CN104767227A - Novel bus power flow controller for smart distribution grid power transformation device - Google Patents
Novel bus power flow controller for smart distribution grid power transformation device Download PDFInfo
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- CN104767227A CN104767227A CN201510190605.6A CN201510190605A CN104767227A CN 104767227 A CN104767227 A CN 104767227A CN 201510190605 A CN201510190605 A CN 201510190605A CN 104767227 A CN104767227 A CN 104767227A
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- 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
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- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
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Abstract
The invention relates to a novel bus power flow controller for a smart distribution grid power transformation device. The bus power flow controller comprises an H-VSC converter and an L-VSC converter which are based on LCL-MMC and a multi-phase type direct current transformer based on MMC and intermediate frequency isolation; the alternating-current side of the H-VSC current converter is switched into a high voltage alternating current bus, and the direct-current side is switched into a high voltage direct current bus in a parallel-connection mode; the alternating-current side of the L-VSC current converter is switched into the high voltage alternating current bus, and the direct-current side is switched into the high voltage direct current bus in a parallel-connection mode; the direct current transformer comprises a high-voltage side H-VSC conversion circuit, a low-voltage side L-VSC conversion circuit and an intermediate frequency alternating-current transformer set; the alternating-current side of the high-voltage side H-VSC conversion circuit is in series connection with intermediate frequency alternating-current transformers, and the direct-current side of the high-voltage side H-VSC conversion circuit is switched in the high voltage direct current bus in a series-connection mode. By means of the novel structure provided in the bus power flow controller, interconnection among alternating-current-and-direct-current mixed-type power grids at different voltage levels is facilitated, mixture and coordination conversion of active power between alternating-current buses and direct-current buses at different rated voltage levels is achieved, and the reactive decoupling control function of the alternating-current side of high voltage and the alternating-current side of low voltage are achieved simultaneously.
Description
Technical field
The present invention relates to large-power flexible VSC to convert and direct current transformation technology, is a kind of novel intelligent power distribution network transformation device " bus flow controller ".
Background technology
The main carriers that following power distribution network will be extensively interconnected, highly intelligent, open interaction " energy the Internet ", can be implemented in the optimization of production of energy in wide scope, transmission, dispensing, conversion, consumption.Except the dispensing task bearing electric energy, following power distribution network also needs exchange and the distribution of the energy in feasible region, and the demand meeting distributed power source access and dissolve.
Existing distribution net work structure still depends on traditional higher level's AC network to carry out electric power and mutually transmits and adjustment, and AC network transmittability depends on system operation mode, the localized power distribution net particularly containing high permeability wind-powered electricity generation, solar power generation and a large amount of electric automobile regulates being difficult to realize power flexible.DC distribution net can improve power supply capacity and the quality of power supply effectively by contrast, controls active power independently fast, and access regenerative resource is flexible, convenient.Therefore, following power distribution network is extensively interconnected by interconnected for the different electric pressures realizing AC distribution net, DC distribution net and alternating current-direct current mixing power distribution network, be that network support realizes power flexible adjustment by direct current with conventional AC, coordinate the contradiction between bulk power grid and distributed power source.
For the deficiencies in the prior art, the invention provides a kind of bus flow controller (BPFC) based on multi-voltage grade alternating current-direct current hybrid power distribution network interconnecting application.This bus flow controller is using the critical support equipment as the flexible Power System Interconnection of alternating current-direct current hybrid, break through current conventional AC distribution net work structure, meet the interconnected growth requirement of following alternating current-direct current hybrid intelligent distribution network, combine with the communication technology simultaneously and construct a kind of multi-level alternating current-direct current hybrid power distribution network framework completely newly, in feasible region, multi-level distributed new interconnects.
