CN203039365U - Interline power flow controller based on modularized multi-level transverter - Google Patents
Interline power flow controller based on modularized multi-level transverter Download PDFInfo
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- CN203039365U CN203039365U CN2012203748326U CN201220374832U CN203039365U CN 203039365 U CN203039365 U CN 203039365U CN 2012203748326 U CN2012203748326 U CN 2012203748326U CN 201220374832 U CN201220374832 U CN 201220374832U CN 203039365 U CN203039365 U CN 203039365U
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- 239000003990 capacitor Substances 0.000 claims description 7
- 238000013461 design Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 6
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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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
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model relates to an interline power flow controller based on a modularized multi-level transverter. The interline power flow controller comprises a static synchronous compensator (1) and a static synchronous series compensator (2). The static synchronous compensator (1) comprises a first transverter (7) and a shunt transformer (8). The static synchronous series compensator (2) comprises a second transverter (9) and a series transformer (10). The first transverter (7) is connected in an electric transmission line I in parallel through the shunt transformer (8). The second transverter (9) is connected in an electric transmission line II in series through the series transformer (10). A unified power flow controller comprises a by-pass switch (4), and the by-pass switch (4) is connected in parallel with the series transformer (10). The interline power flow controller avoids technological difficulties of device series connection, so individual phase control and modular design are easy. Through a redundancy, a trouble unit can be bypassed, and device operational reliability is improved. Device switching frequency is low, and device operational loss is low.
Description
Technical field
The utility model relates to flow controller between the line in a kind of flexible ac transmission field, is specifically related to a kind of based on flow controller between the line of modularization multi-level converter structure.
Background technology
Flow controller between line (IPFC) is that later development and the modern control technology of power application electronic technology realizes the parameter and the flexible of network configuration that exchange multi-thread transmission system are controlled fast.Its feature is exactly that its flexibility can adapt to the requirement that complication system carries out a series of compensation and trend control.It can finish independently comprehensive compensation of single circuit, the transmission of can also gaining merit between a plurality of circuits.
The IPFC device can be regarded as a STATCOM (STATCOM) device and constitutes at DC side parallel with a Static Series Synchronous Compensator (SSSC) device, it can be simultaneously and fast, active power and reactive power in the different circuits of independent control, thereby make IPFC have the four quadrant running function that STATCOM, SSSC device do not possess.
IPFC device main circuit topology is based on the mode of two voltage source converters (VSC) DC side parallel, wherein an AC side of converter is direct or in parallel with circuit in the system by transformer, and another AC side of converter is connected with another circuit in the system by transformer.Each voltage source converter is usually based on two level or three level three-phase voltage source converter structures.
Among the big capacity IPFC, voltage source converter improves the voltage endurance capability of device usually based on the mode that can turn-off power electronic device (typical device such as insulated gate bipolar transistor IGBT) series connection.The technological difficulties of turn-off device IGBT series connection mainly show: be subjected to the influence of technical monopoly, the IGBT device with self limiting short-circuit current characteristic is difficult to buying, and it is not deep enough that the control technology of IGBT series average-voltage is studied in theory.Be to reduce the device output harmonic wave, need be based on higher switching frequency, thereby the device running wastage is bigger, these have limited the application of big capacity IPFC.
The utility model content
At the deficiencies in the prior art, it is a kind of based on flow controller between the line of modularization multi-level converter structure that the utility model provides, flow controller has been evaded the technological difficulties of device series connection between this line, has following characteristics: be convenient to phase-splitting control and modularized design; But by redundant technique bypass trouble unit, improve the device operational reliability; And the devices switch frequency is low, and the device running wastage is little.
The purpose of this utility model is based on the following technical proposals realization:
A kind of based on flow controller between the line of modularization multi-level converter structure, its improvements are that flow controller comprises STATCOM 1 and Static Series Synchronous Compensator 2 between described line;
Described STATCOM 1 comprises first converter 7 and shunt transformer 8;
Described Static Series Synchronous Compensator 2 comprises second converter 9 and series transformer 10;
Described first converter 7 is by shunt transformer 8 in parallel accesses among the transmission line I; Described second converter 9 inserts among the transmission line II by series transformer 10 series connection.
Wherein, support electric capacity 3 is set between described STATCOM 1 and described Static Series Synchronous Compensator 2; Described support electric capacity 3 is in parallel with described STATCOM 1 and described Static Series Synchronous Compensator 2 respectively.
Wherein, described STATCOM 1 comprises first start-up circuit 5; Described first start-up circuit 5 is connected with the secondary of described shunt transformer 8, and the former limit of described shunt transformer 8 is in parallel with transmission line I.
