CN116316774A - Modular converter for flexible interconnection device of transformer area and control method - Google Patents
Modular converter for flexible interconnection device of transformer area and control method Download PDFInfo
- Publication number
- CN116316774A CN116316774A CN202310163490.6A CN202310163490A CN116316774A CN 116316774 A CN116316774 A CN 116316774A CN 202310163490 A CN202310163490 A CN 202310163490A CN 116316774 A CN116316774 A CN 116316774A
- Authority
- CN
- China
- Prior art keywords
- power
- power module
- converter
- flexible interconnection
- modularized
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 13
- 230000001360 synchronised effect Effects 0.000 claims abstract description 13
- 230000002159 abnormal effect Effects 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- 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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00004—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the power network being locally controlled
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Inverter Devices (AREA)
Abstract
The invention provides a modularized converter and a control method for a flexible interconnection device of a platform area, wherein the modularized converter comprises a flexible interconnection controller of the platform area and also comprises a modularized converter formed by a power module controller and at least one power module; the flexible interconnection controller of the platform area is used for controlling the power, voltage and operation mode switching of all the modularized converters in the flexible interconnection device of the platform area; the power module controller generates a synchronous control signal to realize the regulation of the output characteristics of the modularized converter or control the running number of the power modules; the flexible interconnection controller of the station area is connected with the power module controller through a communication link, and the communication mode of the communication link comprises a CAN bus, a network cable and a control cable; the power module controller is communicated with the power module through a CAN bus; the invention can reduce the manufacturing cost, the operation efficiency and the reliability of the transformer of the flexible interconnection device of the transformer area.
Description
Technical Field
The invention relates to the technical field of low-voltage intelligent power distribution, in particular to a modularized converter for a flexible interconnection device of a transformer area and a control method.
Background
Under the national 'double carbon' strategic background, the distributed photovoltaic and charging piles are connected into the platform area in a large-scale grid-connected mode, and higher requirements are put forward on the power supply capacity and the power quality of the platform area.
The flexible interconnection of the transformer areas can realize the power interaction, fault transfer, electric energy management and the like among the transformer areas with different load characteristics, and can effectively improve the power supply capacity and the electric energy quality of the transformer areas.
The flexible interconnection device of the current transformer area has the following problems:
(1) The flexible interconnection device of the transformer area generally adopts an alternating current-direct current-alternating current scheme, and the flexible interconnection device needs to be customized due to different capacities of the interconnected transformer areas, so that the manufacturing cost is relatively high in the present stage.
(2) Because the load of the platform area is obviously influenced by users, the load fluctuation is larger, and the flexible interconnection device may have the condition of insufficient utilization rate, thereby causing the reduction of the operation efficiency.
The present invention proposes a solution to the above problem.
Disclosure of Invention
The invention provides a modularized converter for a flexible interconnection device of a transformer area and a control method thereof, which can reduce the manufacturing cost, the operation efficiency and the reliability of the converter of the flexible interconnection device of the transformer area.
The invention adopts the following technical scheme.
The control method comprises a flexible interconnection controller of a platform area and a modularized converter consisting of a power module controller and at least one power module; the flexible interconnection controller of the platform area is used for controlling the power, voltage and operation mode switching of all the modularized converters in the flexible interconnection device of the platform area; the power module controller generates a synchronous control signal to realize the regulation of the output characteristics of the modularized converter or control the running number of the power modules; the flexible interconnection controller of the station area is connected with the power module controller through a communication link, and the communication mode of the communication link comprises a CAN bus, a network cable and a control cable; the power module controller and the power module are communicated through a CAN bus.
The working modes of the power module comprise an independent working mode and a cooperative control mode; when the power modules work in a cooperative control mode, the power module controller generates synchronous control signals, and the power modules are controlled through the CAN bus to realize cooperative work of a plurality of power modules.
The power module controller generates synchronous control signals and control mode switching instructions according to control instructions of the flexible interconnection controllers of the areas, and the control modes comprise a constant voltage constant frequency control mode, a constant power control mode and a constant direct current voltage control mode.
The power module controller adjusts the number of power modules put into operation according to the output power of the current modularized converter, and reduces the electric energy conversion loss by equally dividing the total output power of the converter by each power module.
The total rated power of the power module put into operation is more than 1.2 times of the output power of the modularized converter.
When the working state of the power module is abnormal, the power module controller disconnects the power module with abnormal working state, and sends the information of the power module with abnormal working state to the flexible interconnection controller of the platform area.
The modular converter comprises a power module controller and a modular converter formed by a plurality of power modules, wherein the circuit topology of the power modules comprises a two-level converter circuit topology and a neutral point clamping three-level converter circuit topology, the power modules are connected in parallel to form the modular converter, and the total power of the parallel power modules is not less than the design rated power of the modular converter; the alternating-current side of the modularized converter is connected with the load of the transformer area through an alternating-current breaker, so that power transmission is realized.
The invention and the preferable scheme thereof have the following advantages or beneficial effects:
the invention is used for the flexible interconnection device of the transformer area, and the modularized converter is formed by a plurality of power modules, so that the capacity can be flexibly configured, and the manufacturing cost is reduced. Meanwhile, through cooperative control of the flexible interconnection controllers and the power module controllers of the transformer areas, output characteristic adjustment and flexible control of the working number of the power modules are achieved, and the operation efficiency and reliability of the system are improved.
Drawings
The invention is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a schematic diagram of a two-bay flexible interconnect system in accordance with an embodiment of the present invention;
FIG. 2 is a diagram showing the relationship between the number of power modules and the total output power of the modular converter according to an embodiment of the present invention.
Detailed Description
Hereinafter, specific embodiments of the present application will be described in detail with reference to the accompanying drawings, and according to these detailed descriptions, those skilled in the art can clearly understand the present application and can practice the present application. Features from various embodiments may be combined to obtain new implementations or to replace certain features from certain embodiments to obtain other preferred implementations without departing from the principles of the present application.
In order to make the features and advantages of the present patent more comprehensible, embodiments accompanied with figures are described in detail below:
as shown in the figure, the control method of the modularized converter for the flexible interconnection device of the platform area comprises the flexible interconnection controller of the platform area and the modularized converter which is composed of a power module controller and at least one power module; the flexible interconnection controller of the platform area is used for controlling the power, voltage and operation mode switching of all the modularized converters in the flexible interconnection device of the platform area; the power module controller generates a synchronous control signal to realize the regulation of the output characteristics of the modularized converter or control the running number of the power modules; the flexible interconnection controller of the station area is connected with the power module controller through a communication link, and the communication mode of the communication link comprises a CAN bus, a network cable and a control cable; the power module controller and the power module are communicated through a CAN bus.
The working modes of the power module comprise an independent working mode and a cooperative control mode; when the power modules work in a cooperative control mode, the power module controller generates synchronous control signals, and the power modules are controlled through the CAN bus to realize cooperative work of a plurality of power modules.
The power module controller generates synchronous control signals and control mode switching instructions according to control instructions of the flexible interconnection controllers of the areas, and the control modes comprise a constant voltage constant frequency control mode, a constant power control mode and a constant direct current voltage control mode.
The power module controller adjusts the number of power modules put into operation according to the output power of the current modularized converter, and reduces the electric energy conversion loss by equally dividing the total output power of the converter by each power module.
The total rated power of the power module put into operation is more than 1.2 times of the output power of the modularized converter.
When the working state of the power module is abnormal, the power module controller disconnects the power module with abnormal working state, and sends the information of the power module with abnormal working state to the flexible interconnection controller of the platform area.
The modular converter comprises a power module controller and a modular converter formed by a plurality of power modules, wherein the circuit topology of the power modules comprises a two-level converter circuit topology and a neutral point clamping three-level converter circuit topology, the power modules are connected in parallel to form the modular converter, and the total power of the parallel power modules is not less than the design rated power of the modular converter; the alternating-current side of the modularized converter is connected with the load of the transformer area through an alternating-current breaker, so that power transmission is realized.
Examples:
as shown in fig. 1, the schematic diagram of the two-area flexible interconnection system in this embodiment includes 1 area flexible interconnection controller and 2 modularized converters, each modularized converter is composed of 8 power modules, and the power modules adopt neutral point clamped three-level topology. The flexible interconnection controller of the platform area is used for controlling the power, voltage and operation mode switching of all the modularized converters in the flexible interconnection device of the platform area. The power module controller generates a synchronous control signal to realize the regulation of the output characteristics of the modularized converter. The communication mode of the flexible interconnection controller of the platform area and the power module controller adopts a network cable, and the power module controller and the power module communicate through a CAN bus.
And the 2 power module controllers generate synchronous control signals and control mode switching instructions according to the control instructions of the flexible interconnection controllers of the areas. The power module controller generates synchronous control signals, the output power of the power module is controlled through the CAN bus, and the power module has an independent working mode and a cooperative control mode.
The power module controller adjusts the working quantity of the power module according to the output power of the current modularized converter, and reduces the electric energy conversion loss. The relation between the number of power modules and the total output power of the modularized converter is shown in fig. 2, in this embodiment, the number of power modules is 8, and the power margin of the modularized converter is 1 power of the power modules. When the working state of the power module is abnormal, the abnormal power module is disconnected by the power module controller, and the abnormal power module information is sent to the flexible interconnection controller of the platform area.
While the invention has been described with reference to the preferred embodiments, it should be noted that modifications and adaptations to those embodiments may occur to one skilled in the art without departing from the principles of the present patent and are intended to be within the scope of the present patent.
The present invention is not limited to the above-mentioned preferred embodiments, and any person can obtain other modular converters and control methods for the flexible interconnection device of the platform area in various forms under the teaching of the present invention, and all equivalent changes and modifications made according to the scope of the present invention should be covered by the present invention.
Claims (7)
1. The control method of the modularized converter for the flexible interconnection device of the transformer area is characterized by comprising the following steps of: the control method comprises a flexible interconnection controller of a platform area and a modularized converter which is composed of a power module controller and at least one power module; the flexible interconnection controller of the platform area is used for controlling the power, voltage and operation mode switching of all the modularized converters in the flexible interconnection device of the platform area; the power module controller generates a synchronous control signal to realize the regulation of the output characteristics of the modularized converter or control the running number of the power modules; the flexible interconnection controller of the station area is connected with the power module controller through a communication link, and the communication mode of the communication link comprises a CAN bus, a network cable and a control cable; the power module controller and the power module are communicated through a CAN bus.
2. The control method of a modular converter for a flexible interconnection device of a bay as claimed in claim 1, wherein: the working modes of the power module comprise an independent working mode and a cooperative control mode; when the power modules work in a cooperative control mode, the power module controller generates synchronous control signals, and the power modules are controlled through the CAN bus to realize cooperative work of a plurality of power modules.
3. The control method of a modular converter for a flexible interconnection device of a bay as claimed in claim 2, wherein: the power module controller generates synchronous control signals and control mode switching instructions according to control instructions of the flexible interconnection controllers of the areas, and the control modes comprise a constant voltage constant frequency control mode, a constant power control mode and a constant direct current voltage control mode.
4. The control method of a modular converter for a flexible interconnection device of a bay as claimed in claim 2, wherein: the power module controller adjusts the number of power modules put into operation according to the output power of the current modularized converter, and reduces the electric energy conversion loss by equally dividing the total output power of the converter by each power module.
5. The method for controlling a modular converter for a flexible interconnection apparatus of a bay as claimed in claim 4, wherein: the total rated power of the power module put into operation is more than 1.2 times of the output power of the modularized converter.
6. The control method of a modular converter for a flexible interconnection device of a bay as claimed in claim 2, wherein: when the working state of the power module is abnormal, the power module controller disconnects the power module with abnormal working state, and sends the information of the power module with abnormal working state to the flexible interconnection controller of the platform area.
7. A modular converter for flexible interconnection device in district, its characterized in that: the modularized converter comprises a power module controller and also comprises a modularized converter formed by a plurality of power modules, wherein the circuit topology of the power modules comprises a two-level converter circuit topology and a neutral point clamping three-level converter circuit topology, the plurality of power modules are connected in parallel to form the modularized converter, and the total work of the parallel power modules is not less than the design rated power of the modularized converter; the alternating-current side of the modularized converter is connected with the load of the transformer area through an alternating-current breaker, so that power transmission is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310163490.6A CN116316774A (en) | 2023-02-24 | 2023-02-24 | Modular converter for flexible interconnection device of transformer area and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310163490.6A CN116316774A (en) | 2023-02-24 | 2023-02-24 | Modular converter for flexible interconnection device of transformer area and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116316774A true CN116316774A (en) | 2023-06-23 |
Family
ID=86791697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310163490.6A Pending CN116316774A (en) | 2023-02-24 | 2023-02-24 | Modular converter for flexible interconnection device of transformer area and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116316774A (en) |
-
2023
- 2023-02-24 CN CN202310163490.6A patent/CN116316774A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113043893B (en) | Charging system for battery changing station or energy storage station | |
| EP3965245A1 (en) | Multi-port energy router, and control system and control method thereof | |
| CN102386635B (en) | The system of the distribution that inverter VAR supports and method | |
| CN108847680B (en) | Alternating current-direct current hybrid power distribution network layered control method based on flexible ring network device | |
| CN109861261B (en) | EMS-based power balance control method and energy storage control system for energy storage converter | |
| CN214674375U (en) | Multi-terminal offshore wind power flexible direct current and energy storage cooperative grid-connected system | |
| CN111697591B (en) | Honeycomb multi-station fusion power distribution network system and operation control method thereof | |
| CN104113280A (en) | Serial-connection-type photovoltaic square matrix | |
| CN112366748A (en) | Wind storage combined wind power converter and control method thereof | |
| CN117614047B (en) | Medium-voltage direct-hanging data center power supply system | |
| US11811310B2 (en) | Power conversion system and control method | |
| CN108631293B (en) | DC/DC converter operation mode for DC distribution network and control method | |
| CN112510803B (en) | Single-channel module of airplane distributed power grid structure, power generation system and control method | |
| CN112448414B (en) | Four-port electric energy router and low voltage ride through control method thereof | |
| CN116142011B (en) | Energy storage charging system and current distribution control method | |
| CN210404745U (en) | Flexible multi-state switch device and system | |
| CN209994117U (en) | Energy storage system | |
| CN116316774A (en) | Modular converter for flexible interconnection device of transformer area and control method | |
| CN216959346U (en) | Alternating current-direct current microgrid router system for comprehensive energy station | |
| US20230318435A1 (en) | Power Grid | |
| CN113890103A (en) | Photovoltaic system and control method | |
| CN219268731U (en) | Modularized flexible interconnection device | |
| CN219937955U (en) | Charging and discharging control device of energy storage system of flexible interconnection transformer area | |
| CN220874240U (en) | Intelligent management system for electrochemical energy storage application | |
| CN218783583U (en) | Grid-connected photovoltaic power grid system based on maximum power point tracking |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |