CN107748320A - A kind of iron-core reactor turn-to-turn defect test circuit and method - Google Patents
A kind of iron-core reactor turn-to-turn defect test circuit and method Download PDFInfo
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- CN107748320A CN107748320A CN201711146462.4A CN201711146462A CN107748320A CN 107748320 A CN107748320 A CN 107748320A CN 201711146462 A CN201711146462 A CN 201711146462A CN 107748320 A CN107748320 A CN 107748320A
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- 238000012360 testing method Methods 0.000 title claims abstract description 125
- 230000007547 defect Effects 0.000 title claims abstract description 48
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- 238000002474 experimental method Methods 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 239000003990 capacitor Substances 0.000 claims description 15
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- 238000007599 discharging Methods 0.000 claims description 6
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- 230000009466 transformation Effects 0.000 claims 2
- 238000009413 insulation Methods 0.000 abstract description 18
- 238000004804 winding Methods 0.000 abstract description 15
- 238000010998 test method Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1245—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of line insulators or spacers, e.g. ceramic overhead line cap insulators; of insulators in HV bushings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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Abstract
The invention discloses a kind of iron-core reactor turn-to-turn defect test circuit and method, solves existing iron-core reactor turn-to-turn defect testing method, including lightning impulse test, impulse hunting pressure test etc., wherein, the result of lightning impulse test is relevant with the turn insulation of iron-core reactor, but the examination of ripple end can only be entered to winding, and test voltage is far above industrial frequency withstand voltage peak value, it result in the technical problem that lightning impulse test can not be effectively test the turn-to-turn defect in the middle part of iron-core reactor winding, impulse hunting pressure test detects available for air reactor turn insulation, but due to there is the problems such as less number of turn and core sataration in iron-core reactor, turn insulation experiment can not use the test method of air reactor, it result in the technical problem that can not ensure that saturation unshakable in one's determination does not occur under 2 times of fundamental wave rated voltages.
Description
Technical field
The present invention relates to field of power detection, more particularly to a kind of iron-core reactor turn-to-turn defect test circuit and method.
Background technology
Iron-core reactor is primary equipment important in power network, and there is limiting short-circuit current, limiting capacitance device combination lock to gush
Stream, limit the effects such as small current neutral grounding electric current, the capacity effect for reducing nonloaded line.Because reactor is often other power equipments
Kit, generally run under without any protection, after reactor breaks down, could usually be found after burning.This
Very big hidden danger can be not only caused to the safe operation of power network, electricity consumption enterprise can also be caused damage.Wherein, iron-core reactor
Accident is caused by turn-to-turn defect mostly, therefore it is very necessary periodically to carry out turn-to-turn defects detection to iron-core reactor in power network
's.
Iron-core reactor is different from transformer device structure, each only single coil, therefore can not unshakable in one's determination in iron-core reactor
Pressed as transformer by low pressure winding, sense corresponding test voltage value in high pressure winding, can only be directly in simplex winding
Upper application test voltage.
Existing iron-core reactor turn-to-turn defect testing method, including lightning impulse test, impulse hunting pressure test etc.,
Wherein, the result of lightning impulse test and the turn insulation of iron-core reactor are relevant, but the ripple end of entering of winding can only be examined, and
Test voltage is far above industrial frequency withstand voltage peak value, and result in lightning impulse test can not lack to the turn-to-turn in the middle part of iron-core reactor winding
The technical problem that row is effectively test is trapped into, impulse hunting pressure test detects available for air reactor turn insulation, but iron
Core device can not use the experiment of air reactor due to the problems such as less number of turn and core sataration, turn insulation experiment be present
Mode, it result in the technical problem that can not ensure that saturation unshakable in one's determination does not occur under 2 times of fundamental wave rated voltages.
The content of the invention
The invention provides a kind of iron-core reactor turn-to-turn defect test circuit and method, for solving existing electricity unshakable in one's determination
Anti- device turn-to-turn defect testing method, including lightning impulse test, impulse hunting pressure test etc., wherein, lightning impulse test
As a result it is relevant with the turn insulation of iron-core reactor, but the examination of ripple end can only be entered to winding, and also test voltage is far above power frequency
Pressure-resistant peak value, it result in what lightning impulse test can not be effectively test the turn-to-turn defect in the middle part of iron-core reactor winding
Technical problem, impulse hunting pressure test detects available for air reactor turn insulation, but iron-core reactor is due to circle being present
The problems such as number less and core sataration, turn insulation experiment can not use the test method of air reactor, and result in protect
The technical problem of saturation unshakable in one's determination does not occur under 2 times of fundamental wave rated voltages for card.
