CN113497724A - Communication system and communication method of modular multilevel converter - Google Patents
Communication system and communication method of modular multilevel converter Download PDFInfo
- Publication number
- CN113497724A CN113497724A CN202010202805.XA CN202010202805A CN113497724A CN 113497724 A CN113497724 A CN 113497724A CN 202010202805 A CN202010202805 A CN 202010202805A CN 113497724 A CN113497724 A CN 113497724A
- Authority
- CN
- China
- Prior art keywords
- sub
- communication
- data frame
- frame
- identification information
- 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.)
- Granted
Links
- 238000004891 communication Methods 0.000 title claims abstract description 138
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000872 buffer Substances 0.000 claims description 27
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000010586 diagram Methods 0.000 description 6
- 239000013307 optical fiber Substances 0.000 description 6
- 210000004027 cell Anatomy 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 210000000329 smooth muscle myocyte Anatomy 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/12—Discovery or management of network topologies
-
- 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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Small-Scale Networks (AREA)
- Communication Control (AREA)
Abstract
The application provides a communication system and a communication method of a modular multilevel converter. The communication system comprises valve base control equipment and at least one submodule group, wherein the valve base control equipment is used as main control equipment of the modular multilevel converter and comprises at least four pairs of communication ports; each submodule group comprises two groups of submodule units, the submodule units control and monitor submodules of the modularized multi-level converter, the four submodule units at two ends of the submodule groups are respectively connected with four pairs of communication ports of the valve base control equipment, each group of submodule units are sequentially connected in series, the two groups of submodule units are equal in number, and the two groups of submodule units correspond to the submodule units in a direct connection mode.
Description
Technical Field
The application relates to the technical field of communication of a converter control system, in particular to a communication system and a communication method of a modular multilevel converter.
Background
The high-voltage flexible direct-current transmission system is particularly suitable for long-distance transmission, wind power integration, submarine transmission and other application occasions, and has unique advantages compared with alternating-current transmission and traditional direct-current transmission.
In a high-voltage flexible direct-current transmission system based on the modular multilevel converter, the higher the voltage grade is, the more the number of sub-modules is. In order to obtain better harmonic characteristics and to provide sufficient redundancy for the system, the converter valves are typically built up of a number of sub-modules in cascade. The number of the sub-modules of one bridge arm cascade can reach more than 200, the number of the sub-modules of three-phase six bridge arms is larger, and each sub-module is provided with a current converter control sub-module unit (SMC) for control and monitoring.
The valve control device of the valve base control equipment (VBC) is a main control device in the system, and needs to communicate with all SMCs, and all SMCs need to feed back state information to the VBC. In addition, the requirement on the real-time density and the reliability of a communication system of the converter control system is high. If a communication system which gives consideration to both the system complexity and the communication reliability can be designed, the robustness of the whole system is improved.
The application form of the current communication architecture is mainly that VBC and SMC modules realize point-to-point optical communication in a star-group topology, for example, in the case of one VBC controlling a single-bridge arm SMC, a VBC single device must have hundreds of optical communication interfaces, and communicate with SMC through the same number of communication optical fibers. For flexible and straight systems with larger capacity and more SMC, the density of VBC device communication interfaces is further increased, and the hardware design and heat dissipation design face challenges.
In addition, the communication function of the VBC and the SMC depends on each link of the whole communication link, and any link including a communication interface and an optical fiber fails to operate normally. In the conventional networking mode, the number of communication interfaces and optical fiber data is so large that the fault risk of the system is further increased.
Disclosure of Invention
The embodiment of the application provides a communication system of modularization multilevel transverter, includes: the valve base control equipment is used as the main control equipment of the modular multilevel converter and comprises at least four pairs of communication ports; each sub-module group comprises two teams of sub-module units, the sub-module units control and monitor sub-modules of the modular multilevel converter, the four sub-module units at two ends of the sub-module group are respectively connected with four pairs of communication ports of the valve base control equipment, the sub-module units of each team are sequentially connected in series, the number of the sub-module units of the two teams is equal, and the sub-module units of the two teams are directly connected.