Summary of the invention
The present invention relates to a kind of novel intelligent power distribution network transformation device bus flow controller.Comprise based on the H-VSC converter of LCL-MMC and L-VSC converter and the multiphase type commutator transformer based on MMC and intermediate frequency isolation;
Described H-VSC converter comprises high-pressure side LCL circuit and high-pressure side VSC translation circuit;
Described L-VSC converter comprises low-pressure side LCL circuit and low-pressure side VSC translation circuit;
Described commutator transformer comprises high-pressure side H-VSC translation circuit, low-pressure side L-VSC translation circuit and midfrequent AC transformer group;
Described high-pressure side VSC translation circuit AC is by after the LCL circuit of tandem high pressure side, and parallel connection accesses high-pressure side ac bus; VSC translation circuit DC side parallel access high-pressure side, described high-pressure side DC bus;
Described low-pressure side VSC translation circuit AC is by after series connection low-pressure side LCL circuit, and parallel connection accesses low-pressure side ac bus; Described low-pressure side VSC translation circuit DC side parallel access low-pressure side DC bus;
Described high-pressure side H-VSC translation circuit AC series connection midfrequent AC transformer group, DC side series connection high-pressure side DC bus;
Described low-pressure side L-VSC translation circuit AC series connection midfrequent AC transformer group, DC side series connection low-pressure side DC bus.
Further, high-pressure side LCL circuit is made up of three-phase six inductance and three electric capacity, every by two inductance and an electric capacity; Every mutually in two inductance series connection, electric capacity in parallel in the middle of two inductance, three star-like connections of electric capacity; Inductance in the LCL circuit of high-pressure side is connected with high voltage AC bus three respectively, and the inductance in the LCL circuit of high-pressure side is connected with the upper and lower bridge arm mid point of high-pressure side VSC translation circuit three-phase current converter respectively.
Further, high-pressure side VSC translation circuit is made up of three-phase six brachium pontis, and each brachium pontis comprises a reactor and n
5the submodule that individual structure is identical; To be connected with the reactor after another brachium pontis sub module cascade by reactor after a described phase inversion circuit sub module cascade and to be connected with described LCL circuit, the another two ends of this phase are connected with high-pressure side DC bus; Described three-phase current converter is overall in parallel.
Further, translation circuit is made up of n (n is an even number) phase 2n brachium pontis, and each brachium pontis comprises a reactor and n
8the submodule that individual structure is identical, every two-phase 4 brachium pontis are one group, altogether n/2 group; After described sub module cascade, one end to be connected with the reactor after another brachium pontis sub module cascade by reactor and to be connected with transformer in midfrequent AC transformer group, and the other end is connected with low-pressure side DC bus.
Further, midfrequent AC transformer group is made up of m identical transformer, and m transformers connected in parallel runs (m=n/2, n are the number of phases of translation circuit); In described midfrequent AC transformer group, transformer primary side connects high-pressure side H-VSC translation circuit, and secondary side connects low-pressure side L-VSC translation circuit.
Further, low-pressure side L-VSC translation circuit, identical with the structure of described high-pressure side H-VSC translation circuit, be made up of n (n is an even number) phase 2n brachium pontis, each brachium pontis comprises a reactor and n
9the submodule that individual structure is identical, every two-phase 4 brachium pontis are one group, altogether n/2 group; After described sub module cascade, one end to be connected with the reactor after another brachium pontis sub module cascade by reactor and to be connected with transformer in midfrequent AC transformer group, and the other end is connected with low-pressure side DC bus.
Further, low-pressure side VSC translation circuit is identical with high-pressure side VSC translation circuit structure, and be made up of three-phase six brachium pontis, each brachium pontis comprises a reactor and n
7the submodule that individual structure is identical; To be connected with the reactor after another brachium pontis sub module cascade by reactor after a described phase inversion circuit sub module cascade and to be connected with described low-pressure side LCL circuit, the another two ends of this phase are connected with low-pressure side DC bus; Described three-phase current converter is overall in parallel.
Further, low-pressure side LCL circuit structure is identical with high-pressure side LCL circuit structure, is made up of three-phase six inductance and three electric capacity, every by two inductance and an electric capacity; Every mutually in two inductance series connection, electric capacity in parallel in the middle of two inductance, three star-like connections of electric capacity; Inductance in low-pressure side LCL circuit is connected with low-pressure side ac bus three respectively, and the inductance in low-pressure side LCL circuit is connected with the upper and lower bridge arm mid point of low-pressure side VSC translation circuit three-phase converting means respectively.
Further, described submodule comprises semi-bridge type and bridge-type; Described semi-bridge type submodule is made up of 1 brachium pontis and 1 Capacitance parallel connection; Described bridge-type submodule is made up of 2 brachium pontis and 1 Capacitance parallel connection; Described brachium pontis comprises 2 series IGBT modules, and each IGBT module comprises the diode of 1 IGBT and 1 reverse parallel connection.
Accompanying drawing explanation
Fig. 1 is the basic system structure figure of a kind of novel intelligent power distribution network transformation device bus flow controller provided by the invention;
Fig. 2 is the system configuration circuit diagram of a kind of novel intelligent power distribution network transformation device bus flow controller provided by the invention;
Fig. 3 is the semi-bridge type sub modular structure figure of MMC in a kind of novel intelligent power distribution network transformation device bus flow controller provided by the invention;
Fig. 4 is the bridge-type sub modular structure figure of MMC in a kind of novel intelligent power distribution network transformation device bus flow controller provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, to above-mentioned being described in more detail with other technical characteristic and advantage of the present invention.
Consult shown in Fig. 1, it is basic system structure figure of the present invention.Comprise based on the H-VSC converter (1) of LCL-MMC and L-VSC converter (2) and the multiphase type commutator transformer (3) based on MMC and intermediate frequency isolation; H-VSC converter (1) AC access high-pressure side ac bus, DC side parallel access high-pressure side DC bus; L-VSC converter (2) AC access low-pressure side ac bus, DC side parallel access low-pressure side DC bus; Commutator transformer (3) comprises high-pressure side H-VSC translation circuit (8), low-pressure side L-VSC translation circuit (9) and midfrequent AC transformer group (10); High-pressure side H-VSC translation circuit (8) AC series connection midfrequent AC transformer group (10), DC side parallel connects high-pressure side DC bus; Low-pressure side L-VSC translation circuit (9) AC series connection midfrequent AC transformer group (10), DC side parallel connects low-pressure side DC bus.
Consult shown in Fig. 2, it is present system structural circuit figure.Described H-VSC converter (1), L-VSC converter (2), high-pressure side H-VSC translation circuit (8), low-pressure side L-VSC translation circuit (9) all build based on MMC submodule, and MMC submodule comprises semi-bridge type and bridge-type.
High-pressure side LCL circuit (4) is made up of three-phase six inductance and three electric capacity, every by two inductance and an electric capacity; Every mutually in two inductance series connection, electric capacity in parallel in the middle of two inductance, three star-like connections of electric capacity; Inductance 1,2,3 in high-pressure side LCL circuit (4) is connected with high voltage AC bus three respectively, and the inductance 4,5,6 in circuit (4) is connected with the upper and lower bridge arm mid point of high-pressure side MMC-VSC translation circuit (5) three-phase current converter respectively;
High-pressure side MMC-VSC translation circuit (5) is made up of three-phase six brachium pontis, and each brachium pontis comprises a reactor and n
5the submodule that individual structure is identical; Be connected with described high-pressure side LCL circuit (4) by reactor after described sub module cascade; Concrete, the exit 1 and 2 of submodule, successively with the module-cascade of front and back, again with a reactor brachium pontis in series, upper and lower two brachium pontis series connection, form 1 phase converter circuit, 3 phase converter circuits are overall in parallel, and draw high-pressure side MMC-VSC translation circuit (5) and be connected with the high voltage dc bus that high-pressure side H-VSC translation circuit (8) is drawn; In upper and lower bridge arm mid point access high-pressure side LCL circuit (4);
High-pressure side H-VSC translation circuit (8) is made up of n (n is an even number) phase 2n brachium pontis, and each brachium pontis comprises a reactor and n
