CN206235707U - A kind of connection circuit of double-fracture breaker DC Steady voltage's distribiuting - Google Patents
A kind of connection circuit of double-fracture breaker DC Steady voltage's distribiuting Download PDFInfo
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- CN206235707U CN206235707U CN201621104609.4U CN201621104609U CN206235707U CN 206235707 U CN206235707 U CN 206235707U CN 201621104609 U CN201621104609 U CN 201621104609U CN 206235707 U CN206235707 U CN 206235707U
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Abstract
The utility model discloses the connection circuit and test method of a kind of double-fracture breaker DC Steady voltage's distribiuting, including breaker, it has earth terminal fracture K1 and high-pressure side fracture K2, the high-pressure side fracture K2 is connected with DC break down voltage complexes and voltmeter U, affiliated earth terminal fracture K1 is grounded at one end, and its two ends is parallel with ball discharge gap；The DC break down voltage complexes include booster power cabinet DCVMS, DC generator times pressure cylinder, measurement impedance and protective resistance Rp.The invention also discloses a kind of test method of double-fracture breaker DC Steady voltage's distribiuting, use ball stand-off distance that the distribution situation of steady state voltage accounting is asked for from the mode for applying DC voltage for variable., by the true operating condition of simulated field as far as possible, examination breaker is in DC Steady voltage distribution situation for the utility model.
Description
Technical field
The utility model is related to DC transmission system O＆M technical field, and in particular to a kind of double-fracture breaker direct current is steady
The connection circuit of two fracture DC voltages distribution under state voltage.
Background technology
Double-fracture breaker is widely used in power system, and wherein ac filter breaker is one of which, as
A kind of visual plant of current conversion station, can reduce the harmonic wave produced in alternating current-direct current conversion process, it is ensured that the quality of power supply is up to standard.And hand over
Stream filter and breaker (hereinafter referred to as ACF breakers) need to cut off capacitive load due to its special application scenario, and switching is frequently
It is numerous, wherein the distribution of two fracture DC voltages can influence breaker to cut-off success rate, should be to its two fracture compared to normal circuit breaker
DC voltage distribution is measured.
When breaker cuts alternating current filter capacitive load, the change procedure of fracture both end voltage.Due to breaker and capacitive
Capacitive load voltage will not occur temporarily change in theory after load, simultaneously because filter capacitor capacitance is larger, voltage declines more
Slowly, therefore equivalent in breaker side a DC voltage is applied.
At present, the voltage's distribiuting of international standard, domestic standard and professional standard not to double-fracture breaker enters professional etiquette
It is fixed, also without corresponding test method and test connection loop.But because double-fracture breaker is predominantly located in open air, due to
Filthy presence, breaker sheet resistance can change, simultaneously because DC voltage is distributed according to sheet resistance, therefore research
DC voltage distribution is significant.But because divider impedance is smaller, its impedance can be changed after being directly incorporated into fracture,
Cause voltage measurement distortion.
Utility model content
For correct measurement DC voltage, one of distribution situation, the purpose of this utility model are base between breaker fracture
The need for double-fracture breaker DC Steady voltage's distribiuting is measured, there is provided a kind of double-fracture breaker DC Steady voltage's distribiuting
The true operating condition in test connection loop, as far as possible simulated field, voltage's distribiuting feelings of the examination breaker in DC Steady voltage
Condition.