Wherein, described first start-up circuit 5 comprises parallel resistor and switch.
Wherein, described Static Series Synchronous Compensator 2 comprises second start-up circuit 6; Described second start-up circuit, 6 one ends are connected with described second converter 9; Described second start-up circuit, 6 other ends are connected with described series transformer 10.
Wherein, described second start-up circuit 6 comprises parallel resistor and switch.
Wherein, described series transformer 10 connects among the load series connection access transmission line II.
Wherein, described first converter 7 is made of six brachium pontis of three-phase, and each brachium pontis comprises a reactor and N the submodule that structure is identical; An end is connected with described first start-up circuit 5 by reactor after the submodule cascade of each brachium pontis; Submodule one end of the cascade of two brachium pontis of the other end and other is connected, and forms the both positive and negative polarity bus of described first converter 7; Or
Described first converter 7 is made of six brachium pontis of three-phase, and each brachium pontis comprises a reactor and N the submodule that structure is identical; An end is connected with described first start-up circuit 5 after the submodule cascade of each brachium pontis, is connected with other reactor of two brachium pontis behind the other end series reactor, forms described first converter, 7 both positive and negative polarity buses.
Wherein, described second converter 9 is made of six brachium pontis of 3 phases, and each brachium pontis comprises 1 reactor and M the submodule that structure is identical; An end is connected with described series transformer 10 by reactor after the submodule cascade of each brachium pontis; Submodule one end of the cascade of two brachium pontis of the other end and other is connected, and forms described second converter, 9 both positive and negative polarity buses, is connected with the both positive and negative polarity bus of described first converter 7; Or
Described second converter 9 is made of six brachium pontis of 3 phases, and each brachium pontis comprises 1 reactor and M the submodule that structure is identical; An end is connected with described series transformer 10 after the submodule cascade of each brachium pontis; Be connected with other reactor of two brachium pontis behind the other end series reactor, form described second converter, 9 both positive and negative polarity buses, be connected with the both positive and negative polarity bus of described first converter 7.
Wherein, described submodule constitutes by half-bridge structure is in parallel with dc capacitor, and described half-bridge structure comprises the IGBT module of two series connection, and each IGBT module comprises antiparallel IGBT and diode;
Submodule bypass circuit in parallel between described half-bridge structure mid point and the IGBT emitter;
Described dc capacitor can power supply provides power supply for the control circuit of submodule by getting.
Compared with the prior art, the beneficial effect that reaches of the utility model is:
1, the utility model provide based on flow controller between the line of modularization multi-level converter structure, can significantly improve installed capacity, need not the IGBT device serial connection technology based on complexity;
2, the utility model provide based on flow controller between the line of modularization multi-level converter structure, can realize phase-splitting control;
3, the utility model provide based on flow controller between the line of modularization multi-level converter structure, can realize modularized design;
4, the utility model provide based on flow controller between the line of modularization multi-level converter structure, but by redundant technique bypass trouble unit, improve the device operational reliability, avoided device to withdraw from frequently and drop into;
5, the utility model provide based on flow controller between the line of modularization multi-level converter structure, be to reduce output harmonic wave, IGBT device tandem plan switching frequency is higher usually, the device loss is bigger; This programme is based on the modular multilevel technology, and the switching frequency of each device is lower, but can realize that external equivalent switching frequency is very high, reduces output harmonic wave, and it is less therefore to install running wastage.
Description of drawings
Fig. 1 be the utility model provide based on flow controller basic circuit structure figure between the line of modularization multi-level converter structure;
Fig. 2 is the structure chart based on flow controller main circuit scheme one between the line of modularization multi-level converter structure that the utility model provides;
Fig. 3 is the structure chart based on flow controller main circuit scheme two between the line of modularization multi-level converter structure that the utility model provides;
Fig. 4 is the structure chart based on flow controller submodule between the line of modularization multi-level converter structure that the utility model provides.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
The utility model provide based on flow controller basic circuit structure figure between the line of modularization multi-level converter structure as shown in Figure 1, comprise STATCOM 1 and Static Series Synchronous Compensator 2; STATCOM 1 comprises first converter 7 and shunt transformer 8; Static Series Synchronous Compensator 2 comprises second converter 9 and series transformer 10; First converter 7 is by shunt transformer 8 in parallel accesses among the transmission line I; Described second converter 9 inserts among the transmission line II by series transformer 10 series connection.
Present embodiment provides a kind of reversible type static compensator based on the modularization multi-level converter structure comprises STATCOM 1 and Static Series Synchronous Compensator 2 as shown in Figure 2; STATCOM 1 comprises first converter 7 and shunt transformer 8; Static Series Synchronous Compensator 2 comprises second converter 9 and series transformer 10;
Preferably, present embodiment arranges between described STATCOM 1 and described Static Series Synchronous Compensator 2 and supports electric capacity 3; The electric capacity 3 that supports in parallel between the positive and negative busbar of the positive and negative busbar of first converter 7 and second converter 9.Two current converters link to each other by the intermediate dc link that is made of support electric capacity 3, and active power can be carried out bi-directional between two current converters like this; Reactive power can exchange side at it by each current converter and exchange with system independently.
Preferably, the secondary of the shunt transformer 8 of the STATCOM 1 of present embodiment is connected with first start-up circuit 5, and the former limit of shunt transformer 8 is in parallel to be inserted among the transmission line I.Shunt transformer 8 is used for realizing the coupling of line voltage and STATCOM output voltage.
Preferably, the Static Series Synchronous Compensator 2 of present embodiment can also comprise that second start-up circuit, 6, the second start-up circuits 6 are made up of parallel resistor and switch.Second start-up circuit, 6 one ends are connected with second converter 9, and the other end is connected with series transformer 10 1 ends, and the series connection of series transformer 10 other ends inserts among the transmission line II.Second start-up circuit 6 can be realized 9 smooth startings of second converter.Series transformer 10 is used for realizing the coupling of line voltage and Static Series Synchronous Compensator output voltage.
Preferably, the THE UPFC of present embodiment also is provided with by-pass switch 4 for the safety setting, and by-pass switch 4 is in parallel with series transformer 10, is used for realizing withdrawing from of Static Series Synchronous Compensator.
The submodule of present embodiment is used for the output required voltage, the utility model provide based on the structure of flow controller submodule between the line of modularization multi-level converter structure as shown in Figure 4, it is made of half-bridge structure and dc capacitor, described half-bridge structure comprises the IGBT module of two series connection up and down, parallel connection direct electric capacity between last pipe IGBT collector electrode and the following pipe IGBT emitter, half-bridge structure mid point and following submodule bypass circuit in parallel between the pipe IGBT emitter, get can power supply from the direct current capacitor power taking, for the control circuit of submodule provides the control power supply.The dc capacitor of submodule is used for providing submodule voltage to support.During the submodule internal fault, its bypass circuit is used for making submodule out of service, realizes the redundancy running of STATCOM.Get and to be used for providing the control power supply to the submodule control circuit by power supply.Control circuit is used for realization to control, monitoring and the protection of submodule.The bypass circuit of present embodiment can be realized that control circuit can be realized by numeral or analog circuit by switch.Can power supply referenced patent 201010624225.6 or ZL201020700480.X realization but get.
Present embodiment is substantially the same manner as Example 1, but distinctive points is:
The position of the reactor in first converter 7 and second converter 9 is different.The reactor of present embodiment is connected on first converter 7 and second converter, 9 positive and negative busbar sides, as shown in Figure 3.It is used for suppressing the current converter output harmonic wave.
Concrete, first converter 7 is made of three-phase six brachium pontis, and each brachium pontis comprises a reactor and N the submodule that structure is identical; An end is connected with described first start-up circuit 5 after the submodule cascade of each brachium pontis, is connected with other reactor of two brachium pontis behind the other end series reactor, forms first converter, 7 both positive and negative polarity buses.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although with reference to above-described embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (10)
1. one kind based on flow controller between the line of modularization multi-level converter structure, it is characterized in that flow controller comprises STATCOM (1) and Static Series Synchronous Compensator (2) between described line;
Described STATCOM (1) comprises first converter (7) and shunt transformer (8);
Described Static Series Synchronous Compensator (2) comprises second converter (9) and series transformer (10);
Described first converter (7) inserts among the transmission line I by shunt transformer (8) is in parallel; Described second converter (9) inserts among the transmission line II by series transformer (10) series connection.
2. flow controller between line as claimed in claim 1 is characterized in that, arranges to support electric capacity (3) between described STATCOM (1) and described Static Series Synchronous Compensator (2); Described support electric capacity (3) is in parallel with described STATCOM (1) and described Static Series Synchronous Compensator (2) respectively.
3. flow controller between line as claimed in claim 1 is characterized in that, described STATCOM (1) comprises first start-up circuit (5); Described first start-up circuit (5) is connected with the secondary of described shunt transformer (8), and the former limit of described shunt transformer (8) is in parallel with transmission line I.
4. as flow controller between line as described in the claim 3, it is characterized in that described first start-up circuit (5) comprises parallel resistor and switch.
5. flow controller between line as claimed in claim 1 is characterized in that, described Static Series Synchronous Compensator (2) comprises second start-up circuit (6); Described second start-up circuit (6) one ends are connected with described second converter (9); Described second start-up circuit (6) other end is connected with described series transformer (10).
