CN106207949A - A kind of method protecting charging current limiter resistance - Google Patents
A kind of method protecting charging current limiter resistance Download PDFInfo
- Publication number
- CN106207949A CN106207949A CN201610703866.8A CN201610703866A CN106207949A CN 106207949 A CN106207949 A CN 106207949A CN 201610703866 A CN201610703866 A CN 201610703866A CN 106207949 A CN106207949 A CN 106207949A
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- Prior art keywords
- current
- breaker
- resistance
- circuit
- outfan
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/025—Disconnection after limiting, e.g. when limiting is not sufficient or for facilitating disconnection
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of method protecting charging current limiter resistance, comprise the following steps: first at the outfan series connection miniature circuit breaker of current-limiting resistance, form series branch；At the series branch's two ends parallel connection hypervelocity section breaker connected, it is combined into mixed type shunt trip breaker；At current-limiting resistance two ends parallel connection constant value additional resistance, after being connected by pulsed capacitance C, it is connected in parallel on hypervelocity section breaker two ends with high-power thyristor；At the outfan extracted current sensor of mixed type shunt trip breaker, and being connected to current comparator, the outfan of current comparator is connected to the gate lead of high-power thyristor；Switching on power, circuit is started working, and fault detect decision circuitry judges whether to break down and send actuating signal；After receiving signal, ultra fast breaker starts action and carries out the change of current: last current limliting segmentation, completes the excision of whole short trouble branch road.The overall specified through-current capability of the present invention is strong, and breaking speed is fast, and short-circuit detecting is swift with judgement.
Description
Technical field
The present invention relates to circuit protection field, particularly relate to a kind of method protecting charging current limiter resistance.
Background technology
Current-limiting resistance is often series in circuit, in order to limit the size of place branch current, burns out in case electric current is excessive
The components and parts connected.Current-limiting resistance also can play dividing potential drop effect simultaneously.Existing current-limiting resistance kind material is various, outside application
Enclose circuit also to beat and differ, such as: emerging power electronics type current-limiting apparatus is swift in motion, and can unlimited repeat to make in theory
With, it is possible to the rapid increase of suppression short circuit current, but on-state loss is relatively big and the rated voltage of power electronic devices itself with
The restriction of electric current is its major defect；High-temperature superconductor type current limiter utilizes the superconductor characteristic that quenches under given conditions
Becoming short circuit current to limit, quick action and reusable, is optimal short circuit current limitation scheme, but at present due to material and
The technical reasons such as cooling, are in test and conceptual phase；It addition, the most with equal with the high-temperature superconductor type current-limiting apparatus of trail run
Volume is relatively big, and the actual application of distance low-voltage power system also has a segment distance.
Summary of the invention
For problem above, the present invention proposes a kind of method protecting charging current limiter resistance, and the present invention is overall specified through-flow
Ability is strong, and breaking speed is fast, and short-circuit detecting is swift with judgement, can effectively solve the problem in background technology.
To this end, the invention provides a kind of method protecting charging current limiter resistance, comprise the following steps:
S1: build mixed type shunt trip breaker: first at the outfan series connection miniature circuit breaker of current-limiting resistance, form series connection
Branch；At the series branch's two ends parallel connection hypervelocity section breaker connected, it is combined into mixed type shunt trip breaker；
S2: add auxiliary circuit in parallel: at current-limiting resistance two ends parallel connection constant value additional resistance, by pulsed capacitance C and big merit
It is connected in parallel on after rate Thyristors in series between the input/output terminal of hypervelocity section breaker；
S3: add fault detect decision circuitry: at the outfan extracted current sensor of mixed type shunt trip breaker, and
Arranging current comparator, the in-phase input end at current comparator introduces reference voltage, then by the output of current sensor
It is galvanically connected to the inverting input of current comparator；
S4: add on-off control circuit: the outfan of current comparator is connected to the gate lead of high-power thyristor, mixed
It is connected to power supply lead wire between the input of mould assembly shunt trip breaker；
S5: electric circuit inspection judges: switching on power, circuit is started working, and fault detect decision circuitry is big by electric current f amplitude
Little and current-rising-rate di/dt comes whether comprhensive deterministic system is in short circuit, sends protection act at once when fault being detected
Signal；
S6: high-speed switch action and the change of current: after receiving protection act signal, high-power thyristor D is become by cut-off and leads
Logical, pulsed capacitance C discharges rapidly, through the intrinsic disjunction movement time of hypervelocity section breaker, start the action moment from contact,
Ultra fast breaker and current-limiting resistor element branch road start the change of current, and after a period of time, the complete change of current is to series arm；
S7: current limliting segmentation: after the change of current, series arm electric current continues to rise so that current-limiting resistance enters high-impedance state, system
Short circuit current is limited to a less value, and fault detect decision circuitry is providing IGCT D reclosing command simultaneously, time delay one
The section time (this time is more than the resistance C-element current limliting time) also judges that now electric current has been limited to sufficiently small amplitude the most, then
Start output current limiting resistance disjunction instruction, complete the excision of whole short trouble branch road.
As a kind of preferably technical scheme of the present invention, described ultra fast breaker uses and drives based on thomson electromagnetic repulsion force
The electromagnetic switch of principle, is driven coil, movement of metallic dish, switch contact and repulsion to drive coil driver structure by repulsion
Becoming, its moving coil and switch movable contact are designed as integrative-structure, and repulsion drives coil position corresponding to immediately below moving coil；From giving
Go out disjunction and instruct within time of circuit disjunction can be controlled in 150u.
As a kind of preferably technical scheme of the present invention, described fault detect decision circuitry sets 2 current amplitude bases
Value Iset1 and Iset2, wherein Iset1 is breakdown judge enabling gate threshold value, and Iset2 is threshold upper limit working value.
As a kind of preferably technical scheme of the present invention, during system worked well, miniature circuit breaker and hypervelocity section breaker
Being in closure state, now parallel branch is essentially according to branch resistance value size static splitting.
As a kind of preferably technical scheme of the present invention, during system failure, current-limiting resistance circuit presents low resistive state,
Now electric capacity C is in charging complete state, and high-power thyristor D ends.
As a kind of preferably technical scheme of the present invention, described current sensor uses LT508 type LEM Hall current sensing
Device.
A kind of method protecting charging current limiter resistance that the present invention proposes, utilizes ultra fast breaker with current-limiting resistance branch road also
Connection, utilizes failure detector circuit carry out fault detect and realize automatic protection switching, has reached following beneficial effect: (1) device
Overall specified through-current capability is strong, adapts to the environmental applications requirement of low-voltage, high-current；(2) overall breaking speed is fast: utilize miniature disconnected
Road device coordinates with ultra fast breaker, can make full use of the characteristic that PTC-element sudden change of resistivity is fast；(3) reduce for current-limiting resistance
Specified through-flow requirement with miniature circuit breaker；(4) short-circuit detecting is swift with judgement, is more beneficial for short circuit initial stage suppression fault current
Increase, and can quickly realize selective protection.
Accompanying drawing explanation
Fig. 1 is a kind of method flow diagram protecting charging current limiter resistance of the present invention.
Fig. 2 is experiment circuit theory diagrams of the present invention.
Fig. 3 is the short circuit current limitation test waveform figure setting Iset1=50A, Iset2=100A.
Fig. 4 is the short circuit current limitation test waveform figure setting Iset1=200A, Iset2=250A.
Detailed description of the invention
Below, by specific embodiment, technical scheme is described in detail.
Seeing figures.1.and.2, the present invention proposes a kind of method protecting charging current limiter resistance, comprises the following steps: S1:
Build mixed type shunt trip breaker: first at the outfan series connection miniature circuit breaker of current-limiting resistance, form series branch；Connecting
Good series branch's two ends parallel connection hypervelocity section breaker, is combined into mixed type shunt trip breaker；
S2: add auxiliary circuit in parallel: at current-limiting resistance two ends parallel connection constant value additional resistance, by pulsed capacitance C and big merit
It is connected in parallel on after rate Thyristors in series between the input/output terminal of hypervelocity section breaker；
S3: add fault detect decision circuitry: at the outfan extracted current sensor of mixed type shunt trip breaker, and
Arranging current comparator, the in-phase input end at current comparator introduces reference voltage, then by the output of current sensor
It is galvanically connected to the inverting input of current comparator；
S4: add on-off control circuit: the outfan of current comparator is connected to the gate lead of high-power thyristor, mixed
It is connected to power supply lead wire between the input of mould assembly shunt trip breaker；
S5: electric circuit inspection judges: switching on power, circuit is started working, and fault detect decision circuitry is big by electric current f amplitude
Little and current-rising-rate di/dt comes whether comprhensive deterministic system is in short circuit, sends protection act at once when fault being detected
Signal；
S6: high-speed switch action and the change of current: after receiving protection act signal, high-power thyristor D is become by cut-off and leads
Logical, pulsed capacitance C discharges rapidly, through the intrinsic disjunction movement time of hypervelocity section breaker, start the action moment from contact,
Ultra fast breaker and current-limiting resistor element branch road start the change of current, and after a period of time, the complete change of current is to series arm；
S7: current limliting segmentation: after the change of current, series arm electric current continues to rise so that current-limiting resistance enters high-impedance state, system
Short circuit current is limited to a less value, and fault detect decision circuitry is providing IGCT D reclosing command simultaneously, time delay one
The section time (this time is more than the resistance C-element current limliting time) also judges that now electric current has been limited to sufficiently small amplitude the most, then
Start output current limiting resistance disjunction instruction, complete the excision of whole short trouble branch road.
Described ultra fast breaker uses electromagnetic switch based on thomson electromagnetic repulsion force driving principle, repulsion drive
Coil, movement of metallic dish, switch contact and repulsion drive coil driver to constitute, and its moving coil is designed as with switch movable contact
Integrative-structure, repulsion drives coil position corresponding to immediately below moving coil；Can from the time providing disjunction and instructing circuit disjunction
Control within 150u；Described fault detect decision circuitry sets 2 current amplitude base value Iset1 and Iset2, wherein
Iset1 is breakdown judge enabling gate threshold value, and Iset2 is threshold upper limit working value；Miniature circuit breaker is all located with hypervelocity section breaker
In closure state, now parallel branch is essentially according to branch resistance value size static splitting；Current-limiting resistance electricity during system failure
Presenting low resistive state in road, now electric capacity C is in charging complete state, and high-power thyristor D ends；Described current sensor is adopted
With LT508 type LEM Hall current sensor.
Guard method in embodiment is tested by the present invention, and experimental result picture is as shown in Figure 3 and Figure 4.
Experiment parameter sets: system short-circuit protective current climbing threshold value di/dt=100A/ms, and exceed the speed limit section breaker
Detecting that parallel branch electric current is less than time delay 5ms disjunction after 20A.
From Fig. 3 and Fig. 4, in the detection judgement stage, owing to accumulator battery short circuit current climbing is more than setting value di/
Dt=100A/ms, therefore detection decision circuitry is when flowing through high-speed switch electric current equal to 100 and 250A, output is supper-fast rapidly opens
Close action command；
In ultra fast breaker action and change of current stage, turn on thyristors makes electric capacity discharge rapidly, and its action moment is to electricity
Flow measurement waveform brings certain interference, and the intrinsic break of ultra fast breaker through about 150us, short circuit current is gradually
The change of current is to series arm, when Iset2 is respectively 100 and 250A, flow through high-speed switch branch current peak value be respectively 218A and
384A；
In the current limliting disjunction stage, resistance increases the moment, and system power declines therewith, only in 2.75 and 2.2ms, and current limliting
Prospective short circuit current can be limited in rapidly below 390A from about 1000A by resistance,.Short circuit current is limited in ultra fast breaker can
In the range of disjunction；
From above-mentioned test data it can be seen that along with set short-circuit current value increase, ultra fast breaker branch current
Peak value dramatically increases；After the change of current, the resistance of current-limiting resistance increases accordingly, is decreased obviously, in figure before the branch current relatively change of current
Visible, the change of current complete moment series arm electric current the most corresponding 205 and 278A；Meanwhile, along with flowing through the increase of electric current, current limliting electricity
The change in resistance of resistance is accelerated, and reduces the most therewith movement time；Under aforementioned different current limlitings impose a condition, current limliting break by
2.75ms shortens to 2.2ms, and series arm correspondence peak-peak is respectively 390 and 330A, it is clear that the correspondence that initial current is bigger
Current limitation effect preferable.
A kind of method protecting charging current limiter resistance that the present invention proposes, utilizes ultra fast breaker with current-limiting resistance branch road also
Connection, utilizes failure detector circuit carry out fault detect and realize automatic protection switching, has reached following beneficial effect: (1) device
Overall specified through-current capability is strong, adapts to the environmental applications requirement of low-voltage, high-current；(2) overall breaking speed is fast: utilize miniature disconnected
Road device coordinates with ultra fast breaker, can make full use of the characteristic that PTC-element sudden change of resistivity is fast；(3) reduce for current-limiting resistance
Specified through-flow requirement with miniature circuit breaker；(4) short-circuit detecting is swift with judgement, is more beneficial for short circuit initial stage suppression fault current
Increase, and can quickly realize selective protection.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, according to technical scheme and
Inventive concept equivalent or change in addition, all should contain within protection scope of the present invention.
Claims (6)
1. the method protecting charging current limiter resistance, it is characterised in that comprise the following steps:
S1: build mixed type shunt trip breaker: first at the outfan series connection miniature circuit breaker of current-limiting resistance, form series connection point
?；At the series branch's two ends parallel connection hypervelocity section breaker connected, it is combined into mixed type shunt trip breaker；
S2: add auxiliary circuit in parallel: at current-limiting resistance two ends parallel connection constant value additional resistance, by pulsed capacitance C and high-power crystalline substance
It is connected in parallel on after brake tube series connection between the input/output terminal of hypervelocity section breaker；
S3: add fault detect decision circuitry: at the outfan extracted current sensor of mixed type shunt trip breaker, and arrange
Current comparator, the in-phase input end at current comparator introduces reference voltage, then by the output electric current of current sensor
It is connected to the inverting input of current comparator；
S4: add on-off control circuit: the outfan of current comparator is connected to the gate lead of high-power thyristor, mixed type
It is connected to power supply lead wire between the input of shunt trip breaker；
S5: electric circuit inspection judges: switching on power, circuit is started working, fault detect decision circuitry by electric current f amplitude size and
Current-rising-rate di/dt comes whether comprhensive deterministic system is in short circuit, sends protection act signal at once when fault being detected；
S6: high-speed switch action and the change of current: after receiving protection act signal, high-power thyristor D is become conducting, arteries and veins by cut-off
Rush electric capacity C to discharge rapidly, through the intrinsic disjunction movement time of hypervelocity section breaker, start the action moment from contact, ultrafast
Speed switch starts the change of current with current-limiting resistor element branch road, and after a period of time, the complete change of current is to series arm；
S7: current limliting segmentation: after the change of current, series arm electric current continues to rise so that current-limiting resistance enters high-impedance state, system short-circuit
Electric current is limited to a less value, and fault detect decision circuitry is providing IGCT D reclosing command simultaneously, during time delay one section
Between (this time more than resistance C-element current limliting time) judge that now electric current has been limited to sufficiently small amplitude the most, then starts
Output current limiting resistance disjunction instructs, and completes the excision of whole short trouble branch road.
A kind of method protecting charging current limiter resistance the most according to claim 1, it is characterised in that described ultra fast breaker
Use electromagnetic switch based on thomson electromagnetic repulsion force driving principle, repulsion drive coil, movement of metallic dish, switch to touch
Head and repulsion drive coil driver to constitute, and its moving coil and switch movable contact are designed as integrative-structure, and repulsion drives coil
Position is corresponding to immediately below moving coil；Within the time providing disjunction and instructing circuit disjunction can be controlled in 150us.
A kind of method protecting charging current limiter resistance the most according to claim 1, it is characterised in that described fault detect is sentenced
Setting 2 current amplitude base value Iset1 and Iset2 in deenergizing, wherein Iset1 is breakdown judge enabling gate threshold value, and Iset2 is
Threshold upper limit working value.
A kind of method protecting charging current limiter resistance the most according to claim 1, it is characterised in that system worked well
Time, miniature circuit breaker is in closure state with hypervelocity section breaker, and now parallel branch is essentially according to branch resistance value size
Static splitting.
A kind of method protecting charging current limiter resistance the most according to claim 1, it is characterised in that system failure time limit
Presenting low resistive state in leakage resistance circuit, now electric capacity C is in charging complete state, and high-power thyristor D ends.
A kind of method protecting charging current limiter resistance the most according to claim 1, it is characterised in that described current sensor
Use LT508 type LEM Hall current sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610703866.8A CN106207949A (en) | 2016-08-23 | 2016-08-23 | A kind of method protecting charging current limiter resistance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610703866.8A CN106207949A (en) | 2016-08-23 | 2016-08-23 | A kind of method protecting charging current limiter resistance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786430A (en) * | 2017-01-19 | 2017-05-31 | 上海电气集团股份有限公司 | A kind of discriminating conduct of short circuit malfunction |
| CN110783151A (en) * | 2019-10-31 | 2020-02-11 | 南京亚派科技股份有限公司 | Simple instantaneous and rapid breaking structure of miniature circuit breaker |
| CN110907787A (en) * | 2018-09-17 | 2020-03-24 | 国网浙江省电力公司 | IGCT drive circuit high-temperature characteristic batch detection device and method |
| CN113541488A (en) * | 2021-06-28 | 2021-10-22 | 中车青岛四方机车车辆股份有限公司 | Boost chopper circuit, protection circuit, control method, equipment and vehicle |
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| US6628485B1 (en) * | 1999-06-17 | 2003-09-30 | Abb Research Ltd | Apparatus for limiting an electrical current |
| CN101604835A (en) * | 2009-06-05 | 2009-12-16 | 湖南省电力公司试验研究院 | A kind of fault current limiter based on high-speed switch and Triggered Vacuum Switch |
| CN103683209A (en) * | 2013-12-11 | 2014-03-26 | 华电智网（天津）科技有限公司 | Identifying method based on high-speed switch type serial compensation system and controller thereof |
| CN105429121A (en) * | 2015-12-28 | 2016-03-23 | 大连理工大学 | Hybrid switch-type fault current limiting module and device |
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2016
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6628485B1 (en) * | 1999-06-17 | 2003-09-30 | Abb Research Ltd | Apparatus for limiting an electrical current |
| CN101604835A (en) * | 2009-06-05 | 2009-12-16 | 湖南省电力公司试验研究院 | A kind of fault current limiter based on high-speed switch and Triggered Vacuum Switch |
| CN103683209A (en) * | 2013-12-11 | 2014-03-26 | 华电智网（天津）科技有限公司 | Identifying method based on high-speed switch type serial compensation system and controller thereof |
| CN105429121A (en) * | 2015-12-28 | 2016-03-23 | 大连理工大学 | Hybrid switch-type fault current limiting module and device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786430A (en) * | 2017-01-19 | 2017-05-31 | 上海电气集团股份有限公司 | A kind of discriminating conduct of short circuit malfunction |
| CN106786430B (en) * | 2017-01-19 | 2018-12-18 | 上海电气集团股份有限公司 | A kind of discriminating conduct of short circuit malfunction |
| CN110907787A (en) * | 2018-09-17 | 2020-03-24 | 国网浙江省电力公司 | IGCT drive circuit high-temperature characteristic batch detection device and method |
| CN110783151A (en) * | 2019-10-31 | 2020-02-11 | 南京亚派科技股份有限公司 | Simple instantaneous and rapid breaking structure of miniature circuit breaker |
| CN113541488A (en) * | 2021-06-28 | 2021-10-22 | 中车青岛四方机车车辆股份有限公司 | Boost chopper circuit, protection circuit, control method, equipment and vehicle |
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