CN113885307A - SVG parallel machine redundancy control method, SVG control method and SVG control system - Google Patents
SVG parallel machine redundancy control method, SVG control method and SVG control system Download PDFInfo
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Abstract
A SVG parallel machine redundancy control method, a SVG control method and a control system are provided, wherein the SVG parallel machine redundancy control method comprises the following steps: the method comprises the steps that state information is mutually transmitted between a host and a plurality of slaves, the state information comprises an ID value and operation information, and the operation information comprises an enabled state and an disabled state; and if the master machine fails, reselecting the master machine from a plurality of slave machines which do not fail according to the ID value corresponding to each slave machine. The invention provides a foundation for reselecting one slave machine as the master machine by using the ID value when the subsequent master machine fails by distributing the ID value to each SVG. Through the state information transmission between the host and the plurality of slave machines, the ID value can be compared and the host can be selected after the subsequent host fails. And a new host is reselected after the host fails, so that the problem that the idle work cannot be distributed in a parallel operation network formed by the host and the plurality of slave machines is solved, and the operation stability can be effectively improved.
Description
Technical Field
The invention belongs to the field of information transmission, and particularly relates to a SVG parallel machine redundancy control method, a SVG control method and a SVG control system.
Background
With the development of power electronic technology and the different expansion of offshore power transmission scale, static synchronous compensators (SVG) are also developed rapidly. The SVG has the characteristics of high response speed, large compensation capacity and small occupied area, and is widely applied to the fields of offshore wind power generation and photovoltaic power generation. The operation condition of SVG is more, especially when carrying out multimachine parallel operation, how to carry out reactive power calculation and distribution then is a big problem, and traditional control mode selects a SVG as host computer SVG, realizes reactive power calculation and distribution through host computer SVG and AVC, but, in case host computer SVG breaks down, then can lead to the parallel operation network that a plurality of SVGs constitute to break down, and the integral stability of the parallel operation network that a plurality of SVGs constitute is relatively poor promptly.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an SVG parallel machine redundancy control method, which solves the problem of poor stability of SVG multi-machine parallel machine. The present invention also proposes an SVG control method, an SVG and a computer-readable storage medium for executing the SVG control method.
According to the SVG parallel machine redundancy control method of the embodiment of the first aspect of the present invention, the method comprises the following steps:
the method comprises the steps that state information is mutually transmitted between a master machine and a plurality of slave machines, the state information comprises an ID value and operation information, and the operation information comprises an enabled state and a non-enabled state; if the master machine does not have a fault, the operation information of the master machine is in an enabled state, and the operation information of the plurality of slave machines is in an disabled state;
if the master computer fails, reselecting the master computer from a plurality of slave computers which do not fail according to the ID value corresponding to each slave computer; the master and the plurality of slaves correspond to different ID values, and the size of the ID values is related to the priority level selected as the master; and setting the operation information of the reselected master machine to be in an enabled state, and setting the operation information of the unselected slave machines to be in a non-enabled state.
The SVG parallel machine redundancy control method provided by the embodiment of the invention at least has the following technical effects: the ID value is related to the priority level of the selected host, and the ID value is distributed to each SVG, so that a selection basis is provided for reselecting a slave with higher priority level as the host when the subsequent host fails. Through the transmission of the state information between the host and the plurality of the slave machines, the data interaction between the host and the plurality of the slave machines can be realized, so that a foundation is provided for the ID value comparison after the subsequent host faults. And a new host is reselected after the host fails, so that the problem that the idle work cannot be distributed in a parallel operation network formed by the host and the plurality of slave machines is solved, and the operation stability can be effectively improved. Compared with the traditional mode, the SVG parallel machine redundancy control method provided by the embodiment of the invention has the advantages that the redundancy mechanism between the host and the plurality of slave machines is constructed, so that the host can be selected from the slave machines again when the host has a problem, and the stability of working conditions during grid connection is greatly improved.
