.
accompanying drawing explanation:
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 potential transformer simulator.
Fig. 4 is the theory diagram of tested voltage transformer (VT) simulator.
Fig. 5 is the theory diagram of voltage load box simulator.
Fig. 6 is the theory diagram of stepup transformer simulator.
Fig. 7 is the theory diagram of mutual-inductor tester simulator.
Fig. 8 is controller principle module map.
Fig. 9 is the software principle block diagram of controller.
embodiment:
As shown in Figure 1, system global structure of the present invention is by 1 cover teacher machine, 6 cover student machines, too net network communication equipment forms, 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), preferred, can also comprise that voltage transformer (VT) detects the equipment such as entity platform.The communication of PC control whole system, realizes the functions such as student's machine parameter issues, the teaching of mutual inductor rudimentary knowledge, also can detect entity platform in conjunction with voltage transformer (VT) and carry out the transformer error verification of entity.Therefore, teacher's machine is the Control on Communication main frame of whole system, and the while is as the actual detection platform of laboratory verification mutual inductor.Described voltage transformer (VT) detects entity platform and comprises actual current lifting device, actual standard voltage transformer (VT), actual tested voltage transformer (VT), actual current Burden box, actual tester, actual pressure regulator
Described host computer is provided with examination voltage transformer (VT) interface is set, and described examination arranges voltage transformer (VT) interface and is divided into voltage transformer (VT) parameter setting area, voltage transformer (VT) nameplate viewing area, voltage transformer (VT) data area;
Described voltage transformer (VT) parameter display region can arrange the supplemental characteristic of the voltage transformer (VT) of each student's machine, and described parameter comprises no-load voltage ratio, polarity, load, grade, error;
Described voltage transformer (VT) nameplate viewing area, for showing in real time the setting value of parameters;
Voltage transformer (VT) data area shows fully loaded and underloading data in time in real time according to the setting value of parameters.
(2) ethernet network device
Described ethernet network device is realized the slave computer of each student's machine and communicating by letter of teacher's machine.Host computer and a network system of 6 slave computer compositions, host computer can be had access to the demonstration operating mode of slave computer in real time, under " examination " state, host computer and special the giving lessons of projector equipment composition teacher are commented on system, can carry out giving lessons and taking an examination of mutual inductor and calibrating knowledge.
(3) student's machine
Described student's machine comprises a computing machine (slave computer) and voltage transformer (VT) detection simulation platform, and described voltage transformer (VT) detection simulation platform comprises controller, pressure regulator, standard potential transformer simulator, tested voltage transformer (VT) simulator, mutual-inductor tester simulator, voltage load box simulator, stepup transformer simulator.
Described slave computer is provided with examination voltage transformer (VT) interface is set, and described interface is divided into Examination Rule viewing area, monitors area, voltage transformer (VT) nameplate region;
Described Examination Rule viewing area shows the Examination Rule that teacher's machine arranges and pass down;
Described supervision area 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 and follow the actual tester angular difference value drawing of sampling for showing dial gauge part;
Described voltage transformer (VT) nameplate viewing area shows no-load voltage ratio, the load that teacher arranges, the data value of grade.
Be illustrated in figure 2 the theory diagram of slave computer: slave computer is connected by RS232 serial ports with controller, standard potential transformer simulator, tested voltage transformer (VT) simulator, mutual-inductor tester simulator, voltage load box simulator are all connected with controller.
Below each simulator is described in detail respectively.
1. standard potential transformer simulator
As shown in Figure 3, standard potential transformer simulator comprises housing, is positioned at the voltage transformer (VT) of housing, is positioned at the some simulation connection terminals outside housing.
Describe in detail respectively below.
A. voltage transformer (VT)
The described voltage transformer (VT) that is positioned at housing is made up of winding, Secondary Winding, iron core and an insulation of mutually insulated.Its principle of work is substantially identical with transformer, when apply a voltage U 1 on a winding time, just produces a magnetic flux φ in iron core, according to the law of electromagnetic induction, in Secondary Winding, just produces a secondary voltage U2.Change once or the number of turn of Secondary Winding, can produce different primary voltages and secondary voltage ratio, this just can form not voltage transformer (VT) on year-on-year basis.Voltage transformer (VT) converts high voltage to low-voltage, i.e. 100V in proportion.
