CN106817036A - A kind of insulator artificial pollution test high-voltage DC power supply - Google Patents
A kind of insulator artificial pollution test high-voltage DC power supply Download PDFInfo
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- CN106817036A CN106817036A CN201510850101.2A CN201510850101A CN106817036A CN 106817036 A CN106817036 A CN 106817036A CN 201510850101 A CN201510850101 A CN 201510850101A CN 106817036 A CN106817036 A CN 106817036A
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Abstract
The present invention provides a kind of insulator artificial pollution test high-voltage DC power supply, and the high-voltage DC power supply includes alternating-current voltage source, booster circuit, rectification circuit and filter circuit；The alternating-current voltage source output AC voltage；Exported after alternating voltage conversionization voltage class that the booster circuit exports alternating-current voltage source alternating voltage higher；The rectification circuit is exported after the alternating voltage that the booster circuit is exported is converted into DC voltage；The filter circuit is used to store charge capacity, and exports to insulator after the DC voltage that the rectification circuit is exported is filtered.The technical scheme that the present invention is provided is high to the utilization ratio of AC power, and electric loop is simple for structure, and Control System Design is simple, while artificial pollution test is met to high-voltage DC power supply requirement, greatly reduces equipment manufacturing cost.
Description
Technical field
The present invention relates to a kind of dc source, in particular to a kind of insulator artificial pollution test high-voltage DC power supply belongs to
High-voltage test techniques field.
Background technology
Artificial pollution test is used to carry out high-voltage testing room insulator direct current artificial pollution test with high-voltage dc power supply,
The insulator contamination characteristic of acquisition is configured for high-voltage testing room filth insulation, it is ensured that power system is in dirty moist ring
Safe operation under border.Insulator artificial pollution test dc source need to meet IEC61245 to the requirement about test loop, to master
The requirement of electric power loop is mainly the relative voltage drop occurred in resistance test and is not to be exceeded 10%, should not surpass with respect to voltage overshoot
10% is crossed, under output direct current 500mA, the resistive load electric current for continuing the 0.5s times, voltage drop should be less than 5% on test product,
Requirement of the voltage overshoot less than 8%.
Existing insulator artificial pollution test dc source electrical schematic diagram is as shown in figure 1, the exchange 10kV high voltage power supplies of input are led to
Cross pressure regulator Ty and be adjusted to required voltage, copped wave, copped wave are carried out to sinusoidal ac by controlling the pilot angle of controllable silicon SCR
Exchange afterwards will be handed over by the DC voltage circuit after transformer T through being made up of high voltage silicon rectifier stack D, times voltage capacitance C and filter capacitor C '
Stream electricity is converted into direct current.When carrying out pollution test insulator surface and discharging, filter capacitor C both end voltages decline, and pass through
The pilot angle of quick regulation controllable silicon SCR, quick voltage compensation is carried out to electric capacity C, keeps relative voltage drop to be not to be exceeded 10%.
Because alternating current has carried out copped wave and multiplication of voltage before direct current is converted into above technical scheme, the utilization ratio of AC power is low,
The pilot angle of rapid increase controllable silicon SCR is needed when insulator surface discharges, to increase the utilization ratio of alternating current, is kept
Relative voltage drop is not to be exceeded 10%.Electric loop structure and Control System Design are more complicated, dc source high cost.
The content of the invention
For, the electric loop knot low to the utilization rate of AC power that solve pollution test dc source in the presence of prior art
Structure and the complicated problem of Control System Design, the present invention provides a kind of structure and control is simple, and the lower insulator artificial of cost is dirty
Dirty experiment high-voltage DC power supply.
The present invention provide technical scheme be：A kind of insulator artificial pollution test high-voltage DC power supply, it is theed improvement is that：
The high-voltage DC power supply includes alternating-current voltage source, booster circuit, rectification circuit and filter circuit；The alternating-current voltage source output
Alternating voltage is to booster circuit；The alternating voltage conversion that the booster circuit exports the alternating-current voltage source turns to voltage class more
Exported after alternating voltage high to rectification circuit；The alternating voltage that the booster circuit is exported is converted to direct current by the rectification circuit
Exported after voltage to filter circuit；The filter circuit is used to store electric charge, and the direct current that the rectification circuit is exported is pressed into
Exported to insulator after row filtering.