According to some embodiments of the invention, the ID value of the master and the ID values of the plurality of slaves are obtained by:
performing local area network networking on the host and the plurality of slaves, and allocating different IPs of the same network segment to the host and the plurality of slaves, wherein the lowest IP value of the IPs is the ID value; and the IP distribution of the host and the plurality of the slaves is completed according to a single machine debugging result, and the size of the ID value corresponding to the plurality of the IPs is negatively related to the priority level selected as the host.
According to some embodiments of the present invention, said reselecting a master from a plurality of said slaves that have not failed according to said ID value corresponding to each of said slaves comprises:
setting the operation information of the host machine to be in an disabled state, enabling the host machine to be separated from a grid-connected state, and simultaneously cutting off the communication between the host machine and AVC and the communication between the host machine and a plurality of slave machines;
if the slave machines do not receive the state information sent by the host machine within the preset fault judgment time, setting the operation information of the slave machines to be in an enabling state;
and mutually transmitting the state information among the plurality of slave machines, selecting the slave machine with the smallest ID value, taking the selected slave machine as a new master machine, and resetting the operation information of the unselected slave machines to be in an disabled state.
According to some embodiments of the present invention, the failure determination time is 10ms, and the communication cycle between the master and the plurality of slaves is 1 ms.
According to some embodiments of the invention, the master and the plurality of slaves are interconnected by LC multimode fiber or single mode fiber interleaving.
According to some embodiments of the present invention, the optical fiber communication board of the master and the optical fiber communication boards of the slaves both use 3 SFP optical fiber ports.
The SVG control method according to the embodiment of the second aspect of the present invention is applied to a local SVG which is any slave, and comprises the steps of:
receiving state information transmitted by a master and a plurality of slaves, wherein the state information comprises an ID value and operation information, and the operation information comprises an enabled state and an disabled state; if the master machine does not have a fault, the operation information of the master machine is in an enabled state, and the operation information of the plurality of slave machines is in an disabled state;
if the state information transmitted by the host cannot be received, comparing the ID value of the local SVG with the ID values transmitted by the plurality of slave machines, and determining whether the local SVG is selected as a new host according to the comparison result; the size of the ID value is related to the priority level selected as the host; if the local SVG is selected as a new host, the running information of the local SVG is set to be in an enabling state, and if the local SVG is not selected as a host, the running information of the local SVG is set to be in an disabling state.
The SVG control method according to the embodiment of the present invention has at least the following technical effects: by receiving the state information sent by the host and other slave machines, whether the host fails or not can be determined conveniently, meanwhile, after the host fails, the host can be compared with the ID values of other slave machines one by one, and whether the local SVG can be selected as a new host or not is finally determined. The SVG control method provided by the embodiment of the invention has the capability of rapidly determining whether the local SVG is selected as a new host when the host fails, and greatly improves the stability of the whole parallel operation network after the host fails.
According to some embodiments of the present invention, the basis for selecting the local SVG as the new host is: the ID value of the local SVG is smaller than the received ID values transmitted from the plurality of slaves.
An SVG control system according to an embodiment of the third aspect of the invention includes:
the information transceiver module is used for receiving state information transmitted by a master machine and a plurality of slave machines, wherein the state information comprises an ID value and operation information, and the operation information comprises an enabled state and an disabled state; if the master machine does not have a fault, the operation information of the master machine is in an enabled state, and the operation information of the plurality of slave machines is in an disabled state;
the state setting unit is used for comparing the ID value of the local SVG with the ID values transmitted by the plurality of slave machines when the state information transmitted by the host machine cannot be received, and determining whether the local SVG is selected as a new host machine according to the comparison result; the size of the ID value is related to the priority level selected as the host; wherein, if local SVG is selected to be the host computer, local SVG's operation information sets up to enable the state, if not selected to be the host computer, local SVG's operation information sets up to not enable the state.
