CN107356828A - Transformer voltage ratio simulation and training device - Google Patents
Transformer voltage ratio simulation and training device Download PDFInfo
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- CN107356828A CN107356828A CN201710459085.3A CN201710459085A CN107356828A CN 107356828 A CN107356828 A CN 107356828A CN 201710459085 A CN201710459085 A CN 201710459085A CN 107356828 A CN107356828 A CN 107356828A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
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- Testing Electric Properties And Detecting Electric Faults (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
本发明公开了一种变压器变比模拟实训装置，包括高压侧接线端子、低压侧接线端子，各个高压侧接线端子与N接线端子之间通过控制开关均连接有分压电路，各个分压电路的分压输出端通过控制开关分别对应与各低压侧接线端子连接，变压器变比测试用模块的各控制开关分别与控制器电连接，所述控制器用于根据操作员的指令信号输出控制信号，控制变压器变比测试用模块的各控制开关的闭合或断开，实现变压器的多种变比模拟。其采用电子电路或模块替代变压器内部结构，来实现变压器变比功能模拟的模拟，用于教学培训，具有适应范围广、消耗的功率小，与现场实际相符等特点。
The invention discloses a transformer transformation ratio simulation training device, which comprises a high-voltage side terminal and a low-voltage side terminal. Each high-voltage side terminal and N terminal are connected with a voltage dividing circuit through a control switch. Each voltage dividing circuit The divided voltage output terminals of the transformer are respectively connected to the low-voltage side terminals through the control switches, and the control switches of the transformer ratio test module are respectively electrically connected to the controller, and the controller is used to output the control signal according to the operator's command signal. Control the closing or opening of each control switch of the transformer transformation ratio test module to realize various transformation ratio simulations of the transformer. It uses electronic circuits or modules to replace the internal structure of the transformer to realize the simulation of the transformation ratio function of the transformer, which is used for teaching and training. It has the characteristics of wide adaptability, low power consumption, and conforms to the actual situation on site.
Description
Technical field
The present invention relates to a kind of actual training device, more particularly to a kind of transformer voltage ratio simulation and training device.
Background technology
Due to the making material of transformer, even if a capacity only tens KVA transformer, its weight also has hundred
More than kilogram.So a real transformer is transported to scene, it will expend substantial amounts of human and material resources, financial resources.So carry out
During transformer functional test training, generally use simulation model gives training, and is giveed training using simulation model, can only understand
The structure of transformer, and detection, experiment and quality judgement to transformer etc., the training for having certain technology content can not but enter
OK.
Meanwhile even if a real transformer is transported into scene, and the normal civilian and work transformer in scene is in high pressure
Side commonly enters the high-tension electricity that voltage is 10kV or more than 10kV, when this is for entering line transformer functional test training, there is
Great potential safety hazard.Applicant designs a kind of analogue transformer to solve the above problems, and it can be seen outside transformer
Portion's structure, there is transformer function again, you can carry out conventional electrical test, it is therefore desirable to one kind using electronics and electrician's mode come
Realize the no-load voltage ratio test actual training device of transformer voltage ratio functional simulation.
The content of the invention
The purpose of the present invention is the deficiency corresponding to prior art, there is provided a kind of transformer voltage ratio simulation and training device,
It uses electronics to substitute inside transformer structure with electrician's mode i.e. electronic circuit or module, to realize transformer voltage ratio function mould
The simulation of plan, for teaching, training, have wide adaptation range, the power of consumption small, be electric power the features such as being actually consistent with scene
The preferable selection as teaching operation training such as teaching, training demonstration.
The purpose of the present invention is realized using following proposal：A kind of no-load voltage ratio test actual training device of analogue transformer,
Including high-pressure side binding post, low-pressure side binding post, opened between each high-pressure side binding post and N binding posts by control
Pass is respectively connected with bleeder circuit, and the partial pressure output end of each bleeder circuit is corresponded to and each low-pressure side wiring respectively by controlling switch
Terminal is connected, and each controlling switch of transformer voltage ratio module for testing is electrically connected with the controller respectively, and the controller is used for root
According to the command signal output control signal of operator, control the closure of each controlling switch of transformer voltage ratio module for testing or break
Open, realize a variety of no-load voltage ratios simulation of transformer.
The no-load voltage ratio test of the analogue transformer includes multigroup bleeder circuit with actual training device, per the partial pressure of component volt circuit
Than difference, the first bleeder circuit between high-pressure side A binding posts and N binding posts, and high pressure are included per component volt circuit
Between side B binding posts and N binding posts the 3rd point between the second bleeder circuit and high-pressure side C binding posts and N binding posts
Volt circuit, multigroup bleeder circuit are arranged in parallel between high-pressure side binding post and N binding posts, are led between each group bleeder circuit
Controlling switch is crossed to switch over.
First bleeder circuit of each group bleeder circuit, the second bleeder circuit, one end of the 3rd bleeder circuit pass through relay
Normally opened contact be connected respectively with node A7, B7, C7, the first bleeder circuit, the second bleeder circuit per component volt circuit, the 3rd
The other end of bleeder circuit is connected with N binding posts, per the first bleeder circuit of component volt circuit, the second bleeder circuit, the 3rd
The partial pressure output end of bleeder circuit is connected with node a7, b7, c7 respectively by the normally opened contact of relay, A7, B7, C7 points of node
It is not directly connected to high-pressure side A, B, C binding post, or set between node A7, B7, C7 and high-pressure side A, B, C binding post
Put relay, node a7, b7, c7 are directly connected to low-pressure side a, b, c binding post respectively, or node a7, b7, c7 with it is low
Relay is set between pressure side a, b, c binding post.
The relay is controlled by controller, realizes no-load voltage ratio control.
Relay is controlled by shunting switch, realizes no-load voltage ratio control, and each gear of shunting switch corresponds to a kind of no-load voltage ratio.
Each bleeder circuit is made up of the two no-load voltage ratio tests connected with resistive load, or is made up of a rheostat.
Preferably, no-load voltage ratio test uses resistance with resistive load, and no-load voltage ratio test function of the invention simulation uses resistance, by
In resistance is adjustable, precision is high so that intrinsic standoff ratio precision is also high, is easy to design circuit, and small volume, cost be low and the property of resistance
Can be stable.10KVA/0.4KVA no-load voltage ratio is such as simulated, circuit of the invention determines each resistance after debugging, surveyed with no-load voltage ratio
Examination instrument test when can quickly, be accurate to up to 10KVA/0.4KVA.
The no-load voltage ratio test of analogue transformer actual training device includes a component volt circuit, and the component volt circuit includes height
Press between side A binding posts and N binding posts between the first bleeder circuit, and high-pressure side B binding posts and N binding posts the
3rd bleeder circuit between two bleeder circuits and high-pressure side C binding posts and N binding posts, each partial pressure electricity of the component volt circuit
Road uses the adjustable rheostat of intrinsic standoff ratio, and the adjustable rheostat of intrinsic standoff ratio is connected with controller, the control
Device processed is used for the command signal output control signal according to operator, controls the intrinsic standoff ratio of the adjustable rheostat of intrinsic standoff ratio,
Realize a variety of no-load voltage ratios simulation of transformer.