B. simulation connection terminal
Simulation connection part is arranged on housing appearance.As shown in Figure 3: simulator primary line input terminal is masked as A, X ground; Secondary line input terminal is masked as 35KV/100V, 10KV/100V, x, and described five input terminals are directly connected with the mainboard of controller.As required, controller can be identified the state that interconnects of these five wiring.The head end of 5 wiring is respectively: 1a, and 2a ... .5a.The tail end of 5 wiring is respectively: 1b, 2b ... 5b.Namely, host computer by controller to identify timely and accurately each end number and other 4 ends number relation (conducting or disconnection).Know method for distinguishing and adopt the integrated scan-type algorithm of controller MCU.
It should be noted that, it is 35KV/100V, 10KV/100V that the present invention can realize simulation no-load voltage ratio value.0.05 grade of simulation grade, overload capacity 120%.
Host computer sets and becomes simulation no-load voltage ratio value, polarity, rated power factor, nominal load, rated frequency, accuracy grade.Under the condition of equipment appearance, function complete simulation, make wiring voltage become very low (generally only having 10V left and right).
2. tested voltage transformer (VT) simulator
As shown in Figure 4, tested voltage transformer (VT) Simulator design principle is the same with standard potential transformer simulator, and just input terminal has some difference, and primary line input terminal is masked as A, X; Secondary line input terminal is masked as 100V, x.
3. voltage load box simulator
As shown in Figure 5, voltage load box simulator comprises housing, is positioned at the some simulation connection terminals outside housing.
Simulation connection terminal is arranged on housing appearance, and power factor is 0.8 o'clock, fictitious load regulation stall 2.5VA, 5VA, 10VA, 20VA, 40VA respectively, and described 5 input terminals are directly connected with the mainboard of controller.As required, controller can be identified the state that interconnects of these five wiring.The head end of 5 wiring is respectively: 1a, and 2a ... .5a.The tail end of 6 wiring is respectively: 1b, 2b ... 5b.Namely, host computer by controller to identify timely and accurately each end number and other 4 ends number relation (conducting or disconnection).Know method for distinguishing and adopt the integrated scan-type algorithm of controller MCU.
Described voltage load box simulator makes wiring voltage become very low (generally only having 10V left and right), can simulate overload capacity 120%, rated voltage: 100V, power factor is 0.8, simulator has communication import, can be online by controller and host computer, can load gear be set by host computer.
Reality simulation voltage load box outward appearance, voltage load box simulator outward appearance and real voltage load box outward appearance are in full accord, and wherein the binding post on voltage load box simulator panel is also the same with real voltage load box.Reach the effect consistent with on-the-spot test environment.
4. stepup transformer simulator
As shown in Figure 6, stepup transformer simulator comprises housing, is positioned at the some simulation connection terminals outside housing.
Simulation connection terminal has 4, and two primary line input terminals are masked as 50KV, X ground; Secondary line input terminal be masked as 220V, ±, described 4 input terminals are directly connected with the mainboard of controller.As required, controller can be identified the state that interconnects of these 5 wiring.The head end of 5 wiring is respectively: 1a, and 2a ... .4a.The tail end of 5 wiring is respectively: 1b, 2b ... 4b.Namely, host computer by controller to identify timely and accurately each end number and other 3 ends number relation (conducting or disconnection).Know method for distinguishing and adopt scan-type.
Described stepup transformer simulator, under the condition of equipment appearance, function complete simulation, makes wiring voltage become very low (generally only have about 10V), can realize the training examination for student's stepup transformer under trouble free service voltage reliable safety guarantee is provided.Up voltage 0 ~ 50KV of simulation of stepup transformer simulator, simulation overload capacity 120%.
Reality simulation stepup transformer outward appearance, stepup transformer simulator outward appearance is in full accord with true stepup transformer outward appearance, and wherein the binding post on stepup transformer simulator panel is also the same with true stepup transformer.Reach the effect consistent with on-the-spot test environment.
Simulator has communication interface, can be online with host computer, can no-load voltage ratio and polarity, boost value be set by host computer.