The SVG control system according to the embodiment of the present invention has at least the following beneficial effects: the information receiving and sending module receives the state information sent by the host and other slave machines, so that the state setting unit can conveniently determine whether the host fails or not subsequently, and meanwhile, after the host fails, the state setting unit can compare the ID values of the local SVG with the ID values of other slave machines one by one, and finally determine whether the local SVG can be selected as a new host or not. The SVG control system provided by the embodiment of the invention has the capability of rapidly determining whether the local SVG is selected as a new host when the host fails, thereby greatly improving the stability of the whole parallel operation network after the host fails.
According to a fourth aspect of the invention, there is provided a computer-readable storage medium storing computer-executable instructions for causing a computer to execute the SVG control method described above.
The computer-readable storage medium according to the embodiment of the invention has at least the following advantages: storage and transfer of computer-executable instructions may be facilitated by a storage medium.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a multi-machine parallel network implementing the SVG parallel machine redundancy control method of an embodiment of the present invention;
FIG. 2 is a flow chart of a SVG parallel machine redundancy control method according to an embodiment of the present invention;
fig. 3 is a flowchart of an SVG control method according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, if there are first, second, third, fourth, etc. described only for the purpose of distinguishing technical features, they are not to be interpreted as indicating or implying relative importance or implying number of indicated technical features or implying precedence of indicated technical features.
In the description of the present invention, unless otherwise explicitly defined, terms such as arrangement, connection and the like should be broadly construed, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the detailed contents of the technical solutions.
An SVG parallel machine redundancy control method according to an embodiment of the first aspect of the present invention is described with reference to fig. 1 to 2.
The SVG parallel machine redundancy control method according to the embodiment of the present invention comprises the following steps:
the method comprises the steps that state information is mutually transmitted between a host and a plurality of slaves, the state information comprises an ID value and operation information, and the operation information comprises an enabled state and an disabled state; if the master machine is not in fault, the operation information of the master machine is in an enabled state, and the operation information of the plurality of slave machines is in an disabled state;
if the master computer fails, reselecting the master computer from a plurality of slave computers which do not fail according to the ID value corresponding to each slave computer; the master and the plurality of slaves correspond to different ID values, and the size of the ID values is related to the priority level selected as the master; and setting the operation information of the reselected master machine to be in an enabled state, and setting the operation information of the unselected slave machines to be in an disabled state.
Referring to fig. 1 and 2, the SVG and the AVC communicate with each other through a LAN network, and the master SVG analyzes and sorts a total reactive instruction of the AVC, calculates the total reactive instruction and distributes the total reactive instruction to the slave SVGs, so as to complete reactive power distribution of the parallel operation network. And the master SVG and the plurality of slave SVGs adopt Aurora high-speed communication to realize efficient transmission of state information.
The state information comprises an ID value and running information, and the ID value of each SVG is different in a parallel machine network formed by the host and the plurality of slave machines, so that after the host breaks down, a new host can be selected by using the ID value to continue subsequent reactive power distribution. Specifically, for example, the smaller the ID value, the higher the corresponding priority level is: the ID value of the host is minimum, other slaves preset a corresponding ID value, and the ID values of all the slaves are different but larger than that of the host; when the master machine is not in fault, the master machine is in an enabled state, other slave machines are in an disabled state, after the master machine is in fault, the master machine is updated to the disabled state, communication between the master machine and the slave machines is disconnected, the slave machines are continuously communicated with each other, the slave machine with the smallest ID value is selected in a one-to-one comparison mode, the slave machine with the smallest ID value is selected as a new master machine, then reactive power calculation and distribution are carried out by the slave machines, and at the moment, the original master machine already exits from a parallel operation network and does not participate in the subsequent parallel operation process; the operation information of the selected master computer is set to be in an activated state, and other slave computers are still set to be in an inactivated state.
In addition, it should be noted that, when the SVG parallel machine redundancy control method according to the embodiment of the present invention selects the minimum ID value, the comparison is not completed on one slave machine, but the comparison is performed on each slave machine.
