CN102593809B - Solid-state circuit breaker with over-voltage suppressing function - Google Patents
Solid-state circuit breaker with over-voltage suppressing function Download PDFInfo
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- CN102593809B CN102593809B CN201110008352.8A CN201110008352A CN102593809B CN 102593809 B CN102593809 B CN 102593809B CN 201110008352 A CN201110008352 A CN 201110008352A CN 102593809 B CN102593809 B CN 102593809B
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- diode
- branch road
- pressure limiting
- circuit breaker
- limiting branch
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Abstract
The invention relates to a solid-state circuit breaker with an over-voltage suppressing function. The solid-state circuit breaker comprises a main breakover loop and a follow current voltage limiting circuit branch, wherein an output end of the main breakover loop is connected with one end of the follow current voltage limiting circuit branch, the other end of the follow current voltage limiting circuit branch is grounded, and the main breakover loop is switched off after the follow current voltage limiting circuit branch is switched on and a set time is delayed. Compared with the prior art, the solid-state circuit breaker disclosed by the invention has the advantages of over-voltage suppressing function, high action speed, strong controllability and the like.
Description
Technical field
The present invention relates to a kind of circuit breaker, especially relate to a kind of solid circuit breaker with Overvoltage suppressing function.
Background technology
Due to micro power network access and with the generating equipment managed be usually and environment, the closely-related wind energy of weather conditions, solar power generation, energy output is relatively unstable, in order to the voltage keeping micro-capacitance sensor user oriented can provide stable, except setting up a series of energy storage device, micro power network inside also needs to carry out regulable control neatly to generation of electricity by new energy, need installing responsiveness switchgear rapidly, and due to the switch (as: oil circuit breaker based on mechanical action, SF6 circuit breaker, vacuum circuit-breaker) responsiveness is slow, the intellectuality being difficult to realize system controls flexibly.In order to safeguard the stable operation of micro power network, circuit breaker being had higher requirement, wishing that its responsiveness is faster, control precision is higher, and such performance, conventional circuit breaker is difficult to reach at present.
Solid circuit breaker is novel without fracture switchgear based on power electronic device, thus possess far away from traditional mechanical type breaker actuation speed, its operate time is at Microsecond grade, can disconnect in the designated phase of voltage or electric current or close by realizing circuit exactly, the strict demand of micro-capacitance sensor switching devices can be met.Coordinate fault current limiter to use, faulty line just can cut off when short circuit current does not also significantly raise by solid circuit breaker, substantially increases the stability of electrical network.Because solid circuit breaker does not have fracture, on the one hand, can not electric arc be produced in switching process, improve the useful life of circuit breaker, also can cause but then producing too high cut-off overvoltage in interrupting process.Overvoltage is the main cause that switch element damages, and is also the difficult point place of solid circuit breaker exploitation, in the exploitation of solid circuit breaker, in order to improve the withstand voltage level of switch, has to adopt the switching device of higher withstand voltage level.The present invention increases afterflow branch road in solid circuit breaker, for fault current provides exergonic passage, significantly suppresses fault current to cut-off caused overvoltage, for the solid circuit breaker development of voltage levels provides brand-new method.
Summary of the invention
Object of the present invention be exactly in order to overcome above-mentioned prior art exist defect and a kind of solid circuit breaker with Overvoltage suppressing function is provided.
Object of the present invention can be achieved through the following technical solutions:
A kind of solid circuit breaker with Overvoltage suppressing function, it is characterized in that, comprise leading logical loop, afterflow pressure limiting branch road, the output in described leading logical loop is connected with one end of afterflow pressure limiting branch road, the other end ground connection of described afterflow pressure limiting branch road, first conducting afterflow pressure limiting branch road before leading logical loop turns off, turns off leading logical loop again after postponing setting-up time.
Described leading logical loop is formed by multiple onunit connection in series-parallel, and the quantity of described onunit determines according to the capacity of the rated voltage of environment for use and fault current.
Described onunit comprises 2 IGBT module, 1 ZnO arrester, in parallel with ZnO arrester after 2 described IGBT module differential concatenations.
