CN102593809A - 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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- CN102593809A CN102593809A CN2011100083528A CN201110008352A CN102593809A CN 102593809 A CN102593809 A CN 102593809A CN 2011100083528 A CN2011100083528 A CN 2011100083528A CN 201110008352 A CN201110008352 A CN 201110008352A CN 102593809 A CN102593809 A CN 102593809A
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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 inhibit feature.
Background technology
Because micro power network inserts with the generating equipment of managing; Energy output is unstable relatively; In order to keep little electrical network user oriented that stable voltage can be provided; Except setting up a series of energy storage device, control also need be regulated to generation of electricity by new energy neatly in micro power network inside, needs installing responsiveness switchgear rapidly; And since slow based on switch (as: oil circuit breaker, SF6 circuit breaker, the vacuum circuit-breaker) responsiveness of mechanical action, be difficult to the intelligent control flexibly of the system that realizes.In order to safeguard the stable operation of micro power network, circuit breaker is had higher requirement, hope 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 based on the novel no fracture switchgear of power electronic device; Thereby possessed far faster than traditional mechanical formula circuit breaker responsiveness; Its operate time is in the microsecond level; Can realize exactly that circuit breaks off or closure in the designated phase of voltage or electric current, can satisfy the strict demand of little electrical network switching devices.Cooperate fault current limiter to use, solid circuit breaker can just not cut off faulty line when short circuit current also significantly raises, and has improved the stability of electrical network greatly.Because solid circuit breaker does not have fracture, on the one hand, in switching process, can not produce electric arc, has improved the useful life of circuit breaker, also can cause producing in the interrupting process too high cut-off overvoltage but then.Overvoltage is the main cause that switch element damages, and also is 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 the afterflow branch road in solid circuit breaker, for fault current provides exergonic passage, significantly suppress fault current and cut-off caused overvoltage, for the development of the solid circuit breaker of voltage levels provides new method.
Summary of the invention
The object of the invention is exactly for the defective that overcomes above-mentioned prior art existence a kind of solid circuit breaker with overvoltage inhibit feature to be provided.
The object of the invention can be realized through following technical scheme:
A kind of solid circuit breaker with overvoltage inhibit feature; It is characterized in that; Comprise leading logical loop, afterflow pressure limiting branch road, the output in described leading logical loop is connected the other end ground connection of described afterflow pressure limiting branch road with an end of afterflow pressure limiting branch road; First conducting afterflow pressure limiting branch road before turn-off in leading logical loop postpones to turn-off leading logical loop again behind the setting-up time.
Described leading logical loop is formed by a plurality of onunit connection in series-parallel, and the quantity of described onunit is according to the rated voltage of environment for use and the capacity decision of fault current.
Described onunit comprises 2 IGBT modules, 1 ZnO arrester, and is parallelly connected with ZnO arrester after described 2 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, and the anode of described GTO is connected between the negative pole of negative pole and diode D3 of diode D2, and the negative electrode of described GTO is connected on through resistance between the positive pole of positive pole and diode D1 of diode D4; The output in described leading logical loop is connected between the positive pole of negative pole and diode D2 of diode D1, ground connection between the negative pole of the positive pole of described diode D3 and diode D4.
Compared with prior art, the present invention has the following advantages:
1, compare with the conventional solid-state circuit breaker, its overvoltage rejection significantly improves, can be under various conditions with cut-offfing overvoltage Limiting to 1.3 times below the rated voltage, and the overvoltage of conventional solid-state circuit breaker is often about 3～6 times.
2, compare with the conventional solid-state circuit breaker, develop the solid circuit breaker of identical electric pressure, the IGBT element rated voltage of being selected for use can significantly reduce.