The adjustable rheostat of intrinsic standoff ratio uses magnetic control rheostat.
The controller is communicated with computer or Digiplex, for receiving the finger of computer or Digiplex
Signal is made, or, the controller is communicated with touch-screen, for receiving the command signal of touch-screen.
Present invention has the advantage that：The transformer voltage ratio simulation and training device of the present invention is using electronics and electrician's mode
That is electronic circuit or module substitutes the internal structure of real transformer such as iron core, coil etc., to realize transformer voltage ratio function
Simulation, for teaching, training.Test operation is using upper also as real transformer.The device has wide adaptation range, disappeared
The power of consumption is small, the features such as being actually consistent with scene, is the preferable choosing as operation training of imparting knowledge to students such as electric power teaching, training demonstration
Select.
The no-load voltage ratio test of the present invention is applied to actual training device " analogue transformer " of the present invention, outside existing transformer
Shape, it can be seen that transformer external structure；Have transformer function again, you can carry out conventional electrical test, operate with also with
Real transformer is the same.Skills training is carried out with " analogue transformer " of the present invention, training and teaching effect can be effectively improved, make
Member is relatively easy to grasp transformer device structure, principle and method of testing；Save the human and material resources in terms of educational training and time
Cost, improve the comprehensive benefit of educational training.By training, employee is set to obtain consolidating in professional knowledge and technical ability and be lifted,
The standardized work program of related work is grasped, operating efficiency, the performance of enterprises is improved, reduces the generation of accident.
Brief description of the drawings
Fig. 1 is the principle schematic of the analogue transformer of the present invention；
Fig. 2 is a kind of embodiment of the schematic diagram of the Insulation Resistance of Transformer test training module of the present invention；
Fig. 3 is another embodiment of the schematic diagram of the Insulation Resistance of Transformer test training module of the present invention；
Fig. 4 is the schematic diagram of the Anti-misoperation circuit of the present invention；
Fig. 5 is a kind of embodiment of the schematic diagram of the transformer capacity test training module of the present invention；
Fig. 6 is another embodiment of the schematic diagram of the transformer capacity test training module of the present invention；
Fig. 7 is the schematic diagram of the transformer voltage ratio module for testing of the present invention；
Fig. 8 is the schematic diagram of the DCR of Transformer module for testing of the present invention；
Fig. 9 is the schematic diagram of the transformer loss test training module of the present invention.
Embodiment
Transformer voltage ratio simulation and training device disclosed by the invention can be arranged to a single device, and it also has
Power module, controller, emulation transformer shell etc., only realize no-load voltage ratio functional simulation, can also be with other each functional simulations
Actual training device is arranged in an emulation transformer shell together, is shared power module, controller, housing etc., is collectively formed one
Individual analogue transformer.
Referring to Fig. 1 to Fig. 9, a kind of analogue transformer, including high-pressure side binding post（A、B、C）, low-pressure side binding post
（a、b、c、N）, ground terminal, controller, power module, transformer capacity test training module and Insulation Resistance of Transformer
Test training module, transformer loss test training module, transformer voltage ratio module for testing, DCR of Transformer are surveyed
One or more in module on probation.The power module is used to power for whole device.Power module is used to exchange 220V
It is converted into 24V DC voltages and 5V DC voltages.The controller of the present invention uses PLC control panels.Preferably, own in the present invention
Controlling switch uses relay.Certainly the controlling switch of the present invention can also use the switch that other can be controlled by a controller.This
Invention passes through controller by controlling the controlling switch in each test training module, so as to control each test training module
Open and control each test training module to connect or disconnect with corresponding binding post, make respectively to test during the various tests of carry out
It is not interfere with each other with training module.
Analogue transformer can be not provided with instruction inputting device（Such as button, touch-screen）And suggestion device（Such as acousto-optic,
It can be display screen）Deng.The controller can be by way of existing line or wirelessly with computer or other equipment such as
Digiplex is communicated, and operator is by way of computer or other equipment send command signal by existing line or wireless
Mode pass to controller.Certainly, analogue transformer can also set instruction inputting device（Such as button, touch-screen）With carry
Showing device（Such as acousto-optic, can be display screen）, it is connected respectively with controller.By instruction inputting device input instruction signal,
Alarmed by suggestion device or display device or status display etc..
The Insulation Resistance of Transformer test includes megger test resistive load, the high-pressure side with training module
Megger test resistive load, the high pressure are connected with by controlling switch between binding post and low-pressure side binding post
Megger test resistive load, the low pressure side joint are connected with by controlling switch between side terminal and ground terminal
Megger test resistive load is connected with by controlling switch between line terminals and ground terminal, Insulation Resistance of Transformer is surveyed
Each controlling switch of training module on probation is electrically connected with the controller respectively, and the controller is used for the command signal according to operator
Output control signal, control closure or the disconnection of each controlling switch of Insulation Resistance of Transformer test training module.It is described exhausted
Edge resistance test is parallel with megger test capacitive load with the both ends of resistive load.Megger test resistive load
The Insulation test of analogue transformer can be realized.Megger test capacitive load is set to be born with megger test with resistive
Carrying parallel connection can realize that analogue transformer absorptance is tested, and and can mitigate on the premise of ensureing to realize experiment close to reality
Weight of equipment, it is cost-effective.
Referring to Fig. 2, a kind of Insulation Resistance of Transformer test of embodiment includes two groups of megger tests with training module
With resistive load, the both ends point of first group of megger test resistive load in two groups of megger test resistive loads
It is not connected to by controlling switch between high-pressure side binding post and low-pressure side binding post, two groups of megger tests are with resistive
Second group of megger test in load is connected to high pressure side terminal by controlling switch respectively with the both ends of resistive load
Between son and ground terminal；First group of megger test resistive load in two groups of megger test resistive loads
Both ends are connected between high-pressure side binding post and low-pressure side binding post by controlling switch respectively, two groups of megger tests
Low-pressure side is connected to by controlling switch respectively with the both ends of resistive load with second group of megger test in resistive load
Between binding post and ground terminal；First group of megger test in two groups of megger test resistive loads is with resistive
The both ends of load are connected between high-pressure side binding post and ground terminal by controlling switch respectively, two groups of megger tests
Low-pressure side is connected to by controlling switch respectively with the both ends of resistive load with second group of megger test in resistive load
Between binding post and ground terminal.Every group of megger test resistive load includes a megger test and born with resistive
Carry or multiple megger test resistive loads, multiple megger tests in every group of megger test resistive load
It is in parallel with resistive load, and multiple megger tests in every group of megger test resistive load are distinguished with resistive load
Loop where being accessed by controlling switch, controlling switch control is set to access the load resistance in each loop.
