WO2020169018A1 - Convertisseur ayant de multiples ports cc et procédé de commande - Google Patents

Convertisseur ayant de multiples ports cc et procédé de commande Download PDF

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Publication number
WO2020169018A1
WO2020169018A1 PCT/CN2020/075665 CN2020075665W WO2020169018A1 WO 2020169018 A1 WO2020169018 A1 WO 2020169018A1 CN 2020075665 W CN2020075665 W CN 2020075665W WO 2020169018 A1 WO2020169018 A1 WO 2020169018A1
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WO
WIPO (PCT)
Prior art keywords
port
converter
voltage
module
unidirectional
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PCT/CN2020/075665
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English (en)
Chinese (zh)
Inventor
谢晔源
王宇
李海英
曹冬明
连建阳
张中锋
杨晨
Original Assignee
南京南瑞继保电气有限公司
南京南瑞继保工程技术有限公司
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Publication of WO2020169018A1 publication Critical patent/WO2020169018A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • 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
    • 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
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • 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
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Definitions

  • the invention relates to a multi-DC port converter and a control method, belonging to the technical field of high-power power electronic converters.
  • the present invention proposes a multi-DC port converter and a control method. Only one set of converters can provide multiple DC ports of different voltage levels, and can be connected to multiple sets of DC buses without adding additional Investment, cost-effective.
  • the multi-DC port converter includes a multi-winding transformer, M unidirectional converter modules and N bidirectional converter modules, where M is an integer greater than or equal to 2, and N is An integer greater than or equal to 1, the multi-winding transformer includes a primary winding and M+N secondary windings, the AC side and the secondary windings of the unidirectional converter module and the bidirectional converter module are connected in one-to-one correspondence, so
  • the DC output side of the N bidirectional converter modules are cascaded, the cascade head end is defined as the positive pole of the low voltage DC port, and the cascade tail end is defined as the negative pole of the low voltage DC port; the low voltage DC port is then commutated with M unidirectional converters
  • the DC output side of the converter module is cascaded, the head of the cascade is defined as the positive pole of the high voltage DC port, and the tail end of the cascade is defined as the negative pole of the high voltage DC port.
  • the one-way converter module is composed of uncontrolled or semi-controlled power semiconductor devices.
  • the bidirectional converter module is composed of a fully controlled power semiconductor device.
  • the N bidirectional converter modules in the multi-DC port converter are located in the middle of all the converter modules.
  • the low-voltage direct current port and the high-voltage direct current port are connected through a DC/DC converter, and the DC/DC converter is connected to direct currents of different amplitudes to realize a bidirectional flow of energy.
  • the multi-DC port converter further includes a Kth DC port, where K is an integer greater than or equal to 2 and less than or equal to (M+N); there are M unidirectional converter modules and N bidirectional converter modules. K continuous modules are randomly selected from the module series chain of the module, the positive lead-out port of the module close to the positive pole of the high-voltage DC port is the positive of the Kth DC port, and the negative lead-out port of the module close to the negative of the high-voltage DC port is the negative of the K-th DC port.
  • the low-voltage DC port and the Kth DC port are connected through a DC/DC converter.
  • the N is an even number greater than or equal to 2, counted from the positive pole of the low-voltage DC port to the negative pole of the low-voltage DC port, and the negative pole of the N/2th bidirectional converter module is led out and grounded.
  • any two or more bidirectional converter modules are connected in parallel, that is, the positive poles of the DC output sides of any two or more bidirectional modules are connected, and the negative poles of the corresponding DC output sides are connected.
  • the DC output sides of any two or more unidirectional converter modules are connected in parallel, that is, the anodes of the DC output sides of any two or more unidirectional modules are connected, and the cathodes of the corresponding DC output sides are connected .
  • the DC output sides of the unidirectional converter module and the bidirectional converter module are also connected in parallel with a bypass switch respectively.
  • the DC output sides of the unidirectional converter module and the bidirectional converter module are respectively connected in series with a power electronic unit.
  • the power electronic unit can quickly break the output DC current, can bypass the DC output side of the converter module, and can adjust the output voltage.
  • the power electronic unit is composed of two fully-controlled power semiconductor device IGBT half-bridge modules, the positive electrode of the input side of the power electronic unit is the collector of the upper tube IGBT, and the negative electrode of the input side of the power electronic unit is the lower tube IGBT
  • the emitter electrode of the half-bridge is led out as the output positive pole
  • the emitter electrode of the down tube IGBT is led out as the output negative pole.
