CN106877300A - A kind of low-voltage direct breaker and test method - Google Patents
A kind of low-voltage direct breaker and test method Download PDFInfo
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- CN106877300A CN106877300A CN201710245079.8A CN201710245079A CN106877300A CN 106877300 A CN106877300 A CN 106877300A CN 201710245079 A CN201710245079 A CN 201710245079A CN 106877300 A CN106877300 A CN 106877300A
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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
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Abstract
The invention discloses a kind of dc circuit 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, are made up of mechanical switch；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 low-voltage direct 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, line inductance energy when being cut-off for absorbing, and is reduced on solid-state switch voltage
Rising rate and protects solid switch device not threatened by overvoltage.The dc circuit breaker can realize two-way rapidly switching off.
The technical scheme is that：A kind of low-voltage direct 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 made up of mechanical switch.
Second described at least one IGBT module of route is composed in series；Each IGBT module is reversely gone here and there by two IGBT
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.
Test method, comprises the following steps：
The first step, closing operation：First triggering solid-state switch T is turned it on, and and then closes mechanical switch K, makes it in no-voltage
Lower conducting, shut-off solid-state switch makes its out of service after confirming mechanical switch conducting；
Second step, sub-switching operation：Including normal separating brake and short-circuit separating brake, surpass receiving separating brake order or detecting short circuit current
When crossing action setting value, disjunction mechanical switch being sent immediately and logical solid-state switch signal is touched, hereafter mechanical switch is through a period of time
Start the separating brake starting the arc after time delay, after electric current is forced to be transferred in solid-state switch, cut-off signals are sent to solid-state switch, its is fast
Speed shut-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.Electric power electricity
Together with sub switch is in parallel with mechanical switch, load current is flowed through by mechanical switch when normal, open or close in switch needs
When disconnected, disconnected in mechanical switch using IGBT and being acted on shunting, pincers pressure in closing course, realize that mechanical switch disconnects rapidly
And closure, be capable of achieving it is two-way rapidly switch off, and be lost it is low.Line inductance energy when snubber loop is cut-off for snubber
Measure, reduce solid-state switch voltage build-up rate and protect solid switch device not threatened by overvoltage.The function of current-limiting reactor is to reduce
Direct-current short circuit 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 real
It is strong with property.
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, mechanical switch, 4, diode, 5, IGBT,
6th, IGBT module, 7, electric capacity, 8, resistance, 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.
Embodiments of the invention：A kind of low-voltage direct breaker, as shown in Figure 1, wind-power electricity generation, photovoltaic generation, electric power storage
Pond, AC and DC load etc. are changed into the DC voltage of low pressure grade by transverter, and low-voltage direct is connected to by dc circuit breaker
On bus, some DC loads can be directly connected on low-voltage direct bus.Low-voltage direct busbar voltage is by direct current transformation
Device boosts, and is connected on middle pressure dc bus by dc circuit breaker.Meanwhile, fuel cell, miniature gas turbine, middle pressure hand over,
DC load etc. is changed into the DC voltage of middle pressure grade by transverter, and middle pressure dc bus is connected to by dc circuit breaker
On.Middle pressure dc bus is connected to AC system again by DC/AC transverters by AC circuit breaker.
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 mechanical switch
K is constituted, for turning on normal load electric current；Second branch road for transfer branch road, be made up of solid-state switch T, if the solid-state switch by
A dry IGBT module is composed in series, IGBT module number according to determined using DC voltage level, each IGBT module is by two
Individual IGBT differential concatenations, and the anti-parallel diodes on each IGBT, the branch road are used for opening 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, line inductance when being cut-off for buffering
Energy, reduces solid-state switch voltage build-up rate；4th branch road is the energy absorption loop being made up of Zinc-Oxide Arrester, for inhaling
Line inductance energy when receipts are cut-off, protects solid switch device not receive voltage threat.
