CN110018404A - Air reactor insulation in-circuit diagnostic system and its diagnostic method - Google Patents
Air reactor insulation in-circuit diagnostic system and its diagnostic method Download PDFInfo
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- CN110018404A CN110018404A CN201910402395.0A CN201910402395A CN110018404A CN 110018404 A CN110018404 A CN 110018404A CN 201910402395 A CN201910402395 A CN 201910402395A CN 110018404 A CN110018404 A CN 110018404A
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- circuit
- carrier arm
- diagnostic system
- current transformer
- air reactor
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- 238000009413 insulation Methods 0.000 title claims abstract description 24
- 238000002405 diagnostic procedure Methods 0.000 title claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 239000013307 optical fiber Substances 0.000 claims abstract description 13
- 238000001228 spectrum Methods 0.000 claims description 28
- 238000005259 measurement Methods 0.000 claims description 15
- 239000004593 Epoxy Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000003750 conditioning effect Effects 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 238000003745 diagnosis Methods 0.000 abstract description 6
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 239000003990 capacitor Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/10—Measuring sum, difference or ratio
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
Air reactor insulation in-circuit diagnostic system and its diagnostic method, belong to the diagnostic system field of air reactor.The present invention provides it is a kind of can early warning, be swift in response, the air reactor insulation in-circuit diagnostic system and its diagnostic method that high sensitivity, accuracy are high.In the present invention, there are carrier axis and carrier arm on air reactor, carrier arm is fixed on carrier axis, the in-circuit diagnostic system that insulate includes sweep frequency power source circuit, detection circuit, current transformer, strapping and optical fiber, current transformer passes through strapping and is fixed on each carrier arm, sweep frequency power source circuit and detection circuit are connect with current transformer respectively, and the output end of detection circuit is connect with optical fiber.Present invention is mainly used for the fault diagnosises of air reactor.
Description
Technical field
The invention belongs to the diagnostic system fields of air reactor, and in particular to air reactor insulation in-circuit diagnostic system
And its diagnostic method.
Background technique
Reactor is the important equipment in electric system, and it is short to play the spuious capacity current of compensation, limitation inrush phenomenon, limitation
The effects of road electric current, filtering, wave arrestment.In current electric system, reactor is very widely used, in the type of reactor
In, the use of dry-type air-core reactor accounts for more than half, but its unique structure and feature due to dry-type air-core reactor, makes
It is easy to happen the failures such as local arc electric discharge and insulation damages, turn-to-turn short circuit, runs the stable operation of power grid；Due to positive reason
The working environment of dry-type air-core reactor is complex under condition, is allowed to the probability to break down increase, and due to reactor
Manufacture threshold is lower, and the producer's quantity for manufacturing reactor is more, and material used also differs larger, is easy to cause reactor
There is the problems such as quality problems, the common failure of dry-type air-core reactor mainly has hot-spot, turn-to-turn insulation damage, leakage field to lead
Surrounding metal component, grounded screen, the high-voltage board of cause are inscribed failures, the existing diagnostic systems such as line terminals loss and fever and mainly lack
Falling into is just to come out problem detection after reactor generation problem, at this time often burns reactor.
It is therefore desirable to it is a kind of can judge in advance, be swift in response, the air reactor insulation that high sensitivity, accuracy are high
In-circuit diagnostic system and its diagnostic method.
Summary of the invention
The present invention cannot judge in advance for existing diagnostic system, react compared with the defect slow, sensitivity is low, accuracy is low,
Provide it is a kind of can judge in advance, be swift in response, the air reactor insulation in-circuit diagnostic system that high sensitivity, accuracy are high and
Its diagnostic method.
Air reactor insulation in-circuit diagnostic system according to the present invention and its technical solution of diagnostic method are as follows:
Air reactor according to the present invention insulate in-circuit diagnostic system, has carrier axis and star on the air reactor
Boom, the carrier arm are fixed on carrier axis, the insulation in-circuit diagnostic system include sweep frequency power source circuit, detection circuit,
Current transformer, strapping and optical fiber, the current transformer pass through strapping and are fixed on each carrier arm, the frequency sweep
Power circuit and detection circuit are connect with current transformer respectively, and the output end of the detection circuit is connect with optical fiber.
Further: the sweep frequency power source circuit includes rectification module, inverter module, switch and power supply, and the electric current is mutual
Sensor is successively connect with rectification module, inverter module, switch and power supply.