  • the power electronic unit is composed of a full-bridge module of four fully-controlled power semiconductor devices IGBT.
  • the power electronic unit is composed of a half-bridge module, an inductor and a DC capacitor, the input side of the power electronic unit is connected to both ends of the half-bridge module, the midpoint of the half-bridge module is connected to the inductor as the output side of the power electronic unit, and the output side is connected in parallel DC capacitors.
  • the power electronic unit is composed of a half-bridge module, an inductor and a DC capacitor, the input side of the power electronic unit is connected to the midpoint of the half-bridge module via the inductor, and the two ends of the half-bridge module are connected in parallel with the DC capacitor as the output side of the power electronic unit .
  • the multi-DC port converter according to claim 1, wherein: between the AC side of the unidirectional converter module and the bidirectional converter module and the secondary winding of the multi-winding transformer An AC switch is connected in series.
  • phase of the secondary windings of the multi-winding transformer are different by a certain angle to eliminate the primary harmonics.
  • the unidirectional converter module includes an AC-DC converter composed of diodes or thyristors and a DC capacitor.
  • the DC side of the AC-DC converter is connected in parallel with the DC capacitor, and the AC side of the AC-DC converter is connected to the multi-winding transformer. The secondary side is connected.
  • the bidirectional converter module includes an AC-DC converter, a DC capacitor, and a filter unit composed of fully-controlled power semiconductor devices.
  • the DC side of the AC-DC converter is connected in parallel with the DC capacitor, and the AC-DC converter After the side is connected to the filter unit, it is then connected to the secondary side of the multi-winding transformer.
  • the present invention also includes a control method of the multi-DC port converter:
  • Step 1 Close the AC switch of the single and bidirectional converter module
  • Step 2 The primary side of the multi-winding transformer is charged, and the DC capacitors of the single and bidirectional converter modules enter the charging state;
  • Step 3 After the charging is completed, the DC capacitor voltage is stable, the bidirectional converter module is started, the power semiconductor device is unlocked, and the output DC voltage of the bidirectional converter module is adjusted to reach the target value.
  • Method 1 Adjust the DC voltage of the low-voltage DC port, and the DC voltage of the high-voltage DC port will change accordingly;
  • Method 2 When the one-way converter adopts a semi-controlled device, calculate the output voltage of the one-way converter module according to the set target value, control the conduction time of the semi-controlled device of the one-way converter, and control the unit The output voltage to the converter module.
  • Method 3 Calculate the output voltage of the unidirectional converter module according to the set target value, and use the power electronic unit in the unidirectional converter module to control the output voltage of the unidirectional converter module;
  • Method 4 Use the power electronic unit in the unidirectional converter module to bypass a certain number of unidirectional converter modules.
  • the following control method can be adopted: according to the set target value, calculate the number of one-way converter modules required, and use the bypass switch in the one-way converter module. Circuit switch to bypass a certain number of unidirectional converter modules;
  • Method 1 Detect the voltage increase at the low-voltage DC port, the bidirectional converter module transmits the remaining energy to the primary side through the secondary side of the transformer;
  • Method 2 Detect the voltage increase of the low-voltage DC port, and transfer the remaining energy to the high-voltage DC port through the DC/DC converter.
  • Method 1 Detect the voltage increase at the high-voltage DC port, and transfer the remaining energy to the low-voltage DC port through the DC/DC converter.
  • Method 2 The low-voltage DC port transmits part of the energy to the load.
  • the bidirectional converter module transmits the remaining energy to the primary side through the secondary side of the transformer;
  • the present invention proposes a multi-DC port converter, which constructs multiple sets of DC ports by cascading the DC capacitors of multiple converter modules, and the low-voltage DC ports formed by the bidirectional converter modules can realize bidirectional power flow. It is suitable for the connection of power supply or load.
  • the high-voltage DC port formed by the unidirectional converter module is suitable for the connection of the load.
  • the invention also includes a bidirectional DC/DC converter between the high-voltage DC port and the low-voltage DC port. In the case of reverse power, the reverse power can be transferred to another port through a bidirectional DC/DC converter, or to the primary side of the transformer.
  • a multi-DC port converter can provide both high voltage DC and low voltage DC ports at the same time, and can handle reverse power at the same time . Facilitate the access of DC distribution network.
  • the program has low cost and high cost performance.
