CN107300648A

CN107300648A - Insulation Resistance of Transformer, absorptance simulation and training device

Info

Publication number: CN107300648A
Application number: CN201710458879.8A
Authority: CN
Inventors: 青志明; 王�义; 周飞; 章陈勇; 傅鹏宇
Original assignee: Chongqing Gold Diansheng Technology Co Ltd; Technology & Skill Training Center Of Chongqing Electric Power Company State Grid; State Grid Corp of China SGCC
Current assignee: Chongqing Gold Diansheng Technology Co Ltd; Technology & Skill Training Center Of Chongqing Electric Power Company State Grid; State Grid Corp of China SGCC
Priority date: 2017-06-16
Filing date: 2017-06-16
Publication date: 2017-10-27
Anticipated expiration: 2037-06-16
Also published as: CN107300648B

Abstract

The invention discloses a kind of Insulation Resistance of Transformer, absorptance simulation and training device, including high-pressure side binding post, low-pressure side binding post, ground terminal, megger test resistive load is connected with by controlling switch between the high-pressure side binding post and low-pressure side binding post, megger test resistive load is connected with by controlling switch between high-pressure side binding post and ground terminal, megger test resistive load is connected with by controlling switch between low-pressure side binding post and ground terminal, each controlling switch is electrically connected with the controller respectively, controller is used for the command signal output control signal according to operator, control closure or the disconnection of each controlling switch.It uses electronic circuit or module to substitute inside transformer structure, come realize Insulation Resistance of Transformer, absorptance function simulation, for teaching, training, the power with wide adaptation range, consumption is small, the features such as being actually consistent with scene.

Description

Insulation Resistance of Transformer, absorptance simulation and training device

Technical field

The present invention relates to a kind of actual training device, more particularly to a kind of Insulation Resistance of Transformer, absorptance 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 giveed training, and giveed training using simulation model using simulation model, can only understood The structure of transformer, and detection to transformer, experiment and quality judge 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, and this is existed for entering during line transformer functional test training Great potential safety hazard.Applicant designs a kind of analogue transformer to solve the above problems, and it can see transformer External structure, there is transformer function again, you can carry out conventional electrical test, it is therefore desirable to which one kind is using electronics and electrician's mode To realize Insulation Resistance of Transformer, the Insulation Resistance of Transformer of absorptance functional simulation, absorptance simulation and training device.

The content of the invention

The purpose of the present invention is that there is provided a kind of Insulation Resistance of Transformer, absorptance mould for the corresponding deficiency of prior art Intend actual training device, it uses electronics to substitute inside transformer structure with electrician's mode i.e. electronic circuit or module, to realize transformation The simulation of device insulaion resistance, absorptance function, for teaching, training, the power with wide adaptation range, consumption is small, real with scene The features such as border is consistent, is the preferable selection as teaching operation training such as electric power teaching, training demonstration.

The purpose of the present invention is realized using following proposal：A kind of Insulation Resistance of Transformer, absorptance simulation and training dress Put, including high-pressure side binding post, low-pressure side binding post, ground terminal, the high-pressure side binding post and low-pressure side wiring Megger test resistive load, the high-pressure side binding post and ground terminal are connected with by controlling switch between terminal Between megger test resistive load is connected with by controlling switch, between the low-pressure side binding post and ground terminal Megger test resistive load is connected with by controlling switch, each controlling switch is electrically connected with the controller respectively, the control Device processed is used for the command signal output control signal according to operator, controls closure or the disconnection of each controlling switch.

Megger test is parallel with megger test capacitive load with the two ends of resistive load.

Each megger test uses resistance with resistive load, and each megger test uses capacitor with capacitive load.

Insulation Resistance of Transformer, absorptance simulation and training device include three groups of megger test resistive loads, first The two ends of group megger test resistive load pass through controlling switch and high-pressure side binding post, low-pressure side binding post respectively Electrical connection, the two ends of second group of megger test resistive load respectively by controlling switch and high-pressure side binding post, connect Ground terminal electrical connection, the two ends of the 3rd group of megger test resistive load pass through controlling switch and low pressure side terminal respectively Son, ground terminal electrical connection, every group of megger test with resistive load include a megger test resistive load or Multiple megger tests resistance in multiple megger test resistive loads, every group of megger test resistive load Property load it is in parallel, and multiple megger test resistive loads in every group of megger test resistive load pass through respectively Loop where controlling switch access, makes the load resistance in each loop of controlling switch control access.

