CN107359590A - A kind of direct current network short circuit current blocks circuit - Google Patents
A kind of direct current network short circuit current blocks circuit Download PDFInfo
- Publication number
- CN107359590A CN107359590A CN201710635688.4A CN201710635688A CN107359590A CN 107359590 A CN107359590 A CN 107359590A CN 201710635688 A CN201710635688 A CN 201710635688A CN 107359590 A CN107359590 A CN 107359590A
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- Prior art keywords
- circuit
- switching tube
- direct current
- current
- blocks
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- 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
- H02H3/087—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 for dc applications
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention belongs to electric and electronic technical field, and in particular to a kind of direct current network short circuit current blocks circuit.The circuit includes an electric capacity C1, a diode D1 and a switching tube S1.Circuit connected in series of the present invention is operated in direct current network, when short trouble does not occur, switching tube S1 conductings, does not produce pressure drop substantially；After short trouble occurs, by controlling S1 to turn off, short circuit current can be blocked quickly through electric capacity.Compared with conventional power electronics type fault current limiter, circuit fast response time of the present invention, circuit is simple, and control method is flexible, 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 electric and electronic technical field, and in particular to a kind of direct current network short circuit current blocks circuit.
Background technology
After short trouble occurs for direct current network, for the further expansion of fault restriction scope, ensure the safety of system
Reliability service is, it is necessary to take measures fast and effectively to limit or block short circuit current, because direct current network is mostly using electric power electricity
Sub- equipment, inertial element is less, so the short trouble diffusion of direct current network is fast, it is necessary to quickly cut off failure.
Conventional method is to block short circuit current using devices such as fuse or breakers, but fuse belongs to disposable production
Product, need to change in time after fusing, and breaker actuation needs certain time, it is impossible to meet the requirement of some sensitive loads.With
AC network is compared, and direct current network does not have short circuit current zero crossing, and the difficulty of arc extinguishing is larger, and the breaker development of Large Copacity is stranded
It is difficult.In recent years, as the continuous development of power electronic devices, new material and control chip, various New Fault Current Limiters are successive
Occur, including power electronics type (also known as solid-state version), superconductor type, explosion type etc..But existing direct-current short circuit failure limit
Stream device is only capable of limiting short-circuit current, breaker need to be coordinated to use, can not fully met to quickly blocking short circuit during electric network fault
The demand of electric current.
The content of the invention
It is quick during it is an object of the invention to for direct current network failure in order to overcome above-mentioned the shortcomings of the prior art
The demand of short circuit current is blocked, so as to propose that a kind of direct current network short circuit current blocks circuit, with conventional power electronics type failure
Current limiter is compared, 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 breaking
Road device uses.
In order to achieve the above object, the technical solution adopted in the present invention is：A kind of direct current network short circuit current blocks electricity
Road, including an electric capacity C1, a diode D1 and a switching tube S1, it is characterised in that：
(1) electric capacity C1, diode D1, switching tube S1 are connected in series；
(2) an electric capacity C1 pole is connected with diode D1 negative electrode, and another pole is connected with switching tube S1 emitter stage, two poles
Pipe D1 anode is connected with switching tube S1 colelctor electrode.
Further, the circuit has input port a P1, an output port P2；Wherein P1 is located at switching tube S1
Colelctor electrode, P2 is located at switching tube S1 emitter stage.
Further, the switching tube S1 is full-control type semiconductor devices, using IGBT, metal-oxide-semiconductor, GTO or IGCT devices
Part.
Further, when circuit connected in series is in direct current network, when not starting block function, switching tube S1 control pole letter
Number it is high level, now path circulation of the electric current along P1-S1-P2, because S1 conduction impedances are smaller, blocks circuit not produce substantially
Raw pressure drop.
Further, when circuit connected in series is in direct current network, when starting block function, switching tube S1 control pole signal
For low level, now path circulation of the electric current along P1-D1-C1-P2, charges to electric capacity C1 one directions, finally causes electric capacity C1
Voltage is sufficiently high, blocks 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 direct current supply line, when
When short trouble not occurring, circuit of the present invention works in normal mode, blocks circuit not produce pressure drop substantially, does not influence primary circuit
Performance.(2) after short trouble occurs, the control pole signal that circuit of the present invention passes through controlling switch pipe S1 is low level, can be fast
Speed blocks short circuit current.(3) circuit of the present invention can be used as dc circuit breaker use, and other fault current limiters can only limit direct current
Short-circuit current, it is impossible to block fault current, breaker need to be coordinated to use.(4) circuit of the present invention is simple, easy to control.
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.
Fig. 4 is to use circuit of the present invention, and short trouble occurs in direct current network, starts input and output ripple after block function
Shape, wherein, (a) is input dc power corrugating；(b) it is output DC voltage waveform, (c) is input side current waveform.
Embodiment
For the ease of those of ordinary skill in the art understand and implement the present invention, the present invention is made with reference to embodiment 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, and is not used to limit
The fixed present invention.
If Fig. 1 is the topological structure signal that a kind of direct current network short circuit current provided in an embodiment of the present invention blocks circuit
Figure, including an electric capacity C1, a diode D1 and a switching tube S1, it is characterised in that：
(1) switching tube S1 is full-control type semiconductor devices, the device such as including but not limited to IGBT, metal-oxide-semiconductor, GTO, IGCT,
The embodiment of the present invention is described by taking IGBT as an example；
(2) electric capacity C1, diode D1, switching tube S1 are connected in series；
(3) an electric capacity C1 pole is connected with diode D1 negative electrode, and another pole is connected with switching tube S1 emitter stage, two poles
Pipe D1 anode is connected with switching tube S1 colelctor electrode.
The circuit has input port a P1, an output port P2.
When circuit connected in series is in direct current network, when not starting block function, switching tube S1 control pole signal is high electricity
Flat, now path circulation of the electric current along P1-S1-P2, because S1 conduction impedances are smaller, blocks circuit not produce pressure drop substantially.
When circuit connected in series is in direct current network, when starting block function, switching tube S1 control pole signal is low level,
Now path circulation of the electric current along P1-D1-C1-P2, charges to electric capacity C1 one directions, finally make it that electric capacity C1 voltages are enough
Height, block electric current between P1, P2.
The short circuit current that Fig. 2 is the present invention blocks equivalent circuit diagram of the circuit in not actuated block function.Now switch
Pipe S1 control pole signal is high level, and circuit of the present invention can be equivalent to structure shown in Fig. 2, and switching tube is fully on, can recognize
For pressure drop very little.
Fig. 3 is that a kind of direct current network short circuit current of the present invention blocks equivalent circuit diagram of the circuit after block function is started.
Switching tube S1 control pole signal is low level, and this circuit can be equivalent to structure shown in Fig. 3, and now diode is generated to electricity in electric current edge
Hold the charging of C1 one directions, finally make it that electric capacity C1 voltages are sufficiently high, block electric current between P1, P2.
Fig. 4 uses circuit of the present invention, and short trouble occurs in direct current network, starts input-output wave shape after block function,
Wherein, (a) is input dc power corrugating；(b) it is output DC voltage waveform, (c) is input side current waveform.Circuit exists
Broken down at 100ms, from Fig. 4 (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. 4 (b) it can be seen that output voltage is quickly decreased to 0 after short trouble generation；Can be with from Fig. 4 (c)
Input side electric current is seen because being quickly decreased to 0 again after short circuit increase occurs, i.e. this circuit has blocked rapidly short circuit current.
The result of invention：A kind of direct current network short circuit current is given in the present invention and blocks circuit, and utilizes the electricity of specialty
Simulation software Saber in source has carried out simulating, verifying to the circuit.From simulation result it can be seen that, program energy in line fault
Voltage when rapidly blocking short circuit current, while not influenceing circuit normal work, compared to protection device, circuit of the present invention rings
Answer speed fast, circuit is simple, and control method is flexible, has preferable application prospect.
It should be appreciated that the part that this specification does not elaborate belongs to prior art.
It should be appreciated that the above-mentioned description for preferred embodiment is more detailed, therefore can not be considered to this
The limitation of invention patent protection scope, one of ordinary skill in the art are 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 deformation, be each fallen 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 direct current network short circuit current blocks circuit, including an electric capacity C1, a diode D1 and a switching tube S1,
It is characterized in that：
(1) electric capacity C1, diode D1, switching tube S1 are connected in series；
(2) an electric capacity C1 pole is connected with diode D1 negative electrode, and another pole is connected with switching tube S1 emitter stage, diode D1
Anode be connected with switching tube S1 colelctor electrode.
2. a kind of direct current network short circuit current as claimed in claim 1 blocks circuit, it is characterised in that：The circuit has one
Individual input port P1, an output port P2；Wherein P1 is located at switching tube S1 colelctor electrode, and P2 is located at switching tube S1 transmitting
Pole.
3. a kind of direct current network short circuit current as claimed in claim 1 blocks circuit, it is characterised in that：The switching tube S1 is
Full-control type semiconductor devices, using IGBT, metal-oxide-semiconductor, GTO or IGCT devices.
4. a kind of direct current network short circuit current as claimed in claim 1 or 2 blocks circuit, it is characterised in that：Work as circuit connected in series
When in direct current network, when not starting block function, switching tube S1 control pole signal is high level, and now electric current is along P1-
S1-P2 path circulation, because S1 conduction impedances are smaller, blocks circuit not produce pressure drop substantially.
5. a kind of direct current network short circuit current as claimed in claim 1 or 2 blocks circuit, it is characterised in that：Work as circuit connected in series
When in direct current network, when starting block function, switching tube S1 control pole signal is low level, and now electric current is along P1-D1-
C1-P2 path circulation, charges to electric capacity C1 one directions, finally make it that electric capacity C1 voltages are sufficiently high, blocks electric current between P1, P2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710635688.4A CN107359590A (en) | 2017-07-31 | 2017-07-31 | A kind of direct current network short circuit current blocks circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710635688.4A CN107359590A (en) | 2017-07-31 | 2017-07-31 | A kind of direct current network short circuit current blocks circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107359590A true CN107359590A (en) | 2017-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710635688.4A Pending CN107359590A (en) | 2017-07-31 | 2017-07-31 | A kind of direct current network short circuit current blocks circuit |
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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 |
| CN114221309A (en) * | 2021-12-15 | 2022-03-22 | 湖北工业大学 | Short-circuit current bidirectional blocking circuit formed by current transformers and fault blocking method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050280972A1 (en) * | 2004-06-21 | 2005-12-22 | Abb Research Ltd. | Control circuit |
| CN103346528A (en) * | 2013-06-27 | 2013-10-09 | 浙江大学 | Current limiting type hybrid direct-current circuit breaker based on power electronic combination switch |
| CN105281288A (en) * | 2015-10-22 | 2016-01-27 | 中国科学院电工研究所 | Direct current breaker topology with bidirectional blocking function |
| CN205647264U (en) * | 2016-05-26 | 2016-10-12 | 中国石油大学(华东) | Three level submodule pieces of MMC with direct current short -circuit current is from scavenging ability |
-
2017
- 2017-07-31 CN CN201710635688.4A patent/CN107359590A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050280972A1 (en) * | 2004-06-21 | 2005-12-22 | Abb Research Ltd. | Control circuit |
| CN103346528A (en) * | 2013-06-27 | 2013-10-09 | 浙江大学 | Current limiting type hybrid direct-current circuit breaker based on power electronic combination switch |
| CN105281288A (en) * | 2015-10-22 | 2016-01-27 | 中国科学院电工研究所 | Direct current breaker topology with bidirectional blocking function |
| CN205647264U (en) * | 2016-05-26 | 2016-10-12 | 中国石油大学(华东) | Three level submodule pieces of MMC with direct current short -circuit current is from scavenging ability |
Non-Patent Citations (1)
| Title |
|---|
| 向往等: "一种能够阻断直流故障电流的新型子模块拓扑及混合型模块化多电平换流器", 《中国电机工程学报》 * |
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 |
| CN114221309A (en) * | 2021-12-15 | 2022-03-22 | 湖北工业大学 | Short-circuit current bidirectional blocking circuit formed by current transformers and fault blocking method |
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Application publication date: 20171117 |