CN102593787A - Low-current disjunction device and disjunction method for direct-current distribution system - Google Patents
Low-current disjunction device and disjunction method for direct-current distribution system Download PDFInfo
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- CN102593787A CN102593787A CN2012100412214A CN201210041221A CN102593787A CN 102593787 A CN102593787 A CN 102593787A CN 2012100412214 A CN2012100412214 A CN 2012100412214A CN 201210041221 A CN201210041221 A CN 201210041221A CN 102593787 A CN102593787 A CN 102593787A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 9
- 239000010703 silicon Substances 0.000 claims abstract description 9
- 238000012546 transfer Methods 0.000 claims abstract description 9
- 239000013078 crystal Substances 0.000 claims description 8
- 230000003750 conditioning effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000010891 electric arc Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The invention discloses a medium-voltage direct-current (DC) circuit breaker transfer type low-current disjunction device and disjunction method. According to the invention, the low-current disjunction transfer branch circuit is composed of a DC contactor and a controllable silicon thyristor by connection in series. In the process of switching on/off low current, the low-current detection judgment control device emits a signal to trigger the controllable thyristor to be conducted, so that the low current to be subjected to disjunction is transferred to the DC contactor branch circuit. Because the current is very low, the current is safely and quickly subjected to disjunction by selecting a proper DC contactor, and finally the process of transferring and disjunction of the low current is finished. The device is simple in structure and reasonable in layout, the equipment work reliability is improved on the premise that the fault low current is guaranteed to be successfully subjected to disjunction, the manufacturing cost is low, and disjunction device and disjunction method are suitable for popularization and application.
Description
Technical field
The present invention designs the little electric current break-up device of a kind of middle straightening stream circuit breaker, middle straightening stream little electric current break-up device of circuit breaker transfer type and method for dividing thereof that particularly a kind of direct-flow distribution system is used.
Background technology
Development along with direct current machine, electric semiconductor, electrical power storage, renewable energy power generation, fuel cell technology; The advantage of direct current supply constantly manifests; People begin to pay attention to again the prospect of direct current supply; Getting in touch of DC power-supply system and industrial development and the common people's daily life is also more tight, and in many important industries such as China's smelting, chemical industry, medical treatment, mine, has obtained using widely.Wherein, dc circuit breaker has the defencive function of reliable cut-out DC loop fault electric current, is the assurance of DC power-supply system safe operation.Develop rapidly and the progressively modern while of industrial traffic in China's economy, also more strict to the requirement of DC power-supply system reliability, the break performance to dc circuit breaker has proposed increasingly high requirement thus.
In the DC distribution net, when circuit breaks down or receives separating brake when instruction, require circuit breaker in the shortest time with its disjunction.Specifically, after the circuit breaker dynamic/static contact separated, the electric arc between contact leaned on the separation of contact on the one hand and is elongated (parallel arc direction of principal axis) by the tangential, can be elongated (vertical arc direction of principal axis) by normal direction because of the magnetic field that the galvanic circle electric current is produced on the other hand.Wherein, normal direction is elongated electric arc not only makes arc length increase, and also makes electric arc produce transverse movement, and makes electric arc get into the grid sheet rapidly to cut and cool off, electric arc is extinguished rapidly.When the current value of disjunction is big, contact and to run arc road regional magnetic field intensity bigger, electric arc is obvious to self magnetic blow-out and air-blowing effect, and therefore the fault current of amplitude is easier to cut-off greatly.But when cut-offfing less fault current, magnetic blow-out and air-blowing effect obviously weaken, and the cross force that little arc current receives is too small; Causing electric arc can not get into the grid sheet rapidly cools off and cuts; But rest on long-time sustained combustion between the contact, cause dynamic/static contact seriously to ablate, spillage of material; Contact surface localized metallic drop splashes, and finally causes cut-offfing failure.Therefore, the little arc current disjunction of circuit breaker is the emphasis and the difficult point of middle straightening stream circuit breaker and the research of related switch electrical apparatus industry thereof always.
Summary of the invention
The objective of the invention is to: utilize D.C. contactor and silicon controlled crystal brake pipe to constitute carry circuit; Design also provides straightening stream circuit breaker in a kind of being applied to, and can shift quickly and safely and the device of successful disjunction small magnitude fault current and shift method for dividing.
Straightening stream circuit breaker, D.C. contactor, silicon controlled crystal brake pipe, little current detecting judgment means and signal conditioning circuit thereof during little electric current break-up device and method for dividing thereof that a kind of direct-flow distribution system is used, little electric current break-up device comprise.
