CN205506980U - Discharge coil excitation characteristic test loop - Google Patents
Discharge coil excitation characteristic test loop Download PDFInfo
- Publication number
- CN205506980U CN205506980U CN201620360625.3U CN201620360625U CN205506980U CN 205506980 U CN205506980 U CN 205506980U CN 201620360625 U CN201620360625 U CN 201620360625U CN 205506980 U CN205506980 U CN 205506980U
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- Prior art keywords
- discharge coil
- switch
- characteristic test
- excitation characteristic
- potentiometer
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- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 230000005284 excitation Effects 0.000 title claims abstract description 32
- 238000004804 winding Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000010998 test method Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 13
- 239000003990 capacitor Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Abstract
The utility model discloses a discharge coil excitation characteristic test loop, include: voltage regulator, switch, voltmeter, step up transformer, ampere meter, divider, current sensor, signal pickup assembly. Because the switch has been added to the output at the voltage regulator for when test cycle finishes, through the pressure regulating end of disconnection switch recaccommodation voltage regulator, avoided this section period in discharge coil bear high voltage, heavy current in succession in whole test procedure, weakened discharge coil's adverse effect such as heat, vibration, enlarged excitation characteristic test scope.
Description
Technical field
This utility model relates to technical field of electricity, particularly relates to a kind of discharge coil excitation special
Property test loop.
Background technology
High-voltage parallel capacitor device is reactive-load compensation equipment important in electrical network, isolated neutral system
Shnt capacitor two ends also connect discharge coil, need to rely on discharge coil to release after capacitor separating brake
Its two ends residual charge.Discharge coil release condenser charge process and shnt capacitor point
Lock overvoltage is closely related.After capacitor switch cut-offs, the polarity of voltage on capacitor easily occurs
With system voltage opposite polarity, switch is made to produce higher restoring over-voltage, the numerical value of overvoltage
With discharge coil release electric charge process i.e. discharge speed, release in or without produce concussion relevant,
Can by discharge coil release condenser charge process calculate switch bear overvoltage, calculate
During, the excitation property of discharge coil is key parameter.
The current range of discharge coil excitation property is very big on the impact of above-mentioned result of calculation, if electric
Stream scope is too small, and exciting characteristic curve is sufficiently complete, and calculating deviation can be caused excessive.In parallel connection
Before capacitor separating brake, discharge coil bears system power frequency operation voltage together with shnt capacitor,
Now discharge coil presents high impedance, flows through electric current minimum.After shnt capacitor separating brake, electric discharge
Coil constitutes discharge loop together with shnt capacitor, and now it bears the direct current of shnt capacitor
Residual voltage, discharge coil quickly enters degree of depth saturation, and the current value passed through is up to tens of
Pacify peaces the most up to a hundred, for ensureing switch overvoltage computational accuracy, the excitation property electricity of discharge coil
Stream scope needs the biggest.
Fig. 1 is the circuit diagram in the discharge coil excitation characteristic test loop that prior art uses.As
Shown in Fig. 1, pressure regulator TV input is connected with power supply, exports and puts through ammeter A input
The Secondary Winding of electric coil T, mean voltage Table V is connected in discharge coil T two ends, with
Time by potentiometer Ku, current sensor Ki obtain test loop voltage, current waveform.Root
According to being actually needed, after setting a series of test voltages, by regulation pressure regulator TV, surveying
The parameters such as the voltage of discharge coil T, current waveform are recorded under examination voltage.Signals collecting is utilized to fill
Put the signal that S record potentiometer Ku, current sensor Ki collect.
Continuously adjust characteristic due to pressure regulator TV, set higher test voltage Uh
Time, need from low voltage, pressure regulator TV is adjusted to Uh, then carry out data record, then
Being backed off by voltage, therefore to bear high voltage, big current time longer for discharge coil, works as Uh again
Time too high, discharge coil enters saturation, and electric current is relatively big, unshakable in one's determination to be vibrated, for a long time
Maintain saturation that its winding may be caused to damage because of heat, vibrations.Therefore, side described in Fig. 1
Method test scope has bigger restriction.It addition, the discharge coil excitation property electricity that current producer provides
Pressure scope is typically to 1.5 times of rated voltages, and the electric current that this voltage correspondence discharge coil passes through is about
Tens milliamperes to 100 milliamperes, had big difference by the electric current of discharge coil during with electric discharge, cause
Test scope is less.
From the foregoing, it will be observed that how to reduce discharge coil bear high voltage, the time of big electric current, and then
The excitation characteristic test scope expanding discharge coil is urgently to be resolved hurrily the asking of those skilled in the art
Topic.
Utility model content
The purpose of this utility model is to provide a kind of discharge coil excitation characteristic test loop, is used for
Reduce discharge coil to bear high voltage, the time of big electric current, and then expand the excitation of discharge coil
Characteristic test scope.
For solving above-mentioned technical problem, this utility model provides a kind of discharge coil excitation property to survey
Examination loop, including: pressure regulator, switch, voltmeter, booster transformer, ammeter, dividing potential drop
Device, current sensor, signal pickup assembly；
The positive power source terminal of described pressure regulator is connected with positive source, the negative power end of described pressure regulator
Being connected with power cathode, the voltage adjusting end of described pressure regulator is connected with the first end of described switch, institute
The low-pressure side positive pole of the second end and described booster transformer of stating switch is connected, described voltmeter
First end is connected with the voltage adjusting end of described pressure regulator, the second end of described voltmeter and described pressure regulation
The negative power end of device connects, the two ends, high-pressure side of described booster transformer and the two of described potentiometer
End parallel connection, the two ends of described potentiometer are in parallel with the high pressure winding two ends of described discharge coil, institute
State ammeter and described current sensor is series at the high-pressure side earth terminal of described booster transformer and returns
Lu Shang, described signal pickup assembly is connected with described potentiometer and described current sensor.
Preferably, described switch is time switch.
Preferably, described time switch automatically shuts down after switch connection 0.4S.
Preferably, described potentiometer is resitstance voltage divider, and its intrinsic standoff ratio is 1000:1.
Preferably, described signal pickup assembly is DL750 electrographic recording instrument.
Discharge coil excitation characteristic test loop provided by the utility model, due at pressure regulator
Outfan add switch so that at the end of a test period, switched again by disconnection
The voltage adjusting end of regulation pressure regulator, it is to avoid in during this period of time, discharge coil is in the whole test process
Bear high voltage, big electric current continuously, reduce the ill effects such as the heat of discharge coil, vibration,
Expand excitation characteristic test scope.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment, below will be to required in embodiment
The accompanying drawing used does simple introduction, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of utility model, for those of ordinary skill in the art, are not paying wound
On the premise of the property made work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the circuit diagram in the discharge coil excitation characteristic test loop that prior art uses；
Fig. 2 returns for the discharge coil excitation characteristic test of a kind of embodiment that this utility model provides
The circuit diagram on road.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, in this utility model embodiment
Technical scheme be clearly and completely described, it is clear that described embodiment be only this
The a part of embodiment of utility model rather than all embodiment.Based on the reality in this utility model
Executing example, those of ordinary skill in the art, under not making creative work premise, are obtained
Every other embodiment, broadly falls into this utility model protection domain.
Core of the present utility model is to provide a kind of discharge coil excitation characteristic test loop.
In order to make those skilled in the art be more fully understood that this utility model scheme, below in conjunction with
The utility model is described in further detail for the drawings and specific embodiments.
Fig. 2 returns for the discharge coil excitation characteristic test of a kind of embodiment that this utility model provides
The circuit diagram on road.As in figure 2 it is shown, discharge coil excitation characteristic test loop includes: pressure regulator
TV, switch DK, voltmeter V, booster transformer TS, ammeter A, potentiometer Ku,
Current sensor Ki, signal pickup assembly S.
The positive power source terminal of pressure regulator TV is connected with power supply Us positive pole, the negative supply of pressure regulator TV
End is connected with power supply Us negative pole, and the voltage adjusting end of pressure regulator TV is connected with first end of switch DK,
Second end of switch DK is connected with the low-pressure side positive pole of booster transformer TS, voltmeter V's
First end is connected with the voltage adjusting end of pressure regulator TV, second end of voltmeter V and pressure regulator TV
Negative power end connect, the two ends, high-pressure side of booster transformer TS and the two ends of potentiometer Ku are also
Connection, the two ends of potentiometer Ku are in parallel with the high pressure winding two ends of discharge coil T, ammeter A
It is series on the earth terminal loop, high-pressure side of booster transformer TS with current sensor Ki, signal
Harvester S is connected with potentiometer Ku and current sensor Ki.
In being embodied as, it is first determined each electricity required for discharge coil excitation characteristic test
Pressure value, selects a magnitude of voltage to start test in the magnitude of voltage determined, it is generally the case that
Can be according to the size of magnitude of voltage, descending test, or ascending test.Utilize and adjust
The voltage-regulation of power supply to required voltage, specifically can be determined by depressor by voltmeter
Whether regulate to desired value.After pressure regulation completes, by switch open, now, adopted by signal
Acquisition means gathers the output signal of potentiometer and current sensor using as follow-up use.Work as collection
After completing, will switch off, by the magnitude of voltage needed for pressure regulator pressure regulation to the next one, repeat
Said process, until completing all of required magnitude of voltage.As can be seen here, at upper one
When magnitude of voltage is to next magnitude of voltage, owing to switch will disconnect after collection completes, it is to avoid put
Electric coil bears high voltage, big electric current in whole test process continuously, then discharge coil
The ill effects such as heat, vibration will weaken, enabling completes the test under bigger electric current, expands
Big excitation characteristic test scope.
It should be noted that the booster transformer in the present embodiment is the voltage exported by pressure regulator
Boost, be directly output to the high-pressure side winding of discharge coil, existing skill can be prevented effectively from
In art, carry out testing excitation property in Secondary Winding, need to be scaled to a winding, increase work
Measure, simultaneously because once, Secondary Winding leakage reactance different, when exciting current is bigger, conversion
The problem that process can produce bigger error.During by pressure regulator pressure regulation, utilize transformer voltage ratio meter
Calculate the output needed for pressure regulator.It addition, the Guan Bi of switch can be by automatically controlling and can also lead to
Crossing manual control realization, the present embodiment does not limits.
The discharge coil excitation characteristic test loop that the present embodiment provides, defeated due at pressure regulator
Go out end and add switch so that at the end of a test period, switched by disconnection and regulate again
The voltage adjusting end of pressure regulator, it is to avoid in during this period of time discharge coil in the whole test process continuously
Bear high voltage, big electric current, reduce the ill effects such as the heat of discharge coil, vibration, expand
Excitation characteristic test scope.
It is preferably carried out mode as one, switchs as time switch.
On the basis of a upper embodiment, switch needs staff to open according to practical situation,
Automatically disconnect after the setting time.By the description of above-described embodiment, survey can be completed
On the basis of examination, the time of switch open and disconnection should shorten as far as possible.If simply by work
If making personnel's timing, one is inefficient, and two is ageing poor.Therefore, the present embodiment
Select time switch.It should be noted that, the timing time of time switch can be according to actual feelings
Condition sets, and timing time described in the utility model is to switch from start-up time to when switching off
Carve the time experienced.Being preferably carried out mode as one, time switch is at switch connection 0.4S
After automatically shut down.
Being preferably carried out mode as one, potentiometer is resitstance voltage divider.
In being embodied as, potentiometer selects the potentiometer being made up of resistance, closes wink at switch
Between, there is transient process in circuit, voltage exists the DC component of AC compounent and decay simultaneously,
Resitstance voltage divider is simultaneously suitable for alternating current and direct current and measures examination, it is ensured that measure the voltage obtained
Signal is undistorted.If using capacitor type potentiometer, owing to capacitive divider is inapplicable and direct current
Measure examination, bigger measurement error can be caused.
When potentiometer is resitstance voltage divider, potentiometer no-load voltage ratio can be 1000:1, can facilitate
Calculate.It is to be understood that a kind of specific embodiment of the present embodiment, intrinsic standoff ratio can
Think arbitrary value.
Being preferably carried out mode as one, signal pickup assembly is DL750 electrographic recording instrument.
In being embodied as, signal pickup assembly is used for recording potentiometer and current sensor collection
The signal arrived, in the present embodiment, DL750 electrographic recording instrument selected by signal pickup assembly.
Above discharge coil excitation characteristic test loop provided by the utility model is carried out
It is discussed in detail.In description, each embodiment uses the mode gone forward one by one to describe, each embodiment weight
Point explanation is all the difference with other embodiments, identical similar portion between each embodiment
Divide and see mutually.For device disclosed in embodiment, owing to it is open with embodiment
Method corresponding, so describe is fairly simple, relevant part sees the explanation of method part i.e.
