CN110784365A - Standby device of station control layer and entity device of transformer substation and automatic online method thereof - Google Patents
Standby device of station control layer and entity device of transformer substation and automatic online method thereof Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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Abstract
The invention relates to a standby device of a station control layer and an entity device of a transformer substation and an automatic online method thereof, belonging to the technical field of communication, wherein the standby device comprises a management module and virtual modules used as standby of the entity device, each virtual module is provided with a CID (CID) engineering file and a CCD (charge coupled device) engineering file which are the same as those of the corresponding entity device, and each virtual module acquires a GOOSE message sent by the entity device from a GOOSE network of the station control layer through the management module; the management module judges the link state of the entity device according to the GOOSE message sent by the receiving entity device, and controls the corresponding virtual module to exit when the link state is in a connection state; and controlling the corresponding virtual module to be put into when the link is in the broken state. The invention can realize the standby function of all the entity devices in the station control layer by using one standby device, greatly reduces the hardware cost, can quickly and effectively realize the automatic switching of the input and exit states of the virtual module according to the states of the entity devices, and has good practical value.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a standby device of a station control layer and an entity device of a transformer substation and an automatic online method thereof.
Background
In the prior art, in order to ensure normal operation in a station control layer of a digital substation (or an intelligent substation), an entity device of the station control layer is generally provided with a corresponding standby entity device, and the standby entity device is used for switching in when a link of a main entity device is disconnected, so that normal operation of the station control layer is realized. However, the cost of configuring the standby entity device is too large due to the too large number of entity devices in the station control layer.
In addition, because the workload of engineering configuration of 61850 stations is relatively large, the centralized device is a uniform ICD model file according to the whole device during configuration, each logic CPU (virtual module) is used as a part of the whole device model, if one logic CPU needs to be changed, because public information exists in the model file, the ICD model file of the device needs to be changed, the public information (such as a data template) needs to be changed along with the change, the communication of other logic CPUs is possibly influenced, and the influence is relatively large.
Disclosure of Invention
The invention aims to provide a station control layer of a transformer substation, a standby device of an entity device and an automatic online method thereof, which are used for solving the problem of high cost caused by the fact that a large number of entity devices are adopted as standby devices in the station control layer in the prior art.
Based on the purpose, the technical scheme of the standby device of the entity device in the station control layer of the transformer substation is as follows:
the standby device comprises a management module and virtual modules serving as standby of the entity device, wherein each virtual module is provided with a CID (device identifier) engineering file and a CCD (charge coupled device) engineering file which are the same as those of the corresponding entity device, and is used for acquiring GOOSE messages sent by the entity device from a GOOSE network of a station control layer through the management module;
the management module is used for judging the link state of the entity device according to the GOOSE message sent by the receiving entity device, and controlling the corresponding virtual module to exit when the link state of the entity device is in a connection state; and when the link state of the entity device is the broken link state, controlling the corresponding virtual module to be put into use to replace the corresponding entity device to send and receive the corresponding GOOSE message.
The beneficial effects of the above technical scheme are:
the invention adopts a standby device, virtual modules with the number equivalent to that of the entity devices in the station control layer are arranged in the standby device to serve as the standby of the corresponding entity devices, and the management module can realize the switching control of the virtual modules according to the detected link state of the entity devices. In terms of hardware, one physical device (namely, one standby device) can be used as a standby device for all physical devices in operation, so that the cost of the standby device is greatly reduced. In addition, the CID engineering file and the CCD engineering file which are the same as those of the entity device are configured in the standby virtual module, the virtual module models are mutually independent, the function of the entity device is replaced, the automatic switching of the input state and the exit state of the virtual module according to the state of the entity device can be quickly and effectively realized, the efficient switching of the virtual module and the entity device is realized, and the practical value is good.
In order to realize the determination of the link state of the entity device, the determining the link state of the entity device includes:
after receiving a GOOSE message sent by an entity device, when a management module does not receive a next frame GOOSE message sent by the entity device within a set time, determining that the link state of the entity device is a broken link state; and when the management module receives a next frame GOOSE message sent by the entity device within a set time, judging that the link state of the entity device is a connection state.
In order to realize the automatic input and exit control of the virtual module, when the link state of the entity device is a connection state or a broken link state, an input control word or an exit control word corresponding to the virtual module is set, so that the automatic input and exit of the corresponding virtual module are realized.
In order to realize the sending of the GOOSE message after the virtual module is put into use, the management module acquires the configuration information of the GOOSE message from the CCD engineering file of the virtual module, and performs multicast registration sending according to the configuration information of the GOOSE message.
Before judging the link state of the entity device, the management module also judges the GOOSE message sent by the entity device, and the judgment is divided into two judgment modes, wherein the first judgment mode comprises the following steps:
judging whether a source MAC address in the received GOOSE message is consistent with a source MAC address used by the virtual module, if not, judging that the received GOOSE message is the GOOSE message sent by the entity device; and if the GOOSE message is consistent with the virtual module, judging that the received GOOSE message is a self-loop message of the virtual module.
The second judgment method comprises the following steps:
judging whether the AppID and the source MAC address in the received GOOSE message are consistent with the AppID in the CID engineering file and/or the CCD engineering file, judging whether the source MAC address in the received GOOSE message is consistent with the source MAC address used by the virtual module, and judging that the received GOOSE message is the GOOSE message sent by the entity device if the AppID is consistent with the source MAC address.
