CN101258671A - Equipment used for transferring electric energy - Google Patents
Equipment used for transferring electric energy Download PDFInfo
- Publication number
- CN101258671A CN101258671A CNA2005800515295A CN200580051529A CN101258671A CN 101258671 A CN101258671 A CN 101258671A CN A2005800515295 A CNA2005800515295 A CN A2005800515295A CN 200580051529 A CN200580051529 A CN 200580051529A CN 101258671 A CN101258671 A CN 101258671A
- Authority
- CN
- China
- Prior art keywords
- equipment
- converter
- parallel
- phase
- direct current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention relates to a device for electron energy transfer which comprises at least one current converter. Every current converter has phase elements with at least one series connection of circuit elements each that comprise at least two turn-off power conductors each and at least two free-wheeling diodes, each connected in parallel thereto, and energy storing means. The aim of the invention is to improve the transfer properties in or between power distribution networks.; For this purpose, the phase elements comprise at least two respective parallel branches, connected in series thereto and having a respective series connections of circuit elements.
Description
Technical field
The present invention relates to a kind of equipment that is used for electric energy transmitting, this equipment comprises at least one converter, wherein, each converter has the phase element that has at least one series circuit of being made up of switch element respectively, and these switch elements comprise at least two power semiconductors that can disconnect and at least two idle running diode and energy storing devices in parallel with described power semiconductor respectively respectively.
Background technology
DE 10103031A1 discloses this equipment.Disclose a kind of converter with a plurality of capacitors as energy accumulator there, these capacitors are set to each switch element respectively.Wherein, switch element has the power semiconductor that disconnects that has idle running diode in parallel.By adopting a plurality of capacitors that can single connection can be to regulating by the voltage that converter produced, this adjusting is compared with the voltage-regulation of the converter that energy accumulator its same center of switch element, that all switch elements are public is cooperated mutually, more accurately or in other words more careful.
In the field of energy distribution, usually converter is interconnected and is coupled at alternating current one side and first or second transmission network constituting under the short condition that connects (Kurzkupplung) in direct current one side.For example, connect interconnective transmission network by this weak point and can have different voltage levvls, frequency, phase place or mid point manipulation (Sternpunktbehandlungen).By connecting suitable adjusting to short, can be in the first and second energy networks or between transmit active power and/or reactive power targetedly.
Except short the connection, in power transfer and distribution field, converter be used to so-called high voltage direct current transmission (
) equipment with so-called flexible exchange transmission system (Flexible ACTransmission System, FACTS) in.In its such application, converter has power semiconductor, for example controllable silicon that works in line commutated technology (netzgef ü hrter Technik).But, in commutation topological structure (selbstgef ü hrte Topologie), also adopting the power semiconductor that to disconnect, so-called insulated gate bipolar transistor npn npn (IGBT) for example.The so-called voltage source converter that has the power semiconductor that can disconnect (Voltage Sourced Converter, VSC) in, need energy temporary storage, capacitor normally.Having in the converter of commutation and the device as the capacitor of energy temporary storage, shortcoming is because the size of the capacitor that is adopted and restriction that through-put power is caused.Under failure condition, extremely high short circuit current can cause the damage of equipment.Therefore, utilize up to now this device only realized in practice up to approximately ± transmission voltage of 150kV and the through-put power of about 300 to 500 megawatts.
Summary of the invention
The technical problem to be solved in the present invention is, the equipment that provides a kind of this paper to begin the described type of part utilizes this equipment can regulate the voltage that can be produced by converter more meticulously.
The present invention solves the problems of the technologies described above as follows: described phase element has the parallel branch of at least two connections parallel with one another respectively, and described parallel branch has the series circuit of switch element respectively.
According to the present invention, each phase element has at least two parallel branches.Each parallel branch is made up of the series circuit of switch element, is respectively these switch elements and is equipped with energy storing device.Therefore, can be distributed on the energy storing device of larger amt according to the needed capacity of converter of the present invention, these energy storing devices can be connected individually.In this manner, allow carrying out more accurate adjusting or in other words more careful classification by the voltage that converter produced.This can careful classification voltage can in using arbitrarily, adopt within the scope of the invention.For example, be connected with load connector or transmission network according to equipment of the present invention.This transmission network has one or more phase places, and is set for the guiding alternating current.Within the scope of the invention, alternating voltage not only be understood that basic parameter of oscillation, but also the time that is understood that go up the change in voltage that changes arbitrarily.
