CN110676818A - In-situ bus protection method and system based on star network topology - Google Patents
In-situ bus protection method and system based on star network topology Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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Abstract
The invention provides a local bus protection method and a system based on star network topology, which construct a networking mode of a local distributed bus protection device through the star network topology mode, take any local distributed bus protection device as a protection host and other devices as slaves, the host is respectively connected with each slave through optical fibers, the host and the slaves are also respectively connected with a management unit to form a star network, when protection action occurs, the host judges fault positions according to analog quantity sampling data and switching value knife switch position data transmitted by the slaves, and sends a slave tripping command through the star network, thereby greatly reducing the complexity of direct networking of each slave without influencing the protection function and performance, and further improving the overall reliability of the protection device.
Description
Technical Field
The invention relates to the technical field of on-site protection, in particular to an on-site bus protection method and system based on star network topology.
Background
Compared with the traditional relay protection technology, the in-situ protection technology has the advantages of miniaturization, higher protection level, higher reliability, higher rapidity, more convenient operation and maintenance mode and the like, and the in-situ protection technology is rapidly developed and applied.
At present, the on-site bus protection device has undergone several stages, a distributed protection no-master mode and a management no-master mode are mostly adopted, then a distributed management has a master mode and a protection no-master mode, and each submachine has complete protection logic and is responsible for a corresponding interval split-phase tripping function. The intelligent management system comprises a protection non-master mode, a management non-master mode and an intelligent management unit, wherein each slave machine of the whole set of local bus protection device is required to be connected with the intelligent management unit through an MMS (multimedia messaging service) private network, and the intelligent management bears information transmission between the protection device and a remote maintenance master station; and if the master mode and the protection mode are managed, the management unit is only connected with the management host machine in the in-situ bus protection device, wherein the management command is issued to the management host machine by the management unit and then is synchronized to other sub machines in the in-situ bus device by the management host machine, so that the synchronization of the management command is realized. However, in the present phase, the local distributed bus protection device scheme in any mode has certain defects.
Firstly, only the interaction of analog quantity and switching value is carried out between all submarines without main protection and main mode, and no interaction of other protection logics is carried out, but all the submarines need to run completely consistent protection logics and only take charge of outlets of respective intervals, so that the complete consistency between all the submarines leads to the great increase of the cost of a complete set device, moreover, the inconsistency between a fixed value and a soft pressing plate exists between the submarines, and can directly lead to protection locking, which is not beneficial to field operation and use, meanwhile, because all the submarines are completely consistent in status, each submarines needs to be connected with a management unit, the load of the management unit is increased, and the submarines need to be synchronized when the fixed value and the soft pressing plate are modified, the operation time of the management unit is increased, the operation experience is not friendly for users, and the management unit can generate a large amount of repeated messages because, is not conducive to reading.
Secondly, management has each submachine transmission of main protection no master mode not only including the interaction of analog quantity and switching value, has still increased the one-way transmission of management message simultaneously, has reduced the latency of modifying the definite value and soft clamp plate by management unit to other submachine transmission management message, has still had the message repetition in the receipt of management unit, and the submachine configuration is the same the device complete set with high costs also exists, has increased the transmission of management data frame simultaneously, influences the transmission of sampling message in the network to a certain extent.
Disclosure of Invention
The invention aims to provide a method and a system for protecting an in-place bus based on a star network topology, which aim to solve the problems of high cost, high complexity and low reliability in the existing in-place bus protection system, reduce the cost of in-place protection, reduce the operation and maintenance complexity of a protection device and improve the reliability.
In order to achieve the technical purpose, the invention provides an in-place bus protection method based on a star network topology, which comprises the following operations:
any one local distributed bus protection device is used as a protection host, other devices are used as slaves, the host is respectively connected with each slave through optical fibers, and the host and the slaves are also respectively connected with a management unit to form a star network;
transmitting a plurality of message data in a common port mode through a star network, wherein the message data is subjected to priority scheduling according to configuration information and is transmitted at the same optical port at different priorities;
when the protection action occurs, the host machine judges the fault position according to the analog quantity sampling data and the switching value disconnecting link position data transmitted by the slave machine, and issues a slave machine tripping command through the star network.
