CN201616677U - Turn-off component based mobile power transmission device - Google Patents
Turn-off component based mobile power transmission device Download PDFInfo
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- CN201616677U CN201616677U CN 201020100232 CN201020100232U CN201616677U CN 201616677 U CN201616677 U CN 201616677U CN 201020100232 CN201020100232 CN 201020100232 CN 201020100232 U CN201020100232 U CN 201020100232U CN 201616677 U CN201616677 U CN 201616677U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
A turn-off component based mobile power transmission device comprises two groups of mutually independent high-voltage convertor stations which are combined in parallel via DC sides in a back-to-back connected manner and respectively serve as the sending terminal and the receiving terminal of DC electric transmission, wherein the sending terminal is connected with the three-phase alternating current output terminal of a power network, and the receiving terminal is connected with an active power network or a passive power network as required by the electric transmission. The electric transmission method adopts a two-layer control mode including upper layer control and lower layer unit control, wherein the upper layer control mainly coordinates the control objectives of a plurality of current transformer power units and system protection, and the lower layer unit controls and completes the real-time control and protection of the power units. The mobile electric transmission device has the characteristics of small size, high efficiency, flexible control, etc., expands the operating range of the device, improves the utilization ratio of the device, and meanwhile greatly enhances the power quality.
Description
Technical field
The utility model relates to a kind of power transmitting device, especially a kind of mobile power transmission device that is applied to the power transmission and transformation field based on turn-off device, this power transmitting device also can be used for the dispersed regenerative resource of small-scale (as wind-force, solar energy etc.) generating field is incorporated into the power networks, the sensitive load power supply, city load center power supply, offshore drilling platform power supply, isolated island power supply.
Background technology
Along with the energetically development and utilization of country for renewable and clean energy resource, continuing to optimize of energy resource structure, be accompanied by the continuous expansion of renewable energy utilization scales such as wind energy, solar energy, its intrinsic dispersiveness, small-sized property, constantly display away from characteristics such as load centers.Adopt traditional technology of transmission of electricity then to bring scale of investment big, a series of unfavorable factors such as power transmission efficiency is low.On the other hand, Semiconductor Converting Technology is a key technology of building resource-conserving and friendly environment society.Technology of transmission of electricity based on Semiconductor Converting Technology has small-sized, efficient, control flexible characteristic, and the economic benefit and the value of environmental protection are considerable, can effectively reduce landing of transmission line voltage and flickering, have improved the quality of power supply.
Following two kinds of schemes are arranged in the existing technology of transmission of electricity:
(1) traditional ac transmission technology, this kind mode adopt the form that exchanges the aerial condutor transmission, require all synchronous generators in the AC electric power systems must guarantee synchronous operation, and the stability of system can not get abundant assurance; During with two of AC power line connections and above AC system, capacity of short circuit increases, even needs to change circuit breaker or set up current-limiting apparatus; When not having sky, underloading, exchange long line receiving end and middle part the phenomenon that electric voltage exception raises takes place easily, need the parallel reactance compensation; Be three-way conveying owing to exchange, circuit cost height, year energy loss rate are big, and are easy to generate a large amount of induction reactance and the reactive loss of capacitive reactance.
(2) based on the current source converter (csc) type direct current transportation technology of thyristor, this kind mode can only be operated in the active inversion state, and receiving-end system must have enough big capacity of short circuit, otherwise commutation failure takes place easily; The harmonic number that converter produces is low, capacity is big; Converter need absorb a large amount of reactive powers needs a large amount of filtering and reactive power compensator; The current conversion station floor space is big, investment is big.
And it is professional very strong based on the technology of transmission of electricity of turn-off device, four-quadrant technology of transmission of electricity for active power and reactive power did not then also occur, can only see the independent active power of carrying out in the present through engineering approaches implementation process and transmit or the independent technology of transmission of electricity of carrying out reactive power compensation, as in October, 2002 U.S. SDG﹠amp; E (San Diego Gas﹠amp; Electric) 138kV that Talega power station is delivered for use, ± 100Mvar STATCOM device.Simultaneously for satisfy energy dispersiveness, small-sized property, away from requirements such as load centers, portable power transmitting device have mobile strong, job area is wide, the utilization ratio of device advantages of higher.Thereby this kind is very wide based on the application prospect of the mobile power transmission device of turn-off device.
HVDC (high voltage direct current) technology of transmission of electricity of a new generation, it is the voltage source converter (VSC) that constitutes based on full-control type, turn-off device, make the VSC-HVDC transmission system possess the ability that its transmission active power and reactive power are controlled simultaneously, and can realize exchanging numerous advantages such as passive network power supply.Figure 1 shows that two ends connect flexible DC power transmission system capital equipment and system's formation schematic diagram of active AC network, the capital equipment of VSC current conversion station has full control converter, direct current capacitor, commutating reactor, alternating current filter and converter transformer etc.
The utility model content
The purpose of this utility model is to provide a kind of mobile power transmission device based on turn-off device at the deficiency of existing power transmitting device, to reach the purpose to the power supply of island load point high efficient and reliable.
A kind of mobile power transmission device based on turn-off device that the utility model provides is realized by following technical proposals:
A kind of mobile power transmission device based on turn-off device comprises two groups of separate high-voltage convertor stations, and two groups of high-voltage convertor stations adopt back-to-back connection mode by the DC side series combination together, respectively as the transmitting terminal and the receiving terminal of direct current transportation; Wherein transmitting terminal connects the three-phase alternating current output of electrical network, and alternating current is converted into the direct current transmission, and receiving terminal then requires that according to transmission of electricity the direct current that transmitting terminal transmits is converted into alternating current and sends into active electrical network or passive electrical network.
As the further execution mode of the utility model, high-voltage convertor station comprises phase shifting transformer and is no less than the combination of two power cell, described power cell is realized the mutual conversion of interchange and direct current, shift to the former edge joint high-voltage alternating of transformer electrical network, shifting to the transformer secondary is many winding outputs, connect each power cell AC side respectively, the power cell DC side is exported high voltage direct current by series system.
As the further execution mode of the utility model, described power cell comprises the three-phase two level brachium pontis of 6 IGBT, the AC side capacitive filter, the AC side low tension reactor, dc bus capacitor, the DC side discharge resistance, three-phase two level brachium pontis exchange side joint AC side low tension reactor, shift to transformer secondary winding by connecing after the filtering of AC side capacitive filter again, DC side parallel electric capacity, DC side discharge resistance, and IGBT VT7, the copped wave brachium pontis that diode D1 constitutes is connected in parallel on the DC side of power cell.
As the further execution mode of the utility model, described mobile power transmission device comprises upper strata controller and lower floor's power cell controller, and it is the controlled target and the system protection of a plurality of power cells of controller coordinate at the middle and upper levels; Lower floor's power cell controller is finished the real-time control and the protection of power cell.
As the further execution mode of the utility model, communication is carried out in described upper strata controller and power-management centre, accepts the dispatch command such as power, voltage of power-management centre, sends the real-time waveform data and the fault data recorder of current conversion station simultaneously; Carry out communication with lower floor power cell controller, send to lower floor's power cell controller electric current, voltage, power instruction, and the AC side output phase angle in passive load when control is given, receives the fault-signal and the real-time data record of lower floor's power cell controller.
As the further execution mode of the utility model, described lower floor power cell controller is mainly realized the real-time control of single power cell, comprise outer voltage controller and current inner loop controller, wherein the outer voltage controller is realized the power control of power cell, comprise active power control and Reactive Power Control, the current inner loop controller carries out Current Control according to the current-order of outer voltage output.
As the further execution mode of the utility model, described lower floor power cell controller comprises dc voltage controller, direct current controller and direct current power controller, realizes the control of active power.
As the further execution mode of the utility model, described lower floor power cell controller comprises reactive power controller and alternating voltage controller, realizes the control of reactive power.
As the further execution mode of the utility model, described lower floor power cell controller comprises transmitting terminal power cell controller and receiving terminal power cell controller, transmitting terminal power cell controller comprises dc voltage controller, alternating voltage controller and reactive power controller, dc voltage controller, alternating voltage controller and reactive power controller are according to actual value that collects and the given command signal that receives, by current inner loop controller power controlling unit; Receiving terminal power cell controller comprises direct current controller, direct current power controller and alternating voltage controller, direct current controller, direct current power controller and alternating voltage controller are according to the actual value that collects and receive given command signal, by current inner loop controller power controlling unit.
Above-described execution mode mesohigh current conversion station all can be installed in the container car and can move.By using the described power transmitting device of the utility model, mobile power transmission device based on turn-off device has characteristics such as small-sized, efficient, that control is flexible, both can connect the be incorporated into the power networks transmission of electricity and sensitive load powered of two active electrical networks, also can realize docking of active electrical network and passive electrical network, thereby realize island load point is powered.Adopt the container car form also to realize the mobility of power transmitting device, improved the job area and the utilization rate of equipment and installations of installing.The floor space of whole device is about with 20% of traditional direct current transportation of capacity, and power transmission efficiency is compared and exchanged the aerial condutor transmission of electricity and will exceed approximately 50%, by the Digital Control of convertor assembly to output electric energy waveform, has improved the quality of power supply greatly.
Power transmitting device provided by the utility model not only can be realized conventional transmission of electricity, and because the independent decoupling zero control of active power and reactive power can be satisfied the specific (special) requirements of other transmission of electricity: as realize interconnected, the power supply, STATCOM (Static Var Compensator---static synchronous reactive-load compensator) etc. of asynchronous operation electrical network to passive electrical network.
Description of drawings
Fig. 1 is the DC transmission system structural representation that the prior art two ends connect active AC network;
Fig. 2 is the system schematic of a kind of exemplary embodiment of the utility model;
Fig. 3 is the power cell topological structure of a kind of exemplary embodiment of the utility model and connects into transmission of electricity high-voltage convertor station schematic diagram;
Fig. 4 is system's control block diagram of a kind of exemplary embodiment of the utility model;
Fig. 5 is a dc voltage controller in the described controlling schemes of Fig. 4;
Fig. 6 is a direct current controller in the described controlling schemes of Fig. 4;
Fig. 7 is a direct current power controller in the described controlling schemes of Fig. 4;
Fig. 8 is a reactive power controller in the described controlling schemes of Fig. 4;
Fig. 9 is an alternating voltage controller in the described controlling schemes of Fig. 4;
Figure 10 is a current inner loop controller in the described controlling schemes of Fig. 4;
Wherein: 1-high-voltage convertor station one, 2-phase shifting transformer one, 3-power cell one, 4-lower floor power cell controller, 5-upper strata controller, 6-module one, 7-module two, 1 '-high-voltage convertor station two, 2 '-phase shifting transformer two, 3 '-power cell two, 6 '-module three, 7 '-module four, R1-resistance, C1～C2-electric capacity, VT1～VT7-IGBT, the D1-diode, PT-voltage sensor, CT-current sensor.
Embodiment:
Accompanying drawing has provided specific embodiment of the utility model, below will the utility model will be further described by drawings and Examples.
As shown in Figure 2, for structure based on the mobile power transmission device of turn-off device, comprise two groups of separate high-voltage convertor stations (shown in label among Fig. 21 and 1 ' part), two groups of current conversion stations adopt back-to-back connection mode to combine by DC side parallel, respectively as transmitting terminal of direct current transportation (claim to make a start not only) and receiving terminal (but also claiming receiving end).Every group of high-voltage convertor station comprises that again the module of pair of series is (as label among Fig. 26,7,6 ', 7 ' shown in), each module is made up of phase shifting transformer (shown in label among Fig. 22 and 2 ' part) and several power cells (shown in label among Fig. 23 and 3 ' part).Every group of high-voltage convertor station can integratedly be assembled in and constitute packaged type transmission of electricity car in the locomotive container.
As shown in Figure 3, high-voltage convertor station is that combination and phase shifting transformer by a plurality of power cells constitutes.Power cell main circuit shown in label among Fig. 23 and 3 ' part part is mainly by full control power electronic device three-phase two level brachium pontis, the copped wave brachium pontis, and the AC side low tension reactor, the AC side filter capacitor, dc bus capacitor, the DC side discharge resistance constitutes.Power cell physical circuit topology as shown in Figure 3, (the three-phase brachium pontis of VT1～VT6) constitute, three-phase brachium pontis AC side meets three-phase low tension reactor L1, again by connecing transformer secondary winding after the three phase capacitance C1 filtering for 6 IGBT.Power cell DC side parallel capacitor C 2 and discharge resistance R1, and VT7, the copped wave brachium pontis that D1 constitutes.The anodal Ud+ of power cell DC side connects a power cell DC side negative pole Ud-when transmission of electricity, and Ud-meets next power cell Ud+, realizes the power unit cascade of DC side, joins to constituting the high voltage direct current source.
Wherein the phase shifting transformer secondary is many winding outputs, connects each power cell AC side respectively, the former edge joint high-voltage alternating of transformer electrical network.Transformer is realized the mutual conversion of AC network high pressure and power cell low pressure.
Every group of current conversion station control system is made up of the cell controller of upper strata controller and each power cell inside: lower floor's cell controller is finished the unity power factor voltage stabilizing control and the protection of power cell; the upper strata controller is finished constant current chopper control and system protection, and the control system block diagram as shown in Figure 4.The control procedure of system is: upper strata controller 5 collects and after transducers such as voltage, electric current are caught next data data is calculated and handled, according to the needs of system and send to definiteness to several unit controls of lower floor and make signal control in real time, lower floor's power cell controller 4 receives given command signal u
Dc *, i
Dc *, P
Dc *, Q
*, u
Sm *After, outer voltage is carried out power control back output current reference instruction i respectively
d *, i
q *After the current inner loop controller receives the current reference instruction, electric current is controlled, produced pwm pulse signal and realize control, reach the purpose of controlling the meritorious and reactive power of stable state respectively the IGBT in the power cell thereby output voltage control signal carries out PWM carrier wave misphase modulation.Wherein in the power cell controller of transmitting terminal, dc voltage controller is adopted in active power control, and in order to satisfy different transmission of electricity situations, visual concrete applicable cases is selected alternating voltage controller or reactive power controller to Reactive Power Control; In the power cell controller of receiving terminal, can select direct current power controller or direct current controller to active power control, Reactive Power Control adopts the alternating voltage controller.
Wherein, therefore must design the controlled target that a upper strata controller is coordinated each power cell of lower floor because the used current conversion station of the utility model adopts a plurality of power cell carrier wave misphases to control and realizes.Upper strata controller institute major function is to finish and the communication at electric power debugging center, communication, system protection and precharge control with lower floor's power cell.Lower floor's power cell controller is realized the real-time control of single power model, all adopts the dicyclo control mode of outer voltage and current inner loop usually.Wherein outer voltage realizes the power control of power cell, comprises active power control and Reactive Power Control.Current inner loop is carried out Current Control according to the current-order of outer voltage output.For the three-phase alternating current symmetrical system, suppose and only consider to exchange fundametal compoment that then the dq component in the stable state dqo model is the direct current variable.Overlap with electrical network electromotive force vector by the d axle initial reference direction of principal axis of choosing synchronous rotating frame, the AC system A phase phase voltage starting phase angle that is current transformer is 0 degree, then the d shaft current is represented the real component of electric current, and the q shaft current is represented the idle component of electric current, by controlling i respectively
dAnd i
qJust can reach the purpose of the meritorious and reactive power of control stable state.
In the outer ring controller of direct voltage as shown in Figure 5, u among the figure
Dc, u
Dc *, Δ u
Dc, i
Dc *Be respectively direct voltage actual value, direct voltage set-point, direct current voltage error value and direct current set-point.Direct voltage u
DcWith direct voltage reference value u
Dc *Departure Δ u
DcBe converted to alternating current real component i through the PI link
dCorrection i
D1, provide i by power feedforward link
dPre-appraisal i
D0, both sums have constituted the given reference value i of the real component of the meritorious input current of power cell
d *Thereby, remove the direct voltage of power controlling unit.If the controlled quentity controlled variable i of power cell
d *Only be stable state discreet value i
D0, then power cell voltage open loop operation, direct voltage is no longer kept constant but is fluctuateed along with the variation of burden with power load or burden without work at this moment.
In the outer ring controller of direct current as shown in Figure 6, i among the figure
Dc, i
Dc *, u
Dc *, u
Dc, Δ i
DcBe respectively direct current actual value, direct current set-point, direct voltage set-point and direct current actual value.Direct current i
DcWith direct voltage reference value i
Dc *Departure Δ i
DcBe converted to alternating current real component i through the PI link
dCorrection i
D1, provide i by power feedforward link
dPre-appraisal i
D0, both sums have constituted the given reference value i of the real component of the meritorious input current of power cell
d *Thereby, remove the direct voltage of power controlling unit.If the controlled quentity controlled variable i of power cell
d *Only be stable state discreet value i
D0, then power cell open current loop operation, direct current is no longer kept constant but is fluctuateed along with the variation of burden with power load or burden without work at this moment.
In the outer ring controller of direct current power as shown in Figure 7, u among the figure
Dc, i
Dc, P
Dc *, Δ P is respectively direct current actual value, direct current actual value, direct current power set-point and direct current power error.Direct voltage u
DcWith direct current i
DcMultiply each other and obtain the actual value P of direct current power
Dc, direct current power departure Δ P is converted to alternating current real component i through the PI link
dGiven reference value i
d *Thereby, the direct current power of going to the power controlling unit.
In the outer ring controller of reactive power as shown in Figure 8, Q, Q among the figure
*, Δ Q is respectively the actual reactive power of power cell, reactive power set-point and reactive power error amount.Reactive power departure Δ Q is converted to alternating current real component i through the PI link
qGiven reference value i
q *Thereby, the reactive power of going to the power controlling unit.
In the outer ring controller of alternating voltage as shown in Figure 9, u among the figure
Sm, u
Sm *, Δ u
SmBe respectively power cell alternating voltage actual value, alternating voltage set-point and alternating voltage error amount.Signal u wherein
Sm, u
Sm *Obtain from the upper strata controller.Alternating voltage departure Δ u
SmBe converted to alternating current idle component i through the PI link
qGiven reference value i
qThereby, remove the alternating voltage of the AC side of power controlling unit.
The current inner loop controller as shown in figure 10, with current i
d, i
qRespectively with set-point i
d *, i
q *(=0) compares and carries out utilizing the feedforward decoupling algorithm after the PI control, obtains the dq component of power cell modulation voltage.Pass through u
DqAnd the resulting phase signal of phase-locked loop, just can carry out three-phase SPWM modulation or SVPWM modulation, obtain the start pulse signal of the IGBT element of power cell.
Though described execution mode of the present utility model in conjunction with the accompanying drawings, those of ordinary skill in the art can make various distortion or modification within the scope of the appended claims.
Claims (10)
1. mobile power transmission device based on turn-off device, it is characterized in that: comprise two groups of separate high-voltage convertor stations, two groups of high-voltage convertor stations adopt back-to-back connection mode to combine by DC side parallel, respectively as the transmitting terminal and the receiving terminal of direct current transportation; Wherein transmitting terminal connects the three-phase alternating current output of electrical network, and alternating current is converted into the direct current transmission, and receiving terminal then requires that according to transmission of electricity the direct current that transmitting terminal transmits is converted into alternating current and sends into active electrical network or passive electrical network.
2. a kind of mobile power transmission device according to claim 1 based on turn-off device, it is characterized in that: high-voltage convertor station comprises phase shifting transformer and is no less than the combination of two power cell, described power cell is realized the mutual conversion of interchange and direct current, the former edge joint high-voltage alternating of phase shifting transformer electrical network, the phase shifting transformer secondary is many winding outputs, connect each power cell AC side respectively, the power cell DC side is exported high voltage direct current by series system.
3. a kind of mobile power transmission device according to claim 2 based on turn-off device, it is characterized in that: described power cell comprises the three-phase two level brachium pontis of 6 IGBT, the AC side capacitive filter, the AC side low tension reactor, dc bus capacitor, the DC side discharge resistance, three-phase two level brachium pontis exchange side joint AC side low tension reactor, shift to transformer secondary winding by connecing after the filtering of AC side capacitive filter again, DC side parallel electric capacity, the DC side discharge resistance, and IGBT (VT7), the copped wave brachium pontis that diode (D1) constitutes is connected in parallel on the DC side of power cell.
4. a kind of mobile power transmission device according to claim 3 based on turn-off device; it is characterized in that: described mobile power transmission device comprises upper strata controller and lower floor's power cell controller; the upper strata controller links to each other with lower floor power cell controller; it is the controlled target and the system protection of a plurality of power cells of controller coordinate at the middle and upper levels, and lower floor's power cell controller is finished the real-time control and the protection of power cell.
5. a kind of mobile power transmission device according to claim 4 based on turn-off device, it is characterized in that: communication is carried out in described upper strata controller and power-management centre, accept power, the voltage dispatch command of power-management centre, send the real-time waveform data and the fault data recorder of current conversion station simultaneously; Carry out communication with lower floor power cell controller, send to lower floor's power cell controller electric current, voltage, power instruction, and the AC side output phase angle in passive load when control is given, receives the fault-signal and the real-time data record of lower floor's power cell controller.
6. according to claim 4 or 5 described a kind of mobile power transmission devices based on turn-off device, it is characterized in that: described lower floor power cell controller is mainly realized the real-time control of single power cell, comprise outer voltage controller and current inner loop controller, wherein the outer voltage controller is realized the power control of power cell, comprise active power control and Reactive Power Control, the current inner loop controller carries out Current Control according to the current-order of outer voltage output.
7. a kind of mobile power transmission device according to claim 6 based on turn-off device, it is characterized in that: described lower floor power cell controller comprises dc voltage controller, direct current controller and direct current power controller, realizes the control of active power.
8. a kind of mobile power transmission device based on turn-off device according to claim 7 is characterized in that: described lower floor power cell controller comprises reactive power controller and alternating voltage controller, realizes the control of reactive power.
9. according to claim 7 or 8 described a kind of mobile power transmission devices based on turn-off device, it is characterized in that: described lower floor's power cell controller (4) comprises transmitting terminal power cell controller and receiving terminal power cell controller, transmitting terminal power cell controller comprises dc voltage controller, alternating voltage controller and reactive power controller, dc voltage controller, alternating voltage controller and reactive power controller are according to actual value that collects and the given command signal that receives, by current inner loop controller power controlling unit; Receiving terminal power cell controller comprises direct current controller, direct current power controller and alternating voltage controller, direct current controller, direct current power controller and alternating voltage controller are according to the actual value that collects and receive given command signal, by current inner loop controller power controlling unit.
10. according to claim 7 or 8 described a kind of mobile power transmission devices based on turn-off device, it is characterized in that: described high-voltage convertor station is installed in the container car and can moves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020100232 CN201616677U (en) | 2010-01-25 | 2010-01-25 | Turn-off component based mobile power transmission device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020100232 CN201616677U (en) | 2010-01-25 | 2010-01-25 | Turn-off component based mobile power transmission device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253247A (en) * | 2011-06-22 | 2011-11-23 | 中国电力科学研究院 | Flexibly-expanded general experiment platform for modular multi-level current 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 |
| CN103633652A (en) * | 2012-08-27 | 2014-03-12 | 国家电网公司 | Subarea power grid interconnection system and method |
-
2010
- 2010-01-25 CN CN 201020100232 patent/CN201616677U/en not_active Expired - Lifetime
Cited By (4)
| 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 |
| CN102253247A (en) * | 2011-06-22 | 2011-11-23 | 中国电力科学研究院 | Flexibly-expanded general experiment platform for modular multi-level current converter |
| CN102253247B (en) * | 2011-06-22 | 2015-05-13 | 中国电力科学研究院 | Flexibly-expanded general experiment platform for modular multi-level current converter |
| CN103633652A (en) * | 2012-08-27 | 2014-03-12 | 国家电网公司 | Subarea power grid interconnection system and method |
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