The 26S Proteasome Structure and Function of switch element has been described in DE 10103031A1, this with the document all as a part disclosed by the invention.What have advantage in the series circuit of this switch element is, with the energy distribution of being stored in the less energy storing device of a plurality of difference, thereby overcome voltage limit or Power Limitation in the layout of single energy storing device such as capacitor.In addition, energy storing device by these distributions allows the thinner classification by the voltage that converter provided with respect to the equipment with public energy storing device only, thereby reduces to be used for the expense of the level and smooth and filtering on the tie point of this equipment.For example, simplified the coupling of converter in transmission network or load significantly.Omitted expensive magnetic couplings measure (for example passing through the coupling of the series circuit of Transformer Winding) within the scope of the invention.In addition, guaranteed the raising of operational reliability, because under the situation of (for example causing by short circuit) fault of single switch element, other switch element keeps as working before this according to the present invention.The single switch element of phase element works as controllable voltage source, and has three possible states.In first state, the terminal voltage of switch element equals condenser voltage.In second state, the terminal voltage of switch element is except the conducting voltage of the power semiconductor that can disconnect or idle running diode no better than zero, and wherein, the third state is set for failure condition.
According to the present invention, described equipment is modular.This modular is realized by the phase element that itself is subdivided into switch element again.Switch element or identical and particularly utilize identical energy storing device structure, thus identical storage capacity had.But, difference also can adopt the combination with different Capacity design within the scope of the invention therewith.
In a kind of suitable expansion of the present invention, each parallel branch has the even number switch element, wherein, is used for each phase element is connected to the centre that joint on load or the transmission network is connected this parallel branch.The prerequisite that is arranged on the middle joint of series circuit is the even number switch element.Wherein, all switch elements are same configuration.In other words, each phase element is constructed symmetrically with respect to this joint.For example, the switch element of series circuit one side of the phase element of symmetric construction is in first state more described above, and the switch element of opposite side is in equally at second state more described above, perhaps conversely.Utilize this control then to realize maximum magnitude of voltage.If one or more is controlled to be another kind of state respectively at the switch element on the side separately, has then formed the voltage classification of the height of voltage with single switch element.
But, within the scope of the invention, also can adopt the phase element that has the odd number switch element and/or have the non-load connector placed in the middle or the phase element of network joint.Each switch element for example is designed to identical or different voltages, and with binary system or the differently classification of other system, under the condition of the switch element of equal number, can be realized being compared to the finer adjustment of identical voltage condition thus by suitably.
In a kind of suitable expansion, a plurality of phase elements connection parallel with one another of converter.At this, phase element constitutes a kind of bridgt circuit.Converter works as known so-called voltage source converter (VSC) own, and therefore can be connected with transmission network, direct current lead or load according to the mode with advantage.At this, converter for example produces the alternating current of leggy.By suitable adjusting device, can optionally influence the zero phase angle and/or the amplitude that are coupled to the alternating current in the transmission network, and be to influence independently of each other.The notion zero phase angle is understood that the phase difference between alternating voltage and the reference value, and this reference value depends on respectively according to equipment of the present invention institute requirement.Therefore, as just for example, the alternating current of transmission network that here will be on tie point is called reference value.Therefore, this converter also can be for example as active filter element replace or with passive filter (for example RC circuit) in combination, be used for carrying out active power filtering, and/or be used for the asymmetric of bucking voltage at the voltage distortion that is lower than and/or be higher than in the frequency range of mains frequency (subharmonic, super subharmonic).At this, be coupled into this voltage, thereby for example eliminate the voltage deviation of the sinusoidal form that causes by negative interference from converter.
What have advantage is, in the application that has three phase elements parallel with one another according to converter of the present invention, there is not energy storing device to be connected in direct current one side with the direct current lead, because each switch element of phase element itself has energy storing device, this device not only as energy accumulator, but also to be used for carrying out on direct current one side voltage level and smooth.In second converter, adopt three phase elements parallel with one another make by the switch element that has energy storing device can produce can more careful classification the leggy alternating current so that for example be coupled in the AC network that is connected.
In addition, this voltage source converter also can use as inverter in direct current transmission.Like this, this converter or more definitely comprise for example three phase elements for inverter according to the connection parallel with one another of known bridgt circuit.Device with two phase elements that are connected in parallel also provides the inverter that will be used for direct current transmission to be connected to only to have single phase place on the transmission network of (for example passing through coupling transformer) or has been connected to simple possibility on the transmission network with a plurality of phase places.In scope of the present invention, the notion of direct current transmission both comprised high voltage direct current transmission (
), also comprise in the straightening flow transmission (
) and the low-voltage direct transmission (
).
In another embodiment, a plurality of phase elements are connected in series mutually.This layout similarly works as voltage source converter, and for example can play the effect of inverter in direct current transmission equipment.At this, this series circuit allows the higher direct voltage of under predetermined electric power transmission, promptly has lower electric current and a therefore lower loss.
In a kind of preferred expansion, energy storing device is set in parallel with described phase element.These extra energy storing devices are used to further level and smooth and stable.
In another embodiment, each phase element has at least one impedance, perhaps is connected with another phase element by at least one impedance.The effect that restriction may the circuital current that (for example because voltage fluctuation or voltage are asymmetric) occurs between each phase element is played in this impedance that constitutes as coil under the simplest situation in a preferred aspect.In addition, can construct these impedances like this: make and under failure condition, limited electric current rising steepness and/or current amplitude.At this, this impedance for example or with the single switch element connected in series of phase element or phase element is connected, and perhaps is integrated in the switch element by (for example according to the modular construction mode with advantage).