Can.It should be pointed out that, for those skilled in the art, without departing from this reality
On the premise of new principle, it is also possible to this utility model is carried out some improvement and modification, this
A little improvement and modification also fall in this utility model scope of the claims.
Professional further appreciates that, describes in conjunction with the embodiments described herein
The unit of each example and algorithm steps, it is possible to electronic hardware, computer software or the two
Be implemented in combination in, in order to clearly demonstrate the interchangeability of hardware and software, in described above
In generally described composition and the step of each example according to function.These functions are actually
Perform with hardware or software mode, depend on application-specific and the design constraint of technical scheme
Condition.Each specifically should being used for can be used different methods to realize institute by professional and technical personnel
The function described, but this realization is it is not considered that exceed scope of the present utility model.
Claims (5)
1. a discharge coil excitation characteristic test loop, it is characterised in that including: pressure regulation
Device, switch, voltmeter, booster transformer, ammeter, potentiometer, current sensor, letter
Number harvester；
The positive power source terminal of described pressure regulator is connected with positive source, the negative power end of described pressure regulator
Being connected with power cathode, the voltage adjusting end of described pressure regulator is connected with the first end of described switch, institute
The low-pressure side positive pole of the second end and described booster transformer of stating switch is connected, described voltmeter
First end is connected with the voltage adjusting end of described pressure regulator, the second end of described voltmeter and described pressure regulation
The negative power end of device connects, the two ends, high-pressure side of described booster transformer and the two of described potentiometer
End parallel connection, the two ends of described potentiometer are in parallel with the high pressure winding two ends of described discharge coil, institute
State ammeter and described current sensor is series at the high-pressure side earth terminal of described booster transformer and returns
Lu Shang, described signal pickup assembly is connected with described potentiometer and described current sensor.
Discharge coil excitation characteristic test loop the most according to claim 1, its feature
Being, described switch is time switch.
Discharge coil excitation characteristic test loop the most according to claim 2, its feature
Being, described time switch automatically shuts down after switch connection 0.4S.
4. return according to the discharge coil excitation characteristic test described in claim 1-3 any one
Road, it is characterised in that described potentiometer is resitstance voltage divider, its intrinsic standoff ratio is 1000:1.
Discharge coil excitation characteristic test loop the most according to claim 1, its feature
Being, described signal pickup assembly is DL750 electrographic recording instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620360625.3U CN205506980U (en) | 2016-04-25 | 2016-04-25 | Discharge coil excitation characteristic test loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620360625.3U CN205506980U (en) | 2016-04-25 | 2016-04-25 | Discharge coil excitation characteristic test loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205506980U true CN205506980U (en) | 2016-08-24 |
Family
ID=56706462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620360625.3U Withdrawn - After Issue CN205506980U (en) | 2016-04-25 | 2016-04-25 | Discharge coil excitation characteristic test loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205506980U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699828A (en) * | 2016-04-25 | 2016-06-22 | 国网浙江省电力公司电力科学研究院 | Discharge coil excitation characteristic test loop |
| CN109683073A (en) * | 2019-02-21 | 2019-04-26 | 国网福建省电力有限公司 | A kind of method of high voltage direct current pressure test electric discharge |
-
2016
- 2016-04-25 CN CN201620360625.3U patent/CN205506980U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699828A (en) * | 2016-04-25 | 2016-06-22 | 国网浙江省电力公司电力科学研究院 | Discharge coil excitation characteristic test loop |
| CN105699828B (en) * | 2016-04-25 | 2019-02-15 | 国网浙江省电力有限公司电力科学研究院 | A kind of discharge coil excitation characteristic test circuit |
| CN109683073A (en) * | 2019-02-21 | 2019-04-26 | 国网福建省电力有限公司 | A kind of method of high voltage direct current pressure test electric discharge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 310014 District of Hangzhou City, Zhejiang Province, the eight district of Zhaohui Co-patentee after: State Grid Corporation of China Patentee after: Power Science Research Institute of Zhejiang Electric Power Co., Ltd. Address before: 310014 Huadian District, Hangzhou, Hangzhou, Zhejiang Province, No. 1 Co-patentee before: State Grid Corporation of China Patentee before: Electric Power Research Institute of State Grid Zhejiang Electric Power Company |
|
| CP03 | Change of name, title or address | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160824 Effective date of abandoning: 20190215 |
|
| AV01 | Patent right actively abandoned |