Two groups of megger tests of the present embodiment are with first group of megger test resistive load in resistive load
Both ends be connected to respectively by controlling switch between high-pressure side binding post and low-pressure side binding post, two groups of insulaion resistances are surveyed
Second group of megger test in resistive load on probation is connected to high pressure by controlling switch respectively with the both ends of resistive load
Between side terminal and ground terminal.Every group of megger test resistive load includes multiple megger tests with resistive
Load.One end of each megger test resistive load of first group of megger test resistive load passes through relay
Normally opened contact is connected with node A10, and first group of megger test is with each megger test resistive load of resistive load
The other end be connected with node b10, second group of megger test is with each megger test resistive load of resistive load
One end be connected by the normally opened contact of relay with node C10, each insulation of second group of megger test resistive load
The other end of resistance test resistive load is connected with node PE10, normally opened contacts and high-pressure side of the node A10 by relay
Binding post is connected, and node C10 is connected by the normally opened contact of relay with high-pressure side binding post, and node b10 passes through relay
The normally opened contact of device is connected with low-pressure side binding post, and node PE10 is connected by the normally opened contact of relay with ground terminal.
The physical circuit of the Insulation Resistance of Transformer test training module of the present embodiment is as follows：First group of insulaion resistance is surveyed
Resistive load on probation includes megger test resistive load R1, R2, R3, second group of megger test resistive load bag
Megger test resistive load R4, R6, R8 are included, megger test passes through relay J14 with resistive load R1 one end
Normally opened contact be connected with node A10, megger test is connected with the resistive load R1 other end with node b10.Insulated electro
Resistance test is connected with resistive load R4 one end by relay J14 normally opened contact with node C10, megger test resistance
Property load R1 the other end be connected with node PE10.Megger test passes through relay J13's with resistive load R2 one end
Normally opened contact is connected with node A10, and megger test is connected with the resistive load R2 other end with node b10.Insulaion resistance
Test is connected with resistive load R6 one end by relay J13 normally opened contact with node C10, and megger test is with resistive
The load R6 other end is connected with node PE10.Megger test passes through the normal of relay J12 with resistive load R3 one end
Open contact to be connected with node A10, megger test is connected with the resistive load R3 other end with node b10.Insulaion resistance is surveyed
Resistive load R8 on probation one end is connected by relay J12 normally opened contact with node C10, and megger test is born with resistive
The other end for carrying R8 is connected with node PE10.The normally opened contact and high-pressure side A terminals that node A10 passes through relay J10, J11
Son connection, node C10 are connected by relay J10 normally opened contact with high-pressure side C binding posts.Node b10 passes through relay
J15 normally opened contact is connected with low-pressure side b binding posts.The normally opened contact and ground terminal that node PE10 passes through relay J16
Connection.
During use during the Insulation Resistance of Transformer test training module of the present embodiment, by high-pressure side A, B, C binding post
Short circuit, by low-pressure side a, b, c binding post short circuit.Method of testing：When surveying high-pressure side to low-pressure side, J10/J11/J12/ is controlled
J13/J14/J15 is opened, and surveys high-pressure side to controlling J10/J11/J12/J13/J14/J16 during PE, when surveying low-pressure side to PE, control
J10/J11/J12/J13/J14/J15/J16 is opened.The coil of relay is controlled by controller.
Referring to Fig. 3, a kind of Insulation Resistance of Transformer test of embodiment includes three groups of megger tests with training module
With resistive load, the both ends point of first group of megger test resistive load in three groups of megger test resistive loads
It is not connected to by controlling switch between high-pressure side binding post and low-pressure side binding post, three groups of megger tests are with resistive
Second group of megger test in load is connected to high pressure side terminal by controlling switch respectively with the both ends of resistive load
Between son and ground terminal, the 3rd group of megger test resistive load in three groups of megger test resistive loads
Both ends are connected between high-pressure side binding post and ground terminal by controlling switch respectively.Every group of megger test is with resistive
Load includes a megger test resistive load or multiple megger test resistive loads, and every group of insulaion resistance is surveyed
Multiple megger tests in resistive load on probation are in parallel with resistive load, and in every group of megger test resistive load
Multiple megger tests accessed respectively by controlling switch with resistive load where loop, make controlling switch control access each
The load resistance in loop.
Every group of megger test of the present embodiment includes a megger test resistive load with resistive load.This
The physical circuit of the Insulation Resistance of Transformer test training module of embodiment is as follows：Megger test resistive load HV-
R1 one end is connected by relay K4 normally opened contact with node A6, and megger test is another with resistive load HV-R1's
End is connected by relay K5 normally opened contact with node a6, megger test capacitive load CD2 and megger test
In parallel with resistive load HV-R1, the megger test is touched with resistive load HV-R3 one end by the normally opened of relay K6
Point is connected with node A6, the normally opened contact and knot that megger test passes through relay K7 with the resistive load HV-R3 other end
Point PE6 connections, megger test is in parallel with megger test resistive load HV-R3 with capacitive load CD16, insulated electro
Resistance test is connected with resistive load HV-R5 one end by relay K8 normally opened contact with node a6, and megger test is used
The resistive load HV-R5 other end is connected by relay K9 normally opened contact with node PE6.Megger test is born with capacitive
It is in parallel with resistive load HV-R5 with megger test to carry CD35.Relay K4, relay K5 one end of coil are grounded,
Relay K4, the relay K5 other end of coil are connected with the output end OUTPUT0 of controller.Relay K6, relay
One end of K7 coil is grounded, relay K6, relay K7 coil output end OUTPUT1 of the other end with controller
Connection.Relay K8, relay K9 one end of coil are grounded, relay K8, relay K9 coil the other end with
The output end OUTPUT2 connections of controller.Node A6, a6, PE6 can respectively directly with high-pressure side A binding posts, low-pressure side a
Binding post, ground terminal connection.Preferably, touched between node A6 and high-pressure side A binding posts by the normally opened of relay K1
Point connection, connected between node a6 and low-pressure side a binding posts by relay K2 normally opened contact, node PE6 and earth terminal
Connected between son by relay K3 normally opened contact, relay K1 coil, relay K2 coil, relay K3 coil
One end be grounded, relay K1 coil, relay K2 coil, relay K3 coil the other end respectively with controller
Output end OUTPUT6, OUTPUT7, OUTPUT8 electrical connection.Controller can distinguish control relay K1 coil, relay
The energization or power-off of K2 coil, relay K3 coil.
