CN207612044U - Inhibit the mixed DC breaker of the starting the arc using capacitance - Google Patents
Inhibit the mixed DC breaker of the starting the arc using capacitance Download PDFInfo
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- CN207612044U CN207612044U CN201721692455.XU CN201721692455U CN207612044U CN 207612044 U CN207612044 U CN 207612044U CN 201721692455 U CN201721692455 U CN 201721692455U CN 207612044 U CN207612044 U CN 207612044U
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Abstract
The utility model provides a kind of mixed DC breaker inhibiting the starting the arc using capacitance, belongs to dc circuit breaker field, solves that existing mixed DC breaker is of high cost, functional reliability is low, takes up a large area, the problems such as capacity loss is big.Including current-limiting inductance Ls, main branch, diverter branch and energy consumption branch；Main branch includes switch K1, switch K2, capacitance C2 and resistance R2；Diverter branch includes all-controlling power electronics device module T2；The branch that consumes energy includes arrester MOV：One end of Ls and the mains side anode A connections of direct current power system, the other end of Ls and one end of K1 connect, and the other end of K1 and one end of K2 connect, the load anode B connections of the other end and direct current power system of K2；C2 is in parallel with K2, and R2 is in parallel with C2；The collector of T2 is connect with one end of switch K1, the load anode B connections of the emitter and direct current power system of T2；One end of MOV and one end of K1 connect, the load anode B connections of the other end and direct current power system of MOV.
Description
Technical field
The utility model is related to dc circuit breaker technical field more particularly to a kind of mixing using the capacitance inhibition starting the arc are straight
Flow breaker.
Background technology
Direct current transmission and distribution system is the trend of Future Power System development, is had to the construction and development of China's future power grid
Important meaning.One of key technology in direct current transmission and distribution system is the research and development of dc circuit breaker, and direct current is not easy breath arc, always
The development of dc circuit breaker is hampered, and then limits the development of direct current transmission and distribution.Dc circuit breaker is broadly divided into three types：
Mechanical dc circuit breaker based on Fast mechanical switch, all solid state dc circuit breaker based on power electronic devices and whole
Close the hybrid dc circuit breaker of the above two advantages.
In November, 2012 ABB AB develop based on insulated gate bipolar transistor (IGBT) valve group serial connection technology with quickly
The connecting-disconnecting function of mechanical switch is the hybrid dc circuit breakers of 320KV/2.6KA of 9KA, switch off time 5ms, main branch therein
Assist exchanging circuit is needed to switch, and assist exchanging circuit switch is made of power electronic devices.And power electronic devices is of high cost, operation damage
Consumption is big, needs to be equipped with complicated cooling system, reduces the functional reliability of hybrid dc circuit breaker.Publication No.
The patent application of CN106024455A discloses a kind of no arc mixed DC breaker and its realizes the method that non-arc breaking closes a floodgate, such as
Shown in Fig. 1, which relies primarily on the effect of the capacitance C1 and C2 at the both ends mechanical switch K1, realizes open mechanical switch
Being disconnected without arc when K1.But power supply survey RLC second-order systems easily vibrate, and lead to straight-flow system spread of voltage.Direct current
Capacitance C1 is directly parallel in both ends of power after killer switch disconnects, and causes the voltage that capacitance C1 is born bigger, and high-voltage electricity
That holds takes up a large area.It is disconnected that the patent application of Publication No. CN 106099878A discloses a kind of capacitor charging type bidirectional, dc
Road device, as shown in Fig. 2, the dc circuit breaker relies primarily on capacitor charging to shunt main branch electric current, to pressure-resistant, the resistance to electricity of capacitance
Stream has very high requirement, and the more control of the switch used is complicated；Main branch also needs to force the power electronics of circulation auxiliary
It is one of its problem to help switch, running wastage；The arc time of mechanical switch fully relies on the charging time of capacitance, time mistake
It is long；Charging capacitor overvoltage phenomenon may occur in charging；Switch 9 is directly disconnected when electric current is also very big equally can the starting the arc；
Entirety is come to switching, capacity loss is all larger, seriously affects shelf life.
