CN107741555A - Switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform generating means - Google Patents
Switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform generating means Download PDFInfo
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- CN107741555A CN107741555A CN201710953183.2A CN201710953183A CN107741555A CN 107741555 A CN107741555 A CN 107741555A CN 201710953183 A CN201710953183 A CN 201710953183A CN 107741555 A CN107741555 A CN 107741555A
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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
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
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Abstract
The present invention relates to a kind of switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform generating means, including power module, characteristic pulse to occur module, signal output and load blocks and battery；The present invention reduces the probability of malfunction of circuit devcie, the reliability of system is improved；The present invention makes breakdown judge accurate, easy, directly perceived；The present invention is non-destructive testing method；The present invention provides solid, objective data basis for switchgear divide-shut brake coil turn-to-turn insulation tube arrester；The present invention have the characteristics that it is safe, portable, flexible with it is accurate, solve the problems, such as that signature waveform produces in current switch equipment divide-shut brake coil turn-to-turn insulation tube arrester, the technical merit of association area is improved, compensate for the deficiency of detection technique in actual applications.
Description
Technical field
The invention belongs to Electric Power Equipment Insulation detection technique and its application field, more particularly to switchgear division brake cable
Enclose turn-to-turn insulation fault diagnosis signature waveform generating means.
Background technology
The divide-shut brake action of switchgear is typically that divide-shut brake coil electricity moves iron core after action command is sent,
The sincere sub- dropout of divide-shut brake is triggered to complete.Switchgear coil is because processing technology is bad, the arrangement of technique for coiling defect, turn-to-turn is mixed
The reason such as random, can cause the insulation between wire turn to reduce or even turn-to-turn short circuit, i.e. coil turn-to-turn short circuit failure occur.Turn-to-turn short circuit event
Magnetic force caused by coil reduces after barrier will cause to send switchgear action command, and electric current increases during coil adhesive, will when serious
It can not normally complete point, closing operation, or even cause coil heating until burning because long-time is powered, proximity switch equipment tripping
Catastrophe failure.According to statistics, similar fault case in system in inlet switch equipment manufacturer and domestic switchgear producer
Occur a lot of, serious threat is caused to power network and equipment safety operation.Switchgear divide-shut brake action be typically send it is dynamic
After ordering, divide-shut brake coil electricity moves iron core, triggers the sincere sub- dropout of divide-shut brake to complete.Switchgear coil is due to adding
The reasons such as work technique is bad, technique for coiling defect, turn-to-turn fall into disarray, the insulation between wire turn can be caused to reduce or even turn-to-turn occur
Short circuit, i.e. coil turn-to-turn short circuit failure.Shorted-turn fault will cause to send magnetic caused by coil after switchgear action command
Power reduces, and electric current increases during coil adhesive, will be unable to normally complete when serious point, closing operation, or even because energization for a long time is led
Induced coil heating the catastrophe failure of proximity switch equipment tripping, serious prestige is caused to power network and equipment safety operation up to burning
The side of body.
The detection of switching devices coil has the scholar of Beijing Jiaotong University at present, and extreme value is sought using wavelet analysis and time domain
The method that is combined of point obtains high-tension switch gear divide-shut brake coil current signal characteristic value, and according to this feature value to switch
The fault distinguishing method of equipment is studied.Article is thought, in the splitting or integrating operating process of high-tension switch gear, coil current
Any change be all motion details unshakable in one's determination real picture, include abundant letter in the current waveform of d-c solenoid
Breath.The movement travel of iron core is can be appreciated that according to coil current waveform, the feature according to current waveform and current signal can determine whether iron
Heart motion with the presence or absence of clamping stagnation, thread off, refuse point, refuse phenomena such as conjunction.The technology using current sensor due to obtaining coil working
Current waveform, breakdown judge is realized according to current characteristic, exist easily is made by live noise jamming, characteristic quantity difficult judgment, scene
The shortcomings of with inconvenience.It is exactly in addition to use acting characteristic measuring technology, switching devices are integrally detected.But acting characteristic
Hour hands switching devices overall permanence is detected, emphasis is not examined in switchgear coil body, technological means with repetition pulse
Survey technology is entirely different.