According to the SVG parallel machine redundancy control method provided by the embodiment of the invention, the ID value is related to the priority level of the selected host, and the ID value is distributed to each SVG, so that a selection basis is provided for reselecting a slave machine with higher priority level as the host machine when the subsequent host machine fails. Through the transmission of the state information between the host and the plurality of the slave machines, the data interaction between the host and the plurality of the slave machines can be realized, so that a foundation is provided for the ID value comparison after the subsequent host faults. And a new host is reselected after the host fails, so that the problem that the idle work cannot be distributed in a parallel operation network formed by the host and the plurality of slave machines is solved, and the operation stability can be effectively improved. Compared with the traditional mode, the SVG parallel machine redundancy control method provided by the embodiment of the invention has the advantages that the redundancy mechanism between the host and the plurality of slave machines is constructed, so that the host can be selected from the slave machines again when the host has a problem, and the stability of working conditions during grid connection is greatly improved.
In some embodiments of the present invention, the ID values of the master and the plurality of slaves are obtained by:
the host and the multiple slaves are subjected to local area networking, different IPs in the same network segment are distributed to the host and the multiple slaves, and the lowest IP value of the IPs is the ID value; the IP distribution of the host and the multiple slaves is completed according to the single machine debugging result, and the size of the ID values corresponding to the multiple IPs is in negative correlation with the priority level selected as the host.
The method comprises the steps of carrying out local area network networking on a host, a plurality of slaves and AVC, then distributing all SVGs such as the host, the slaves and the like after networking to a network segment, and distributing an independent IP for each SVG, wherein each independent IP is different, so that the lowest-order IP value of the IP can be directly used as an ID value. In order to facilitate follow-up selection of slave machines by using ID values, when IP is distributed, IP is not distributed randomly, in actual operation, stand-alone debugging is carried out on each SVG, how the performance of each SVG can be known through debugging, reasonable IP distribution can be carried out according to the performance of each SVG, the minimum IP is generally distributed to the SVG with the best performance and the best stability, and the IP size is distributed from small to large according to the principle. And the smaller the ID value obtained by the IP is, the more excellent the performance of the SVG is, thereby having better priority level. It should be noted here that the initial host has the highest priority and therefore will be assigned the smallest IP.
It should be noted here that the ID value may be set in a different manner, and the sorting and setting may be performed by direct customization, but the ID value is more complicated than the ID value acquisition performed by direct IP.
In some embodiments of the present invention, reselecting the master from the plurality of slaves that have not failed according to the ID value corresponding to each slave, includes the following steps:
setting the operation information of the host machine to be in an disabled state, enabling the host machine to be separated from a grid-connected state, and simultaneously cutting off the communication between the host machine and the AVC and the communication between the host machine and the plurality of slave machines;
if the plurality of slave machines do not receive the state information sent by the host machine within the preset fault judgment time, setting the operation information of the plurality of slave machines to be in an enabling state;
and mutually transmitting state information among the plurality of slave machines, selecting the slave machine with the smallest ID value, taking the selected slave machine as a new master machine, and resetting the operation information of the slave machines which are not selected to be in the disabled state.
When the host fails, the host is set to be in an disabled state, and meanwhile, the host is disconnected from the AVC and other slaves, and the parallel operation network is exited. The host after exiting the network cannot send the state information to the slave, and the slave does not receive the state information sent by the host within the fault determination time, so that the fault of the host can be indicated. At this time, all slave devices will update their own running information to enable state, thereby indicating that the master re-selection phase is started. The multiple slaves can continuously communicate with each other, and by continuously comparing the ID values with the ID values in the received status information, whether the slave is selected as a new master, that is, the slave selected as the master, the ID value of the slave is not necessarily smaller than the ID value of the master in the comparison process. It should be noted that after the selection mode is adopted, if the priority level needs to be modified, only the IP allocation needs to be re-performed, or the IP of one or a few slave machines can be modified independently.
In some embodiments of the present invention, the failure determination time is 10ms, and the communication cycle between the master and the plurality of slaves is 1 ms. The communication cycle of the cross communication between the host and the plurality of the slave machines is 1ms, so that the data updating and processing speed can be ensured to be high, and the phenomenon that the host needs to be selected again and too long time is spent is avoided. The failure determination time is 10ms, which is equivalent to ten communication cycles, and if none of the ten communication cycles receives the status information sent by the host, it can be determined that the host fails to send out the status information. It should be noted that if the slave receives any external status information sent after the time of waiting for the failure determination is exceeded, it may be inferred that the slave may fail, and the slave may be taken out of the network and notified to a maintenance person for viewing on the site.
In some embodiments of the invention, the master and the plurality of slaves are interconnected by LC multimode fibers or single mode fibers in a staggered manner. The LC multimode fiber or the single mode fiber can effectively ensure the communication efficiency and the stability of cross communication between the host and the plurality of slave machines. It should be noted here that, when the amount of data interaction is not large, 485 communication and CAN communication may be performed directly by using a common communication line.
In some embodiments of the present invention, the optical fiber communication board of the master and the optical fiber communication boards of the slaves both use 3 SFP optical fiber ports. When the optical fiber communication board with the 3 SFP optical fiber ports is used, the cross communication between the four SVGs can be guaranteed, the four SVGs are combined, and the use requirements under most conditions can be basically met.
The SVG control method according to the embodiment of the second aspect of the present invention is applied to a local SVG, which is any slave, and comprises the following steps:
receiving state information transmitted by a host and a plurality of slaves, wherein the state information comprises an ID value and operation information, and the operation information comprises an enabled state and an disabled state; if the master machine is not in fault, the operation information of the master machine is in an enabled state, and the operation information of the plurality of slave machines is in an disabled state;
if the state information transmitted by the host cannot be received, comparing the ID value of the local SVG with the ID values transmitted by the plurality of slave machines, and determining whether the local SVG is selected as a new host according to the comparison result; the size of the ID value is related to the priority level selected as the host; if the local SVG is selected as a new host, the running information of the local SVG is set to be in an enabled state, and if the local SVG is not selected as the host, the running information of the local SVG is set to be in an disabled state.
Referring to fig. 1 and 3, the local SVG may be understood as any one of the plurality of slaves, and after the local SVG does not receive the status information sent by the master after the failure determination time, it may determine that the master fails, and at this time, the local SVG updates its own operating information to an enabled status, sends the status information to the other slaves, and receives the status information sent by the other slaves. At this time, the other slaves are also updated to the enabled state from the disabled state, so that after the local SVG receives the state information of the slave including the enabled state, the link of selecting a new master can be determined, at this time, the local SVG compares ID values in all the received state information, if an ID value smaller than the ID value of the local SVG exists in the ID values, it is determined that the priority level of the local SVG is not the current first order, the operation information of the local SVG needs to be updated to the disabled state again, if an ID value smaller than the ID value of the local SVG does not exist in the ID values, it is determined that the priority level of the local SVG is the current first order, it is determined that the local SVG is selected as the new master, and the other slaves are updated to the disabled state again.
According to the SVG control method provided by the embodiment of the invention, by receiving the state information sent by the host and other slave machines, whether the host fails or not can be determined conveniently, and meanwhile, after the host fails, the ID values of the host and other slave machines can be compared one by one, and whether the local SVG can be selected as a new host or not can be finally determined. The SVG control method provided by the embodiment of the invention has the capability of rapidly determining whether the local SVG is selected as a new host when the host fails, and greatly improves the stability of the whole parallel operation network after the host fails.
