CN206906481U - Short-circuit impedance measures experimental rig - Google Patents
Short-circuit impedance measures experimental rig Download PDFInfo
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- CN206906481U CN206906481U CN201720753649.XU CN201720753649U CN206906481U CN 206906481 U CN206906481 U CN 206906481U CN 201720753649 U CN201720753649 U CN 201720753649U CN 206906481 U CN206906481 U CN 206906481U
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Abstract
A kind of short-circuit impedance measures experimental rig, including：Analogue transformer, pressure regulator, resistance bed, first voltage transformer, second voltage transformer, the first current sensor, the second current sensor and oscillograph；The primary coil of analogue transformer and pressure regulator composition primary side loop, secondary coil and the resistance bed composition secondary loop of analogue transformer；First current sensor is connected on primary side loop, and the second current sensor is connected on secondary loop；The primary coil of first voltage transformer is in parallel with the primary coil of analogue transformer, and the primary coil of second voltage transformer is in parallel with the secondary coil of analogue transformer；The secondary coil of first voltage transformer, the secondary coil of second voltage transformer, the first current sensor and the second current sensor are respectively connecting to oscillograph；First voltage transformer, second voltage transformer, the first current sensor, the second current sensor and oscillograph common ground.The utility model can realize the accurate measurement of short-circuit impedance.
Description
Technical field
The utility model is on impedance measurement technique, and experimental rig is measured especially with regard to a kind of short-circuit impedance.
Background technology
Real transformer in the process of running, after insulation damages, is likely encountered discharged condition, so in simulation transformation
In device experimentation, measurement short-circuit impedance is generally required, the calculating of short-circuit impedance has higher want to the accuracy of electric parameter
Ask, it is necessary to monitor that the voltage of terminal, current sensor are accurate enough on-line, it is existing to meet error requirements that short-circuit impedance calculates
There is the accurate measurement that technology can not realize short-circuit impedance.
Utility model content
The utility model provides a kind of short-circuit impedance measurement experimental rig, to realize the accurate measurement of short-circuit impedance.
To achieve these goals, the utility model provides a kind of short-circuit impedance measurement experimental rig, including：Simulation becomes
Depressor, pressure regulator, resistance bed, first voltage transformer, second voltage transformer, the first current sensor, the second current sense
Device and oscillograph；Wherein
The primary coil of the analogue transformer and pressure regulator composition primary side loop, the secondary of the analogue transformer
Coil and resistance bed composition secondary loop；First current sensor is connected on the primary side loop, second electricity
Flow sensor is connected on the secondary loop, and first current sensor connects second current sensor；Described
The primary coil of one voltage transformer is in parallel with the primary coil, primary coil and the pair of the second voltage transformer
Side coils from parallel connection of coils；The secondary coil of the first voltage transformer, the secondary coil of the second voltage transformer, described first
Current sensor and second current sensor are respectively connecting to the oscillograph；The first voltage transformer, the second electricity
Press transformer, the first current sensor, the second current sensor and the oscillograph common ground.
Experimental rig is measured using short-circuit impedance of the present utility model, no short circuit winding can be carried out, without winding displacement
Experiment, the experiment of shorted section winding, the experiment of axis of winding displacement and winding width realize short circuit resistance to the test procedure of displacement
Anti- accurate measurement.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation that short-circuit impedance of the present utility model measures experimental rig.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Fig. 1 is the structural representation that short-circuit impedance of the present utility model measures experimental rig, as shown in figure 1, the short circuit hinders
Anti- measurement experimental rig includes：Analogue transformer 101, pressure regulator 102, resistance bed 103, voltage transformer 104, voltage transformer
105th, current sensor 106, current sensor 107 and oscillograph 108.
The primary coil 1011 of analogue transformer 101 forms primary side loop, the pair of analogue transformer 101 with pressure regulator 102
Sideline circle 1012 forms secondary loop with resistance bed 103.