In addition, the invention A of CN 105277835 provide a kind of coil form power equipment interturn short-circuit failure diagnosing feature and carried
Take device and analysis system and device.The A of patent of invention CN 106569080 disclose a kind of transformation based on low voltage pulse signal
Device shorted-turn fault localization method.It was found from technical characteristic disclosed in above-mentioned patent, it is short that its research emphasis essentially consists in turn-to-turn
General principle, determination methods and the positioning thinking of road detection.However, in actual applications, it is completely the same how to produce two-way
Waveform is a problem, because in actual applications, those skilled in the art know, either using DDS or transformer coupling
The modes such as conjunction, all can not accurately produce the consistent pulse of two-way, particularly in high frequency, it is easier to produce High-frequency Interference so that
There is error in the two paths of signals that impulse generator exports in itself, cause breakdown judge deviation occur.
In summary, existing switchgear divide-shut brake coil turn-to-turn insulation failure detection method exist certain limitation and
Deficiency, the research emphasis of current detection technology is mainly focused on the means and diagnostic method of Site Detection, for detecting instrument sheet
Achievement in research in terms of body performance boost is less.The problem for how producing the completely the same waveform of two-way is not yet resolved, it is real
Border scene needs a kind of safe, portable, flexible switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform to occur
Device is to solve the above problems.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of safety, just that can obtain exact failure diagnosis detection data
Take, flexible switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform generating means.
In order to solve the above technical problems, the technical solution adopted in the present invention is：A kind of switchgear divide-shut brake coil turn
Between insulation tube arrester signature waveform generating means, it includes power module, module, signal output and load occur for characteristic pulse
Module and battery；The respective input of the output termination power module of the battery；The output termination aspect of the power module
The respective input of pulse generating module；The phase of output the termination signal output and load blocks of module occurs for the characteristic pulse
Answer input.
The power module uses low ripple DC-DC module, and the output voltage of battery is converted into 12V DC power supply, line
Ripple is not more than 20mV, and output current is not less than 3A；The power module includes 1 ~ 4 pin；1 pin of the power module is with 2 pin
The input of power module, 1 pin of power module connect the power output end of battery, and 2 pin of the power module connect connecing for battery
Ground terminal；3 pin and 4 pin of the power module are the output end of power module, and 4 pin of power module are grounded.
Module, which occurs, for the characteristic pulse includes diode D21, diode D22, IGCT S21, electric capacity of voltage regulation C21, limit
The pin of leakage resistance R21, pulse-width regulated electric capacity C22, diode D23, decoupling capacitor C23, the pin of input port 1 ~ 2, pin ~ 4 of output port 3
Pin；The pin of input port 1 of the characteristic pulse generation module connects 3 pin of power module, and the defeated of module occurs for the characteristic pulse
The pin of inbound port 2 connects 4 pin of power module, and the pin of input port 2 that module occurs for characteristic pulse connects the defeated of characteristic pulse generation module
The pin of exit port 4；The electric capacity of voltage regulation C21 is connected in parallel between the pin of the pin of input port 1 ~ 2 that module occurs for characteristic pulse；Two pole
Pipe D21 is connected with diode D22 positive pole, and the diode D21 negative poles connect the pin of input port 1 that module occurs for characteristic pulse,
The diode D22 negative poles connect the pin of input port 2 that module occurs for characteristic pulse；The current-limiting resistance R21 is connected on characteristic pulse
Occur between the pin of input port 1 of module and IGCT S21 positive pole；The pulse-width regulated electric capacity C22 is connected on characteristic pulse hair
Between the pin of input port 2 of raw module and IGCT S21 positive pole；The positive pole of the diode D23 connects IGCT S21 door
Pole, the negative pole of the diode D23 connect IGCT S21 positive pole；The negative pole of the IGCT S21 connects characteristic pulse and module occurs
The pin of output port 3；The decoupling capacitor C23 is connected in parallel between the pin of the pin of output port 3 ~ 4 that module occurs for characteristic pulse.
The signal output includes diode D31, diode D32, IGBT module Q1, IGBT module with load blocks
Q2, resistance R31, resistance R32, diode D33, diode D34, the pin of input port 1 and 2 pin；The signal output and load mould
The pin of input port 1 of block connects the pin of output port 3 that module occurs for characteristic pulse, the input of the signal output and load blocks
2 pin of mouth connect the pin of output port 4 that module occurs for characteristic pulse；The emitter stage of the IGBT module Q1 connects IGBT module Q2 collection
Electrode, the colelctor electrode of the IGBT module Q1 connect the pin of input port 1 of signal output and load blocks, IGBT module Q2 hair
Emitter grounding；Diode D31 positive pole connects the pin of input port 1 of signal output and load blocks, and diode D31 negative pole connects
IGBT module Q1 grid；Diode D32 negative pole meets the pin of input port 1 of signal output and load blocks, diode D32
Positive pole connect IGBT module Q1 grid；Diode D33 is connected in reverse parallel between IGBT module Q1 colelctor electrode and emitter stage,
Diode D34 is connected in reverse parallel between IGBT module Q2 colelctor electrode and emitter stage；Resistance R31 connects with resistance R32 and is followed by
Between signal output and the pin of input port 1 and ground of load blocks, the resistance R31 and resistance R32 node is P；It is tested to open
Equipment coil L31 is closed to be connected between node P and IGBT module Q1 emitter stage.
The beneficial effects of the invention are as follows：Circuit devcie of the present invention is few, reduces the probability of malfunction of circuit devcie, improves and is
The reliability of system；Circuit produces index class pulse, and rising edge is smooth, and in the absence of frequency glitches, and operating personnel are by adjusting arteries and veins
Width regulation electric capacity C22, it is convenient to adjust the index rising edge and trailing edge of high frequency repetition pulse, it is accurate to substantially increase system
Property and staff detection efficiency；The coupled modes employed ensure the uniformity of two-way output pulse, reduce original letter
Error caused by number inconsistent, improves antijamming capability；When carrying out Site Detection using the present invention, breakdown judge is accurate, can
It is accurate to a coil, sensitivity is higher the methods of the test of relatively conventional D.C. resistance, testing mechanical characteristic, and failure is serious
Degree judges easy, directly perceived；Because test voltage amplitude is between 1-10V, and reliable ground during test, therefore neither to switch
Equipment coil has an impact, and does not also produce harm safely to testing staff, is non-destructive testing method；Apparatus of the present invention small volume,
It is in light weight, be convenient for carrying, and analyze it is easy, simple to operate, be adapted to on-the-spot test use.The present invention is mainly from detection means sheet
Body feature is set out, and is conceived to and how to be obtained accurately detection data, so as to be switchgear divide-shut brake coil turn-to-turn insulation fault
Diagnosis provides solid, objective data basis；The present invention have the characteristics that it is safe, portable, flexible with it is accurate, solve and currently open
The problem of signature waveform produces in equipment divide-shut brake coil turn-to-turn insulation tube arrester is closed, improves the technology water of association area
It is flat, it compensate for the deficiency of detection technique in actual applications.
Brief description of the drawings
Fig. 1 is the theory diagram of the present invention.
Fig. 2 is characterized pulse generating module composition schematic diagram.
Fig. 3 is signal output and load blocks composition schematic diagram.
Embodiment
From the embodiment shown in Fig. 1-3, it includes power module, module occurs for characteristic pulse, signal output is with bearing
Carry module and battery；The respective input of the output termination power module of the battery；The output termination of the power module is special
Levy the respective input of pulse generating module；The output termination signal output and load blocks of module occur for the characteristic pulse
Respective input.
The power module uses low ripple DC-DC module, and the output voltage of battery is converted into 12V DC power supply, line
Ripple is not more than 20mV, and output current is not less than 3A；The power module includes 1 ~ 4 pin；1 pin of the power module is with 2 pin
The input of power module, 1 pin of power module connect the power output end of battery, and 2 pin of the power module connect connecing for battery
Ground terminal；3 pin and 4 pin of the power module are the output end of power module, and 4 pin of power module are grounded.