First group of megger test is made up of with resistive load megger test with resistive load HV-R1, second group Megger test is made up of with resistive load megger test with resistive load HV-R3, and the 3rd group of megger test is used Resistive load is made up of megger test with resistive load HV-R5, and megger test resistive load HV-R1 one end leads to The normally opened contact for crossing relay K4 is connected with node A6, and megger test passes through relay with the resistive load HV-R1 other end Device K5 normally opened contact is connected with node a6, and megger test is with capacitive load CD2 and megger test resistive load HV-R1 is in parallel, normally opened contact and node A6 that the megger test passes through relay K6 with resistive load HV-R3 one end Connection, megger test is connected with the resistive load HV-R3 other end by relay K7 normally opened contact with node PE6, Megger test is in parallel with megger test resistive load HV-R3 with capacitive load CD16, megger test resistance Property load HV-R5 one end be connected by relay K8 normally opened contact with node a6, megger test resistive load HV- The R5 other end is connected by relay K9 normally opened contact with node PE6, and megger test is with capacitive load CD35 and absolutely Edge resistance test is in parallel with resistive load HV-R5, and relay K4, one end of relay K5 coil are grounded, relay K4, after The other end of electrical equipment K5 coil is electrically connected with the controller, and relay K6, one end of relay K7 coil are grounded, relay Device K6, the other end of relay K7 coil are electrically connected with the controller, and relay K8, one end of relay K9 coil connect Ground, relay K8, the other end of relay K9 coil are electrically connected with the controller, node A6, a6, PE6 respectively directly with height Side A binding posts, low-pressure side a binding posts, ground terminal connection are pressed, or is led between node A6 and high-pressure side A binding posts Relay K1 normally opened contact connection is crossed, is connected between node a6 and low-pressure side a binding posts by relay K2 normally opened contact Connect, connected between node PE6 and ground terminal by relay K3 normally opened contact, relay K1 coil, relay K2 Coil, one end of relay K3 coil are grounded, relay K1 coil, relay K2 coil, relay K3 coil The other end be electrically connected with the controller respectively.

The Insulation Resistance of Transformer, absorptance simulation and training device include two groups of megger test resistive loads, The two ends of first group of megger test resistive load pass through controlling switch and high-pressure side binding post, low-pressure side wiring respectively Terminal is electrically connected, and the two ends of second group of megger test resistive load pass through controlling switch and high pressure side terminal respectively Son, ground terminal electrical connection；Or first group of megger test is connected by controlling switch respectively with the two ends of resistive load Between high-pressure side binding post and low-pressure side binding post, the two ends of second group of megger test resistive load lead to respectively Controlling switch is crossed to be connected between low-pressure side binding post and ground terminal；Or first group of megger test resistive load Two ends be connected to respectively by controlling switch between high-pressure side binding post and ground terminal, second group of megger test is used The two ends of resistive load are connected between low-pressure side binding post and ground terminal by controlling switch respectively, every group of insulaion resistance Test includes a megger test resistive load or multiple megger test resistive loads, every group with resistive load Multiple megger tests in megger test resistive load are in parallel with resistive load, and every group of megger test is used Loop where multiple megger tests in resistive load are accessed by controlling switch respectively with resistive load, makes controlling switch The load resistance in each loop of control access.

First group of megger test includes multiple megger test resistive loads, second group of insulation with resistive load Resistance test includes multiple megger test resistive loads, first group of megger test resistive load with resistive load One end of each megger test resistive load be connected by the normally opened contact of relay with node A10, first group of insulation The other end of each megger test resistive load of resistance test resistive load is connected with node b10, second group of insulation Normally opened contact and node that one end of each megger test resistive load of resistance test resistive load passes through relay C10 connections, the other end and node of each megger test resistive load of second group of megger test resistive load PE10 connections, node A10 is connected by the normally opened contact of relay with high-pressure side binding post, and node C10 passes through relay Normally opened contact is connected with high-pressure side binding post, and node b10 is connected by the normally opened contact of relay with low-pressure side binding post, Node PE10 is connected by the normally opened contact of relay with ground terminal.