Preferably, the plurality of message data include analog quantity sampling data, switching value knife switch position data, uploading data, running state data and supervision data.
Preferably, the master and the slave communicate with each other through a 1000M optical port.
Preferably, the specific flow of the host analyzing the received data frame is as follows:
the host judges whether the frame belongs to the frame received by the host or not through the Ethernet frame header field;
judging whether the data has the messy codes or not according to the frame check;
and determining what type of data frame is according to the APPID and the data TAG label.
Preferably, when a protection action occurs, the management unit receives only corresponding action information and a corresponding message from the host; and the fixed value and the soft pressing plate issued by the management unit only operate the host.
Preferably, the connection relationship of the plurality of in-situ distributed bus protection devices is as follows:
any one local distributed bus protection device is used as a protection host, other devices are used as slaves, the host is respectively connected with each slave through optical fibers, and the host and the slaves are also respectively connected with a management unit to form a star network;
the star network transmits various message data in a common port mode, and the message data is subjected to priority scheduling according to configuration information and is transmitted at the same optical port at different priorities.
Preferably, the plurality of message data include analog quantity sampling data, switching value knife switch position data, uploading data, running state data and supervision data.
Preferably, the master and the slave communicate with each other through a 1000M optical port.
The effect provided in the summary of the invention is only the effect of the embodiment, not all the effects of the invention, and one of the above technical solutions has the following advantages or beneficial effects:
compared with the prior art, the networking mode of the local distributed bus protection device is established in a star network topology mode, and the direct networking complexity of each submachine is greatly reduced under the condition of not influencing the protection function and performance, so that the overall reliability of the protection device is improved; according to the characteristics of in-situ distributed bus protection, one device is selected as a protection host on the basis of the existing looped network in-situ bus protection device, other sub-machines do not have the protection function and can be replaced by a common acquisition device and a tripping outlet device, so that functional differentiation is realized, and the cost of a complete set of bus protection device can be reduced to the greatest extent; the protection host is used as main communication equipment with the management unit, the coupling degree of other sub machines and other management units is reduced, the configuration function of the management unit for protection is centralized on the protection host, only necessary debugging windows of the management unit and the slave machines are reserved, the operation and maintenance complexity of the protection device is reduced, and the load of the management unit is reduced; by adopting a rapid anti-interference redundant data transmission common port technology, the reliability and the reusability of the data transmission of the star topology internal network are realized, the monitoring in the whole life cycle of the device is further improved while the protection performance and the protection reliability are ensured, the stability and the reliability of the device are further improved, and the utilization rate of the internal network is also improved.
Drawings
Fig. 1 is a schematic structural diagram of a looped network type in-situ bus protection system provided in the prior art;
FIG. 2 is a schematic structural diagram of a star-type in-place bus protection system according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a multiple data common port technique according to an embodiment of the present invention.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.
The present invention provides a local bus protection method and system based on star network topology, which is described in detail below with reference to the accompanying drawings.
The embodiment of the invention discloses an in-place bus protection method based on star network topology, which comprises the following operations:
any one local distributed bus protection device is used as a protection host, other devices are used as slaves, the host is respectively connected with each slave through optical fibers, and the host and the slaves are also respectively connected with a management unit to form a star network;
transmitting a plurality of message data in a common port mode through a star network, wherein the message data is subjected to priority scheduling according to configuration information and is transmitted at the same optical port at different priorities;
when the protection action occurs, the host machine judges the fault position according to the analog quantity sampling data and the switching value disconnecting link position data transmitted by the slave machine, and issues a slave machine tripping command through the star network.
Fig. 1 is a ring network topology structure's on-site distributed bus protection device, and it adopts two-way dual ring network connection mode, and a set of distributed bus protection device uses 4 submachine as an example, needs 8 to optical fiber connection at least and needs every submachine to possess 4 1000M optical transceiver interfaces at least, greatly increased the network connection complexity, and 1000M optical transceiver interfaces have improved the whole consumption of device simultaneously, have increased the thermal production of device. Each submachine adopts the same device, and each submachine needs to have complete and independent protection logic, and each submachine is only responsible for the outlet of the interval where the submachine is located, and assuming that the cost of each local bus protection device is N, the cost required for constructing the ring network by four bus devices is about 4 x N.
Fig. 2 is a diagram of an in-situ distributed bus protection device with a star network topology structure according to an embodiment of the present invention, which adopts a star network connection manner, where a host is compatible with a slave machine with a ring network structure, and only 1 pair of optical fibers are required for connecting with other slave machines, and 4 slave machines are taken as an example, the host machine needs 3 pairs of optical fibers at most to realize intercommunication, and the host machine needs only 3 1000M optical ports, and the slave machines need only 1 1000M transceiver port, so that the overall power consumption of the device can be reduced while the network complexity is greatly reduced, and the generation of heat is reduced, thereby better meeting the requirement of low power consumption of an in-situ protection device. Any device in fig. 2 is used as a protection host, the protection function is centralized in the protection host, any modification of a hardware device is not needed, other slave machines only need to be responsible for analog quantity acquisition, disconnecting link position acquisition and a tripping command issued by the protection host, and the slave machines do not need to have an independent protection function, so that the hardware requirements of the slave machines can be simplified, the requirements can be met, the cost of the whole bus protection device is reduced to about 1/2 of the cost of a ring network mode, namely about 2N, the whole protection cost can be effectively reduced, and the popularization of on-site protection is facilitated.
Because the star topology interface protection function is concentrated on one host, when the protection action occurs, the management unit connected with the protection device only receives the corresponding action information and the corresponding message from the host, compared with the protection of a plurality of independent sub-machines of the ring network, the number of the messages received by the management unit is reduced 3/4, and the load of the management unit can be effectively reduced.
Aiming at the ring network type protection submachine, because each submachine is protected independently, each submachine needs independent and same protection fixed value and soft pressing plate, a management unit needs to synchronize to 4 submachines when the fixed value and the soft pressing plate are modified, and if the customization is inconsistent with the setting of the soft pressing plate, the protection function can be locked. The protection host of the star network is the only device with the protection function, only the host is operated when the set value and the soft pressing plate are sent through the management unit, the operation time can be shortened by 3/4, and meanwhile, other hosts do not have the protection set value and the soft pressing plate, so that the protection locking caused by the inconsistency of the set value and the soft pressing plate can be effectively avoided, and the protection reliability is improved.
In the star network, the protection host receives sampling values and disconnecting link positions transmitted by other slave machines to realize protection logic, and sends a tripping command to the corresponding slave machine through the star network according to the fault position to realize fault removal. The embodiment of the invention adopts the rapid anti-interference redundant data transmission common port technology to improve the utilization rate of the star network, as shown in figure 3. Analog quantity sampling data, switching value switch position data, upper calling data, running state data and supervision data are sent and received in a common mode, the analog quantity sampling data and the switching value switch position data are sent to a data bus switching module through a protection data framing module, and the upper calling data, the running state data and the supervision data are sent to an upper calling data buffer area, a running state data buffer area and a supervision data frame sending buffer area respectively and are sent to the data bus switching module. All data are sent to the multi-data frame common port sending and scheduling module through the data bus switching module, the data are transmitted to the sending queue buffer area according to the configuration parameters, and data transmission is carried out through the high-speed sending module.
Firstly, a 1000M optical module is adopted by a star network to sample at a sampling frequency of 4000 points and send protection messages at fixed intervals, data to be monitored by a slave is sent at a certain time interval according to configuration, and the sending of various messages at the same optical port is realized in a priority scheduling mode according to the change randomness of the running state of the slave and the random occurrence of data summoned on the slave by a host. When a plurality of data messages are uploaded, firstly, under the condition of ensuring the transmission of protection messages, the transmission of the messages is adjusted according to the message priority in the configuration file for the transmission sequence of other messages, and the messages which are not transmitted are transmitted one by one in a buffer zone buffer transmission mode.
