CN107171303A - A kind of short circuit current flow blocks circuit - Google Patents
A kind of short circuit current flow blocks circuit Download PDFInfo
- Publication number
- CN107171303A CN107171303A CN201710384387.9A CN201710384387A CN107171303A CN 107171303 A CN107171303 A CN 107171303A CN 201710384387 A CN201710384387 A CN 201710384387A CN 107171303 A CN107171303 A CN 107171303A
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- igct
- circuit
- diode
- current flow
- inductance
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- 239000000126 substance Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/028—Current limitation by detuning a series resonant circuit
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention belongs to electric and electronic technical field, and in particular to a kind of short circuit current flow blocks circuit.The circuit includes inductance L1, electric capacity C1, two diodes D1, a D2, and six IGCTs T1, T2, T3, T4, T5, T6.Circuit connected in series of the present invention is operated in power network, when short trouble does not occur, this circuit is in resonant operational state, and pressure drop is not produced substantially；After occurring short trouble, by controlling the conducting and judgement of respective thyristor, short circuit current flow can be quickly blocked.Compared with conventional power electronics type fault current limiter, fast response time of the present invention, can not only limiting short-circuit current, short circuit current flow can be more blocked completely, breaker is can be used as and uses.
Description
Technical field
The invention belongs to electric and electronic technical field, and in particular to a kind of short circuit current flow blocks circuit.
Background technology
When power network occur short trouble after, for the further expansion of fault restriction scope, it is ensured that system it is safe and reliable
Operation is, it is necessary to take measures fast and effectively to limit or block short circuit current flow.
Conventional method is that short circuit current flow is blocked using devices such as fuse or breakers, but fuse belongs to disposable production
Replacing in time is needed after product, fusing, and breaker actuation needs certain time, it is impossible to meet the requirement of some sensitive loads.Closely
Nian Lai, with continuing to develop for power electronic devices, new material and control chip, various New Fault Current Limiters occur in succession,
Including power electronics type (also known as solid-state version), superconductor type, explosion type etc..But existing fault current limiter is only capable of limiting short
Road electric current, need to coordinate breaker to use, and can not fully meet the demand of quick blocking short circuit current flow during to electric network fault.
The content of the invention
In order to overcome the shortcomings of that above-mentioned prior art is present, quickly blocked during it is an object of the invention to for electric network fault
The demand of short circuit current flow, so that propose that a kind of short circuit current flow blocks circuit, compared with conventional power electronics type fault current limiter, this
Invention fast response time, can not only limiting short-circuit current, short circuit current flow can be more blocked completely, breaker is can be used as and uses.
In order to achieve the above object, the technical solution adopted in the present invention is：A kind of short circuit current flow blocks circuit, including one
Individual inductance L1, electric capacity C1, two diodes D1, a D2, and six IGCTs T1, T2, T3, T4, T5, T6, it is characterised in that：
(1) inductance L1 and electric capacity C1 is connected in series；
(2) IGCT T1 and diode D1 is connected in parallel, and IGCT T1 positive level connection diode D1 negative electrode, brilliant lock
Pipe T1 negative electrode connection diode D1 anode；
(3) IGCT T2 and diode D2 is connected in parallel；And IGCT T2 positive level connection diode D2 negative electrode, brilliant lock
Pipe T2 negative electrode connection diode D2 anode；
(4) IGCT T4 is in parallel with IGCT T5 is connected in parallel with inductance L1, and IGCT T4 anode, IGCT T5
Negative electrode is connected with an inductance L1 terminal, another terminal of IGCT T4 negative electrode, IGCT T5 anode and inductance L1
Connection；
(5) diode D1 anode is connected with IGCT T4 anode；
(6) electric capacity C1 is connected with diode D2；
(7) IGCT T3 anodes are connected with diode D2 negative electrodes, and IGCT T3 negative electrodes are connected with diode D1 negative electrodes；
(8) IGCT T6 anodes are connected with diode D2 anodes, and IGCT T6 negative electrodes are connected with diode D1 anodes.
Further, the circuit has two ports P1 and P2.
Further, inductance L1 and electric capacity C1 are operated in tandem working state, and its parameter value is met：
Wherein, ω is the frequency of electric current between P1, P2.
Further, when circuit connected in series is in AC power cord, when not starting block function, IGCT T1, T2 control
Pole signal is high level, and IGCT T3, T4, T5, T6 control pole signal is low level, and now electric current is along P1-D1-L1-C1-
D2-P2 or P2-T2-C1-L1-P1 path circulation, due to L1, C1 work and series resonance state, blocks circuit substantially not
Produce pressure drop.