Described IGBT module is formed in parallel by IGBT and diode reverse.
Described afterflow pressure limiting branch road comprises diode D1, diode D2, diode D3, diode D4, GTO, resistance, the negative pole of described diode D1 is connected with the positive pole of diode D2, the negative pole of described diode D2 is connected with the negative pole of diode D3, the positive pole of described diode D3 is connected with the negative pole of diode D4, the positive pole of described diode D4 is connected with the positive pole of diode D1, the anode of described GTO is connected between the negative pole of diode D2 and the negative pole of diode D3, the negative electrode of described GTO is connected between the positive pole of diode D4 and the positive pole of diode D1 by resistance, the output in described leading logical loop is connected between the negative pole of diode D1 and the positive pole of diode D2, the positive pole of described diode D3 and the negative pole of diode D4 indirectly.
Compared with prior art, the present invention has the following advantages:
1, compared with conventional solid-state circuit breaker, its Overvoltage suppressing performance significantly improves, and can will cut-off below overvoltage Limiting to 1.3 times of rated voltages under various conditions, and the overvoltage of conventional solid-state circuit breaker is often at about 3 ~ 6 times.
2, compared with conventional solid-state circuit breaker, develop the solid circuit breaker of identical electric pressure, selected IGBT element rated voltage can significantly reduce.
3, compared with traditional mechanical type circuit breaker, its quick action 100 is doubly to about 1000 times, and from Millisecond to delicate level, responsiveness significantly improves, and controllability strengthens;
4, can reduce solid circuit breaker is the auxiliary unit preventing over-voltage breakdown from setting up, and reduces the cost of solid circuit breaker.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the control schematic diagram under normal operating conditions of the present invention;
Fig. 3 is the control schematic diagram of afterflow pressure limiting branch road of the present invention when opening;
Fig. 4 is afterflow of the present invention power consumption process control schematic diagram;
Fig. 5 is the over-voltage waveform figure dammed at current peak place without the circuit breaker of afterflow pressure limiting branch road;
Fig. 6 is the over-voltage waveform figure that the solid circuit breaker of band afterflow pressure limiting branch road dams at current peak place.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As shown in Figure 1, a kind of solid circuit breaker with Overvoltage suppressing function, comprise leading logical loop 1, afterflow pressure limiting branch road 2, the output in described leading logical loop 1 is connected with one end of afterflow pressure limiting branch road 2, the other end ground connection of described afterflow pressure limiting branch road 2, leading logical loop 1 turns off front first conducting afterflow pressure limiting branch road 2, turns off leading logical loop 1 after postponing setting-up time again.
Described leading logical loop 1 is formed by multiple onunit connection in series-parallel, and the quantity of described onunit determines according to the capacity of the rated voltage of environment for use and fault current.Described onunit comprises 2 IGBT module, 1 ZnO arrester, in parallel with ZnO arrester after 2 described IGBT module differential concatenations.Described IGBT module is formed by IGBT and diode D5 reverse parallel connection.
Described afterflow pressure limiting branch road 2 comprises diode D1, diode D2, diode D3, diode D4, GTO, resistance R, the negative pole of described diode D1 is connected with the positive pole of diode D2, the negative pole of described diode D2 is connected with the negative pole of diode D3, the positive pole of described diode D3 is connected with the negative pole of diode D4, the positive pole of described diode D4 is connected with the positive pole of diode D1, the anode of described GTO is connected between the negative pole of diode D2 and the negative pole of diode D3, the negative electrode of described GTO is connected between the positive pole of diode D4 and the positive pole of diode D1 by resistance R, the output in described leading logical loop 1 is connected between the negative pole of diode D1 and the positive pole of diode D2, the positive pole of described diode D3 and the negative pole of diode D4 indirectly.
Wherein afterflow pressure limiting branch road 2 is open-minded before leading logical loop 1 turns off, consume electromagnetic energy stored in circuit inductance by the resistance of afterflow pressure limiting branch road 2, thus reduction solid circuit breaker dominates the temporary overvoltage amplitude that logical loop 1 produces in interrupting process.