The Insulation Resistance of Transformer, absorptance simulation and training device are additionally provided with Anti-misoperation circuit, the anti-misoperation Circuit includes controller, and the controller for gathering between high-pressure side binding post and low-pressure side binding post respectively, low pressure Between side terminal and ground terminal, the input voltage between high-pressure side binding post and ground terminal, and respectively with it is corresponding Setting value be compared, when the input voltage of collection is more than setting value, control Insulation Resistance of Transformer, absorptance simulation are real Corresponding controlling switch in training apparatus can not be closed, and prevent the measurement of corresponding insulaion resistance from being normally carried out, and export alarm signal Number 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, each bleeder circuit is connected respectively by controlling switch Between high-pressure side binding post and low-pressure side binding post, between low-pressure side binding post and ground terminal, the wiring of high-pressure side Between terminal and ground terminal, the partial pressure output end of each bleeder circuit is connected with the input of AD conversion module respectively, the AD Modular converter passes to controller for gathering the voltage after each bleeder circuit partial pressure respectively, and being converted into data signal, described The data signal that controller is used to transmit AD conversion module is compared with setting value, the numeral letter transmitted when AD conversion module When number being more than setting value, control Insulation Resistance of Transformer, the corresponding controlling switch in absorptance simulation and training device can not be closed, Prevent the measurement of corresponding insulaion resistance from being normally carried out, and output alarm signal carries out alarm.

The controller is communicated with computer or Digiplex, the finger for receiving computer or Digiplex Signal is made, or, the controller is communicated with touch-screen, the command signal for receiving touch-screen.

Present invention has the advantage that：Insulation Resistance of Transformer, the absorptance simulation and training device of the present invention is using electricity It is sub to be electronic circuit or module to substitute internal structure such as iron core, coil etc. of real transformer with electrician's mode, realize transformation The simulation of device insulaion resistance, absorptance function, for teaching, training, test operation is using upper also as real transformer.Should Device have wide adaptation range, consumption power it is small, with scene be actually consistent the features such as, be electric power teaching, training demonstration etc. work For the preferable selection for operation training of imparting knowledge to students.

Because megameter model is different, such as：5000V, 2500V, 1000V, 500V etc. are by mistake higher using voltage to prevent Megameter, causes electric capacity in part of detecting circuit breakdown, and the present invention devises Anti-misoperation circuit, the Anti-misoperation circuit Including controller, the controller for gathering between high-pressure side binding post and low-pressure side binding post respectively, low pressure side joint Input voltage between line terminals and ground terminal, between high-pressure side binding post and ground terminal, and set respectively with corresponding Definite value is compared, when the input voltage of collection is more than setting value, in control Insulation Resistance of Transformer test training module Corresponding controlling switch can not close, prevent the measurement of corresponding insulaion resistance from being normally carried out, and output alarm signal is reported Alert prompting.

The Insulation Resistance of Transformer test of the present invention is applied to " analogue transformer " with actual training device so that simulation becomes The existing transformer profile of depressor, it can be seen that transformer external structure；There is transformer function again, you can carry out conventional electric examination Test, carry out skills training with " analogue transformer " of the present invention, training and teaching effect can be effectively improved, student is relatively easy to Grasp transformer device structure, principle and method of testing；The human and material resources and time cost in terms of educational training are saved, religion is improved Educate the comprehensive benefit of training.By training, employee is set to obtain consolidating and lifting, grasp related work in professional knowledge and technical ability Standardized work program, improve operating efficiency, the performance of enterprises, reduce accident generation.

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

Insulation Resistance of Transformer disclosed by the invention, absorptance simulation and training device can be arranged to an individually dress Put, it also has power module, controller, emulation transformer shell etc., only realizes insulaion resistance, absorptance functional simulation, It can be arranged on together with the actual training device of other each functional simulations in an emulation transformer shell, share power module, control Device processed, housing etc., collectively form an analogue transformer.