According to technical scheme, required equipment and component are attached, you can tested, during experiment
Carry out by the following method：
Closing operation：First triggering solid-state switch T is turned it on, and and then closes mechanical switch K, it is turned under no-voltage,
Shut-off solid-state switch makes its out of service after confirming mechanical switch conducting.After solid-state switch T closures in the presence of current-limiting inductance,
DC current is gradually raised to steady-state value from above freezing, that is, current-limiting inductance has suppression DC current climbing in combined floodgate initial stage
Effect, serve cushioning effect equivalent to making process.After making process terminates, dc source is through mechanical switch to load
Power supply, current-limiting inductance only has 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 more than action setting value, disjunction mechanical switch is sent immediately and logical solid-state is touched
Switching signal, the arc voltage that hereafter mechanical switch starts between the separating brake starting the arc, contact after a period of time time delay gradually rises, and touches
Resistance between head gradually increases, and electric current is forced to be transferred in the middle of solid-state switch T, due to the solid-state switch pressure drop very little for turning on, this
Stage is referred to as " no-voltage " stage, as " no-voltage " change of current, while by arc voltage clamper on solid-state switch on-state voltage drop,
Hereafter mechanical switch smooth disjunction in the case of low-voltage low current.Cut-off signals are sent then to solid-state switch T, it owns
IGBT valve groups are rapidly switched off, and resistance, electric capacity and arrester snubber loop automatically engage work during this, can effectively subtract
The slow drop-out voltage rate of climb, to ensure drop-out voltage that valve group undertaken in the range of its safety operation area.
Claims (7)
1. a kind of low-voltage direct 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 low-voltage direct 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 low-voltage direct breaker according to claim 1, it is characterised in that：Described tie point is opened by machinery
Close（3）Composition.
4. a kind of low-voltage direct breaker according to claim 1, it is characterised in that：Second described route at least
Individual IGBT module（6）It is composed in series；Each IGBT module（6）By two IGBT units（5）Differential concatenation, and it is mono- in each IGBT
Unit（5）Upper anti-parallel diodes（4）.
5. a kind of low-voltage direct breaker according to claim 1, it is characterised in that：The 3rd described routing resistance
（8）And electric capacity（7）It is composed in series.
6. a kind of low-voltage direct breaker according to claim 1, it is characterised in that：The 4th described branch road is zinc oxide
Arrester（9）The energy absorption loop of composition.
7. a kind of test method of low-voltage direct breaker, it is characterised in that：Comprise the following steps：
The first step, closing operation：First triggering solid-state switch T is turned it on, and and then closes mechanical switch K, makes it in no-voltage
Lower conducting, shut-off solid-state switch makes its out of service after confirming mechanical switch conducting；
Second step, sub-switching operation：Including normal separating brake and short-circuit separating brake, surpass receiving separating brake order or detecting short circuit current
When crossing action setting value, disjunction mechanical switch being sent immediately and logical solid-state switch signal is touched, hereafter mechanical switch is through a period of time
Start the separating brake starting the arc after time delay, after electric current is forced to be transferred in solid-state switch, cut-off signals are sent to solid-state switch, its is fast
Speed shut-off.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710245079.8A CN106877300A (en) | 2017-04-14 | 2017-04-14 | A kind of low-voltage direct breaker and test method |
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| CN201710245079.8A CN106877300A (en) | 2017-04-14 | 2017-04-14 | A kind of low-voltage direct breaker and test method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107565520A (en) * | 2017-08-22 | 2018-01-09 | 全球能源互联网研究院 | A kind of dc circuit breaker principal and subordinate cooperative control method and control system |
| CN109119981A (en) * | 2018-09-29 | 2019-01-01 | 南京南瑞继保电气有限公司 | A kind of DC Line Fault current-limiting apparatus and system and its Current limited Control method |
| CN109586264A (en) * | 2018-12-14 | 2019-04-05 | 华北电力大学 | A kind of high voltage DC breaker semiconductor component protection circuit |
| CN109600032A (en) * | 2018-11-28 | 2019-04-09 | 广东电网有限责任公司电力科学研究院 | A kind of snubber circuit for solid-state switch |
| CN112865061A (en) * | 2021-01-07 | 2021-05-28 | 天津大学 | Direct current load switch based on power electronic device and switching method thereof |
| CN114050073A (en) * | 2021-11-09 | 2022-02-15 | 许昌许继软件技术有限公司 | Direct current switch device and control method thereof |
| WO2023035440A1 (en) * | 2021-09-09 | 2023-03-16 | 株洲福德轨道交通研究院有限公司 | Low-voltage hybrid direct-current circuit breaker |
| CN117134602A (en) * | 2023-07-18 | 2023-11-28 | 国网天津市电力公司 | IGBT module parallel circuit with overvoltage suppression and current sharing performance and control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647248A (en) * | 2013-11-14 | 2014-03-19 | 许继集团有限公司 | High-voltage DC rapid breaker |
| CN204732355U (en) * | 2015-04-02 | 2015-10-28 | 南方电网科学研究院有限责任公司 | The hybrid DC circuit breaker of a kind of nature commutation type |
| CN207010216U (en) * | 2017-04-14 | 2018-02-13 | 贵州电网有限责任公司 | A kind of low-voltage direct breaker |
-
2017
- 2017-04-14 CN CN201710245079.8A patent/CN106877300A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647248A (en) * | 2013-11-14 | 2014-03-19 | 许继集团有限公司 | High-voltage DC rapid breaker |
| CN204732355U (en) * | 2015-04-02 | 2015-10-28 | 南方电网科学研究院有限责任公司 | The hybrid DC circuit breaker of a kind of nature commutation type |
| CN207010216U (en) * | 2017-04-14 | 2018-02-13 | 贵州电网有限责任公司 | A kind of low-voltage direct breaker |
Non-Patent Citations (2)
| Title |
|---|
| 吕纲: "10kV自然换流型混合式直流断路器中真空电弧电流转移特性研究", 《中国电机工程学报》 * |
| 朱童: "全固态直流断路器在低压直流配电系统中的应用", 《南方电网技术》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN107565520A (en) * | 2017-08-22 | 2018-01-09 | 全球能源互联网研究院 | A kind of dc circuit breaker principal and subordinate cooperative control method and control system |
| CN107565520B (en) * | 2017-08-22 | 2019-04-30 | 全球能源互联网研究院 | A kind of dc circuit breaker principal and subordinate cooperative control method and control system |
| CN109119981A (en) * | 2018-09-29 | 2019-01-01 | 南京南瑞继保电气有限公司 | A kind of DC Line Fault current-limiting apparatus and system and its Current limited Control method |
| CN109119981B (en) * | 2018-09-29 | 2020-10-16 | 南京南瑞继保电气有限公司 | Direct-current fault current limiting device and system and current limiting control method thereof |
| CN109600032A (en) * | 2018-11-28 | 2019-04-09 | 广东电网有限责任公司电力科学研究院 | A kind of snubber circuit for solid-state switch |
| CN109586264A (en) * | 2018-12-14 | 2019-04-05 | 华北电力大学 | A kind of high voltage DC breaker semiconductor component protection circuit |
| CN112865061A (en) * | 2021-01-07 | 2021-05-28 | 天津大学 | Direct current load switch based on power electronic device and switching method thereof |
| WO2023035440A1 (en) * | 2021-09-09 | 2023-03-16 | 株洲福德轨道交通研究院有限公司 | Low-voltage hybrid direct-current circuit breaker |
| CN114050073A (en) * | 2021-11-09 | 2022-02-15 | 许昌许继软件技术有限公司 | Direct current switch device and control method thereof |
| CN117134602A (en) * | 2023-07-18 | 2023-11-28 | 国网天津市电力公司 | IGBT module parallel circuit with overvoltage suppression and current sharing performance and control method |
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Application publication date: 20170620 |