A kind of iron-core reactor turn-to-turn defect test circuit provided by the invention, including：
Variable-frequency power sources module, high frequency high voltage transformer, reactor to be measured, data acquisition module, high-voltage bleeder, compensation electricity
Container, the first current sensor and the second current sensor；
The input of the variable-frequency power sources module electrically connects with mains supply inlet wire, the output end of the variable-frequency power sources module
Electrically connected with the side of the high frequency high voltage transformer, for exporting the frequency conversion test voltage of predeterminated frequency to the high-frequency and high-voltage
Transformer；
First end of the opposite side of the high frequency high voltage transformer respectively with the reactor to be measured electrically connects, for applying
Test voltage value is preset to the reactor to be measured, wherein, connecting node is first node, the second end of the reactor to be measured
It is connected with the ground potential of circuit；
One end of the compensation capacitor is connected with the first node, the other end of the compensating electric capacity and the ground of circuit
Current potential connects；
The input of the high-voltage bleeder is connected on the first node；
First current sensor and second current sensor are separately positioned on described the first of reactor to be measured
On end and second end；
The data acquisition module electrically connects with the output end of the high-voltage bleeder, for getting the high-frequency and high-voltage
The output voltage values of transformer；
The data acquisition module electrically connects with first current sensor and second current sensor respectively, uses
In getting the test current waveform on the reactor to be measured.
Preferably, threephase switch, the threephase switch are connected to the mains supply inlet wire and the variable-frequency power sources module
Input between.
Preferably, the high-voltage bleeder includes：
First resistor, second resistance, the first electric capacity and the second electric capacity；
The first resistor and first electric capacity are in parallel, form the first bleeder circuit；
The second resistance and second electric capacity are in parallel, form the second bleeder circuit；
One end of first bleeder circuit is connected with one end of second bleeder circuit, wherein, connecting node
Two nodes；
The other end of first bleeder circuit is the input of the high-voltage bleeder, and the section point is the height
The output end of divider is pressed, the other end of second bleeder circuit and the ground potential of circuit connect.
Preferably, in addition to：First delay impedance and the second delay impedance；
First delay impedance is connected between first current sensor and the data acquisition module, and described
Two delay impedances are connected between second current sensor and the data acquisition module.
Preferably, in addition to：
3rd delay impedance；
3rd delay impedance is connected between the output end of the high-voltage bleeder and the data acquisition module.
A kind of iron-core reactor turn-to-turn defect testing method provided by the invention, including：
Variable-frequency power sources module exports the frequency conversion test voltage of the first predeterminated frequency to the high frequency high voltage transformer；
High frequency high voltage transformer output first presets test voltage to the reactor to be measured；
The data acquisition module gets the first test current waveform on the reactor to be measured；
Judge that the first test current waveform whether there is periodic discharging signal, if so, then the iron-core reactor is deposited
In turn-to-turn defect, if it is not, then turn-to-turn defect is not present in the iron-core reactor.
Preferably, variable-frequency power sources module exports the frequency conversion test voltage of the first predeterminated frequency to the high frequency high voltage transformer
Also include before：
First predeterminated frequency is calculated according to the first preset formula, first preset formula is：
Wherein, fxFor the first predeterminated frequency, LxFor the reactance value of reactor to be measured, C1For the capacitance of compensation capacitor.
Preferably, judge that the first test current waveform whether there is periodic discharging signal, if so, the then electricity unshakable in one's determination
Anti- device also includes after turn-to-turn defect being present：
The second default test voltage of high frequency high voltage transformer output is to the reactor to be measured, wherein the described second default examination
Electrical verification is pressed there are time difference Δ t with the described first default test voltage；
The data acquisition module gets the second test current waveform on the reactor to be measured；
It is calculated that arcing distance is poor, and second preset formula is according to the second preset formula：
lx=v × Δ t；
Wherein, lxPoor for arcing distance, v is the velocity of discharge.
Preferably, it is described to judge that the first test current waveform specifically includes with the presence or absence of periodic discharging signal：
Denoising is obtained by Denoising Algorithm according to the described first test current waveform and tests current waveform, judges the denoising
Test current waveform whether there is modulus maximum.
As can be seen from the above technical solutions, the present invention has advantages below：
A kind of iron-core reactor turn-to-turn defect test circuit provided by the invention, including：Variable-frequency power sources module, high-frequency and high-voltage
Transformer, reactor to be measured, data acquisition module, high-voltage bleeder, compensation capacitor, the first current sensor and the second electric current
Sensor；The input of the variable-frequency power sources module electrically connects with mains supply inlet wire, the output end of the variable-frequency power sources module
Electrically connected with the side of the high frequency high voltage transformer, for exporting the frequency conversion test voltage of predeterminated frequency to the high-frequency and high-voltage
Transformer；First end of the opposite side of the high frequency high voltage transformer respectively with the reactor to be measured electrically connects, for applying
Test voltage value is preset to the reactor to be measured, wherein, connecting node is first node, the second end of the reactor to be measured
It is connected with the ground potential of circuit；One end of the compensation capacitor is connected with the first node, the compensating electric capacity it is another
End is connected with the ground potential of circuit；The input of the high-voltage bleeder is connected on the first node；First electric current
Sensor and second current sensor are separately positioned in the first end and second end of reactor to be measured；It is described
Data acquisition module electrically connects with the output end of the high-voltage bleeder, for getting the output of the high frequency high voltage transformer
Magnitude of voltage；The data acquisition module electrically connects with first current sensor and second current sensor respectively, uses
In getting the test current waveform on the reactor to be measured.
Surveyed the invention provides a kind of using the iron-core reactor turn-to-turn defect of power electronics frequency conversion and power conversion technology
Electrical verification road, the frequency conversion test voltage of predeterminated frequency is exported to the high frequency high voltage transformer, variable-frequency electric using variable-frequency power sources module
The frequency conversion test voltage of source module output predeterminated frequency boosts to test voltage value by high frequency high voltage transformer, and sets with treating
Reactor compensation capacitor in parallel is surveyed to compensate inductance current, reactor to be measured is arranged on to the high pressure of high frequency high voltage transformer
Side, the iron core for taking the reactor to be measured by improving Frequency Patterns do not occur saturation, solve current lightning impulse
The result of experiment is relevant with the turn insulation of iron-core reactor, but can only enter the examination of ripple end to winding, and test voltage is far high
In industrial frequency withstand voltage peak value, result in lightning impulse test can not be carried out effectively to the turn-to-turn defect in the middle part of iron-core reactor winding
The technical problem of test, impulse hunting pressure test available for air reactor turn insulation detect, but iron-core reactor due to
The problems such as less number of turn and core sataration be present, turn insulation experiment can not use the test method of air reactor, result in
The technical problem of saturation unshakable in one's determination can not be ensured not occur under 2 times of fundamental wave rated voltages.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the structural representation of one embodiment that a kind of iron-core reactor turn-to-turn defect provided by the invention tests circuit
Figure；
Fig. 2 is that a kind of flow of one embodiment of iron-core reactor turn-to-turn defect testing method provided by the invention is illustrated
Figure；
Wherein, reference is as follows：
K1, threephase switch；M1, variable-frequency power sources module；T1, high frequency high voltage transformer；Lx, reactor to be measured；M2, data are adopted
Collect module；M3, high-voltage bleeder；C1, compensation capacitor；TA1, the first current sensor；TA2, the second current sensor；Z1、
First delay impedance；Z2, the second delay impedance；Z3, the 3rd delay impedance.
Embodiment
The embodiments of the invention provide a kind of iron-core reactor turn-to-turn defect to test circuit, solves existing reactance unshakable in one's determination
Device turn-to-turn defect testing method, including lightning impulse test, impulse hunting pressure test etc., wherein, the knot of lightning impulse test
Fruit is relevant with the turn insulation of iron-core reactor, but can only enter the examination of ripple end to winding, and test voltage is resistance to far above power frequency
Voltage crest value, it result in the skill that lightning impulse test can not be effectively test the turn-to-turn defect in the middle part of iron-core reactor winding
Art problem, impulse hunting pressure test detects available for air reactor turn insulation, but iron-core reactor is due to the number of turn being present
The problems such as less and core sataration, turn insulation experiment can not use the test method of air reactor, and result in ensure
The technical problem of saturation unshakable in one's determination does not occur under 2 times of fundamental wave rated voltages.
To enable goal of the invention, feature, the advantage of the present invention more obvious and understandable, below in conjunction with the present invention
Accompanying drawing in embodiment, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that disclosed below
Embodiment be only part of the embodiment of the present invention, and not all embodiment.Based on the embodiment in the present invention, this area
All other embodiment that those of ordinary skill is obtained under the premise of creative work is not made, belongs to protection of the present invention
Scope.
Referring to Fig. 1, a kind of iron-core reactor turn-to-turn defect test circuit provided in an embodiment of the present invention, including：
Variable-frequency power sources module M1, high frequency high voltage transformer T1, reactor Lx to be measured, data acquisition module M2, high pressure partial pressure
Device M3, compensation capacitor C1, the first current sensor TA1 and the second flow sensor TA2；
Variable-frequency power sources module M1 input electrically connects with mains supply inlet wire, variable-frequency power sources module M1 output end and height
Frequency high-tension transformer T1 side electrical connection, for exporting the frequency conversion test voltage of predeterminated frequency to high frequency high voltage transformer T1；
In actual implementation process, variable-frequency power sources module M1 can export the frequency conversion experiment electricity of specific frequency as needed
Pressure；
First end of the high frequency high voltage transformer T1 opposite side respectively with reactor Lx to be measured electrically connects, default for applying
Test voltage value to reactor Lx to be measured, wherein, connecting node is first node, reactor Lx to be measured the second end and circuit
Ground potential connects；
Variable-frequency power sources module M1 is connected with high frequency high voltage transformer T1, and variable-frequency power sources module M1 exports the frequency conversion of specific frequency
Voltage boosts to test voltage value by high frequency high voltage transformer T1；
Compensation capacitor C1 one end is connected with first node, and the other end of compensating electric capacity and the ground potential of circuit connect；
Compensation capacitor C1 is used for the inductance current needed for reactor Lx to be measured, reduces high frequency high voltage transformer T1 output
Electric current and capacity；
High-voltage bleeder M3 input is connected on first node；
First current sensor TA1 and the second flow sensor TA2 is separately positioned on reactor Lx to be measured first end and
On two ends；
Data acquisition module M2 electrically connects with high-voltage bleeder M3 output end, for getting high frequency high voltage transformer T1
Output voltage values；
Data acquisition module M2 electrically connects with the first current sensor TA1 and the second flow sensor TA2 respectively, for obtaining
Test current waveform onto reactor Lx to be measured.
It is provided in an embodiment of the present invention a kind of using power electronics frequency conversion and the iron-core reactor turn-to-turn of power conversion technology
Defect tests circuit, and the frequency conversion test voltage of predeterminated frequency is exported to high frequency high voltage transformer T1 using variable-frequency power sources module M1,
The frequency conversion test voltage of variable-frequency power sources module M1 output predeterminated frequencies boosts to test voltage value by high frequency high voltage transformer T1,
And set the compensation capacitor C1 in parallel with reactor Lx to be measured to compensate inductance current, reactor Lx to be measured is arranged on high frequency
High-tension transformer T1 high-pressure side, the iron core for taking the reactor Lx to be measured by improving Frequency Patterns are not satisfied
With it is relevant with the turn insulation of iron-core reactor to solve the result of current lightning impulse test, but can only enter ripple end to winding
Examination, and test voltage is far above industrial frequency withstand voltage peak value, and result in lightning impulse test can not be in iron-core reactor winding
The technical problem that the turn-to-turn defect in portion is effectively test, impulse hunting pressure test are examined available for air reactor turn insulation
Survey, but iron-core reactor can not use hollow electricity due to the problems such as less number of turn and core sataration, turn insulation experiment be present
The test method of anti-device, it result in the technical problem that can not ensure that saturation unshakable in one's determination does not occur under 2 times of fundamental wave rated voltages.
Above is the description that the one embodiment for testting a kind of iron-core reactor turn-to-turn defect circuit is carried out, below will be right
A kind of another embodiment of iron-core reactor turn-to-turn defect test circuit is described in detail.
Referring to Fig. 1, a kind of iron-core reactor turn-to-turn defect test circuit provided in an embodiment of the present invention, including：
Variable-frequency power sources module M1, high frequency high voltage transformer T1, reactor Lx to be measured, data acquisition module M2, high pressure partial pressure
Device M3, compensation capacitor C1, the first current sensor TA1 and the second flow sensor TA2；
Variable-frequency power sources module M1 input electrically connects with mains supply inlet wire, variable-frequency power sources module M1 output end and height
Frequency high-tension transformer T1 side electrical connection, for exporting the frequency conversion test voltage of predeterminated frequency to high frequency high voltage transformer T1；
First end of the high frequency high voltage transformer T1 opposite side respectively with reactor Lx to be measured electrically connects, default for applying
Test voltage value to reactor Lx to be measured, wherein, connecting node is first node, reactor Lx to be measured the second end and circuit
Ground potential connects；
Compensation capacitor C1 one end is connected with first node, and the other end of compensating electric capacity and the ground potential of circuit connect；
High-voltage bleeder M3 input is connected on first node；
First current sensor TA1 and the second flow sensor TA2 is separately positioned on reactor Lx to be measured first end and
On two ends；
Data acquisition module M2 electrically connects with high-voltage bleeder M3 output end, for getting high frequency high voltage transformer T1
Output voltage values；
Data acquisition module M2 electrically connects with the first current sensor TA1 and the second flow sensor TA2 respectively, for obtaining
Test current waveform onto reactor Lx to be measured.
Further, in addition to：
Threephase switch K1, threephase switch K1 are connected between mains supply inlet wire and variable-frequency power sources module M1 input.
Mains supply inlet wire is connected with threephase switch K1, and threephase switch K1 will detect hookup to be isolated with power inleting terminal
Open, for making hookup deenergization.
Further, high-voltage bleeder M3 includes：
First resistor, second resistance, the first electric capacity and the second electric capacity；
First resistor and the first electric capacity are in parallel, form the first bleeder circuit；
Second resistance and the second electric capacity are in parallel, form the second bleeder circuit；
One end of first bleeder circuit is connected with one end of the second bleeder circuit, wherein, connecting node is section point；
The other end of first bleeder circuit is high-voltage bleeder M3 input, and section point is the defeated of high-voltage bleeder M3
Go out end, the other end of the second bleeder circuit and the ground potential of circuit connect.
Further, in addition to：First delay impedance Z1 and the second delay impedance Z2；
First delay impedance Z1 is connected between the first current sensor TA1 and data acquisition module M2, the second delay resistance
Anti- Z2 is connected between the second flow sensor TA2 and data acquisition module M2.
Further, in addition to：
3rd delay impedance Z3；
3rd delay impedance Z3 is connected between high-voltage bleeder M3 output end and data acquisition module M2.
Above is the description that another embodiment for testting a kind of iron-core reactor turn-to-turn defect circuit is carried out, below will
A kind of one embodiment of iron-core reactor turn-to-turn defect testing method is described in detail.
Referring to Fig. 2, a kind of iron-core reactor turn-to-turn defect testing method provided in an embodiment of the present invention, including：
201：First predeterminated frequency is calculated according to the first preset formula, the first preset formula is：
Wherein, fxFor the first predeterminated frequency, LxFor reactor Lx to be measured reactance value, C1For compensation capacitor C1 electric capacity
Value.
202：Variable-frequency power sources module M1 exports the frequency conversion test voltage of the first predeterminated frequency to high frequency high voltage transformer T1；
203：High frequency high voltage transformer T1 outputs first preset test voltage to reactor Lx to be measured；
204：Data acquisition module M2 gets the first test current waveform on reactor Lx to be measured；
205：Denoising is obtained by Denoising Algorithm according to the first test current waveform and tests current waveform；
206：Judge that denoising test current waveform whether there is modulus maximum；
207：If so, then there is turn-to-turn defect, the default experiment electricity of high frequency high voltage transformer T1 outputs second in iron-core reactor
Reactor Lx to be measured is pressed onto, wherein the second default test voltage and the first default test voltage there are time difference Δ t；
208：Data acquisition module M2 gets the second test current waveform on reactor Lx to be measured；
209：It is calculated that arcing distance is poor, and the second preset formula is according to the second preset formula：
lx=v × Δ t；
Wherein, lxPoor for arcing distance, v is the velocity of discharge；
210：If it is not, then turn-to-turn defect is not present in iron-core reactor.
Described above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to before
Embodiment is stated the present invention is described in detail, it will be understood by those within the art that：It still can be to preceding
State the technical scheme described in each embodiment to modify, or equivalent substitution is carried out to which part technical characteristic；And these
Modification is replaced, and the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a kind of iron-core reactor turn-to-turn defect tests circuit, its feature is, including：
Variable-frequency power sources module, high frequency high voltage transformer, reactor to be measured, data acquisition module, high-voltage bleeder, compensating electric capacity
Device, the first current sensor and the second current sensor；
The input of the variable-frequency power sources module electrically connects with mains supply inlet wire, the output end of the variable-frequency power sources module and institute
The side electrical connection of high frequency high voltage transformer is stated, for exporting the frequency conversion test voltage of predeterminated frequency to the high-frequency and high-voltage transformation
Device；
First end of the opposite side of the high frequency high voltage transformer respectively with the reactor to be measured electrically connects, default for applying
Test voltage value to the reactor to be measured, wherein, connecting node is first node, the second end of the reactor to be measured and electricity
The ground potential connection on road；
One end of the compensation capacitor is connected with the first node, the other end of the compensating electric capacity and the ground potential of circuit
Connection；
The input of the high-voltage bleeder is connected on the first node；
First current sensor and second current sensor be separately positioned on reactor to be measured the first end and
On second end；
The data acquisition module electrically connects with the output end of the high-voltage bleeder, for getting the high-frequency and high-voltage transformation
The output voltage values of device；
The data acquisition module electrically connects with first current sensor and second current sensor respectively, for obtaining
Get the test current waveform on the reactor to be measured.
