CN202275145U - Current breaking test apparatus for direct current breaker - Google Patents
Current breaking test apparatus for direct current breaker Download PDFInfo
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- CN202275145U CN202275145U CN2011203771811U CN201120377181U CN202275145U CN 202275145 U CN202275145 U CN 202275145U CN 2011203771811 U CN2011203771811 U CN 2011203771811U CN 201120377181 U CN201120377181 U CN 201120377181U CN 202275145 U CN202275145 U CN 202275145U
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- circuit breaker
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- 238000012360 testing method Methods 0.000 title claims abstract description 84
- 239000003990 capacitor Substances 0.000 claims abstract description 36
- 238000007600 charging Methods 0.000 claims abstract description 20
- 230000011218 segmentation Effects 0.000 claims description 14
- 239000004576 sand Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 8
- 230000010355 oscillation Effects 0.000 abstract description 8
- 238000011084 recovery Methods 0.000 abstract description 5
- 238000005070 sampling Methods 0.000 abstract 4
- 238000010277 constant-current charging Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229960001296 zinc oxide Drugs 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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Abstract
The utility model provides a current breaking test apparatus for a direct current breaker. The test apparatus comprises a constant current charging device, a charging switch, a capacitor set, an inductor L, a protection circuit and a sampling circuit. The protection circuits comprises a segment inductor L1, a protection circuit breaker BP and an energy discharge resistor R, wherein the segment inductor L1, the protection circuit breaker BP and the energy discharge resistor R are successively connected in a series manner. The sampling circuit comprises a sampling circuit breaker BT1, a sampling circuit breaker BT2, an inductor Ls, a capacitor Cs, and a lightning arrester MOV. Under any test condition during a current breaking test, a whole test loop can be protected by the protection circuit in a timely and effective manner. The adoption of the segment inductor in the test apparatus helps to simplify the design of the test loop and enables the design cost to be saved. The oscillation current during the whole test period is quite smooth and is similar to a direct current. The rise rate and the amplitude of a recovery voltage are basically equal to those of an actual operation condition, and the test equivalence is fine. The test apparatus is simple, reliable in design and economical in cost.
Description
Technical field
The utility model belongs to the direct current transportation field, specifically relates to a kind of dc circuit breaker electric current and divides breaking test device.
Background technology
Dc circuit breaker is a very important and imperative equipment in the dc fields equipment.China's dc circuit breaker, long-term dependence on import, external producer carries out blockade on new techniques to its gordian technique especially, has limited the development of China's dc circuit breaker research and development level.The test capability deficiency of domestic dc circuit breaker also becomes the key factor that influences its development.Because dc circuit breaker fails to domesticize, its high purchase cost has restricted the ability that China's dc fields system integration is domesticized.Based on above present situation, the independent research of dc circuit breaker has enormous function to the development of China's direct current transportation technology.
The construction of dc circuit breaker test capability has important directive significance to the independent research of dc circuit breaker, the actual motion condition that test capability should be able to equivalent the type dc circuit breaker, and can the snap-out release energy.Produce the direct current breaking current comprising the LC low-frequency vibration; Dc circuit breaker fracture branch is had no progeny, and the energy of storing in the inductance is given the charging of the capacitor in the dc circuit breaker, causes the voltage on the capacitor to rise rapidly, thereby produces the recovery superpotential at the fracture two ends; Behind the current segmenting, let out in the test loop and can protect branch road to pass through the LC dump energy in the quick consumption test loop of vibrating.Because in the whole test loop, need repeatedly use the inductance of Different L value, the segmentation inductance in the dc circuit breaker electric current disjunction experimental loop can influence the design in whole test loop, and the identical of trial value and actual value exerted an influence.Therefore, the inductance of reasonable Arrangement Different L value can reduce experimentation cost and improve test reliability.
The utility model content
The purpose of the utility model is to propose a kind of dc circuit breaker electric current and divides breaking test device; Test unit can equivalent preferably same type dc circuit breaker practical operation situation; And ability snap-out release energy, test unit can provide foundation for the development of dc circuit breaker.
For realizing the foregoing invention purpose, the technical scheme that the utility model is taked is:
A kind of dc circuit breaker electric current divides breaking test device, and its improvements are that said test unit comprises charging device, inductance L, holding circuit and test product circuit; Said inductance L comprises the segmentation inductance L
1With the segmentation inductance L
2, said holding circuit comprises the holding circuit isolating switch BP of series connection and lets out the ability resistance R that the test product circuit comprises test product circuit-breaker BT
1And BT
2, inductance L
s, capacitor C
sWith lightning arrester MOV.