Further: the detection circuit includes conditioning circuit, maximum value selecting circuit, A/D converter, CPU and photoelectricity
Converter, the current transformer successively with conditioning circuit, maximum value selecting circuit, A/D converter, CPU, photoelectric converter and
Optical fiber connection.
Further: it includes rain cover, epoxy plate and insulated electronic bolt, and the rain cover setting is in insulation inline diagnosis
On the outside of system, the epoxy plate is fixed on above rain cover, and the insulated electronic bolt is fixed on epoxy plate, the Current Mutual Inductance
Air gap is provided on device.
Based on the diagnostic method of the described air reactor insulation in-circuit diagnostic system, it the following steps are included:
Step 1: with the frequency spectrum of frequency sweep method measurement distributed parameter system, by the switch for controlling each sweep frequency power source circuit
The state of carrier arm is controlled, when the switch is closed, current carrier arm is swept-frequency signal input state, when the switches are opened,
Current carrier arm is detecting state；
Step 2: the switch for the sweep frequency power source circuit being closed on any one carrier arm, the switch on remaining carrier arm is disconnected
It opens, the sweep frequency power source circuit is used to input swept-frequency signal to current transformer, and the detection circuit on remaining carrier arm is used for
Detect the current spectral of current transformer；
Step 3: the carrier arm of replacement input swept-frequency signal, repeats step 2, when low-limit frequency injection, record respectively
Other detection star arm electric current ratios when different star arms inject, record original signal spectrum；
Step 4: repeating step 2 and step 3, actual measurement frequency spectrum is obtained；
Step 5: actual measurement frequency spectrum is compared with original signal spectrum, coil is judged according to the variation of extreme value number and position
Distribution parameter variation concludes whether reactor winding occurs event than the variation with original signal spectrum electric current ratio according to actual measurement frequency spectrum electric current
Barrier.
Air reactor insulation in-circuit diagnostic system according to the present invention and its beneficial effect of diagnostic method are:
Air reactor insulation in-circuit diagnostic system and its diagnostic method, this system according to the present invention are empty according to diagnosis
Whether core device coil distribution parameter changes, to prejudge whether disconnected reactor breaks down before failure；Pre- judgement
So that user has the enough processing time, to avoid the generation of accident；Since the distribution parameter of each encapsulating is not identical, and
Regular difference on frequency spectrum, thus the pre- judgement of encapsulating can be navigated to by inline diagnosis；It can be by detecting air reactor
Whether the current distribution of carrier arm, which changes, judges whether the insulation of air reactor changes and puncture.This system has anticipation
Disconnected function, the electric current by detecting star arm compare, it can be learnt that parameter is either with or without changing, current and electric current occurs one
It after fixed variation, that is, can conclude that distribution parameter is changed, power off in time, reactor is repaired.
Detailed description of the invention
Fig. 1 is the main view of air reactor inline diagnosis；
Fig. 2 is the cross-sectional view of air reactor inline diagnosis shown in FIG. 1；
Fig. 3 is sweep frequency power source scheme of installation；
Fig. 4 is the scheme of installation of optical fiber；
Fig. 5 is the circuit diagram of sweep frequency power source circuit；
Fig. 6 is the circuit diagram of detection circuit；
Fig. 7 is the functional block diagram for receiving signal；
In figure, 1 it is carrier axis, 2 is carrier arm, 3 is sweep frequency power source circuit, 4 is detection circuit, 5 is current transformer, 6
It is optical fiber for strapping, 7,8 be rain cover, 9 be epoxy plate, 10 be insulated electronic bolt, 11 is air gap.
Specific embodiment
Below with reference to embodiment, the following further describes the technical solution of the present invention, and however, it is not limited to this, all right
Technical solution of the present invention is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be contained
Lid is within the protection scope of the present invention.
Embodiment 1
Illustrate the present embodiment in conjunction with Fig. 1-Fig. 7, in the present embodiment, the insulation of air reactor involved in the present embodiment exists
Radiodiagnosis x system has carrier axis 1 and carrier arm 2 on the air reactor, and the carrier arm 2 is fixed on carrier axis 1, described
The in-circuit diagnostic system that insulate includes sweep frequency power source circuit 3, detection circuit 4, current transformer 5, strapping 6 and optical fiber 7, the electricity
Current transformer 5 is fixed on each carrier arm 2 by strapping 6, the sweep frequency power source circuit 3 and detection circuit 4 respectively with
Current transformer 5 connects, and the output end of the detection circuit 4 is connect with optical fiber 7.
More specifically: the sweep frequency power source circuit 2 includes rectification module, inverter module, switch and power supply, the electric current
Mutual inductor 5 is successively connect with rectification module, inverter module, switch and power supply.
More specifically: the detection circuit includes conditioning circuit, maximum value selecting circuit, A/D converter, CPU and light
Electric transducer, the current transformer 5 successively with conditioning circuit, maximum value selecting circuit, A/D converter, CPU, photoelectric conversion
Device and optical fiber 7 connect.
In Fig. 6, maximum value selecting circuit is exactly single tube rectified current, is greater than by the no only ac signal value of diode
0 signal passes through, i.e., the positive axis signal of y, the effect of capacitor are pressure stabilizings in reference axis, flows through the electric current of diode to capacitor
Charging, the value of capacitor be exactly electric current signal peak value, i.e., maximum value, the effect of resistance are timely to consume electric energy, work as stream
When entering the curent change of maximum value selecting circuit, the value on capacitor can also change in time.Photoelectric converter is that electric signal is converted
It is transmitted for optical signal, safe and efficient, which chooses soup lake TH-3100 module.
More specifically: the insulation in-circuit diagnostic system further includes rain cover 8, epoxy plate 9 and insulated electronic bolt 10, institute
The setting of rain cover 8 is stated on the outside of insulation in-circuit diagnostic system, the epoxy plate 9 is fixed on 8 top of rain cover, the insulated electronic
Bolt 10 is fixed on epoxy plate 9, is provided with air gap 11 between the current transformer 5 and carrier arm 2.
In Fig. 2, epoxy plate 9 is fixed on reactor by insulated electronic bolt 10, and rain cover 8 is exactly hollow cylinder, rain-proof
Cover 8 is buckled on epoxy plate 9.Reactor is made of coil winding, and equivalent circuit is capacitor, made of resistance, inductance are series-parallel,
The distribution parameter of equivalent circuit is fixed, i.e. many capacitors, resistance, inductance value be exactly it is certain, when reactance occurs
Device encapsulating water inlet, reactor winding deformation occurs with reactor inside exist put when, these capacitors, resistance, inductance value just send out
Change is given birth to, then the equivalent frequency of system is also changed, and the maximum value of electric current is also changed, at this time distribution parameter
(i.e. capacitor, inductance, resistance value) is changed, i.e., above-mentioned reason occurs in reactor.The top and the bottom of air gap 11 are exactly coiling
The two half-unit of current transformer magnet point, the coil of lower part is current transformer.Internal cuboid is the center of reactor
The supporting leg of axis and air reactor.Cuboid is that magnetic material is done, and is that can cause magnet when star arm has alternating current to flow through
Interior changes of magnetic field, and then be wrapped in the coil on magnet and can also induce electric current；When sweep frequency power source issue electric current flow through it is above-mentioned
Coil, can also cause the intracorporal changes of magnetic field of magnetic, star arm can also incude the symmetrical electric current in place.
Based on the diagnostic method of the described air reactor insulation in-circuit diagnostic system, it the following steps are included:
Step 1: with the frequency spectrum of frequency sweep method measurement distributed parameter system, by the switch for controlling each sweep frequency power source circuit 3
The state of carrier arm 2 is controlled, when the switch is closed, current carrier arm 2 is swept-frequency signal input state, when switch disconnects
When, current carrier arm 2 is detecting state；
The switch Step 2: switch for the sweep frequency power source circuit 3 being closed on any one carrier arm 2, on remaining carrier arm 2
It disconnects, the sweep frequency power source circuit 3 is used to input swept-frequency signal, the detection circuit on remaining carrier arm 2 to current transformer 5
4 for detecting the current spectral of current transformer 5；
Step 3: the carrier arm 2 of replacement input swept-frequency signal, repeats step 2, when low-limit frequency injection, record respectively
Other detection star arm electric current ratios when different star arms inject, record original signal spectrum；
Step 4: repeating step 2 and step 3, actual measurement frequency spectrum is obtained；
Step 5: actual measurement frequency spectrum is compared with original signal spectrum, coil is judged according to the variation of extreme value number and position
Distribution parameter variation concludes whether reactor winding occurs event than the variation with original signal spectrum electric current ratio according to actual measurement frequency spectrum electric current
Barrier.
The determination of distribution parameter: with frequency sweep method measurement distributed parameter system frequency spectrum, record original signal spectrum, actual measurement frequency spectrum with
Original signal spectrum is compared, and when significant change occurs for extreme value number and position, can conclude that coil distribution parameter changes.Coil
Deformation occurs puts with reactor inside with the presence of: reactor encapsulating water inlet, reactor winding for the reason of distribution parameter changes
Electricity.Therefore, certain coil insulation status can be diagnosed to air reactor distribution parameter spectrum measurement.
Frequency sweeping method: since air reactor uses multiple branch circuit parallel-connection structure, in order to enable circulation is smaller and uses score
Circle, the method for realizing fractional turns are multi-arm carrier；Thus swept-frequency signal, i.e. signal f can be injected from some star arm of carrier
(t)=sin (k ω t2), i.e., contain the current signal of each frequency in frequency domain, and frequency spectrum is detected from remaining carrier；Injection end
(in turn) progress can be recycled on the star arm of carrier.
By taking some carrier arm as an example, star arm is injected as swept-frequency signal when K closes the carrier arm, and when K opening, then become
Detect star arm；Low-limit frequency inject when, record respectively different star arms injection when other detection star arm electric current ratios, when electric current ratio with
When electric current ratio has significant change with early period, it can conclude that reactor winding has occurred and that failure.
By the value obtained on maximum value selecting circuit, i.e., the signal in a upper period and the signal in this period compare,
Data so at first are just given up, by the signal contrast of the signal in a upper period and this period, the signal in current rear period
When the deviation of appearance is greater than certain value, output fault-signal shows pre- judgement.
Claims (5)
- The in-circuit diagnostic system 1. air reactor insulate, has carrier axis (1) and carrier arm (2) on the air reactor, described Carrier arm (2) is fixed on carrier axis (1), which is characterized in that the insulation in-circuit diagnostic system includes sweep frequency power source circuit (3), detection circuit (4), current transformer (5), strapping (6) and optical fiber (7), the current transformer (5) is by tying up Band (6) is fixed on each carrier arm (2), the sweep frequency power source circuit (3) and detection circuit (4) respectively with current transformer (5) it connects, the output end of the detection circuit (4) is connect with optical fiber (7).
- The in-circuit diagnostic system 2. air reactor according to claim 1 insulate, which is characterized in that the sweep frequency power source electricity Road (2) includes rectification module, inverter module, switch and power supply, the current transformer (5) successively with rectification module, inversion mould Block, switch are connected with power supply.
- The in-circuit diagnostic system 3. air reactor according to claim 1 insulate, which is characterized in that the detection circuit packet Include conditioning circuit, maximum value selecting circuit, A/D converter, CPU and photoelectric converter, the current transformer (5) successively with tune Manage circuit, maximum value selecting circuit, A/D converter, CPU, photoelectric converter and optical fiber (7) connection.
- The in-circuit diagnostic system 4. air reactor according to claim 1 insulate, which is characterized in that it further includes rain cover (8), epoxy plate (9) and insulated electronic bolt (10), rain cover (8) setting is on the outside of insulation in-circuit diagnostic system, the ring Oxygen plate (9) is fixed on above rain cover (8), and the insulated electronic bolt (10) is fixed on epoxy plate (9), the current transformer (5) air gap (11) are provided on.
