CN112202348A - Interface device and communication method for converter valve and valve base control equipment - Google Patents
Interface device and communication method for converter valve and valve base control equipment Download PDFInfo
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- CN112202348A CN112202348A CN202011043667.1A CN202011043667A CN112202348A CN 112202348 A CN112202348 A CN 112202348A CN 202011043667 A CN202011043667 A CN 202011043667A CN 112202348 A CN112202348 A CN 112202348A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- 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
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
- H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
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Abstract
The invention discloses an interface device and a communication method for a converter valve and valve base control equipment, wherein the interface device comprises: the first communication module receives a submodule control information data packet; the second communication module receives the running state information sent by the corresponding sub-module; the control module analyzes the sub-module control information data packet to obtain sub-module control information and sends the sub-module control information to the corresponding sub-module; combining the operation state information sent by the corresponding sub-modules, and sending sub-module operation state information data packets to the corresponding bridge arm control units; the power supply interface module supplies power to the first communication module, the second communication module and the control module. According to the invention, the data information of the bridge arm control unit and each sub-module is interacted sequentially through the first communication module, the control module and the second communication module, so that a large number of optical fiber routing from a secondary control room to a valve hall is saved, later-period maintenance is facilitated, and the reliability of communication between the valve base control equipment and the valve tower sub-module is effectively improved.
Description
Technical Field
The invention relates to the technical field of flexible direct current power transmission, in particular to an interface device and a communication method for a converter valve and valve base control equipment.
Background
In a flexible direct-current transmission system, Valve base control equipment (VBC) is used as a middle link for connecting pole control protection equipment and a converter Valve and is mainly responsible for realizing operation control and safety protection of all sub-modules, a whole bridge arm and even a whole system of the converter Valve. Compared with the conventional direct current with thyristors directly connected in series, the converter valve for flexible direct current power transmission comprises a plurality of submodules consisting of fully-controlled devices IGBT, each submodule needs to be independently controlled, and the number of the required submodules is increased when the voltage level of a power transmission system is higher. In order to realize long-distance synchronous point-to-point communication between a VBC and a plurality of sub-modules, a conventional engineering application method generally comprises the steps of configuring sub-module communication cases inside the VBC, wherein each communication case is connected with a certain number of sub-modules through long-distance optical fibers; in addition, the VBC is far away from the physical position of the converter valve (generally more than 200 meters), so that a great number of long-distance optical cables need to be laid in the topological mode, and the production and installation cost of the converter valve equipment and the operation and maintenance cost of later-period equipment are greatly increased.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defect of high equipment installation and operation and maintenance costs caused by the use of an optical fiber communication mode between the valve base control system and the converter valve in the prior art, so as to provide an interface device and a communication method for the converter valve and the valve base control equipment.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides an interface device for a converter valve and a valve base control device, where the valve base control device includes a plurality of bridge arm control units, the converter valve includes a plurality of bridge arms, each bridge arm includes a plurality of sub-modules, and when one bridge arm control unit controls an operation state of a sub-module of the same bridge arm through at least one interface device, the interface device includes: the bridge arm control device comprises a control module, a power supply interface module, at least one first communication module and a plurality of second communication modules, wherein the first communication module is respectively connected with a bridge arm control unit and a control module and is used for receiving a sub-module control information data packet sent by the bridge arm control unit; the second communication modules correspond to the sub-modules one by one, are respectively connected with the control modules and the corresponding sub-modules, and are used for receiving the running state information sent by the corresponding sub-modules; the control module is used for analyzing the sub-module control information data packet to obtain sub-module control information and sending the sub-module control information to the corresponding sub-module through the second communication module; combining the running state information sent by the corresponding sub-modules, and sending the obtained corresponding sub-module running state information data packet to the corresponding bridge arm control unit through the first communication module; and the power supply interface module is respectively connected with the external power supply, the first communication module, the second communication module and the control module and is used for supplying power to the first communication module, the second communication module and the control module.
In an embodiment, when one bridge arm control unit controls the operating state of the sub-modules of the same bridge arm through a plurality of interface devices, and any one of the plurality of interface devices is a master interface device, the interface device further includes: at least one third communication module, which is connected with the third communication module of the lower interface device in pairs, and is used for communicating with the upper interface device and the lower interface device.
In one embodiment, when the interface device includes at least two first communication modules, all the first communication modules are backup communication modules.
In one embodiment, the interface device is disposed in a shielded enclosure housing for resisting strong electromagnetic interference; when one bridge arm control unit controls the running state of the sub-modules of the same bridge arm through a plurality of interface devices, the plurality of interface devices are arranged at different installation places, or the plurality of interface devices are arranged in the same interface equipment box.
In an embodiment, when one bridge arm control unit controls the operating state of the sub-module of the same bridge arm through a plurality of interface devices, the power supply interface modules of the plurality of interface devices are powered by different external power supplies, or the plurality of power supply interface modules are combined in parallel and powered by the same external power supply.
In one embodiment, when the interface device is installed in the insulation shield of each valve layer of the converter valve tower, the power supply interface module is powered from the power supply of at least one corresponding sub-module; when the interface equipment is installed at the bottom of the converter valve tower or other positions of the converter valve tower, the power supply interface module obtains energy from the power supply of the converter valve hall.
In a second aspect, an embodiment of the present invention provides a communication method for a converter valve and a valve base control device, where based on the interface device of the first aspect, when one bridge arm control unit controls an operating state of a sub-module of the same bridge arm through at least one interface device, the communication method includes: the bridge arm control unit combines the acquired sub-module control information to obtain at least one sub-module control information data packet, and sends the corresponding sub-module control information data packet to the corresponding first communication module; the first communication module sends the sub-module control information data packet to the control module, and the control module sends the sub-module control information to the corresponding sub-module through the second communication module after analyzing the sub-module control information data packet; the control module receives the running state information sent by the sub-modules, combines the running state information sent by the sub-modules, and sends the obtained sub-module running state information data packet to the corresponding bridge arm control unit through the first communication module.
In an embodiment, when one bridge arm control unit controls the operating state of the sub-modules of the same bridge arm through a plurality of interface devices, and any one of the plurality of interface devices is a master interface device, the communication method further includes: the bridge arm control unit combines the control information of the sub-modules connected with each interface device to obtain a plurality of sub-module control information data packets; the bridge arm control unit sends all sub-module control information data packets to a control module of the main interface device through a first communication module of the main interface device; the control module of the main interface device identifies the sub-module control information data packet of the interface device at the current level, and sends the sub-module control information data packets of other interface devices to the control module of the interface device at the next level sequentially through the third communication module of the current level and the third communication module of the interface device at the next level; the control module of the interface device at the next level identifies the sub-module control information data packet of the interface device at the current level, and sends the sub-module control information data packets of other interface devices to the control module of the interface device at the next level sequentially through the third communication module of the interface device at the current level and the third communication module of the interface device at the next level, and so on until the control modules of the interface devices at all levels identify the sub-module control information data packet at the current level.
In one embodiment, the method for communicating the converter valve with the valve base control device further comprises: after the control module of the interface device at each level identifies the sub-module control information data packet at the level, each control module analyzes the sub-module control information data packet at the level to obtain the sub-module control information at the level, and sends the control information to the corresponding sub-module through the second communication module at the level.
In one embodiment, the method for communicating the converter valve with the valve base control device further comprises: the control module of each level of interface device receives the running state information sent by the corresponding sub-module through the second communication module, and combines the running state information of the plurality of sub-modules to obtain a sub-module running state information data packet of the level; the control module of the last level interface device sends the sub-module operation state information data packet of the level to the control module of the upper level interface device through the third communication module of the level and the third communication module of the upper level interface device in sequence; the control module of the upper-level interface device sends the sub-module state information data packet of the level and the data packet sent by the lower level to the control module of the next upper-level interface device sequentially through the third communication module of the level and the third communication module of the next upper-level interface device, and so on until the control module of the main interface device receives the sub-module state information data packets sent by all other interface devices; and the control module of the main interface device sends the sub-module running state information data packet of the current level and the sub-module state information data packets sent by all other interface devices to the bridge arm control unit through the first communication module of the current level.
The technical scheme of the invention has the following advantages:
1. according to the interface device and the communication method for the converter valve and the valve base control equipment, the data information of the bridge arm control unit and the data information of the sub-modules are interacted sequentially through the first communication module, the control module and the second communication module, so that a large number of optical fiber routing from a secondary control room to a valve hall is omitted, the workload of laying optical fibers is reduced, the possibility of breakage of the middle optical fiber is greatly reduced, later-period maintenance is facilitated, and the reliability of communication between the valve base control equipment and the valve tower sub-modules is effectively improved.
2. The invention provides an interface device and a communication method of a converter valve and valve base control equipment.A bridge arm control unit is provided with a plurality of interface devices, one of the interface devices is selected as a main interface device, and a third communication module of each interface device is utilized to realize the interconnection of every two interface devices, after receiving all sub-module control information data packets sent by the bridge arm control unit, the main interface device analyzes the sub-module control information data packets, sends the sub-module control information data packets to other interface devices connected with the main interface device through an extended communication interface, and then transmits the sub-module control information data packets to the other interface devices in an interface equipment box; similarly, after the state information uploaded by the sub-modules is transmitted to each interface device, the main interface device unifies and summarizes the information and then sends the information to the bridge arm control unit, so that the information interaction of each interface device is realized, and the use amount of the long-distance optical fiber communicated between the interface device and the bridge arm control unit is further reduced.
3. According to the interface device of the converter valve and the valve base control equipment, the second communication modules correspond to the sub-modules one by one, each sub-module is connected with the interface device through the independent optical fiber, and a point-to-point parallel communication mode is adopted between each sub-module and the valve base control equipment, so that the state information loss of a certain sub-module is avoided, and the response speed of each sub-module in executing a switching command can be greatly improved.
4. According to the interface device of the converter valve and the valve base control equipment, the interface device is arranged on the valve tower or arranged under the valve tower after being combined, so that interface cabinets required by six bridge arms in a secondary control chamber are saved, and the occupied space and the equipment cost of the valve control equipment in the secondary control chamber are greatly saved.
5. According to the interface device of the converter valve and the valve base control equipment, the interface device works independently and dispersedly on the valve tower or the combined interface device is placed below the valve tower for uniform power supply, and the external power supply is used for uniformly supplying power to the interface device, so that the number of optical fibers between the valve base control equipment and the valve tower is effectively reduced, and the cost can be obviously reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a connection topology diagram of an interface device according to an embodiment of the present invention;
fig. 2 is a block diagram of a specific example of an interface device according to an embodiment of the present invention;
fig. 3 is a block diagram of another specific example of the interface device according to the embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating an installation manner of a single interface device when the single interface device works independently according to an embodiment of the present invention;
fig. 5 is a schematic view illustrating an installation manner of an interface device box according to an embodiment of the present invention;
fig. 6 is a block diagram of another specific example of the interface device according to the embodiment of the present invention;
fig. 7 is a flowchart of a specific example of a communication method according to an embodiment of the present invention;
fig. 8 is a flowchart of another specific example of a communication method according to an embodiment of the present invention;
fig. 9 is a flowchart of another specific example of the communication method according to the embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment of the invention provides an interface device of a converter valve and valve base control equipment, which is applied to occasions needing to control a plurality of pieces of equipment. In an embodiment, as shown in fig. 1, the converter valve is composed of 6 bridge arms, each bridge arm is composed of k sub-modules, the valve base control device is composed of 6 bridge arm control units, the first bridge arm control unit controls the first bridge arm sub-module through the a 1-an interface devices, and the sixth bridge arm controls the sixth bridge arm sub-module through the dn interface device.
In the embodiment of the present invention, as shown in fig. 2, when one bridge arm control unit controls the operating state of the sub-modules of the same bridge arm through at least one interface device, the interface device includes: the device comprises a control module 1, a power supply interface module 2, at least one first communication module 3 and a plurality of second communication modules 4.
As shown in fig. 2, the first communication module 3 according to the embodiment of the present invention is respectively connected to the bridge arm control unit and the control module 1, and is configured to receive a sub-module control information data packet sent by the bridge arm control unit.
The interface device of the embodiment of the invention is connected with a bridge arm control unit of a VBC (visual basic control unit) through a first communication module 3 via a long-distance optical fiber, the bridge arm control unit combines sub-module control information connected with the interface device to obtain a sub-module control information data packet corresponding to the interface device, and the sub-module control information data packet is sent to a control module 1 in the interface device via the first communication module 3, wherein the first communication module 3 can be a first optical communication module.
As shown in fig. 2, the second communication modules 4 in the embodiment of the present invention correspond to the sub-modules one to one, and are respectively connected to the control module 1 and the corresponding sub-modules, and are configured to receive the operation status information sent by the corresponding sub-modules.
The interface device comprises a plurality of second communication modules 4, each second communication module 4 is connected with one submodule and the control module 1, so that the number of the interface devices needed by the bridge arm control unit is determined by the number of the submodules on the bridge arm and the number of the second communication modules 4 in the interface devices. The control module 1 is connected with the sub-modules through the second communication module 4 via short-distance optical fibers, the control module 1 analyzes the sub-module control information data packet sent by the bridge arm control unit, and then sends the sub-module control information to the corresponding sub-modules through the second communication module 4, wherein the first communication module 3 can be a first optical communication module.
As shown in fig. 2, a control module 1 according to the embodiment of the present invention is connected to a first communication module 3 and a second communication module 4, respectively, and is configured to analyze a sub-module control information data packet to obtain sub-module control information, and send the sub-module control information to a corresponding sub-module through the second communication module 4; and combining the running state information sent by the corresponding sub-modules, and sending the obtained corresponding sub-module running state information data packet to the corresponding bridge arm control unit through the first communication module 3.
In the embodiment of the invention, each submodule and the bridge arm control unit are in bidirectional communication, the bridge arm control unit can not only send a submodule control information data packet to the control module 1 through the first communication module 3, the control module 1 analyzes the submodule control information data packet to obtain control information of each connected submodule and sends the control information to the corresponding submodule through the second communication module 4, but also each submodule sends the running state information of the submodule to the corresponding control module 1 through the second communication module 4, the control module 1 collects and combines the running state information of the connected submodules to obtain a submodule running state information data packet, and sends the submodule running state information data packet to the corresponding bridge arm control unit through the first communication module 3.
It should be noted that the control module 1 of the embodiment of the present invention includes a Central Processing Unit (CPU) and an FPGA chip; in order to further improve the anti-electromagnetic interference capability of the equipment and reduce the equipment cost, the control module 1 does not need to be provided with a CPU chip, and only realizes the control function through an FPGA chip, and in addition, the control module 1 can also be other data processing chips.
As shown in fig. 2, the power supply interface module 2 according to the embodiment of the present invention is respectively connected to an external power supply, a first communication module 3, a second communication module 4, and a control module 1, and is configured to supply power to the first communication module 3, the second communication module 4, and the control module 1.
The power supply interface module 2 of the embodiment of the invention is powered by an external power supply, and the selection of the external power supply is determined by the installation position of the interface device.
According to the interface device of the converter valve and the valve base control equipment, provided by the embodiment of the invention, the data information of the bridge arm control unit and the data information of the sub-modules are interacted sequentially through the first communication module, the control module and the second communication module, so that a large amount of optical fiber routing from a secondary control room to a valve hall is saved, the workload of laying optical fibers is reduced, the possibility of breakage of middle optical fibers is greatly reduced, later-period maintenance is facilitated, and the reliability of communication between the valve base control equipment and the valve tower sub-modules is effectively improved.
In a specific embodiment, as shown in fig. 3, when one bridge arm control unit controls the operating states of the sub-modules of the same bridge arm through a plurality of interface devices, and any one of the plurality of interface devices is a main interface device, the interface device further includes: at least one third communication module 5, interconnected with each other with the third communication module 5 of the lower level interface device, for communicating with the upper level interface device and the lower level interface device.
In the embodiment of the invention, when the interface devices are arranged at the bottom of the valve tower or other positions of the valve hall, and one bridge arm control unit controls the running state of the sub-modules of the same bridge arm through a plurality of interface devices, all the interface devices can be placed in one interface equipment box, in order to further reduce the using number of long-distance optical fibers connected between the interface devices and the bridge arm control unit of the VBC, one interface device can be selected in the interface equipment box as a main interface device, and all the interface devices in the interface box are mutually connected in pairs through the short-distance optical fibers through a third communication module 5 to carry out information interaction; the interface equipment box only needs to use a pair of long-distance optical fibers to be connected with a VBC bridge arm control unit in a secondary control chamber, and the other end of each long-distance optical fiber is connected to a main interface device in the interface equipment box.
Specifically, as shown in fig. 3, it is assumed that the bridge arm control unit controls the state of the sub-module and receives the state information of the sub-module through a first interface device, a second interface device and a third interface device, the first interface device is a main interface device, the first interface device is correspondingly connected with a third communication module 5 of the second interface device through a third communication module 5 inside the first interface device, the second interface device is correspondingly connected with a third communication module 5 of the third interface through a third communication module 5 inside the second interface device, the second interface device is a lower interface device of the first interface device, and the third interface device is a lower interface device of the second interface device (the upper and lower interface devices are not in a master-slave relationship, but only in a connection relationship after being connected in series). The bridge arm control unit respectively combines the control information of the submodules connected with the first interface device, the second interface device and the third interface device to obtain a first submodule control information data packet, a second submodule control information data packet and a third submodule control information data packet, the bridge arm control unit sends the three submodule control information data packets to a control module 1 of the first interface device through a first communication module 3 of the first interface device, after the control module 1 of the first interface device identifies the three submodule control information data packets, the second submodule control information data packet and the third submodule control information data packet are sent to a control module 1 of the second interface device through a third communication module 5 and a third communication module 5 inside the bridge arm control unit, after the control module 1 of the second interface device identifies the two submodule control information data packets, and sending the third sub-module control information data packet to a control module 1 of a third interface control device through a third communication module 5 in the third sub-module control information data packet and a third communication module 5 of a third interface device, analyzing the respective sub-module control information data packet by the three interface devices to obtain sub-module control information, and sending the control information to the corresponding sub-module.
Similarly, the first interface device, the second interface device, and the third interface device respectively receive the corresponding sub-module operating state information through the respective second communication module 4, and combine the sub-module operating state information to obtain the respective sub-module operating state information data packets (i.e. the first sub-module state information data packet, the second sub-module state information data packet, and the third sub-module state information data packet), the third interface device sends the third sub-module state information data packet to the control module 1 of the second interface device through the third communication module 5 inside the third interface device and the third communication module 5 of the second interface device, the control module 1 of the second interface device sends the second sub-module state information data packet, the third sub-module state information data packet to the control module 1 of the first interface device through the third communication module 5 inside the third interface device and the third communication module 5 of the first interface device, the control module 1 of the first interface device sends a first sub-module state information data packet, a second sub-module state information data packet and a third sub-module state information data packet to the bridge arm control unit through a first communication module 3 in the control module.
It should be noted that the third communication module 5 of the embodiment of the present invention is an optical communication module, and it is a detachable module.
In a specific embodiment, in the embodiment of the present invention, when the interface device includes at least two first communication modules 3, all the first communication modules 3 are mutually standby communication modules. All the first communication modules 3 in the same interface device receive and send the same data, which are mutually standby, when the first communication module 3 has a fault, other normal first communication modules 3 can continue to work under the condition that the converter valve is not stopped. Similarly, when the interface device includes at least two third communication modules 5, all the third communication modules 5 in the same interface device are standby communication modules each other.
It should be noted that the first communication module 3 in the embodiment of the present invention adopts a high-speed optical fiber communication module, and the communication mode thereof is RapidIO; the second communication module 4 adopts a low-speed optical communication transceiver, and the communication speed range is 2Mbps-50 Mbps; the third communication module 5 is a low-speed optical communication transceiver with a communication rate ranging from 2Mbps to 50Mbps, and is a detachable module, which is only used for example and is not limited thereto.
In one embodiment, the interface device is disposed in a shielded enclosure housing for resisting strong electromagnetic interference; when one bridge arm control unit controls the running state of the sub-modules of the same bridge arm through a plurality of interface devices, the plurality of interface devices are arranged at different installation places, or the plurality of interface devices are arranged in the same interface equipment box.
The interface device in the embodiment of the invention is arranged in the shielding case shell, and the shell has the insulating and strong electromagnetic shielding capabilities and can prevent the interface device from being interfered by a high-voltage strong electromagnetic environment of a converter valve hall during the operation. When the number of the sub-modules of the same bridge arm is larger than the number of the second communication modules 4 of the interface devices, the bridge arm control unit of the bridge arm controls the sub-modules through the plurality of interface devices, all the interface devices can be installed in different places, or can be connected in parallel and then placed in the same interface equipment box, and the installation places of the interface equipment boxes are selected according to actual conditions.
In a specific embodiment, when one bridge arm control unit controls the operating state of the sub-modules of the same bridge arm through a plurality of interface devices, the power supply interface modules 2 of the plurality of interface devices are powered by different external power supplies, or the plurality of power supply interface modules 2 are powered by the same external power supply after being combined in parallel.
When the number of the sub-modules of the same bridge arm is larger than the number of the second communication modules 4 of the interface devices, the bridge arm control unit of the bridge arm controls the sub-modules through the plurality of interface devices, all the interface devices can be installed in different places, and the power supply interface modules 2 of all the interface devices are powered by different external power supplies; when all the interface devices are arranged in the same interface equipment box, the power supply interface modules 2 of all the interface devices are connected in parallel and then are powered by the same external power supply.
In a specific embodiment, when the interface device is installed in the insulation shielding case of each valve layer of the converter valve tower, the power supply interface module 2 obtains energy from the energy obtaining power supply of at least one corresponding sub-module; when the interface device is installed at the bottom of the converter valve tower or at other positions of the converter valve tower, the power supply interface module 2 obtains energy from the power supply of the converter valve hall.
The interface device of the embodiment of the invention can be arranged in the insulating shielding cover of each valve layer of the converter valve tower, and the power supply mode is that the energy-taking power output of the sub-module is connected to the power supply interface module 2 of the interface device for supplying energy; preferably, a plurality of sub-module energy-taking power outputs can be selected to be connected in parallel to the power supply interface module 2 of the interface device, so that the power supply of the interface device is prevented from being influenced after the fault of a single sub-module is bypassed; the number M of the interface devices installed on each valve layer is equal to the number S1 of the sub-modules of the valve layer and the number N of the second-type optical communication modules of the interface devices.
Specifically, as shown in fig. 4, in order to shorten the length of the communication optical fiber between the sub-modules and the interface device to the maximum, considering the convenience of optical fiber arrangement and the control reliability, one interface device may be installed on each layer of the converter valve tower, and the interface device is responsible for the interaction of control and status information with all the sub-modules of the valve layer via the short optical fiber. Under the configuration mode, the interface device needs to be supplied with power through the energy-taking power supply of the sub-modules, in order to prevent the situation that the interface device cannot be supplied with power after a single sub-module fails, a mode that a plurality of sub-module energy-taking power supplies are connected with the same interface device in parallel can be adopted, and when a certain sub-module bypasses, the other sub-modules can still provide power for the energy-taking device.
The interface device of the embodiment of the invention is also arranged at the bottom of the converter valve tower, and is connected to a power supply interface module 2 of the interface device for supplying power through the power supply output of the converter valve hall; the number M of the interface devices installed on each valve tower is equal to the number S2 of the sub-modules of the valve tower divided by the number N of the second-type optical communication modules of the interface devices.
The interface device provided by the embodiment of the invention can be uniformly placed at other positions of the valve hall according to the layout requirements of the valve hall in the actual engineering field, and the power supply output of the converter valve hall is connected to the power supply interface module 2 of the interface device for supplying power. Preferably, when the interface device is installed at the bottom of the valve tower or other positions of the valve hall, in order to improve the energy supply reliability of the interface device, a plurality of interface devices can be combined for use, that is, a plurality of interface devices can be combined into one interface equipment box, and the interface device power supply interface modules 2 in the interface equipment box are connected in parallel.
Specifically, as shown in fig. 5, in order to further reduce the complexity of the installation and construction of the interface devices, a plurality of interface devices in charge of connecting all the sub-modules in a single valve tower can be uniformly placed in the same interface device box, and the interface device box is installed at the bottom of the valve tower. The mode can also greatly reduce long-distance optical fiber wiring, and the mode of supplying power by an external power supply is adopted, so that the reliability is higher, and the electromagnetic interference design of the interface device is more facilitated. And meanwhile, all the interface devices are combined and placed below the valve tower, so that later-period maintenance is more convenient.
As shown in fig. 6, in view of further reducing the usage of long-distance optical fibers for communication between the interface devices and the VBC bridge arm control unit, when the bridge arm control unit requires a plurality of interface devices, all the interface devices are placed in the same interface equipment box, and one master interface device is selected, which communicates with the VBC bridge arm control unit through a pair of long-distance optical fibers, and the remaining interface devices are no longer in optical fiber connection with the VBC. The interface device in the interface equipment box realizes information interaction between the interface devices by controlling the extended communication interface module (the third communication module 5) on the core board. After receiving the sub-module control instruction issued by the VBC, the main interface device parses the sub-module control instruction, issues the sub-module control instruction to other interface devices connected to the main interface device through an extended communication interface (a third communication module 5), and transmits the sub-module control instruction to the other interface devices in the interface equipment box through the other interface devices; similarly, after the state information uploaded by the sub-modules is transmitted to each interface device, the information is collected uniformly by the main interface device and then sent to the VBC bridge arm control unit.
According to the interface device of the converter valve and the valve base control equipment, the data information of the bridge arm control unit and the data information of the sub-modules are interacted sequentially through the first communication module, the control module and the second communication module, so that a large number of optical fiber routing from a secondary control room to a valve hall is omitted, the workload of laying optical fibers is reduced, the possibility of breakage of middle optical fibers is greatly reduced, later-period maintenance is facilitated, and the reliability of communication between the valve base control equipment and the valve tower sub-modules is effectively improved.
According to the interface device for the converter valve and the valve base control equipment, when a bridge arm control unit needs to be configured with a plurality of interface devices, one interface device is selected as a main interface device, the third communication module of each interface device is utilized to realize the connection of every two interface devices, and after receiving all sub-module control information data packets sent by the bridge arm control unit, the main interface device analyzes the sub-module control information data packets, sends the sub-module control information data packets to other interface devices connected with the main interface device through an extended communication interface, and then transmits the sub-module control information data packets to the other interface devices in an interface equipment box through the other interface devices; similarly, after the state information uploaded by the sub-modules is transmitted to each interface device, the main interface device unifies and summarizes the information and then sends the information to the bridge arm control unit, so that the information interaction of each interface device is realized, and the use amount of the long-distance optical fiber communicated between the interface device and the bridge arm control unit is further reduced.
According to the interface device of the converter valve and the valve base control equipment, the second communication modules correspond to the sub-modules one by one, each sub-module is connected with the interface device through the independent optical fiber, and a point-to-point parallel communication mode is adopted between each sub-module and the valve base control equipment, so that the state information loss of a certain sub-module is avoided, and the response speed of each sub-module in executing a switching command can be greatly improved.
According to the interface device of the converter valve and the valve base control equipment, the interface device is arranged on the valve tower or arranged under the valve tower after being combined, so that interface cabinets required by six bridge arms in a secondary control chamber are saved, and the occupied space and the equipment cost of the valve control equipment in the secondary control chamber are greatly saved.
According to the interface device of the converter valve and the valve base control equipment, the interface device works independently and dispersedly on the valve tower or the combined interface device is placed below the valve tower for uniform power supply, and the external power supply is used for uniformly supplying power to the interface device, so that the number of optical fibers between the valve base control equipment and the valve tower is effectively reduced, and the cost can be obviously reduced.
Example 2
The embodiment of the invention provides a communication method for a converter valve and valve base control equipment, based on the interface device of embodiment 1, when one bridge arm control unit controls the operation state of a submodule of the same bridge arm through at least one interface device, as shown in fig. 7, the communication method comprises the following steps:
step S11: the bridge arm control unit combines the acquired sub-module control information to obtain at least one sub-module control information data packet, and the bridge arm control unit sends the corresponding sub-module control information data packet to the corresponding first communication module.
Step S12: the first communication module sends the sub-module control information data packet to the control module, and the control module sends the sub-module control information to the corresponding sub-module through the second communication module after analyzing the sub-module control information data packet.
Step S13: the control module receives the running state information sent by the sub-modules, combines the running state information sent by the sub-modules, and sends the obtained sub-module running state information data packet to the corresponding bridge arm control unit through the first communication module.
The bridge arm control unit in the embodiment of the invention controls the operation state of the same bridge arm submodule through at least one interface device (the number of the interface devices is determined by the number of the same bridge arm submodule and the number of the second communication modules), when all the interface devices operate independently, the bridge arm control unit sends a submodule control information data packet to a control module of a corresponding interface device through a first communication module of each interface device, and after the control module analyzes the submodule control information data packet, the control information of each submodule is obtained, and the control information is sent to the corresponding submodule through the second communication module.
In the embodiment of the invention, each submodule sends the respective running state information to the control module of the corresponding interface device through the second communication module, the control module collects and combines the running state information of each submodule to obtain a submodule running state information data packet, and the submodule running state information data packet is sent to the corresponding bridge arm control unit through the first communication module.
In a specific embodiment, as shown in fig. 8, when one bridge arm control unit controls the operating states of the sub-modules of the same bridge arm through a plurality of interface devices, and any one of the plurality of interface devices is a main interface device, the communication method further includes:
step S21: and the bridge arm control unit combines the control information of the submodules connected with the interface devices to obtain a plurality of submodule control information data packets.
Step S22: and the bridge arm control unit sends all the sub-module control information data packets to the control module of the main interface device through the first communication module of the main interface device.
Step S23: the control module of the main interface device identifies the sub-module control information data packet of the interface device at the current stage, and sends the sub-module control information data packets of other interface devices to the control module of the interface device at the next stage sequentially through the third communication module of the current stage and the third communication module of the interface device at the next stage.
Step S24: the control module of the interface device at the next level identifies the sub-module control information data packet of the interface device at the current level, and sends the sub-module control information data packets of other interface devices to the control module of the interface device at the next level sequentially through the third communication module of the interface device at the current level and the third communication module of the interface device at the next level, and so on until the control modules of the interface devices at all levels identify the sub-module control information data packet at the current level.
In the embodiment of the invention, when the interface devices are arranged at the bottom of the valve tower or other positions of the valve hall, and one bridge arm control unit controls the running state of the sub-modules of the same bridge arm through a plurality of interface devices, all the interface devices can be placed in one interface equipment box, in order to further reduce the using number of long-distance optical fibers connected between the interface devices and the bridge arm control unit of the VBC, one interface device can be selected in the interface equipment box as a main interface device, and all the interface devices in the interface box are mutually connected in pairs through the short-distance optical fibers through a third communication module to carry out information interaction; the interface equipment box only needs to use a pair of long-distance optical fibers to be connected with a VBC bridge arm control unit in a secondary control chamber, and the other end of each long-distance optical fiber is connected to a main interface device in the interface equipment box.
Specifically, as shown in fig. 3, it is assumed that the bridge arm control unit controls the state of the sub-module and receives the state information of the sub-module through a first interface device, a second interface device, and a third interface device, where the first interface device is a main interface device, the first interface device is correspondingly connected with a third communication module of the second interface device through a third communication module inside the first interface device, the second interface device is correspondingly connected with a third communication module of the third interface through a third communication interface inside the second interface device, the second interface device is a lower-level interface device of the first interface device, and the third interface device is a lower-level interface device of the second interface device (where the upper-level and lower-level interface devices are not in a master-slave relationship, but only in a connection relationship after being connected in series). The bridge arm control unit respectively combines the control information of the submodules connected with the first interface device, the second interface device and the third interface device to obtain a first submodule control information data packet, a second submodule control information data packet and a third submodule control information data packet, the bridge arm control unit sends the three submodule control information data packets to the control module of the first interface control device through the first communication module of the first interface device, after the control module of the first interface control device identifies the three submodule control information data packets, the second submodule control information data packet and the third submodule control information data packet are sent to the control module of the second interface control device through the third communication module and the third communication module of the second interface device, after the control module of the second interface control device identifies the two submodule control information data packets, and the three interface devices analyze the respective sub-module control information data packets to obtain sub-module control information and send the control information to the corresponding sub-modules.
In a specific embodiment, the method for communicating the converter valve with the valve base control device further comprises:
after the control module of the interface device at each level identifies the sub-module control information data packet at the level, each control module analyzes the sub-module control information data packet at the level to obtain the sub-module control information at the level, and sends the control information to the corresponding sub-module through the second communication module at the level.
In a specific embodiment, as shown in fig. 9, the method for communicating the converter valve with the valve base control device further includes:
step S31: and the control module of each level of interface device receives the running state information sent by the corresponding sub-module through the second communication module, and combines the running state information of the plurality of sub-modules to obtain the running state information data packet of the sub-module at the current level.
Step S32: and the control module of the last-stage interface device sends the sub-module operation state information data packet of the current stage to the control module of the last-stage interface device through the third communication module of the current stage and the third communication module of the last-stage interface device in sequence.
Step S33: the control module of the upper level interface device sends the sub-module state information data packet of the level and the data packet sent by the lower level to the control module of the next upper level interface device sequentially through the third communication module of the level and the third communication module of the next upper level interface device, and so on until the control module of the main interface device receives the sub-module state information data packets sent by all other interface devices.
Step S34: and the control module of the main interface device sends the sub-module running state information data packet of the current level and the sub-module state information data packets sent by all other interface devices to the bridge arm control unit through the first communication module of the current level.
Specifically, as shown in fig. 3, it is assumed that the bridge arm control unit controls the state of the sub-module and receives the state information of the sub-module through a first interface device, a second interface device, and a third interface device, where the first interface device is a main interface device, the first interface device is correspondingly connected with a third communication module of the second interface device through a third communication module inside the first interface device, the second interface device is correspondingly connected with a third communication module of the third interface through a third communication interface inside the second interface device, the second interface device is a lower-level interface device of the first interface device, and the third interface device is a lower-level interface device of the second interface device (where the upper-level and lower-level interface devices are not in a master-slave relationship, but only in a connection relationship after being connected in series). The first interface device, the second interface device and the third interface device respectively receive corresponding operation state information of a plurality of sub-modules through respective second communication modules and combine the operation state information of the plurality of sub-modules to obtain respective sub-module operation state information data packets (respectively a first sub-module state information data packet, a second sub-module state information data packet and a third sub-module state information data packet), the third interface device sends the third sub-module state information data packet to a control module of the second interface device through a third communication module in the third interface device and a third communication module of the second interface device, the control module of the second interface device sends the second sub-module state information data packet and the third sub-module state information data packet to a control module of the first interface device through a third communication module in the third interface device and the third communication module of the first interface device, and the control module of the first interface device sends the first sub-module state information data packet, the second sub-module state information data packet and the third sub-module state information data packet to the bridge arm control unit through the first communication module in the control module.
According to the communication method of the converter valve and the valve base control equipment, provided by the embodiment of the invention, the data information of the bridge arm control unit and the sub-module is interacted sequentially through the first communication module, the control module and the second communication module, so that a large amount of optical fiber routing from a secondary control room to a valve hall is saved, the workload of laying optical fibers is reduced, meanwhile, the possibility of breakage of middle optical fibers is greatly reduced, later-period maintenance is facilitated, and the reliability of communication between the valve base control equipment and the valve tower sub-module is effectively improved.
According to the communication method of the converter valve and the valve base control equipment, when a bridge arm control unit needs to be configured with a plurality of interface devices, one interface device is selected as a main interface device, the third communication module of each interface device is utilized to realize the connection of every two interface devices, and after receiving all sub-module control information data packets sent by the bridge arm control unit, the main interface device analyzes the sub-module control information data packets, sends the sub-module control information data packets to other interface devices connected with the main interface device through an extended communication interface, and then transmits the sub-module control information data packets to the other interface devices in an interface equipment box through the other interface devices; similarly, after the state information uploaded by the sub-modules is transmitted to each interface device, the main interface device unifies and summarizes the information and then sends the information to the bridge arm control unit, so that the information interaction of each interface device is realized, and the use amount of the long-distance optical fiber communicated between the interface device and the bridge arm control unit is further reduced.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. An interface device for a converter valve and a valve base control device is characterized in that the valve base control device comprises a plurality of bridge arm control units, the converter valve comprises a plurality of bridge arms, each bridge arm comprises a plurality of sub-modules, and when one bridge arm control unit controls the operation state of the sub-modules of the same bridge arm through at least one interface device, the interface device comprises: a control module, a power supply interface module, at least one first communication module and a plurality of second communication modules, wherein,
the first communication module is respectively connected with the bridge arm control unit and the control module and is used for receiving the sub-module control information data packet sent by the bridge arm control unit;
the second communication modules correspond to the sub-modules one by one, are respectively connected with the control modules and the corresponding sub-modules, and are used for receiving the running state information sent by the corresponding sub-modules;
the control module is used for analyzing the sub-module control information data packet to obtain sub-module control information and sending the sub-module control information to the corresponding sub-module through the second communication module; combining the running state information sent by the corresponding sub-modules, and sending the obtained corresponding sub-module running state information data packet to the corresponding bridge arm control unit through the first communication module;
and the power supply interface module is respectively connected with an external power supply, the first communication module, the second communication module and the control module and is used for supplying power to the first communication module, the second communication module and the control module.
2. The converter valve and valve base control apparatus interface device according to claim 1, wherein when one bridge arm control unit controls the operation state of the sub-modules of the same bridge arm through a plurality of interface devices, and any one of the plurality of interface devices is a main interface device, the interface device further comprises:
at least one third communication module, which is connected with the third communication module of the lower interface device in pairs, and is used for communicating with the upper interface device and the lower interface device.
3. The converter valve and valve base control apparatus interface device of claim 1, wherein when said interface device comprises at least two first communication modules, all of said first communication modules are backup communication modules for each other.
4. The converter valve and valve base control apparatus interface of claim 1,
the interface device is arranged in a shielding case shell, and the shielding case shell is used for resisting strong electromagnetic interference;
when one bridge arm control unit controls the running state of the sub-modules of the same bridge arm through a plurality of interface devices, the plurality of interface devices are arranged at different installation places, or the plurality of interface devices are arranged in the same interface equipment box.
5. The interface device for the converter valve and the valve base control equipment according to claim 1, wherein when one bridge arm control unit controls the operation state of the sub-modules of the same bridge arm through a plurality of interface devices, the power supply interface modules of the plurality of interface devices are powered by different external power supplies, or the plurality of power supply interface modules are powered by the same external power supply after being combined in parallel.
6. The converter valve and valve base control apparatus interface of claim 1,
when the interface equipment is installed in the insulation shielding cover of each valve layer of the converter valve tower, the power supply interface module obtains energy from the energy obtaining power supply of at least one corresponding sub-module;
when the interface equipment is arranged at the bottom of the converter valve tower or other positions of the converter valve tower, the power supply interface module obtains energy from the power supply of the converter valve hall.
7. A communication method of a converter valve and a valve base control device, based on an interface device according to any one of claims 1 to 6, when one bridge arm control unit controls the operation state of the sub-modules of the same bridge arm through at least one interface device, the communication method comprising:
the bridge arm control unit combines the acquired sub-module control information to obtain at least one sub-module control information data packet, and sends the corresponding sub-module control information data packet to the corresponding first communication module;
the first communication module sends the sub-module control information data packet to the control module, and the control module sends the sub-module control information to the corresponding sub-module through the second communication module after analyzing the sub-module control information data packet;
the control module receives the running state information sent by the sub-modules, combines the running state information sent by the sub-modules, and sends the obtained sub-module running state information data packet to the corresponding bridge arm control unit through the first communication module.
8. The method for communicating the converter valve with the valve base control device according to claim 7, wherein when one bridge arm control unit controls the operation state of the sub-modules of the same bridge arm through a plurality of interface devices, and any one of the plurality of interface devices is a main interface device, the method further comprises:
the bridge arm control unit combines the control information of the sub-modules connected with each interface device to obtain a plurality of sub-module control information data packets;
the bridge arm control unit sends all sub-module control information data packets to a control module of the main interface device through a first communication module of the main interface device;
the control module of the main interface device identifies the sub-module control information data packet of the interface device at the current level, and sends the sub-module control information data packets of other interface devices to the control module of the interface device at the next level sequentially through the third communication module of the current level and the third communication module of the interface device at the next level;
the control module of the interface device at the next level identifies the sub-module control information data packet of the interface device at the current level, and sends the sub-module control information data packets of other interface devices to the control module of the interface device at the next level sequentially through the third communication module of the interface device at the current level and the third communication module of the interface device at the next level, and so on until the control modules of the interface devices at all levels identify the sub-module control information data packet at the current level.
9. The method of communicating a converter valve with a valve base control apparatus of claim 8, further comprising:
after the control module of the interface device at each level identifies the sub-module control information data packet at the level, each control module analyzes the sub-module control information data packet at the level to obtain the sub-module control information at the level, and sends the control information to the corresponding sub-module through the second communication module at the level.
10. The method of communicating a converter valve with a valve base control apparatus of claim 9, further comprising:
the control module of each level of interface device receives the running state information sent by the corresponding sub-module through the second communication module, and combines the running state information of the plurality of sub-modules to obtain a sub-module running state information data packet of the level;
the control module of the last level interface device sends the sub-module operation state information data packet of the level to the control module of the upper level interface device through the third communication module of the level and the third communication module of the upper level interface device in sequence;
the control module of the upper-level interface device sends the sub-module state information data packet of the level and the data packet sent by the lower level to the control module of the next upper-level interface device sequentially through the third communication module of the level and the third communication module of the next upper-level interface device, and so on until the control module of the main interface device receives the sub-module state information data packets sent by all other interface devices;
and the control module of the main interface device sends the sub-module running state information data packet of the current level and the sub-module state information data packets sent by all other interface devices to the bridge arm control unit through the first communication module of the current level.
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