CN207010215U - A kind of high voltage DC breaker - Google Patents
A kind of high voltage DC breaker Download PDFInfo
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- CN207010215U CN207010215U CN201720392506.0U CN201720392506U CN207010215U CN 207010215 U CN207010215 U CN 207010215U CN 201720392506 U CN201720392506 U CN 201720392506U CN 207010215 U CN207010215 U CN 207010215U
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Abstract
The utility model discloses a kind of high voltage DC breaker, is made up of four parallel branch both 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；3rd branch road is the buffer loop being composed in series by resistance and electric capacity；4th branch road is the energy absorption loop that is made up of Zinc-Oxide Arrester, the utility model can realize it is two-way rapidly switch off, it is and simple in construction, it is easy to make, it is practical.
Description
Technical field
A kind of dc circuit breaker is the utility model is related to, especially a kind of high voltage DC breaker, belongs to power technology neck
Domain.
Background technology
With the continuous development of economy, because fossil energy is exhausted and exploitation difficulty increase, while serious ring is caused
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, there are 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, have line loss is low, transmission capacity is big, long transmission distance,
The advantages that quality of power supply height and sex chromosome mosaicism stable in the absence of system synchronization, turn into the development trend of 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.
Utility model content
The purpose of this utility model is：For the power system development trend of development direct-current micro-grid at present, there is provided Yi Zhongzhi
Breaker scheme is flowed, the dc circuit breaker includes current-limiting circuit and connected in series four parallel branches.Current-limiting circuit is by current limliting
Inductance is formed；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 is solid-state switch, for turning off bi-directional failure electric current；3rd branch road is buffer loop, in series by resistance, electric capacity；The
Four branch roads are absorption circuit, are made up of Zinc-Oxide Arrester, for buffering and line inductance energy when absorption is cut-off, reduce solid-state
Switching voltage climbing and solid switch device is protected not threatened by overvoltage.The dc circuit breaker can realize two-way rapidly switch off.
The technical solution of the utility model is：A kind of high voltage DC breaker, including the first current-limiting reactor, the second current limliting
Reactor and electric branch circuit, the first described current-limiting reactor, electric branch circuit and the second current-limiting reactor form series line successively
Road.
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.
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 electric capacity are composed in series.
The 4th described branch road is the energy absorption loop that Zinc-Oxide Arrester is formed.
Described auxiliary switch is by two IGBT differential concatenations, and the anti-parallel diodes on each IGBT.
By adopting the above-described technical solution, compared with prior art, IGBT module is by two electric power in the utility model
Electronic component IGBT differential concatenations, and the anti-parallel diodes on each IGBT, it can realize that electric current is two-way and rapidly switch off.The
One branch road and the second branch circuit parallel connection, flow through load current when normal by tie point, need what is be switched on or off in switch
When, disconnected in tie point using the second branch road and being acted on shunting, pincers pressure in closing course, realize that tie point disconnects rapidly
And closure, can be achieved it is two-way rapidly switch off, and be lost it is low.Line inductance energy when snubber loop is cut-off for snubber
Amount, 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.The utility model is simple in construction, making side
Just, it is practical.
Brief description of the drawings
Accompanying drawing 1 is the schematic diagram that the utility model is used in direct-current micro-grid；
Accompanying drawing 2 is the utility model structure diagram；
It is identified as in figure：1st, the first current-limiting reactor, the 2, second current-limiting reactor, 3, quick isolation switch, 4, auxiliary opens
Close, 5, IGBT, 6, diode, 7, solid-state switch, 8, IGBT, 9, diode, 10, resistance, 11, electric capacity, 12, zinc oxide takes shelter from the thunder
Device.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings, but not as to of the present utility model any
Limitation.
As shown in Figure 1, embodiment of the present utility model：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 11, Zinc-Oxide Arrester 12 form, the first described current-limiting reactor（1）, electric branch circuit and the second current-limiting reactor（2）
Series circuit is formed 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 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 formed.
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 present utility model, by four parallel branch both ends series connection, two current-limiting reactor groups
Into 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 leading
Logical normal load electric current；Second branch road is transfer branch road, is made up of solid-state switch, the solid-state switch is by several IGBT module strings
Connection composition, each IGBT module is by two IGBT differential concatenations, and the anti-parallel diodes on each IGBT, IGBT module are individual
It 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；The
Three branch roads are the buffer loops being composed in series by resistance and electric capacity, line inductance energy when being cut-off for buffering, and reduce solid-state and open
Close voltage build-up rate；4th branch road is the energy absorption loop being made up of Zinc-Oxide Arrester, line electricity when being cut-off for absorbing
Inductance energy, solid switch device is protected not receive voltage threat.The utility model can realize it is two-way rapidly switch off, and structure letter
It is single, it is easy to make, 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, some DC loads can be directly connected to low-voltage direct bus by dc circuit breaker
On.Low-voltage direct busbar voltage is boosted by commutator transformer, is connected to by dc circuit breaker on middle pressure dc bus.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.Middle pressure dc bus passes through DC/AC transverters again, passes through 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 do not embody its reactance characteristic in straight-flow system, thus the access of reactance to straight-flow system just
Often operation and can play obvious metering function without influence during failure, can reduce direct-current short circuit current-rising-rate, so as to reduce pair
The requirement of mechanical switch quick-action, the both 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 are composed in series by several IGBT modules, and IGBT module number is true according to used DC voltage level
Fixed, each IGBT module is by two IGBT differential concatenations, and the anti-parallel diodes on each IGBT, the branch road are used for open-minded
Normal operating current and shut-off bi-directional failure electric current；3rd branch road is the buffer loop being composed in series by resistance and electric capacity, is used for
Line inductance energy when buffering is cut-off, reduce 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 the technical solution of the utility model, required equipment and component are attached, you can tested, tried
Tested by the following method when testing：
Closing operation：The solid-state switch T for first triggering the second branch road is turned it on, and then close tie point it is quick every
Leave and close K, then turn on auxiliary switch T0, it is turned under no-voltage, the second branch road is turned off after confirming tie point conducting
Solid-state switch makes its out of service.After the solid-state switch T closures of second branch road in the presence of current-limiting inductance, DC current is gradual
Steady-state value is raised to from above freezing, that is, current-limiting inductance has the function that to suppress DC current climbing in combined floodgate initial stage, quite
In serving cushioning effect to making process.After making process terminates, dc source powering to the load through tie point, current limliting
Inductance only has leveling to DC ripple, therefore device on-state voltage drop is with being lost equal very little.
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 short circuit current at initial stage climbing.
When receiving separating brake order or detecting that short circuit current exceedes action setting value, send immediately touch logical second branch road solid-state switch and
Turn off tie point auxiliary switch signal.Overvoltage caused by the shut-off of tie point auxiliary switch 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, no arc disconnects tie point and quickly isolated out
Close；Cut-off signals are sent then to the second branch road solid-state switch T, its all IGBT valve group rapidly switches 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 undertaken is in the range of its safety operation area.
Claims (2)
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 formed successively,
Described electric branch circuit includes tie point, the second branch road, the 3rd branch road and the 4th branch road, described tie point, second
Road, the 3rd branch road and the 4th branch road are parallel connection, and described tie point is by quick isolation switch（3）And auxiliary switch（4）Series connection,
Second described at least one solid-state switch of route（7）It is composed in series；Each solid-state switch（7）By two IGBT（8）Reversely
Series connection, and in each IGBT（8）Upper anti-parallel diodes（9）, described the 3rd routing resistance（10）And electric capacity（11）String
Connection composition, the 4th described branch road is Zinc-Oxide Arrester（12）The energy absorption loop of composition.
A kind of 2. high voltage DC breaker according to claim 1, 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）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720392506.0U CN207010215U (en) | 2017-04-14 | 2017-04-14 | A kind of high voltage DC breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720392506.0U CN207010215U (en) | 2017-04-14 | 2017-04-14 | A kind of high voltage DC breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207010215U true CN207010215U (en) | 2018-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720392506.0U Active CN207010215U (en) | 2017-04-14 | 2017-04-14 | A kind of high voltage DC breaker |
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Cited By (2)
| 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 |
| 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 |
-
2017
- 2017-04-14 CN CN201720392506.0U patent/CN207010215U/en active Active
Cited By (3)
| 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 |
| 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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