The data frame transmission frame format adopts a uniform format, as shown in table 1:
TABLE 1
After the host receives the data frame, whether the data frame belongs to the frame received by the host is judged through an Ethernet frame header field, whether the data frame has a messy code or not is judged according to frame verification, and the type of the data frame is determined according to an APPID and a data TAG label, so that the condition of analyzing various messages is achieved.
According to the embodiment of the invention, the networking mode of the local distributed bus protection device is established in a star network topology mode, and the direct networking complexity of each submachine is greatly reduced under the condition of not influencing the protection function and performance, so that the overall reliability of the protection device is improved; according to the characteristics of in-situ distributed bus protection, one device is selected as a protection host on the basis of the existing looped network in-situ bus protection device, other sub-machines do not have the protection function and can be replaced by a common acquisition device and a tripping outlet device, so that functional differentiation is realized, and the cost of a complete set of bus protection device can be reduced to the greatest extent; the protection host is used as main communication equipment with the management unit, the coupling degree of other sub machines and other management units is reduced, the configuration function of the management unit for protection is centralized on the protection host, only necessary debugging windows of the management unit and the slave machines are reserved, the operation and maintenance complexity of the protection device is reduced, and the load of the management unit is reduced; by adopting a rapid anti-interference redundant data transmission common port technology, the reliability and the reusability of the data transmission of the star topology internal network are realized, the monitoring in the whole life cycle of the device is further improved while the protection performance and the protection reliability are ensured, the stability and the reliability of the device are further improved, and the utilization rate of the internal network is also improved.
The embodiment of the invention also discloses an in-place bus protection system based on the star network topology, which comprises a plurality of in-place distributed bus protection devices, wherein the connection relationship of the in-place distributed bus protection devices is as follows:
any one local distributed bus protection device is used as a protection host, other devices are used as slaves, the host is respectively connected with each slave through optical fibers, and the host and the slaves are also respectively connected with a management unit to form a star network;
the star network transmits various message data in a common port mode, and the message data is subjected to priority scheduling according to configuration information and is transmitted at the same optical port at different priorities.
The embodiment of the invention adopts a star network connection mode, the host is compatible with the sub-machine of a ring network structure, only 1 pair of optical fibers is needed when the host is connected with other slave machines, 4 sub-machines are taken as an example, the host can realize intercommunication only by 3 pairs of optical fibers, the host only needs 3 1000M optical ports, and the slave only needs 1 1000M receiving and transmitting port, thereby greatly reducing the complexity of the network and reducing the overall power consumption of the device, reducing the generation of heat and better meeting the requirement of low power consumption of a local protection device. Any device is used as a protection host machine, the protection function is centralized in the protection host machine, no modification is needed to be made on hardware devices, other slave machines only need to be in charge of analog quantity acquisition, disconnecting link position acquisition and a tripping command issued by the protection host machine, and the slave machines do not need to have an independent protection function, so that the hardware requirements of the slave machines can be simplified, the requirements can be met, the cost of the whole bus protection device is reduced to about 1/2 of the cost of a ring network mode, namely about 2N, the whole protection cost can be effectively reduced, and the popularization of on-site protection is facilitated.
Because the star topology interface protection function is concentrated on one host, when the protection action occurs, the management unit connected with the protection device only receives the corresponding action information and the corresponding message from the host, compared with the protection of a plurality of independent sub-machines of the ring network, the number of the messages received by the management unit is reduced 3/4, and the load of the management unit can be effectively reduced.
Aiming at the ring network type protection submachine, because each submachine is protected independently, each submachine needs independent and same protection fixed value and soft pressing plate, a management unit needs to synchronize to 4 submachines when the fixed value and the soft pressing plate are modified, and if the customization is inconsistent with the setting of the soft pressing plate, the protection function can be locked. The protection host of the star network is the only device with the protection function, only the host is operated when the set value and the soft pressing plate are sent through the management unit, the operation time can be shortened by 3/4, and meanwhile, other hosts do not have the protection set value and the soft pressing plate, so that the protection locking caused by the inconsistency of the set value and the soft pressing plate can be effectively avoided, and the protection reliability is improved.
In the star network, the protection host receives sampling values and disconnecting link positions transmitted by other slave machines to realize protection logic, and sends a tripping command to the corresponding slave machine through the star network according to the fault position to realize fault removal. The embodiment of the invention adopts a quick anti-interference redundant data transmission common port technology to improve the utilization rate of a star network, and sends and receives analog quantity sampling data, switching value knife switch position data, uploading data, running state data and supervision data in a common port mode, the analog quantity sampling data and the switching value knife switch position data are sent to a data bus switching module through a protection data framing module, and the uploading data, the running state data and the supervision data are respectively sent to an uploading data buffer area, a running state data buffer area and a supervision data frame sending buffer area and are sent to the data bus switching module. All data are sent to the multi-data frame common port sending and scheduling module through the data bus switching module, the data are transmitted to the sending queue buffer area according to the configuration parameters, and data transmission is carried out through the high-speed sending module.
Firstly, a 1000M optical module is adopted by a star network to sample at a sampling frequency of 4000 points and send protection messages at fixed intervals, data to be monitored by a slave is sent at a certain time interval according to configuration, and the sending of various messages at the same optical port is realized in a priority scheduling mode according to the change randomness of the running state of the slave and the random occurrence of data summoned on the slave by a host. When a plurality of data messages are uploaded, firstly, under the condition of ensuring the transmission of protection messages, the transmission of the messages is adjusted according to the message priority in the configuration file for the transmission sequence of other messages, and the messages which are not transmitted are transmitted one by one in a buffer zone buffer transmission mode. After the host receives the data frame, whether the data frame belongs to the frame received by the host is judged through an Ethernet frame header field, whether the data frame has a messy code or not is judged according to frame verification, and the type of the data frame is determined according to an APPID and a data TAG label, so that the condition of analyzing various messages is achieved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. An in-situ bus protection method based on a star network topology, characterized in that the method comprises the following operations:
any one local distributed bus protection device is used as a protection host, other devices are used as slaves, the host is respectively connected with each slave through optical fibers, and the host and the slaves are also respectively connected with a management unit to form a star network;
transmitting a plurality of message data in a common port mode through a star network, wherein the message data is subjected to priority scheduling according to configuration information and is transmitted at the same optical port at different priorities;
when the protection action occurs, the host machine judges the fault position according to the analog quantity sampling data and the switching value disconnecting link position data transmitted by the slave machine, and issues a slave machine tripping command through the star network.
2. The method according to claim 1, wherein the plurality of message data comprise analog quantity sampling data, switching value knife switch position data, uploading data, running state data and supervision data.
3. The method of claim 1, wherein the master and slave devices communicate via 1000M optical ports.
4. The method for in-place bus protection based on the star network topology as claimed in claim 1, wherein the specific flow of the host computer parsing the received data frame is as follows:
the host judges whether the frame belongs to the frame received by the host or not through the Ethernet frame header field;
judging whether the data has the messy codes or not according to the frame check;
and determining what type of data frame is according to the APPID and the data TAG label.
5. The method according to claim 1, wherein when a protection action occurs, the management unit receives only corresponding action information and a corresponding message from the host; and the fixed value and the soft pressing plate issued by the management unit only operate the host.
6. An on-site bus protection system based on a star network topology comprises a plurality of on-site distributed bus protection devices, and is characterized in that the connection relationship of the on-site distributed bus protection devices is as follows:
any one local distributed bus protection device is used as a protection host, other devices are used as slaves, the host is respectively connected with each slave through optical fibers, and the host and the slaves are also respectively connected with a management unit to form a star network;
the star network transmits various message data in a common port mode, and the message data is subjected to priority scheduling according to configuration information and is transmitted at the same optical port at different priorities.
7. The in-place bus protection system based on the star network topology as recited in claim 6, wherein the plurality of message data comprise analog quantity sampling data, switching value knife switch position data, uploading data, running state data and supervision data.
8. An in-place bus protection system based on star network topology, according to claim 6, characterized in that said master and slave are communicating through 1000M optical port.
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