CN106877301A - A kind of high voltage DC breaker and test method - Google Patents
A kind of high voltage DC breaker and test method Download PDFInfo
- Publication number
- CN106877301A CN106877301A CN201710245917.1A CN201710245917A CN106877301A CN 106877301 A CN106877301 A CN 106877301A CN 201710245917 A CN201710245917 A CN 201710245917A CN 106877301 A CN106877301 A CN 106877301A
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- Prior art keywords
- branch road
- switch
- current
- solid
- igbt
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
Abstract
The invention discloses a kind of high voltage DC breaker and test method, it is made up of four parallel branch two ends two current-limiting reactors of series connection, this four parallel branch tie points are main branch, and tie point is main branch, are composed in series by quick isolation switch K and auxiliary quick closing valve T0；Second branch road is transfer branch road, is made up of solid-state switch, and the solid-state switch is composed in series by several IGBT modules, and each IGBT module is by two IGBT differential concatenations, and the anti-parallel diodes on each IGBT；The buffer loop that 3rd branch road is made up of resistance and capacitances in series；4th branch road is the energy absorption loop being made up of Zinc-Oxide Arrester, the present invention can realize it is two-way rapidly switch off, and simple structure is easy to make, practical.
Description
Technical field
The present invention relates to a kind of dc circuit breaker and test method, especially a kind of high voltage DC breaker and experiment side
Method, belongs to technical field of electric power.
Background technology
As economic continues to develop, because fossil energy is exhausted and exploitation difficulty increase, while causing serious ring
Border problem.In recent years, the new energy such as solar power generation, fuel cell, wind-power electricity generation obtain large-scale promotion application, same in this
When, occur in that a large amount of DC loads such as electric automobile, frequency conversion equipment, LED illuminating lamps, information equipment.And direct-current micro-grid, as
The access form of distributed power source and DC load higher efficiency, with line loss it is low, transmission capacity is big, long transmission distance,
The quality of power supply is high and the advantages of sex chromosome mosaicism stable in the absence of system synchronization, the development trend as current power system.
And dc circuit breaker is the visual plant of direct current micro-grid system, the crucial work of power equipment in fault trip and protection system is played
With the dc circuit breaker of shortage practicality at present.
The content of the invention
The purpose of the present invention is：For the power system development trend of development direct-current micro-grid at present, there is provided a kind of direct current breaks
Road device scheme, the dc circuit breaker includes current-limiting circuit and four parallel branches connected in series.Current-limiting circuit is by current-limiting inductance
Constitute；Tie point is mechanical switch in four parallel branches, and the mechanical switch is used for turning on normal load electric current；Second branch road
It is solid-state switch, for turning off bi-directional failure electric current；3rd branch road is buffer loop, is made up of resistance, capacitances in series；4th
Road is absorption circuit, is made up of Zinc-Oxide Arrester, for buffering and line inductance energy when absorption is cut-off, reduces solid-state switch
Voltage build-up rate and solid switch device is protected not threatened by overvoltage.The dc circuit breaker can realize two-way rapidly switching off.
The technical scheme is that：A kind of high voltage DC breaker, including the first current-limiting reactor, the second current-limiting reactor
Device and electric branch circuit, described the first current-limiting reactor, electric branch circuit and the second current-limiting reactor constitute series circuit successively.
Described electric branch circuit includes tie point, the second branch road, the 3rd branch road and the 4th branch road, described first
Road, the second branch road, the 3rd branch road and the 4th branch road are parallel connection.
Described tie point is connected by quick isolation switch and auxiliary switch.
The second described branch road includes being composed in series by least one IGBT module；Each IGBT module is anti-by two IGBT
To series connection, and the anti-parallel diodes on each IGBT.
The 3rd described routing resistance and capacitances in series are constituted.
The 4th described branch road is the energy absorption loop that Zinc-Oxide Arrester is constituted.
Described auxiliary switch is by two IGBT differential concatenations, and the anti-parallel diodes on each IGBT.
Test method, comprises the following steps：
The first step, closing operation：The solid-state switch T for first triggering the second branch road is turned it on, and and then closes the fast of tie point
Fast disconnecting switch K, then auxiliary switch T0 is turned on, it is turned under no-voltage, turn off second after confirming tie point conducting
The solid-state switch on road makes its out of service.
Second step：Sub-switching operation：When receiving separating brake order or detecting short circuit current more than action setting value, immediately
Send and touch logical second branch road solid-state switch and shut-off tie point auxiliary switch signal, produced when tie point auxiliary switch is turned off
Overvoltage force electric current in the second branch road solid-state switch shift, after electric current is transferred to the second branch road solid-state switch completely,
Tie point quick isolation switch is disconnected without arc；Cut-off signals are sent then to the second branch road solid-state switch T, its all IGBT valve
Group is rapidly switched off.
By adopting the above-described technical solution, compared with prior art, IGBT module is by two power electronics in the present invention
Element IGBT differential concatenations, and the anti-parallel diodes on each IGBT, can realize that electric current is two-way and rapidly switch off.First
Road and the second branch circuit parallel connection, load current is flowed through when normal by tie point, when switch needs to be switched on or off,
Using the second branch road, shunting, pincers pressure are acted in tie point disconnection and closing course, realize tie point disconnected open and close rapidly
Close, be capable of achieving it is two-way rapidly switch off, and be lost it is low.Line inductance energy, drop when snubber loop is cut-off for snubber
Low solid-state switch voltage build-up rate and solid switch device is protected not threatened by overvoltage.The function of current-limiting reactor is that reduction direct current is short
Road current-rising-rate, so as to reduce the requirement to mechanical switch quick-action.Simple structure of the present invention, it is easy to make, it is practical.
Brief description of the drawings
Accompanying drawing 1 is used in the schematic diagram in direct-current micro-grid for the present invention；
Accompanying drawing 2 is schematic structural view of the invention；
It is designated in figure：1st, the first current-limiting reactor, the 2, second current-limiting reactor, 3, quick isolation switch, 4, auxiliary switch, 5,
IGBT, 6, diode, 7, solid-state switch, 8, IGBT, 9, diode, 10, resistance, 11, electric capacity, 12, Zinc-Oxide Arrester.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, but not as any limitation of the invention.
As shown in Figure 1, embodiments of the invention：A kind of high voltage DC breaker, by the first current-limiting reactor 1, second
Current-limiting reactor 2, quick isolation switch 3, auxiliary switch 4, IGBT 5,8, diode 6,9, solid-state switch 7, resistance 10, electric capacity
11st, Zinc-Oxide Arrester 12 is constituted, the first described current-limiting reactor（1）, electric branch circuit and the second current-limiting reactor（2）Successively
Composition series circuit.
Described electric branch circuit includes tie point, the second branch road, the 3rd branch road and the 4th branch road, described first
Road, the second branch road, the 3rd branch road and the 4th branch road are parallel connection.
Described tie point is connected by quick isolation switch 3 and auxiliary switch 4.
Second described at least one solid-state switch 7 of route is composed in series；Each solid-state switch 7 is anti-by two IGBT 8
To series connection, and the anti-parallel diodes 9 on each IGBT 8.
The 3rd described routing resistance 10 and electric capacity 11 are composed in series.
The 4th described branch road is the energy absorption loop that Zinc-Oxide Arrester 12 is constituted.
Described auxiliary switch 4 is by two differential concatenations of IGBT 5, and the anti-parallel diodes 6 on each IGBT 5.