Invention content
The purpose of this utility model is that the existing mixed DC breaker of solution is of high cost, running wastage is big, reliable operation
Property is low, is easy to cause straight-flow system spread of voltage, takes up a large area, the technology that capacity loss is larger and service life is short is asked
Topic provides a kind of mixed DC breaker inhibiting the starting the arc using capacitance.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
It is a kind of using capacitance inhibit the starting the arc mixed DC breaker, including current-limiting inductance Ls, main branch, diverter branch and
Consume energy branch；Main branch includes switch K1, switch K2, capacitance C2 and resistance R2；Diverter branch includes full-control type power electronic device
Part module T2；The branch that consumes energy includes arrester MOV, wherein：The power supply of one end and direct current power system of the current-limiting inductance Ls
Side anode A connections, the other end of current-limiting inductance Ls are connect with one end of switch K1, one end of the other end and switch K2 of switch K1
Connection, the load anode B connections of the other end and direct current power system of switch K2；Capacitance C2 is in parallel with switch K2, resistance R2
It is in parallel with capacitance C2；The collector of all-controlling power electronics device module T2 is connect with one end of switch K1, full-control type electric power electricity
The load anode B connections of the emitter and direct current power system of sub- device blocks T2；One end of arrester MOV and the one of switch K1
End connection, the load anode B connections of the other end and direct current power system of arrester MOV.
Optionally, the main branch further includes switch K3, capacitance C3 and resistance R3, and switch K3 is set to switch K2 and direct current
Between the load anode B of electric system, capacitance C3 and resistance R3 are in parallel with switch K3.
Optionally, the diverter branch further includes all-controlling power electronics device module T1, all-controlling power electronics device
Module T1 and all-controlling power electronics device module T2 reverse parallel connections.
Optionally, the capacitance C2 is formed in parallel by multiple capacitances.
Optionally, the diverter branch further includes at least one full-control type or half control type power electronic device module T3, until
A few full-control type or half control type power electronic device module T3 connect with all-controlling power electronics device module T2.
Optionally, the diverter branch further includes all-controlling power electronics device module T4, all-controlling power electronics device
Module T4 is in parallel with all-controlling power electronics device module T2.
Optionally, the energy consumption branch further includes at least one arrester MOV1, at least one arrester MOV1 with it is lightning-arrest
Device MOV serial or parallel connections.
Optionally, the all-controlling power electronics device module T2 is IGBT.
Optionally, the half control type power electronic device module in the full-control type or half control type power electronic device module T3
For SCR.
The utility model has the beneficial effects that：
Switch K2 is inhibited to cut-off the starting the arc of moment by the way that the parallel combination of capacitance C2 and switch K2 is arranged, it is mixed instead of tradition
The mode for serving as assist exchanging circuit switch in box-like dc circuit breaker using power electronic devices, not only greatly reduces running wastage
With dc circuit breaker cost, the functional reliability of dc circuit breaker is also added.Since capacitance C2 is not directly in parallel with power supply,
Thus capacitance C2 can reduce the volume and cost of dc circuit breaker without too high voltages are subjected to, and increase service life.Therefore, with
Background technology is compared, and the utility model has the running wastage that can lower dc circuit breaker and cost, improves functional reliability, subtracts
Small size is suitable for low pressure high-voltage direct current, increases the advantages that service life.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of no arc mixed DC breaker disclosed in CN 106024455A.
Fig. 2 is a kind of structural schematic diagram of capacitor charging type bidirectional, dc breaker disclosed in CN 106099878A.
Fig. 3 is the structural schematic diagram of the utility model embodiment 1.
Fig. 4 is the structural schematic diagram of the utility model embodiment 2.
Fig. 5 is the structural schematic diagram of the utility model embodiment 3.
Fig. 6 is the structural schematic diagram of the utility model embodiment 4.
Fig. 7 is the structural schematic diagram of the utility model embodiment 5.
Fig. 8 is the structural schematic diagram of the utility model embodiment 6.
Fig. 9 is the structural schematic diagram of the utility model embodiment 7.
Figure 10 is the structural schematic diagram of the utility model embodiment 8.
Figure 11 is the structural schematic diagram of the utility model embodiment 9.
Figure 12 is the structural schematic diagram of the utility model embodiment 10.
Figure 13 is the structural schematic diagram of the utility model embodiment 11.
Specific implementation mode
The utility model is described in further detail below in conjunction with drawings and examples.
Embodiment 1
As shown in figure 3, the mixed DC breaker for inhibiting the starting the arc using capacitance in the present embodiment, including current-limiting inductance
Ls, main branch, diverter branch and energy consumption branch；Main branch includes switch K1, switch K2, capacitance C2 and resistance R2；Diverter branch
Including IGBT T2；The branch that consumes energy includes arrester MOV, wherein：The electricity of one end and direct current power system of the current-limiting inductance Ls
The A connections of source anode, the other end of current-limiting inductance Ls are connect with one end of switch K1, the other end of switch K1 and the one of switch K2
End connection, the load anode B connections of the other end and direct current power system of switch K2；Capacitance C2 is in parallel with switch K2, resistance R2
It is in parallel with capacitance C2；The collector of IGBT T2 is connect with one end of switch K1, the emitter and direct current power system of IGBT T2
The B connections of load anode；One end of arrester MOV is connect with one end of switch K1, the other end and direct current power of arrester MOV
The load anode B connections of system.
Capacitance C2 plays key effect when inhibiting the starting the arc in the utility model, capacitance C2 winks during shunting
Between can bear very high dash current, although the duration is very short, still can affect to capacitance itself, be
The shelf life for ensureing capacitance, multiple capacitances may be used and compose in parallel capacitance C2 to share dash current.So optionally,
Capacitance C2 is formed in parallel by multiple capacitances.Capacitance C2 selects multiple parallel connections, can reduce the dash current that each capacitance is born,
And can meet the needs of different voltages, current class.The quantity of specific capacitance can be according to the voltage electricity of DC transmission system
Situation is flowed to determine.Wherein IGBT T2 can also be replaced using IGCT.
Wherein, in Fig. 3 and follow-up each figure, DC power supply DC and resistance Rs are respectively the power unit in DC power transmission line
Equivalent source and equivalent resistance.Inductance L and resistance RL be respectively DC power transmission line in loading section equivalent inductance and
Equivalent resistance.
The utility model realizes that the method for inhibiting the starting the arc is：(1) there are arc control, i.e. switch K1 and switch K2 linkages：Normally
Under working condition, switch K1 and switch K2 are kept closed, and capacitance C2 is in short-circuit condition, and both end voltage is substantially zeroed；When
When short circuit occurs for DC power transmission line, the IGBT T2 in diverter branch first perceive the short-circuit signal, and switch K1 and switch K2 are same
When trip, however due to the starting the arc of switch K1 at this time, charge can pass through from switch K1, from switch K1 by charge can make capacitance
The voltage at the both ends C2, which is started from scratch, to be gradually increasing, when what the voltage at the both ends capacitance C2 reached IGBT T2 in diverter branch opens pressure
When drop, diverter branch starts to shunt, and electric current mainly circulates from diverter branch at this time.Divided delay-action is determined by the charging time of capacitance C2
It is fixed.After the divided delay-action for approximately passing through 1ms, diverter branch shunting is completed, and turns off diverter branch, and energy consumption branch absorbs direct current transportation
The energy and inhibition disjunction voltage, entire turn off process of current-limiting inductance Ls storages in system are completed.Therefore, reaching switch K2
Play arc condition before, the shunting of main branch is shunted by diverter branch and is completed, thus capacitance C2 can inhibit switch K2 moments
The starting the arc.It should be noted that when the capacitance of capacitance C2 is too small, switch K2 can be due in capacitance C2 both end voltages when disconnecting
Liter is too fast, equally causes the starting the arc, and in order to avoid this kind happens, capacitance C2 chooses the bigger capacitance of capacitance.(2) nothing
Arc disconnects：When short circuit occurs for DC power transmission line, switch K2 is first disconnected, disconnects switch again after diverter branch shunts
K1 is realized and is disconnected without arc.Such case needs the capacitance C2 both end voltages rate of climb in the condition for meeting the not starting the arc, in order to protect
For the sake of danger, capacitance C2 chooses the bigger capacitance of capacitance, as the capacitance of capacitance C2 is more than 1500uF.
The utility model realizes that the method closed a floodgate without arc is：After the fault of DC transmission system is removed, electricity is utilized
Hold inhibit the starting the arc mixed DC breaker receive reclosing signal after, the IGBT T2 in diverter branch are first connected, protect
It is the pressure drop of IGBT T2 to demonstrate,prove switch K1 and switch K2 both end voltages when closing a floodgate, and switch K1 and switch K2 receive signal closure
Afterwards, diverter branch is automatically shut down.
In the utility model, current-limiting inductance Ls can be with the climbing speed of fault current limiting.Main branch is dc circuit breaker
Direct current when normally flows through branch, and switch K1 and switch K2 are mechanical switch, and the effect of capacitance C2 is that switch K2 is inhibited to rise
Arc, the effect of resistance R2 are to consume capacitance C2 after inhibiting the mixed DC breaker of the starting the arc to complete disconnection action using capacitance
In stored electric energy, play the role of discharging capacitive electric energy, it is ensured that in reclosing, capacitance C2 both end voltages are unlikely to cause
The combined floodgate starting the arc.
Wherein, when switch K1 and switch K2 linkages, the mixed DC breaker using the capacitance inhibition starting the arc can be reduced
Control difficulty, and improve its reliability.Even if the main switch of two linkages of switch K1 and switch K2 has a little on actuation time
Deviation is not in switching overvoltage phenomenon due to the protective effect of diverter branch and energy consumption branch.
Embodiment 2
As shown in figure 4, the mixed DC breaker for being inhibited the starting the arc using capacitance in the present embodiment, the main branch are also wrapped
Switch K3, capacitance C3 and resistance R3 are included, switch K3 is set between switch K2 and the load anode B of direct current power system, capacitance
C3 and resistance R3 are in parallel with switch K3.Remaining structure is identical as in embodiment 1.
The mixed DC breaker of the starting the arc is inhibited to be suitable for easy starting the arc environment using capacitance in the embodiment.In the easy starting the arc
Environment increases the parallel combination of a switch, capacitance and resistance to press down to further decrease switch ends voltage using main branch
The starting the arc processed.
Embodiment 3
As shown in figure 5, the mixed DC breaker for inhibiting the starting the arc using capacitance in the present embodiment, the diverter branch is also
Including IGBT T1, IGBT T1 and IGBT T2 reverse parallel connections, i.e. the emitter of IGBT T1 is connect with one end of switch K1, IGBT
The load anode B connections of the collector and direct current power system of T1.Remaining structure is identical as in embodiment 1.
Inhibit the mixed DC breaker of the starting the arc that two-way cut-off current may be implemented using capacitance in the embodiment, to
The error protection requirement of the DC transmission system of multiterminal power supply can be met.
Embodiment 4
As shown in fig. 6, the mixed DC breaker for inhibiting the starting the arc using capacitance in the present embodiment, the diverter branch is also
Including IGBT T1, IGBT T1 and IGBT T2 reverse parallel connections, i.e. the emitter of IGBT T1 is connect with one end of switch K1, IGBT
The load anode B connections of the collector and direct current power system of T1.Remaining structure is identical as in embodiment 2.
The mixed DC breaker of the starting the arc is inhibited to be suitable for easy starting the arc environment using capacitance in the embodiment, and can be with
It realizes two-way cut-off current, is required so as to meet the error protection of DC transmission system of multiterminal power supply.
Embodiment 5
As shown in fig. 7, the mixed DC breaker for inhibiting the starting the arc using capacitance in the present embodiment, the diverter branch is also
It connects with IGBT T2 including SCR T3, SCR a T3.Remaining structure is identical as in embodiment 1.
Wherein, SCR T3 can also be replaced using IGBT.In the present embodiment, diverter branch can be by full-control type electric power electricity
Sub- device blocks are composed, or are composed of full-control type and half control type power electronic device module.Full-control type and half control
The quantity of type power electronic device module can determine according to factors such as voltage class, the transfer current sizes of DC power transmission line
It is fixed.
Embodiment 6
As shown in figure 8, the mixed DC breaker for inhibiting the starting the arc using capacitance in the present embodiment, the diverter branch is also
It connects with all-controlling power electronics device module T2 including SCR T3, SCR a T3.Remaining structure and the phase in embodiment 2
Together.SCR T3 can also be replaced using IGBT.
Embodiment 7
As shown in figure 9, the mixed DC breaker for inhibiting the starting the arc using capacitance in the present embodiment, the diverter branch is also
Including IGBT T4, IGBT T4 are in parallel with IGBT T2.Remaining structure is identical as in embodiment 1.Wherein, the pressure resistance of IGBT T4
Grade is identical as the stress levels of IGBT T2.
Embodiment 8
As shown in Figure 10, the mixed DC breaker for inhibiting the starting the arc using capacitance in the present embodiment, the diverter branch
Further include IGBT T4, IGBT T4 are in parallel with IGBT T2.Remaining structure is identical as in embodiment 2.Wherein, IGBT T4's is resistance to
Press grade identical as the stress levels of IGBT T2.
Embodiment 9
As shown in figure 11, the mixed DC breaker for inhibiting the starting the arc using capacitance in the present embodiment, the diverter branch
Further include that IGBT T4 and two SCR T3 and SCR T5, SCR T3 connect with IGBT T2, after SCR T5 connect with IGBT T4,
The branch circuit parallel connection constituted with IGBT T2 and SCRT3.Remaining structure is identical as in embodiment 1.Wherein, IGBT T2 and SCR T3
The branch of composition is identical as the stress levels of branch that IGBT T4 and SCR T5 are constituted.
Embodiment 10
As shown in figure 12, the mixed DC breaker for inhibiting the starting the arc using capacitance in the present embodiment, the energy consumption branch
Further include an arrester MOV1, arrester MOV1 connects with arrester MOV.Remaining structure is identical as in embodiment 1.
Embodiment 11
As shown in figure 13, the mixed DC breaker for inhibiting the starting the arc using capacitance in the present embodiment, the energy consumption branch
Further include an arrester MOV1, arrester MOV1 is in parallel with arrester MOV.Remaining structure is identical as in embodiment 1.
In above-described embodiment 10 and embodiment 11, when diverter branch includes multiple arrester MOV1, by them and take shelter from the thunder
Device MOV serial or parallel connections.
Diverter branch in above-described embodiment includes all-controlling power electronics device module and at least one full-control type or half
When control type power electronic device blocks T3, full-control type or half control type power electronic device module T3 and all-controlling power electronics device
Module T2 series connection.
It is understood that embodiment of above is merely to illustrate that the principles of the present invention and uses exemplary
Embodiment, however the utility model is not limited thereto.For those skilled in the art, this is not being departed from
In the case of the spirit and essence of utility model, various changes and modifications can be made therein, these variations and modifications are also considered as this reality
With novel protection domain.
Claims (9)
1. it is a kind of using capacitance inhibit the starting the arc mixed DC breaker, which is characterized in that including current-limiting inductance Ls, main branch,
Diverter branch and energy consumption branch；Main branch includes switch K1, switch K2, capacitance C2 and resistance R2；Diverter branch includes full-control type
Power electronic device module T2；The branch that consumes energy includes arrester MOV, wherein：
One end of the current-limiting inductance Ls and the mains side anode A connections of direct current power system, the other end of current-limiting inductance Ls with
One end of switch K1 connects, and the other end of switch K1 is connect with one end of switch K2, the other end and the direct current power system of switch K2
The load anode B connections of system；Capacitance C2 is in parallel with switch K2, and resistance R2 is in parallel with capacitance C2；All-controlling power electronics device mould
The collector of block T2 is connect with one end of switch K1, the emitter and direct current power system of all-controlling power electronics device module T2
The B connections of load anode；One end of arrester MOV is connect with one end of switch K1, the other end and direct current power of arrester MOV
The load anode B connections of system.
2. the mixed DC breaker according to claim 1 for inhibiting the starting the arc using capacitance, which is characterized in that the main branch
Road further includes switch K3, capacitance C3 and resistance R3, switch K3 be set to switch K2 and direct current power system load anode B it
Between, capacitance C3 and resistance R3 are in parallel with switch K3.
3. the mixed DC breaker according to claim 1 or 2 for inhibiting the starting the arc using capacitance, which is characterized in that described
Diverter branch further includes all-controlling power electronics device module T1, all-controlling power electronics device module T1 and full-control type electric power electricity
Sub- device blocks T2 reverse parallel connections.
4. the mixed DC breaker according to claim 1 for inhibiting the starting the arc using capacitance, which is characterized in that the capacitance
C2 is formed in parallel by multiple capacitances.
5. the mixed DC breaker according to claim 1 or 2 for inhibiting the starting the arc using capacitance, which is characterized in that described
Diverter branch further includes at least one full-control type or half control type power electronic device module T3, at least one full-control type or half control type
Power electronic device module T3 connects with all-controlling power electronics device module T2.
6. the mixed DC breaker according to claim 1 or 2 for inhibiting the starting the arc using capacitance, which is characterized in that described
Diverter branch further includes all-controlling power electronics device module T4, all-controlling power electronics device module T4 and full-control type electric power electricity
Sub- device blocks T2 is in parallel.
7. the mixed DC breaker according to claim 1 for inhibiting the starting the arc using capacitance, which is characterized in that the energy consumption
Branch further includes at least one arrester MOV1, at least one arrester MOV1 and arrester MOV serial or parallel connections.
8. the mixed DC breaker according to claim 1 for inhibiting the starting the arc using capacitance, which is characterized in that the full control
Type power electronic device module T2 is IGBT.
9. the mixed DC breaker according to claim 5 for inhibiting the starting the arc using capacitance, which is characterized in that the full control
Half control type power electronic device module in type or half control type power electronic device module T3 is SCR.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721692455.XU CN207612044U (en) | 2017-12-07 | 2017-12-07 | Inhibit the mixed DC breaker of the starting the arc using capacitance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721692455.XU CN207612044U (en) | 2017-12-07 | 2017-12-07 | Inhibit the mixed DC breaker of the starting the arc using capacitance |
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| Publication Number | Publication Date |
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| CN207612044U true CN207612044U (en) | 2018-07-13 |
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| CN201721692455.XU Expired - Fee Related CN207612044U (en) | 2017-12-07 | 2017-12-07 | Inhibit the mixed DC breaker of the starting the arc using capacitance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861189A (en) * | 2019-04-12 | 2019-06-07 | 国网江苏省电力有限公司沭阳县供电分公司 | A kind of arc extinction type low-voltage direct breaker |
-
2017
- 2017-12-07 CN CN201721692455.XU patent/CN207612044U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861189A (en) * | 2019-04-12 | 2019-06-07 | 国网江苏省电力有限公司沭阳县供电分公司 | A kind of arc extinction type low-voltage direct breaker |
| CN109861189B (en) * | 2019-04-12 | 2024-02-20 | 国网江苏省电力有限公司沭阳县供电分公司 | Arc extinguishing type low-voltage direct current breaker |
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Granted publication date: 20180713 Termination date: 20211207 |