In some embodiments of the present invention, the basis for selecting a local SVG as a new host is: the ID value of the local SVG is smaller than the received ID values transmitted by the plurality of slaves. Here, a brief explanation will be given of the ID value setting principle. The method comprises the steps of carrying out local area network networking on a host, a plurality of slaves and AVC, then distributing all SVGs such as the plurality of hosts, the slaves and the like after networking to a network segment, and distributing a single IP for each SVG, wherein each independent IP is different, so that the lowest IP value of the IP can be directly used as an ID value. In order to facilitate the follow-up selection of slave machines by using ID values, when IP is distributed, IP is not distributed randomly, in actual operation, stand-alone debugging is carried out on each SVG, the performance of each SVG can be adjusted until the performance of each SVG, reasonable IP distribution can be carried out according to the performance of each SVG, the minimum IP is usually distributed to the SVG with the best performance and the best stability, and the size of the distributed IP is distributed from small to large according to the principle. And the smaller the ID value obtained by the IP is, the more excellent the performance of the SVG is, thereby having better priority level. Therefore, if the local SVG is selected as a new master, the ID value of the local SVG must be minimized among all the slaves participating in the selection. It should be noted here that the initial host has the highest priority and therefore will be assigned the smallest IP.
An SVG control system according to an embodiment of the third aspect of the invention includes:
the information transceiving module is used for receiving state information transmitted by the host and the plurality of slaves, wherein the state information comprises an ID value and operation information, and the operation information comprises an enabled state and an disabled state; if the master machine is not in fault, the operation information of the master machine is in an enabled state, and the operation information of the plurality of slave machines is in an disabled state;
the state setting unit is used for comparing the ID values of the local SVG with the ID values transmitted by the plurality of slave machines when the state information transmitted by the host machine cannot be received, and determining whether the local SVG is selected as a new host machine according to the comparison result; the size of the ID value is related to the priority level selected as the host; wherein, if local SVG is selected as the host computer, the running information of local SVG sets up to enable the state, if not selected as the host computer, the running information of local SVG sets up to not enable the state.
Referring to fig. 1 and 3, the SVG control system is applied to the local SVG, which can be understood as any one of the plurality of slaves, and when the information transceiver module does not receive the status information sent by the master after exceeding the failure determination time, it can be determined that the master fails, and at this time, the status setting unit updates the running information of the status setting unit to the enabled status, sends the status information to the other slaves, and receives the status information sent by the other slaves. At this time, the other slaves are also updated from the disabled state to the enabled state, so that after the information transceiver module receives the state information of the slave including the enabled state, it can be determined to enter a link of selecting a new master, at this time, the state setting unit compares ID values in all the received state information, if an ID value smaller than an ID value of the local SVG exists in the ID values, it is determined that the priority level of the local SVG is not the current first order, it is necessary to update the running information of the local SVG to the disabled state again, and if an ID value smaller than the ID value of the local SVG does not exist in the ID values, it is determined that the priority level of the local SVG is the current first order, it is determined that the local SVG is selected as the new master, and the other slaves are updated to the disabled state again.
According to the SVG control system provided by the embodiment of the invention, the information transceiver module receives the state information sent by the host and other slave machines, so that the state setting unit can conveniently determine whether the host fails or not in a follow-up manner, and meanwhile, after the host fails, the state setting unit can compare the ID value of the local SVG with the ID values of other slave machines one by one, and finally determine whether the local SVG can be selected as a new host or not. The SVG control system provided by the embodiment of the invention has the capability of rapidly determining whether the local SVG is selected as a new host when the host fails, thereby greatly improving the stability of the whole parallel operation network after the host fails.
According to a computer-readable storage medium of an embodiment of the fourth aspect of the invention, the computer-readable storage medium stores computer-executable instructions for causing a computer to execute the SVG control method described above.
The computer-readable storage medium according to the embodiment of the invention has at least the following advantages: storage and transfer of computer-executable instructions may be facilitated by a storage medium.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the embodiments, and those skilled in the art will understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An SVG parallel machine redundancy control method is characterized by comprising the following steps:
the method comprises the steps that state information is mutually transmitted between a master machine and a plurality of slave machines, the state information comprises an ID value and operation information, and the operation information comprises an enabled state and a non-enabled state; if the master machine does not have a fault, the operation information of the master machine is in an enabled state, and the operation information of the plurality of slave machines is in an disabled state;
if the master computer fails, reselecting the master computer from a plurality of slave computers which do not fail according to the ID value corresponding to each slave computer; the master and the plurality of slaves correspond to different ID values, and the size of the ID values is related to the priority level selected as the master; and setting the operation information of the reselected master machine to be in an enabled state, and setting the operation information of the unselected slave machines to be in a non-enabled state.