  • the unidirectional converter module and the bidirectional converter module of the present invention are connected to the secondary side of the multi-winding transformer, and are isolated from each other by the secondary side winding. At the same time, it is also equipped with power electronic units and AC switches, which can be conveniently based on actual needs. , Adjust the number of input converter modules, or change the series-parallel mode on the output side of the converter modules. When the voltage is higher, the cascade scheme is adopted. When the current is higher, the output side of the module can be connected in parallel. The flexibility of the scheme is improved. At the same time, when the module fails, the faulty module can be quickly removed, which greatly improves the reliability of the scheme.
  • Figure 1 is a schematic diagram of the composition of the multi-DC port converter of the present invention.
  • Figure 2 is a typical topology diagram of a DC distribution network in the prior art
  • Figure 3 is a first embodiment of a power electronic unit
  • Figure 4 is a second embodiment of a power electronic unit
  • Figure 5 is a third embodiment of a power electronic unit
  • Figure 6 is a fourth embodiment of a power electronic unit
  • Figure 7 is the second embodiment of the multi-DC port converter of the present invention.
  • Figure 8 is a third embodiment of the multi-DC port converter of the present invention.
  • Figure 9 is a fourth embodiment of the multi-DC port converter of the present invention.
  • Multi-winding transformer 2. One-way converter module; 3. Two-way converter module; 4. High voltage DC port positive; 5. High voltage DC port negative; 6. Low voltage DC port positive; 7 , Low voltage DC port negative; 8. AC switch; 9. Power electronic unit; 10. DC/DC converter; 11. Bypass switch.
  • the multi-DC port converter of the present invention includes a multi-winding transformer 1, M unidirectional converter modules 2 and N bidirectional converter modules 3, where M is an integer greater than or equal to 2, and N is An integer greater than or equal to 1, the multi-winding transformer includes a primary winding and M+N secondary windings, the AC side and the secondary windings of the unidirectional converter module and the bidirectional converter module are connected in one-to-one correspondence, so
  • the DC output side of the N bidirectional converter modules are cascaded, the cascade head end is defined as the low-voltage DC port positive 6 and the cascade tail end is defined as the low-voltage DC port negative 7; the low-voltage DC port is connected to M unidirectional
  • the DC output side of the converter module is cascaded, the head of the cascade is defined as the positive 4 of the high-voltage DC port, and the tail end of the cascade is defined as the negative 5 of the high-voltage DC port;
  • the unidirectional converter module is uncontrolled or semi-controlled
  • the N bidirectional converter modules in the multi-DC port converter are located in the middle of all the converter modules.
  • the upper and lower sides of the two-way inverter module each contain the same number of one-way inverter modules.
  • the low-voltage direct current port and the high-voltage direct current port are connected through a DC/DC converter 10, and the DC/DC converter is connected to direct currents of different amplitudes and realizes bidirectional flow of energy.
  • the multi-DC port converter further includes a Kth DC port, where K is an integer greater than or equal to 2 and less than or equal to (M+N); in the modules of M unidirectional converter modules and N bidirectional converter modules K continuous modules are randomly selected in the series chain, the positive lead-out port of the module close to the positive pole of the high-voltage DC port is the positive pole of the Kth DC port, and the negative lead-out port of the module close to the negative pole of the high-voltage DC port is the negative of the Kth DC port.
  • the serial link port formed by any continuous module can be led out.
  • the low-voltage DC port and the Kth DC port are connected through a DC/DC converter.
  • N is an even number greater than or equal to 2, counted from the positive pole of the low-voltage DC port to the negative pole of the low-voltage DC port, and the negative pole of the N/2th bidirectional converter module is led out and grounded.
  • N is an even number greater than or equal to 2, counted from the positive pole of the low-voltage DC port to the negative pole of the low-voltage DC port, and the negative pole of the N/2th bidirectional converter module is led out and grounded.
  • the DC output sides of any two or more bidirectional converter modules can be connected in parallel, that is, the positive pole of the DC output side of each bidirectional module is connected, and the negative pole of the corresponding DC output side is connected.
  • the DC output sides of any two or more unidirectional converter modules can also be connected in parallel, that is, the positive pole of the DC output side of each one-way module is connected, and the negative pole of the corresponding DC output side is connected.
  • every two single-phase modules are connected in parallel to form a group, and then cascaded.
  • bypass switch 11 is also connected in parallel on the DC output side of the unidirectional converter module and the bidirectional converter module.