Preferably, the alternating-current voltage source is connected by relay switch with the input of the booster circuit, for exporting
The alternating voltage of 0-7.1kV gives the booster circuit.
Further, the booster circuit includes transformer；The first winding two ends of the transformer by relay switch KM2 with
The output end of alternating-current voltage source is connected, and one end of its Secondary Winding is connected with filter circuit, the other end and tranformer protection resistance R1
One end be connected, the other end of the tranformer protection resistance R1 is connected with rectification circuit；The transformer is defeated by alternating-current voltage source
0~7.1kV the voltage conversions for going out be 0~141kV voltages after, exported to the rectification circuit by tranformer protection resistance R1.
Preferably, the rectification circuit is half-wave rectifying circuit, and the half-wave rectifying circuit is made up of high voltage silicon rectifier stack D；The height
The anode of pressure silicon stack D meets tranformer protection resistance R1, and its negative electrode is connected with filter circuit.
Preferably, the filter circuit is made up of filter capacitor C1, and the two ends of the filter capacitor C1 connect rectification circuit respectively
And booster circuit；The capacity of the filter capacitor C1 is more thanWherein R is the discharge resistance of filter capacitor C1.
Further, the transformer is also associated with direct current measuring devices with the connection end of the filter circuit, for measuring
State discharge current when filter circuit discharges.
Further, the direct current measuring devices include DC current measurement resistance and current sensing means；The DC current
The one end for measuring resistance is connected with filter capacitor C1, other end ground connection；The DC current measurement resistance two ends are parallel with direct current
Flow detection device, the voltage Ur at DC measurement resistance two ends described in the direct current detection measurement device, and according to the voltage
The resistance r1 of Ur and the DC current measurement resistance calculates the discharge current I when filter circuit discharges：
Further, the filter circuit is connected with the connection end of the half-wave rectifying circuit with one end of direct current protecting resistance R2,
The other end of the direct current protecting resistance R2 is connected with the high-pressure side of insulator, the low-pressure end ground connection of the insulator.
Further, it is parallel with bleeder circuit between the high-pressure side and low-pressure end of the insulator；The bleeder circuit includes high-voltage arm
Resistance R3 and low-voltage arm resistance r2；The high-voltage arm resistance R3 connected with the low-voltage arm resistance r2 after with the insulator simultaneously
Connection；The two ends of the low-voltage arm resistance r2 are parallel with voltage check device, the voltage for measuring the insulator two ends.
Further, the two ends of the insulator are also parallel with earthed switch K, after insulator artificial pollution test terminates, pass through
Block system relay switch KM2 disconnects AC power, by connecting the earthed switch K, makes the electric charge on filter capacitor C1 through straight
Stream protective resistance R2 introduces the earth.
Compared with immediate prior art, the present invention has following marked improvement：
The electric loop of the insulator artificial pollution test high-voltage DC power supply that the present invention is provided is simple for structure, Control System Design
Simply, the utilization ratio to AC power is high, while artificial pollution test is met to high-voltage DC power supply requirement, drops significantly
Low equipment manufacturing cost.
Brief description of the drawings
Fig. 1 is the electrical schematic diagram of insulator artificial pollution test high-voltage DC power supply in the prior art；
The electrical schematic diagram of the insulator artificial pollution test high-voltage DC power supply that Fig. 2 is provided for the present invention；
In Fig. 1：K1, K2：The forward and backward level high-tension switch cabinet of pressure regulator；Ty：Pressure regulator；QS1：Controllable silicon cabinet suits keeps apart
Close；SCR：Controllable silicon；T：Testing transformer；Rb1：AC protective resistance；C’：Voltage doubling capacitor；C：Filter capacitor
Device；D：High voltage silicon rectifier stack；Ka：Safety ground system；Rb2：DC side protective resistance；R1/R2：D.C. resistance divider；Rf：
Discharge resistance；Kd：High speed grounding switch；C1/C2：Coupled capacitor device；C3/C4：AC potentiometer；
In Fig. 2：T1：Transformer；R1：Tranformer protection resistance；D：High voltage silicon rectifier stack；C1：Filter capacitor；R2：Direct current is protected
Shield resistance；K：Earthed switch；R3：High-voltage arm resistance；r2：Low-voltage arm resistance；r1：DC current measurement resistance；R4：Quilt
Survey insulator.
Specific embodiment
Specific embodiment of the invention is described in further detail below in conjunction with the accompanying drawings.
In order to thoroughly understand the embodiment of the present invention, detailed structure will be proposed in following description.Obviously, the embodiment of the present invention
Execution be not limited to the specific details that those skilled in the art is familiar with.Presently preferred embodiments of the present invention is described in detail as follows,
But in addition to these detailed descriptions, the present invention can also have other embodiment.
The electrical schematic diagram of the insulator artificial pollution test high-voltage DC power supply that the present invention is provided is as shown in Figure 2.The high pressure
Dc source includes alternating-current voltage source, booster circuit, rectification circuit and filter circuit；The alternating-current voltage source output AC voltage
To booster circuit；The alternating voltage conversion that the booster circuit exports the alternating-current voltage source turns to voltage class exchange higher
Exported after voltage to rectification circuit；The rectification circuit is converted to the alternating voltage that the booster circuit is exported defeated after DC voltage
Go out to filter circuit；The filter circuit is used to store charge capacity, and the DC voltage that the rectification circuit is exported is filtered
Exported after ripple to insulator.
The alternating-current voltage source is connected by relay switch KM2 with the input of the booster circuit, for exporting 0-7.1kV
Alternating voltage give the booster circuit.
The booster circuit includes transformer；The first winding two ends of the transformer are by relay switch and alternating-current voltage source
Output end is connected, and one end of its Secondary Winding is connected with filter circuit, and the other end is connected with one end of tranformer protection resistance R1,
The other end of the tranformer protection resistance R1 is connected with rectification circuit；0~7.1kV that the transformer exports alternating-current voltage source
Voltage conversion be 0~141kV voltages after, exported to the rectification circuit by tranformer protection resistance R1；The tranformer protection
Resistance R1 is used for the high-pressure side when insulator surface is run through by electric arc prevents the electric current for flowing through transformer excessive under being in short-circuit condition,
Transformer is damaged, transformer is played a protective role.
The rectification circuit is half-wave rectifying circuit, and the half-wave rectifying circuit is made up of high voltage silicon rectifier stack D；The high voltage silicon rectifier stack D
Anode meet tranformer protection resistance R1, its negative electrode is connected with filter circuit.
The filter circuit is made up of filter capacitor C1, and the two ends of the filter capacitor C1 connect rectification circuit and rise piezoelectricity respectively
Road.When carrying out pollution test insulator surface and discharging, filter capacitor C1 both end voltages decline, the appearance of filter capacitor C1
It is sufficiently large that amount is reserved in design, and alternating current charges after high voltage silicon rectifier stack D rectifications to filter capacitor C1, thus can protect
The relative voltage drop held on insulator test product is less than 10%；To meet the requirement of test loop during IEC61245 is tested to artificial pollution.
Artificial pollution test is required dc source：Output direct current 500mA, continues under the resistive load electric current of 0.5ms times,
Voltage drop on insulator test product is less than 10%.Insulator test product both end voltage is substantially equal to the voltage of both ends of filter capacitor.Ignore
AC power is to the charging capacity of filter capacitor in 0.5 second, and filter capacitor discharge calculation formula is as follows：
Vt=V0*e-t/Rc1
In formula, VtFilter capacitor voltage at -0.5 second, unit V
V0- filter capacitor initial voltage, unit V
T-discharge time, unit s
R-filter capacitor discharge resistance, unit Ω
C1-filter capacitor capacity, unit F
Vt=0.9*V0, discharge time t=0.5s, filter capacitor discharge resistance R=R2, then 0.9*V0=V0*e-t/Rc1, according to
0.9*V0=V0*e-t/Rc1The capacity for calculating filter capacitor C1 isThe then voltage drop on insulator test product is less than 10%
In the case of, the capacity of filter capacitor C1 should be greater thanWherein R2 is the resistance of direct current protecting resistance, direct current protecting resistance
Resistance be the discharge resistance of filter capacitor.
The transformer is also associated with direct current measuring devices with the connection end of the filter circuit, for measuring the filtered electrical
Discharge current when road is discharged.
The direct current measuring devices include DC current measurement resistance r1 and current sensing means；The DC current measurement electricity
The one end for hindering r1 is connected with filter capacitor C1, other end ground connection；The current sensing means is connected in parallel on the DC current measurement
Resistance r1 two ends；When filter capacitor C1 occurs discharge and recharge, have electric current I and flow through resistance r1, occur voltage drop on r1
Ur.The voltage Ur at current sensing means monitoring DC current measurement resistance r1 two ends, electric current I is can be calculated through following formula：Additionally current sensing means can be replaced with Current Transformer, by the low-pressure end series current in filter capacitor C1
Transformer, can detect electric currents of the filter capacitor C1 in electric discharge.
The filter circuit is connected with the connection end of the half-wave rectifying circuit with one end of direct current protecting resistance R2, the direct current
The other end of protective resistance R2 is connected with the high-pressure side of insulator, the low-pressure end ground connection of the insulator；The direct current protecting resistance
When R2 causes to run through for insulator R4 generation arc discharges or earthed switch K is grounded, filter capacitor C1 is by direct current protecting electricity
Resistance R2 is discharged over the ground, and filter capacitor C1 is shielded.
Bleeder circuit is parallel between the high-pressure side and low-pressure end of the insulator；The bleeder circuit include high-voltage arm resistance R3 and
Low-voltage arm resistance r2；The high-voltage arm resistance R3 is in parallel with the insulator after being connected with the low-voltage arm resistance r2；It is described low
The two ends of pressure arm resistance r2 are parallel with voltage check device, the voltage for measuring the insulator two ends.
The two ends of the insulator are also parallel with earthed switch K, and after the completion of artificial pollution test tests, AC power KM2 breaks
Open, but electric capacity C1 still possesses electric charge, and filter capacitor C1 is introduced into ground connection through direct current protecting resistance R2 by closing ground connection K, makes
Electric charge on filter capacitor C1 is released, it is ensured that change personal safety during insulator test product.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention rather than its limitations, although reference
Above-described embodiment has been described in detail to the present invention, and those of ordinary skill in the art still can be to of the invention specific
Implementation method is modified or equivalent, these without departing from any modification of spirit and scope of the invention or equivalent,
Applying within pending claims.
Claims (10)
1. a kind of insulator artificial pollution test high-voltage DC power supply, it is characterised in that：The high-voltage DC power supply includes exchange
Voltage source, booster circuit, rectification circuit and filter circuit；The alternating-current voltage source output AC voltage is to booster circuit；It is described
The alternating voltage conversion that booster circuit exports the alternating-current voltage source is exported to rectification after turning to voltage class alternating voltage higher
Circuit；The rectification circuit is exported to filter circuit after the alternating voltage that the booster circuit is exported is converted into DC voltage；Institute
Filter circuit is stated for storing electric charge, and is exported to insulator after the DC voltage that the rectification circuit is exported is filtered.
2. high-voltage DC power supply according to claim 1, it is characterised in that：
The alternating-current voltage source is connected by relay switch with the input of the booster circuit, the friendship for exporting 0-7.1kV
Stream voltage gives the booster circuit.
3. high-voltage DC power supply according to claim 1 and 2, it is characterised in that：
The booster circuit includes transformer；The first winding two ends of the transformer pass through relay switch KM2 and alternating voltage
The output end in source is connected, and one end of its Secondary Winding is connected with filter circuit, one end phase of the other end and tranformer protection resistance R1
Even, the other end of the tranformer protection resistance R1 is connected with rectification circuit；The transformer exports alternating-current voltage source
0~7.1kV voltage conversions be 0~141kV voltages after, exported to the rectification circuit by tranformer protection resistance R1.
4. high-voltage DC power supply according to claim 1, it is characterised in that：
The rectification circuit is half-wave rectifying circuit, and the half-wave rectifying circuit is made up of high voltage silicon rectifier stack D；The high voltage silicon rectifier stack D
Anode meet tranformer protection resistance R1, its negative electrode is connected with filter circuit.
5. high-voltage DC power supply according to claim 1, it is characterised in that：
The filter circuit is made up of filter capacitor C1, and the two ends of the filter capacitor C1 connect rectification circuit and rise piezoelectricity respectively
Road；The capacity of the filter capacitor C1 is more thanWherein R is the discharge resistance of filter capacitor C1.
6. high-voltage DC power supply according to claim 3, it is characterised in that：
The transformer is also associated with direct current measuring devices with the connection end of the filter circuit, for measuring the filtered electrical
Discharge current when road is discharged.
7. high-voltage DC power supply according to claim 6, it is characterised in that：
The direct current measuring devices include DC current measurement resistance and current sensing means；The DC current measurement resistance
One end be connected with filter capacitor C1, the other end ground connection；The DC current measurement resistance two ends are parallel with direct current detection dress
Put, the voltage Ur at DC measurement resistance two ends described in the direct current detection measurement device, and according to the voltage Ur and institute
Discharge current I when the resistance r1 calculating filter circuits for stating DC current measurement resistance discharge：
8. high-voltage DC power supply according to claim 4, it is characterised in that：
The filter circuit is connected with the connection end of the half-wave rectifying circuit with one end of direct current protecting resistance R2, the direct current
The other end of protective resistance R2 is connected with the high-pressure side of insulator, the low-pressure end ground connection of the insulator.
9. high-voltage DC power supply according to claim 8, it is characterised in that：
Bleeder circuit is parallel between the high-pressure side and low-pressure end of the insulator；The bleeder circuit include high-voltage arm resistance R3 and
Low-voltage arm resistance r2；The high-voltage arm resistance R3 is in parallel with the insulator after being connected with the low-voltage arm resistance r2；It is described low
The two ends of pressure arm resistance r2 are parallel with voltage check device, the voltage for measuring the insulator two ends.
10. high-voltage DC power supply according to claim 8, it is characterised in that：
The two ends of the insulator are also parallel with earthed switch K, after insulator artificial pollution test terminates, by cutting off relay
Device switch KM2 disconnects AC power, by connecting the earthed switch K, makes the electric charge on filter capacitor C1 through direct current protecting electricity
Resistance R2 introduces the earth.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510850101.2A CN106817036A (en) | 2015-11-27 | 2015-11-27 | A kind of insulator artificial pollution test high-voltage DC power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510850101.2A CN106817036A (en) | 2015-11-27 | 2015-11-27 | A kind of insulator artificial pollution test high-voltage DC power supply |
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| CN106817036A true CN106817036A (en) | 2017-06-09 |
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| CN201510850101.2A Pending CN106817036A (en) | 2015-11-27 | 2015-11-27 | A kind of insulator artificial pollution test high-voltage DC power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114019246A (en) * | 2021-11-05 | 2022-02-08 | 广东电网有限责任公司 | Lightning arrester testing device |
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| CN204179648U (en) * | 2014-11-27 | 2015-02-25 | 哈尔滨理工大学 | A kind of earthed circuit suppressing sample breakdown temporary over-current phenomenon generation in high direct voltage breakdown test process |
| CN104502644A (en) * | 2014-12-12 | 2015-04-08 | 国家电网公司 | Ultrahigh-voltage direct-current voltage generator for pollution test |
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| CN101339221A (en) * | 2008-08-12 | 2009-01-07 | 中国西电电气股份有限公司 | Test device for reactor volt-second characteristic of high voltage direct current transmission valve |
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| CN104020380A (en) * | 2014-06-18 | 2014-09-03 | 重庆大学 | Experimental system and method for simulating charge accumulation on surface of gas solid in different kinds of gas at different temperatures |
| CN204179648U (en) * | 2014-11-27 | 2015-02-25 | 哈尔滨理工大学 | A kind of earthed circuit suppressing sample breakdown temporary over-current phenomenon generation in high direct voltage breakdown test process |
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| CN114019246A (en) * | 2021-11-05 | 2022-02-08 | 广东电网有限责任公司 | Lightning arrester testing device |
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