2. The SVG parallel machine redundancy control method according to claim 1, wherein the ID value of the master and the ID values of the plurality of slaves are obtained by the steps of:
performing local area network networking on the host and the plurality of slaves, and allocating different IPs of the same network segment to the host and the plurality of slaves, wherein the lowest IP value of the IPs is the ID value; and the IP distribution of the host and the plurality of the slaves is completed according to a single machine debugging result, and the size of the ID value corresponding to the plurality of the IPs is negatively related to the priority level selected as the host.
3. The SVG parallel machine redundancy control method according to claim 2, wherein said reselecting a master from a plurality of said slaves that have not failed according to said ID value corresponding to each of said slaves, comprises the steps of:
setting the operation information of the host machine to be in an disabled state, enabling the host machine to be separated from a grid-connected state, and simultaneously cutting off the communication between the host machine and AVC and the communication between the host machine and a plurality of slave machines;
if the slave machines do not receive the state information sent by the host machine within the preset fault judgment time, setting the operation information of the slave machines to be in an enabling state;
and mutually transmitting the state information among the plurality of slave machines, selecting the slave machine with the smallest ID value, taking the selected slave machine as a new master machine, and resetting the operation information of the unselected slave machines to be in an disabled state.
4. The SVG parallel machine redundancy control method according to claim 3, wherein the failure determination time is 10ms, and a communication cycle between the master and a plurality of the slaves is 1 ms.
5. The SVG parallel machine redundancy control method of claim 1, wherein said master machine and a plurality of said slave machines are cross-interconnected by LC multimode fiber or single mode fiber.
6. The SVG parallel machine redundancy control method according to claim 1, wherein the optical fiber communication board of the master machine and the optical fiber communication boards of the plurality of slave machines each employ 3 SFP optical fiber ports.
7. An SVG control method is characterized in that the SVG control method is applied to local SVG which is any slave machine, and the control method comprises the following steps:
receiving state information transmitted by a master and a plurality of slaves, wherein the state information comprises an ID value and operation information, and the operation information comprises an enabled state and an disabled state; if the master machine does not have a fault, the operation information of the master machine is in an enabled state, and the operation information of the plurality of slave machines is in an disabled state;
if the state information transmitted by the host cannot be received, comparing the ID value of the local SVG with the ID values transmitted by the plurality of slave machines, and determining whether the local SVG is selected as a new host according to the comparison result; the size of the ID value is related to the priority level selected as the host; if the local SVG is selected as a new host, the running information of the local SVG is set to be in an enabling state, and if the local SVG is not selected as a host, the running information of the local SVG is set to be in an disabling state.
8. The SVG control method of claim 7, wherein the basis for selecting the local SVG as a new host is: the ID value of the local SVG is smaller than the received ID values transmitted from the plurality of slaves.
9. An SVG control system, comprising:
the information transceiver module is used for receiving state information transmitted by a master machine and a plurality of slave machines, wherein the state information comprises an ID value and operation information, and the operation information comprises an enabled state and an disabled state; if the master machine does not have a fault, the operation information of the master machine is in an enabled state, and the operation information of the plurality of slave machines is in an disabled state;
the state setting unit is used for comparing the ID value of the local SVG with the ID values transmitted by the plurality of slave machines when the state information transmitted by the host machine cannot be received, and determining whether the local SVG is selected as a new host machine according to the comparison result; the size of the ID value is related to the priority level selected as the host; wherein, if local SVG is selected to be the host computer, local SVG's operation information sets up to enable the state, if not selected to be the host computer, local SVG's operation information sets up to not enable the state.
10. A computer-readable storage medium characterized by: the computer-readable storage medium stores computer-executable instructions for causing a computer to execute an SVG control method according to any one of claims 7 to 8.
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