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
Can use existing mutual-inductor tester simulator circuit board.When operating voltage (or electric current) loop of mutual-inductor tester simulator applies trial voltage (or electric current), when differential pressure (or poor stream) loop applies error voltage (or electric current), mutual-inductor tester simulator can obtain in-phase component and the quadrature component of differential pressure (or poor stream) phasor with respect to operating voltage (or electric current) phasor by electric-bridge circuit, electronic circuit or number peace circuit measuring, and voltage (or electric current) phasor that can obtain being compared by calculating and the amplitude of operating voltage (or electric current) phasor are than (ratio difference) and phase differential.If the leading operating voltage of the voltage being compared (or electric current) phasor (or electric current) phasor, phase differential, for just, lags behind as 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 arranges.Percentage tabular value comes from the size of pressure regulator adjusting 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 terminal 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, and 2a ... .5a, 6a, tail end is respectively: 1b, 2b ... 5b, 6b.As required, computing machine can be identified the state that interconnects of a, X, To, Tx, K, the wiring of the D six roots of sensation by controller.Be computing machine to identify timely and accurately each end number and other 5 ends number relation (conducting or disconnection).Controller adopts scan-type, and pair of wire connection terminals scans one by one.First from 1a, recognize one by one 6a.According to communication protocol, controller is constantly uploaded to computing machine by result by RS232 interface, 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 is outward appearance, binding post, panel of entity mutual-inductor tester etc., from sense organ, be as good as the intelligent instrument of the analogue simulation such as can realize electric current, TV transformer polarity mistake, wiring error, no-load voltage ratio mistake, error is overproof, variation is overproof with actual mutual-inductor tester.Formed by Aluminum Alloy Chassis, circuit board, power supply, communication serial port and binding post.Its peripheral coupling part is become and is formed by computing machine, controller, pressure regulator, isolation.220V external power source, after pressure regulator pressure regulation, then passes through isolating transformer, and mutual-inductor tester simulator interior power supply circuit input voltage becomes 30V.
Described mutual-inductor tester simulator is not to adopt ratio method to carry out true error verification, but adopt complete virtual mode on slave computer, to carry out the error checking of mutual inductor, the simulation test functions such as the selection of range, the computing machine connecting by RS-232 serial communication interface according to the communication protocol of agreement, the in-phase component of its phasor and quadrature component, load value derives from the value that host computer arranges, percentage tabular value derives from by the value of mutual-inductor tester simulator after adjusting pressure regulator, its ratio, angular difference, error indicating value derives from host computer the data of assignment in advance.If the more than 5% of rated operational current or voltage, error exceedes 30% and while being less than 180%, mutual-inductor tester simulator warning no-load voltage ratio mistake; If the more than 5% of rated operational current or voltage, when error is greater than 180%, mutual-inductor tester simulator warning incorrect polarity, thereby whole simulation error checking procedure keeps synchronizeing with arranging of slave computer, realize and under 30V low-voltage, carry out voltage transformer (VT) laboratory verification operating examination and examination, reach examination, examination student's effect.
Described pressure regulator is connected with the power supply of mutual-inductor tester simulator by isolating transformer.
6. controller
Controller, under the management of embedded software, can be realized all electronic, the fast wiring situation of criterion voltage transformer (VT) simulation connection terminal, and can expand to the more interconnected relationship of multiple conducting wires, and constantly, in real time result is uploaded to slave computer.
A. the hardware of controller is realized
Figure 8 shows that controller theory diagram.Controller is made up of 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 a terminals driver output module, tail terminals Gather and input module, polarity, is connected with RS232 transceiver module is two-way.Below each module is introduced:
Terminals driver output module: adopt 74HC374 or 8 latch integrated circuit.Receive the drive control signal that MCU module is sent, 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.The line tail end signal scanning that achieves a butt joint, inquiry judge the wiring level state of other wiring tail ends unexpectedly except band one by one.
Polarity and signal discrimination module: formed by trsanscondutance amplifier and zero cross detection circuit.The effect of trsanscondutance amplifier is that signal is fully amplified, and with the sensitivity that guarantees to detect, the effect of zero cross detection circuit is that sinusoidal wave simulating signal is become to digital signal, is convenient to MCU and processes.MCU obtains after these signals, according to certain algorithm, can judge polarity just with instead.
RS232 transceiver module: adopt SP3232 transceiver or similar integration module, the communication interface by RS232 standard by the continuous real-time Transmission of data gathering to slave computer or by the steering order communication of slave computer to corresponding simulator.
MCU module: the MPC82G 516A singlechip chip that adopts PQFP44 encapsulation.The scanning sequence that MCU module is loaded according to single-chip microcomputer 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.MPC82G516 A is the single-chip microprocessor of the efficient 1-T structure based on 80C51, and every instruction needs 1 ~ 7 clock signal (than fast 6 ~ 7 times of standard 8051), with 8051 instruction set compatibilities.Therefore in the case of having same processing power with standard 8051, MPC82G516A only needs low-down travelling speed, can reduce significantly thus power consumption simultaneously.
Power supply unit module: provide other each modules required working power.
B. the software of controller is realized
Fig. 9 is the software principle block diagram of this controller.Mainly be divided into 3 steps: program timing scanning and initialization, wiring state Real-time Collection, data are uploaded in real time.
Described program timing Scan Architecture and initialization step are mainly realized the timing cycle scanning of program, be convenient to realize multiple task management and synchronize accurately, have guaranteed like this reliability of data acquisition, communication.
Wiring state Real-time Collection step mainly realizes the whole Real-time Collection process that scan-type drives terminal stud, gathers all conducting of terminals tail.
It is by application layer communications protocol that real time data is uploaded step, and the wiring situation that wiring state Real-time Collection functional module is collected 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 is sent drive control signal, produce the end of a thread end of a certain wire of logic low driving by a terminals driver module, present with low level to the end of a thread end of identification, 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 one by one the level state of other wire tail ends, if the level measuring in terminal tails corresponding to tail terminals Gather and input module is low level, illustrate that this point is communicated with the end of a thread, if the level measuring is high level, illustrate that this point and the end of a thread disconnect, MCU module all gathers tail terminals Gather and input module terminals tail level state one time, judges like this break-make connection relationship that is driven wire and other wires;
Step 3: by this process circulation, the wiring head end that drives fast all the other analog conducting wires of terminals driver module scan-type, after the head end of whole lines 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;
Step 4:MCU module is uploaded to slave computer by RS232 transceiver module by the result of wire break-make annexation according to communication protocol after completing the collection of break-make situation of all conducting, the actual connection relationship comparison that slave computer is sent here according to the break-make relation of standard and RS232 transceiver module again, carries out wiring relation to wrong judgement.So far, whole wiring deterministic process result.Send whole cycle of completing of data from collecting, be not more than 100ms, Real-time Collection the mutual annexation of all conducting.
Below the method for work of native system is elaborated.Comprise the following step:
Step 1: upper airborne Examination Rule viewing area, read the slave computer of all logins simultaneously, for each student's machine creates one, voltage transformer (VT) bound of parameter face and thread Thread, data buffer maxPacket, NetworkStream stream can be set, and these five of no-load voltage ratio, polarity, load, grade, error amounts on each slave computer interface all obtains at random with Random.
It should be noted that, student can only have six at most.
Step 2: as loaded the success of Examination Rule viewing area, the supplemental characteristic of teacher's voltage transformer (VT) to each slave computer in the voltage transformer (VT) parameter setting area of host computer arranges modification, and described parameter comprises no-load voltage ratio, polarity, load (underloading), grade, error amount; As it is unsuccessful to load Examination Rule viewing area, return to host computer homepage.
Step 3: open first serial serialPort1 when slave computer loads examination voltage transformer (VT) interface and be connected with actual tester, if success is carried out subsequent step, otherwise returned to slave computer homepage;
Step 4: first serial serialPort1 entrusts monitoring, the data of the actual tester of real-time sense.
Step 5: slave computer is opened second serial serialPort2 and is connected with controller, if open just slave computer homepage immediately of failure, if opened successfully, carries out the following step.
Step 6: 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 7: host computer transmits Examination Rule to the slave computer of each login, and send the supplemental characteristic of no-load voltage ratio, polarity, load (underloading), grade, error amount to the slave computer that sets supplemental characteristic.
The transmission of supplemental characteristic creates NetworkStream and flows to each self-corresponding student's machine transmission data while using loading training that voltage transformer (VT) interface is set, the data buffer maxPacket creating separately puts into buffer zone data separately, and teacher's machine multithreading Thread of establishment monitors data.
It should be noted that, the transmission of Examination Rule is the student who sends each login, if teacher finds data, mistake is set, and can click cancel button, cancels this secondary data and sends.
Also it should be noted that, no-load voltage ratio, polarity, load, grade, error amount, as long as these five have one not arrange, just do not send data to corresponding slave computer, also there will not be data in voltage transformer (VT) data area, the content that the intelligentized demonstration of click that this CheckedChenged event that has wherein applied to radioButton can be followed mouse is in real time clicked.Meanwhile, the necessary typing Examination Rule of host computer, otherwise can not send data to slave computer.
Step 8: slave computer receives with the multithreading Thread of its establishment the supplemental characteristic that also shows no-load voltage ratio wherein, load, grade to supplemental characteristic, in the time that teacher's machine sends data again, this multithreading Thread can monitor and again receive data in real time; Meanwhile, slave computer receives and shows with the Examination Rule that multithreading Thread sends teacher's machine, and in the time that teacher's machine sends data again, multithreading Thread can monitor and again receive Examination Rule in real time.
Step 9: the data that monitoring controller sends are monitored with the trust of second serial serialPort2 in the region, viewing area of slave computer Examination Rule viewing area, int[in the time that data are different] number2=new int[48] reception data, and with the Split(of string) method decomposition data, can intelligentizedly show in real time in time by the mode of analyzing data line every single line that student connects, and can judge mistake, when wiring is correct, represent with black line, when wiring error, represent with red line.
Step 10: when the program of slave computer judges after all wiring successes, enable Thread, with NetworkStream fluxion group byte[] b1 sends the no-load voltage ratio, polarity, the data that obtain from host computer to actual tester, as long as have a line wrong, connect many single lines, connect few single line and can not send data to tester, tester, all the time in zero condition, data not show.
Step 11: actual tester receives after data, student could carry out verification to voltage transformer (VT) and occur data, manual adjustments pressure regulator, the data that tester sends according to student's machine are carried out processes and displays, and send the detailed data of dial gauge every bit to student's machine.
Step 12: slave computer is enabled the trust of first serial serialPort1 and monitored, in the time listening to actual tester buffer zone and have data, slave computer array byte[] b receives data, then carry out odd even, the various ways verification modes such as packet header 0x55, bag size are carried out verification, data, verification succeeds array int[are directly abandoned in verification failure] number=new int[48] storage data, reach and receive data object.
Step: 13: decomposition data, obtain dial gauge, ratio, angular difference data, reach and show actual tester data object.
In the time listening to buffer data and change, just again receive data, storage data, decomposition data, upgrades dial gauge, angular difference, than difference data, reaches the dial gauge that upgrades in time in real time, angular difference, than difference data object.
Beneficial effect of the present invention is:
The present invention adopts Computer real time simulation, the work on the spot environment of analog voltage mutual inductor simulation calibrating to greatest extent, provide at the standard potential transformer simulator of equipment appearance, function complete simulation material object, tested voltage transformer (VT) simulator, stepup transformer simulator, mutual-inductor tester simulator, voltage load box simulator, the operating voltage of whole system and electric current be far smaller than true environment voltage and current, can realize under trouble free service voltage, electric current and to provide reliable safety guarantee for the examination of student's voltage transformer (VT) test.
Controller of the present invention meets the technical requirement of standard potential transformer calibrating wiring simulation system or other similar emulation examination systems completely, can realize all electronic, judge in real time, exactly the on off operating mode of simulation connection, and in time, constantly result data is uploaded to slave computer and does wiring misinterpretation etc. is further processed.
Slave computer can carry out test connection judgement to the simulation connection connection terminal of each simulator, and actual tests wiring situation can be shown on computers, excite to greatest extent comprehension and the actual operational capacity of student to work on the spot, improve rapidly student's operative skill, there is stronger production practical significance.
Claims (10)
1. a voltage transformer (VT) emulation examination system, is characterized in that, the student's machine that comprises teacher's machine, the communication connection of some and teacher's machine, wherein,
Projector equipment, voltage transformer (VT) detection entity platform that teacher's machine comprises host computer, is connected with host computer; Described host computer is for controlling the communication of whole system, and the slave computer parameter that realizes student's machine issues, voltage transformer (VT) training function; Described voltage transformer (VT) detects entity platform and comprises actual current lifting device, actual standard voltage transformer (VT), actual tested voltage transformer (VT), actual current Burden box, actual tester, actual pressure regulator;
Described student's machine comprises slave computer, controller, pressure regulator, standard potential transformer simulator, tested voltage transformer (VT) simulator, stepup transformer simulator, mutual-inductor tester simulator, voltage load box simulator with slave computer communication connection, described each simulator is all connected with controller, wherein
Described voltage load box simulator is for voltage load box simulator that is virtually reality like reality;
Described standard potential transformer simulator is for standard potential transformer simulator function that is virtually reality like reality;
Described tested voltage transformer (VT) simulator is for the function of tested voltage transformer (VT) that is virtually reality like reality;
Described stepup transformer simulator is for the function of stepup transformer that is virtually reality like reality;
Described mutual-inductor tester simulator is for the function of mutual-inductor tester that is virtually reality like reality;
Described each simulator 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 its corresponding slave computer, and carries out the steering order that slave computer sends;
Slave computer is for uploading information, receive the parameter that host computer is set each simulator controller sending controling instruction information, reception controller, and carry out signal disposal and analysis, actual tests wiring situation in the time that arranging on voltage transformer (VT) interface, is shown in the examination of slave computer.
2. the voltage transformer (VT) emulation examination system as described in any one in claim 1, it is characterized in that, 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 a terminals driver output module, tail terminals Gather and input module, polarity, is connected with RS232 transceiver module is two-way.Wherein,
Terminals driver output module, for receiving the drive control signal that MCU module is sent, applies low level to wiring the end of a thread to be judged;
The tail terminals Gather and input module line tail end signal scanning that is used for achieving a butt joint, inquiry judge the wiring level state of other wiring tail ends unexpectedly except band one by one;
Polarity and signal discrimination module are used for realizing the amplification of signal, and realize the analog to digital conversion of signal;
RS232 transceiver module for the signal of tail terminals Gather and input module is transferred to host computer or by the steering order communication of host computer to corresponding simulator;
MCU module is used for control head terminals driver output module drive terminal stud to be judged, 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 to other each module for power supply.
3. voltage transformer (VT) emulation examination system as claimed in claim 1 or 2, it is characterized in that, described host computer is provided with examination voltage transformer (VT) interface is set, and described examination arranges voltage transformer (VT) interface and is divided into voltage transformer (VT) parameter setting area, voltage transformer (VT) nameplate viewing area, voltage transformer (VT) data area;
Described voltage transformer (VT) parameter display region can arrange the supplemental characteristic of the voltage transformer (VT) of each student's machine, and described parameter comprises no-load voltage ratio, polarity, load, grade, error;
Described voltage transformer (VT) nameplate viewing area, for showing in real time the setting value of parameters;
Voltage transformer (VT) data area shows fully loaded and underloading data in time in real time according to the setting value of parameters;
Described slave computer is provided with examination voltage transformer (VT) interface is set, and described interface is divided into Examination Rule viewing area, monitors area, voltage transformer (VT) nameplate region;
Described Examination Rule viewing area shows the Examination Rule that teacher's machine arranges and pass down;
Described supervision area 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 and follow the actual tester angular difference value drawing of sampling for showing dial gauge part;
Described voltage transformer (VT) nameplate viewing area shows no-load voltage ratio, the load that teacher arranges, the data value of grade.
4. voltage transformer (VT) emulation examination system as claimed in claim 1, is characterized in that, described student's machine has six.