Wherein: in the said test product circuit, test product circuit-breaker BT
1And BT
2Series arm, inductance L
sAnd capacitor C
sSeries arm and the parallel connection of lightning arrester MOV branch road.
Wherein: said charging device comprises rectifier, transformer, is connected in the charge switch of said rectifier DC output terminal, with charge switch series capacitors group, stake resistance and grounding switch, said stake resistance is afterwards parallelly connected with said capacitor group with the grounding switch series connection.
Wherein: said test product circuit and segmentation inductance L
2The series connection back is parallelly connected with said holding circuit, again with said segmentation inductance L
1Be composed in series the circuit-breaker testing loop.
The beneficial effect of the utility model is:
1, the design of test loop has promptly been simplified in the use of disjunction inductance in the test unit, has practiced thrift design cost again;
2, the oscillating current in the whole test cycle is all very mild, is similar to DC current, and the escalating rate of recovery voltage, amplitude are all basic identical with actual operating mode, and the test equivalence is good;
3, test unit is simple, reliable design, and holding circuit can be protected the test product circuit timely and effectively in the process of the test, prolongs test unit serviceable life, cost economy.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is the dc circuit breaker schematic diagram;
Fig. 2 is the dc circuit breaker test loop;
Fig. 3 is a dc circuit breaker charging device synoptic diagram;
Wherein: MOV is a Zinc-Oxide Arrester;
L is the subsidiary loop inductance;
C is a subsidiary loop electric capacity;
R is a line resistance;
B is the dc circuit breaker fracture;
L
1, L
2Be the segmentation inductance;
BP is a holding circuit isolating switch fracture;
BT1, BT2 are test product isolating switch fracture, and two fractures move simultaneously;
Ls is the test product loop inductance;
Cs is the test product tank capacitance.
Embodiment
The utility model discloses a kind of dc circuit breaker electric current and divide breaking test device, reasonable Arrangement charging device, segmentation inductance and holding circuit in the test unit make that the test unit simulated data is reliable.Owing to use the segmentation inductance, can realize following function in the test unit:
Generation through LC low-frequency vibration analog DC.At first charge to capacitor group C through constant current charger; Connect capacitor group C and whole section big inductance L loop then; Produce the low-frequency oscillation electric current, because the low-frequency oscillation power frequency is very low, oscillation period is greater than 20 times dc circuit breaker break; And the direct current interrupting process generally is selected near the low-frequency oscillation current peak, during this period of time in low-frequency current change very little.Therefore, for the direct current interrupting process, the low-frequency oscillation electric current can the Approximate Equivalent DC current.The amplitude that can regulate DC current through the size of adjustment capacitor group C charging voltage.
Produce the recovery superpotential at test product isolating switch BT1 and BT2 fracture two ends through the energy conversion of storing on the inductance L.Have no progeny at the dc circuit breaker branch; Because the energy stored charging of the capacitor C s in dc circuit breaker rapidly on the inductance L; Causing capacitor C s to go up voltage rises rapidly; When rising to lightning arrester MOV operation voltage, the lightning arrester action reaches under the simulation actual motion condition and bears the superpotential process of recovering after the dc circuit breaker blow-out.
Behind the current segmenting, let out the LC that can protect branch road the to pass through higher speed dump energy in the quick consumption test loop of vibrating in the test loop.This let out can holding circuit by an AC circuit breaker BP with let out the L1 section that the ability resistance R is connected the segmentation inductance and form.When any link in the process of the test goes wrong; Isolating switch in the closed holding circuit; Make this holding circuit insert, the whole test current in loop is through this holding circuit ground connection, energy through inductance L 1 and capacitor group C vibration and let out and can resistance R absorb; When dc circuit breaker electric current disjunction test is normally carried out; Behind the test product switch separating brake; Pass through pre-set time interval; The isolating switch BP of closed holding circuit, this moment, the effect of holding circuit comprised: 1, the test product switch breaking current that fails, the holding circuit road prevents the long-time arcing of test product switch and damages switch contact; 2, test product switch success breaking current, holding circuit make test loop ground connection, the formal transformation of energy through current oscillation become to let out can resistance thermal effect discharge.So, in any operating condition of test of electric current disjunction test, let out and can holding circuit can both play timely and effective protective effect the whole test loop.