Referring to Fig. 1 to Fig. 9, present embodiment discloses a kind of analogue transformer, the analogue transformer includes high-pressure side wiring Terminal（A、B、C）, low-pressure side binding post（a、b、c、N）, ground terminal, controller, power module, transformer capacity test use Training module and Insulation Resistance of Transformer test training module, transformer loss test training module, transformer voltage ratio One or more in module for testing, DCR of Transformer module for testing.The power module is used to be whole device Power supply.Power module is used to 220V exchanges being converted into 24V DC voltages and 5V DC voltages.The controller of the present invention is used PLC control panels.Preferably, all controlling switches use relay in the present invention.Certainly the controlling switch of the present invention can also be adopted The switch that can be controlled by a controller with other.The present invention is by controller by controlling each test to be opened with the control in training module Close, so as to control the unlatching of each test training module and control each test training module to be connected with corresponding binding post Or disconnect, each test during the various tests of carry out is not interfere with each other with training module.The resistive load is the load with resistance Resistance is not limited only to, the capacitive load can use capacitor, and the inductive load can be using inductance or transformer etc..

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 of the analogue transformer can by way of existing line or wirelessly with computer Or other equipment such as Digiplex is communicated, operator sends command signal by computer or other equipment and passes through existing line Mode or wirelessly pass to the controller of analogue transformer.Certainly, analogue transformer can also set instruction input Device（Such as button, touch-screen）And suggestion device（Such as acousto-optic, can be display screen）, respectively with the control of analogue transformer Device is connected.By instruction inputting device input instruction signal, alarmed by suggestion device or display device or status display Deng.

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, controls 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 two 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 be able to can mitigate again 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 two 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 two ends of resistive load Between son and ground terminal；First group of megger test resistive load in two groups of megger test resistive loads Two 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 second group of megger test in resistive load with the two ends of 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 two 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 second group of megger test in resistive load with the two ends of 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, makes the load resistance in each loop of controlling switch control access.

Two groups of megger tests of the present embodiment are with first group of megger test resistive load in resistive load Two 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 two ends of resistive load Between side terminal and ground terminal.Every group of megger test resistive load includes multiple megger tests with resistive Load.The physical circuit of the Insulation Resistance of Transformer test training module of the present embodiment is as follows：First group of megger test Include megger test resistive load R1, R2, R3 with resistive load, second group of megger test is included with resistive load Megger test resistive load R4, R6, R8, megger test pass through relay J14's with resistive load R1 one end Normally opened contact is connected with node A10, and megger test is connected with the resistive load R1 other end with node b10.Insulaion resistance Test is connected with resistive load R4 one end by relay J14 normally opened contact with node C10, and megger test is with resistive The load R4 other end is connected with node PE10.Megger test passes through the normal of relay J13 with resistive load R2 one end Open contact to be connected with node A10, megger test is connected with the resistive load R2 other end with node b10.Insulaion resistance is surveyed Resistive load R6 on probation one end is connected by relay J13 normally opened contact with node C10, and megger test is born with resistive The other end for carrying R6 is connected with node PE10.Megger test passes through the normally opened of relay J12 with resistive load R3 one end Contact is connected with node A10, and megger test is connected with the resistive load R3 other end with node b10.Megger test It is connected with resistive load R8 one end by relay J12 normally opened contact with node C10, megger test resistive load The R8 other end is connected with node PE10.Normally opened contact and high-pressure side A binding posts that node A10 passes through relay J10, J11 Connection, node C10 is connected by relay J10 normally opened contact with high-pressure side C binding posts.Node b10 passes through relay J15 Normally opened contact be connected with low-pressure side b binding posts.Node PE10 is connected by relay J16 normally opened contact with ground terminal Connect.

When using 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 J10/J11/J12/J13/J14/J16 is controlled when surveying high-pressure side to PE, when surveying low-pressure side to PE, control J10/J11/J12/J13/J14/J15/J16 is opened.The coil of relay is all 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 two 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 two 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 Two 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, 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 negative with capacitive Carry CD35 in parallel with resistive load HV-R5 with megger test.Relay K4, one end of relay K5 coil are grounded, Relay K4, the other end of relay K5 coil are connected with the output end OUTPUT0 of controller.Relay K6, relay One end of K7 coil is grounded, the output end OUTPUT1 of relay K6, the other end of relay K7 coil with controller Connection.Relay K8, one end of relay K9 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, is connected, node PE6 and earth terminal between node a6 and low-pressure side a binding posts by relay K2 normally opened contact 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 is high to low absolutely During edge resistance, A, B, C three-phase short circuit, connection megameter two ends after a, b, c three-phase short circuit, megameter provide 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 represents low-pressure side, and PE represents ground.The present invention substitutes transformer winding wire using the method for capacitor parallel resistance Circle, can ensure realize experiment close to reality on the premise of again can mitigate weight of equipment, it is cost-effective.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 electric capacity in part of detecting circuit breakdown, and the present invention devises Anti-misoperation circuit, such as such as Fig. 4, low-pressure side pair When PE tests insulaion resistance, regulation use megameter for 500V, if now using 1000V, and 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 Make circuit including controller, the controller be used for respectively between collection high-pressure side binding post and low-pressure side binding post, it 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 be closed, 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 be converted into data signal and pass to control Device processed, the data signal that the controller is used to transmit AD conversion module is compared with setting value, when AD conversion module is passed When the data signal passed is more than setting value, the corresponding controlling switch in control 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 is connected by relay K16 normally opened contact with ground terminal.First bleeder circuit The first input end connection of partial pressure output end and AD conversion module.One end of second bleeder circuit is normally opened by relay K17's Contact is connected with high-pressure side A binding posts, normally opened contact and low-pressure side that the other end of the second bleeder circuit passes through relay K17 A binding posts are connected.The partial pressure output end of second bleeder circuit and the second input of AD conversion module are connected.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 is connected.When the data signal that AD conversion module is transmitted 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, one end of relay K18 coil are grounded, Relay K16 coil, relay K17 coil, the other end output end respectively with controller of relay K18 coil OUTPUT9, OUTPUT10, OUTPUT11 are electrically connected.Controller can distinguish control relay K16 coil, relay K17 The energization or power-off of coil, relay K18 coil.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 AD converter can only be between -5.12V~+5.12V, resistance R1 is selected with resistance R2 sizes For 1：1000 and selection high-tension resistive, the M of such as R1=1, 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 AD 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 and having in the acquisition time port IN0-IN7 of 8 tunnel analog signals, piece has 8 tunnels to simulate gating switch and corresponding passage Address latch decoding circuit, its conversion time is 100 μ s or so.According to address latch and decoding circuit to ADDRO (A), ADDR1 (B), 3 address bits of ADDR2 (C) are latched and decoded, and it, which decodes output, 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, corresponding 3 address bits of 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 that voltage acquisition exports purpose.Pass through journey again Sequence control single chip computer is handled data, and controls the break-make of circuit relay.

The input voltage Uin analog quantitys compared with reference quantity after processing are 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 the corresponding analog voltage of 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 be -5.00V when, corresponding decimal number for (- 5.00- (- 5.12)) ÷ 0.04=3, correspondence binary system is 00000011；When output voltage Uin is+2.50V, correspondence binary system For 00111110；When output voltage Uin is -2.50V, correspondence binary system is 01000001；When output voltage Uin is+0.50V When, correspondence binary system is 01110001；When output voltage Uin is 0.99V, correspondence binary system is 10001110.Certainly, use Manual megohmmeter spread of voltage, error is to exist certainly, but its maximum voltage is not over megameter range.

After input voltage, it is delayed certain time, data signal is less than the corresponding binary number of 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 be using existing any applicable Type of alarm, such as display screen, acousto-optic.

Transformer capacity test training module includes volume test resistive load, volume test capacitive and born One or more in load, 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, controls 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 connect etc. with another after two kinds of parallel connections.

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 the different combinations access loops of load composition, the transformer of simulation different capabilities is corresponded to 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 are low and performance is stable.

In order to realize a variety of volume emulations of transformer, the transformer capacity test includes many pool-sizes with training module Test resistive load, is included between high-pressure side A binding posts and high-pressure side C binding posts per pool-size test with resistive load 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 is electrically connected with node A2, the first volume test resistive load it is another End is electrically connected with node C2, and one end of the second volume test resistive load is electrically connected with node B2, second capacity The other end of test resistive load is electrically connected 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 is electrically connected 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 other end of relay K12 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 is electrically connected 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 between son, volume test resistive load serial or parallel connection, make volume test resistive load The combinations different with capacitive load composition from volume test access loop, and the transformer of simulation different capabilities is corresponded to respectively.In order to A variety of volume emulations of transformer are realized, the transformer capacity test is negative including multigroup volume test capacitive with training module Carry, include the first capacity survey between high-pressure side A binding posts and high-pressure side C binding posts with capacitive load per pool-size test 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 is electrically connected 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 is electrically connected with node B3, and second volume test is negative with capacitive The other end of load is electrically connected with node C3, and one end of the 3rd volume test capacitive load is electrically connected with node A3, described The other end of 3rd volume test capacitive load is electrically connected with node B3, node A3 by relay K49 normally opened contact with Node A1 connections, node B3 is 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, one end of relay K56 coil connect Ground, relay K49 coil, relay K70 coil, the other end of relay K56 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 is electrically connected 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, one end of relay J6 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 two 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 constituted 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 the capacity for having transformer capacity tester to test out this transformer is how many.

Analogue transformer simulation volume test of the present invention uses resistance and capacitor combination, and the volume of power transformer is simulated respectively K5, K12, K19, K26, K49, K56, K63, K70, K90 are relay in fixed number evidence, such as Fig. 5, and R5, R12, R19 are resistance, CD5, CD12, CD19 are capacitor.When analogue transformer volume test, when operating personnel select volume test, program life K19, K63, K90 is made to close, while controlling the relay of other combined capacity circuits can 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 Instructing 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 are 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 many pool-sizes with training module Test resistive load, includes the first volume test resistive load, the second volume test per pool-size test with resistive load 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, is provided with relay J25 normally opened contact 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 is connected, 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 Volume test inductive load, the second volume test inductive load, one end connection of 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 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 is used for the command signal output control signal according to operator, controls 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 be using the rheostat for adjusting intrinsic standoff ratio manually, it would however also be possible to employ pass through control Device can adjust the rheostat of intrinsic standoff ratio, such as magnetic control rheostat.The no-load voltage ratio test function simulation of the present invention uses resistance, due to 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 performance of resistance It is stable.10KVA/0.4KVA no-load voltage ratio is such as simulated, can be fast when circuit of the invention is tested after debugging with no-load voltage ratio tester Speed, be accurate to up to 10KVA/0.4KVA.When each bleeder circuit, which is used, can adjust the rheostat of intrinsic standoff ratio by controller, 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 is connected.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 SB1-0 grades of shunting switch, controller control System automatically turns on J2/J3/J6/J9, and the 2nd kind is to open SB1-2 grades of shunting switch, and controller control automatically turns on J2/J4/J7/ J9, the 3rd kind is to open SB1-0 grades of shunting switch, 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, and each is high 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 tests use 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 is connected.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 measurement high pressure Resistance between each winding in side opens J17, J18 or J17, J19 or J17, J20, draws R（AB）、R（BC）、R（AC）Value, Here it is high-pressure side D.C. resistance test, similarly measure each winding of low-pressure side between resistance open J21, J24 or J22, J24 or Person J23, J24, draw Rab, Rac, Rbc, Ran, Rbn, Rcn, here it is low-pressure side D.C. resistance test.

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 for high-voltage variable low-voltage and changes alternating voltage Powered for the DC voltage load device 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, it would however also be possible to employ 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, 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 two ends of transformer T2 secondary side respectively with rectification module ZLQ2 Two inputs connection, the two ends of transformer T3 secondary side are connected with rectification module ZLQ3 two inputs respectively, whole It is in series between flow module ZLQ1 two output ends between electric capacity C10, rectification module ZLQ2 two output ends and is in series with electricity Hold and electric capacity C3 is in series between C2, rectification module ZLQ3 two output ends, with work(after electric capacity C1, electric capacity C2, electric capacity C2 series connection 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 are connected, 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 is connected with a resistive load.Also may be used the adjustable side of DC speed regulator To connect an adjustable rheostat of resistance, the rheostat can adjust its resistance by controller.

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）, make power change to simulate the loss work(of power transformer Rate.

Energizing test transformer, the energization examination 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 is electrically connected, 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.Control after each test training module disconnects with corresponding binding post, 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 emulation sandwich type element, then both Capacity, insulation, absorptance, loss test can be carried out, energization test can also be carried out.

Housing is emulated present invention additionally comprises transformer, 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 is corresponded 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 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 power supply binding post.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 obtains electric, exports and powered to power module, now, second connects Tentaculum KM2 normally-closed contact disconnects, and the second indicator lamp goes out.Between power supply terminal and power supply binding post 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, such as carries out capacity, absorptance, insulaion resistance, no-load voltage ratio, D.C. resistance, loss test, and use electronics and electrician Mode is electronic circuit or iron core and coil in module replacement 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, with wide adaptation range, disappear The power of consumption is small, the features such as being actually consistent with scene, is the preferable choosing as teaching operation training such as electric power teaching, training demonstration 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 to the present invention without departing from the spirit and scope of 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

1. a kind of Insulation Resistance of Transformer, absorptance simulation and training device, it is characterised in that：Including high-pressure side binding post, low Side terminal, ground terminal are pressed, is connected between the high-pressure side binding post and low-pressure side binding post by controlling switch There is megger test resistive load, be connected with absolutely by controlling switch between the high-pressure side binding post and ground terminal Edge resistance test resistive load, insulated electro is connected between the low-pressure side binding post and ground terminal by controlling switch Test resistive load is hindered, each controlling switch is electrically connected with the controller respectively, the controller is used for the instruction according to operator Signal output control signal, controls closure or the disconnection of each controlling switch.

2. Insulation Resistance of Transformer according to claim 1, absorptance simulation and training device, it is characterised in that：Insulated electro Resistance test is parallel with megger test capacitive load with the two ends of resistive load.

3. Insulation Resistance of Transformer according to claim 1 or 2, absorptance simulation and training device, it is characterised in that：It is each exhausted Edge resistance test uses resistance with resistive load, and each megger test uses capacitor with capacitive load.

4. Insulation Resistance of Transformer according to claim 1, absorptance simulation and training device, it is characterised in that：Transformer Insulaion resistance, absorptance simulation and training device include three groups of megger test resistive loads, first group of megger test Electrically connected respectively by controlling switch with high-pressure side binding post, low-pressure side binding post with the two ends of resistive load, second group The two ends of megger test resistive load are electrically connected by controlling switch with high-pressure side binding post, ground terminal respectively, The two ends of 3rd group of megger test resistive load pass through controlling switch and low-pressure side binding post, ground terminal electricity respectively Connection, every group of megger test resistive load includes a megger test resistive load or multiple insulaion resistances are surveyed Multiple megger tests in resistive load on probation, every group of megger test resistive load are in parallel with resistive load, and Every group of megger test is accessed by controlling switch respectively with multiple megger tests in resistive load with resistive load Place loop, makes the load resistance in each loop of controlling switch control access.

5. Insulation Resistance of Transformer according to claim 4, absorptance simulation and training device, it is characterised in that：First group Megger test is made up of with resistive load megger test with resistive load HV-R1, and second group of megger test is used Resistive load is made up of megger test with resistive load HV-R3, and the 3rd group of megger test resistive load is by insulating Resistance test is constituted with resistive load HV-R5, and megger test passes through the normal of relay K4 with resistive load HV-R1 one end Open contact to be connected with node A6, the normally opened contact that megger test passes through relay K5 with the resistive load HV-R1 other end It is connected with node a6, megger test is in parallel with megger test resistive load HV-R1 with capacitive load CD2, described Megger test is connected with resistive load HV-R3 one end by relay K6 normally opened contact with node A6, insulaion resistance Test is connected with the resistive load HV-R3 other end by relay K7 normally opened contact with node PE6, and megger test is used Capacitive load CD16 is in parallel with resistive load HV-R3 with megger test, and megger test is with the one of resistive load HV-R5 End is connected by relay K8 normally opened contact with node a6, and the megger test resistive load HV-R5 other end passes through Relay K9 normally opened contact is connected with node PE6, and megger test is hindered with capacitive load CD35 and megger test Property load HV-R5 it is in parallel, relay K4, one end of relay K5 coil are grounded, relay K4, relay K5 coil The other end is electrically connected with the controller, and relay K6, one end of relay K7 coil are grounded, relay K6, relay K7 The other end of coil be electrically connected with the controller, relay K8, one end of relay K9 coil are grounded, relay K8, The other end of relay K9 coil is electrically connected with the controller, node A6, a6, PE6 respectively directly with high-pressure side A terminals Son, the connection of low-pressure side a binding posts, ground terminal, or pass through relay K1's between node A6 and high-pressure side A binding posts Normally opened contact is connected, and is connected between node a6 and low-pressure side a binding posts by relay K2 normally opened contact, node PE6 with Connected between ground terminal by relay K3 normally opened contact, relay K1 coil, relay K2 coil, relay K3 One end of coil be grounded, relay K1 coil, relay K2 coil, relay K3 coil the other end respectively with Controller is electrically connected.

6. Insulation Resistance of Transformer according to claim 1, absorptance simulation and training device, it is characterised in that：It is described to become Depressor insulaion resistance, absorptance simulation and training device include two groups of megger test resistive loads, first group of insulaion resistance The two ends of test resistive load are electrically connected by controlling switch with high-pressure side binding post, low-pressure side binding post respectively, the Two groups of megger tests are electrically connected by controlling switch with high-pressure side binding post, ground terminal respectively with the two ends of resistive load Connect；Or first group of megger test is connected to high-pressure side binding post by controlling switch respectively with the two ends of resistive load Between low-pressure side binding post, second group of megger test is connected to by controlling switch respectively with the two ends of resistive load Between low-pressure side binding post and ground terminal；Or the two ends of first group of megger test resistive load pass through control respectively Switch processed is connected between high-pressure side binding post and ground terminal, the two ends point of second group of megger test resistive load It is not connected to by controlling switch between low-pressure side binding post and ground terminal, every group of megger test resistive load bag Include a megger test resistive load or multiple megger test resistive loads, every group of megger test resistance Property load in multiple megger tests it is in parallel with resistive load and multiple in every group of megger test resistive load Loop where megger test is accessed by controlling switch respectively with resistive load, makes each loop of controlling switch control access Load resistance.

7. Insulation Resistance of Transformer according to claim 6, absorptance simulation and training device, it is characterised in that：First group Megger test includes multiple megger test resistive loads with resistive load, and second group of megger test is with resistive Load includes multiple megger test resistive loads, and each insulaion resistance of first group of megger test resistive load is surveyed One end of resistive load on probation is connected by the normally opened contact of relay with node A10, and first group of megger test is with resistive The other end of each megger test resistive load of load is connected with node b10, and second group of megger test is with resistive One end of each megger test resistive load of load is connected by the normally opened contact of relay with node C10, second group The other end of each megger test resistive load of megger test resistive load is connected with node PE10, node A10 is connected by the normally opened contact of relay with high-pressure side binding post, normally opened contact and high pressure that node C10 passes through relay Side terminal son connection, node b10 is connected by the normally opened contact of relay with low-pressure side binding post, node PE10 by after The normally opened contact of electrical equipment is connected with ground terminal.

8. Insulation Resistance of Transformer according to claim 1, absorptance simulation and training device, it is characterised in that：It is described to become Depressor insulaion resistance, absorptance simulation and training device are additionally provided with Anti-misoperation circuit, and the Anti-misoperation circuit includes controller, The controller for gathering between high-pressure side binding post and low-pressure side binding post respectively, low-pressure side binding post is with being grounded Input voltage between terminal, between high-pressure side binding post and ground terminal, and be compared respectively with corresponding setting value, When the input voltage of collection is more than setting value, the corresponding control in control Insulation Resistance of Transformer, absorptance simulation and training device Switch processed can not be closed, and prevent the measurement of corresponding insulaion resistance from being normally carried out, and output alarm signal carries out alarm.

9. Insulation Resistance of Transformer according to claim 8, absorptance simulation and training device, it is characterised in that：The height Press between side terminal and low-pressure side binding post, between low-pressure side binding post and ground terminal, high-pressure side binding post Bleeder circuit is connected between ground terminal, each bleeder circuit is connected to high pressure side terminal by controlling switch Between son and low-pressure side binding post, between low-pressure side binding post and ground terminal, high-pressure side binding post and ground terminal Between, the partial pressure output end of each bleeder circuit is connected with the input of AD conversion module respectively, and the AD conversion module is used to divide The voltage after each bleeder circuit partial pressure is not gathered, and is converted into data signal and passes to controller, and the controller is used for AD The data signal of modular converter transmission is compared with setting value, when the data signal that AD conversion module is transmitted is more than setting value When, control Insulation Resistance of Transformer, the corresponding controlling switch in absorptance simulation and training device can not be closed, and make corresponding insulated electro The measurement of resistance can not be normally carried out, and output alarm signal carries out alarm.

10. Insulation Resistance of Transformer according to claim 1, absorptance simulation and training device, it is characterised in that：The control Device processed is communicated with computer or Digiplex, the command signal for receiving computer or Digiplex, or, institute State controller to be communicated with touch-screen, the command signal for receiving touch-screen.