Module, which occurs, for the characteristic pulse includes diode D21, diode D22, IGCT S21, electric capacity of voltage regulation C21, limit
The pin of leakage resistance R21, pulse-width regulated electric capacity C22, diode D23, decoupling capacitor C23, the pin of input port 1 ~ 2, pin ~ 4 of output port 3
Pin；The pin of input port 1 of the characteristic pulse generation module connects 3 pin of power module, and the defeated of module occurs for the characteristic pulse
The pin of inbound port 2 connects 4 pin of power module, and the pin of input port 2 that module occurs for characteristic pulse connects the defeated of characteristic pulse generation module
The pin of exit port 4；The electric capacity of voltage regulation C21 is connected in parallel between the pin of the pin of input port 1 ~ 2 that module occurs for characteristic pulse；Two pole
Pipe D21 is connected with diode D22 positive pole, and the diode D21 negative poles connect the pin of input port 1 that module occurs for characteristic pulse,
The diode D22 negative poles connect the pin of input port 2 that module occurs for characteristic pulse；The current-limiting resistance R21 is connected on characteristic pulse
Occur between the pin of input port 1 of module and IGCT S21 positive pole；The pulse-width regulated electric capacity C22 is connected on characteristic pulse hair
Between the pin of input port 2 of raw module and IGCT S21 positive pole；The positive pole of the diode D23 connects IGCT S21 door
Pole, the negative pole of the diode D23 connect IGCT S21 positive pole；The negative pole of the IGCT S21 connects characteristic pulse and module occurs
The pin of output port 3；The decoupling capacitor C23 is connected in parallel between the pin of the pin of output port 3 ~ 4 that module occurs for characteristic pulse.
The signal output includes diode D31, diode D32, IGBT module Q1, IGBT module with load blocks
Q2, resistance R31, resistance R32, diode D33, diode D34, the pin of input port 1 and 2 pin；The signal output and load mould
The pin of input port 1 of block connects the pin of output port 3 that module occurs for characteristic pulse, the input of the signal output and load blocks
2 pin of mouth connect the pin of output port 4 that module occurs for characteristic pulse；The emitter stage of the IGBT module Q1 connects IGBT module Q2 collection
Electrode, the colelctor electrode of the IGBT module Q1 connect the pin of input port 1 of signal output and load blocks, IGBT module Q2 hair
Emitter grounding；Diode D31 positive pole connects the pin of input port 1 of signal output and load blocks, and diode D31 negative pole connects
IGBT module Q1 grid；Diode D32 negative pole meets the pin of input port 1 of signal output and load blocks, diode D32
Positive pole connect IGBT module Q1 grid；Diode D33 is connected in reverse parallel between IGBT module Q1 colelctor electrode and emitter stage,
Diode D34 is connected in reverse parallel between IGBT module Q2 colelctor electrode and emitter stage；Resistance R31 connects with resistance R32 and is followed by
Between signal output and the pin of input port 1 and ground of load blocks, the resistance R31 and resistance R32 node is P；It is tested to open
Equipment coil L31 is closed to be connected between node P and IGBT module Q1 emitter stage.The test voltage amplitude of module output is in 1-
Between 10V, much smaller than the minimum voltage action of switchgear.
The model BT169 of the IGCT S21.The model of the IGBT module Q1 and IGBT module Q2 is
FQD2N100。
The technical characterstics such as characteristic pulse of the present invention mainly from detection means in itself produces, characteristic pulse is chosen,
How eye is in obtain accurately detection data, so as to provide solid, objective data basis for fault diagnosis.
The present invention provides switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform generating means, has peace
Entirely, the features such as portable, flexible and accurate, solves the inspection of current switch equipment divide-shut brake coil turn-to-turn insulation fault no pulse technology
The problem of survey, the technical merit of association area is improved, compensate for the deficiency of detection technique in actual applications.
The battery of the present invention is chargeable lithium cell, and lithium battery interior includes protection module, can complete the overcharging of battery, mistake
Put protection, cell output voltage 16.8V.Power module uses low ripple DC-DC module, battery can be inputted into battery and is converted into
12V DC power supply, ripple are not more than 20mV, and output current is not less than 3A.