According to some embodiments, the sub-module unit comprises at least three pairs of communication interfaces.
According to some embodiments, the sub-module unit further includes a sending buffer corresponding to each of the communication interfaces, and data received from each of the communication interfaces is filled in sending buffers of the other two communication interfaces; and filling the state information in the feedback state information data frame fed back to the valve base control equipment into the sending buffer areas of all the communication interfaces.
According to some embodiments, the sub-module unit further includes a fixed-depth queue, and the fixed-depth queue stores unique identification information of the latest time corresponding to each communication interface, the unique identification information is a combination of a source device identifier in a control command data frame from the valve base control device or a feedback state information data frame from the sub-module unit and a sequence number, and the sequence number is incremented every time the sequence number is sent, and the sequence number is zeroed after the sequence number reaches the maximum value.
According to some embodiments, when the sub-module unit sends one of the feedback status information data frames, the unique identification information of the communication interface is added into a queue, and the oldest identification information in the queue is removed.
According to some embodiments, the sub-module unit further includes a sending controller, which is independently configured for each communication interface, and the sending controller acquires a frame to be sent from a corresponding sending buffer area, and checks whether the unique identification information of the frame to be sent is repeated in the identification information queue of the corresponding communication interface, if the unique identification information of the frame to be sent is repeated, the frame to be sent is not sent, and is directly discarded from the buffer, and if the unique identification information of the frame to be sent is not repeated, the frame to be sent is sent through the corresponding communication port.
According to some embodiments, when the valve base control device receives a data frame from the communication port, the data frame is identified as a control command data frame through the source device identification and is directly discarded.
The embodiment of the present application further provides a communication method of a communication system of the modular multilevel converter, including: the valve base control equipment sends a control command data frame to the sub-module unit; and receiving a feedback state information data frame from the sub-module unit.
According to some embodiments, the valve base control apparatus transmitting a control command data frame to the sub-module unit includes: and the valve base control equipment sends a control command data frame to the sub-module unit once according to a fixed time period.
According to some embodiments, the transmission controller of the sub-module unit obtains a frame to be transmitted from a corresponding transmission buffer area, and checks whether the unique identification information of the frame to be transmitted is repeated in the identification information queue of the corresponding communication interface, if the repeated identification information exists, the frame to be transmitted is not transmitted, and is directly discarded from the buffer, if the repeated identification information does not exist, the frame to be transmitted is transmitted through the corresponding communication port.
According to some embodiments, the control command data frame or the feedback status information data frame each comprise distinguishable source device identifications, none of which are repeated.
According to some embodiments, the control command data frame or the feedback status information data frame comprises independent sequence number information, and the sequence number is incremented every time the control command data frame or the feedback status information data frame is sent, and the sequence number is zeroed after reaching a maximum value.
According to some embodiments, the combination of the source device identification and the sequence number is a unique identification information of the control command data frame or the feedback status information data frame.
According to some embodiments, the valve base control device sends the same control command data frame to the four pairs of communication ports to which the sub-module cell groups are connected.
According to some embodiments, the communication ports do not forward any received frame of the feedback status information data between them.
According to the technical scheme provided by the embodiment of the application, an optimized network topology and communication method are used, when the number of each group of sub-module units reaches four, the ratio of the number of the sub-module units to the number of the communication interfaces of the valve base control equipment is 1: 1, as in the conventional star point-to-point topology. When the number of each group of sub-module units exceeds four, the number of communication interfaces of the valve base control equipment is less than that of the conventional scheme for the specified number of sub-modules, so that the complexity of hardware design and the power consumption of a system are reduced. In addition, the redundant backup function of communication between the valve base control equipment and the sub-module control units can be realized, the communication interfaces and optical fibers of the sub-module units related in each sub-module group, and the communication functions of other normal sub-modules and the valve base control equipment cannot be influenced when the valve base control equipment and four corresponding communication interfaces of the group appear in all links below three fault points.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a communication system topology of a modular multilevel converter according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a communication system of a modular multilevel converter according to an embodiment of the present application.
Fig. 3 is a schematic flowchart of a communication method of a modular multilevel converter according to an embodiment of the present application.
Fig. 4 is a schematic diagram illustrating an update of a data buffer of a sending port of a sub-module unit according to an embodiment of the present disclosure.
Fig. 5 is a schematic diagram of a sub-module unit sending port update identification information queue according to an embodiment of the present application.
Fig. 6 is a schematic diagram of a control command data frame format and a sub-module status frame format according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be understood that the terms "first", "second", etc. in the claims, description, and drawings of the present application are used for distinguishing between different objects and not for describing a particular order. The terms "comprises" and "comprising," when used in the specification and claims of this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Fig. 1 is a schematic diagram of a communication system topology of a modular multilevel converter according to an embodiment of the present application.
As shown in fig. 1, the modular multilevel converter includes six legs of three phases. The communication system of the modular multilevel converter comprises a valve base control device VBC and at least one submodule group. The valve base control equipment VBC is used as the master control equipment of the modular multilevel converter and comprises at least four pairs of communication ports. Every submodule group includes two teams of submodule unit SMC, submodule group SMC control and the many level transverter of monitoring modularization's submodule piece, four submodule unit SMC at submodule group both ends are connected with four pairs of communication ports of valve base control equipment VBC respectively, and every team's submodule unit is series connection in proper order, and two teams of submodule unit quantity equals, the corresponding submodule unit lug connection of two teams.
According to some embodiments, a single phase of a modular multilevel converter requires 144 sub-modular units. 144 sub-module units are divided into 12 sub-module groups. Denoted as group 1 through group 12, as shown in fig. 2.
Taking group 1 as an example, group 1 is identified as 110, 12 sub-module units 111 are divided into two groups A/B, 6 sub-module units of group 1 group A are respectively named as 1-A-1 to 1-A-6, and 6 sub-module units of group 1 group B are respectively named as 1-B-1 to 1-B-6.
The sub-module units 1-A-1 to 1-A-6 are sequentially connected in series through communication ports, and the communication ports 101 and 102 of the valve base control equipment are respectively connected with the 1-A-1 and the 1-A-6 at the two ends. The connection relationship of the submodules 1-B-1 to 1-B-6 is the same as the former. And the corresponding sub-module units between the team A and the team B are directly connected through a communication port.
In this embodiment, the total number of the single-phase sub-module units is 144, which are divided into 12 groups, and the valve base control device VBC realizes a communication function with the 144 sub-module units SMC through 48 pairs of communication interfaces. And communication interfaces of the valve base control equipment VBC and the sub-module unit SMC are 1000M optical fiber Ethernet.
Optionally, the sub-module unit SMC includes at least three pairs of communication interfaces.
Optionally, the sub-module unit further includes a sending buffer, and corresponding to each communication interface, data received from any communication interface is filled into the sending buffers of the other two communication interfaces, and the status information in the feedback status information data frame fed back to the valve base control device is filled into the sending buffers of all the communication interfaces.
Optionally, the sub-module unit further includes a fixed-depth queue, where the fixed-depth queue stores unique identification information of the latest time corresponding to each communication interface, and when the sub-module unit sends a feedback status information data frame, adds the unique identification information of the communication interface into the queue, and removes the oldest identification information in the queue.
The unique identification information is the combination of the source equipment identifier in a control command data frame from the valve base control equipment or a feedback state information data frame from the sub-module unit and the serial number, and the serial number is increased progressively each time the serial number is sent, and the serial number returns to zero after reaching the maximum value.
Optionally, the sub-module unit further includes a sending controller, which is independently configured corresponding to each communication interface, and the sending controller acquires a frame to be sent from the corresponding sending buffer area, and checks whether the unique identification information of the frame to be sent is repeated in the identification information queue of the corresponding communication interface, if the unique identification information of the frame to be sent is repeated, the frame to be sent is not sent, and the frame to be sent is directly discarded from the buffer, if the unique identification information of the frame to be sent is not repeated, the frame to be sent is sent through the corresponding communication port.