To achieve the above object, the utility model is adopted the technical scheme that：
A kind of connection circuit of double-fracture breaker DC Steady voltage's distribiuting, including breaker, there is earth terminal to break for it
Mouth K1 and high-pressure side fracture K2；The high-pressure side fracture K2 is connected with DC break down voltage complexes and voltmeter U, affiliated earth terminal
Fracture K1 is grounded at one end, and its two ends is parallel with ball discharge gap；The DC break down voltage complexes include booster power
Cabinet DCVMS, DC generator times pressure cylinder, measurement impedance and protective resistance Rp；The booster power cabinet DCVMS receives control command
Square wave power is exported afterwards gives DC generator times pressure cylinder；The DC generator times pressure cylinder includes intermediate-frequency transformer TT, rectification two
Pole pipe D1, commutation diode D2, isolation resistance Re, times voltage capacitance CS1 and times voltage capacitance CS2, the intermediate-frequency transformer TT is in primary
The square wave current of booster power cabinet DCVMS, primary side concatenation isolation resistance are accessed after an ammeter and times voltage capacitance Cs1 in side
Re, the isolation resistance ReThe positive connection commutation diode D1 and times voltage capacitance C of the other endS2, times voltage capacitance CS2 other ends are connected
Negative sense connects commutation diode D2, and the end is also associated with the high-voltage output end of DC generator times pressure cylinder, the commutation diode
The positive port of D2 meets a times voltage capacitance C altogether with commutation diode D1 negative senses portS1 one end, the end is connected with DC generator times
The low-voltage output of pressure cylinder, times voltage capacitance CS1 other end is by taking back intermediate-frequency transformer TT, DC generator after an ammeter
The low-voltage output ground connection of times pressure cylinder；The low-voltage output of measurement impedance one end connection DC generator times pressure cylinder 22, separately
One end connects the high-pressure side fracture K2 of breaker；Protective resistance RpTwo ends respectively with high-pressure side fracture K2 and DC generator times
The low-voltage output connection of pressure cylinder.
Compared with prior art, its advantage is the utility model：Using DC voltage generator experimental rig with
And measurement ball gap, apply high direct voltage in the fracture of breaker one, while another fracture is grounded, wherein ground connection fracture both sides parallel connection one
Measurement ball gap, applies voltages to ball gap and punctures, then can calculate the distribution of two fractures and bear magnitude of voltage, reaches measurement double-fracture breaker
The purpose of voltage's distribiuting under steady-state DC voltage operating mode.
Brief description of the drawings
Fig. 1 is the connection circuit schematic diagram of the utility model double-fracture breaker DC Steady voltage's distribiuting；
Fig. 2 is the structural representation of double-fracture breaker；
Fig. 3 illustrates for the use flow of the connection circuit of the utility model double-fracture breaker DC Steady voltage's distribiuting
Figure；
Specific embodiment
Content of the present utility model is described in further details with reference to the accompanying drawings and detailed description.
Refer to shown in Fig. 1 and Fig. 2, a kind of connection circuit of double-fracture breaker DC Steady voltage's distribiuting, the loop
For testing double-fracture breaker this test item, the breaker that the double-fracture breaker is generally used for alternating current filter is
The breaker of 220kV and ratings above；The connection circuit includes breaker 1, and it has earth terminal fracture K1 and high-pressure side disconnected
Mouth K2, the high-pressure side fracture K2 are connected with DC break down voltage complexes 2 and voltmeter U, and affiliated earth terminal fracture K1 is at one end
Ground connection, and its two ends is parallel with ball discharge gap 3；The DC break down voltage complexes 2 include booster power cabinet DCVMS, straight
Flow-generator times pressure cylinder 22, measurement impedance 23 and protective resistance Rp；The booster power cabinet DCVMS is exported after receiving control command
Square wave power is to DC generator times pressure cylinder 22；The DC generator times pressure cylinder 22 includes intermediate-frequency transformer TT, the pole of rectification two
Pipe D1, commutation diode D2, isolation resistance Re, times voltage capacitance CS1 and times voltage capacitance CS2, the intermediate-frequency transformer TT is in primary side
The square wave current of booster power cabinet DCVMS, primary side concatenation isolation resistance are accessed after an ammeter 21 and times voltage capacitance Cs1
Re, the isolation resistance ReThe positive connection commutation diode D1 and times voltage capacitance C of the other endS2, times voltage capacitance CS2 other ends are connected
Negative sense connects commutation diode D2, and the end is also associated with the high-voltage output end of DC generator times pressure cylinder 22, the pole of the rectification two
The positive port of pipe D2 meets a times voltage capacitance C altogether with commutation diode D1 negative senses portS1 one end, the end is connected with DC generator
The low-voltage output of times pressure cylinder 22, times voltage capacitance CS1 other end is by taking back intermediate-frequency transformer TT, direct current after an ammeter 21
The low-voltage output ground connection of generator voltage doubling cylinder 22；The low pressure of measurement impedance 23 one end connection DC generator times pressure cylinder 22
Output end, the other end connects the high-pressure side fracture K2 of breaker 1；Protective resistance RpTwo ends respectively with high-pressure side fracture K2 and straight
The low-voltage output connection of flow-generator times pressure cylinder 22.