Control procedure is as follows: while solid circuit breaker dominates the disconnection of logical loop 1, make afterflow pressure limiting branch road 2 conducting of solid circuit breaker.Because responsiveness is too fast and the factor such as the sluggishness of signal, be in fact difficult to accomplish the leading logical shutoff in loop 1 and the conducting Complete Synchronization of afterflow pressure limiting branch road 2.For this reason, in practical operation, when solid circuit breaker turns off, first conducting afterflow pressure limiting branch road 2, postpone the leading logical loop 1 that a few microsecond turns off solid circuit breaker again, the whole turn off process of circuit breaker will resolve into two stages.
The turn-off time in leading logical loop 1 of solid circuit breaker and the ON time of afterflow pressure limiting branch road 2 control to be realized by the triggering signal order of occurrence controlling turn-off thyristor GTO and IGBT.As shown in Figure 3, before leading logical loop 1 electric current is turned off, the thyristor GTO of afterflow pressure limiting branch road 2 first opens, after the short time delay of 1 microseconds, in solid circuit breaker, the IGBT drive circuit in leading logical loop 1 obtains actuating signal, and each onunit series-parallel ends simultaneously.Because IGBT has certain instantaneous overcurrent rejection ability, solid circuit breaker can work at this phase security.
Whole turn off process detailed process divides (a) normally work, (b) bypass is opened, three processes are consumed energy in (c) afterflow, as shown in Figure 2,3, 4.During normal work, afterflow pressure limiting branch road 2 is in off state, and system is not by the impact of pressure limiting branch road; When solid circuit breaker receive actuating signal start to turn off time, afterflow pressure limiting branch road 2 is connected, and leading logical loop 1 turns off, and afterflow pressure limiting branch road 2 reduces the current changing rate di/dt being turned off circuit, thus plays the effect of over-voltage.At MATLAB/simulink environment, to the interrupting process of 10kV circuit, carry out simulation analysis.Fig. 5 is the temporary overvoltage waveform without producing when turning off peak current under afterflow pressure limiting branch case, probably creates the overvoltage of 3.52p.u.; The temporary overvoltage waveform that Fig. 6 produces when being and turning off peak current under band afterflow pressure limiting branch case, probably only produces the overvoltage of 1.32p.u..
Claims (2)
1. one kind has the solid circuit breaker of Overvoltage suppressing function, it is characterized in that, comprise leading logical loop, afterflow pressure limiting branch road, the output in described leading logical loop is connected with one end of afterflow pressure limiting branch road, the other end ground connection of described afterflow pressure limiting branch road, first conducting afterflow pressure limiting branch road before leading logical loop turns off, turns off leading logical loop again after postponing setting-up time;
Described leading logical loop is formed by multiple onunit connection in series-parallel, and described onunit quantity determines according to the capacity of the rated voltage of environment for use and fault current;
Described onunit comprises 2 IGBT module, 1 ZnO arrester, in parallel with ZnO arrester after 2 described IGBT module differential concatenations;
Described afterflow pressure limiting branch road comprises diode D1, diode D2, diode D3, diode D4, GTO, resistance, the negative pole of described diode D1 is connected with the positive pole of diode D2, the negative pole of described diode D2 is connected with the negative pole of diode D3, the positive pole of described diode D3 is connected with the negative pole of diode D4, the positive pole of described diode D4 is connected with the positive pole of diode D1, the anode of described GTO is connected between the negative pole of diode D2 and the negative pole of diode D3, the negative electrode of described GTO is connected between the positive pole of diode D4 and the positive pole of diode D1 by resistance, the output in described leading logical loop is connected between the negative pole of diode D1 and the positive pole of diode D2, the positive pole of described diode D3 and the negative pole of diode D4 indirectly,
The whole turn off process of circuit breaker will resolve into two stages, before leading logical loop current is turned off, the thyristor GTO of afterflow pressure limiting branch road first opens, after the short time delay of 1 microseconds, in solid circuit breaker, the IGBT drive circuit in leading logical loop obtains actuating signal, and each onunit series-parallel ends simultaneously;
Whole turn off process detailed process divides (a) normally work, (b) bypass is opened, three processes are consumed energy in (c) afterflow; During normal work, afterflow pressure limiting branch road is in off state, and system is not by the impact of pressure limiting branch road; When solid circuit breaker receive actuating signal start to turn off time, afterflow pressure limiting branch road is connected, and leading logical loop turns off, and afterflow pressure limiting branch road reduces the current changing rate di/dt being turned off circuit, thus plays the effect of over-voltage.