Fig. 3 is a schematic flowchart of a communication method of a modular multilevel converter according to an embodiment of the present application.
In S110, the valve base control apparatus transmits a control command data frame to the sub-module unit.
According to some embodiments, the valve base control device is a master control device and the sub-module unit is an execution device. The valve base control equipment executes control tasks according to a fixed time period of 100us, and sends control command data frames to the sub-module unit once every period.
According to some embodiments, a control command data frame sent by a valve base control device includes four fields, a source device identification, a frame sequence number, a control command, and a frame check.
In S120, the valve base control apparatus receives the feedback status information data frame from the sub-module unit.
And the sub-module unit receives the control command and feeds back the state information data frame to the valve base control equipment. Similar to the control command data frame, the feedback status information data frame sent by the sub-module unit also includes four fields including the source device identifier, the frame number, the status information, and the frame check, as shown in fig. 6.
The control command data frame or the feedback state information data frame comprises distinguishable source equipment identifications, and the source equipment identifications are not repeated.
The source device identification of the valve base control device is 0x 1000. And the source equipment identification of the sub-module unit is coded according to 0xWXYZ, wherein the value range of W is A-C and respectively represents A/B/C three phases. X represents the group of the sub-modules, the value range is from 0-F, and represents the groups 1 to 16; YZ is the specific position of the sub-module unit within the group, where 0x00-0x7F represents row A sub-module units 1-128; 0x80-0xFF shows B rows of sub-module cells 1-128.
The control command data frame or the feedback state information data frame comprises independent serial number information, the serial number is increased progressively every time the control command data frame or the feedback state information data frame is sent, the serial number is 16-bit unsigned number, the value range is from 0 to 65535, and when the serial number is increased progressively to 65535, the sequence number is reset to zero after the sequence number reaches the maximum value.
In this embodiment, the valve base control apparatus and the sub-module unit each transmit a control command or status information at a fixed period of 100us, and therefore the sequence number in the frame is cycled once, which takes 6.5536 seconds.
The sub-module unit SMC transmits the module status information and also forwards other received data frames. Each communication interface of the sub-module unit SMC is provided with an independent send buffer, as shown in fig. 4. The data frame received from any communication interface will fill in the sending buffer of all other communication interfaces. The local state information sent by the sub-module unit to the valve base control equipment is filled in the sending cache regions of all the communication interfaces.
A submodule status data frame is denoted 201. 202 denotes a data frame received by the submodule from the communication port 1. 203 denotes a data frame received by the submodule from the communication port 2. 204 represents a data frame received by the submodule from communication port 2. 211. 212, 213 denote the send buffers of the submodule communication interfaces 1, 2, 3, respectively. 221 represents the updated transmission buffer of communication interface 1, which includes the status frame of the sub-module, the reception frame of communication interface 2, and the reception frame of communication interface 3. 222, which represents the updated transmission buffer of communication interface 2, includes the status frame of the sub-module, the received frame of communication interface 1, and the received frame of communication interface 3. Reference numeral 223 denotes a situation after the communication interface 3 sends the buffer update, which includes the submodule status frame, the communication interface 1 receive frame, and the communication interface 2 receive frame.
The combination of the source device identification and the sequence number is the unique identification information of the control command data frame or the feedback state information data frame. The combination of the source device identifier and the sequence number included in the data frame transmitted in the network is data with a length of 4 bytes, which is used as the unique identification information of the frame, as shown in fig. 5. The sub-module unit sets an identification information queue with the depth of 16 for each communication interface and stores the identification information of the most recently transmitted data frame. When any communication interface transmits a data frame, the identification information is added into the queue, and the earliest identification information in the queue is removed.
Each communication interface of the sub-module unit is provided with an independent sending controller, the sending controller acquires a frame to be sent from a corresponding sending cache, and whether the unique identification information of the frame is repeated in the identification information queue of the corresponding communication interface is checked. If repeated identification information exists, the current frame is not sent and is directly discarded from the buffer, and if the repeated identification information does not exist, the current frame is sent through the communication interface.