A kind of high voltage DC breaker of the invention, is made up of four parallel branch two ends two current-limiting reactors of series connection,
This four parallel branch tie points are main branch, are composed in series by quick isolation switch K and auxiliary quick closing valve T0, for turning on just
Normal load current；Second branch road is transfer branch road, is made up of solid-state switch, and the solid-state switch is by several IGBT module series connection groups
Into each IGBT module is by two IGBT differential concatenations, and the anti-parallel diodes on each IGBT, and IGBT module is several
According to determined using DC voltage level, the branch road be used for open normal operating current and shut-off bi-directional failure electric current；3rd
The buffer loop that road is made up of resistance and capacitances in series, line inductance energy when being cut-off for buffering reduces solid-state switch electricity
Pressure climbing；4th branch road is the energy absorption loop being made up of Zinc-Oxide Arrester, line inductance energy when being cut-off for absorbing
Amount, protects solid switch device not receive voltage threat.The present invention can realize it is two-way rapidly switch off, and simple structure, making side
Just, it is practical.
Wind-power electricity generation, photovoltaic generation, battery, AC and DC load etc. are changed into the direct current of low pressure grade by transverter
Pressure, is connected on low-voltage direct bus by dc circuit breaker, and some DC loads can be directly connected to low-voltage direct bus
On.Low-voltage direct busbar voltage is boosted by commutator transformer, is connected on middle pressure dc bus by dc circuit breaker.Together
When, fuel cell, miniature gas turbine, middle pressure AC and DC load etc. are changed into the DC voltage of middle pressure grade by transverter, lead to
Dc circuit breaker is crossed to be connected on middle pressure dc bus.It is middle to press dc bus again by DC/AC transverters, by AC circuit breaker
It is connected to AC system.
As shown in Figure 2, the first current-limiting reactor 1, the second current-limiting reactor 2 are wherein described dc circuit breaker structure
Current-limiting reactor, reactor does not embody its reactance characteristic in straight-flow system, thus reactance access to straight-flow system just
Often operation is without influence, and obvious metering function can be played during failure, it is possible to decrease direct-current short circuit current-rising-rate, so as to reduce right
The requirement of mechanical switch quick-action, the two ends that the first current-limiting reactor 1, the second current-limiting reactor 2 are located at solid-state switch can limit
Bi-directional failure electric current.What is connected with two current-limiting reactors is four parallel branches, and tie point is main branch, by quickly isolating
Switch K and auxiliary switch T0 is composed in series, for turning on normal load electric current；Second branch road is transfer branch road, by solid-state switch T
Composition, the solid-state switch is composed in series by several IGBT modules, and IGBT module number is true according to used DC voltage level
Fixed, each IGBT module is used for open-minded by two IGBT differential concatenations, and the anti-parallel diodes on each IGBT, the branch road
Normal operating current and shut-off bi-directional failure electric current；The buffer loop that 3rd branch road is made up of resistance and capacitances in series, is used for
Line inductance energy when buffering is cut-off, reduces solid-state switch voltage build-up rate；4th branch road is made up of Zinc-Oxide Arrester
Energy absorption loop, line inductance energy when being cut-off for absorbing protects solid switch device not receive voltage threat.
According to technical scheme, required equipment and component are attached, you can tested, during experiment
Tested by the following method：
Closing operation：The solid-state switch T for first triggering the second branch road is turned it on, and and then closes quickly isolating out for tie point
K is closed, then turns on auxiliary switch T0, it is turned under no-voltage, confirm that tie point turns off the solid-state of the second branch road after turning on
Switch makes its out of service.After the solid-state switch T closures of the second branch road in the presence of current-limiting inductance, DC current is gradually from zero
Steady-state value is risen to, that is, current-limiting inductance has the effect for suppressing DC current climbing in combined floodgate initial stage, equivalent to right
Making process serves cushioning effect.After making process terminates, dc source powers to the load through tie point, current-limiting inductance
Only there is leveling, therefore device on-state voltage drop and the equal very little of loss to DC ripple.
Sub-switching operation：Including normal separating brake and short-circuit separating brake, both operating process are essentially identical, distinguish simply the former disjunction
Running current, and the latter's disjunction short circuit current, current-limiting reactor play a part of suppression initial stage short circuit current climbing.