  • a power electronic unit 9 is connected in series on the DC output side of the unidirectional converter module and the bidirectional converter module.
  • the power electronic unit can quickly break the output DC current, can bypass the DC output side of the converter module, and can adjust the output voltage.
  • the power electronic unit is composed of two fully-controlled power semiconductor device IGBT half-bridge modules.
  • the positive pole of the input side is the collector of the upper tube IGBT, and the negative pole of the input side is
  • the emitter electrode of the lower tube IGBT is led out from the midpoint of the half-bridge as the output anode, and the emitter electrode of the lower tube IGBT is led out as the output cathode.
  • the upper tube IGBT is turned on and the lower tube IGBT is turned off.
  • the upper tube IGBT is turned off and the lower tube IGBT is kept turned off.
  • FIG. 4 it is the second embodiment of the power electronic unit.
  • the power electronic unit is composed of a full-bridge module with four fully-controlled power semiconductor devices IGBT.
  • Figures 5 and 6 show the third and fourth embodiments with voltage regulation function, which are composed of half-bridge modules, inductors and capacitors.
  • the input side of the power electronic unit in Figure 5 is connected to both ends of the half-bridge module.
  • the midpoint of the power electronic unit is connected to the inductor as the output side of the power electronic unit, and the output side is connected in parallel with a DC capacitor; Figure 6 side.
  • an AC switch 8 is connected in series between the AC side of the unidirectional converter module and the bidirectional converter module and the secondary winding of the multi-winding transformer.
  • the phases of the secondary windings of the multi-winding transformer are different by a certain angle to eliminate the primary harmonics.
  • the unidirectional converter module includes an AC-DC converter composed of diodes or thyristors and a DC capacitor.
  • the DC side of the AC-DC converter is connected in parallel with the DC capacitor, and the AC side of the AC-DC converter is connected to the multi-winding transformer.
  • the secondary side is connected.
  • the bidirectional converter module includes an AC-DC converter, a DC capacitor, and a filter unit composed of a fully-controlled power semiconductor device.
  • the DC side of the AC-DC converter is connected in parallel with the DC capacitor, and the AC side of the AC-DC converter After connecting with the filter unit, connect with the secondary side of the multi-winding transformer.
  • the present invention also includes a control method of the multi-DC port converter:
  • Step 1 Close the AC switch of the single and bidirectional converter module
  • Step 2 The primary side of the multi-winding transformer is charged, and the DC capacitors of the single and bidirectional converter modules enter the charging state;
  • Step 3 After the charging is completed, the DC capacitor voltage is stable, the bidirectional converter module is started, the power semiconductor device is unlocked, and the output DC voltage of the bidirectional converter module is adjusted to reach the target value.
  • Method 1 Adjust the DC voltage of the low-voltage DC port, and the DC voltage of the high-voltage DC port will change accordingly;
  • Method 2 When the one-way converter adopts a semi-controlled device, calculate the output voltage of the one-way converter module according to the set target value, control the conduction time of the semi-controlled device of the one-way converter, and control the unit The output voltage to the converter module.
  • Method 3 Calculate the output voltage of the unidirectional converter module according to the set target value, and use the power electronic unit in the unidirectional converter module to control the output voltage of the unidirectional converter module;
  • Method 4 Use the power electronic unit in the unidirectional converter module to bypass a certain number of unidirectional converter modules.
  • the following control method can be adopted: according to the set target value, calculate the number of one-way converter modules required, and use the bypass switch in the one-way converter module. Circuit switch to bypass a certain number of unidirectional converter modules;
  • Method 1 Detect the voltage increase at the low-voltage DC port, the bidirectional converter module transmits the remaining energy to the primary side through the secondary side of the transformer;
  • Method 2 Detect the voltage increase of the low-voltage DC port, and transfer the remaining energy to the high-voltage DC port through the DC/DC converter.
  • Method 1 Detect the voltage increase at the high-voltage DC port, and transfer the remaining energy to the low-voltage DC port through the DC/DC converter.
  • Method 2 The low-voltage DC port transmits part of the energy to the load.
  • the bidirectional converter module transmits the remaining energy to the primary side through the secondary side of the transformer.
  • the multi-DC port converter of the present invention can be applied to the DC distribution network, as shown in FIG. 9.
  • the N bidirectional converter modules in the converter are located in the middle of all the modules.
  • the high voltage DC port is connected to the load bus.