Further, when circuit connected in series is in AC power cord, start after block function, IGCT T1, T2 control pole
Signal is low level, and IGCT T3, T4, T5, T6 control pole signal is high level, and now inductance L1 is short-circuited, if there is P1 streams
To P2 electric current, then current flow paths are P1-D1-T4-C1-D2-P2, if there is the electric current that P2 flows to P1, current flowing
Path is P2-T3-T4-C1-T6-P1；No matter the sense of current i.e. between P1, P2, filled by T4 to electric capacity C1 one directions
Electricity, finally make it that electric capacity C1 voltages are sufficiently high, block electric current between P1, P2.
Compared with prior art, the present invention has advantages below：(1) circuit connected in series of the present invention is in AC power cord, when
When not occurring short trouble, circuit of the present invention works in normal mode, and wherein inductance capacitance is in resonant condition, do not produced substantially
Pressure drop, primary circuit performance is not influenceed；(2) after occurring short trouble, circuit of the present invention is by controlling the conducting of respective thyristor
And judgement, rapidly in blocking state, it can quickly block short circuit current flow.(3) circuit of the present invention can be used as breaker and use, and its
Its fault current limiter can only fault current limiting, it is impossible to blocks fault current, breaker need to be coordinated to use.
Brief description of the drawings
Fig. 1 is circuit topological structure schematic diagram of the present invention.
Fig. 2 is equivalent circuit diagram of the circuit of the present invention in not actuated block function.
Fig. 3 is equivalent circuit diagram of the circuit of the present invention after block function is started.
Input and output voltage waveform when Fig. 4 is circuit of the present invention not actuated block function, wherein, (a) is input voltage ripple
Shape is voltage waveform at P1；(b) it is voltage waveform at P2 for output voltage waveforms.
Fig. 5 is to use circuit of the present invention, occurs short trouble in power network, starts input-output wave shape after block function, its
In, (a) is input voltage waveform；(b) it is output voltage waveforms, (c) is input side current waveform.
Embodiment
For the ease of those of ordinary skill in the art understand and implement the present invention, with reference to embodiment the present invention is made into
The detailed description of one step, it will be appreciated that implementation example described herein is merely to illustrate and explain the present invention, is not used to limit
The fixed present invention.
As Fig. 1 blocks the topological structure schematic diagram of circuit for a kind of short circuit current flow of the invention, it is main include an inductance L1,
One electric capacity C1, two diodes (D1, D2) and six IGCTs (T1, T2, T3, T4, T5, T6), the annexation of each element
As shown in Figure 1.Wherein：
(1) inductance L1 and electric capacity C1 is connected in series；
(2) IGCT T1 and diode D1 is connected in parallel, and IGCT T1 positive level connection diode D1 negative electrode, brilliant lock
Pipe T1 negative electrode connection diode D1 anode；
(3) IGCT T2 and diode D2 is connected in parallel；And IGCT T2 positive level connection diode D2 negative electrode, brilliant lock
Pipe T2 negative electrode connection diode D2 anode；
(4) IGCT T4 is in parallel with IGCT T5 is connected in parallel with inductance L1, and IGCT T4 anode, IGCT T5
Negative electrode is connected with an inductance L1 terminal, another terminal of IGCT T4 negative electrode, IGCT T5 anode and inductance L1
Connection；
(5) diode D1 anode is connected with IGCT T4 anode；
(6) electric capacity C1 is connected with diode D2；
(7) IGCT T3 anodes are connected with diode D2 negative electrodes, and IGCT T3 negative electrodes are connected with diode D1 negative electrodes；
(8) IGCT T6 anodes are connected with diode D2 anodes, and IGCT T6 negative electrodes are connected with diode D1 anodes.
Described short circuit current flow blocks circuit, with two ports P1 and P2.
Inductance L1 and electric capacity C1 are operated in tandem working state, and its parameter value is met：
Wherein ω is the frequency of electric current between P1, P2.
When circuit connected in series of the present invention is in AC power cord, when not starting block function, IGCT T1, T2 control pole are believed
Number be high level, IGCT T3, T4, T5, T6 control pole signal be low level.Now electric current is along P1-D1-L1-C1-D2-P2
Or P2-T2-C1-L1-P1 path circulation, due to L1, C1 work and series resonance state, block circuit not produce pressure substantially
Drop.
When circuit connected in series of the present invention is in AC power cord, start after block function, IGCT T1, T2 control pole signal
For low level, IGCT T3, T4, T5, T6 control pole signal is high level.Now inductance L1 is short-circuited, if there is P1 flows to P2
Electric current, then current flow paths be P1-D1-T4-C1-D2-P2, if there is the electric current that P2 flows to P1, current flow paths
For P2-T3-T4-C1-T6-P1；No matter the sense of current i.e. between P1, P2, charged by T4 to electric capacity C1 one directions, most
Cause that electric capacity C1 voltages are sufficiently high, block electric current between P1, P2 eventually.
Fig. 2 blocks equivalent circuit diagram of the circuit in not actuated block function for the short circuit current flow of the present invention.Now in Fig. 1
IGCT T1, T2 control pole signal be high level, IGCT T3, T4, T5, T6 control pole signal be low level, the present invention
Circuit can be equivalent to structure shown in Fig. 2, and wherein inductance L1, electric capacity C1 work in series resonance state.
Fig. 3 blocks equivalent circuit diagram of the circuit after block function is started for a kind of short circuit current flow of the invention.Now brilliant lock
Pipe T1, T2 control pole signal are low level, and IGCT T3, T4, T5, T6 control pole signal is high level, and this circuit can be equivalent
The structure shown in Fig. 3, is a half-controlled rectifier circuit, no matter the sense of current, can be by blocking electricity to electric capacity charging
Stream circulation.
Input and output voltage waveform when Fig. 4 is circuit of the present invention not actuated block function, wherein, (a) is input voltage
Waveform is voltage waveform at P1；(b) it is voltage waveform at P2 for output voltage waveforms.It can be seen that Fig. 4 (b) waveforms and Fig. 4 (a)
Waveform it is basically identical；I.e. not actuated block function when this circuit on former circuit substantially without influence.
Fig. 5 uses circuit of the present invention, occurs short trouble in power network, starts input-output wave shape after block function, wherein,
(a) it is input voltage waveform；(b) it is output voltage waveforms, (c) is input side current waveform.Circuit breaks down at 0.1s,
From Fig. 5 (a) it can be seen that rapid after input voltage brief fluctuations recover normal, that is, have substantially no effect on to other line powerings, from
Fig. 5 (b) is it can be seen that output voltage is quickly decreased to 0 after short trouble generation；From Fig. 5 (c) it can be seen that input side electric current
Because occurring after short circuit increase, being quickly decreased to 0, i.e. this circuit has blocked rapidly short circuit current flow again.
The result of invention：A kind of short circuit current flow is given in the present invention and blocks circuit, and it is soft using the power supply emulation of specialty
Part Saber has carried out simulating, verifying to the circuit.From simulation result it can be seen that, the program can rapidly hinder in line fault
Disconnected short circuit current flow, at the same voltage when not influenceing circuit normal work, compared to protection device, circuit response speed of the present invention
It hurry up, control method is flexible, with preferable application prospect.
It should be appreciated that the part that this specification is not elaborated belongs to prior art.
It should be appreciated that the above-mentioned description for preferred embodiment is more detailed, therefore it can not be considered to this
The limitation of invention patent protection scope, one of ordinary skill in the art is not departing from power of the present invention under the enlightenment of the present invention
Profit is required under protected ambit, can also be made replacement or be deformed, each fall within protection scope of the present invention, this hair
It is bright scope is claimed to be determined by the appended claims.
Claims (5)
1. a kind of short circuit current flow blocks circuit, including inductance L1, electric capacity C1, two diodes D1, a D2, and six crystalline substances
Brake tube T1, T2, T3, T4, T5, T6, it is characterised in that：
(1) inductance L1 and electric capacity C1 is connected in series；
(2) IGCT T1 and diode D1 is connected in parallel, and IGCT T1 positive level connection diode D1 negative electrode, IGCT T1
Negative electrode connection diode D1 anode；
(3) IGCT T2 and diode D2 is connected in parallel；And IGCT T2 positive level connection diode D2 negative electrode, IGCT T2
Negative electrode connection diode D2 anode；
(4) IGCT T4 is in parallel with IGCT T5 is connected in parallel with inductance L1, and IGCT T4 anode, IGCT T5 negative electrode
It is connected with an inductance L1 terminal, IGCT T4 negative electrode, IGCT T5 anode are connected with inductance L1 another terminal；
(5) diode D1 anode is connected with IGCT T4 anode；
(6) electric capacity C1 is connected with diode D2；
(7) IGCT T3 anodes are connected with diode D2 negative electrodes, and IGCT T3 negative electrodes are connected with diode D1 negative electrodes；
(8) IGCT T6 anodes are connected with diode D2 anodes, and IGCT T6 negative electrodes are connected with diode D1 anodes.
2. a kind of short circuit current flow as claimed in claim 1 blocks circuit, it is characterised in that：The circuit has two port P1
And P2.
3. a kind of short circuit current flow as claimed in claim 2 blocks circuit, it is characterised in that：Inductance L1 and electric capacity C1 are operated in string
Join working condition, its parameter value is met：
<mrow>
<mi>&omega;</mi>
<mi>L</mi>
<mn>1</mn>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<mrow>
<mi>&omega;</mi>
<mi>C</mi>
<mn>1</mn>
</mrow>
</mfrac>
</mrow>
Wherein, ω is the frequency of electric current between P1, P2.
4. a kind of short circuit current flow blocks circuit as claimed in claim 2 or claim 3, it is characterised in that：When circuit connected in series is in alternating current
In the line of source, when not starting block function, IGCT T1, T2 control pole signal are high level, IGCT T3, T4, T5, T6 control
Pole signal is low level, now path circulation of the electric current along P1-D1-L1-C1-D2-P2 or P2-T2-C1-L1-P1, due to
L1, C1 work and series resonance state, block circuit not produce pressure drop substantially.
5. a kind of short circuit current flow blocks circuit as claimed in claim 2 or claim 3, it is characterised in that：When circuit connected in series is in alternating current
In the line of source, start after block function, IGCT T1, T2 control pole signal are low level, IGCT T3, T4, T5, T6 control pole
Signal is high level, and now inductance L1 is short-circuited, if there is the electric current that P1 flows to P2, and current flow paths are P1-D1-T4-
C1-D2-P2, if there is the electric current that P2 flows to P1, current flow paths are P2-T3-T4-C1-T6-P1；Though i.e. P1, P2 it
Between the sense of current how, by T4 give electric capacity C1 one directions charge, finally cause electric capacity C1 voltages it is sufficiently high, block P1, P2
Between electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710384387.9A CN107171303B (en) | 2017-05-26 | 2017-05-26 | A kind of short circuit current blocking circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710384387.9A CN107171303B (en) | 2017-05-26 | 2017-05-26 | A kind of short circuit current blocking circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107171303A true CN107171303A (en) | 2017-09-15 |
| CN107171303B CN107171303B (en) | 2019-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710384387.9A Active CN107171303B (en) | 2017-05-26 | 2017-05-26 | A kind of short circuit current blocking circuit |
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| Country | Link |
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| CN (1) | CN107171303B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109962462A (en) * | 2019-01-28 | 2019-07-02 | 湖北工业大学 | A kind of DC grid bidirectional current blocking circuit based on tandem tap |
| CN113078618A (en) * | 2021-03-08 | 2021-07-06 | 珠海润科电力设备有限公司 | PT blocking method and device based on thyristor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202197096U (en) * | 2011-09-14 | 2012-04-18 | 广东电网公司电力科学研究院 | Short-circuit current limiter of electric power system |
| WO2013176410A1 (en) * | 2012-05-22 | 2013-11-28 | (주)그린파워 | Secondary protection circuit of wireless power transmission device |
| CN105375454A (en) * | 2015-11-12 | 2016-03-02 | 国网山东省电力公司电力科学研究院 | Short circuit fault current limiter |
| WO2016138089A1 (en) * | 2015-02-26 | 2016-09-01 | Raytheon Company | Robust solid-state circuit protection apparatus |
-
2017
- 2017-05-26 CN CN201710384387.9A patent/CN107171303B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202197096U (en) * | 2011-09-14 | 2012-04-18 | 广东电网公司电力科学研究院 | Short-circuit current limiter of electric power system |
| WO2013176410A1 (en) * | 2012-05-22 | 2013-11-28 | (주)그린파워 | Secondary protection circuit of wireless power transmission device |
| WO2016138089A1 (en) * | 2015-02-26 | 2016-09-01 | Raytheon Company | Robust solid-state circuit protection apparatus |
| CN105375454A (en) * | 2015-11-12 | 2016-03-02 | 国网山东省电力公司电力科学研究院 | Short circuit fault current limiter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109962462A (en) * | 2019-01-28 | 2019-07-02 | 湖北工业大学 | A kind of DC grid bidirectional current blocking circuit based on tandem tap |
| CN109962462B (en) * | 2019-01-28 | 2021-03-02 | 湖北工业大学 | Direct current electric wire netting two-way current blocking circuit based on series switch |
| CN113078618A (en) * | 2021-03-08 | 2021-07-06 | 珠海润科电力设备有限公司 | PT blocking method and device based on thyristor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107171303B (en) | 2019-04-12 |
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| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Lujun Inventor after: Yang Zhenyu Inventor before: Wang Lujun |
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Application publication date: 20170915 Assignee: Wuhan Lingte Information Technology Co.,Ltd. Assignor: HUBEI University OF TECHNOLOGY Contract record no.: X2023980054677 Denomination of invention: A short-circuit current blocking circuit Granted publication date: 20190412 License type: Common License Record date: 20240103 |