CN104160464A - Method for connecting a dc voltage network section by means of a dc voltage switch - Google Patents
Method for connecting a dc voltage network section by means of a dc voltage switch Download PDFInfo
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- CN104160464A CN104160464A CN201280071253.7A CN201280071253A CN104160464A CN 104160464 A CN104160464 A CN 104160464A CN 201280071253 A CN201280071253 A CN 201280071253A CN 104160464 A CN104160464 A CN 104160464A
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- switch
- power semiconductor
- current path
- submodule
- binding post
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
- H01H33/596—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle for interrupting dc
Abstract
The invention relates to a method for connecting a DC voltage network section by means of a DC voltage switch (1) having two connection terminals (2,3), which comprises an operating current path (4) with a mechanical switch (7) and a turn-off current path (9) bridging the mechanical switch (7) and in which power semiconductor switches (10) that can be switched on or off are arranged. The turn-off current path (9) has a greater electrical resistance than the bridged section of the operating current path (9). According to the invention, the mechanical switch (7) opens and a current flow via the turn-off current path (9) is blocked. The first connection terminal (2) is then connected to a DC voltage source and the second connection terminal (3) to the DC voltage network section. Finally, a controlled voltage is applied to the DC voltage network section by actuating the power semiconductor switch (10), and the mechanical switch (7) is subsequently closed.
Description
Technical field
The present invention relates to a kind of method for the direct current network segment being accessed by direct voltage switch.
Background technology
The carbon dioxide emission reduction of the energy requirement that world wide increases and expectation simultaneously makes so-called regenerative resource day by day attractive.Rechargeable energy source is for example the wind power plant built of seashore or at the photovoltaic power generation equipment of the desert area of illumination abundance.In order to utilize economically the energy of such generation, rechargeable energy source is more and more important with being connected of continent power supply network.Based on this background, structure and the operation of the direct current network of networking are discussed more and more.Yet precondition is for this reason that the short circuit current that may occur in the direct current network of such networking can be disconnected fast and reliably.Yet need up to now on market also unavailable direct voltage switch for this reason.The known different concepts for such direct voltage switch from prior art.
In DE69408811T2, described a kind of direct voltage switch, wherein two mechanical switchs are connected in series.The series circuit being formed by two mechanical switchs is protected in case high overvoltage by discharger and capacitor.Can connect can switch-off power semiconductor switch only in parallel with a mechanical switch.When disconnecting, mechanical switch produces electric arc.The voltage triggered power semiconductor switch landing on electric arc, the mechanical switch of disconnection in parallel is by short circuit thus.Arc extinction.Electric current through power semiconductor switch conduction can be disconnected by the corresponding control of power semiconductor now.
In US5999388, described a kind of direct voltage power switch, it can in series be integrated in direct voltage circuit.Its by can connect can switch-off power semiconductor switch series circuit form, the described reverse fly-wheel diode that can switch-off power semiconductor switch be connected in parallel respectively of connecting.In addition for example, with each power semiconductor switch be connected in parallel a discharger for pressure limiting, variable resistor.Known direct voltage switch is pure realization electronically, compares thus obviously switch quickly with common mechanical switch on market.In several microseconds, can disconnect through the mobile short circuit current of direct voltage switch.Yet defect is that operating current also must be through power semiconductor switch conduction.Produce thus high loss.
WO2011/141055 discloses a kind of direct voltage switch, its can be connected in series to one of high-voltage direct current power grid extremely in.Described direct voltage switch is comprised of the mechanical switch of connecting with power semiconductor switch, the described power semiconductor switch reverse fly-wheel diode that is connected in parallel again.The series circuit being comprised of coil and capacitor, namely LC branch road and discharger, be connected in parallel with the series circuit being comprised of power semiconductor switch and mechanical switch, and described discharger is limited in the voltage landing on LC branch road.The power semiconductor switch discharger that is also connected in parallel.After mechanical switch disconnects, power semiconductor switch switches on and off with the natural frequency of LC branch road.In mechanical switch, produce thus vibration and last generation current zero crossing, thereby can make the arc extinction of generation.