  • the load bus is ⁇ 10kV DC.
  • the low-voltage DC port leads as the interface of the DC distribution network, and the energy storage system or photovoltaic system is connected to or DC load through the DC/DC converter.
  • Step 1 Close the AC switch of the single and bidirectional converter module
  • Step 2 The primary side of the multi-winding transformer is charged, and the DC capacitors of the single and bidirectional converter modules enter the charging state;
  • Step 3 After the charging is completed, the DC capacitor voltage is stable, the bidirectional converter module is started, the power semiconductor device is unlocked, and the output DC voltage of the bidirectional converter module is adjusted to reach the target value.
  • Method 1 Adjust the DC voltage of the low voltage DC port, and the DC voltage of the high voltage DC port will change accordingly;
  • Method 2 According to the set target value, calculate the required number of unidirectional converter modules, and use the power electronic unit or bypass switch in the unidirectional converter module to bypass a certain number of unidirectional converter modules .
  • method 1 can be used to adjust the low-voltage DC port voltage to ⁇ 400V by adjusting the output DC voltage of the bidirectional converter module.
  • method 2 can be used, using the power electronic unit in the one-way converter module to bypass the two one-way converter modules, which can bypass each of the upper and lower modules to achieve the output voltage adjust.
  • the above-mentioned unidirectional converter module can use semi-controlled devices, such as thyristors.
  • the bridge circuit composed of thyristors has the function of output DC voltage regulation. Specifically: according to the set target value, calculate the output voltage of the unidirectional converter module, control the on-time of the thyristor of the unidirectional converter, and control the output voltage of the unidirectional converter module.
  • Method 4 The above-mentioned power electronic unit can use the circuit shown in Figure 5, which is a typical step-down regulator circuit, which can reduce the output DC voltage of the unidirectional converter module to ⁇ 8kV.
  • Method 1 Detect the voltage increase at the low-voltage DC port, the bidirectional converter module transmits the remaining energy to the primary side through the secondary side of the transformer;
  • Method 2 Detect the voltage increase of the low-voltage DC port, and transfer the remaining energy to the high-voltage DC port through the DC/DC converter.
  • Method 1 Detect the voltage increase at the high-voltage DC port, and transfer the remaining energy to the low-voltage DC port through the DC/DC converter.
  • Method 2 The low-voltage DC port transmits part of the energy to the load.
  • the bidirectional converter module transmits the remaining energy to the primary side through the secondary side of the transformer;

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un convertisseur ayant de multiples ports CC. Le convertisseur comprend un transformateur à enroulements multiples, M modules convertisseurs unidirectionnels, et N modules convertisseurs bidirectionnels. Le transformateur à enroulements multiples comprend un enroulement primaire et M+N enroulements secondaires. Les côtés CA des modules convertisseurs unidirectionnels et des modules convertisseurs bidirectionnels sont connectés de manière correspondante aux enroulements secondaires de manière biunivoque. Les côtés CC des N modules convertisseurs bidirectionnels forment une connexion en cascade, et les extrémités avant et arrière de ladite connexion en cascade forment un port CC basse tension. Le port CC basse tension forme en outre une connexion en cascade avec les côtés CC des M modules convertisseurs unidirectionnels, et les extrémités avant et arrière de ladite connexion en cascade forment un port CC haute tension. L'invention concerne en outre un procédé de commande correspondant. Le convertisseur ayant de multiples ports CC dans la présente invention fournit une pluralité de ports CC, forme un bus CC, se connecte à une charge CC et à une alimentation électrique CC, et présente des caractéristiques de redondance, une fiabilité élevée et un bon rapport coût-performance.
PCT/CN2020/075665 2019-02-19 2020-02-18 Convertisseur ayant de multiples ports cc et procédé de commande WO2020169018A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910120985.4A CN109873568A (zh) 2019-02-19 2019-02-19 一种多直流端口换流器及控制方法
CN201910120985.4 2019-02-19

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WO2020169018A1 true WO2020169018A1 (fr) 2020-08-27

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US11817701B2 (en) 2021-01-29 2023-11-14 Eaton Intelligent Power Limited Multi-port split-phase power system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109873568A (zh) * 2019-02-19 2019-06-11 南京南瑞继保电气有限公司 一种多直流端口换流器及控制方法
CN110995005A (zh) * 2019-11-27 2020-04-10 国网江苏省电力有限公司电力科学研究院 直流电电路拓扑
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