8the submodule that individual structure is identical; N circuitry phase is divided into n/2 group, often group has 4 brachium pontis to form by two-phase, such as Bridge 1 arm and the 1st ' brachium pontis forms a phase, Bridge 2 arm and the 2nd ' brachium pontis forms a phase, this two-phase converter circuit is in parallel, lead-out wire in parallel is as high-pressure side DC bus, and two-phase forms one group and is connected with the transformer of the 1st in midfrequent AC transformer group (10); In high-pressure side H-VSC translation circuit (8), the circuit connecting mode of n/2 group is all described above.Two-phase in concrete one group, one be mutually after Bridge 1 arm sub module cascade one end by reactor and the 1st ' reactor after brachium pontis sub module cascade is connected and is connected with 1 line of transformer 1 in midfrequent AC transformer group (10), these mutually another two ends are connected with high-pressure side DC bus; Another be mutually after Bridge 2 arm sub module cascade one end by reactor and the 2nd ' reactor after brachium pontis sub module cascade is connected and is connected with 2 lines in transformer 1 in midfrequent AC transformer group (10); These mutually another two ends are connected with high-pressure side DC bus.N/2 group circuit connects identical, in the n-th/2 group, two when being connected, one is that after the (n-1)th brachium pontis sub module cascade, one end to be connected with the reactor after (n-1) ' brachium pontis sub module cascade by reactor and to be connected with n-1 line in transformer m in midfrequent AC transformer group (10) mutually, and these mutually another two ends are connected with high-pressure side DC bus; Another is that after the n-th brachium pontis sub module cascade, one end to be connected with the reactor after the n-th ' brachium pontis sub module cascade by reactor and to be connected with n line in transformer m in high-pressure side LCL circuit (4) mutually, and these mutually another two ends are connected with high-pressure side DC bus;
Midfrequent AC transformer group (10) is made up of m identical transformer, and m transformers connected in parallel runs (m=n/2, n are the number of phases of high-pressure side H-VSC translation circuit (8)).Reactor after brachium pontis sub module cascade that concrete connection is transformer 1 left end the 1st bar of line and the reactor and the 1st after H-VSC translation circuit (8) the Bridge 1 arm sub module cascade of high-pressure side ' reactor after brachium pontis sub module cascade be connected, transformer 1 left end the 2nd bar of line and the reactor and the 2nd after H-VSC translation circuit (8) the Bridge 2 arm sub module cascade of high-pressure side ' is connected; Reactor after brachium pontis sub module cascade that reactor after transformer 1 right-hand member the 1st ' bar line and the reactor and the 1st after low-pressure side L-VSC translation circuit (9) Bridge 1 arm sub module cascade ' brachium pontis sub module cascade is connected, transformer 1 right-hand member the 2nd ' bar line and the reactor and the 2nd after low-pressure side L-VSC translation circuit (9) Bridge 2 arm sub module cascade ' is connected.The connected mode of M transformer is described above, and transformer m left end (n-1)th bar of line is connected with the reactor after high-pressure side H-VSC translation circuit (8) (n-1)th brachium pontis sub module cascade and the reactor after (n-1) ' brachium pontis sub module cascade; Transformer m left end n-th line is connected with the reactor after high-pressure side H-VSC translation circuit (8) n-th brachium pontis sub module cascade and the reactor after the n-th ' brachium pontis sub module cascade; Transformer m right-hand member (n-1) ' bar line is connected with the reactor after low-pressure side L-VSC translation circuit (9) (n-1)th brachium pontis sub module cascade and the reactor after (n-1) ' brachium pontis sub module cascade; Transformer m right-hand member n-th line is connected with the reactor after low-pressure side L-VSC translation circuit (9) n-th brachium pontis sub module cascade and the reactor after the n-th ' brachium pontis sub module cascade;
Low-pressure side L-VSC translation circuit (9), identical with the structure of high-pressure side H-VSC translation circuit (8), be made up of n (n is an even number) phase 2n brachium pontis, each brachium pontis comprises a reactor and n
9the submodule that individual structure is identical; N circuitry phase is divided into n/2 group, often group is two-phase and has 4 brachium pontis to form, as Bridge 1 arm and the 1st ' brachium pontis forms a phase, Bridge 2 arm and the 2nd ' brachium pontis forms a phase, this two-phase converter circuit is in parallel, lead-out wire in parallel as low-pressure side DC bus, two-phase form one group with the 1st in midfrequent AC transformer group (10) ' individual transformer is connected; In low-pressure side L-VSC translation circuit (9), the circuit connecting mode of n/2 group is all described above.Two-phase in concrete one group, one be mutually after Bridge 1 arm sub module cascade one end by reactor and the 1st ' reactor after brachium pontis sub module cascade is connected and is connected with 1 ' line of transformer 1 in midfrequent AC transformer group (10), this mutually another two ends end is connected with low-pressure side DC bus; Another be mutually after Bridge 2 arm sub module cascade one end by reactor and the 2nd ' reactor after brachium pontis sub module cascade is connected and is connected with 2 ' line in transformer 1 in midfrequent AC transformer group (10); These mutually another two ends are connected with low-pressure side DC bus.N/2 group circuit connects identical, when connecting to the n-th/2 group, one is that after the (n-1)th brachium pontis sub module cascade, one end to be connected with the reactor after (n-1) ' brachium pontis sub module cascade by reactor and to be connected with n-1 line in transformer m in midfrequent AC transformer group (10) mutually, and these mutually another two ends are connected with low-pressure side DC bus; Another is that after the n-th brachium pontis sub module cascade, one end to be connected with the reactor after the n-th ' brachium pontis sub module cascade by reactor and to be connected with n ' line in transformer m in midfrequent AC transformer group (10) mutually, and these mutually another two ends are connected with low-pressure side DC bus;
Low-pressure side VSC translation circuit (7) is identical with high-pressure side VSC translation circuit (5) structure, and be made up of three-phase six brachium pontis, each brachium pontis comprises a reactor and n
7the submodule that individual structure is identical; Be connected with described low-pressure side LCL circuit (6) by reactor after described sub module cascade; Concrete, the exit 1 and 2 of submodule, successively with the module-cascade of front and back, again with a reactor brachium pontis in series, upper and lower two brachium pontis series connection, form 1 phase converter circuit, 3 phase converter circuits are overall in parallel, and draw low-pressure side VSC translation circuit (7) and be connected with the low-voltage direct bus that low-pressure side L-VSC translation circuit (9) is drawn.In upper and lower bridge arm mid point access low-pressure side LCL circuit (6);
Low-pressure side LCL circuit (6) structure is identical with high-pressure side LCL circuit (4) structure, is made up of three-phase six inductance and three electric capacity, every by two inductance and an electric capacity; Every mutually in two inductance series connection, electric capacity in parallel in the middle of two inductance, three star-like connections of electric capacity; Inductance 1,2,3 in low-pressure side LCL circuit (6) is connected with low-voltage alternating-current bus three respectively, and the inductance 4,5,6 in low-pressure side LCL circuit (6) is connected with the upper and lower bridge arm mid point of converter (7) three-phase converter circuit respectively.
Consult shown in Fig. 3, it is the semi-bridge type sub modular structure figure of MMC of the present invention, and wherein semi-bridge type submodule is made up of 1 brachium pontis and 1 Capacitance parallel connection; Brachium pontis comprises 2 series IGBT modules; Each IGBT module comprises the diode of 1 IGBT and 1 reverse parallel connection; Brachium pontis mid point exit 1, lower IGBT emitter exit 2.
Consult shown in Fig. 4, it is the bridge-type sub modular structure figure of MMC of the present invention.Wherein bridge-type submodule is made up of 2 brachium pontis and 1 Capacitance parallel connection; Each brachium pontis comprises 2 series IGBT modules; Each IGBT module comprises the diode of 1 IGBT and 1 reverse parallel connection; Two brachium pontis mid points are exit 1 and end 2 respectively.
The foregoing is only preferred embodiment of the present invention, is only illustrative for invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes in the spirit and scope that invention claim limits to it, amendment, even equivalence, but all will fall within the scope of protection of the present invention.
Claims (9)
1. a novel intelligent power distribution network transformation device bus flow controller, it is characterized in that, described bus flow controller comprises based on the H-VSC converter (1) of LCL-MMC and L-VSC converter (2) and the multiphase type commutator transformer (3) based on MMC and intermediate frequency isolation;
Described H-VSC converter (1) comprises high-pressure side LCL circuit (4) and high-pressure side VSC translation circuit (5);
Described L-VSC converter (2) comprises low-pressure side LCL circuit (6) and low-pressure side VSC translation circuit (7);
Described commutator transformer (3) comprises high-pressure side H-VSC translation circuit (8), low-pressure side L-VSC translation circuit (9) and midfrequent AC transformer group (10);
Described high-pressure side VSC translation circuit (5) AC is by behind tandem high pressure side LCL circuit (4), and parallel connection accesses high voltage AC bus; VSC translation circuit (5) DC side parallel access high-pressure side, described high-pressure side DC bus;
Described low-pressure side VSC translation circuit (7) AC is by after series connection low-pressure side LCL circuit (6), and parallel connection accesses low-pressure side ac bus; Described low-pressure side VSC translation circuit (7) DC side parallel access low-pressure side DC bus;
Described high-pressure side H-VSC translation circuit (8) AC series connection midfrequent AC transformer group (10), DC side series connection high-pressure side DC bus;
Described low-pressure side L-VSC translation circuit (9) AC series connection midfrequent AC transformer group (10), DC side series connection low-pressure side DC bus.
2. novel intelligent power distribution network transformation device bus flow controller according to claim 1, it is characterized in that, described high-pressure side LCL circuit (4) is made up of three-phase six inductance and three electric capacity, every by two inductance and an electric capacity; Every mutually in two inductance series connection, electric capacity in parallel in the middle of two inductance, three star-like connections of electric capacity; Inductance in high-pressure side LCL circuit (4) is connected with high voltage AC bus three respectively, and the inductance in high-pressure side LCL circuit (4) is connected with the upper and lower bridge arm mid point of high-pressure side VSC translation circuit (5) three-phase current converter respectively.
3. novel intelligent power distribution network transformation device bus flow controller according to claim 1, it is characterized in that, described high-pressure side VSC translation circuit (5) is made up of three-phase six brachium pontis, and each brachium pontis comprises a reactor and n
5the submodule that individual structure is identical; To be connected with the reactor after another brachium pontis sub module cascade by reactor after a described phase inversion circuit sub module cascade and to be connected with described LCL circuit (4), the another two ends of this phase are connected with high-pressure side DC bus; Described three-phase current converter is overall in parallel.
4. novel intelligent power distribution network transformation device bus flow controller according to claim 1, is characterized in that, described translation circuit (8) is made up of n (n is an even number) phase 2n brachium pontis, and each brachium pontis comprises a reactor and n
8the submodule that individual structure is identical, every two-phase 4 brachium pontis are one group, altogether n/2 group; After described sub module cascade, one end to be connected with the reactor after another brachium pontis sub module cascade by reactor and to be connected with transformer in midfrequent AC transformer group (10), and the other end is connected with low-pressure side DC bus.
5. novel intelligent power distribution network transformation device bus flow controller according to claim 1, it is characterized in that, described midfrequent AC transformer group (10) is made up of m identical transformer, m transformers connected in parallel runs (m=n/2, n are the number of phases of translation circuit (8)); In described midfrequent AC transformer group (10), transformer primary side connects high-pressure side H-VSC translation circuit (8), and secondary side connects low-pressure side L-VSC translation circuit (9).
