CN107171303B - A kind of short circuit current blocking circuit - Google Patents
A kind of short circuit current blocking circuit Download PDFInfo
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- CN107171303B CN107171303B CN201710384387.9A CN201710384387A CN107171303B CN 107171303 B CN107171303 B CN 107171303B CN 201710384387 A CN201710384387 A CN 201710384387A CN 107171303 B CN107171303 B CN 107171303B
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- thyristor
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- 230000000903 blocking effect Effects 0.000 title abstract description 7
- 239000003990 capacitor Substances 0.000 claims abstract description 21
- 239000000126 substance Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001681 protective effect Effects 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)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention belongs to power electronics fields, and in particular to a kind of short circuit current blocking circuit.The circuit includes an inductance L1, a capacitor C1, two diodes D1, D2 and six thyristors T1, T2, T3, T4, T5, T6.By circuit tandem working of the present invention in power grid, when short trouble does not occur, this circuit is in resonant operational state, does not generate pressure drop substantially；After short trouble occurs, by controlling the conducting and judgement of respective thyristor, short circuit current can be quickly blocked.Compared with previous power electronics type fault current limiter, fast response time of the present invention, can not only limiting short-circuit current, can more block short circuit current completely, can be used as breaker use.
Description
Technical field
The invention belongs to power electronics fields, and in particular to a kind of short circuit current blocking circuit.
Background technique
After short trouble occurs for power grid, for the further expansion of fault restriction range, guarantee the safe and reliable of system
Operation, needs to take measures quickly and effectively to limit or block short circuit current.
Conventional method is short circuit current to be blocked using devices such as fuse or breakers, but fuse belongs to disposable production
Product need to replace in time after fusing, and breaker actuation needs certain time, is not able to satisfy the requirement of certain sensitive loads.Closely
Nian Lai, with power electronic devices, new material and the continuous development for controlling chip, various New Fault Current Limiters occur in succession,
Including power electronics type (also known as solid-state version), superconductor type, explosion type etc..However existing fault current limiter be only capable of limiting it is short
Road electric current need to cooperate breaker to use, and the demand of short circuit current is quickly blocked when can not fully meet to electric network fault.
Summary of the invention
It is quickly blocked when in order to overcome the shortcomings of the prior art described above, it is an object of the invention to be directed to electric network fault
The demand of short circuit current, thus propose that a kind of short circuit current blocks circuit, compared with previous power electronics type fault current limiter, this
Invention fast response time, can not only limiting short-circuit current, can more block short circuit current completely, can be used as breaker use.
In order to achieve the above object, the technical scheme adopted by the invention is that: a kind of short circuit current blocks circuit, including one
A inductance L1, a capacitor C1, two diodes D1, D2 and six thyristors T1, T2, T3, T4, T5, T6, it is characterised in that:
(1) inductance L1 and capacitor C1 is connected in series；
(2) thyristor T1 and diode D1 is connected in parallel, and the cathode of the positive grade connection diode D1 of thyristor T1, brilliant lock
The anode of the cathode connection diode D1 of pipe T1；
(3) thyristor T2 and diode D2 is connected in parallel；And the cathode of the positive grade connection diode D2 of thyristor T2, brilliant lock
The anode of the cathode connection diode D2 of pipe T2；
(4) thyristor T4 is in parallel with thyristor T5 is connected in parallel with inductance L1, and the anode of thyristor T4, thyristor T5
Cathode is connect with a terminal of inductance L1, another terminal of the cathode of thyristor T4, the anode of thyristor T5 and inductance L1
Connection；
(5) anode of diode D1 is connect with the anode of thyristor T4；
(6) capacitor C1 is connect with diode D2；
(7) thyristor T3 anode is connect with diode D2 cathode, and thyristor T3 cathode is connect with diode D1 cathode；
(8) thyristor T6 anode is connect with diode D2 anode, and thyristor T6 cathode is connect with diode D1 anode.
Further, there are two port P1 and P2 for the circuit tool.
Further, inductance L1 and capacitor C1 work meets in tandem working state, parameter value:
Wherein, between ω P1, P2 electric current frequency.
Further, when circuit is connected in AC power cord, does not start block function, the control of thyristor T1, T2
Pole signal is high level, and thyristor T3, T4, T5, T6 control electrode signal is low level, and electric current is along P1-D1-L1-C1- at this time
The path of D2-P2 or P2-T2-C1-L1-P1 is circulated, and due to L1, C1 work and series resonance state, blocks circuit substantially not
Generate pressure drop.
Further, when circuit is connected in AC power cord, after starting block function, the control electrode of thyristor T1, T2
Signal is low level, and thyristor T3, T4, T5, T6 control electrode signal is high level, and inductance L1 is short-circuited at this time, and P1 flows if it exists
To the electric current of P2, then current flow paths are P1-D1-T4-C1-D2-P2, and P2 flows to the electric current of P1 if it exists, then current flowing
Path is P2-T3-T4-C1-T6-P1；No matter current direction i.e. between P1, P2, filled by T4 to capacitor C1 one direction
Electricity finally makes capacitor C1 voltage sufficiently high, blocks electric current between P1, P2.
Compared with prior art, the invention has the following advantages that (1) circuit of the present invention is connected in AC power cord, when
When short trouble not occurring, circuit of the present invention works in normal mode, and wherein inductance capacitance is in resonant state, does not generate substantially
Pressure drop does not influence primary circuit performance；(2) after short trouble occurs, circuit of the present invention passes through the conducting of control respective thyristor
And judgement, it is in blocking state rapidly, can quickly block short circuit current.(3) circuit of the present invention can be used as breaker use, and its
Its fault current limiter can only fault current limiting, fault current cannot be blocked, breaker need to be cooperated to use.
Detailed description of the invention
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 inactive block function.
Fig. 3 is equivalent circuit diagram of the circuit of the present invention after starting block function.
Input and output voltage waveform when Fig. 4 is circuit of the present invention inactive block function, wherein (a) is input voltage wave
Voltage waveform at shape, that is, P1；It (b) is voltage waveform at output voltage waveforms, that is, P2.
Fig. 5 is to use circuit of the present invention, and short trouble occurs in power grid, starts input-output wave shape after block function,
In, (a) is input voltage waveform；(b) it is output voltage waveforms, (c) is input side current waveform.
Specific embodiment
For the ease of those of ordinary skill in the art understand and implement the present invention, below with reference to embodiment to the present invention make into
The detailed description of one step, it should be understood that implementation example described herein is merely to illustrate and explain the present invention, and is not used to limit
The fixed present invention.
If Fig. 1 is the topological structure schematic diagram that a kind of short circuit current of the present invention blocks circuit, mainly include an inductance L1,
One capacitor C1, two diodes (D1, D2) and six thyristors (T1, T2, T3, T4, T5, T6), the connection relationship of each element
As shown in Figure 1.Wherein:
(1) inductance L1 and capacitor C1 is connected in series；
(2) thyristor T1 and diode D1 is connected in parallel, and the cathode of the positive grade connection diode D1 of thyristor T1, brilliant lock
The anode of the cathode connection diode D1 of pipe T1；
(3) thyristor T2 and diode D2 is connected in parallel；And the cathode of the positive grade connection diode D2 of thyristor T2, brilliant lock
The anode of the cathode connection diode D2 of pipe T2；
(4) thyristor T4 is in parallel with thyristor T5 is connected in parallel with inductance L1, and the anode of thyristor T4, thyristor T5
Cathode is connect with a terminal of inductance L1, another terminal of the cathode of thyristor T4, the anode of thyristor T5 and inductance L1
Connection；
(5) anode of diode D1 is connect with the anode of thyristor T4；
(6) capacitor C1 is connect with diode D2；
(7) thyristor T3 anode is connect with diode D2 cathode, and thyristor T3 cathode is connect with diode D1 cathode；
(8) thyristor T6 anode is connect with diode D2 anode, and thyristor T6 cathode is connect with diode D1 anode.
The short circuit current blocks circuit, and there are two port P1 and P2 for tool.
Inductance L1 and capacitor C1 work meets in tandem working state, parameter value:
The wherein frequency of ω electric current between P1, P2.
When circuit of the present invention is connected in AC power cord, does not start block function, the control electrode of thyristor T1, T2 are believed
Number be high level, thyristor T3, T4, T5, T6 control electrode signal be low level.Electric current is along P1-D1-L1-C1-D2-P2 at this time
Or the path circulation of P2-T2-C1-L1-P1 blocks circuit not generate pressure substantially due to L1, C1 work and series resonance state
Drop.
When circuit of the present invention is connected in AC power cord, after starting block function, the control electrode signal of thyristor T1, T2
For low level, thyristor T3, T4, T5, T6 control electrode signal is high level.Inductance L1 is short-circuited at this time, and P1 flows to P2 if it exists
Electric current, then current flow paths be P1-D1-T4-C1-D2-P2, P2 flows to the electric current of P1 if it exists, then current flow paths
For P2-T3-T4-C1-T6-P1；No matter current direction i.e. between P1, P2, charged by T4 to capacitor C1 one direction, most
Make capacitor C1 voltage sufficiently high eventually, blocks electric current between P1, P2.
Fig. 2 is that short circuit current of the invention blocks equivalent circuit diagram of the circuit in inactive block function.At this time in Fig. 1
Thyristor T1, T2 control electrode signal be high level, thyristor T3, T4, T5, T6 control electrode signal be low level, the present invention
Circuit can be equivalent to structure shown in Fig. 2, and wherein inductance L1, capacitor C1 work in series resonance state.
Fig. 3 is that a kind of short circuit current of the present invention blocks equivalent circuit diagram of the circuit after starting block function.Brilliant lock at this time
The control electrode signal of pipe T1, T2 are low level, and thyristor T3, T4, T5, T6 control electrode signal is high level, this circuit can be equivalent
It is a half-controlled rectifier circuit for structure shown in Fig. 3, it, can be by blocking electricity to capacitor charging no matter current direction
Stream circulation.
Input and output voltage waveform when Fig. 4 is circuit of the present invention inactive block function, wherein (a) is input voltage
Voltage waveform at waveform, that is, P1；It (b) is voltage waveform at output voltage waveforms, that is, P2.It can be seen that Fig. 4 (b) waveform and Fig. 4 (a)
Waveform it is almost the same；I.e. inactive block function when this circuit on former route substantially without influence.
Fig. 5 uses circuit of the present invention, and short trouble occurs in power grid, starts input-output wave shape after block function, wherein
It (a) is input voltage waveform；(b) it is output voltage waveforms, (c) is input side current waveform.Route breaks down at 0.1s,
From Fig. 5 (a) it can be seen that restoring normal after input voltage brief fluctuations rapidly, 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 to be quickly decreased to 0 again after short circuit increases, i.e. this circuit has blocked rapidly short circuit current.
The result of invention: a kind of short circuit current blocking circuit is given in the present invention, and soft using the emulation of the power supply of profession
Part Saber has carried out simulating, verifying to the circuit.From simulation result, it can be seen that, the program can rapidly be hindered in line fault
Disconnected short circuit current, while voltage when route works normally, compared to protective device, circuit response speed of the present invention are not influenced
Fastly, control method is flexible, with good application prospect.
It should be understood that the part that this specification does not elaborate belongs to the prior art.
It should be understood that the above-mentioned description for preferred embodiment is more detailed, can not therefore be considered to this
The limitation of invention patent protection range, those skilled in the art under the inspiration of the present invention, are not departing from power of the present invention
Benefit requires to make replacement or deformation under protected ambit, fall within the scope of protection of the present invention, this hair
It is bright range is claimed to be determined by the appended claims.
Claims (5)
1. a kind of short circuit current blocks circuit, including an inductance L1, a capacitor C1, two diodes D1, D2 and six crystalline substances
Brake tube T1, T2, T3, T4, T5, T6, it is characterised in that:
(1) inductance L1 and capacitor C1 is connected in series；
(2) thyristor T1 and diode D1 is connected in parallel, and the cathode of the positive grade connection diode D1 of thyristor T1, thyristor T1
Cathode connection diode D1 anode；
(3) thyristor T2 and diode D2 is connected in parallel；And the cathode of the positive grade connection diode D2 of thyristor T2, thyristor T2
Cathode connection diode D2 anode；
(4) thyristor T4 is in parallel with thyristor T5 is connected in parallel with inductance L1, and the cathode of the anode of thyristor T4, thyristor T5
It is connect with a terminal of inductance L1, cathode, the anode of thyristor T5 of thyristor T4 is connect with another terminal of inductance L1；
(5) cathode of diode D1 is connect with the anode of thyristor T4；
(6) capacitor C1 is connect with diode D2；
(7) thyristor T3 anode is connect with diode D2 cathode, and thyristor T3 cathode is connect with diode D1 cathode；
(8) thyristor T6 anode is connect with diode D2 anode, and thyristor T6 cathode is connect with diode D1 anode.
2. a kind of short circuit current as described in claim 1 blocks circuit, it is characterised in that: there are two port P1 for the circuit tool
And P2.
3. a kind of short circuit current as claimed in claim 2 blocks circuit, it is characterised in that: inductance L1 and capacitor C1 work is being gone here and there
Join working condition, parameter value meets:
Wherein, between ω P1, P2 electric current frequency.
4. a kind of short circuit current blocks circuit as claimed in claim 2 or claim 3, it is characterised in that: when circuit is connected on alternating current
In the line of source, when not starting block function, the control electrode signal of thyristor T1, T2 are high level, thyristor T3, T4, T5, T6 control
Pole signal is low level, and electric current circulates along the path of P1-D1-L1-C1-D2-P2 or P2-T2-C1-L1-P1 at this time, due to
L1, C1 work and series resonance state, block circuit not generate pressure drop substantially.
5. a kind of short circuit current blocks circuit as claimed in claim 2 or claim 3, it is characterised in that: when circuit is connected on alternating current
In the line of source, after starting block function, the control electrode signal of thyristor T1, T2 are low level, thyristor T3, T4, T5, T6 control electrode
Signal is high level, and inductance L1 is short-circuited at this time, and P1 flows to the electric current of P2 if it exists, then current flow paths are P1-D1-T4-
C1-D2-P2, P2 flows to the electric current of P1 if it exists, then current flow paths are P2-T3-T4-C1-T6-P1；Though i.e. P1, P2 it
Between current direction how, by T4 give capacitor C1 one direction charging, finally make capacitor C1 voltage 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 |
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| 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 |
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| Publication Number | Publication Date |
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| CN107171303A CN107171303A (en) | 2017-09-15 |
| CN107171303B true CN107171303B (en) | 2019-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710384387.9A Active CN107171303B (en) | 2017-05-26 | 2017-05-26 | A kind of short circuit current blocking circuit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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 |
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| Publication number | Publication date |
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| CN107171303A (en) | 2017-09-15 |
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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 |