A kind of preferred embodiment in, at least one converter can be connected with transmission network or DC conductance line parallel ground.This layout plays the so-called shunt compensation for the control of reactive power and/or active power, and the dynamic adjustments function of realized for example being used to decaying undesirable power hunting and/or subsynchronous resonance and/or subharmonic or super subharmonic.This expansion with advantage also for example is used for voltage symmetryization.
What have advantage especially is, compare with known shunt compensation equipment, in equipment according to the present invention's expansion, series circuit by the switch element described in the above can be coupled into alternating current that can careful classification in the transfer wire, wherein, the energy that is used for producing alternating current is stored in the energy storing device of the distribution of single switch element, and single capacitor is used as energy accumulator and because its size former thereby play effect to the restrictive element of the transmission voltage of this equipment and power in known equipment.That therefore, utilizes the energy storing device have in each switch element can adjust voltage to be coupled into more meticulously according to equipment of the present invention.
In another embodiment, at least one converter can be connected in series with transmission network.By connect and/or be coupled into the voltage that changes on one's own initiative on size and/or phase place, this connection is used for the reactive power of transmission network and/or active power are waken up with a start control equally, comprises the dynamic adjustments function of having described.Preferably, comprise a plurality of converters according to equipment of the present invention, in these converters one in parallel with transmission network and one connect with transmission network.By being coupled into two voltages that on size and/or phase place, dynamically change on one's own initiative, improved the dynamic adjustments function of controlling or having described for the reactive power and/or the active power of transmission network.Transmission network for example is the transfer wire of single-phase or leggy.
In a kind of different execution mode, each converter is connected with direct voltage source.According to this suitable expansion, can between this direct voltage source and converter, produce direct voltage.This converter or more definitely then be used for direct current is transformed into alternating current for inverter.But, converter is can be optional as the type of action of rectifier or inverter.
According to a kind of relevant therewith suitable expansion, direct voltage source is the converter of rectification.Have the expansion of advantage according to this, two converters for example are set.Like this, two converters are as direct current transportation equipment or the short interconnective inverter work of dc terminal that connects.By determining active power waiting for transmission and/or reactive power and/or they component separately to the suitable adjusting of converter.
The converter of rectification preferably is connected with at least two converters.A kind of like this equipment is also referred to as multi-terminal equipment.
What have advantage is that converter directly interconnects under the condition that constitutes short connection.This equipment is also referred to as back-to-back (back to back) direct current transmission equipment.This weak point connects and comprises for example two interconnective converters of dc terminal within the scope of the invention.Different therewith is that short the connection comprises the interconnective converter of a plurality of dc terminal.For example, the short connection that connects a plurality of transmission networks of permission of this multiple terminals wherein can be controlled at the load flow (Lastfluss) between these networks targetedly.
According to a kind of different therewith embodiment, converter interconnects by means of the direct current lead.In this manner, provide a kind of so-called direct current long-distance transmissions equipment.This direct current long-distance transmissions equipment can have only two or more converters equally.Under mutual situation, between converter, transmit the nominal parameter of regulating by suitable transfer of data away from the converter of arranging.What have advantage is that the converter phase mutual edge distance number kilometer ground of this direct current long-distance transmissions equipment is arranged.
In a kind of suitable expansion, described direct current lead is one pole or bipolar.Bipolar direct current lead allows the higher power of transmission.The direct current lead of one pole (it feeds back direct current by ground or under the situation of submarine cable by water) brings cheap equipment.According to the DC conductance transmission network network single-phase or two-phase on alternating current one side of long-distance transmissions equipment of the present invention, make to be connected to the network that on the dedicated network, for example is used for railway power supply.Naturally, multipole within the scope of the invention direct current lead also is possible.Direct current transportation utilizes the direct current lead of any configuration to carry out in principle.
But, what have advantage is that described direct current lead is gas isolated transfer wire, cable and/or overhead wire at least in part.Naturally, the combination of these leads also is fine within the scope of the invention.Compare with cable (also comprising the combination with overhead wire), the special advantage of gas isolated transfer wire (GIL) is, to the better controllability of dynamic adjustments and defencive function, because this gas isolated lead has littler charging capacity.A kind of equipment of further developing in this manner of the present invention for example is used for the direct current long-distance transmissions, so that produce direct current by means of first rectifier from the alternating current of single-phase or leggy.
In the another kind of execution mode of this expansion, described direct current lead constitutes by impedance (passing through coil under the simplest situation).For example, utilization can connect by the known so-called weak point of formation itself as the coil of direct current lead, and wherein, coil has been born such as function level and smooth, that limit electric current and/or restriction rising steepness.
