CN206759039U - A kind of direct current on-off device based on LC in parallel - Google Patents
A kind of direct current on-off device based on LC in parallel Download PDFInfo
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- CN206759039U CN206759039U CN201720443102.XU CN201720443102U CN206759039U CN 206759039 U CN206759039 U CN 206759039U CN 201720443102 U CN201720443102 U CN 201720443102U CN 206759039 U CN206759039 U CN 206759039U
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Abstract
It the utility model is related to a kind of direct current on-off device based on LC in parallel, including capacitor C, reactor L, controllable silicon SCR, high-speed eddy switch K0 and zinc oxide FR；The end of incoming cables of the high-speed eddy switch K0 is connected with power distribution cabinet end of incoming cables, and high-speed eddy switch K0 leading-out terminal is connected with power distribution cabinet leading-out terminal；The zinc oxide FR is connected in parallel on high-speed eddy switch K0 both ends；The end of incoming cables of the capacitor C is connected with high-speed eddy switch K0 end of incoming cables, capacitor C leading-out terminal is connected with the end of incoming cables of controllable silicon SCR, the leading-out terminal of the controllable silicon SCR is connected with reactor L end of incoming cables, and the leading-out terminal of the reactor L is connected with high-speed eddy switch K0 leading-out terminal.The utility model has the advantages that simple in construction, connecting-disconnecting function is strong, safe and reliable, can effectively cut-off various over current faults in DC line, reduces impact of the short circuit current to electrical equipment in power system, avoids the further expansion of line fault.
Description
Technical field
It the utility model is related to direct current transmission of electricity and cut-off technical field, especially a kind of direct current based on LC in parallel cut-offs dress
Put.
Background technology
Dc circuit breaker is equipment very important and essential in direct current field device.China's dc circuit breaker, it is long
Phase relies on import, and external producer is even more to carry out technology blockage to its key technology, limits China's dc circuit breaker R ＆ D Level
Development.The test capability deficiency of domestic dc circuit breaker, which also turns into, influences an important factor for it is developed.Due to dc circuit breaker
Fail to domesticize, its high purchase cost, constrain the ability that China's DC fields system integration is domesticized.
Independent research of the construction of dc circuit breaker test capability to dc circuit breaker has important directive significance, experiment
Ability should be able to equivalent the type dc circuit breaker actual motion condition, and can quick release of energy, shaken including LC low frequencies
Movable property gives birth to direct current breaking current.After dc circuit breaker fracture disjunction, the energy stored in inductance is to the electric capacity in dc circuit breaker
Device charges, and causes the voltage on capacitor to rise rapidly, so as to produce restoring over-voltage at fracture both ends；After current segmenting, examination
Testing in loop to let out can protect branch road to vibrate the dump energy in quick consumption test loop by LC.Due in whole test loop
In, it is necessary to repeatedly use the inductance of different L values, the segmentation inductance in dc circuit breaker electric current disjunction experimental loop, can influence whole
The design of individual test loop, and test value and the identical of actual value are had an impact.Therefore, the inductance of reasonable Arrangement difference L values
Experimentation cost can be reduced and improve test reliability.
The dc circuit breaker that existing market DC line uses, there is volume it is larger, involve great expense, connecting-disconnecting function compared with
It is small, the needs of power system can not be met, the operation of power system certain hidden danger is present.
Utility model content
The purpose of this utility model is to provide one kind when DC power transmission line outlet failure, can effectively cut-off direct current
Various over current faults in circuit, reduce impact of the short circuit current to electrical equipment in power system, avoid line fault further
The direct current on-off device based on LC in parallel expanded.
To achieve the above object, the utility model employs following technical scheme：A kind of direct current based on LC in parallel cut-offs
Device, including capacitor C, reactor L, controllable silicon SCR, the high speed for cutting off short trouble for forming LC series connection concussions
Vortex switch K0, and for turning off the zinc oxide FR of LC series connection concussions；The end of incoming cables of the high-speed eddy switch K0 and distribution
Cabinet end of incoming cables is connected, and high-speed eddy switch K0 leading-out terminal is connected with power distribution cabinet leading-out terminal；The zinc oxide FR is connected in parallel on
High-speed eddy switchs K0 both ends；The end of incoming cables of the capacitor C is connected with high-speed eddy switch K0 end of incoming cables, capacitor
C leading-out terminal is connected with the end of incoming cables of controllable silicon SCR, and the leading-out terminal of the controllable silicon SCR is connected with reactor L end of incoming cables
Connect, the leading-out terminal of the reactor L is connected with high-speed eddy switch K0 leading-out terminal.
The end of incoming cables of the zinc oxide FR and high-speed eddy switch K0 end of incoming cables are connected, zinc oxide FR leading-out terminal with
High-speed eddy switch K0 leading-out terminal is connected.
The controllable silicon SCR controls it to cut-off by the controller in power distribution cabinet.
The high-speed eddy switch K0 is vacuum extinction breaker, and the high-speed eddy switch K0 passes through installed in power distribution cabinet
In controller control it to cut-off.
As shown from the above technical solution, the utility model has the advantages that simple in construction, connecting-disconnecting function is strong, safe and reliable,
Various over current faults in DC line can be effectively cut-off, reduces impact of the short circuit current to electrical equipment in power system, avoids
The further expansion of line fault.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
As shown in figure 1, a kind of direct current on-off device based on LC in parallel, including capacitor C, reactor L, for forming LC
Connect the controllable silicon SCR shaken, the high-speed eddy switch K0 for cutting off short trouble, and for turning off LC series connection concussions
Zinc oxide FR；The end of incoming cables of the high-speed eddy switch K0 is connected with power distribution cabinet end of incoming cables, and high-speed eddy switchs K0 outlet
End is connected with power distribution cabinet leading-out terminal；The zinc oxide FR is connected in parallel on high-speed eddy switch K0 both ends；The capacitor C's enters
Line end is connected with high-speed eddy switch K0 end of incoming cables, and capacitor C leading-out terminal is connected with the end of incoming cables of controllable silicon SCR,
The leading-out terminal of the controllable silicon SCR is connected with reactor L end of incoming cables, and the leading-out terminal of the reactor L is opened with high-speed eddy
The leading-out terminal for closing K0 is connected.
As shown in figure 1, the end of incoming cables of the zinc oxide FR is connected with high-speed eddy switch K0 end of incoming cables, zinc oxide FR
Leading-out terminal and high-speed eddy switch K0 leading-out terminal be connected.The controllable silicon SCR passes through the control in power distribution cabinet
Device controls it to cut-off.High-speed eddy switch K0 be vacuum extinction breaker, the high-speed eddy switch K0 by installed in
Controller in power distribution cabinet controls it to cut-off.
Operation principle of the present utility model is as follows：Controller is immediately when DC power transmission line outlet failure, in power distribution cabinet
Separating brake order is sent to high-speed eddy switch K0, sends turn-on command to controllable silicon SCR；After controllable silicon SCR turns on, in device
Capacitor C, reactor L, high-speed eddy switch K0 form series resonance discharge loop immediately, flow through change in the loop
Alternating current, high-speed eddy switch K0 complete shut-off in alternating current zero crossing；After high-speed eddy switch K0 disconnects, distribution
Controller sends shut-off instruction to controllable silicon SCR immediately in cabinet, and now electric current flows through capacitor C loops in circuit, as capacitor C
When both end voltage rises to zinc oxide FR conducting voltages, zinc oxide FR is turned on immediately, and now electric current flows through zinc oxide FR times in circuit
Road, shut-off is now completed during controllable silicon SCR current zero-crossing point；After controllable silicon SCR turns off, zinc oxide FR is also immediately turned off, complete
Various over current faults are cut-off into DC power transmission line.
In summary, the utility model has the advantages that simple in construction, connecting-disconnecting function is strong, safe and reliable, can effectively cut-off
Various over current faults in DC line, reduce impact of the short circuit current to electrical equipment in power system, avoid line fault
Further expand.
Claims (4)
- A kind of 1. direct current on-off device based on LC in parallel, it is characterised in that：Including capacitor C, reactor L, for forming LC Connect the controllable silicon SCR shaken, the high-speed eddy switch K0 for cutting off short trouble, and for turning off LC series connection concussions Zinc oxide FR；The end of incoming cables of the high-speed eddy switch K0 is connected with power distribution cabinet end of incoming cables, and high-speed eddy switchs K0 outlet End is connected with power distribution cabinet leading-out terminal；The zinc oxide FR is connected in parallel on high-speed eddy switch K0 both ends；The capacitor C's enters Line end is connected with high-speed eddy switch K0 end of incoming cables, and capacitor C leading-out terminal is connected with the end of incoming cables of controllable silicon SCR, The leading-out terminal of the controllable silicon SCR is connected with reactor L end of incoming cables, and the leading-out terminal of the reactor L is opened with high-speed eddy The leading-out terminal for closing K0 is connected.
- 2. the direct current on-off device according to claim 1 based on LC in parallel, it is characterised in that：The zinc oxide FR's enters Line end is connected with high-speed eddy switch K0 end of incoming cables, the leading-out terminal phase of zinc oxide FR leading-out terminal and high-speed eddy switch K0 Connection.
- 3. the direct current on-off device according to claim 1 based on LC in parallel, it is characterised in that：The controllable silicon SCR is led to The controller crossed in power distribution cabinet controls it to cut-off.
- 4. the direct current on-off device according to claim 1 based on LC in parallel, it is characterised in that：The high-speed eddy switch K0 is vacuum extinction breaker, and the high-speed eddy switch K0 controls it to cut-off by the controller in power distribution cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720443102.XU CN206759039U (en) | 2017-04-25 | 2017-04-25 | A kind of direct current on-off device based on LC in parallel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720443102.XU CN206759039U (en) | 2017-04-25 | 2017-04-25 | A kind of direct current on-off device based on LC in parallel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206759039U true CN206759039U (en) | 2017-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720443102.XU Active CN206759039U (en) | 2017-04-25 | 2017-04-25 | A kind of direct current on-off device based on LC in parallel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106921148A (en) * | 2017-04-25 | 2017-07-04 | 安徽伊格瑞德电气设备有限公司 | A kind of direct current on-off device based on LC in parallel |
| CN108365601A (en) * | 2018-05-09 | 2018-08-03 | 安徽徽电科技股份有限公司 | One kind being based on artificial zero passage direct current rapid on-off apparatus |
-
2017
- 2017-04-25 CN CN201720443102.XU patent/CN206759039U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106921148A (en) * | 2017-04-25 | 2017-07-04 | 安徽伊格瑞德电气设备有限公司 | A kind of direct current on-off device based on LC in parallel |
| CN108365601A (en) * | 2018-05-09 | 2018-08-03 | 安徽徽电科技股份有限公司 | One kind being based on artificial zero passage direct current rapid on-off apparatus |
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