And the valve base control equipment sends control command data frames, and the contents of the control command data frames sent by the 4 communication ports connected with each group of sub-module unit groups are the same. These identical control command frames are transmitted in the network according to the above-described rules, so that each sub-module unit may receive a plurality of identical control command data frames.
When the valve base control equipment receives the data frame from the network, if the source equipment is identified as the control command data frame through the identifier, the data frame is directly discarded.
When the valve base control equipment receives a data frame from a network, if the source equipment is identified as a sub-module status data frame through the identifier, the frame is submitted to an application program, and any received data frame is not forwarded among ports of the valve base control equipment.
As shown in fig. 5, 300 indicates the current identification information queue of the present interface, and includes 16 elements, i.e., identification information 1-identification information 16. 301 is identification information contained in a data frame to be transmitted by the present interface, and is composed of a source device identifier and a frame number of the frame. 302 is the newest element in the present interface identification information queue, and the content is identification information 1. 303 is the latest element in the present interface identification information queue, and the content is identification information 16. 310 denotes an identification information queue after the present interface finishes sending the current frame, and the identification information queue includes 16 elements, whose contents are identification information 0 to identification information 15. And 311, after the current frame is sent by the interface, identifying the latest element in the information queue, where the content of the latest element is identification information 0, and the identification information includes the source device identifier and the frame number of the currently sent frame. 312 is the oldest identification information 16 that is removed from the queue after the present interface completes the transmission of the current frame.
According to the technical scheme provided by the embodiment of the application, an optimized network topology and communication method are used, when the number of each group of sub-module units reaches four, the ratio of the number of the sub-module units to the number of the communication interfaces of the valve base control equipment is 1: 1, as in the conventional star point-to-point topology. When the number of each group of sub-module units exceeds four, the number of communication interfaces of the valve base control equipment is less than that of the conventional scheme for the specified number of sub-modules, so that the complexity of hardware design and the power consumption of a system are reduced. In addition, the redundant backup function of communication between the valve base control equipment and the sub-module control units can be realized, the communication interfaces and optical fibers of the sub-module units related in each sub-module group, and the communication functions of other normal sub-modules and the valve base control equipment cannot be influenced when the valve base control equipment and four corresponding communication interfaces of the group appear in all links below three fault points.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the description of the embodiments is only intended to facilitate the understanding of the methods and their core concepts of the present application. Meanwhile, a person skilled in the art should, according to the idea of the present application, change or modify the embodiments and applications of the present application based on the scope of the present application. In view of the above, the description should not be taken as limiting the application.
Claims (15)
1. A communication system for a modular multilevel converter, comprising:
the valve base control equipment is used as the master control equipment of the modular multilevel converter and comprises at least four pairs of communication ports;
the four sub-module units at two ends of the sub-module group are respectively connected with four pairs of communication ports of the valve base control equipment, the sub-module units of each sub-module group are sequentially connected in series, the number of the sub-module units of the two sub-module groups is equal, and the corresponding sub-module units of the two sub-module groups are directly connected.
2. The communication system of claim 1, wherein the sub-module unit comprises at least three pairs of communication interfaces.
3. The communication system of claim 2, wherein the sub-module unit further comprises:
a sending buffer area corresponding to each communication interface, wherein the data received from each communication interface can be filled in the sending buffer areas of other two communication interfaces; and filling the state information in the feedback state information data frame fed back to the valve base control equipment into the sending buffer areas of all the communication interfaces.
4. The communication system of claim 3, wherein the sub-module unit further comprises:
and the queue with the fixed depth corresponds to each communication interface, the queue with the fixed depth stores the unique identification information of the latest time, the unique identification information is the combination of the source equipment identifier in a control command data frame from the valve base control equipment or a feedback state information data frame from the sub-module unit and a serial number, and the serial number is gradually increased once the serial number is sent, and then the serial number returns to zero after reaching the maximum value.