In a kind of suitable execution mode, converter has the power semiconductor of line commutated.This enforcement of equipment allows to reduce cost of device, this equipment has such converter, promptly this converter for example has the bridgt circuit of being made up of the power semiconductor of line commutated (controllable silicon for example, the perhaps diode of the power semiconductor that can disconnect of the replacement under the simplest situation).
In a kind of suitable execution mode, described switch element another diode that is connected in parallel respectively.This another diode for example is known pressure contact diode itself, such as board-like photodiode (Scheibenzellendiode), or in pressure contacting electronic module integrated diode, this diode can be under the situation that one or more switch elements break down control by the correspondence of adjuster be configured to bridge joint to out of order switch element, allow converter to continue operation thus.At this, even by suitably controlling intact switch element is set up the short time targetedly on out of order switch element overvoltage, make the diode be connected in parallel fuse (durchlegieren) fully, and keep the switch element bridge joint that will damage before the replacing in maintenance period next time always.In addition, integrated idle running diode also can have this bridging functionality under failure condition of switch element in the power semiconductor.
According to selected term here, energy storing device comprises for example energy accumulator and the capacitor of battery, flywheel or super capacitor (Super-Caps).These energy accumulators are compared with capacitor has significantly higher energy density.This has such advantage: even under transmission network or long voltage disconnects in the direct current lead situation, also kept having to reactive power and/or active power control and the dynamic adjustments function described.The result that employing has the energy storing device of high energy density is the better availability of system.
What have advantage is that described energy storing device to small part is a capacitor.It is cheap that capacitor is compared with present known energy accumulator.
What have advantage is that at least two parallel branches interconnect by means of Transformer Winding.Different therewith is that at least two parallel branches connect electric current ground by a parallel branch mutually and connect.Should connect the cheap make that allows transformer by means of the electric current that parallel branch connects, this transformer is used for and will be connected to transmission network or load according to equipment of the present invention.
A kind of preferred embodiment in, converter is connected with described direct current lead by means of energy accumulator.Have under the condition of energy accumulator of high energy density this better availability that has been connected to form system in employing.In according to this expansion of the present invention, also consider the energy accumulator except super capacitor for example above-mentioned as energy accumulator.The series connection or in parallel energy accumulator is connected on the direct current lead.
What have advantage is that this equipment constitutes direct current transmission equipment and/or so-called FACTS (FlexibleAC Transmission System exchanges transmission system flexibly), and provides the output voltage of careful classification at this.Another advantage is not have transmission reactive power and/or active power under the expensive magnetic-coupled condition.At this, constitute according to the modular construction mode advantageously according to equipment of the present invention.Particularly preferably be, to be used for direct current transportation according to equipment of the present invention, and/or be used to construct so-called static synchronous compensator (Static Synchronous Compensator, STATCOM), static series compensator (Static Synchronous Series Compensator synchronously, S3C) or unified power flow controller (Unified Power Flow Controller, UPFC).
Description of drawings
Execution mode that the present invention is suitable and advantage are the contents that following contrast accompanying drawing is described the embodiment of the invention, and identical reference marker has been given the parts with same function in the accompanying drawing.In the accompanying drawing:
Fig. 1 represents the schematic diagram according to a kind of embodiment of equipment of the present invention;
Fig. 2 represents the circuit arrangement according to the switch element of the equipment of Fig. 1;
Another embodiment of the switch element of Fig. 3 presentation graphs 1;
Fig. 4 represents to have the illustrative diagram of converter of series circuit of the phase element of present device;
Fig. 5 represents to have the illustrative diagram of converter of parallel circuits of the phase element of present device;
Fig. 6 represents another embodiment according to equipment of the present invention.
Embodiment
In Fig. 1, show and be used for transmission network or AC network 2 connects 1 to the high pressure of another AC network 3 bidirectional powers transmission is short as the equipment that is used for electric energy transmitting.At this, AC network 2 is connected 1 connection with 3 by the transformer that do not illustrate and/or coil or electric current ground and this high pressure are short.The short connection 1 of high pressure comprises: first current transformer 4 as converter is used for alternating current is transformed into direct current; Direct current connects 5; And, be used for direct current is transformed into alternating current as second current transformer 4 of converter.First current transformer 4 has three phase elements 10,11,12, and these phase elements are respectively by two parallel branches 7,7 ' combine.The switch element 10a...10i that each parallel branch is provided with by a plurality of series connection again, 10a ' ... 10i ', 11a...11i, 11a ' ... 11i ', and 12a...12i, 12a ' ... 12i ' composition.At this, for the reason of symmetry, each phase element 10,11,12 is connected with a phase place of the alternating current of AC network 2 respectively in the centre of the series circuit of switch element.Be connected 8 by the transformer that does not illustrate with the parallel branch of AC network coupling, play the effect of connection.Parallel branch connect 8 with just be connected be provided with between the lead 5 be arranged on parallel branch is connected 8 with bear be connected lead 5 ' between the switch element of lucky as much.Therefore, phase element carries out in the centre that is connected of AC network 2.