The method of fault diagnosis comprises the following steps：
The impulse response waveform of switchgear divide-shut brake coil one end is gathered, is named as signal 1；Gather switchgear division brake cable
The impulse response waveform of the other end is enclosed, is named as signal 2；Signal 1 seeks difference with signal 2, and difference signal name is characterized
Signal, when the amplitude of characteristic signal has shorted-turn fault more than 300mV, then judgement.The present invention creatively solves
Switchgear divide-shut brake coil turn-to-turn insulation failure detection scene, repetition pulse is conveniently adjusted by pulse-width regulated electric capacity C22
The circuit parameter of generating unit, the forward position and rear edge for realizing high frequency repetition pulse are adjusted, and improve Site Detection effect and positioning
Precision.
The present invention can produce the pulse of Microsecond grade forward position, and modular circuit parameter can occur by characteristic pulse and be conveniently adjusted
Pulse amplitude, pulse frequency and pulse front edge.When the present invention is used for the detection of switchgear divide-shut brake coil turn-to-turn insulation fault,
The response impulse at switchgear divide-shut brake coil both ends can accurately be obtained.Response impulse is located under same time coordinate system
Reason, can obtain signature waveform.By signature waveform when coil is normal with failure when change, can determine whether coil whether have therefore
Barrier.Meanwhile by calculating the initial time of signature waveform, can also position-sensing switch equipment divide-shut brake coil turn-to-turn short circuit position.This
The Site Detection invented as switchgear divide-shut brake coil provides quick, reliable, safe detection means.
Claims (6)
- A kind of 1. switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform generating means, it is characterised in that：Including Module, signal output and load blocks and battery occur for power module, characteristic pulse；The output termination power module of the battery Respective input；The respective input of module occurs for the output termination characteristic pulse of the power module；The characteristic pulse The output termination signal output of module and the respective input of load blocks occurs.
- 2. a kind of switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform according to claim 1 fills Put, it is characterised in that：The power module uses low ripple DC-DC module, and the output voltage of battery is converted into 12V DC electricity Source, ripple are not more than 20mV, and output current is not less than 3A；The power module includes 1 ~ 4 pin；1 pin of the power module and 2 Pin is the input of power module, and 1 pin of power module connects the power output end of battery, and 2 pin of the power module connect battery Earth terminal；3 pin and 4 pin of the power module are the output end of power module, and 4 pin of power module are grounded.
- 3. a kind of switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform according to claim 2 fills Put, it is characterised in that：Module, which occurs, for the characteristic pulse includes diode D21, diode D22, IGCT S21, electric capacity of voltage regulation The pin of C21, current-limiting resistance R21, pulse-width regulated electric capacity C22, diode D23, decoupling capacitor C23, the pin of input port 1 ~ 2, output end The pin of mouthful 3 pin ~ 4；The pin of input port 1 of the characteristic pulse generation module connects 3 pin of power module, and mould occurs for the characteristic pulse The pin of input port 2 of block connects 4 pin of power module, and the pin of input port 2 that module occurs for characteristic pulse connects characteristic pulse generation mould The pin of output port 4 of block；The electric capacity of voltage regulation C21 is connected in parallel between the pin of the pin of input port 1 ~ 2 that module occurs for characteristic pulse；Institute The positive pole that diode D21 is stated with diode D22 is connected, and the diode D21 negative poles connect the input that module occurs for characteristic pulse 1 pin of mouth, the diode D22 negative poles connect the pin of input port 2 that module occurs for characteristic pulse；The current-limiting resistance R21 is connected on spy Levy between the pin of input port 1 of pulse generating module and IGCT S21 positive pole；The pulse-width regulated electric capacity C22 is connected on feature Between the pin of input port 2 of pulse generating module and IGCT S21 positive pole；The positive pole of the diode D23 meets IGCT S21 Gate pole, the negative pole of the diode D23 connects IGCT S21 positive pole；The negative pole of the IGCT S21 connects characteristic pulse The pin of output port 3 of module；The decoupling capacitor C23 is connected in parallel between the pin of the pin of output port 3 ~ 4 that module occurs for characteristic pulse.