When measuring insulaion resistance, by A, B, C three-phase short circuit, a, b, c three-phase short circuit.Such as when measuring transformer height is to low exhausted
During edge resistance, A, B, C three-phase short circuit connect megameter both ends after a, b, c three-phase short circuit, and megameter provides dc source.Therefore,
When measuring high-pressure side to low insulation resistance, high-pressure side insulation against ground resistance and low-pressure side insulation against ground resistance, A can be made to represent
High-pressure side, a represent low-pressure side, and PE represents ground.The present invention substitutes transformer winding wire using the method for capacitor parallel resistance
Circle, and can it can mitigate weight of equipment, cost-effective on the premise of ensureing to realize experiment close to reality.It is simultaneously enhancing simulation
The practicality of transformer, increases a set of stand-by circuit, student can 2 people operate the computer simultaneously.Megger test partial circuit is such as
Under：
When measurement height is to low insulation resistance, relay K1, K2, K4 and K5 closure, other relays disconnect, can now carried out
Height is to low insulation resistance measurement.Same method can measure high-pressure side insulation against ground resistance and low-pressure side insulation against ground resistance.
The present invention can also carry out absorptance test.Absorptance refer to megameter to transformer insulated pressing time is 60s and 15s when, survey
The ratio of the insulaion resistance of amount.When carrying out insulation measurement, the size of insulaion resistance when can obtain 60s and 15s, its ratio
The as absorptance of the capacity transformer.
Because megameter model is different, such as：5000V, 2500V, 1000V, 500V etc. are by mistake higher using voltage to prevent
Megameter, causes that electric capacity in part of detecting circuit is breakdown, and the present invention devises Anti-misoperation circuit, such as Fig. 4, such as low-pressure side pair
, it is specified that use megameter as 500V when PE tests insulaion resistance, if now using 1000V, Anti-misoperation circuit can be with
Detect, so as to control corresponding controlling switch not close.
Referring to Fig. 4, the Insulation Resistance of Transformer test is additionally provided with Anti-misoperation circuit, the anti-error behaviour with training module
Making circuit includes controller, and the controller is used to gather respectively between high-pressure side binding post and low-pressure side binding post, is low
Press between side terminal and ground terminal, the input voltage between high-pressure side binding post and ground terminal, and respectively with it is right
The setting value answered is compared, and when the input voltage of collection is more than setting value, controls Insulation Resistance of Transformer test real training
Corresponding controlling switch in module can not close, and prevent the measurement of corresponding insulaion resistance from being normally carried out, and output alarm signal
Carry out alarm.
Between the high-pressure side binding post and low-pressure side binding post, between low-pressure side binding post and ground terminal,
Bleeder circuit is connected between high-pressure side binding post and ground terminal.Preferably, each bleeder circuit passes through controlling switch
Be connected between high-pressure side binding post and low-pressure side binding post, between low-pressure side binding post and ground terminal, it is high
Press between side terminal and ground terminal.The partial pressure output end of each bleeder circuit connects with the input of AD conversion module respectively
Connect, the AD conversion module is used to gather the voltage after each bleeder circuit partial pressure respectively, and is converted into data signal and passes to control
Device processed, the controller are used for by the data signal of AD conversion module transmission compared with setting value, when AD conversion module passes
When the data signal passed is more than setting value, control the corresponding controlling switch in Insulation Resistance of Transformer test training module can not
Closure, prevents the measurement of corresponding insulaion resistance from being normally carried out, and output alarm signal carries out alarm.
Referring to Fig. 4, Insulation Resistance of Transformer test is additionally provided with Anti-misoperation circuit, the anti-misoperation electricity with training module
Road includes three bleeder circuits, and one end of the first bleeder circuit passes through relay K16 normally opened contact and high-pressure side A binding posts
Connection, the other end of the first bleeder circuit are connected by relay K16 normally opened contact with ground terminal.First bleeder circuit
The first input end of partial pressure output end and AD conversion module connects.One end of second bleeder circuit is normally opened by relay K17's
Contact is connected with high-pressure side A binding posts, the normally opened contact and low-pressure side that the other end of the second bleeder circuit passes through relay K17
A binding posts connect.The partial pressure output end of second bleeder circuit and the second input of AD conversion module connect.3rd partial pressure electricity
The one end on road is connected by relay K18 normally opened contact with low-pressure side a binding posts, and the other end of the 3rd bleeder circuit passes through
Relay K18 normally opened contact is connected with ground terminal.The partial pressure output end of 3rd bleeder circuit and the 3rd of AD conversion module the
Input connects.When the data signal of AD conversion module transmission is more than setting value, the test of control Insulation Resistance of Transformer is real
Relay K1, K2, K3 in instruction module can not be closed, and prevent the measurement of corresponding insulaion resistance from being normally carried out, and export alarm
Signal carries out alarm.Relay K16 coil, relay K17 coil, relay K18 one end of coil are grounded,
Relay K16 coil, relay K17 coil, relay K18 coil the other end output end with controller respectively
OUTPUT9, OUTPUT10, OUTPUT11 are electrically connected.Controller can distinguish control relay K16 coil, relay K17
Coil, relay K18 coil energization or power-off.Each bleeder circuit is made up of two resistance connected, or by a change
Hinder device composition.
When measurement height is to low insulation resistance, relay K17 closures；When measuring high insulation against ground resistance, relay K16
Closure；When measuring low insulation against ground resistance, relay K18 closures.Corresponding Anti-misoperation circuit path.
Because the input voltage of a/d converter can only be between -5.12V~+5.12V, resistance R1 selects with resistance R2 sizes
For 1：1000 and selection high-tension resistive, such as R1=1 M, the M of R2=1000, then obtained according to series connection voltage division formulas：Uin=U
Megameter ×.As U megameters=± 5000V, Uin ≈ ± 5.00V；As U megameters=± 2500V, Uin ≈
±2.50V；As U megameters=± 500V, Uin ≈ ± 0.50V.
Analog signal is switched into data signal from a/d converter, for example with ADC0809 conversion modules.The module
" 0V " is defaulted as with reference to negative voltage, need to first pass through program will be adjusted to " -5.12V " with reference to negative voltage（Satisfy the requirements）.The module turns
Changing chip has the acquisition time port IN0-IN7 of 8 tunnel analog signals, there is 8 tunnels simulation gating switch and corresponding passage in piece
Address latch decoding circuit, its conversion time are 100 μ s or so.According to address latch and decoding circuit to ADDRO (A),
3 ADDR1 (B), ADDR2 (C) address bits are latched and decoded, and it decodes output and is used for channel selecting, and its transformation result is led to
The storage of ternary output latch, output are crossed, therefore directly can be connected with system data bus.Channel selecting table is as follows：
Known by channel selecting table, 3 address bits corresponding to the collection port IN0-IN2 of the design are respectively：000,001 and 010.
Converter connects single-chip microcomputer, by the digital data transmission of conversion into single-chip microcomputer, reaches voltage acquisition output purpose.Pass through journey again
Sequence control single chip computer is handled data, and the break-make of control circuit relay.
Analog quantity after input voltage Uin is handled compared with reference quantity is converted into representing discrete letter with binary numeral
Number.The greatest measure that converter can quantify is 2^8=256 unit, range use -5.12V~+5.12V, then full scale
Voltage divided by maximum quantization unit just obtain analog voltage corresponding to a quantization unit, and Δ U=（5.12-（-5.12））V÷256
=0.04V.So, when input voltage Uin is+5.00V, corresponding decimal number is (5.00- (- 5.12)) ÷ 0.04=253,
Corresponding binary digit is 11111100.Similarly, when output voltage Uin is -5.00V, corresponding decimal number for (-
5.00- (- 5.12)) ÷ 0.04=3, corresponding binary system is 00000011；When output voltage Uin is+2.50V, corresponding binary system
For 00111110；When output voltage Uin is -2.50V, corresponding binary system is 01000001；When output voltage Uin is+0.50V
When, corresponding binary system is 01110001；When output voltage Uin is 0.99V, corresponding binary system is 10001110.Certainly, use
Manual megohmmeter spread of voltage, error are existing for affirmative, but its maximum voltage is not over megameter range.
After input voltage, it is delayed certain time, data signal is less than binary number corresponding to circuit maximum working voltage
During word, disconnected by relay K16, K17, K18 of programme-control Anti-misoperation circuit, the relay of insulation resistance test circuit
K1, K2, K3 are closed, and now can normally measure insulaion resistance, after the completion of experiment, the relay K1 of insulation resistance test circuit,
K2, K3 disconnect, relay K16, K17, K18 closure of Anti-misoperation circuit.When data signal is more than circuit maximum working voltage
It during corresponding binary digit, can not be closed, and alarmed by programme-control K1, K2, K3, can used existing any applicable
Type of alarm, such as display screen, acousto-optic.
The transformer capacity test is born including volume test with training module with resistive load, volume test with capacitive
Carry, the one or more in volume test inductive load, each volume test is connected respectively with resistive load by controlling switch
Between each high-pressure side binding post, each volume test is connected to each high-pressure side with capacitive load by controlling switch
Between binding post, each volume test with inductive load by controlling switch be connected to each high-pressure side binding post it
Between, transformer capacity test is electrically connected with the controller with each controlling switch of training module, and the controller is used for according to behaviour
The command signal output control signal of work person, control the closure or disconnected of each controlling switch of transformer capacity test training module
Open, realize the volume emulation of transformer.It is arranged on volume test capacitive load between two high-pressure side binding posts, capacity
Resistive load serial or parallel connection is used in test, is arranged on the volume test inductive load between two high-pressure side binding posts, is held
Measure resistive load serial or parallel connection on probation, be arranged on volume test inductive load between two high-pressure side binding posts,
Volume test capacitive load serial or parallel connection, any connection, forms various combinations.Be arranged on two high-pressure side binding posts it
Between volume test resistive load, volume test inductive load, volume test capacitive load can be with three kinds of series connection, can be with
Three kinds of parallel connections, can two kinds be in series with another parallel connection, can also be connected with another kind after two kinds of parallel connections etc..
Referring to Fig. 5, transformer capacity test is with a kind of structure of training module：The transformer capacity test real training
Module includes volume test resistive load and volume test capacitive load, is arranged between two high-pressure side binding posts
Volume test capacitive load, volume test are in parallel with resistive load, volume test resistive load is held with volume test
Property load form different combination access loops, correspond to the transformer of simulation different capabilities respectively.Using capacitive load with it is resistive
Load in series or analogue transformer capacity in parallel, precision is high after tested, and can simulate more different appearances by controlling switch
The transformer of amount, it is applied widely, it is easy to design circuit, small volume, cost be low and stable performance.
In order to realize a variety of volume emulations of transformer, the transformer capacity test includes more pool-sizes with training module
Test resistive load, included per pool-size test with resistive load between high-pressure side A binding posts and high-pressure side C binding posts
The first volume test resistive load, and the second capacity between high-pressure side B binding posts and high-pressure side C binding posts surveys
The 3rd volume test resistive load on probation between resistive load and high-pressure side A binding posts and high-pressure side B binding posts.Institute
The one end for stating the first volume test resistive load electrically connects with node A2, the first volume test resistive load it is another
End electrically connects with node C2, and one end of the second volume test resistive load electrically connects with node B2, second capacity
The other end of test resistive load electrically connects with node C2, one end and the node A2 of the 3rd volume test resistive load
Electrical connection, the other end of the 3rd volume test resistive load electrically connect with node B2, and node A2 passes through relay K5's
Normally opened contact is connected with node A1, and node B2 is connected by relay K26 normally opened contact with node B1, and node C2 passes through relay
Device K12 normally opened contact is connected with node C1.Relay K5 coil, relay K26 coil, relay K12 coil
One end is grounded, and relay K5 coil, relay K26 coil, the relay K12 other end of coil pass through relay
K19 normally opened contact and DC voltage（Such as 5V）Electrical connection, one end of relay K19 coil and DC voltage（Such as 5V）It is electrically connected
Connect, the other end of relay K19 coil electrically connects with the output end of controller.Controller can be with control relay K19 coils
Energization or power-off, and whether the energization of relay K19 coils has indicator lamp prompting.
Referring to Fig. 5, the transformer capacity test also includes volume test capacitive load, each high pressure with training module
At least one set of volume test capacitive load, two high pressure side terminals are respectively connected with by controlling switch between side terminal
Volume test capacitive load, volume test resistive load serial or parallel connection between son, make volume test resistive load
The combinations different with capacitive load composition from volume test access loop, correspond to the transformer of simulation different capabilities respectively.In order to
A variety of volume emulations of transformer are realized, the transformer capacity test is born with training module including multigroup volume test with capacitive
Carry, surveyed per pool-size test with capacitive load including the first capacity between high-pressure side A binding posts and high-pressure side C binding posts
Capacitive load on probation, and the second volume test capacitive load between high-pressure side B binding posts and high-pressure side C binding posts
The 3rd volume test capacitive load between high-pressure side A binding posts and high-pressure side B binding posts.First capacity is surveyed
One end of capacitive load on probation electrically connects with node A3, the other end and the node C3 electricity of the first volume test capacitive load
Connection, one end of the second volume test capacitive load are electrically connected with node B3, and second volume test is born with capacitive
The other end of load electrically connects with node C3, and one end of the 3rd volume test capacitive load electrically connects with node A3, described
The other end of 3rd volume test capacitive load electrically connects with node B3, node A3 by relay K49 normally opened contact with
Node A1 connections, node B3 are connected by relay K70 normally opened contact with node B1, and node C3 is normal by relay K56's
Contact is opened to be connected with node C1.Relay K49 coil, relay K70 coil, relay K56 one end of coil connect
Ground, relay K49 coil, relay K70 coil, the relay K56 other end of coil pass through the normal of relay K63
Open contact and DC voltage（Such as 5V）Electrical connection, one end of relay K63 coil and DC voltage（Such as 5V）Electrical connection, relay
The other end of device K63 coil electrically connects with the output end of controller.Controller can with the energization of control relay K63 coils or
Power-off, and whether the energization of relay K63 coils has indicator lamp prompting.
Referring to Fig. 5, node A1, B1, C1 directly can be connected with high-pressure side A, B, C binding post respectively.Preferably, node
Connected between A1 and high-pressure side A binding posts by relay J5 normally opened contact, between node B1 and high-pressure side B binding posts
Connected by relay J7 normally opened contact, pass through relay J6 normally opened contact between node C1 and high-pressure side C binding posts
Connection, relay J5 coil, relay J7 coil, relay J6 one end of coil are grounded, relay J5 coil,
Relay J7 coil, the other end of relay J6 coil pass through relay K90 normally opened contact and DC voltage（Such as
5V）Electrical connection, one end of relay K90 coil and DC voltage（Such as 5V）Electrical connection, the other end of relay K90 coil
Electrically connected with the output end of controller.Controller can be with the energization or power-off of control relay K90 coils, and relay K90 lines
Whether the energization of circle has indicator lamp prompting.The both ends of the coil of relay are parallel with diode, the plus earth of the diode.
Each capacitive load uses capacitor, and resistive load uses resistance.
Power transformers are made up of coil windings, but coil can be divided into resistance in analog circuit and be formed with reactance.
In transformer capacity test, we respectively dock the a/b/c/N binding posts of the low-pressure side of transformer（Short circuit）, allow them
Loop is formed, on high-tension side A/B/C three-phases are being docked by transformer capacity tester, one is provided by transformer capacity tester
Voltage, it is possible to which it is how many to have transformer capacity tester to test out the capacity of this transformer.
Analogue transformer simulation volume test of the present invention uses resistance and capacitor combination, simulates the volume of power transformer respectively
Fixed number evidence, as K5, K12, K19, K26, K49, K56, K63, K70, K90 are relay in Fig. 5, R5, R12, R19 are resistance,
CD5, CD12, CD19 are capacitor.When analogue transformer volume test, when operating personnel select volume test, program life
Make K19, K63, K90 close, while control the relay of other combined capacity circuits not close.Now K5, K12, K26,
K49, K56, K70, J5, J6, J7 are closed, and transformer capacity tester access high-pressure side is then carried out volume test.K90 work
With being the K90 off-states when analogue transformer carries out energizing test, prevent voltage enters from burning out test board.
The KM1 when carrying out capacity and insulation and loss test（Fig. 1）It can not close.
The combination of electric capacity and resistance has some groups in transformer capacity test training module, corresponds to the kind of simulation not respectively
With the transformer of capacity.
Referring to Fig. 6, transformer capacity test is with another structure of training module：The transformer capacity test is real
Instruction module includes volume test resistive load and volume test inductive load, is arranged between two high-pressure side binding posts
Volume test connected with inductive load, volume test with resistive load.The transformer capacity test is included with training module
One or more groups of volume test inductive loads, include the first volume test with inductive load per pool-size test and born with perception
Carry, the second volume test is with inductive load, the 3rd volume test inductive load.
In order to realize a variety of volume emulations of transformer, the transformer capacity test includes more pool-sizes with training module
Test resistive load, include the first volume test resistive load, the second volume test with resistive load per pool-size test
With resistive load, the 3rd volume test resistive load.Each high-pressure side binding post is connected with node A4, B4, C4 respectively.It is excellent
Selection of land, relay J25 normally opened contact is provided between node A4, B4, C4 and each high-pressure side binding post.Node A4, B4, C4
Respectively with the first volume test resistive load, the second volume test resistive load, the 3rd volume test resistive load
One end connects, and the first volume test is with resistive load, the second volume test with resistive load, the 3rd volume test resistive load
The other end be connected respectively with node A5, B5, C5 by relay J26 normally opened contact.Node A5, B5, C5 are respectively with first
One end connection of volume test inductive load, the second volume test inductive load, the 3rd volume test inductive load, the
One volume test inductive load, the second volume test inductive load, the other end point of the 3rd volume test inductive load
It is not connected with low-pressure side a, b, c binding post.Needed the mutual short circuit of low-pressure side a, b, c binding post during test.Preferably,
One volume test inductive load, the second volume test inductive load, the 3rd volume test with inductive load respectively with it is each
Relay J29 normally opened contact is provided between low-pressure side binding post.The present apparatus is in volume test, each low pressure side terminal
Need to be connected with wire between son, make to form loop between each high-pressure side binding post.Each relay passes through controller respectively
Control.Preferably, resistive load is resistance, and inductive load is transformer.
Referring to Fig. 7, the transformer voltage ratio module for testing includes bleeder circuit, and high-pressure side A, B, C binding post and N connect
Bleeder circuit is respectively connected with by controlling switch between line terminals, the partial pressure output end of each bleeder circuit passes through controlling switch point
Dui Ying be connected with low-pressure side a, b, c binding post, each controlling switch of transformer voltage ratio module for testing respectively with controller
Electrical connection, the controller are used for the command signal output control signal according to operator, control transformer voltage ratio test mould
The closure of each controlling switch of block or disconnection.
In order to realize that a variety of no-load voltage ratios of transformer are simulated, the transformer voltage ratio module for testing includes multicomponent piezoelectricity
Road, the intrinsic standoff ratio per component volt circuit is different, includes per component volt circuit between high-pressure side A binding posts and N binding posts
The first bleeder circuit, and the second bleeder circuit between high-pressure side B binding posts and N binding posts and high-pressure side C wiring
The 3rd bleeder circuit between terminal and N binding posts.Multigroup bleeder circuit is arranged in parallel in high-pressure side binding post and N wiring
Between terminal, switched between each group bleeder circuit by controlling switch.Each bleeder circuit is made up of two resistance connected, or
It is made up of a rheostat.Rheostat can use the rheostat of regulation intrinsic standoff ratio manually, can also use and pass through control
Device can adjust the rheostat of intrinsic standoff ratio, such as magnetic control rheostat.Divide when each bleeder circuit uses by the way that controller is adjustable
During the rheostat of pressure ratio, only a component volt circuit need to be set between high-pressure side binding post and N binding posts.
Referring to Fig. 7, the transformer voltage ratio module for testing of the present embodiment is provided with three component volt circuits.The of the present embodiment
First bleeder circuit of one component volt circuit, the second bleeder circuit, one end of the 3rd bleeder circuit pass through the normally opened of relay J3
Contact is connected with node A7, B7, C7 respectively, the first bleeder circuit, the second bleeder circuit, the 3rd the partial pressure electricity per component volt circuit
The other end on road is connected with N binding posts.The first bleeder circuit, the second bleeder circuit, the 3rd partial pressure electricity per component volt circuit
The partial pressure output end on road is connected with node a7, b7, c7 respectively by relay J6 normally opened contact.The of second component volt circuit
One bleeder circuit, the second bleeder circuit, the 3rd bleeder circuit one end by relay J4 normally opened contact respectively with node A7,
B7, C7 are connected, per the first bleeder circuit, the second bleeder circuit, the other end of the 3rd bleeder circuit and the N wiring of component volt circuit
Terminal connects.The first bleeder circuit, the second bleeder circuit, the partial pressure output end of the 3rd bleeder circuit per component volt circuit pass through
Relay J7 normally opened contact is connected with node a7, b7, c7 respectively.First bleeder circuit of third component volt circuit, second point
Volt circuit, one end of the 3rd bleeder circuit are connected with node A7, B7, C7 respectively by relay J5 normally opened contact, per component
The first bleeder circuit, the second bleeder circuit, the other end of the 3rd bleeder circuit of volt circuit are connected with N binding posts.Per component
First bleeder circuit of volt circuit, the second bleeder circuit, the partial pressure output end of the 3rd bleeder circuit pass through the normally opened of relay J8
Contact is connected with node a7, b7, c7 respectively.Node A7, B7, C7 are connected with high-pressure side A, B, C binding post respectively.Preferably,
Relay J3 normally opened contact is provided between node A7, B7, C7 and high-pressure side A, B, C binding post.Node a7, b7, c7 distinguish
It is connected with low-pressure side a, b, c binding post.Preferably, between node a7, b7, c7 and low-pressure side a, b, c binding post be provided with after
Electrical equipment J9 normally opened contact.The present invention can control the energization of the coil of each relay, power-off by controller, can also pass through
Shunting switch SB1 on transformer controls the energization of the coil of each relay, power-off, and control no-load voltage ratio opens test.
The present embodiment simulates 3 kinds of no-load voltage ratio tests of transformer, and the first is to open shunting switch SB1-0 shelves, controller control
System automatically turns on J2/J3/J6/J9, and the 2nd kind is to open shunting switch SB1-2 shelves, and controller control automatically turns on J2/J4/J7/
J9, the 3rd kind is to open shunting switch SB1-0 shelves, and controller control automatically turns on J2/J5/J8/J9.
Referring to Fig. 8, the DCR of Transformer module for testing includes D.C. resistance test resistive load, Ge Gegao
At least one set of D.C. resistance test resistive load, each low-pressure side are respectively connected with by controlling switch between pressure side terminal
At least one set of D.C. resistance test resistive load, DCR of Transformer are respectively connected with by controlling switch between binding post
Each controlling switch of module for testing is electrically connected with the controller respectively, and the controller is defeated for the command signal according to operator
Go out control signal, control closure or the disconnection of each controlling switch of transformer DCR of Transformer module for testing, realize and become
Resistance simulation between each winding of depressor.
Referring to Fig. 8, the present embodiment DCR of Transformer module for testing includes three groups of high-pressure side D.C. resistance tests and used
Resistive load and three groups of low-pressure side D.C. resistance test resistive loads.First group of high-pressure side D.C. resistance test resistive load
The first high-pressure side D.C. resistance test resistive load, the second high-pressure side D.C. resistance test resistive load, the 3rd high pressure
One end of side D.C. resistance test resistive load is connected with node A8, B8, C8 respectively by relay J18 normally opened contact,
The first high-pressure side D.C. resistance test resistive load, the second high pressure of first group of high-pressure side D.C. resistance test resistive load
Side D.C. resistance test resistive load, the other end of the 3rd high-pressure side D.C. resistance test resistive load connect with node A9
Connect.First high-pressure side D.C. resistance test resistive load of second group of high-pressure side D.C. resistance test resistive load, second
High-pressure side D.C. resistance test resistive load, one end of the 3rd high-pressure side D.C. resistance test resistive load pass through relay
J19 normally opened contact is connected with node A8, B8, C8 respectively, and the first of second group of high-pressure side D.C. resistance test resistive load
High-pressure side D.C. resistance test resistive load, the second high-pressure side D.C. resistance test resistive load, the 3rd high-pressure side direct current
The other end of resistance test resistive load is connected with node A9.3rd group of high-pressure side D.C. resistance test resistive load
First high-pressure side D.C. resistance test resistive load, the second high-pressure side D.C. resistance test resistive load, the 3rd high-pressure side
One end of D.C. resistance test resistive load is connected with node A8, B8, C8 respectively by relay J20 normally opened contact, the
First high-pressure side D.C. resistance test resistive load of three groups of high-pressure side D.C. resistance test resistive loads, the second high-pressure side
D.C. resistance test resistive load, the other end of the 3rd high-pressure side D.C. resistance test resistive load connect with node A9
Connect.Node A8, B8, C8 are connected with high-pressure side A, B, C binding post respectively.Preferably, node A8, B8, C8 and high-pressure side A, B, C
Relay J17 normally opened contact is provided between binding post.
The first low-pressure side D.C. resistance test resistive load of first group of low-pressure side D.C. resistance test resistive load,
Second low-pressure side D.C. resistance test resistive load, the 3rd low-pressure side D.C. resistance test resistive load one end by after
Electrical equipment J21 normally opened contact is connected with node a8, b8, c8 respectively, first group of low-pressure side D.C. resistance test resistive load
First low-pressure side D.C. resistance test resistive load, the second low-pressure side D.C. resistance test resistive load, the 3rd low-pressure side
The other end of D.C. resistance test resistive load is connected with N binding posts.Second group of low-pressure side D.C. resistance test resistance
Property the first low-pressure side D.C. resistance test resistive load of load, the second low-pressure side D.C. resistance test resistive load, the
One end of three low-pressure side D.C. resistance test resistive loads by relay J22 normally opened contact respectively with node a8, b8, c8
Connection, the first low-pressure side D.C. resistance of second group of low-pressure side D.C. resistance test resistive load, which is tested, uses resistive load, the
Two low-pressure side D.C. resistances test resistive load, the 3rd low-pressure side D.C. resistance test resistive load the other end and N
Binding post connects.First low-pressure side D.C. resistance of the 3rd group of low-pressure side D.C. resistance test resistive load is tested with resistive
Load, the second low-pressure side D.C. resistance test resistive load, one end of the 3rd low-pressure side D.C. resistance test resistive load
It is connected respectively with node a8, b8, c8 by relay J23 normally opened contact, the 3rd group of low-pressure side D.C. resistance is tested with resistive
The first low-pressure side D.C. resistance test resistive load of load, the second low-pressure side D.C. resistance are tested with resistive load, the 3rd
The other end of low-pressure side D.C. resistance test resistive load is connected with N binding posts.Node a8, b8, c8 respectively with low pressure
Side a, b, c binding post connection.Preferably, relay J24 is provided between node a8, b8, c8 and low-pressure side a, b, c binding post
Normally opened contact.
The method of testing of the present embodiment D.C. resistance is：D.C. resistance is the resistance between each winding of measurement, such as measures high pressure
Resistance between each winding in side opens J17, J18 either J17, J19 or J17, J20, draws R（AB）、R（BC）、R（AC）Value,
Here it is the test of high-pressure side D.C. resistance, similarly measure the resistance between each winding of low-pressure side open J21, J24 or J22, J24 or
Person J23, J24, draw Rab, Rac, Rbc, Ran, Rbn, Rcn, here it is the test of low-pressure side D.C. resistance.
Referring to Fig. 9, transformer loss test training module includes power supply change-over device and controllable negative of power
Carry and put, the input of the power supply change-over device is connected with high-pressure side binding post, the output end of the power supply change-over device
The load device controllable with power is connected, and the power supply change-over device is used to high voltage becoming low-voltage and changes alternating voltage
For the DC voltage load device power supply controllable to power, the controllable load device of the power is electrically connected with the controller, described
Controller is used for the command signal output control signal according to operator, adjusts the power of load device, the damage of analogue transformer
Wasted work rate.The power supply change-over device can use transformer and rectification module, can also use Switching Power Supply etc..
The training module of transformer loss test described in the present embodiment includes transformer T1, transformer T2, transformer T3, whole
Flow module ZLQ1, rectification module ZLQ2, rectification module ZLQ3, transformer T1 primary side one end and high-pressure side A binding posts connect
Connect, transformer T2 primary side one end is connected with high-pressure side B binding posts, and transformer T3 primary side one end and high-pressure side C connect
Line terminals are connected, and transformer T1, T2, T3 the primary side other end are connected with N binding posts, and the two of transformer T1 secondary side
End is connected with rectification module ZLQ1 two inputs respectively, the both ends of transformer T2 secondary side respectively with rectification module ZLQ2
Two inputs connection, the both ends of transformer T3 secondary side are connected with rectification module ZLQ3 two inputs respectively, whole
Electric capacity C10 is in series between flow module ZLQ1 two output ends, electricity is in series between rectification module ZLQ2 two output ends
Hold C2, electric capacity C3 be in series between rectification module ZLQ3 two output ends, after electric capacity C1, electric capacity C2, electric capacity C2 series connection with work(
Two inputs connection of the controllable load device of rate.The rectification module uses rectifier bridge.
The controllable load device of the power includes DC speed regulator and loss test resistive load, the DC speed regulation
The input of device and the output end of rectification module connect, and each loss test resistive load passes through each controlling switch and DC speed regulation
The adjustable side connection of device, the output end of the DC speed regulator are connected with a resistive load.
Test philosophy：What it is because of transformer loss test addition is 380V three phase mains, and voltage is reduced to by transformer
In the range of 0-50V, entering over commutation bridge AC-DC, RI is the resistance of certain resistance power, adjusts DC speed regulator, I
Using controller control DC speed regulator（KA+R is combined）, power is changed to simulate the loss work(of power transformer
Rate.
Energizing test transformer, the examination that is powered are set between the high-pressure side binding post and low-pressure side binding post
Test and be connected to transformer by controlling switch between high-pressure side binding post and low-pressure side binding post, the controlling switch with
Controller electrically connects, and the controller is used for the command signal output control signal according to operator, controls the controlling switch
Closure disconnects, and carries out energizing test.The controlling switch uses contactor KM1.Preferably, energizing test with transformer use every
From transformer, and it is the transformer that three lines become four lines.After controlling each test to be disconnected with corresponding binding post with training module,
It can just control KM1 to close, carry out energizing test.Portable casing is such as used, then is typically not provided with energizing test transformer,
Energizing test can not be carried out, capacity, insulation, absorptance, loss test may only be carried out.Such as using sandwich type element is emulated, then both
Capacity, insulation, absorptance, loss test can be carried out, energization test can also be carried out.
Present invention additionally comprises transformer to emulate housing, and each test is arranged at change with training module, controller, power module
In depressor emulation housing.The emulation sandwich type element uses real transformer housing.The high-pressure side binding post and low-pressure side wiring
Terminal corresponds to respectively to be electrically connected with the corresponding insulator on emulation sandwich type element.Certainly, each test training module, controller,
Power module can also be not arranged in transformer emulation housing, but is additionally provided in a single cabinet, and will be become
Depressor emulation housing is fixed on the cabinet.
Each test training module, controller, power module can also be arranged in a portable casing, described portable
Formula casing be provided with high-pressure side A, B, C binding post, low-pressure side a, b, c, N binding post, ground terminal, power supply terminal and
Communication connection terminal, touch-screen etc..
Protection circuit, the protection electricity are provided between the power supply terminal and power supply binding post of this analogue transformer
Road includes breaker, leakage guarantor, the second contactor KM2 being arranged between power supply terminal and binding post of powering.Power supply connects
After line terminals are powered, the first indicator lamp is bright, close circuit breaker, and the second indicator lamp is bright, and relay J1 coil electricity, relay
J1 normally-closed contact disconnects, and the first indicator lamp goes out.Leakage, which is protected, opens, and the 3rd indicator lamp is bright, and second contactor KM2 coil leads to
Electricity, second contactor KM2 main contacts closure, power supply binding post obtain it is electric, export give power module power supply, now, second connects
Tentaculum KM2 normally-closed contact disconnects, and the second indicator lamp goes out.Power supply terminal and power supply binding post between be provided with voltmeter and
Ammeter.
This analogue transformer can see the external structure of real transformer, have transformer function to carry out again conventional
Electrical test, capacity, absorptance, insulaion resistance, no-load voltage ratio, D.C. resistance, loss test are such as carried out, and use electronics and electrician
Mode is that electronic circuit or module substitute iron core and coil in real transformer etc., to realize the mould of transformer various functions
Intend, and an analogue transformer can carry out the simulation such as different capabilities, no-load voltage ratio, for teaching, training, have wide adaptation range, disappear
The power of consumption is small, is the preferable choosing as teaching operation training such as electric power teaching, training demonstration the features such as being actually consistent with scene
Select.The structure and general idea of each module for testing of the present invention are equally applicable to single-phase transformer.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, it is clear that those skilled in the art
Member can carry out various changes and modification without departing from the spirit and scope of the present invention to the present invention.So, if the present invention
These modifications and variations belong within the scope of the claims in the present invention and its equivalent technologies, then the present invention is also intended to include these
Including change and modification.
Claims (10)
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| CN201710459085.3A CN107356828B (en) | 2017-06-16 | 2017-06-16 | Transformer transformation ratio simulation training device |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089726A (en) * | 1993-01-09 | 1994-07-20 | 黄立 | A kind of transformer testing instrument |
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| CN1089726A (en) * | 1993-01-09 | 1994-07-20 | 黄立 | A kind of transformer testing instrument |
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