Said D.C. contactor and silicon controlled crystal brake pipe series connection constitute little electric current disjunction and shift branch road;
Said D.C. contactor is as a normally-closed contact;
It is parallelly connected with dc circuit breaker master fracture that branch road is shifted in said little electric current disjunction;
Said little current monitoring judgment means is used for detecting the electric current that flows through major loop, and the current amplitude size is judged; If little electric current cut-offs then output action signal,, signal conditioning circuit delivers to gate circuit transistor gate after amplifying, trigger the thyristor conducting.
D.C. contactor is as a normally closed switch, and the formation of connecting with thyristor shifts branch road.When the breaker closing normally carried rated current, because thyristor does not have triggering signal to make its conducting, it was obstructed to shift branch road, the circuit breaker master fracture so rated operational current is flowed through.When carrying out the cut-offfing of short circuit current, the break current value of major loop of little current detecting judges that control device will be measured and judgement need be cut-off, the dc circuit breaker of flowing through.If this current value greater than set point, does not reach the size of critical little electric current, then this fault current is by the disjunction safely and fast of dc circuit breaker major loop; If this current value reaches or is lower than little current setting value; Little current detecting judgement control system can be sent actuating signal; This signal triggers the thyristor conducting after conditioning is amplified, because the main fracture of circuit breaker is opened, need the little electric current of disjunction can be transferred on the D.C. contactor loop.Because this electric current is very little, the D.C. contactor of low capacity can finally be accomplished the transfer and the breaking course of little electric current safely and fast with its disjunction.
Description of drawings
Fig. 1 is the little electric current break-up device used of a kind of direct-flow distribution system and the circuit connection diagram of method for dividing thereof.
Fig. 2 is the little electric current break-up device used of a kind of direct-flow distribution system and the current transfer procedure chart of method for dividing thereof.
Wherein: QF is that middle straightening stream circuit breaker, KM are that D.C. contactor, T1 are that silicon controlled crystal brake pipe, 1 is little current detecting judgment means.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Referring to accompanying drawing, the little electric current break-up device of this middle straightening stream circuit breaker partly is made up of middle straightening stream circuit breaker Q F, D.C. contactor KM, silicon controlled crystal brake pipe T1, little current detecting judgment means and signal conditioning circuit thereof etc.
Wherein, D.C. contactor KM constitutes little electric current disjunction transfer branch road as a normally-closed contact and silicon controlled crystal brake pipe T1 series connection, and it is parallelly connected with dc circuit breaker master fracture QF that branch road is shifted in this little electric current disjunction.Said little current monitoring judgment means is used for detecting the electric current that flows through major loop, and the current amplitude size is judged, if little electric current cut-offs then output action signal.This actuating signal is delivered to thyristor T1 gate pole behind modulate circuit, as the triggering signal of thyristor, trigger its conducting.
When closed normally of circuit breaker Q F and carrying rated current, because thyristor T1 does not have triggering signal to make its conducting, it is obstructed to shift branch road, the circuit breaker master fracture QF so rated operational current is flowed through.In cut-offfing the process of fault current, the current value of the dc circuit breaker QF major loop of flowing through will be measured and declared to little current detecting judgement control system.If this current value greater than set point, does not reach the size of critical little electric current, then this fault current is by dc circuit breaker QF disjunction safely and fast; If this current value reaches or is lower than little current setting value, little current detecting judges that control device can send actuating signal, and this signal as triggering signal, makes thyristor T1 conducting after nursing one's health, therefore shift the branch road conducting.This moment, circuit breaker master fracture QF broke off, and the little current transfer that needs disjunction is to D.C. contactor KM.Because this electric current is very little, select the D.C. contactor of low capacity finally to accomplish the process of transfer and the little electric current of disjunction safely and fast with its disjunction.
Above content is to combine concrete preferred implementation to further explain that the present invention did; Can not assert that embodiment of the present invention only limits to this; Those of ordinary skill for technical field under the present invention; Under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to the present invention and confirm scope of patent protection by claims of being submitted to.
Claims (2)
1. little electric current break-up device that direct-flow distribution system is used is characterized in that:
The little electric current break-up device that this direct-flow distribution system is used, straightening stream circuit breaker, D.C. contactor, silicon controlled crystal brake pipe, little current detecting judgment means and signal conditioning circuit thereof in comprising;
Said D.C. contactor and silicon controlled crystal brake pipe series connection constitute little electric current disjunction and shift branch road;
Said D.C. contactor is as a normally-closed contact;
It is parallelly connected with dc circuit breaker master fracture that branch road is shifted in said little electric current disjunction;
Said little current monitoring judgment means is used for detecting the electric current that flows through major loop, and the current amplitude size is judged;
The current signal of said little current detecting judgment means output is delivered to gate circuit transistor gate behind modulate circuit, as the thyristor triggering signal, make its conducting.