- 4. a kind of switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform according to claim 3 fills Put, it is characterised in that：The signal output includes diode D31, diode D32, IGBT module Q1, IGBT with load blocks Module Q2, resistance R31, resistance R32, diode D33, diode D34, the pin of input port 1 and 2 pin；The signal output is with bearing Carry module the pin of input port 1 connect characteristic pulse occur module the pin of output port 3, the signal output and load blocks it is defeated The pin of inbound port 2 connects the pin of output port 4 that module occurs for characteristic pulse；The emitter stage of the IGBT module Q1 meets IGBT module Q2 Colelctor electrode, the colelctor electrode of the IGBT module Q1 meets the pin of input port 1 of signal output and load blocks, IGBT module Q2 Grounded emitter；Diode D31 positive pole connects the pin of input port 1 of signal output and load blocks, diode D31 negative pole Connect IGBT module Q1 grid；Diode D32 negative pole connects the pin of input port 1 of signal output and load blocks, diode D32 positive pole connects IGBT module Q1 grid；Diode D33 be connected in reverse parallel in IGBT module Q1 colelctor electrode and emitter stage it Between, diode D34 is connected in reverse parallel between IGBT module Q2 colelctor electrode and emitter stage；After resistance R31 connects with resistance R32 It is connected between signal output and the pin of input port 1 and ground of load blocks, the resistance R31 and resistance R32 node is P；Quilt Slowdown monitoring switch equipment coil L31 is connected between node P and IGBT module Q1 emitter stage.
- 5. a kind of switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform according to claim 4 fills Put, it is characterised in that：The model BT169 of the IGCT S21.
- 6. a kind of switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform according to claim 5 fills Put, it is characterised in that：The model of the IGBT module Q1 and IGBT module Q2 are FQD2N100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710953183.2A CN107741555A (en) | 2017-10-13 | 2017-10-13 | Switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform generating means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710953183.2A CN107741555A (en) | 2017-10-13 | 2017-10-13 | Switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform generating means |
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| CN107741555A true CN107741555A (en) | 2018-02-27 |
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|---|---|---|---|
| CN201710953183.2A Pending CN107741555A (en) | 2017-10-13 | 2017-10-13 | Switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform generating means |
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| CN102427345A (en) * | 2011-10-13 | 2012-04-25 | 吉林大学 | Accelerating device of rising edge and falling edge of current pulse and accelerating method thereof |
| CN105486973A (en) * | 2015-12-02 | 2016-04-13 | 河北省电力建设调整试验所 | Nanosecond steep leading edge index repetition pulse generator |
| CN205643427U (en) * | 2016-04-29 | 2016-10-12 | 西安浩能电气科技有限公司 | Generator rotor is index repetitive pulse generating device for turn -to -turn short circuit |
| CN106093686A (en) * | 2016-07-27 | 2016-11-09 | 国网河北省电力公司电力科学研究院 | A kind of method of circuit-breaker switching on-off coil turn-to-turn short circuit fault detect |
| CN106788264A (en) * | 2015-11-19 | 2017-05-31 | 中国科学院合肥物质科学研究院 | bipolar pulse generator |
| CN107040245A (en) * | 2017-05-03 | 2017-08-11 | 深圳市硕亚科技有限公司 | Kiloampere heavy current pulse signal generation device and DIDT test equipments |
-
2017
- 2017-10-13 CN CN201710953183.2A patent/CN107741555A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427345A (en) * | 2011-10-13 | 2012-04-25 | 吉林大学 | Accelerating device of rising edge and falling edge of current pulse and accelerating method thereof |
| CN106788264A (en) * | 2015-11-19 | 2017-05-31 | 中国科学院合肥物质科学研究院 | bipolar pulse generator |
| CN105486973A (en) * | 2015-12-02 | 2016-04-13 | 河北省电力建设调整试验所 | Nanosecond steep leading edge index repetition pulse generator |
| CN205643427U (en) * | 2016-04-29 | 2016-10-12 | 西安浩能电气科技有限公司 | Generator rotor is index repetitive pulse generating device for turn -to -turn short circuit |
| CN106093686A (en) * | 2016-07-27 | 2016-11-09 | 国网河北省电力公司电力科学研究院 | A kind of method of circuit-breaker switching on-off coil turn-to-turn short circuit fault detect |
| CN107040245A (en) * | 2017-05-03 | 2017-08-11 | 深圳市硕亚科技有限公司 | Kiloampere heavy current pulse signal generation device and DIDT test equipments |
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Application publication date: 20180227 |