6. novel intelligent power distribution network transformation device bus flow controller according to claim 1, it is characterized in that, described low-pressure side L-VSC translation circuit (9), identical with the structure of described high-pressure side H-VSC translation circuit (8), be made up of n (n is an even number) phase 2n brachium pontis, each brachium pontis comprises a reactor and n
9the submodule that individual structure is identical, every two-phase 4 brachium pontis are one group, altogether n/2 group; After described sub module cascade, one end to be connected with the reactor after another brachium pontis sub module cascade by reactor and to be connected with transformer in midfrequent AC transformer group (10), and the other end is connected with low-pressure side DC bus.
7. novel intelligent power distribution network transformation device bus flow controller according to claim 1, it is characterized in that, described low-pressure side VSC translation circuit (7) is identical with high-pressure side VSC translation circuit (5) structure, be made up of three-phase six brachium pontis, each brachium pontis comprises a reactor and n
7the submodule that individual structure is identical; To be connected with the reactor after another brachium pontis sub module cascade by reactor after a described phase inversion circuit sub module cascade and to be connected with described low-pressure side LCL circuit (6), the another two ends of this phase are connected with low-pressure side DC bus; Described three-phase current converter is overall in parallel.
8. novel intelligent power distribution network transformation device bus flow controller according to claim 1, it is characterized in that, described low-pressure side LCL circuit (6) structure is identical with high-pressure side LCL circuit (4) structure, be made up of three-phase six inductance and three electric capacity, every by two inductance and an electric capacity; Every mutually in two inductance series connection, electric capacity in parallel in the middle of two inductance, three star-like connections of electric capacity; Inductance in low-pressure side LCL circuit (6) is connected with low-pressure side ac bus three respectively, and the inductance in low-pressure side LCL circuit (6) is connected with the upper and lower bridge arm mid point of low-pressure side VSC translation circuit (7) three-phase converting means respectively.
9. the novel intelligent power distribution network transformation device bus flow controller according to claim 3,4,6 or 7, it is characterized in that, described submodule comprises semi-bridge type and bridge-type; Described semi-bridge type submodule is made up of 1 brachium pontis and 1 Capacitance parallel connection; Described bridge-type submodule is made up of 2 brachium pontis and 1 Capacitance parallel connection; Described brachium pontis comprises 2 series IGBT modules, and each IGBT module comprises the diode of 1 IGBT and 1 reverse parallel connection.
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| CN201510190605.6A CN104767227B (en) | 2015-04-18 | 2015-04-18 | A kind of intelligent distribution network transformation device busbar flow controller |
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| CN201510190605.6A CN104767227B (en) | 2015-04-18 | 2015-04-18 | A kind of intelligent distribution network transformation device busbar flow controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160490A (en) * | 2016-06-30 | 2016-11-23 | 上海交通大学 | A kind of dual input list output DC DC changer |
| CN106602608A (en) * | 2017-01-12 | 2017-04-26 | 国网江苏省电力公司南京供电公司 | Photovoltaic energy storage system in DC power distribution network and operation control method thereof |
| CN111327084A (en) * | 2020-03-03 | 2020-06-23 | 中国南方电网有限责任公司 | Alternating current-direct current multi-port interconnection system, control method and device thereof, and storage medium |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160490A (en) * | 2016-06-30 | 2016-11-23 | 上海交通大学 | A kind of dual input list output DC DC changer |
| CN106160490B (en) * | 2016-06-30 | 2018-10-23 | 上海交通大学 | A kind of dual input list output DC-DC converter |
| CN106602608A (en) * | 2017-01-12 | 2017-04-26 | 国网江苏省电力公司南京供电公司 | Photovoltaic energy storage system in DC power distribution network and operation control method thereof |
| CN106602608B (en) * | 2017-01-12 | 2019-05-14 | 国网江苏省电力公司南京供电公司 | Photovoltaic energy storage system and its progress control method in a kind of DC distribution net |
| CN111327084A (en) * | 2020-03-03 | 2020-06-23 | 中国南方电网有限责任公司 | Alternating current-direct current multi-port interconnection system, control method and device thereof, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104767227B (en) | 2018-11-06 |
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