CN207164145U - Insulaion resistance and the test integrated device of dielectric loss - Google Patents
Insulaion resistance and the test integrated device of dielectric loss Download PDFInfo
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- CN207164145U CN207164145U CN201721263394.5U CN201721263394U CN207164145U CN 207164145 U CN207164145 U CN 207164145U CN 201721263394 U CN201721263394 U CN 201721263394U CN 207164145 U CN207164145 U CN 207164145U
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- 230000001105 regulatory effect Effects 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
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Abstract
The utility model discloses a kind of insulaion resistance and the test integrated device of dielectric loss, mainly include CPU, signal input module, the high voltage output module being connected with CPU, dielectric loss measurement module, insulation measurement module, human-computer interaction module, the output end of high voltage output module and the high-pressure side of tested device are connected, and the low-pressure side of tested device is connected by input of the signal input module respectively with dielectric loss measurement module, insulation measurement module；The high voltage output module input single-phase electric main, export high-voltage ac power or/and high-voltage DC power supply.The utility model only needs input single-phase electric main by high voltage output module, high-voltage ac power and high-voltage DC power supply can be just exported simultaneously, when carrying out the test of dielectric loss and insulaion resistance, wiring is tested without changing, you can complete the test of two pilot projects.
Description
Technical field
A kind of high voltage test device is the utility model is related to, is surveyed more particularly to a kind of insulaion resistance and dielectric loss
Try integrated apparatus.
Background technology
Capacitive power equipment is important power transmission and transforming equipment, mainly including current transformer, sleeve pipe, coupled capacitor device,
Capacitance type potential transformer etc., its safe operation are to influence one of power system security, stable and economical operation principal element,
Carrying out preventive trial to it being capable of discovering device hidden danger in time.The test of dielectric loss and insulaion resistance is that capacitive equipment is pre-
Two fundamental test projects of anti-property experiment, it is necessary to use two sets of testers of dielectric loss measuring instrument and megameter during work on the spot
To complete, dielectric loss measuring instrument needs external AC power supply, and megameter need to use DC supply input, does not often cover the test cable of instrument also not
Identical, when carrying out preventive trial, pilot project need to change test wiring when switching, and cause workload big, operating efficiency is low.
Therefore need badly and provide a kind of new insulaion resistance with dielectric loss testing device to solve the above problems.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of insulaion resistance and the testing integrated makeup of dielectric loss
Put, when carrying out the test of dielectric loss and insulaion resistance, test wiring without changing, you can complete the survey of two pilot projects
Examination.
In order to solve the above technical problems, the technical scheme that the utility model uses is：There is provided a kind of insulaion resistance with
The test integrated device of dielectric loss, the signal input module being mainly connected including CPU, with CPU, high voltage output module, medium
Loss measurement module, insulation measurement module, human-computer interaction module, the output end of high voltage output module and the height of tested device
Press side connection, the low-pressure side of tested device by signal input module respectively with dielectric loss measurement module, insulation measurement
The input of module is connected；
The high voltage output module input single-phase electric main, export high-voltage ac power or/and high-voltage DC power supply.
In one preferred embodiment of the utility model, the high voltage output module includes thyristor regulating volt circuit, isolation
Transformer, full bridge rectifier, Buck converters, inverter circuit, high-frequency filter circuit, step-up transformer, tandem voltage multiplying rectifier
Circuit, control circuit, isolation adjustable transformer, full bridge rectifier, Buck converters, inverter circuit, high-frequency filter circuit according to
It is secondary be connected, the output end of high-frequency filter circuit is connected with tandem voltage doubling rectifing circuit, step-up transformer respectively, control circuit with it is inverse
Become circuit in parallel, thyristor regulating volt circuit, control circuit are connected with CPU.The high voltage output module can export high pressure friendship
Flow power supply and high-voltage DC power supply.
In one preferred embodiment of the utility model, the high voltage output module includes thyristor regulating volt circuit, isolation
Transformer, full bridge rectifier, Buck converters, inverter circuit, high-frequency filter circuit, two-way switching switch, step-up transformer,
Tandem voltage doubling rectifing circuit, pwm circuit, control circuit, isolating transformer, full bridge rectifier, Buck converters, inversion electricity
Road, high-frequency filter circuit, two-way switching switch are sequentially connected, and the output end of two-way switching switch is electric with tandem voltage multiplying rectifier respectively
Road, step-up transformer are connected, and control circuit is in parallel with inverter circuit, thyristor regulating volt circuit, control circuit, two-way switching switch
It is connected with CPU.The switching switched by two-way switching, the high voltage output module can export high-voltage ac power or high pressure
Dc source.
In one preferred embodiment of the utility model, the insulation measurement module mainly includes sample resistance network
Circuit, programme-controlled gain circuit, A/D change-over circuits, sample resistance lattice network, programme-controlled gain circuit, A/D change-over circuits connect successively
Connect, sample resistance lattice network, programme-controlled gain circuit, A/D change-over circuits are connected with CPU；
The sample resistance lattice network, the resistance by changing sample resistance obtain the output at tested insulaion resistance both ends
Voltage；
The programme-controlled gain circuit, suitable A/D conversions electricity is amplified to the voltage signal of sample resistance lattice network output
The precision on road；
The A/D change-over circuits, the output voltage of programme-controlled gain circuit is converted into data signal.
The insulation measurement module has larger measuring range, and accuracy is high, suitable for all power equipments
Insulation measurement.
Further, the sample resistance lattice network includes tested insulaion resistance Rx, sample resistance R1-R4, resistance
R5-R8, operational amplifier U1, electric capacity C1, C2, relay K1-K3, it is tested insulaion resistance Rx, sample resistance R1-R4 successively
Series connection, relay K1-K3 is in parallel with sample resistance R1-R3 respectively, and the voltage at sample resistance R1-R4 both ends inputs U1 respectively
Reverse input end and positive input, R6 is connected with reverse input end, and R7 is connected with positive input, connects after C1 is in parallel with R5
It is connected between U1 reverse input end and output end, U1 positive input is connected to after C2 is in parallel with R8.
The beneficial effects of the utility model are：The utility model only needs input single-phase to exchange city by high voltage output module
Electricity, it becomes possible to while high-voltage ac power and high-voltage DC power supply are exported, when carrying out the test of dielectric loss and insulaion resistance,
Wiring is tested without changing, you can completes the test of two pilot projects.
Brief description of the drawings
Fig. 1 is the structural frames of the utility model insulaion resistance and the test integrated preferred embodiment of device one of dielectric loss
Figure；
Fig. 2 is the circuit block diagram of the preferred embodiment of high voltage output module one；
Fig. 3 is the circuit block diagram of another preferred embodiment of the high voltage output module；
Fig. 4 is the circuit diagram of the tandem voltage doubling rectifing circuit；
Fig. 5 is the theory diagram of the control circuit；
Fig. 6 is the circuit diagram of the sample resistance lattice network；
Fig. 7 is the circuit diagram of the programme-controlled gain circuit；
Fig. 8 is the circuit diagram of the A/D change-over circuits；
Embodiment
Preferred embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings, so that the advantages of the utility model
It can be easier to be readily appreciated by one skilled in the art with feature, it is apparent clear and definite so as to be made to the scope of protection of the utility model
Define.
Referring to Fig. 1, the utility model embodiment includes：
A kind of insulaion resistance and the test integrated device of dielectric loss, the signal input being mainly connected including CPU, with CPU
Module, high voltage output module, dielectric loss measurement module, insulation measurement module, human-computer interaction module, high voltage output module
Output end and the high-pressure side of tested device connect, the low-pressure side of tested device by signal input module respectively with dielectric loss
Measurement module, the input of insulation measurement module are connected.
The CPU is the control core of the device, powerful using C8051F020 type single-chip microcomputers, small volume.It is described
High voltage output module input single-phase electric main, export high-voltage ac power or/and high-voltage DC power supply.The signal inputs mould
Block is controlled by CPU, and high voltage output module output is switched power supply into insulation measurement module or dielectric loss measurement module.
The insulation measurement module is used for the output voltage u, sample resistance value r, the multiplication factor x of programme-controlled gain for measuring test item
With high tension voltage value U, the insulaion resistance of test item is calculated by CPU, and is shown on human-computer interaction module.The medium damage
Consumption measurement module measures standard loop electric current and subject loop current amplitude and its phase etc., and the electricity of test product is calculated by CPU
Capacitance and Dielectric loss tangent value, and be shown on human-computer interaction module.The human-computer interaction module includes keyboard, liquid crystal display
Screen, easy to operation and observation measurement result.
In one embodiment, high-voltage ac power and high pressure can be exported simultaneously with reference to Fig. 2, the high voltage output module
Dc source, it includes thyristor regulating volt circuit, isolating transformer, full bridge rectifier, Buck converters, inverter circuit, height
Frequency filter circuit, step-up transformer, tandem voltage doubling rectifing circuit, control circuit, isolation adjustable transformer, full bridge rectifier,
Buck converters, inverter circuit, high-frequency filter circuit are sequentially connected, the output end of high-frequency filter circuit respectively with tandem times repoussage
Current circuit, step-up transformer are connected, and control circuit is in parallel with inverter circuit, thyristor regulating volt circuit, control circuit with CPU phases
Even.
Wherein, the tandem voltage doubling rectifing circuit includes electric capacity C1-Cn, diode D1-Dn, the connection of each electrical equipment
For relation as shown in figure 4, input voltage is U, output voltage is n times of input voltage.
With reference to Fig. 5, the control circuit mainly includes DSP, the voltage hall sensor being connected with DSP, current Hall and passed
Sensor, the output end of the inverter circuit are connected with voltage hall sensor, current Hall sensor respectively, DSP output end
It is connected with the input of inverter circuit, DSP and CPU is connected with each other.Preferably, the DSP is controlled using TMS320C2812 types DSP
Device processed.The voltage hall sensor, current Hall sensor gather the voltage of the inverter circuit output, electric current letter respectively
Number, carrying out A/D conversions into dsp controller, dsp controller is by the feedback of voltage, current signal, using SVPWM algorithms,
IGBT cut-offs in output discrete control inverter circuit, reaches the purpose of control inverter circuit frequency and amplitude.
Single-phase 220V electric mains enter thyristor regulating volt circuit, and thyristor regulating volt circuit is connected with CPU, and CPU controls can
The break-make of silicon is controlled, the voltage of continuous tuning range is obtained, is then electrically isolated by isolating transformer, then by full-bridge rectification
Circuit, DC voltage is obtained, the DC voltage exports the direct current of continuous-stable after Buck is converted, inverse to single-phase bridge
Become the adjustable alternating voltage of circuit evolving, the control circuit adjusts inversion alternating current voltage frequency, is eliminated through high-frequency filter circuit high
Frequency composition obtains standard sine wave.During dielectric loss measurement, standard friendship is obtained after standard sine wave access step-up transformer boosting
High voltage power supply is flowed, the scope of the standard AC high pressure is 1-10kV.During insulation measurement, standard sine wave access tandem
Voltage doubling rectifing circuit continues to boost, and finally gives DC high-voltage power supply, the scope of the high direct voltage is 0.5-5kV.
In another embodiment, with reference to Fig. 3, the high voltage output module can export high-voltage ac power or high straightening
Power supply is flowed, it includes thyristor regulating volt circuit, isolating transformer, full bridge rectifier, Buck converters, inverter circuit, high frequency
Filter circuit, two-way switching switch, step-up transformer, tandem voltage doubling rectifing circuit, pwm circuit, control circuit, isolate transformation
Device, full bridge rectifier, Buck converters, inverter circuit, high-frequency filter circuit, two-way switching switch are sequentially connected, two-way to cut
The output end for changing switch is connected with tandem voltage doubling rectifing circuit, step-up transformer respectively, and control circuit is in parallel with inverter circuit, can
Control silicon regulating circuit, control circuit, two-way switching switch are connected with CPU.
Wherein described tandem voltage doubling rectifing circuit, control circuit can be identical with circuit in one embodiment.
The operation principle of the present embodiment mesohigh output module with above-described embodiment mesohigh output module similarly, through high frequency
Filter circuit eliminates the switching that the standard sine wave that radio-frequency component obtains is switched by two-way switching, and outputting standard exchange is high respectively
Voltage source or DC high-voltage power supply, two-way switching switch access tandem voltage doubling rectifing circuit or step-up transformer are controlled by CPU.It is situated between
During matter loss measurement, control circuit controls two-way switching switch, and standard AC is obtained after standard sine wave access step-up transformer
High voltage power supply.During insulation measurement, control circuit controls two-way switching switch, standard sine wave access tandem voltage multiplying rectifier electricity
Road continues to boost, and finally gives DC high-voltage power supply.
The thyristor regulating volt circuit, full bridge rectifier, Buck converters, inverter circuit, high-frequency filter circuit are adopted
Realized with custom circuit.The isolating transformer, step-up transformer, two-way switching switch can use existing commercially available prod.
The insulation measurement module mainly includes sample resistance lattice network, programme-controlled gain circuit, A/D conversion electricity
Road, sample resistance lattice network, programme-controlled gain circuit, A/D change-over circuits are sequentially connected, sample resistance lattice network, program control increasing
Beneficial circuit, A/D change-over circuits are connected with CPU.
The sample resistance lattice network, the resistance by changing sample resistance obtain the output at tested insulaion resistance both ends
Voltage, its circuit diagram is as shown in fig. 6, including tested insulaion resistance Rx, sample resistance R1-R4, resistance R5-R8, operation amplifier
Device U1, electric capacity C1, C2, relay K1-K3, tested insulaion resistance Rx, sample resistance R1-R4 are sequentially connected in series, and relay K1-
K3 is in parallel with sample resistance R1-R3 respectively, is connected with CPU, for switching sample resistance R1-R3, sample resistance R1-R4
The voltage at both ends inputs U1 reverse input end and positive input respectively, and R6 is connected with reverse input end, and R7 inputs with positive
End is connected, and is connected to after C1 is in parallel with R5 between U1 reverse input end and output end, U1 is being connected to after C2 is in parallel with R8 just
To input.Resistance R5-R8, operational amplifier U1, electric capacity C1, C2 composition difference ratio circuit, U1 use accurate amplifier
OP07, the proportionality coefficient of difference ratio circuit is 1, i.e. R5=R6=R7=R8.The sample resistance lattice network is according to test product
The size of insulaion resistance changes sample resistance value, is realized by control relay K1-K3 contact, test product insulaion resistance and takes
Sample resistance magnitude of voltage in sample resistant series loop changes, and by voltage sample and programme-controlled gain circuit is combined, by difference
Ratio circuit is divided to adjust voltage signal to the input voltage for being suitable for A/D conversions.
The programme-controlled gain circuit, suitable A/D conversions electricity is amplified to the voltage signal of sample resistance lattice network output
The precision on road, its circuit diagram as shown in fig. 7, comprises digital regulation resistance U1, operational amplifier U2, U3, resistance R1-R8, it is each electrically
The annexation of element is as illustrated, digital regulation resistance U1 uses X9110, and its pin SO, SCK ,/SI, CS are corresponding to CPU's draws
Pin is connected, and U2, U3 use accurate amplifier OP07, by digital regulation resistance X9110 and the control amplification of accurate amplifier OP07 configuration programs
Device, the circuit can realize the consecutive variations of multiplication factor.
The A/D change-over circuits are as shown in figure 8, using A/D conversion chip ADS1110, by the output of programme-controlled gain circuit
Voltage conversion is data signal, inputs CPU.According to output voltage u, sample resistance value r, programme-controlled gain multiplication factor x and height
Magnitude of voltage U is pressed, the resistance R of insulaion resistance can be calculated, calculation formula is R=U/ (u/r*x).
The insulation measurement module has larger measuring range, and accuracy is high, suitable for all power equipments
Insulation measurement.
The dielectric loss measurement module includes high stability standard capacitor and formed with measuring circuit, and subject loop is by quilt
Test product and measuring circuit composition, measurement circuitry are made up of sample resistance and preamplifier and A/D converter.Pass through measuring circuit
Standard loop electric current and subject loop current amplitude and its phase etc. are measured respectively, then by CPU with the real-time collection side of digitlization
Method, the capacitance and Dielectric loss tangent value of test product can be drawn by vector calculus.
The utility model only needs input single-phase electric main by high voltage output module, it becomes possible to while export high-voltage alternating
Power supply and high-voltage DC power supply, when carrying out the test of dielectric loss and insulaion resistance, test wiring without changing, you can complete
The test of two pilot projects.
Embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model, it is every
The equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or be directly or indirectly used in
Other related technical areas, similarly it is included in scope of patent protection of the present utility model.
Claims (5)
1. a kind of insulaion resistance and the test integrated device of dielectric loss, it is characterised in that be mainly connected including CPU, with CPU
Signal input module, high voltage output module, dielectric loss measurement module, insulation measurement module, human-computer interaction module, high pressure
The high-pressure side of the output end of output module and tested device connects, the low-pressure side of tested device by signal input module respectively with
Dielectric loss measurement module, the input of insulation measurement module are connected；
The high voltage output module input single-phase electric main, export high-voltage ac power or/and high-voltage DC power supply.
2. insulaion resistance according to claim 1 and the test integrated device of dielectric loss, it is characterised in that the high pressure
Output module includes thyristor regulating volt circuit, isolating transformer, full bridge rectifier, Buck converters, inverter circuit, high frequency filter
Wave circuit, step-up transformer, tandem voltage doubling rectifing circuit, control circuit, isolation adjustable transformer, full bridge rectifier, Buck
Converter, inverter circuit, high-frequency filter circuit are sequentially connected, and the output end of high-frequency filter circuit is electric with tandem voltage multiplying rectifier respectively
Road, step-up transformer are connected, and control circuit is in parallel with inverter circuit, and thyristor regulating volt circuit, control circuit are connected with CPU.
3. insulaion resistance according to claim 1 and the test integrated device of dielectric loss, it is characterised in that the high pressure
Output module includes thyristor regulating volt circuit, isolating transformer, full bridge rectifier, Buck converters, inverter circuit, high frequency filter
Wave circuit, two-way switching switch, step-up transformer, tandem voltage doubling rectifing circuit, pwm circuit, control circuit, isolating transformer,
Full bridge rectifier, Buck converters, inverter circuit, high-frequency filter circuit, two-way switching switch are sequentially connected, and two-way switching is opened
The output end of pass is connected with tandem voltage doubling rectifing circuit, step-up transformer respectively, and control circuit is in parallel with inverter circuit, controllable silicon
Regulating circuit, control circuit, two-way switching switch are connected with CPU.
4. insulaion resistance according to claim 1 and the test integrated device of dielectric loss, it is characterised in that the insulation
Resistance measuring module mainly includes sample resistance lattice network, programme-controlled gain circuit, A/D change-over circuits, sample resistance network electricity
Road, programme-controlled gain circuit, A/D change-over circuits are sequentially connected, sample resistance lattice network, programme-controlled gain circuit, A/D change-over circuits
It is connected with CPU；
The sample resistance lattice network, the resistance by changing sample resistance obtain the output electricity at tested insulaion resistance both ends
Pressure；
The programme-controlled gain circuit, suitable A/D change-over circuits are amplified to the voltage signal of sample resistance lattice network output
Precision；
The A/D change-over circuits, the output voltage of programme-controlled gain circuit is converted into data signal.
5. insulaion resistance according to claim 4 and the test integrated device of dielectric loss, it is characterised in that the sampling
Resistance network circuit include tested insulaion resistance Rx, sample resistance R1-R4, resistance R5-R8, operational amplifier U1, electric capacity C1,
C2, relay K1-K3, tested insulaion resistance Rx, sample resistance R1-R4 are sequentially connected in series, relay K1-K3 respectively with sampling
Resistance R1-R3 is in parallel, and the voltage at sample resistance R1-R4 both ends inputs U1 reverse input end and positive input, R6 respectively
It is connected with reverse input end, R7 is connected with positive input, and U1 reverse input end and output end are connected to after C1 is in parallel with R5
Between, U1 positive input is connected to after C2 is in parallel with R8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721263394.5U CN207164145U (en) | 2017-09-28 | 2017-09-28 | Insulaion resistance and the test integrated device of dielectric loss |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721263394.5U CN207164145U (en) | 2017-09-28 | 2017-09-28 | Insulaion resistance and the test integrated device of dielectric loss |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449970A (en) * | 2017-09-28 | 2017-12-08 | 国网安徽省电力公司检修公司 | Insulaion resistance and the test integrated device of dielectric loss |
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2017
- 2017-09-28 CN CN201721263394.5U patent/CN207164145U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449970A (en) * | 2017-09-28 | 2017-12-08 | 国网安徽省电力公司检修公司 | Insulaion resistance and the test integrated device of dielectric loss |
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