Used as another embodiment, the connection circuit also includes earth-return circuit 24, and it includes the ground connection electricity being in series
Resistance ReWith switch K, switch K other end ground connection, earth resistance ReOther end connection high-pressure side fracture K2.
The booster power cabinet DCVMS：High voltage output scope selects different gears according to actual needs, is connected to boosting and refers to
After order, the variable square wave power of output amplitude is to DC generator times pressure cylinder 22.
The DC generator times pressure cylinder 22, for square wave power to be boosted by its built-in intermediate-frequency transformer TT, then
High pressure is exported by commutation diode D1, the D2 in it.
It is described
Its operation principle and the course of work are as follows：
1. input power is pre- steady：Because line voltage has fluctuation, so supply voltage is stablized output in advance first needing
The DC low voltage power supply wanted, due to needing to meet the output area of ultra-wide, it is therefore an objective to reduce power network fluctuation amplitude defeated to major loop
Go out direct current influence；
2. copped wave boosting (low pressure feedback)：Pre- steady low-voltage dc power supply is exported by the mode that copped wave is boosted can
With the out-put supply of zero, to export low pressure as feedback signal, it is therefore an objective to the high stable DC low voltage power supply that output can be adjusted；
3. copped wave boosting (high-voltage feedback)：High stable DC low voltage power supply is exported into low tension by the mode that copped wave is boosted
Source, with high tension voltage as feedback signal, it is therefore an objective to which the fluctuation of high tension voltage can be automatically adjusted into output high stable DC low-voltage electricity
Source；
4. bridge type inverse：High stable DC low voltage power supply is reverse into the adjustable square wave power of amplitude；
5. intermediate-frequency transformer TT, DC generator times pressure cylinder 22, measuring cylinder (not shown)：Square wave power is become by intermediate frequency
Depressor TT is boosted, then exports high pressure by commutation diode D1, D2 rectification, and multiplication of voltage is exported using doube bridge arm, it is possible to decrease ripple system
Number；High-tension measurement and high-pressure sampling signal use the high-tension resistive of high precision high stability degree Low Drift Temperature.
The use flow of the connection circuit in above-mentioned double-fracture breaker DC Steady voltage's distribiuting of the present utility model, ginseng
See shown in Fig. 3, DC voltage is applied as variable from actual measurement breaker using ball discharge stand-off distance, realize that breaker fracture direct current is steady
The measurement of state voltage's distribiuting situation, comprises the following steps：
Step 1, individually the ball discharge gap 3 of fixed interval (FI) distance is carried out puncturing examination using DC generator times pressure cylinder 22
Test, obtain the ball gap dc breakdown magnitude of voltage under the gap, and be designated as U1；In the present embodiment, selection clearance distance be 6mm,
12mm, 19mm and 30mm are illustrated.
The measuring voltage distribution of table 1 is grouped
| Sphere gap length (mm) | Ball gap breakdown voltage U1 (kV) | DC side test voltage U (kV) | Ground connection fracture DC Steady voltage accounting (%) |
| 6 | / | / | / |
| 12 | / | / | / |
| 19 | / | / | / |
| 30 | / | / | / |
Step 2, the high-pressure side fracture K2 to breaker 1 apply high direct voltage, while the two ends of earth terminal fracture K1 ground connection
The ball discharge gap 3 of step 1 fixed interval (FI) distance in parallel connection；
Step 3, by DC break down voltage experimental rig test voltage at the uniform velocity raise until ball gap puncture, record DC generator it is defeated
Go out voltage for U, i.e., perform the detection that U is pressed in DC test electrical verification for table 1；
Step 4, the clearance distance for increasing ball discharge gap 3, into step 1 circulate operation, until clearance distance exceedes threshold value
Stop circulation after distance, and record U1, the U of different gap under；
Step 5, different gap is calculated apart from earth terminal fracture DC Steady voltage accounting:U1/U.
As another embodiment, during experiment is pressure-resistant, because ball-gap discharge has certain dispersiveness, therefore to each
Ball gap under clearance distance carries out three breakdown tests.Double-fracture breaker carries out test voltage according to packet in table 1, to obtaining
Ball gap dc breakdown magnitude of voltage U1 and DC generator output voltage U do average treatment, then measurable double-fracture breaker break
Mouth DC Steady voltage's distribiuting situation.