Second current transformer 6 comprises three phase elements 13,14,15 equally, these phase elements have equally two parallel branches 7,7 '.Each parallel branch 7,7 ' again is by even number switch in series 13a...13i, 13a ' ... 13i ', 14a...14i, 14a ' ... 14i ', and 15a...15i, 15a ' ... 15i ' composition, phase element have the joint of a phase place that is used for AC network 3 respectively in the centre of series circuit.At this, this joint also is to realize as the transformer that does not illustrate among the figure.
In addition, high pressure is short connect 1 also be included in direct current connect 5,5 ' end separately on other with 9, the circuit arrangement of 9 ' mark, these circuit arrangements are made up of capacitor and/or coil and/or resistance and/or discharger, and it is set for smooth dc voltage or stable transfer extraly.
In the connection of direct current one side of phase element 10,11,12 and 13,14,15 or respectively between the connection in the transition joint in alternating current one side of relevant phase element, the coil that other does not illustrate in the drawings can also be set.These coils are limited in the possible circuital current between the phase element.
Fig. 2 and Fig. 3 show circuit arrangement of equal value, they disclose and are used as switch element 10a...10i, 11a...11i, 12a...12i by DE 10103031A1,13a...13i, 14a...14i, 15a...15i and 10a ' ... 10i ', 11a ' ... 11i ', 12a ' ... 12i ', 13a ' ... 13i ', 14a ' ... 14i ', 15a ' ... 15i ' is used in the equipment according to Fig. 1.These switch elements comprise 24,25 and capacitors 26 as energy storing device of 22,23, two diodes of 20,21, two power semiconductors of two splicing ears respectively. Power semiconductor 22 and 23 is the electronic switch that can disconnect in the example shown and is IGBT at this.But, also can adopt IGCT, MOS switching field effect transistor or the like as power semiconductor.Described the circuit arrangement of a plurality of such switch elements and the function of series circuit in DE 10103031A1, it is quoted by this becomes content disclosed by the invention.Each switch element can be designed to identical or different voltage ranges, also for example by with binary system or the differently classification of other system.In case of necessity, the extra diode that does not illustrate in the connection layout on splicing ear 20,21 is used under failure condition the bridge joint to switch element.
Figure 4 illustrates be applied in according in the equipment of the present invention, according to another embodiment of the converter of so-called H circuit, wherein, for phase element 27,28,29 switch element 10a...10i and 10a ' are set according to Fig. 2 ... 10i ', 11a...11i and 11a ' ... 11i ', 12a...12i and 12a ' ... 12i '.Each phase element 27,28,29 comprise again two parallel branches 7,7 that have the switch element that is connected in series respectively '.These parallel branchs interconnect by two connection leads that are connected a lead and a centre in Fig. 4 middle and upper part with the outside shown in the bottom respectively, and wherein, series connection has inserted the switch element of equal number between the connection lead middle and each outside.The middle lead that connects has a phase place joint 30,31,32 respectively, is used for being connected with two phase places of the alternating current that is inserted. Phase place joint 30,31,32 is illustrated by the secondary joint as transformer 30,31,32 schematically, measures or apply each alternating voltage on an elementary side that does not illustrate of these transformers.The phase element 27,28,29 that is connected in series mutually is in parallel with capacitor 33,34,35.If the operation of shown device is used for producing alternating current, then by each phase element from the direct current that is coupled in direct current one side by suitably controlling in the phase place of alternating current that each switch element is fed into alternating current leggy.Capacitor 33,34,35 plays extra stable and level and smooth effect and only selectively is provided with.This device works according to the principle of voltage source converter, and according to the alternating current that produces three-phase from direct current direct current one side feed-in or that pass through converter generation itself.Thus, this device also can be used as the alternating current that is used for three-phase naturally and is transformed to galvanic current transformer and use conversely.
Fig. 5 shows the converter of the parallel circuits that has phase element 27,28,29, utilizes its realization to compare higher transmission current with the series circuit of Fig. 4. Phase element 27,28,29 in this embodiment for example by means of coil 36,37,38 and 36 ', 37 ', 38 ' be connected with bipolar DC circuit, on this DC circuit, can connect transfer wire, cable, GIL or their combination in any.
Fig. 6 schematically shows another embodiment of the present device 39 that is used for electric energy transmitting.This equipment 39 comprises the converter 40 on the transfer wire 41 that is connected to transmission network, and wherein, converter 40 direct currents one side is connected with capacitor 52 and an optional direct voltage source 42.Transfer wire 41 is a part that has the power supply grid of load connector as transmission network.
Except other be used to regulate the shown device of the present invention 39, control and regulon 43 are used for control and adjusting converter 40, the measurement alternating current I that will be gathered by means of current measuring unit 44
ACWith the measurement alternating voltage U that is obtained by means of voltage measurement unit 45
ACBe transferred to this control and regulon, and compare with the rated value of being scheduled to therein, so that the alternating current of and phase matched ground control transmission lead 41 dynamic by means of suitable control method.To be pointed out that once more that at this notion alternating current comprises the variation of time arbitrarily that is loaded into as the voltage on the transfer wire 41 of transmission network, and be not limited to the change in voltage of sinusoidal form or harmonic wave.
As current transformer shown in Figure 14,6 or as at the converter shown in Fig. 4 or Fig. 5, converter 40 has the phase element that does not illustrate in the drawings.This equipment comprises other parts that are used to compensate 48,49, and the latter has retaining element with the power semiconductor 50,51 that can insert or control and similarly be connected with transfer wire 41.The passive assembly of the parts 48,49 that are used to compensate can be made up of the combination in any of coil, capacitor, resistance and discharger and/or same discrete component.For example, for parts 49 resistance is installed and is had advantage, thereby realized being used to eliminate the access of the active power overshoot on transfer wire 41 or the damping resistance of control.This active power overshoot may disconnection be connected on the transfer wire 41 load or
Cause the overvoltage that is harmful to during equipment.
What have advantage is that parts 49 have at least one discharger.Can realize that by this discharger setting correspondent voltage reduces.Being connected of the transfer wire 41 of converter 40 and the parts 48,49 that are used to compensate and leggy, can be by transformer 47 or by impedance or directly carry out.This compensation and control element itself are known as FACTS.In the equipment of the present invention shown here, will be linked on one's own initiative on the transfer wire 41 at the alternating current that converter 40 is produced.At this,, make and the signal that is coupled into can be adapted according to careful classification and transmission requirement according to transmission requirement control converter 40.For example also can adopting, the mechanical switch of power switch replaces power semiconductor 50,51.At this, by having realized known FACTS itself according to equipment of the present invention, for example static synchronous compensator (STATCOM), the unified power flow controller (UPFC) under the situation that is coupled in series to static series compensator (S3C) synchronously under the situation of transfer wire or and series coupled in parallel in combination.
In the equipment shown in Fig. 1, Fig. 4, Fig. 5 and Fig. 6, within the scope of the invention, different with the transfer wire 41 of shown three phase place AC network or three phase places, also can be connected with the AC network or the transfer wire of single-phase, quarter-phase or leggy by means of each suitable jockey.
In addition, within the scope of the invention, connect 1 except the parallel circuits of the phase element that illustrates in the drawings, also have the switch element that is connected in series according to Fig. 4 according to the high pressure of Fig. 1 is short.By adopting the direct current lead that between converter, extends to obtain
Equipment.
Equipment and short connection can be expressed as within the scope of the invention more than two converters, and therefore are suitable for the multiple terminals operation.Transfer wire between the converter is for example realized as cable or by gas isolated transfer wire.Direct connection by converter can obtain described short the connection.
The circuit arrangement shown in Fig. 19,9 ' capacitor, according to the capacitor 26 of Fig. 2 and Fig. 3, according to the capacitor 33,34,35 of Fig. 4 and the capacitor that comprises capacitor 52 of Fig. 6, can at random make up with for example energy accumulator of flywheel, super capacitor or the like, perhaps can substitute by these energy accumulators.For this reason, with energy accumulator and described capacitor is provided with in parallel or substitute described capacitor.The layout that energy accumulator is concentrated on the space in the public parts (for example at circuit arrangement 9) and the layout (that is spatial distributions on different parts) of distribution all are possible.
Reference numerals list
1 short the connection
2,3 AC networks
4 first current transformers
5,5 ' direct current connects
6 second current transformers
7,7 ' parallel branch
8 parallel branches connect
9,9 ' circuit arrangement
10,11,12 phase elements
10a...10i switch element
11a...11i switch element
12a...12i switch element
10a ' ... 10i ' switch element
11a ' ... 11i ' switch element
12a ' ... 12i ' switch element
13,14,15 phase elements
13a...13i switch element
14a...14i switch element
15a...15i switch element
13a ' ... 13i ' switch element
14a ' ... 14i ' switch element
15a ' ... 15i ' switch element
16,16 ' voltage changer
17,17 ' power pack
18,19 regulons
20,21 joints
22,23 power semiconductors
24,25 diodes
26 capacitors
27,28,29 phase elements
30,31,32 phase place joints
33,34,35 capacitors
36,37,38 coils
36 ', 37 ', 38 ' coil
39 are used for the system of electric energy transmitting
40 converters
41 transfer wires
42 energy storing devices
43 control and regulons
44 current measuring units
45 voltage measurement units
46 coils
47 transformers
48,49 parts that are used to compensate
50,51 controllable silicons
52 capacitors
Claims (21)
1. equipment (1,39) that is used for electric energy transmitting, this equipment comprises at least one converter (4,6,40), wherein, each converter (4,6,40) has and has at least one respectively by switch element (10a...10i, 11a...11i, 12a...12i, 13a...13i, 14a...14i, 15a...15i, 10a ' ... 10i ', 11a ' ... 11i ', 12a ' ... 12i ') phase element of the series circuit of Zu Chenging (10,11,12,13,14,15,27,28,29), these switch elements comprise at least two power semiconductors that can disconnect (22,23) and at least two idle running diodes (24 in parallel with described power semiconductor respectively respectively, 25) and energy storing device (26)
It is characterized in that: described phase element (27,28,29) has the parallel branch (7 of at least two connections parallel with one another respectively, 7 '), described parallel branch has switch element (10a...10i, 11a...11i, 12a...12i respectively, 13a...13i, 14a...14i, 15a...15i, 10a ' ... 10i ', 11a ' ... 11i ', 12a ' ... 12i ') series circuit.
2. equipment (1 according to claim 1,39), it is characterized in that, each parallel branch has the described switch element of even number, wherein, is used for each described phase element (27,28,29) be connected to the centre that joint (30,31,32) on load or the transmission network is connected this parallel branch.
3. equipment according to claim 1 and 2 (1,39) is characterized in that, a plurality of phase elements of converter (27,28,29) connection parallel with one another.
4. equipment according to claim 1 and 2 (1,39) is characterized in that, a plurality of phase elements (27,28,29) are connected in series mutually.
5. according to each described equipment (1,39) in the claim 1 to 4, it is characterized in that, energy storing device (33,34,35) is set in parallel with described phase element (27,28,29).
6. according to each described equipment (1,39) in the claim 1 to 5, it is characterized in that each phase element (10,11,12,13,14,15,27,28,29) has at least one impedance (36,37,38,36 ', 37 ', 38 '), perhaps by an impedance (36,37,38,36 ', 37 ', 38 ') be connected with another phase element.
7. according to each described equipment (1,39) in the claim 1 to 6, it is characterized in that at least one converter (4,6,40) can be connected in parallel with transmission network (41) or with direct current lead (5).
8. according to each described equipment (1,39) in the claim 1 to 7, it is characterized in that at least one converter (4,6,40) can be connected in series with transmission network (41) or with direct current lead (5).
9. according to each described equipment (1,39) in the claim 1 to 8, it is characterized in that each converter is connected with direct voltage source.
10. equipment according to claim 9 (1,39) is characterized in that, described direct voltage source is the converter of rectification.
11., it is characterized in that the converter of described rectification is connected with at least two converters according to each described equipment (1,39) in the claim 1 to 10.
12., it is characterized in that described converter directly interconnects according to each described equipment (1,39) in the claim 9 to 11 under the condition that constitutes short connection.
13., it is characterized in that described converter interconnects by means of direct current lead (5) according to each described equipment (1,39) in the claim 9 to 11.
14. equipment according to claim 13 (1,39) is characterized in that, described direct current lead (5) is one pole or bipolar.
15., it is characterized in that described direct current lead (5) is gas isolated transfer wire, cable and/or overhead wire at least in part according to claim 13 or 14 described equipment (1,39).
16., it is characterized in that described direct current lead (5) is impedance according to each described equipment (1,39) in the claim 13 to 15.
17., it is characterized in that one of described converter (4,6,40) has the power semiconductor of line commutated according to each described equipment (1,39) in the claim 1 to 16.
18., it is characterized in that described switch element another diode at least that is connected in parallel according to each described equipment (1,39) in the claim 1 to 17.
19., it is characterized in that described energy storing device is capacitor (9,9 ', 26,33,34,35,52) at least in part according to each described equipment (1,39) in the claim 1 to 18.
20., it is characterized in that at least two parallel branches (7,7 ') interconnect by means of Transformer Winding (30,31,32) according to each described equipment in the claim 1 to 19.
21., it is characterized in that at least two parallel branches (7,7 ') connect (8) by parallel branch and connect on electric current ground mutually according to each described equipment in the claim 1 to 20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005800515295A CN101258671A (en) | 2005-09-09 | 2005-09-09 | Equipment used for transferring electric energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005800515295A CN101258671A (en) | 2005-09-09 | 2005-09-09 | Equipment used for transferring electric energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101258671A true CN101258671A (en) | 2008-09-03 |
Family
ID=39892325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005800515295A Pending CN101258671A (en) | 2005-09-09 | 2005-09-09 | Equipment used for transferring electric energy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101258671A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741094B (en) * | 2010-01-25 | 2013-02-27 | 株洲变流技术国家工程研究中心有限公司 | Turn-off device-based mobile power transmission device |
| CN102460933B (en) * | 2009-06-22 | 2014-12-31 | 阿尔斯通技术有限公司 | Converter |
| CN105098813A (en) * | 2014-05-13 | 2015-11-25 | Ls产电株式会社 | High voltage direct current transmission system |
| CN105098817A (en) * | 2014-05-13 | 2015-11-25 | Ls产电株式会社 | Deviation compensation method of potential transformer |
| CN105098815A (en) * | 2014-05-13 | 2015-11-25 | Ls产电株式会社 | Deviation compensation method of potential transformer |
| CN105098818A (en) * | 2014-05-13 | 2015-11-25 | Ls产电株式会社 | Deviation compensation method of potential transformer |
| CN105359403A (en) * | 2013-05-03 | 2016-02-24 | 阿尔斯通技术有限公司 | Converter |
| CN105450045A (en) * | 2015-12-15 | 2016-03-30 | 清华大学 | Diagonal bridge sub-module-based modular multi-level converter |
-
2005
- 2005-09-09 CN CNA2005800515295A patent/CN101258671A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102460933B (en) * | 2009-06-22 | 2014-12-31 | 阿尔斯通技术有限公司 | Converter |
| CN101741094B (en) * | 2010-01-25 | 2013-02-27 | 株洲变流技术国家工程研究中心有限公司 | Turn-off device-based mobile power transmission device |
| CN105359403A (en) * | 2013-05-03 | 2016-02-24 | 阿尔斯通技术有限公司 | Converter |
| CN105359403B (en) * | 2013-05-03 | 2018-02-23 | 通用电气技术有限公司 | Converter |
| US9654018B2 (en) | 2014-05-13 | 2017-05-16 | Lsis Co., Ltd. | Deviation compensation method of potential transformer |
| CN105098818A (en) * | 2014-05-13 | 2015-11-25 | Ls产电株式会社 | Deviation compensation method of potential transformer |
| CN105098815A (en) * | 2014-05-13 | 2015-11-25 | Ls产电株式会社 | Deviation compensation method of potential transformer |
| CN105098817A (en) * | 2014-05-13 | 2015-11-25 | Ls产电株式会社 | Deviation compensation method of potential transformer |
| CN105098813B (en) * | 2014-05-13 | 2017-11-24 | Ls产电株式会社 | HVDC transmission system |
| US9853558B2 (en) | 2014-05-13 | 2017-12-26 | Lsis Co., Ltd. | High voltage direct current (HVDC) transmission system to compensate for voltage values output from a plurality of potential transformers |
| US9866137B2 (en) | 2014-05-13 | 2018-01-09 | Lsis Co., Ltd. | Deviation compensation method of potential transformer |
| CN105098818B (en) * | 2014-05-13 | 2018-01-26 | Ls产电株式会社 | A kind of deviation compensation method of voltage transformer |
| CN105098813A (en) * | 2014-05-13 | 2015-11-25 | Ls产电株式会社 | High voltage direct current transmission system |
| CN105098817B (en) * | 2014-05-13 | 2018-10-16 | Ls产电株式会社 | The deviation compensation method of voltage transformer |
| CN105450045A (en) * | 2015-12-15 | 2016-03-30 | 清华大学 | Diagonal bridge sub-module-based modular multi-level converter |
| CN105450045B (en) * | 2015-12-15 | 2018-02-02 | 清华大学 | A kind of modular multi-level converter based on diagonal bridge submodule |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101258670A (en) | Equipment used for transferring electric energy | |
| US7969755B2 (en) | Apparatus for electrical power transmission | |
| US10811988B2 (en) | Power management utilizing synchronous common coupling | |
| US8553433B2 (en) | DC voltage compensation in a multi-terminal HVDC power transmission network | |
| US10608545B2 (en) | Power management utilizing synchronous common coupling | |
| US20080252142A1 (en) | Apparatus for Electrical Power Transmission | |
| CN102474101B (en) | There is the device for changing electric parameter of star neutral reactor | |
| CN101258671A (en) | Equipment used for transferring electric energy | |
| KR101361865B1 (en) | Power flow control in a meshed hvdc power transmission network | |
| CN110247418B (en) | AC/DC hybrid power distribution network based on flexible multi-state switch and control test method | |
| Haghi et al. | Control and stability analysis of VSC-HVDC based transmission system connected to offshore wind farm | |
| CN103199691A (en) | Zero power starting method of thermal generator set with high-voltage direct-current transmission system | |
| WO2018060129A1 (en) | A power converter system for power quality compensation and load balancing connected to an electric power distribution grid | |
| CN115173422B (en) | Interconnection type power supply transformer and regulation and control method thereof | |
| Zhu et al. | Requirements for smart transformer | |
| CN110352554A (en) | Power converter for energy system | |
| Stamatiou et al. | Decentralized converter controller for multiterminal HVDC grids | |
| Shrivastava et al. | Overview strategy of wind farm in VSC-HVDC power transmission | |
| CN208369224U (en) | Bidirectional, dc transmission system is pressed in one kind | |
| EP4184740A1 (en) | Electrical assembly for reactive power compensation | |
| CN113410863A (en) | Direct current grid-connected system with variable boosting | |
| Ma et al. | Hierarchical control and experimental verification of a novel DC substation | |
| CN117578486A (en) | Multi-feeder voltage regulating circuit and method for power distribution network | |
| CN117480702A (en) | Energy support device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080903 |