5. The communication system of claim 4, wherein the sub-module unit queues the unique identification information of the communication interface while removing the oldest identification information in the queue when transmitting one of the feedback status information data frames.
6. The communication system of claim 5, wherein the sub-module unit further comprises:
the transmission controller is independently arranged corresponding to each communication interface, acquires a frame to be transmitted from a corresponding transmission buffer area, and checks whether the unique identification information of the frame to be transmitted is repeated in an identification information queue of the corresponding communication interface, if the unique identification information of the frame to be transmitted exists, the frame to be transmitted is not transmitted, and is directly discarded from the buffer, and if the unique identification information of the frame to be transmitted does not exist, the frame to be transmitted is transmitted through the corresponding communication port.
7. The communication system of claim 4, wherein the valve base control device, upon receiving a data frame from the communication port, recognizes the data frame as a control command data frame by the source device identification and discards the data frame directly.
8. A communication method of a communication system of a modular multilevel converter according to any of claims 1 to 7, comprising:
the valve base control equipment sends a control command data frame to the sub-module unit;
and receiving a feedback state information data frame from the sub-module unit.
9. The communication method of claim 8, wherein the valve base control device sending a control command data frame to the sub-module unit comprises:
and the valve base control equipment sends a control command data frame to the sub-module unit once according to a fixed time period.
10. The communication method according to claim 8, wherein the transmission controller of the sub-module unit obtains a frame to be transmitted from a corresponding transmission buffer area, and checks whether the unique identification information of the frame to be transmitted is duplicated in the identification information queue of the corresponding communication interface, if duplicated identification information exists, the frame to be transmitted is not transmitted, and is directly discarded from the buffer, if duplicated identification information does not exist, the frame to be transmitted is transmitted through the corresponding communication port.
11. A method of communication according to claim 8, wherein the control command data frame or the feedback status information data frame each contain distinguishable source device identifications, none of which are repeated.
12. The communication method according to claim 11, wherein the control command data frame or the feedback status information data frame includes independent sequence number information, and the sequence number is incremented every time the control command data frame or the feedback status information data frame is transmitted, and the sequence number is zeroed after reaching a maximum value.
13. The communication method according to claim 12, wherein the combination of the source device identification and the sequence number is unique identification information of the control command data frame or the feedback status information data frame.
14. The communication method according to claim 11, wherein the valve base control device transmits the same control command data frame to four pairs of communication ports to which the sub-module cell groups are connected.
15. The communication method according to claim 11, wherein no received frame of the feedback status information data is forwarded between the communication ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202805.XA CN113497724B (en) | 2020-03-20 | 2020-03-20 | Communication system and communication method of modularized multi-level converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202805.XA CN113497724B (en) | 2020-03-20 | 2020-03-20 | Communication system and communication method of modularized multi-level converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113497724A true CN113497724A (en) | 2021-10-12 |
| CN113497724B CN113497724B (en) | 2024-02-06 |
Family
ID=77993795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010202805.XA Active CN113497724B (en) | 2020-03-20 | 2020-03-20 | Communication system and communication method of modularized multi-level converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113497724B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114584531A (en) * | 2022-03-17 | 2022-06-03 | 南京南瑞继保电气有限公司 | Method for automatically learning address of submodule controller of multilevel converter system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118019A (en) * | 2011-01-14 | 2011-07-06 | 中国电力科学研究院 | Modularized multi-level converter sub-module control and protection method |