2. the method for dividing of the little electric current break-up device of using based on the described a kind of direct-flow distribution system of claim 1 is characterized in that:
D.C. contactor is as a normally closed switch, and the formation of connecting with thyristor shifts branch road; When breaker closing normally and carrying rated current, because thyristor does not have triggering signal to make its conducting, it is obstructed to shift branch road, the circuit breaker master fracture so rated operational current is flowed through; When carrying out the cut-offfing of short circuit current, the break current value of major loop of little current detecting judges that the control assembling system will be measured and judgement need be cut-off, the dc circuit breaker of flowing through; If this current value greater than set point, does not reach the size of critical little electric current, then this fault current is by the disjunction safely and fast of dc circuit breaker major loop; If this current value reaches or is lower than little current setting value; Little current detecting judgement control system can be sent actuating signal; This signal triggers the thyristor conducting after conditioning is amplified, because the main fracture of circuit breaker is opened, need the little electric current of disjunction can be transferred on the D.C. contactor loop; Because this electric current is very little, the D.C. contactor of low capacity can finally be accomplished the transfer and the breaking course of little electric current safely and fast with its disjunction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210041221 CN102593787B (en) | 2012-02-22 | 2012-02-22 | Low-current disjunction device and disjunction method for direct-current distribution system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210041221 CN102593787B (en) | 2012-02-22 | 2012-02-22 | Low-current disjunction device and disjunction method for direct-current distribution system |
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| CN102593787A true CN102593787A (en) | 2012-07-18 |
| CN102593787B CN102593787B (en) | 2013-07-17 |
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| CN 201210041221 Expired - Fee Related CN102593787B (en) | 2012-02-22 | 2012-02-22 | Low-current disjunction device and disjunction method for direct-current distribution system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219698A (en) * | 2013-02-06 | 2013-07-24 | 西安交通大学 | Mixing type direct-current breaker |
| CN106099841A (en) * | 2015-04-28 | 2016-11-09 | 通用电气公司 | DC circuit-breaker and the method for use |
| CN109725189A (en) * | 2017-10-31 | 2019-05-07 | 丹阳百斯特智能系统有限公司 | A kind of household electric current detecting method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1066251A (en) * | 1996-08-13 | 1998-03-06 | Sony Corp | Protective device for secondary battery |
| CN201113378Y (en) * | 2007-06-29 | 2008-09-10 | 东莞大朗金准电器厂 | Electronic current-limiting device |
| CN201122833Y (en) * | 2007-11-19 | 2008-09-24 | 海尔集团公司 | Micro-controlled electricity-saving protection device |
| CN101340097A (en) * | 2008-05-17 | 2009-01-07 | 曾卫民 | Intelligent modularized reactive compensator |
-
2012
- 2012-02-22 CN CN 201210041221 patent/CN102593787B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1066251A (en) * | 1996-08-13 | 1998-03-06 | Sony Corp | Protective device for secondary battery |
| CN201113378Y (en) * | 2007-06-29 | 2008-09-10 | 东莞大朗金准电器厂 | Electronic current-limiting device |
| CN201122833Y (en) * | 2007-11-19 | 2008-09-24 | 海尔集团公司 | Micro-controlled electricity-saving protection device |
| CN101340097A (en) * | 2008-05-17 | 2009-01-07 | 曾卫民 | Intelligent modularized reactive compensator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219698A (en) * | 2013-02-06 | 2013-07-24 | 西安交通大学 | Mixing type direct-current breaker |
| CN103219698B (en) * | 2013-02-06 | 2015-05-20 | 西安交通大学 | Mixing type direct-current breaker |
| CN106099841A (en) * | 2015-04-28 | 2016-11-09 | 通用电气公司 | DC circuit-breaker and the method for use |
| CN106099841B (en) * | 2015-04-28 | 2019-07-19 | 通用电气公司 | DC circuit-breaker and the method used |
| CN109725189A (en) * | 2017-10-31 | 2019-05-07 | 丹阳百斯特智能系统有限公司 | A kind of household electric current detecting method |
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| CN102593787B (en) | 2013-07-17 |
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Application publication date: 20120718 Assignee: Xi'an Xikai Medium-Low Pressure Switch Co.,Ltd. Assignor: Xi'an Jiaotong University Contract record no.: 2015610000044 Denomination of invention: Low-current disjunction device and disjunction method for direct-current distribution system Granted publication date: 20130717 License type: Common License Record date: 20150511 |
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Granted publication date: 20130717 |