Document " Proactive Hybrid HVDC Breakers-A Key Innovation for Reliable HVDC Grids " at J.Heffner and B.Jacobssen, Symposium " The Electric Power System of the Future-Integrating Super-Grids and Micro-Grids International Symposium ", Bologna, Italy, 2011, the 264 pages of 13.-15.September and later in a kind of direct voltage switch is also disclosed.The direct voltage switch that there is described has with the running current path of mechanical switch and the turn-off current path being connected in parallel with running current path.In turn-off current path, arranged the series circuit of power semiconductor switch, described power semiconductor switch is connected with a fly-wheel diode reverse parallel connection respectively.The switch element being formed by power semiconductor switch and fly-wheel diode be differential concatenation arrange, wherein can in series arrange by switch-off power semiconductor switch, and for each power semiconductor switch, a corresponding power semiconductor switch with contrary conducting direction is set.Can disconnect the electric current on the both direction in turn-off current path by this way.In running current path, except mechanical switch, also arranged the electron assistant switch of connecting with mechanical switch.When normal operation, the closed mechanical switch of electric current process running current path and thus process electron assistant switch and process flows, because the power semiconductor switch in turn-off current path is the resistance increasing for direct current.In order to disconnect for example short circuit current, make electron assistant switch transition to its separation point position.Resistance in running current path increases thus, makes the direct current commutation in turn-off current path.Fast mechanical disconnect thus can by no current disconnect.Short circuit current through the conduction of turn-off current path can disconnect by power semiconductor switch.In order to be absorbed in the energy of storing in direct current network and will reduce when connecting, be provided with discharger, it is connected in parallel with the power semiconductor switch in turn-off current path respectively.
If by the high direct voltage access fault direct current network segment, may cause due to the high making current then occurring the less desirable damage of the parts in the fault direct current network segment by known direct voltage switch.
Summary of the invention
The technical problem to be solved in the present invention is thus, and a kind of method is provided, and utilizes the method just can identify fault, for example short circuit in electrical network section between by electrical network section access periods, thereby can introduce as soon as possible counter-measure.
The present invention solves above-mentioned technical problem for the direct voltage switch by having two binding posts by the method for direct current network segment access by a kind of, described direct voltage switch has with the running current path of mechanical switch and the turn-off current path with mechanical switch described in bypass, in described direct voltage switch, having arranged that at least one can be connected can switch-off power semiconductor switch, wherein turn-off current path has than running current path, by the larger resistance of resistance of the section of described turn-off current path bypass, wherein, mechanical switch is disconnected, and the current flowing in turn-off current path is blocked by power semiconductor switch is carried out to suitable control, then one of the first binding post and DC power supply is extremely connected, and one of the second binding post and the direct current network segment is extremely connected, finally by power semiconductor switch is controlled the direct current network segment is controllably applied to voltage, subsequently that mechanical switch is closed.
According to the present invention, by direct voltage switch, come controllably the access of the direct current network segment, this direct voltage switch have with can connect can switch-off power semiconductor switch turn-off current path, and arranged mechanical switch in running current path.
Compare with the structure of such known direct voltage switch, this makes before by the access of electrical network section, mechanical switch to be transformed into its separation point position and to avoid hard access, namely by the access of closed mechanical switch.According to the present invention, electric current process turn-off current path during access and thus process can be connected can the conduction of switch-off power semiconductor switch.Can control by switch-off power semiconductor switch connecting now, make curtage little by little, raise for example slope shape.If the protection equipment of arranging in the direct current network segment to be accessed is determined to be short circuit current; the access of electrical network section can be interrupted as soon as possible; thereby the infringement in the time of can avoiding accessing, for example infringement in direct voltage switch or in the direct current network segment to be accessed itself.Protect equipment control or regulon direct or indirect and direct voltage switch communicate suitably for this reason.
The structure of mechanical switch is arbitrarily within the scope of the invention in principle.Yet importantly, mechanical switch can absorb the voltage of requirement.In addition mechanical switch should as quickly as possible, for example, can disconnect within the time window of 5ms from Trouble Report.According to the present invention, direct voltage switch be connected in series in one of direct current network extremely in, wherein one of the first binding post of direct voltage switch and DC power supply is extremely connected, and another binding post of direct voltage switch and the direct current network segment one is extremely connected.When direct voltage switch normally moves, its binding post has approximately identical electromotive force.The voltage landing on mechanical switch during ground short circuit in the direct current network segment is equivalent to a utmost point thus with respect to the voltage of earth potential.
The structure in turn-off current path, the wiring of power semiconductor switch and the structure of layout are arbitrarily within the scope of the invention in principle in particular.So power semiconductor switch for example can form the series circuit can switch-off power semiconductor switch forming by connecting, wherein each power semiconductor switch and a reverse fly-wheel diode are connected in parallel.Suitable at this, each power semiconductor switch is connected in parallel with the discharger for energy absorption.Power semiconductor switch can differential concatenation ground arrange, wherein the conducting direction of the conducting direction of several power semiconductor switchs and the power semiconductor switch of other arranged in series is contrary.Form by this way two groups of power semiconductor switch, be wherein responsible for disconnecting electric current and a responsible electric current disconnecting on rightabout of another group in direction for one group.In the Heffner that the layout of such differential concatenation is for example mentioned in beginning and the document of Jacobssen, describe.
But unlike this, turn-off current path also can have the submodule with accumulator, for example capacitor.After also to discuss this structure in turn-off current path in detail.
Suitably, after connecting DC power supply and before controllably the direct current network segment being accessed, turn-off current path is connected with earth potential by the charging paths suitably with Ohmic resistance.According to this favourable expansion of the present invention, so electric current passes through can flowing to by switch-off power semiconductor switch of turn-off current path, described electric current is determined by the layout of Ohmic resistance.On this external power semiconductor switch, produce voltage drop.This voltage drop realizes for example energy supply to the electronic device of power semiconductor switch.
In addition, if in turn-off current path, be provided with there is the accumulator separating of itself, such as the submodule of capacitor etc., can be before starting direct voltage switch and before controllably by the access of the direct current network segment first to these capacitors chargings.Charging current flows to ground through described charging paths.Advantageously, charging paths can be connected with turn-off current path through switch.Switch is for example electronic switch.Yet preferably adopt mechanical switch cheaply, yet it uses based on Ohmic resistance, just may.
Suitably, controllably by before direct current network segment access, turn-off current path is by having suitably the charging paths of Ohmic resistance and the phase antipole of DC power supply is connected.According to this favourable expansion, turn-off current path is not to be connected with earth potential as in embodiment above, but is connected with the phase antipole of DC power supply.The concept of " the phase antipole of DC power supply " is understood to the following utmost point of direct current network, and this utmost point is contrary with the polarity of that utmost point that the binding post of direct voltage switch is attached thereto.If for example direct voltage switch is connected in series in the positive pole of bipolar DC electrical network,, according to this suitable expansion of the present invention, turn-off current path is connected with negative pole.This is connected and for example by mechanical switch, is undertaken.If binding post is connected with positive pole and turn-off current path is connected with negative pole through charging paths, the voltage that lands on can switch-off power semiconductor switch, this voltage driving charging current.If arranged accumulator in turn-off current path, can be to charging accumulator.Importantly, before the direct current network segment is accessed, turn-off current path can moved in following meaning, and accumulator or the capacitor that can be recharged if desired through the power semiconductor switch utilization that can work controllably access the direct current network segment.
According to of the present invention, preferably construct herein, in turn-off current path, arrange the series circuit being formed by dipole module, described submodule has respectively accumulator and the power semiconductor circuit in parallel with accumulator, its submodule binding post unique with two of submodule is connected like this, make in the situation that the power semiconductor switch of power semiconductor circuit is carried out to corresponding control, can be created in voltage or the no-voltage on submodule binding post of on accumulator, landing.Such modular in turn-off current path is known in current transformer technology.There is so topological current transformer and be called as " modular multistage current transformer " (" modulare Multilevel-Umrichter (MMC) ").Series circuit based on submodule can produce step by step voltage in turn-off current path, and its intermediate height is determined by the voltage landing on accumulator.
Submodule can be configured to half-bridge circuit or full-bridge circuit.In half-bridge circuit, by two, there is respectively the series circuit that connecting of reverse parallel connection fly-wheel diode can switch-off power semiconductor switch forms, be connected in parallel with the accumulator separately of submodule, wherein the first submodule binding post is connected with the potential point between power semiconductor switch, and the second submodule binding post and accumulator one is extremely connected.Accumulator is capacitor suitably.Substitute the parallel circuits of power semiconductor switch and fly-wheel diode, also can adopt the power semiconductor switch of reverse-conducting.Also can substitute two single power semiconductor switchs, in series circuit, adopt two series circuits of power semiconductor switch.So the power semiconductor of series circuit is synchronously controlled.So the series circuit by the power semiconductor switch of while or Synchronization Control is worked as a single power semiconductor switch.Certainly then can be by larger voltage access.This point is in principle for also setting up at full-bridge circuit described below.
In full-bridge circuit, be provided with two series circuits, it has connecting of reverse parallel connection fly-wheel diode by two respectively and can form by switch-off power semiconductor switch.Two series circuits are also connected in parallel with accumulator, yet wherein the first submodule binding post is connected with the potential point between two power semiconductor switchs of the first series circuit, and the second submodule binding post is connected with the potential point between two power semiconductor switchs of the second series circuit.In full-bridge circuit, not only can be created in voltage or the no-voltage on submodule binding post of on accumulator, landing, but also can produce reverse accumulator voltage.In addition through the mobile electric current of full-bridge, can on both direction, be disconnected.
In half-bridge circuit and in full-bridge circuit, all importantly, submodule has variable resistor or discharger.Discharger or variable resistor are for example connected in parallel with accumulator respectively.Yet can in submodule, use Ohmic resistance in addition.Energy to be reduced, that store in direct current network when discharger is absorbed in access.
Can also in turn-off current path, both construct full-bridge circuit within the scope of the invention and also construct half-bridge circuit.In addition turn-off current path can also have other submodules of differently constructing.In break path, commutation parts can also be set, it is in running current path induction or apply reverse voltage.Such commutation parts are for example the half-bridge circuit of arranged in series or the full-bridge circuit of arranged in series.Commutation parts do not need variable resistor or discharger.
Accompanying drawing explanation
Other suitable structures of the present invention and advantage are the content to the description of embodiments of the invention below with reference to accompanying drawing, and wherein identical Reference numeral represents the parts that act in the same manner, and wherein:
Fig. 1 shows for carrying out the possible direct voltage switch according to method of the present invention,
Fig. 2 shows for carrying out another exemplary DC voltage switch according to method of the present invention,
Fig. 3,4 and 5 shows the possible structure for the submodule of the direct voltage switch according to Fig. 2,
Fig. 6 shows for carrying out another exemplary DC voltage switch according to method of the present invention,
Fig. 7 shows according to the distortion of the direct voltage switch of Fig. 6,
Fig. 8 to 11 show utilize according to the direct voltage switch of Fig. 6, carry out according to the embodiment of method of the present invention, and
Figure 12 to 15 show utilize according to the direct voltage switch of Fig. 7, carry out according to another embodiment of method of the present invention.
Embodiment
Fig. 1 shows the example of the first direct voltage switch 1, utilizes described the first direct voltage switch can carry out according to method of the present invention.Direct voltage switch 1 has the first binding post 2 and the second binding post 3, and extend between it in running current path 4.In running current path 4, arranged for the mobile inductor 5 of Limited Current, mechanical switch 6, mechanical switch 7 and electronic commutation switch 8 relatively fast.Electronic commutation switch 8 has the series circuit can switch-off power semiconductor switch 10 forming by connecting.At these each power semiconductor switch 10 reverse parallel connections, connect a fly-wheel diode 11.
Direct voltage switch 1 also has turn-off current path 9, its bypass mechanical switch 7 and electronic commutation switch 8, and also arranged that therein can connect can switch-off power semiconductor switch 10.Each can connect can switch-off power semiconductor switch 10 again reverse parallel connection connect a fly-wheel diode 11.Can find out, the first two can be connected can switch-off power semiconductor switch, such as IGBT, IGCT etc., have identical conducting direction.This correspondingly sets up for affiliated fly-wheel diode 11.Yet the power semiconductor switch 10 of following is below orientated in contrast to this.If electric current flows to binding post 3 from binding post 2 thus, this electric current can only be disconnected by the first two power semiconductor switch 10.Yet reverse current, namely flows to the electric current of binding post 2 from binding post 3, can only be disconnected by the third and fourth power semiconductor switch 10.In other words, power semiconductor switch 10 differential concatenation ground are arranged.They form two groups, and the conducting direction of the power semiconductor switch of one of them group is orientated in the same manner, but the conducting direction of the conducting direction of the power semiconductor switch of a group and the power semiconductor switch of another group 10 is orientated on the contrary.Can realize the circuit of the direct current on both direction by this way.
In order to be absorbed in by power semiconductor switch 10 energy of storing in direct current network when electric current disconnects, power semiconductor switch 10 is connected in parallel with discharger 12.In embodiment shown in Figure 1, turn-off current path 9 is bipolar modules 13 modularly constructing and that formation is connected in series.In Fig. 1 because general view reason only can be found out two modules 13.But its quantity depends on the height of voltage separately.
According to the embodiment of method of the present invention, first electrical network section to be accessed is connected with binding post 3.At this Quick mechanical switch 7, disconnect, and ready connection can be positioned at its separation point position by switch-off power semiconductor switch 10 in advance.Then Closing Switch 6.By carrying out suitable control by switch-off power semiconductor switch to connecting, for example, by carrying out pulse-width modulation, the voltage providing in the direct current network segment connecting on binding post 3 and thus of outlet side lentamente, increase for example slope shape.If the direct voltage providing on binding post 3 is approximately corresponding to the direct voltage existing on binding post 2 of input side, closed mechanical switch 7.Then can connect and can be transformed into its conducting state by switch-off power semiconductor switch.Direct voltage switch 1 is now ready.The direct current network segment is accessed.Direct voltage switch be in series arranged in one of direct current network extremely in.
Fig. 2 shows another direct voltage switch 1.Direct voltage switch also has running current path 4 and turn-off current path 9 shown in figure 2, wherein in running current path 4, has arranged mechanical switch 7, and it is disconnected current path 9 bypasses.In turn-off current path 9 arranged in series power switch unit 14 and commutation parts 15.In addition be provided with charging paths 16, it has mechanical switch 17 and Ohmic resistance 18, and it is connected turn-off current path 9 in the situation that of switch 17 closure with earth potential.
Power switch unit 14 and commutation parts 15 have respectively the series circuit being comprised of dipole module 19.The quantity of the submodule 19 in power switch unit 14 depends on voltage to be connected.The quantity of the submodule 19 in commutation parts has determined that maximum can produce reverse voltage.
Fig. 3,4 and 5 shows according to the example of the possible submodule 19 of the direct voltage switch of Fig. 2.In the simplest situation, submodule 19 is that connecting of being connected with fly-wheel diode reverse parallel connection can switch-off power semiconductor switch.Each power semiconductor switch 10 discharger 12 that is connected in parallel.Yet for commutation parts 15, do not consider according to the submodule of Fig. 3 19, because it can not produce reverse voltage.Yet the submodule 19 respectively with the accumulator 20 of capacitor form is suitable for this.According to the submodule of Fig. 4, capacitor or accumulator 20 is connected in parallel with the series circuit 21 that the power semiconductor switch 10 that has a reverse parallel connection fly-wheel diode 11 by two forms.The first submodule binding post 22 is connected with the potential point between power semiconductor switch 10 at series circuit 21.On the contrary, another submodule binding post 23 is positioned at a utmost point of one pole capacitor 20.According to can connect can switch-off power semiconductor switch 10 control, thus can be in condenser voltage or the no-voltage that be created in landing on capacitor 20 between binding post 22 and 23.In order to worry that when single submodule breaks down whole direct voltage switch 1 breaks down, can be by each submodule 19 by machinery or electronic switch 24 bypasses fast.Diode 25 between this external binding post 22 and 23 is for guiding high short circuit current.If submodule 19 is parts of power switch unit 14, suitable, capacitor 20 is connected in parallel with discharger.Such discharger 12 is unwanted for the submodule 19 of commutation parts 15.It is only for generation of the reverse voltage in running current path 4, and therefore for generation of the current zero-crossing point in mechanical switch 7.
According to the half-bridge of Fig. 4, can disconnect the current flowing in a direction only.From the current flowing of the second submodule binding post 23 to first submodule binding posts 22 shown in Figure 4, through being arranged in not controlled fly-wheel diode 11 conduction between these binding posts.Therefore can not control this electric current.
Yet the impact of two senses of current can be utilized according to the full-bridge circuit of Fig. 5 and be realized.Figure 5 illustrates submodule 19, it shows full-bridge circuit.Capacitor 20 and two series circuit 21a, 21b are connected in parallel.Each series circuit 21a, 21b have two with oppositely connecting of fly-wheel diode can switch-off power semiconductor switch 10.Submodule binding post 22,23 respectively with power semiconductor switch 10 between potential point be connected.
In order to access direct current network 1, first the binding post of direct voltage switch 13 is connected with the direct current network segment to be accessed.Switch 7 in running current path 4 disconnects.Then by switch 17 closures and turn-off current path 9 are connected with earth potential through Ohmic resistance 18 thus, direct voltage switch 1 is ready through charging paths 16.In the situation that according to the submodule of Fig. 4 or 5 19, can be after applying direct voltage with a binding post being extremely connected 2 of DC power supply, capacitor 20 chargings to submodule 19.From can switch-off power semiconductor switch the control electronic device of power semiconductor switch of voltage feed of 10 landing now also ready.
If power switch unit 14 is ready, can disconnect the switch 17 of charging paths 16, and by the power semiconductor switch 10 to power switch unit 14, carry out suitable control, controllably, by the direct current network segment access being connected with binding post 3, wherein voltage ramp shape ground rises.Yet when the submodule 19 of commutation parts 15 forms the half-bridge circuit according to Fig. 4, this point is easy to realize.The in the situation that of full-bridge circuit, must bypass described in full-bridge circuit, or make submodule 19 ready in advance, to then power semiconductor switch 10 is transformed into its conduction position.Charging paths is for example connected with the potential point commutating between parts 15 and binding post 3 for this reason.Can adopt suitable switch for this reason.Unlike this, in this position, the second charging paths is set.
Fig. 6 shows for carrying out another direct voltage switch 1 according to method of the present invention.Direct voltage switch 1 also has the first binding post 2 and the second binding post 3.Extend between binding post 2 and 3 in running current path 4, in described running current path arranged in series two mechanical switchs 26 and 27.In addition can see turn-off current path 9, utilize this turn-off current path can bypass mechanical switch 26.In turn-off current path 9, arranged power switch unit 14, it is by forming according to the series circuit of Fig. 3,4 or 5 submodule 19.In this external turn-off current path 9, be provided with the 3rd mechanical switch 29.Potential point between power switch unit 14 and the 3rd mechanical switch 29 can be with charging paths 16 and is connected with earth potential thus.Through the 4th mechanical switch 28, can disconnect the current path between binding post 2 and the charging paths 16 of connection, thereby the electric current from binding post 2 to ground only can flow through power switch unit 14, and to being arranged in if desired accumulator 20 chargings there.
For current limliting, the inductor 5 of the forms such as two coils is also set.In turn-off current path 9, also can arrange the not commutation parts shown in figure now, its operation below for direct voltage switch 1 is absolutely necessary.
Fig. 7 show direct voltage switch 1 with the slightly different embodiment of Fig. 6, wherein mechanical switch 28 and 29 next-door neighbour's binding posts 2 and 3 are arranged.The 4th mechanical switch 28 in running current path 4, is correspondingly set up for the 3rd switch 29 now.In the situation that electric current is mobile without power switch unit 14, diode 30 and 31 stops from the current flowing of binding post 2 or 3 charging paths 16 that directly flow direction is connected.Thus can be by the charging accumulator of 16 pairs of power switch units 14 of charging paths.
Now according to Fig. 8,9,10 and 11 for according to the switch example of Fig. 6 illustrate according to method of the present invention.First all mechanical switchs 26,27,28 and 29 are in its open position.Binding post 2 is connected with the positive pole of DC power supply, for example direct current network, and binding post 3 is connected with the direct current network segment to be accessed.Direct current network to be accessed under initial condition is approximately in earth potential.Supposition for the sake of simplicity, power switch unit 14 is by according to the series circuit of the submodule of Fig. 5, be namely comprised of full-bridge.For capacitor 20 is charged, by mechanical switch 27 closures in mechanical switch 17, live part 16 and running current path 4.Charging current flows through power switch unit 14 thus, and its size is determined by the resistance 18 of charging paths 16.The voltage that also lands on power semiconductor switch 10, by this voltage to can connect can switch-off power semiconductor switch 10 electronic device supply required energy.
Figure 9 illustrates the charging of capacitor 20, wherein show the current path of charging current I figure.
If capacitor 20 is charged and electronic device is ready, the switch of charging paths 16 17 is disconnected and by the 3rd mechanical switch 29 closures, thereby can be connected to the controlled access of the direct current network segment on binding post 3.At this power semiconductor switch 10 of power ratio control switch element 14 pointedly, thereby realize the slow rising of voltage.If on binding post 3, the direct voltage of landing is about as much as the voltage applying on binding post 2, the first switch 26 closures in running current path 4.Electric current is thus through 4 conduction of running current path.
Figure 12 to 15 shows the embodiment according to method of the present invention by the direct voltage switch 1 according to Fig. 7.First for to accumulator 20, charging makes power semiconductor switch 14 closures, and for make to connect can switch-off power semiconductor switch electronic device work by switch 17,27 and 28 closures.Figure 13 illustrates for the charge current flows I to accumulator 20 chargings.
Then the switch of charging paths 16 17 is disconnected, and by 29 closures of the switch on binding post 3.In this position of the switch, can be connected to now the controlled charging of the direct current network segment on binding post 3.Connecting of power ratio control switch element 14 can switch-off power semiconductor switch 10 pointedly and controllably for this reason.By Closing Switch 17, in normal operating condition, also can realize the charging of accumulator 20.The diode 30,31 embedding forces charging current to flow to ground through power switch unit 14.
Claims (8)
1. one kind for by having two binding posts (2,3) direct voltage switch (1) is by the method for direct current network segment access, described direct voltage switch has with the running current path (4) of mechanical switch (7) and the turn-off current path (9) with this mechanical switch of bypass (7), in described direct voltage switch, arranged that can connect can switch-off power semiconductor switch (10), wherein said turn-off current path (9) have than described running current path (9), by the path bypass of described turn-off current section the larger resistance of resistance, wherein
-described mechanical switch (7) is disconnected, and be blocked through the current flowing of described turn-off current path (9),
-then, one by the first binding post (2) with DC power supply is extremely connected, and with the direct current network segment is extremely connected by the second binding post (3),
-last, by power semiconductor switch (10) is controlled the direct current network segment is controllably applied to voltage, and
-subsequently by described mechanical switch (7) closure.
2. method according to claim 1,
It is characterized in that, after connecting a utmost point of DC power supply and before controllably the described direct current network segment being accessed, described turn-off current path (9) is connected with earth potential by the charging paths (16) with Ohmic resistance (18).
3. method according to claim 1,
It is characterized in that, before controllably by described direct current network segment access, described turn-off current path (9) is connected with the phase antipole of DC power supply by the charging paths (16) with Ohmic resistance (18).
4. method according to claim 3,
It is characterized in that, before the first binding post (2) and DC power supply one is extremely connected, described turn-off current path (9) is connected with the phase antipole of DC power supply.
5. according to the method described in any one in the claims,
It is characterized in that, in described turn-off current path (9), arranged the series circuit being formed by dipole module (19), described submodule has respectively accumulator (20) and the power semiconductor circuit (21) in parallel with accumulator (20), the submodule binding post (22 of itself and submodule (19), 23) connect like this, make in the situation that the power semiconductor switch of power semiconductor circuit (21) (10) is carried out to corresponding control, can be created in the voltage of the upper landing of accumulator (20) or be created in the no-voltage on submodule binding post (22,23).
6. method according to claim 5,
It is characterized in that, described submodule (9) forms half-bridge circuit at least in part, wherein by two, having the series circuit (21) that connecting of reverse parallel connection fly-wheel diode (11) can switch-off power semiconductor switch (10) form is connected in parallel with accumulator (20) separately, wherein the first submodule binding post (22) is connected with the potential point between power semiconductor switch (10), and the second submodule binding post (23) and accumulator (20) one is extremely connected.
7. according to the method described in claim 5 or 6,
It is characterized in that, described submodule (19) forms full-bridge circuit at least in part, wherein by two, there are two series circuit (21a that connecting of reverse parallel connection fly-wheel diode (11) can switch-off power semiconductor switch (10) forms respectively, 21b) be connected in parallel with accumulator (20) separately, and the first submodule binding post (22) is connected with the potential point between power semiconductor switch (10) at the first series circuit (21a), and the second submodule binding post (23) is connected with the potential point between power semiconductor switch (10) at the second series circuit (21b).
8. according to the method described in any one in claim 5-7,
It is characterized in that described submodule (19) be connected in parallel variable resistor or discharger (12).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2012/054125 WO2013131580A1 (en) | 2012-03-09 | 2012-03-09 | Method for connecting a dc voltage network section by means of a dc voltage switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104160464A true CN104160464A (en) | 2014-11-19 |
| CN104160464B CN104160464B (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280071253.7A Active CN104160464B (en) | 2012-03-09 | 2012-03-09 | For the method unidirectional current network segment accessed by DC voltage switch |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2810289B1 (en) |
| CN (1) | CN104160464B (en) |
| ES (1) | ES2585818T3 (en) |
| PL (1) | PL2810289T3 (en) |
| WO (1) | WO2013131580A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109789789A (en) * | 2016-08-01 | 2019-05-21 | 西门子移动有限公司 | Drive system for rail vehicle |
| CN110352558A (en) * | 2017-02-28 | 2019-10-18 | 西门子股份公司 | For separating the switching device of current path |
| CN110350896A (en) * | 2018-04-06 | 2019-10-18 | 伊顿智能动力有限公司 | Low-voltage protection device |
| CN110462960A (en) * | 2017-03-23 | 2019-11-15 | 西门子股份公司 | Effective precharge of the segmentation of DC voltage network |
| CN110663180A (en) * | 2017-06-02 | 2020-01-07 | 通用电器技术有限公司 | Switching device |
| CN112703648A (en) * | 2018-09-19 | 2021-04-23 | 西门子股份公司 | Device and method for coupling two direct current networks |
| CN113396540A (en) * | 2019-02-05 | 2021-09-14 | 西门子能源全球有限两合公司 | Switching device for breaking a current path |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10354820B2 (en) | 2014-01-21 | 2019-07-16 | Siemens Aktiengesellschaft | Device for switching a direct current |
| JP6392154B2 (en) * | 2015-03-27 | 2018-09-19 | 株式会社東芝 | DC current interrupting device and control method thereof |
| KR101794945B1 (en) * | 2015-08-24 | 2017-12-01 | 주식회사 효성 | DC Circuit Breaker |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0867998A1 (en) * | 1997-03-24 | 1998-09-30 | Asea Brown Boveri Ab | A plant for transmitting electric power |
| DE69408811T2 (en) * | 1993-12-09 | 1998-10-22 | Asea Brown Boveri | DC high-performance switch |
| CN1280856C (en) * | 2002-04-12 | 2006-10-18 | Lg产电株式会社 | Hybrid DC electromagnetic contactor |
| DE102008057874A1 (en) * | 2008-11-18 | 2010-05-20 | Adensis Gmbh | Switch circuit for a photo-voltaic assembly, at a current circuit, has a mechanical switch and a second electronic switch |
| WO2011141055A1 (en) * | 2010-05-11 | 2011-11-17 | Abb Technology Ag | A high voltage dc breaker apparatus |
| CN102349124A (en) * | 2009-03-25 | 2012-02-08 | 埃伦贝格尔及珀恩斯根有限公司 | Switch disconnector for galvanic direct current interruption |
| CN102687221A (en) * | 2009-11-16 | 2012-09-19 | Abb技术有限公司 | Device and method to break the current of a power transmission or distribution line and current limiting arrangement |
-
2012
- 2012-03-09 EP EP12709061.1A patent/EP2810289B1/en active Active
- 2012-03-09 ES ES12709061.1T patent/ES2585818T3/en active Active
- 2012-03-09 PL PL12709061T patent/PL2810289T3/en unknown
- 2012-03-09 CN CN201280071253.7A patent/CN104160464B/en active Active
- 2012-03-09 WO PCT/EP2012/054125 patent/WO2013131580A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69408811T2 (en) * | 1993-12-09 | 1998-10-22 | Asea Brown Boveri | DC high-performance switch |
| EP0867998A1 (en) * | 1997-03-24 | 1998-09-30 | Asea Brown Boveri Ab | A plant for transmitting electric power |
| CN1280856C (en) * | 2002-04-12 | 2006-10-18 | Lg产电株式会社 | Hybrid DC electromagnetic contactor |
| DE102008057874A1 (en) * | 2008-11-18 | 2010-05-20 | Adensis Gmbh | Switch circuit for a photo-voltaic assembly, at a current circuit, has a mechanical switch and a second electronic switch |
| CN102349124A (en) * | 2009-03-25 | 2012-02-08 | 埃伦贝格尔及珀恩斯根有限公司 | Switch disconnector for galvanic direct current interruption |
| CN102687221A (en) * | 2009-11-16 | 2012-09-19 | Abb技术有限公司 | Device and method to break the current of a power transmission or distribution line and current limiting arrangement |
| WO2011141055A1 (en) * | 2010-05-11 | 2011-11-17 | Abb Technology Ag | A high voltage dc breaker apparatus |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109789789A (en) * | 2016-08-01 | 2019-05-21 | 西门子移动有限公司 | Drive system for rail vehicle |
| CN110352558B (en) * | 2017-02-28 | 2023-07-28 | 西门子能源全球有限公司 | Switching device for separating current paths |
| CN110352558A (en) * | 2017-02-28 | 2019-10-18 | 西门子股份公司 | For separating the switching device of current path |
| CN110462960B (en) * | 2017-03-23 | 2023-07-28 | 西门子股份公司 | Efficient precharge of segments of a DC voltage network |
| CN110462960A (en) * | 2017-03-23 | 2019-11-15 | 西门子股份公司 | Effective precharge of the segmentation of DC voltage network |
| CN110663180A (en) * | 2017-06-02 | 2020-01-07 | 通用电器技术有限公司 | Switching device |
| CN110663180B (en) * | 2017-06-02 | 2023-07-28 | 通用电器技术有限公司 | Switching device |
| CN110350896A (en) * | 2018-04-06 | 2019-10-18 | 伊顿智能动力有限公司 | Low-voltage protection device |
| CN112703648A (en) * | 2018-09-19 | 2021-04-23 | 西门子股份公司 | Device and method for coupling two direct current networks |
| CN112703648B (en) * | 2018-09-19 | 2024-01-19 | 西门子股份公司 | Device and method for coupling two DC grids |
| CN113396540A (en) * | 2019-02-05 | 2021-09-14 | 西门子能源全球有限两合公司 | Switching device for breaking a current path |
| CN113396540B (en) * | 2019-02-05 | 2023-10-20 | 西门子能源全球有限两合公司 | Switching device for switching off a current path |
| US11881706B2 (en) | 2019-02-05 | 2024-01-23 | Siemens Energy Global GmbH & Co. KG | Switching device for opening a current path |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2810289B1 (en) | 2016-05-04 |
| EP2810289A1 (en) | 2014-12-10 |
| ES2585818T3 (en) | 2016-10-10 |
| WO2013131580A1 (en) | 2013-09-12 |
| PL2810289T3 (en) | 2017-04-28 |
| CN104160464B (en) | 2016-09-21 |
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