| CN103684014A (en) * | 2013-12-20 | 2014-03-26 | 浙江省电力设计院 | Method applicable to communication between sub-module controller and upper layer controller of modular multi-level converter |
| CN103869779A (en) * | 2014-03-12 | 2014-06-18 | 南京南瑞继保电气有限公司 | Communication framework and method suitable for modularized multi-level converter control system |
| CN105204482A (en) * | 2015-10-31 | 2015-12-30 | 南京南瑞继保电气有限公司 | Cascaded communication architecture applicable to modular multilevel converter control system |
| CN106655846A (en) * | 2016-11-24 | 2017-05-10 | 南方电网科学研究院有限责任公司 | Modular multi-level converter control system and control method |
-
2020
- 2020-03-20 CN CN202010202805.XA patent/CN113497724B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118019A (en) * | 2011-01-14 | 2011-07-06 | 中国电力科学研究院 | Modularized multi-level converter sub-module control and protection method |
| CN103684014A (en) * | 2013-12-20 | 2014-03-26 | 浙江省电力设计院 | Method applicable to communication between sub-module controller and upper layer controller of modular multi-level converter |
| CN103869779A (en) * | 2014-03-12 | 2014-06-18 | 南京南瑞继保电气有限公司 | Communication framework and method suitable for modularized multi-level converter control system |
| WO2015135389A1 (en) * | 2014-03-12 | 2015-09-17 | 南京南瑞继保电气有限公司 | Communication architecture and method suitable for modular multi-level converter control system |
| CN105204482A (en) * | 2015-10-31 | 2015-12-30 | 南京南瑞继保电气有限公司 | Cascaded communication architecture applicable to modular multilevel converter control system |
| CN106655846A (en) * | 2016-11-24 | 2017-05-10 | 南方电网科学研究院有限责任公司 | Modular multi-level converter control system and control method |
Non-Patent Citations (1)
| Title |
|---|
| 罗程;赵成勇;张宝顺;倪晓军;翟晓萌;郭春义;: "MMC控制系统时序逻辑与子模块故障监测", 电力自动化设备, no. 05 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114584531A (en) * | 2022-03-17 | 2022-06-03 | 南京南瑞继保电气有限公司 | Method for automatically learning address of submodule controller of multilevel converter system |
| CN114584531B (en) * | 2022-03-17 | 2023-11-17 | 南京南瑞继保电气有限公司 | Method for automatically learning address by sub-module controller of multi-level converter system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113497724B (en) | 2024-02-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Clark et al. | An introduction to local area networks | |
| JP4822997B2 (en) | Communication apparatus and communication method | |
| US9596191B2 (en) | Network relay system and network relay device | |
| CN104683015B (en) | A kind of unmanned aerial vehicle station bus system | |
| US20080089245A1 (en) | Automated multiple-instance spanning tree reconfiguration | |
| US20120281525A1 (en) | METHOD AND SYSTEM FOR PRIORITY BASED (1:1)n ETHERNET PROTECTION | |
| JP2000092125A (en) | Packet transfer device, repeater, communication network, packet transfer method and switching method for communication network | |
| CN111193971B (en) | Machine learning-oriented distributed computing interconnection network system and communication method | |
| CN113497724A (en) | Communication system and communication method of modular multilevel converter | |
| JP4809758B2 (en) | Network relay device and method for controlling network relay device | |
| CN103957477A (en) | Power-grid-service-oriented optical switching method and network | |
| US9426058B2 (en) | Transmission equipment and transmission method | |
| CN106533771B (en) | Network equipment and control information transmission method | |
| CN108462537B (en) | Method for realizing one-master multi-slave communication | |
| CN100571219C (en) | A kind of load balancing router and the equipment, the method that realize load balancing | |
| CN106411616B (en) | A kind of device and method by 1553B bus management ethernet terminal | |
| CN114640184A (en) | Master-slave self-adaptive energy storage device and control method | |
| CN211454255U (en) | Device for automatically switching main server and standby server | |
| CN208971553U (en) | Based on point-to-point communication network system | |
| CN113300756B (en) | Interstar link mesh routing system based on CCSDS specification | |
| CN113676405B (en) | Load sharing-based rapid link master-slave switching distributed system and method | |
| CN112512066B (en) | Satellite-borne high-low speed mixed data transmission system | |
| CN102804692B (en) | Network System, network device and link loss forwarding method | |
| CN113949454B (en) | Optical fiber/E1 conversion equipment and safety and stability control system inter-station communication method | |
| CN214670196U (en) | Offshore wind power monitoring system based on hybrid networking |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |