CN103777168B - A kind of voltage transformer (VT) emulation test system and method for work - Google Patents
A kind of voltage transformer (VT) emulation test system and method for work Download PDFInfo
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Abstract
The invention provides a kind of voltage transformer (VT) emulation test system and method for testing thereof, student's machine that described system comprises teacher's machine, communicates to connect with teacher's machine.Described teacher's machine comprises host computer, the projector equipment be connected with host computer, voltage transformer (VT) detect entity platform, described student's machine comprises slave computer and voltage transformer (VT) detection simulation platform, the simulator that described voltage transformer (VT) detection simulation platform comprises controller, each voltage transformer (VT) of being connected with controller is tested.Utilize native system, the present invention utilizes teacher's machine, achieves a kind of system showing in real time in time and record that can complete dial gauge when voltage transformer (VT) verifies, ratio, angular difference value.And the interface of host computer arranges voltage transformer (VT) verification wiring diagram.
Description
A kind of voltage transformer (VT) emulation test system and method for work
Technical field
The present invention relates to electric energy mutual-inductor field, particularly relate to a kind of voltage transformer (VT) emulation test system and method for testing.
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 voltage transformer (VT) 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 voltage transformer (VT) emulation test system, comprising one and there is projector equipment teacher 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, voltage transformer (VT) detect entity platform; Described host computer, for controlling the communication of whole system, completes timely display and the record in real time of dial gauge when voltage transformer (VT) verifies, ratio, angular difference value; Described voltage transformer (VT) detects entity platform and comprises actual stepup transformer, actual standard voltage transformer (VT), actual tested voltage transformer (VT), actual current Burden box, actual tester, actual pressure regulator; Described voltage transformer (VT) detects entity platform and realizes in real current, voltage transformer (VT) laboratory actual error calibrating training on operation;
Described student's machine comprises slave computer, and described slave computer and host computer communicate to connect.
Further, described host computer is provided with test setting voltage transformer (VT) interface, and described interface is divided into surveillance zone, example district, voltage transformer (VT) tester wiring diagram district;
Described surveillance zone for show actual tester sample draw percentage tabular value, than difference, angular difference value;
Described example district be used for by follow actual tester sampling draw reach regulatory requirements checkpoint percentage tabular value, show in real time than difference, angular difference value;
Described voltage transformer (VT) tester wiring diagram district is for showing correct voltage transformer (VT) verification wiring diagram.
Further, described student's machine also comprises the controller, pressure regulator, standard potential transformer simulator, tested voltage transformer (VT) simulator, voltage booster simulator, mutual-inductor tester simulator, the voltage load box simulator that communicate to connect with slave computer, each simulator described is all connected with controller, wherein
Described voltage load box simulator is used for voltage load box simulator that is virtually reality like reality;
Described standard potential transformer simulator is used for standard potential transformer simulator function that is virtually reality like reality;
Described tested voltage transformer (VT) simulator is used for the function of tested voltage transformer (VT) that is virtually reality like reality;
Described voltage booster simulator is used for the function of stepup transformer 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, show during by actual tests wiring condition on the test setting voltage transformer (VT) interface 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 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 inquiry is except being with the level state judging wiring other wiring tail ends unexpected 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.
Further, described student's machine has six.
The method of testing of voltage transformer (VT) emulation test system described above, comprises the following step:
Step 1: host computer loads test setting voltage transformer (VT) interface, opens serial ports and is connected with actual tester, if success, then carries out subsequent step, otherwise returns host computer homepage;
Step 2: host computer creates data buffer; Serial ports creates to entrust and monitors, the data of the actual tester of real-time sense;
Step 3: when listening to data buffer and having data, receives data, verifies, and verify unsuccessfully directly discard, verification succeeds is storage data then, reaches and receives data object;
Step 4: decomposition data, obtains dial gauge, ratio, angular difference data, in real time the actual tester data of display.
Further, in step 3, host 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.
Further, in step 4, host computer array int [] number decomposition data, obtains dial gauge, ratio, angular difference data.
Further, formula (number [5] * 127) * 65536+number [4] * 256+number [3] is utilized in step 4))/1000 decomposition dial gauge data.
Further, in step 4, utilize the TextChenged event of Text, the value of monitoring dial gauge, get when hour angle difference when dial gauge reaches the actual checkpoint of regulatory requirements, compare difference, ratio now, angular difference value are changed out whole according to the whole stipulations of change in time, reach the actual checkpoint data object of display in real time.
Beneficial effect of the present invention is:
The present invention utilizes teacher's machine, achieves a kind of system showing in real time in time and record that can complete dial gauge when voltage transformer (VT) verifies, ratio, angular difference value.And the interface of host computer arranges voltage transformer (VT) verification wiring diagram, teacher can carry out teaching and the explanation of wiring by projector equipment.
Simultaneously, the present invention also 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, voltage booster simulator, voltage load box 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 voltage transformer (VT) to provide reliable safety guarantee.
Controller of the present invention meets the technical requirement of standard potential transformer calibrating wiring simulation system or other similar emulation test 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 that voltage transformer (VT) detects entity platform.
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 voltage booster 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 voltage transformer (VT) 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.
As shown in Figure 2, described voltage transformer (VT) detects entity platform and comprises actual stepup transformer, actual standard voltage transformer (VT), actual tested voltage transformer (VT), actual current Burden box, actual tester, actual pressure regulator, and connects.
Described host computer, for controlling the communication of whole system, completes timely display and the record in real time of dial gauge when voltage transformer (VT) verifies, ratio, angular difference value.
Under " test " duty, host computer utilizes the internal error checking routine voltage transformer (VT) carried to detect entity platform and uses real voltage mutual inductor, voltage transformer (VT), voltage load box, voltage load box, mutual-inductor tester, Regulation Control case, transformer error test board etc., realizes in real current, voltage transformer (VT) laboratory actual error calibrating training on operation.
Described host computer is provided with test setting voltage transformer (VT) interface, and described interface is divided into surveillance zone, example district, voltage transformer (VT) tester wiring diagram district;
Described surveillance zone for show actual tester sample draw percentage tabular value, than difference, angular difference value;
Described example district be used for by follow actual tester sampling draw reach regulatory requirements checkpoint percentage tabular value, show in real time than difference, angular difference value;
Described voltage transformer (VT) tester wiring diagram district is for showing correct voltage transformer (VT) verification wiring diagram.
(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, and 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 voltage transformer (VT) detects anti-true 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, voltage booster simulator.
Slave computer is connected by RS232 serial ports with controller, and standard potential transformer simulator, tested voltage transformer (VT) simulator, mutual-inductor tester simulator, voltage load box simulator are all connected with controller.Described slave computer can be arranged the parameter of each simulator, and makes the misinterpretation of student's pair of connecting wires.
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) being positioned at housing is made up of winding, Secondary Winding, iron core and an insulation of mutually insulated.Its principle of work and transformer are substantially identical, when applying a voltage U 1 on a winding, in iron core, just produce a magnetic flux φ, according to the law of electromagnetic induction, then in Secondary Winding, just produce 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 in proportion, i.e. 100V.
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, these five 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, host computer by controller to identify timely and accurately each end number with other 4 to hold number relation (being turned on or off).Know the scan-type algorithm that method for distinguishing adopts controller MCU integrated.
It should be noted that, it is 35KV/100V, 10KV/100V that the present invention can realize simulation no-load voltage ratio value.Simulation grade 0.05 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, wiring voltage is become very low (generally only having about 10V).
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 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, 5VA, 10VA, 20VA, 40VA respectively, described 5 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 5 wiring is respectively: 1a, 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 with other 4 to hold number relation (being turned on or off).Know the scan-type algorithm that method for distinguishing adopts controller MCU integrated.
Described voltage load box simulator makes wiring voltage become very low (generally only having about 10V), overload capacity 120%, rated voltage can be simulated: 100V, power factor are 0.8, simulator has communication import, by controller and host computer online, by host computer, load gear is set.
Reality simulation voltage load box outward appearance, voltage load box simulator outward appearance and real voltage load box outward appearance completely the same, the binding post wherein 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. voltage booster simulator
As shown in Figure 6, voltage booster simulator comprise housing, the some simulation connection terminals be positioned at 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, these 5 wiring of controller identifiable design be interconnected state.The head end of 5 wiring is respectively: 1a, 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 with other 3 to hold number relation (being turned on or off).Know method for distinguishing and adopt scan-type.
Described voltage booster 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 stepup transformer training examination reliable safety guarantee is provided.Simulation up voltage 0 ~ 50KV of voltage booster simulator, simulation overload capacity 120%.
Reality simulation stepup transformer outward appearance, voltage booster simulator outward appearance and true stepup transformer outward appearance completely the same, the binding post wherein on voltage booster 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, arranges no-load voltage ratio and polarity, boost value 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
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, TV transformer polarity mistake, 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 voltage transformer (VT) 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 voltage transformer (VT) 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, and inquiry is except being with the level state judging wiring other wiring tail ends unexpected 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 testing of native system is described in detail.Comprise the following step:
Step 1: host computer loads test setting voltage transformer (VT) interface, opens serial ports and is connected with actual tester, if success, then carries out subsequent step, otherwise returns host computer homepage.
Step 2: host computer creates data buffer; Serial ports creates to entrust and monitors, the data of the actual tester of real-time sense;
Step 3: when listening to data buffer and having data, receives data with array byte [] b, carries out the verification mode of odd even, packet header 0x55, bag size, and verification succeeds array int [] number=newint [48] stores data.
Step 4: decomposition data, obtains dial gauge, ratio, angular difference data, in real time the actual tester data of display.By array int [] number decomposition data, obtain dial gauge data (number [5] * 127) * 65536+number [4] * 256+number [3]))/1000, ratio, angular difference data, reach the actual tester data object of display.
It should be noted that, utilize the TextChenged event of Text, the value of monitoring dial gauge, get when hour angle difference when dial gauge reaches the actual checkpoint of regulatory requirements, compare difference, ratio now, angular difference value are changed out whole according to the whole stipulations of change in time, reach the actual checkpoint data object of display in real time.
Beneficial effect of the present invention is:
The present invention utilizes teacher's machine, achieves a kind of system showing in real time in time and record that can complete dial gauge when voltage transformer (VT) verifies, ratio, angular difference value.And the interface of host computer arranges voltage transformer (VT) verification wiring diagram, teacher can carry out teaching and the explanation of wiring by projector equipment.
Simultaneously, the present invention also 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, voltage booster 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 be implemented under safe operating voltage, electric current as the training of student's voltage transformer (VT) metering provides reliable safety guarantee.
Controller of the present invention meets the technical requirement of standard potential transformer calibrating wiring simulation system or other similar emulation test 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 (8)
1. a method of testing for voltage transformer (VT) emulation test system, described voltage transformer (VT) emulation test system, comprises one and has teacher's machine of projector equipment, 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, voltage transformer (VT) detect entity platform; Described host computer, for controlling the communication of whole system, completes timely display and the record in real time of dial gauge when voltage transformer (VT) verifies, ratio, angular difference value; Described voltage transformer (VT) detects entity platform and comprises actual stepup transformer, actual standard voltage transformer (VT), actual tested voltage transformer (VT), actual current Burden box, actual tester, actual pressure regulator; Described voltage transformer (VT) detects entity platform and realizes in real current, voltage transformer (VT) laboratory actual error calibrating training on operation;
Described student's machine comprises slave computer, and described slave computer and host computer communicate to connect;
Described host computer is provided with test setting voltage transformer (VT) interface, and described interface is divided into surveillance zone, example district, voltage transformer (VT) tester wiring diagram district;
Described surveillance zone for show actual tester sample draw percentage tabular value, than difference, angular difference value;
Described example district be used for by follow actual tester sampling draw reach regulatory requirements checkpoint percentage tabular value, show in real time than difference, angular difference value;
Described voltage transformer (VT) tester wiring diagram district is for showing correct voltage transformer (VT) verification wiring diagram;
It is characterized in that, described method comprises the following step:
Step 1: host computer loads test setting voltage transformer (VT) interface, opens serial ports and is connected with actual tester, if success, then carries out subsequent step, otherwise returns host computer homepage;
Step 2: host computer creates data buffer; Serial ports creates to entrust and monitors, the data of the actual tester of real-time sense;
Step 3: when listening to data buffer and having data, receives data, verifies, and verify unsuccessfully directly discard, verification succeeds is storage data then, reaches and receives data object;
Step 4: decomposition data, obtains dial gauge, ratio, angular difference data, in real time the actual tester data of display.
2. the method for testing of voltage transformer (VT) emulation test system as claimed in claim 1, it is characterized in that, in step 3, host 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 testing of voltage transformer (VT) emulation test system as claimed in claim 2, it is characterized in that, in step 4, host computer array int [] number decomposition data, obtains dial gauge, ratio, angular difference data.
4. the method for testing of voltage transformer (VT) emulation test system as claimed in claim 3, it is characterized in that, utilize formula (number [5] * 127) * 65536+number [4] * 256+number [3] in step 4))/1000 decomposition dial gauge data.
5. the method for testing of voltage transformer (VT) emulation test system as claimed in claim 1, it is characterized in that, in step 4, utilize the TextChenged event of Text, the value of monitoring dial gauge, get when hour angle difference, than difference when dial gauge reaches the actual checkpoint of regulatory requirements, ratio now, angular difference value are changed out whole according to the whole stipulations of change in time, reach the actual checkpoint data object of display in real time.
6. the method for testing of voltage transformer (VT) emulation test system as claimed in claim 1, it is characterized in that, described student's machine also comprises the controller, pressure regulator, standard potential transformer simulator, tested voltage transformer (VT) simulator, voltage booster simulator, mutual-inductor tester simulator, the voltage load box simulator that communicate to connect with slave computer, each simulator described is all connected with controller, wherein
Described voltage load box simulator is used for voltage load box simulator that is virtually reality like reality;
Described standard potential transformer simulator is used for standard potential transformer simulator function that is virtually reality like reality;
Described tested voltage transformer (VT) simulator is used for the function of tested voltage transformer (VT) that is virtually reality like reality;
Described voltage booster simulator is used for the function of stepup transformer 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, show during by actual tests wiring condition on the test setting voltage transformer (VT) interface of slave computer.
7. the method for testing of voltage transformer (VT) emulation test system as claimed 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 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 inquiry is except being with the level state judging wiring other wiring tail ends unexpected 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.
8. the method for testing of voltage transformer (VT) emulation test system as claimed in claim 1, it is characterized in that, described student's machine has six.
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