3, compare with traditional mechanical formula circuit breaker, about 100 times to 1000 times of its quick actions, to delicate level, responsiveness significantly improves from Millisecond, and controllability strengthens;
4, can reduce solid circuit breaker is the auxiliary unit that prevents that over-voltage breakdown from setting up, and reduces the cost of solid circuit breaker.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the control sketch map under the normal operating conditions of the present invention;
Control sketch map when Fig. 3 opens for afterflow pressure limiting branch road of the present invention;
Fig. 4 is an afterflow power consumption process control sketch map of the present invention;
Fig. 5 is the over-voltage waveform figure that the circuit breaker of no afterflow pressure limiting branch road dams at the current peak place;
The over-voltage waveform figure that Fig. 6 dams at the current peak place for the solid circuit breaker of being with afterflow pressure limiting branch road.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
Embodiment
As shown in Figure 1; A kind of solid circuit breaker with overvoltage inhibit feature; Comprise leading logical loop 1, afterflow pressure limiting branch road 2, the output in described leading logical loop 1 is connected the other end ground connection of described afterflow pressure limiting branch road 2 with an end of afterflow pressure limiting branch road 2; First conducting afterflow pressure limiting branch road 2 before turn-off in leading logical loop 1 postpones to turn-off leading logical loop 1 again behind the setting-up time.
Described leading logical loop 1 is formed by a plurality of onunit connection in series-parallel, and the quantity of described onunit is according to the rated voltage of environment for use and the capacity decision of fault current.Described onunit comprises 2 IGBT modules, 1 ZnO arrester, and is parallelly connected with ZnO arrester after described 2 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, and the anode of described GTO is connected between the negative pole of negative pole and diode D3 of diode D2, and the negative electrode of described GTO is connected on through resistance R between the positive pole of positive pole and diode D1 of diode D4; The output in described leading logical loop 1 is connected between the positive pole of negative pole and diode D2 of diode D1, ground connection between the negative pole of the positive pole of described diode D3 and diode D4.
Wherein afterflow pressure limiting branch road 2 is open-minded before turn-off in leading logical loop 1; Resistance through afterflow pressure limiting branch road 2 consumes electromagnetic energy stored in the circuit inductance, thereby reduces the temporary overvoltage amplitude that the leading logical loop 1 of solid circuit breaker produces in interrupting process.
Control procedure is following: when the leading logical loop 1 of solid circuit breaker is broken off, make afterflow pressure limiting branch road 2 conductings of solid circuit breaker.Because the factors such as sluggishness of the too fast and signal of responsiveness, be difficult in fact to accomplish that the conducting of shutoff and afterflow pressure limiting branch road 2 in leading logical loop 1 is synchronous fully.For this reason, in the practical operation, when solid circuit breaker turn-offed, first conducting afterflow pressure limiting branch road 2 postponed the leading logical loop 1 that several microseconds are turn-offed solid circuit breaker again, and the whole turn off process of circuit breaker will resolve into two stages.
The ON time control of the turn-off time in the leading logical loop 1 of solid circuit breaker and afterflow pressure limiting branch road 2 can realize through the triggering signal order of occurrence of control turn-off thyristor GTO and IGBT.Shown in accompanying drawing 3; Before leading logical loop 1 electric current was turned off, the thyristor GTO of afterflow pressure limiting branch road 2 opened earlier, behind the short time delay about 1 microsecond; The IGBT drive circuit in leading logical loop 1 obtains actuating signal in the solid circuit breaker, and series-parallel each onunit ends simultaneously.Suppress ability because IGBT has certain instantaneous overcurrent, solid circuit breaker can be at this stage trouble free service.
Whole turn off process detailed process branch (a) operate as normal, (b) bypass are opened, three processes of (c) afterflow power consumption, like Fig. 2,3, shown in 4.During operate as normal, afterflow pressure limiting branch road 2 is in off state, and system does not receive the influence of pressure limiting branch road; When solid circuit breaker was received actuating signal and begun to turn-off, afterflow pressure limiting branch road 2 was connected, and turn-off in leading logical loop 1, and afterflow pressure limiting branch road 2 has reduced the current changing rate di/dt that is turned off circuit, thereby plays the effect of over-voltage.At the MATLAB/simulink environment,, carried out simulation analysis to the interrupting process of 10kV circuit.Fig. 5 is the temporary overvoltage waveform that produces when turn-offing peak current under the no afterflow pressure limiting branch road situation, has probably produced the overvoltage of 3.52p.u.; The temporary overvoltage waveform that Fig. 6 produces when turn-offing peak current for being with under the afterflow pressure limiting branch road situation, the general overvoltage that has only produced 1.32p.u..
Claims (5)
1. solid circuit breaker with overvoltage inhibit feature; It is characterized in that; Comprise leading logical loop, afterflow pressure limiting branch road, the output in described leading logical loop is connected the other end ground connection of described afterflow pressure limiting branch road with an end of afterflow pressure limiting branch road; First conducting afterflow pressure limiting branch road before turn-off in leading logical loop postpones to turn-off leading logical loop again behind the setting-up time.
2. a kind of solid circuit breaker according to claim 1 with overvoltage inhibit feature; It is characterized in that; Described leading logical loop is formed by a plurality of onunit connection in series-parallel, and described onunit quantity is according to the rated voltage of environment for use and the capacity decision of fault current.
3. a kind of solid circuit breaker with overvoltage inhibit feature according to claim 2 is characterized in that, described onunit comprises 2 IGBT modules, 1 ZnO arrester, and is parallelly connected with ZnO arrester after described 2 IGBT module differential concatenations.
4. a kind of solid circuit breaker with overvoltage inhibit feature according to claim 3 is characterized in that described IGBT module is formed in parallel by IGBT and diode reverse.
5. a kind of solid circuit breaker according to claim 1 with overvoltage inhibit feature; It is characterized in that; 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, and the positive pole of described diode D3 is connected with the negative pole of diode D4, and 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 negative pole and diode D3 of diode D2; The negative electrode of described GTO is connected on through resistance between the positive pole of positive pole and diode D1 of diode D4, and the output in described leading logical loop is connected between the positive pole of negative pole and diode D2 of diode D1, ground connection between the negative pole of the positive pole of described diode D3 and diode D4.
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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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| CN201110008352.8A CN102593809B (en) | 2011-01-14 | 2011-01-14 | Solid-state circuit breaker with over-voltage suppressing function |
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| CN102593809A true CN102593809A (en) | 2012-07-18 |
| CN102593809B 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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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138171A (en) * | 2013-02-08 | 2013-06-05 | 国家电网公司 | Power electronic transformer substation |
| CN103532169A (en) * | 2013-10-25 | 2014-01-22 | 东南大学 | Microgrid intelligent and rapid paralleling splitting device |
| 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 |
| 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 |
| CN107171292A (en) * | 2017-07-12 | 2017-09-15 | 重庆大学 | A kind of device for suppressing shut-off overvoltage based on SiC MOSFET DC solid circuit breakers |
| US10230260B2 (en) | 2015-09-23 | 2019-03-12 | Abb Schweiz Ag | Fast utility disconnect switch for single conversion UPS |
| 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 |
| CN111869029A (en) * | 2018-04-30 | 2020-10-30 | Ls电气株式会社 | Circuit breaker control module |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138171A (en) * | 2013-02-08 | 2013-06-05 | 国家电网公司 | Power electronic transformer 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 |
| CN107171292A (en) * | 2017-07-12 | 2017-09-15 | 重庆大学 | A kind of device for suppressing shut-off overvoltage based on SiC MOSFET DC solid circuit breakers |
| 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 |
| CN111869029A (en) * | 2018-04-30 | 2020-10-30 | Ls电气株式会社 | Circuit breaker control module |
| CN111869029B (en) * | 2018-04-30 | 2022-09-09 | Ls电气株式会社 | Circuit breaker control module |
| US11811218B2 (en) | 2018-04-30 | 2023-11-07 | Ls Electric Co., Ltd. | 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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| Publication number | Publication date |
|---|---|
| CN102593809B (en) | 2015-06-03 |
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