5. the method for work of the voltage transformer (VT) emulation examination system as described in any one in claim 1 ~ 4, is characterized in that, comprises the following step:
Step 1: upper airborne Examination Rule viewing area, read the slave computer of all logins simultaneously, for each student's machine creates one, voltage transformer (VT) bound of parameter face and thread Thread, data buffer, NetworkStream stream can be set;
Step 2: as loaded Examination Rule viewing area success, the supplemental characteristic of teacher's voltage transformer (VT) to each slave computer in the voltage transformer (VT) parameter setting area of host computer arranges modification, otherwise returns to host computer homepage;
Step 3: slave computer loads examination voltage transformer (VT) interface, opens first serial simultaneously and is connected with actual tester, if success is carried out subsequent step, otherwise returned to slave computer homepage;
Step 4: first serial is entrusted and monitored, the data of the actual tester of real-time sense;
Step 5: slave computer is opened second serial and is connected with controller, if open just slave computer homepage immediately of failure, if opened successfully, carries out the following step;
Step 6: slave computer creates multithreading Thread, data buffer, NetworkStream stream, for long-range reception data are prepared, creates second serial and entrusts monitoring, the data that real-time sense controller sends;
Step 7: host computer transmits Examination Rule to the slave computer of each login, and send the supplemental characteristic of no-load voltage ratio, polarity, load (underloading), grade, error amount to the slave computer that sets supplemental characteristic;
Step 8: slave computer receives and shows no-load voltage ratio, load, three supplemental characteristics of grade supplemental characteristic with the multithreading Thread of its establishment, and in the time that host computer sends data again, this multithreading Thread can monitor and again receive data in real time; Meanwhile, slave computer receives and shows with the Examination Rule that multithreading Thread sends host computer, and in the time that host computer sends data again, multithreading Thread can monitor and again receive Examination Rule in real time;
Step 9: the data that monitoring controller sends are monitored with the trust of second serial in the region, viewing area of slave computer Examination Rule viewing area, int[in the time that data are different] number2=new int[48] reception data, and with the Split(of string) method decomposition data, can intelligentizedly show in real time in time every single line that student connects by the mode of analyzing data line, and can judge mistake;
Step 10: when the program of slave computer judges after all wiring successes, enable Thread, flow and send the no-load voltage ratio, polarity, the data that obtain from host computer by array to actual tester with NetworkStream, as long as the wiring error of existence, can not send data to tester, tester, all the time in zero condition, data not show;
Step 11: actual tester receives after data, student could carry out verification to voltage transformer (VT) and occur data, manual adjustments pressure regulator, the data that actual tester sends according to slave computer are carried out processes and displays, and send the detailed data of dial gauge every bit to slave computer;
Step 12: slave computer is enabled the trust of first serial and monitored, and in the time listening to actual tester buffer zone and have data, slave computer receives data by array, then carry out verification, data are directly abandoned in verification failure, and verification succeeds array storage data reaches and receives data object;
Step: 13: decomposition data, obtain dial gauge, ratio, angular difference data, reach and show actual tester data object.
6. the method for work of voltage transformer (VT) emulation examination system as claimed in claim 5, it is characterized in that, in step 12, slave computer is taked odd even to the data that receive, packet header 0x55, wrap big or small verification mode, verification succeeds array int[] number=new int[48] storage data.
7. the method for work of voltage transformer (VT) emulation examination system as claimed in claim 5, is characterized in that, in step 1, the no-load voltage ratio on each slave computer interface, polarity, load, grade, these five of error amounts all obtain at random with Random.
8. the method for work of voltage transformer (VT) emulation examination system as claimed in claim 7, is characterized in that, in step 7, teacher's machine is all modified five supplemental characteristics after setting, the corresponding slave computer that host computer could send.
9. the method for work of voltage transformer (VT) emulation examination system as claimed in claim 5, it is characterized in that, in the time that slave computer listens to data buffer maxPacket variation, slave computer receives data again, storage data, decomposition data, upgrades dial gauge, angular difference, than difference data, reaches the dial gauge that upgrades in time in real time, angular difference, than difference data object.
10. the method for work of voltage transformer (VT) emulation examination system as claimed in claim 5, it is characterized in that, in step 9, in the region, viewing area of slave computer Examination Rule viewing area, when each simulator wiring is correct, represent with black line, when wiring error, represent with red line.
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