Illustrated with certain DC converter station 500kV double-fracture breaker DC Steady voltage's distribiuting test examples.Double break
Mouthful breaker carries out Potential distribution measurement result using ball gap, as shown in table 2 below, can measure different sphere gaps under
Fracture Potential distribution situation：
The different gap of table 2 is apart from lower fracture Potential distribution situation
It is of substantially equal under fracture DC Steady voltage's distribiuting positive-negative polarity according to test data analyzer, with ball stand-off distance from
Increase, ground connection fracture DC Steady voltage accounting increase is 44% to the maximum, can accurately measure double-fracture DC Steady voltage
Distribution.
Above-described embodiment simply to illustrate that technology design of the present utility model and feature, the purpose is to be to allow this area
Interior those of ordinary skill will appreciate that content of the present utility model and implements according to this, can not limit of the present utility model with this
Protection domain.The equivalent change or modification that every essence according to the utility model content is made, should all cover in this reality
With in new protection domain.
Claims (2)
1. a kind of connection circuit of double-fracture breaker DC Steady voltage's distribiuting, including breaker (1), there is earth terminal to break for it
Mouth K1 and high-pressure side fracture K2, it is characterised in that：The high-pressure side fracture K2 is connected with DC break down voltage complexes (2) and voltage
Table U, affiliated earth terminal fracture K1 is grounded at one end, and its two ends is parallel with ball discharge gap (3)；The DC break down voltage is into suit
Put (2) and include booster power cabinet DCVMS, DC generator times pressure cylinder (22), measurement impedance (23) and protective resistance Rp；It is described
Square wave power is exported after booster power cabinet DCVMS reception control commands give DC generator times pressure cylinder (22)；The direct current occurs
Device times pressure cylinder (22) includes intermediate-frequency transformer TT, commutation diode D1, commutation diode D2, isolation resistance Re, times voltage capacitance CS1
Voltage capacitance C againS2, the intermediate-frequency transformer TT access boosting electricity in primary side after an ammeter (21) and times voltage capacitance Cs1
The square wave current of source cabinet DCVMS, primary side concatenation isolation resistance Re, the isolation resistance RePositive connection rectification two pole of the other end
Pipe D1 and times voltage capacitance CS2, times voltage capacitance CS2 other ends connection negative sense connection commutation diode D2, the end is also associated with direct current hair
The high-voltage output end of raw device times pressure cylinder (22), positive port and the commutation diode D1 negative senses port of the commutation diode D2 are total to
Meet a times voltage capacitance CS1 one end, the end is connected with the low-voltage output of DC generator times pressure cylinder (22), times voltage capacitance CS1 other end
By taking back intermediate-frequency transformer TT, the low-voltage output ground connection of DC generator times pressure cylinder (22) after an ammeter (21)；Institute
The low-voltage output of measurement impedance (23) one end connection DC generator times pressure cylinder (22) is stated, other end connection breaker (1)
High-pressure side fracture K2；Protective resistance RpLow pressure of the two ends respectively with high-pressure side fracture K2 and DC generator times pressure cylinder (22) it is defeated
Go out end connection.
2. the connection circuit of double-fracture breaker DC Steady voltage's distribiuting according to claim 1, it is characterised in that also
Earth-return circuit (24) is included, it includes the earth resistance R being in serieseWith switch K, switch K other end ground connection, earth resistance Re
Other end connection high-pressure side fracture K2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621104609.4U CN206235707U (en) | 2016-09-30 | 2016-09-30 | A kind of connection circuit of double-fracture breaker DC Steady voltage's distribiuting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621104609.4U CN206235707U (en) | 2016-09-30 | 2016-09-30 | A kind of connection circuit of double-fracture breaker DC Steady voltage's distribiuting |
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| CN206235707U true CN206235707U (en) | 2017-06-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110428999A (en) * | 2019-07-26 | 2019-11-08 | 大连理工大学 | A kind of externally-applied magnetic field control system of vacuum circuit breaker with multi breaks voltage's distribiuting |
-
2016
- 2016-09-30 CN CN201621104609.4U patent/CN206235707U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110428999A (en) * | 2019-07-26 | 2019-11-08 | 大连理工大学 | A kind of externally-applied magnetic field control system of vacuum circuit breaker with multi breaks voltage's distribiuting |
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