6. flow controller between line as claimed in claim 5 is characterized in that, described second start-up circuit (6) comprises parallel resistor and switch.
7. flow controller between line as claimed in claim 1 is characterized in that, described series transformer (10) connects the load series connection and inserts among the transmission line II.
8. flow controller between line as claimed in claim 1 is characterized in that, described first converter (7) is made of six brachium pontis of three-phase, and each brachium pontis comprises a reactor and N the submodule that structure is identical; An end is connected with described first start-up circuit (5) by reactor after the submodule cascade of each brachium pontis; Submodule one end of the cascade of two brachium pontis of the other end and other is connected, and forms the both positive and negative polarity bus of described first converter (7); Or
Described first converter (7) is made of six brachium pontis of three-phase, and each brachium pontis comprises a reactor and N the submodule that structure is identical; An end is connected with described first start-up circuit (5) after the submodule cascade of each brachium pontis, is connected with other reactor of two brachium pontis behind the other end series reactor, forms described first converter (7) both positive and negative polarity bus.
9. flow controller between line as claimed in claim 1 is characterized in that, described second converter (9) is made of six brachium pontis of 3 phases, and each brachium pontis comprises 1 reactor and M the submodule that structure is identical; An end is connected with described series transformer (10) by reactor after the submodule cascade of each brachium pontis; Submodule one end of the cascade of two brachium pontis of the other end and other is connected, and forms described second converter (9) both positive and negative polarity bus, is connected with the both positive and negative polarity bus of described first converter (7); Or
Described second converter (9) is made of six brachium pontis of 3 phases, and each brachium pontis comprises 1 reactor and M the submodule that structure is identical; An end is connected with described series transformer (10) after the submodule cascade of each brachium pontis; Be connected with other reactor of two brachium pontis behind the other end series reactor, form described second converter (9) both positive and negative polarity bus, be connected with the both positive and negative polarity bus of described first converter (7).
10. as flow controller between each described line among the claim 8-9, it is characterized in that, described submodule constitutes by half-bridge structure is in parallel with dc capacitor, and described half-bridge structure comprises the IGBT module of two series connection, and each IGBT module comprises antiparallel IGBT and diode;
Submodule bypass circuit in parallel between described half-bridge structure mid point and the IGBT emitter;
Described dc capacitor can power supply provides power supply for the control circuit of submodule by getting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203748326U CN203039365U (en) | 2012-07-13 | 2012-07-13 | Interline power flow controller based on modularized multi-level transverter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203748326U CN203039365U (en) | 2012-07-13 | 2012-07-13 | Interline power flow controller based on modularized multi-level transverter |
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| CN203039365U true CN203039365U (en) | 2013-07-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969708A (en) * | 2012-07-13 | 2013-03-13 | 中电普瑞科技有限公司 | Interline power flow controller based on modular multi-level converter structure |
| CN103954866A (en) * | 2014-05-09 | 2014-07-30 | 国家电网公司 | Testing circuit of half-bridge-structure voltage source current converter and modulation method thereof |
| CN104377720A (en) * | 2014-11-05 | 2015-02-25 | 无锡中汇汽车电子科技有限公司 | Direct-current transmission current control method based on MMC converter station |
| CN105870927A (en) * | 2016-03-14 | 2016-08-17 | 全球能源互联网研究院 | Unified power flow controller with multiple operational modes |
-
2012
- 2012-07-13 CN CN2012203748326U patent/CN203039365U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969708A (en) * | 2012-07-13 | 2013-03-13 | 中电普瑞科技有限公司 | Interline power flow controller based on modular multi-level converter structure |
| CN102969708B (en) * | 2012-07-13 | 2015-08-05 | 中电普瑞科技有限公司 | Flow controller between a kind of line based on modular multilevel converter structure |
| CN103954866A (en) * | 2014-05-09 | 2014-07-30 | 国家电网公司 | Testing circuit of half-bridge-structure voltage source current converter and modulation method thereof |
| CN103954866B (en) * | 2014-05-09 | 2017-04-05 | 国家电网公司 | A kind of hookup and its modulator approach of half-bridge structure voltage source converter |
| CN104377720A (en) * | 2014-11-05 | 2015-02-25 | 无锡中汇汽车电子科技有限公司 | Direct-current transmission current control method based on MMC converter station |
| CN105870927A (en) * | 2016-03-14 | 2016-08-17 | 全球能源互联网研究院 | Unified power flow controller with multiple operational modes |
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Granted publication date: 20130703 Termination date: 20200713 |
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| CF01 | Termination of patent right due to non-payment of annual fee |