When receiving separating brake order or detecting short circuit current and exceed action setting value, send immediately touch logical second branch road solid-state switch and
Shut-off tie point auxiliary switch signal.The overvoltage that tie point auxiliary switch is produced when turning off forces electric current to the second branch road
Shifted in solid-state switch, after electric current is transferred to the second branch road solid-state switch completely, disconnects tie point without arc and quickly isolate out
Close；Cut-off signals are sent then to the second branch road solid-state switch T, its all IGBT valve group is rapidly switched off, resistance, electricity during this
Hold and arrester snubber loop automatically engages work, can effectively slow down the drop-out voltage rate of climb, to ensure valve group institute
The drop-out voltage for undertaking is in the range of its safety operation area.
Claims (8)
1. a kind of high voltage DC breaker, including the first current-limiting reactor（1）, the second current-limiting reactor（2）And electric branch circuit, its
It is characterised by：The first described current-limiting reactor（1）, electric branch circuit and the second current-limiting reactor（2）Series circuit is constituted successively.
2. a kind of high voltage DC breaker according to claim 1, it is characterised in that：Described electric branch circuit includes first
Branch road, the second branch road, the 3rd branch road and the 4th branch road, described tie point, the second branch road, the 3rd branch road and the 4th branch road are
It is in parallel.
3. a kind of high voltage DC breaker according to claim 1, it is characterised in that：Described tie point by quickly every
Leave pass（3）And auxiliary switch（4）Series connection.
4. a kind of high voltage DC breaker according to claim 1, it is characterised in that：Second described route at least
Individual solid-state switch（7）It is composed in series；Each solid-state switch（7）By two IGBT（8）Differential concatenation, and in each IGBT（8）On
Anti-parallel diodes（9）.
5. a kind of high voltage DC breaker according to claim 1, it is characterised in that：The 3rd described routing resistance
（10）And electric capacity（11）It is composed in series.
6. a kind of high voltage DC breaker according to claim 1, it is characterised in that：The 4th described branch road is zinc oxide
Arrester（12）The energy absorption loop of composition.
7. a kind of high voltage DC breaker according to claim 3, it is characterised in that：Described auxiliary switch（4）By two
Individual IGBT（5）Differential concatenation, and the anti-parallel diodes on each IGBT（6）.
8. a kind of test method of high voltage DC breaker, it is characterised in that：Comprise the following steps：
The first step, closing operation：The solid-state switch T for first triggering the second branch road is turned it on, and and then closes the fast of tie point
Fast disconnecting switch K, then auxiliary switch T0 is turned on, it is turned under no-voltage, turn off second after confirming tie point conducting
The solid-state switch on road makes its out of service；
Second step：Sub-switching operation：When receiving separating brake order or detecting short circuit current more than action setting value, send immediately
Touch logical second branch road solid-state switch and shut-off tie point auxiliary switch signal, the mistake that tie point auxiliary switch is produced when turning off
Voltage forces current is shifted in the second branch road solid-state switch, after electric current is transferred to the second branch road solid-state switch completely, without arc
Tie point quick isolation switch is disconnected, cut-off signals are sent then to the second branch road solid-state switch T, its all IGBT valve group is equal
Rapidly switch off.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710245917.1A CN106877301A (en) | 2017-04-14 | 2017-04-14 | A kind of high voltage DC breaker and test method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710245917.1A CN106877301A (en) | 2017-04-14 | 2017-04-14 | A kind of high voltage DC breaker and test method |
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Cited By (12)
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| CN106972479A (en) * | 2017-04-21 | 2017-07-21 | 贵州电网有限责任公司 | The design method and high-low pressure dc circuit breaker of a kind of direct-current grid |
| CN107834522A (en) * | 2017-10-25 | 2018-03-23 | 华北电力大学 | The sequential of the high voltage DC breaker back-up protection of novel topological structure determines |
| CN107947106A (en) * | 2017-11-27 | 2018-04-20 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of direct current cutting system major loop topological structure |
| CN108011349A (en) * | 2017-12-14 | 2018-05-08 | 周方 | A kind of two-way no electric arc mixing breaker and its method of work |
| CN109742740A (en) * | 2018-12-19 | 2019-05-10 | 华北电力大学 | A kind of reciprocal current-limiting type high-voltage direct-current breaker topology of modular type |
| CN110071487A (en) * | 2018-01-22 | 2019-07-30 | 伊顿智能动力有限公司 | Electric protection circuit arrangement |
| CN110993402A (en) * | 2019-11-08 | 2020-04-10 | 北京科技大学 | Bidirectional on-off hybrid direct current circuit breaker |
| WO2020133239A1 (en) * | 2018-12-28 | 2020-07-02 | 华为技术有限公司 | Photovoltaic direct current breaking device |
| CN111509681A (en) * | 2020-04-23 | 2020-08-07 | 广东电网有限责任公司东莞供电局 | Solid-state direct-current circuit breaker sharing energy consumption branch and application method thereof |
| WO2020244015A1 (en) * | 2019-06-04 | 2020-12-10 | 上海交通大学 | Direct current limiter topology suitable for flexible direct current transmission system |
| CN112615611A (en) * | 2020-12-22 | 2021-04-06 | 广东电网有限责任公司 | Multiport direct current breaker and multiport direct current system |
| CN114725910A (en) * | 2022-06-09 | 2022-07-08 | 广东电网有限责任公司珠海供电局 | Device and method for suppressing inrush current of port of direct-current transformer |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972479B (en) * | 2017-04-21 | 2020-02-14 | 贵州电网有限责任公司 | Design method of direct-current micro-grid and high-low-voltage direct-current circuit breaker |
| CN106972479A (en) * | 2017-04-21 | 2017-07-21 | 贵州电网有限责任公司 | The design method and high-low pressure dc circuit breaker of a kind of direct-current grid |
| CN107834522A (en) * | 2017-10-25 | 2018-03-23 | 华北电力大学 | The sequential of the high voltage DC breaker back-up protection of novel topological structure determines |
| CN107947106A (en) * | 2017-11-27 | 2018-04-20 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of direct current cutting system major loop topological structure |
| CN107947106B (en) * | 2017-11-27 | 2019-05-14 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | A kind of direct current cutting system major loop topological structure |
| CN108011349A (en) * | 2017-12-14 | 2018-05-08 | 周方 | A kind of two-way no electric arc mixing breaker and its method of work |
| CN110071487B (en) * | 2018-01-22 | 2021-12-21 | 伊顿智能动力有限公司 | Electrical protection circuit arrangement |
| CN110071487A (en) * | 2018-01-22 | 2019-07-30 | 伊顿智能动力有限公司 | Electric protection circuit arrangement |
| CN109742740A (en) * | 2018-12-19 | 2019-05-10 | 华北电力大学 | A kind of reciprocal current-limiting type high-voltage direct-current breaker topology of modular type |
| WO2020133239A1 (en) * | 2018-12-28 | 2020-07-02 | 华为技术有限公司 | Photovoltaic direct current breaking device |
| US11539326B2 (en) | 2018-12-28 | 2022-12-27 | Huawei Digital Power Technologies Co., Ltd. | Photovoltaic direct-current breaking apparatus |
| WO2020244015A1 (en) * | 2019-06-04 | 2020-12-10 | 上海交通大学 | Direct current limiter topology suitable for flexible direct current transmission system |
| CN110993402A (en) * | 2019-11-08 | 2020-04-10 | 北京科技大学 | Bidirectional on-off hybrid direct current circuit breaker |
| CN111509681A (en) * | 2020-04-23 | 2020-08-07 | 广东电网有限责任公司东莞供电局 | Solid-state direct-current circuit breaker sharing energy consumption branch and application method thereof |
| CN112615611A (en) * | 2020-12-22 | 2021-04-06 | 广东电网有限责任公司 | Multiport direct current breaker and multiport direct current system |
| CN114725910A (en) * | 2022-06-09 | 2022-07-08 | 广东电网有限责任公司珠海供电局 | Device and method for suppressing inrush current of port of direct-current transformer |
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