2. iron-core reactor turn-to-turn defect according to claim 1 tests circuit, it is characterised in that also includes：
Threephase switch, the threephase switch be connected to the mains supply inlet wire and the variable-frequency power sources module input it
Between.
A kind of 3. iron-core reactor turn-to-turn defect test circuit according to claim 2, it is characterised in that the high pressure point
Depressor includes：
First resistor, second resistance, the first electric capacity and the second electric capacity；
The first resistor and first electric capacity are in parallel, form the first bleeder circuit；
The second resistance and second electric capacity are in parallel, form the second bleeder circuit；
One end of first bleeder circuit is connected with one end of second bleeder circuit, wherein, connecting node is the second section
Point；
The other end of first bleeder circuit is the input of the high-voltage bleeder, and the section point is the high pressure point
The output end of depressor, the other end of second bleeder circuit and the ground potential of circuit connect.
4. iron-core reactor turn-to-turn defect according to claim 3 tests circuit, it is characterised in that also includes：First prolongs
When impedance and the second delay impedance；
First delay impedance is connected between first current sensor and the data acquisition module, and described second prolongs
When impedance be connected between second current sensor and the data acquisition module.
5. iron-core reactor turn-to-turn defect according to claim 4 tests circuit, it is characterised in that also includes：
3rd delay impedance；
3rd delay impedance is connected between the output end of the high-voltage bleeder and the data acquisition module.
6. a kind of iron-core reactor turn-to-turn defect testing method, including：
Variable-frequency power sources module exports the frequency conversion test voltage of the first predeterminated frequency to the high frequency high voltage transformer；
High frequency high voltage transformer output first presets test voltage to the reactor to be measured；
The data acquisition module gets the first test current waveform on the reactor to be measured；
Judge that the first test current waveform whether there is periodic discharging signal, if so, then the iron-core reactor has circle
Between defect, if it is not, then turn-to-turn defect is not present in the iron-core reactor.
7. iron-core reactor turn-to-turn defect testing method according to claim 6, it is characterised in that variable-frequency power sources module is defeated
Go out the frequency conversion test voltage of the first predeterminated frequency also includes before to the high frequency high voltage transformer：
First predeterminated frequency is calculated according to the first preset formula, first preset formula is：
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<mi>f</mi>
<mi>x</mi>
</msub>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<mrow>
<mn>2</mn>
<mi>&pi;</mi>
<msqrt>
<mrow>
<msub>
<mi>L</mi>
<mi>x</mi>
</msub>
<msub>
<mi>C</mi>
<mn>1</mn>
</msub>
</mrow>
</msqrt>
</mrow>
</mfrac>
<mo>;</mo>
</mrow>
Wherein, fxFor the first predeterminated frequency, LxFor the reactance value of reactor to be measured, C1For the capacitance of compensation capacitor.
8. iron-core reactor turn-to-turn defect testing method according to claim 7, it is characterised in that judge that described first surveys
Examination current waveform whether there is periodic discharging signal, if so, then the iron-core reactor also includes after turn-to-turn defect being present：
The second default test voltage of high frequency high voltage transformer output is to the reactor to be measured, wherein the described second default experiment electricity
Pressure there are time difference Δ t with the described first default test voltage；
The data acquisition module gets the second test current waveform on the reactor to be measured；
It is calculated that arcing distance is poor, and second preset formula is according to the second preset formula：
lx=v × Δ t；
Wherein, lxPoor for arcing distance, v is the velocity of discharge.
9. iron-core reactor turn-to-turn defect according to claim 8 tests circuit, it is characterised in that described to judge described the
One test current waveform specifically includes with the presence or absence of periodic discharging signal：
Denoising is obtained by Denoising Algorithm according to the described first test current waveform and tests current waveform, judges the denoising test
Current waveform whether there is modulus maximum.
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