Current sensor 106 is connected on primary side loop, and current sensor 107 is connected on secondary loop, current sense
Device 106 connects the second current sensor 107.
The primary coil 1 of voltage transformer 104 is in parallel with the primary coil 1011 of analogue transformer 101, voltage transformer
105 primary coil 3 is in parallel with the secondary coil 1012 of analogue transformer 101.
The secondary coil 2 of voltage transformer 104, the secondary coil 4 of voltage transformer 105, current sensor 106 and electric current
Sensor 107 is respectively connecting to the different passages (CH1, CH2, CH3, CH4) of oscillograph 108.Also, voltage transformer 104, electricity
Transformer 105, current sensor 106, current sensor 107 and the common ground of oscillograph 108 are pressed, as passed through oscillograph in Fig. 1
108 thick lines.
Illustrate how to carry out short-circuit impedance measurement using short-circuit impedance of the present utility model measurement experimental rig below, wherein
Including：1：Without short circuit winding, the test procedure without winding displacement；2：The test procedure of shorted section winding；3：Axis of winding position
The test procedure of shifting；4：Test procedure of the winding width to displacement.
1st, without short circuit winding, the test procedure without winding displacement
(1) analogue transformer is maintained at original state, no short circuit winding, without winding displacement；
(2) short-circuit impedance of analogue transformer is measured with conventional method；
(3) each equipment room line is connected as shown in Figure 1；
(4) after detection wiring is errorless, the power supply of oscillograph 108 is connected, opens oscillograph 108；
(5) power supply of pressure regulator 102, the slow rise voltage of pressure regulator 102 to 400V, while observation oscilloscope 108 are connected,
Determine in pressure process, voltage and current is in normal range (NR)；
(6) record data, 4 ripples of voltage, electric current of oscillograph storage first and second side (primary coil and secondary coil)
Shape；
(7) voltage (in the range of ± 5%, between 380V~420V) of pressure regulator 102 is adjusted in right amount, records 4 again
Waveform, short-circuit impedance value is calculated according to formula；
(8) voltage of pressure regulator 102 retreats to zero, disconnects the power supply of pressure regulator 102；
(9) stability of this method measurement three times, is verified in repeat step (5)~(8).
2nd, the test procedure of shorted section winding
(1) winding unshifts, 6 circles of short circuit secondary high-tension coil；
(2) short-circuit impedance of analogue transformer is measured with conventional method；
(3) each equipment room line is connected as shown in Figure 1；
(4) after detection wiring is errorless, the power supply of oscillograph 108 is connected, opens oscillograph 108；
(5) power supply of pressure regulator 102, the slow rise voltage of pressure regulator 102 to 400V, while observation oscilloscope 108 are connected, really
Determine in pressure process, voltage and current is in normal range (NR)；
(6) record data, 4 ripples of voltage, electric current of oscillograph storage first and second side (primary coil and secondary coil)
Shape；
(7) voltage of pressure regulator 102 (in the range of ± 5%, between 380V~420V) is adjusted in right amount, records 4 ripples again
Shape, short-circuit impedance value is calculated according to formula；
(8) voltage of pressure regulator 102 retreats to zero, disconnects the power supply of pressure regulator 102；
(9) 12,18,24,30 circles of short circuit secondary high-tension coil successively, repeat step (2)~(8).
3rd, the test procedure of axis of winding displacement (specific move mode can regard execute-in-place and adjust)
(1) winding not short circuit, width is to unshifting, #1 secondary high-tension coil axial displacements 40mm；
(2) short-circuit impedance of analogue transformer 101 is measured with conventional method；
(3) each equipment room line is connected as shown in Figure 1；
(4) after detection wiring is errorless, the power supply of oscillograph 108 is connected, opens oscillograph 108；
(5) power supply of pressure regulator 102, the slow rise voltage of pressure regulator 102 to 400V, while observation oscilloscope 108 are connected, really
Determine in pressure process, voltage and current is in normal range (NR)；
(6) record data, 4 ripples of voltage, electric current of oscillograph storage first and second side (primary coil and secondary coil)
Shape；
(7) pressure regulator voltage 102 (in the range of ± 5%, between 380V~420V) is adjusted in right amount, records 4 ripples again
Shape, short-circuit impedance value is calculated according to formula；
(8) voltage of pressure regulator 102 retreats to zero, disconnects pressure regulator power supply；
(9) #2, #3, #4 secondary high-tension coil axial displacement 40mm, repeat step (2)~(8) are increased successively.
4th, test procedure of the winding width to displacement (specific move mode adjusts regarding execute-in-place)
(1) winding not short circuit, axially unshifts, and #1 secondary high-tension coil width is to displacement 20mm；
(2) short-circuit impedance of analogue transformer is measured with conventional method；
(3) each equipment room line is connected as shown in Figure 1；
(4) after detection wiring is errorless, the power supply of oscillograph 108 is connected, opens oscillograph 108；
(5) power supply of pressure regulator 102 is connected, the slowly voltage of rise pressure regulator 102 to 400V, while observation oscilloscope, really
Determine in pressure process, voltage and current is in normal range (NR)；
(6) record data, oscillograph store 4 waveforms of voltage, electric current of first and second side；
(7) voltage (in the range of ± 5%, between 380V~420V) of pressure regulator 102 is adjusted in right amount, records 4 again
Waveform, short-circuit impedance value is calculated according to formula；
(8) pressure regulator voltage retreats to zero, disconnects the power supply of pressure regulator 102；
(9) #2, #3, #4 secondary high-tension coil width are increased successively to displacement 20mm, repeat step (2)~(8).
Experimental rig is measured using short-circuit impedance of the present utility model, no short circuit winding can be carried out, without winding displacement
Experiment, the experiment of shorted section winding, the experiment of axis of winding displacement and test procedure from winding width to displacement, to realize short circuit
The accurate measurement of impedance.
Specific embodiment is applied in the utility model to be set forth principle of the present utility model and embodiment, with
The explanation of upper embodiment is only intended to help and understands method and its core concept of the present utility model；Meanwhile for this area
Those skilled in the art, according to thought of the present utility model, there will be changes, comprehensive in specific embodiments and applications
Upper described, this specification content should not be construed as to limitation of the present utility model.
Claims (1)
1. a kind of short-circuit impedance measures experimental rig, it is characterised in that including：Analogue transformer, pressure regulator, resistance bed, first
Voltage transformer, second voltage transformer, the first current sensor, the second current sensor and oscillograph；Wherein
The primary coil of the analogue transformer and pressure regulator composition primary side loop, the secondary coil of the analogue transformer
Secondary loop is formed with the resistance bed；First current sensor is connected on the primary side loop, and second electric current passes
Sensor is connected on the secondary loop, and first current sensor connects second current sensor；First electricity
Press the primary coil of transformer in parallel with the primary coil of the analogue transformer, the primary coil of the second voltage transformer
It is in parallel with the secondary coil of the analogue transformer；The secondary coil of the first voltage transformer, the second voltage mutual inductance
The secondary coil of device, first current sensor and second current sensor are respectively connecting to the oscillograph；It is described
First voltage transformer, second voltage transformer, the first current sensor, the second current sensor and the oscillograph connect jointly
Ground.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720753649.XU CN206906481U (en) | 2017-06-27 | 2017-06-27 | Short-circuit impedance measures experimental rig |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720753649.XU CN206906481U (en) | 2017-06-27 | 2017-06-27 | Short-circuit impedance measures experimental rig |
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| CN206906481U true CN206906481U (en) | 2018-01-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782070A (en) * | 2019-03-08 | 2019-05-21 | 大唐东营发电有限公司 | A kind of method of PT test short-circuit impedance |
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2017
- 2017-06-27 CN CN201720753649.XU patent/CN206906481U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782070A (en) * | 2019-03-08 | 2019-05-21 | 大唐东营发电有限公司 | A kind of method of PT test short-circuit impedance |
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