Below in conjunction with the dc circuit breaker test loop, shown in accompanying drawing 2, be described in detail the use of test unit:
At first break off the fracture branch road of dc circuit breaker, connect constant current charger and capacitor group C, charge to capacitor group C with constant current charger; After reaching capacitor group C rated voltage; Disconnection capacitor group C is connected the fracture branch road of closed dc circuit breaker, promptly closed BT with constant current charger
1And BT
2Capacitor C, inductance L and dc circuit breaker fracture branch road form the loop, and capacitor C and inductance L low-frequency oscillation produce sinusoidal current, and in the time of near electric current arrives for four/one-period, electric current is very mild, can the analog DC source.
DC current flows through closed dc circuit breaker, and when reaching the breaking current peak value, the dc circuit breaker separating brake promptly breaks off BT
1And BT
2, after the blow-out of dc circuit breaker fracture, owing to stored lot of energy on the inductance L, the charging of the capacitor C s in dc circuit breaker rapidly, capacitor C s goes up voltage and rises rapidly, when recovery voltage rises to lightning arrester MOV operation voltage, lightning arrester MOV action.Reach under the simulation actual motion condition and bear the superpotential process of recovering after the dc circuit breaker blow-out.
Let out can holding circuit primary circuit for by an AC circuit breaker BP with let out the L1 section that the ability resistance R is connected the segmentation inductance and form.The secondary controlling Design is: the control signal wire that will let out the ability holding circuit is connected respectively to the test scram button of pilot system control interface and control desk.Test when unusual, press the scram button of control desk, let out and holding circuit to insert in the test loop, make whole test loop ground connection; When test is normally carried out; At first be provided with from test product switch separating brake and move time interval of breaker closing the holding circuit; This time interval was advisable with the normal arc time that is slightly larger than the test product switch; Start automatic control timing, let out and holding circuit after process preestablishes the time period, to insert the master trip loop.
Capacitor group constant current charger carries out rectification to the three-phase supply that inserts from transformer through the three-phase thyristor rectifier, changes the size of output charging DC current through the size of regulating the thyristor trigger angle; Capacitor group constant-current charge principle is as shown in Figure 3, accomplishes the automatic adjusting and the symmetric adjustment of three-phase of charging current value through the mode of close-loop feedback; After reaching the charging predetermined value,, protect charging device not receive the influence of other experiment links through being connected between charge switch deenergization and the capacitor group; After experiment finishes, accomplish releasing of capacitor group dump energy through grounding switch and stake resistance.
The charging device circuit is that three-phase transformer connects being electrically connected of rectifier.When charging for the capacitor group; The maximum charging current value that allows at first is set, capacitor group charging target voltage values is set, the charge switch of closed rectifier DC output terminal is the charging of capacitor group; After voltage to be charged reaches predetermined value; Charge switch between deenergization and the capacitor group, the storage of capacitor group energy finishes, and gets into the dc circuit breaker experimental phase.After the dc circuit breaker experiment is accomplished, connect the grounding switch of capacitor group, dump energy is released through stake resistance.
The utility model is described according to specific exemplary embodiment here.It will be conspicuous under the scope that does not break away from the utility model, carrying out suitable replacement to one skilled in the art or revise.Exemplary embodiment only is illustrative, rather than to the restriction of the scope of the utility model, the scope of the utility model is by appended claim definition.
Claims (4)
1. a dc circuit breaker electric current divides breaking test device, it is characterized in that said test unit comprises charging device, inductance L, holding circuit and test product circuit; Said inductance L comprises the segmentation inductance L
1With the segmentation inductance L
2, said holding circuit comprises the holding circuit isolating switch BP of series connection and lets out the ability resistance R that the test product circuit comprises test product circuit-breaker BT
1And BT
2, inductance L
s, capacitor C
sWith lightning arrester MOV.
2. a kind of dc circuit breaker electric current as claimed in claim 1 divides breaking test device, it is characterized in that in the said test product circuit test product circuit-breaker BT
1And BT
2Series arm, inductance L
sAnd capacitor C
sSeries arm and the parallel connection of lightning arrester MOV branch road.
3. a kind of dc circuit breaker electric current as claimed in claim 1 divides breaking test device; It is characterized in that said charging device comprise rectifier, transformer, be connected in said rectifier DC output terminal charge switch, with charge switch series capacitors group, stake resistance and grounding switch, said stake resistance is afterwards parallelly connected with said capacitor group with the grounding switch series connection.
4. a kind of dc circuit breaker electric current as claimed in claim 1 divides breaking test device, it is characterized in that said test product circuit and segmentation inductance L
2The series connection back is parallelly connected with said holding circuit, again with said segmentation inductance L
1Be composed in series the circuit-breaker testing loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203771811U CN202275145U (en) | 2011-09-30 | 2011-09-30 | Current breaking test apparatus for direct current breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203771811U CN202275145U (en) | 2011-09-30 | 2011-09-30 | Current breaking test apparatus for direct current breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202275145U true CN202275145U (en) | 2012-06-13 |
Family
ID=46195493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203771811U Expired - Lifetime CN202275145U (en) | 2011-09-30 | 2011-09-30 | Current breaking test apparatus for direct current breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202275145U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467314A (en) * | 2016-01-26 | 2016-04-06 | 云南电网有限责任公司电力科学研究院 | High voltage DC isolation switch performance detection device |
| CN105610148A (en) * | 2016-01-27 | 2016-05-25 | 张健 | High-voltage and large-power DC circuit breaker |
| CN106054069A (en) * | 2016-07-21 | 2016-10-26 | 国网山西省电力公司电力科学研究院 | High-voltage DC circuit breaker auxiliary circuit oscillation parameter testing device and testing method |
| CN106526473A (en) * | 2016-11-24 | 2017-03-22 | 华中科技大学 | Mechanical type high-voltage DC breaker on-off equivalent test loop and method |
| CN109061451A (en) * | 2018-06-25 | 2018-12-21 | 许继集团有限公司 | A kind of monitoring method and system of hybrid dc circuit breaker arrester |
| CN109507576A (en) * | 2018-11-20 | 2019-03-22 | 上海思源高压开关有限公司 | A kind of detection device for mechanical dc circuit breaker break performance |
| CN110346714A (en) * | 2019-08-22 | 2019-10-18 | 云南电网有限责任公司电力科学研究院 | Mimic-disconnecting switch operating condition operation method, device and line system, test equipment |
-
2011
- 2011-09-30 CN CN2011203771811U patent/CN202275145U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467314A (en) * | 2016-01-26 | 2016-04-06 | 云南电网有限责任公司电力科学研究院 | High voltage DC isolation switch performance detection device |
| CN105610148A (en) * | 2016-01-27 | 2016-05-25 | 张健 | High-voltage and large-power DC circuit breaker |
| CN105610148B (en) * | 2016-01-27 | 2018-12-21 | 张健 | High-tension high-power dc circuit breaker |
| CN106054069A (en) * | 2016-07-21 | 2016-10-26 | 国网山西省电力公司电力科学研究院 | High-voltage DC circuit breaker auxiliary circuit oscillation parameter testing device and testing method |
| CN106526473A (en) * | 2016-11-24 | 2017-03-22 | 华中科技大学 | Mechanical type high-voltage DC breaker on-off equivalent test loop and method |
| CN106526473B (en) * | 2016-11-24 | 2023-08-25 | 华中科技大学 | Mechanical high-voltage direct-current breaker breaking equivalent test loop and method |
| CN109061451A (en) * | 2018-06-25 | 2018-12-21 | 许继集团有限公司 | A kind of monitoring method and system of hybrid dc circuit breaker arrester |
| CN109507576A (en) * | 2018-11-20 | 2019-03-22 | 上海思源高压开关有限公司 | A kind of detection device for mechanical dc circuit breaker break performance |
| CN109507576B (en) * | 2018-11-20 | 2021-06-01 | 上海思源高压开关有限公司 | Detection apparatus for be used for mechanical type direct current breaker performance of opening and shutting |
| CN110346714A (en) * | 2019-08-22 | 2019-10-18 | 云南电网有限责任公司电力科学研究院 | Mimic-disconnecting switch operating condition operation method, device and line system, test equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140326 Owner name: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140326 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100192 HAIDIAN, BEIJING TO: 100031 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140326 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Patentee before: China Electric Power Research Institute |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120613 |
|
| CX01 | Expiry of patent term |