2. a kind of solid circuit breaker with Overvoltage suppressing function according to claim 1, it is characterized in that, described IGBT module is formed in parallel by IGBT and diode reverse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110008352.8A CN102593809B (en) | 2011-01-14 | 2011-01-14 | Solid-state circuit breaker with over-voltage suppressing function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110008352.8A CN102593809B (en) | 2011-01-14 | 2011-01-14 | Solid-state circuit breaker with over-voltage suppressing function |
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| Publication Number | Publication Date |
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| CN102593809A CN102593809A (en) | 2012-07-18 |
| CN102593809B true CN102593809B (en) | 2015-06-03 |
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| CN201110008352.8A Expired - Fee Related CN102593809B (en) | 2011-01-14 | 2011-01-14 | Solid-state circuit breaker with over-voltage suppressing function |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203119316U (en) * | 2013-02-08 | 2013-08-07 | 国家电网公司 | Power electronic substation |
| CN103647537A (en) * | 2013-09-10 | 2014-03-19 | 许继电气股份有限公司 | Energy taking and transmitting device and high-voltage electronic direct-current circuit breaker |
| CN103532169A (en) * | 2013-10-25 | 2014-01-22 | 东南大学 | Microgrid intelligent and rapid paralleling splitting device |
| US10230260B2 (en) | 2015-09-23 | 2019-03-12 | Abb Schweiz Ag | Fast utility disconnect switch for single conversion UPS |
| CN105529677A (en) * | 2015-12-01 | 2016-04-27 | 中国矿业大学(北京) | Current-limiting solid-state circuit breaker for actively suppressing overvoltage and control method thereof |
| CN107171292B (en) * | 2017-07-12 | 2019-06-07 | 重庆大学 | A kind of device inhibiting shutdown overvoltage based on SiC MOSFET DC solid circuit breaker |
| KR102185036B1 (en) | 2018-04-30 | 2020-12-01 | 엘에스일렉트릭(주) | Circuit breaker control module |
| CN110350491A (en) * | 2019-06-14 | 2019-10-18 | 华北电力大学 | Decompression clamping type direct-current breaker topology suitable for DC grid |
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| EP0867998A1 (en) * | 1997-03-24 | 1998-09-30 | Asea Brown Boveri Ab | A plant for transmitting electric power |
| CN1367512A (en) * | 2002-02-10 | 2002-09-04 | 朱仲彦 | Magnetic breaking technique of excitation system of large power generator set |
| CN2720613Y (en) * | 2004-08-03 | 2005-08-24 | 东南大学 | Inversion device of mixed soft-cut current-limited breaker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5164872A (en) * | 1991-06-17 | 1992-11-17 | General Electric Company | Load circuit commutation circuit |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0867998A1 (en) * | 1997-03-24 | 1998-09-30 | Asea Brown Boveri Ab | A plant for transmitting electric power |
| CN1367512A (en) * | 2002-02-10 | 2002-09-04 | 朱仲彦 | Magnetic breaking technique of excitation system of large power generator set |
| CN2720613Y (en) * | 2004-08-03 | 2005-08-24 | 东南大学 | Inversion device of mixed soft-cut current-limited breaker |
Non-Patent Citations (2)
| Title |
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| 基于IGBT软关断的混合式限流断路器结构与分析;梅军等;《电力系统自动化》;20040925;全文 * |
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| CN102593809A (en) | 2012-07-18 |
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