- 5. the diagnostic method based on air reactor described in claim 1 insulation in-circuit diagnostic system, which is characterized in that it is wrapped Include following steps:Step 1: with the frequency spectrum of frequency sweep method measurement distributed parameter system, by the switch control for controlling each sweep frequency power source circuit (3) The state of carrier arm (2) processed, when the switch is closed, current carrier arm (2) is swept-frequency signal input state, when switch disconnects When, current carrier arm (2) is detecting state；Step 2: the switch for the sweep frequency power source circuit (3) being closed on any one carrier arm (2), opening on remaining carrier arm (2) Shutdown is opened, and the sweep frequency power source circuit (3) is used to input swept-frequency signal to current transformer (5), on remaining carrier arm (2) Detection circuit (4) is used to detect the current spectral of current transformer (5)；Step 3: the carrier arm (2) of replacement input swept-frequency signal, repeats step 2, when low-limit frequency injection, record respectively not With other detection star arm electric current ratios when the injection of star arm, original signal spectrum is recorded；Step 4: repeating step 2 and step 3, actual measurement frequency spectrum is obtained；Step 5: actual measurement frequency spectrum is compared with original signal spectrum, judge that coil is distributed according to the variation of extreme value number and position Parameters variation concludes whether reactor winding breaks down than the variation with original signal spectrum electric current ratio according to actual measurement frequency spectrum electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910402395.0A CN110018404A (en) | 2019-05-15 | 2019-05-15 | Air reactor insulation in-circuit diagnostic system and its diagnostic method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910402395.0A CN110018404A (en) | 2019-05-15 | 2019-05-15 | Air reactor insulation in-circuit diagnostic system and its diagnostic method |
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| CN110018404A true CN110018404A (en) | 2019-07-16 |
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| CN201910402395.0A Pending CN110018404A (en) | 2019-05-15 | 2019-05-15 | Air reactor insulation in-circuit diagnostic system and its diagnostic method |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59230168A (en) * | 1983-06-13 | 1984-12-24 | Fuji Electric Co Ltd | Current measuring circuit of dc converting device |
| CN103792462A (en) * | 2014-01-15 | 2014-05-14 | 国家电网公司 | Power transformer winding turn-to-turn short circuit failure detecting method based on resistance frequency curve |
| CN104485198A (en) * | 2014-06-26 | 2015-04-01 | 国家电网公司 | Air reactor and air reactor current measuring method |
| CN107728020A (en) * | 2017-10-12 | 2018-02-23 | 国家电网公司 | A kind of high voltage capacitive apparatus defect rapid diagnosis system |
| CN108051715A (en) * | 2018-01-08 | 2018-05-18 | 云南电网有限责任公司曲靖供电局 | A kind of air reactor inter-turn insulation defect detecting system and method |
| CN108226699A (en) * | 2018-02-05 | 2018-06-29 | 国网山西省电力公司电力科学研究院 | Dry-type reactor interturn insulation measuring device with electricity and checkout and diagnosis method |
| CN108279359A (en) * | 2018-02-05 | 2018-07-13 | 国网山西省电力公司电力科学研究院 | Dry-type reactor interturn insulation method for diagnosing faults based on frequency response analysis |
| CN208580163U (en) * | 2018-07-12 | 2019-03-05 | 国网山东省电力公司菏泽供电公司 | Power high voltage dry-type air-core reactor on-line intelligence monitors system |
| CN210005631U (en) * | 2019-05-15 | 2020-01-31 | 哈尔滨理工大学 | Insulation online diagnosis system for air-core reactor |
-
2019
- 2019-05-15 CN CN201910402395.0A patent/CN110018404A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59230168A (en) * | 1983-06-13 | 1984-12-24 | Fuji Electric Co Ltd | Current measuring circuit of dc converting device |
| CN103792462A (en) * | 2014-01-15 | 2014-05-14 | 国家电网公司 | Power transformer winding turn-to-turn short circuit failure detecting method based on resistance frequency curve |
| CN104485198A (en) * | 2014-06-26 | 2015-04-01 | 国家电网公司 | Air reactor and air reactor current measuring method |
| CN107728020A (en) * | 2017-10-12 | 2018-02-23 | 国家电网公司 | A kind of high voltage capacitive apparatus defect rapid diagnosis system |
| CN108051715A (en) * | 2018-01-08 | 2018-05-18 | 云南电网有限责任公司曲靖供电局 | A kind of air reactor inter-turn insulation defect detecting system and method |
| CN108226699A (en) * | 2018-02-05 | 2018-06-29 | 国网山西省电力公司电力科学研究院 | Dry-type reactor interturn insulation measuring device with electricity and checkout and diagnosis method |
| CN108279359A (en) * | 2018-02-05 | 2018-07-13 | 国网山西省电力公司电力科学研究院 | Dry-type reactor interturn insulation method for diagnosing faults based on frequency response analysis |
| CN208580163U (en) * | 2018-07-12 | 2019-03-05 | 国网山东省电力公司菏泽供电公司 | Power high voltage dry-type air-core reactor on-line intelligence monitors system |
| CN210005631U (en) * | 2019-05-15 | 2020-01-31 | 哈尔滨理工大学 | Insulation online diagnosis system for air-core reactor |
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