Based on the purpose, the technical scheme of the station control layer of the transformer substation is as follows:
the system comprises a plurality of entity devices, wherein the entity devices are used for receiving and transmitting GOOSE messages through a GOOSE network, each entity device is also used for sending MMS messages to a station control layer through an MMS network, and the system also comprises the standby device.
The beneficial effects of the above technical scheme are:
the station control layer of the invention can realize the standby function of all entity devices in the station control layer by using one standby device, thereby greatly reducing the hardware cost, and the standby device can quickly and effectively realize the automatic switching of the input and exit states of the virtual module according to the state of the entity device, thereby realizing the high-efficiency switching of the virtual module and the entity device and having good practical value.
Based on the above purpose, the technical scheme of the automatic on-line method of the standby device is as follows:
receiving a GOOSE message sent by an entity device, judging the link state of the entity device, and controlling a corresponding virtual module to exit when the link state of the entity device is a connection state; and when the link state of the entity device is the broken link state, controlling the corresponding virtual module to be put into use to replace the corresponding entity device to send and receive the corresponding GOOSE message.
The beneficial effects of the above technical scheme are:
the automatic online method can quickly and effectively realize the automatic switching of the input and exit states of the virtual module according to the state of the entity device, realizes the efficient switching of the virtual module and the entity device, ensures the stability of the normal operation of the station control layer, and has good practical value.
Drawings
FIG. 1 is a schematic diagram of a station level of the present invention;
FIG. 2 is a flow chart of a method for automatic loading and unloading of virtual modules of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
Station control layer embodiment:
the station control layer shown in fig. 1 includes three entity devices and a standby device, where the three entities are an entity device 1, an entity device 2, and an entity device 3, where the entity devices transmit and receive GOOSE messages through a GOOSE network, and each entity device further sends an MMS message to the station control layer through an MMS network; in fig. 1, one standby device includes a management module and three virtual modules, where the three virtual modules are respectively a virtual module 1, a virtual module 2, and a virtual module 3, and are respectively used as standby for an entity device 1, an entity device 2, and an entity device 3.
In fig. 1, each virtual module is configured with CID engineering files and CCD engineering files that are completely the same as the corresponding entity device (e.g., CID1/CCD1 in entity device 1 corresponds to CID1/CCD1 in virtual module 1), the CCD engineering files/CID engineering files include configuration information of GOOSE send messages and GOOSE receive messages, such as destination MAC, AppID, and gotbcef, and each virtual module obtains, through a management module, a GOOSE message sent by an entity device from a GOOSE network in a slave layer.
The GOOSE protocol is a fast, publishing and subscribing protocol, and by using the characteristics, the virtual module sends information by subscribing GOOSE, so that fast online judgment of the entity device is realized, and the source MAC of each entity device (including the added virtual module) when sending the GOOSE message needs to fill a real network card, namely an MAC network card, for sending the message.
The management module receives the GOOSE message by using a Packet Capture Library (PCAP) technology, analyzes an AppID and a source MAC address of the GOOSE message (without analyzing TDL channel data), determines whether the GOOSE message is sent by the entity device, and then determines a link state of the entity device according to the GOOSE message sent by the receiving entity device. Specifically, the step of determining whether the GOOSE packet is sent by the entity apparatus is as follows:
judging whether the AppID and the source MAC address in the received GOOSE message are consistent with the AppID in the CID engineering file and/or the CCD engineering file, judging whether the source MAC address in the received GOOSE message is consistent with the source MAC address used by the virtual module, and judging that the received GOOSE message is the GOOSE message sent by the entity device if the AppID is consistent with the source MAC address.
As another embodiment, the method may further include determining whether a source MAC address in the received GOOSE message is consistent with a source MAC address used by the virtual module, and if not, determining that the received GOOSE message is the GOOSE message sent by the entity device; and if the GOOSE message is consistent with the virtual module, judging that the received GOOSE message is a self-loop message of the virtual module.
After the management module determines that the received GOOSE packet is the GOOSE packet sent by the entity device, the management module uses a link disconnection determining mechanism of 396 standard (i.e., Q/GDW396) to determine the link state of the entity device by the following specific steps:
after receiving the GOOSE message sent by the entity device, when the management module does not receive the GOOSE message with the same st (state number) and the same sq (sequence number) plus 1 sent by the entity device within the set time 4 × T0(T0 is the allowed survival time of the message), determining that the link state of the entity device is the broken link state; when the management module receives a GOOSE message, which is sent by the entity device and has the same frame st and the same sq plus 1, within the set time 4 × T0, it determines that the link state of the entity device is the connection state.
When the link state of the entity device is a connection state, controlling the corresponding virtual module to exit; and when the link state of the entity device is a broken link state, controlling the corresponding virtual module to be put into use to replace the corresponding entity device to send and receive the corresponding GOOSE message. Specifically, when the link state of the entity apparatus is the connection state or the disconnection state, an input control word (for example, "1") or an exit control word (for example, "0") corresponding to the virtual module is set, so as to implement automatic input and exit of the corresponding virtual module, as shown in fig. 2.
After the virtual module is put into use, the standby device replaces the entity device in the broken link state to work, and the management module acquires configuration information of messages sent by the GOOSE and configuration information of messages received by the GOOSE according to the CCD engineering files of the virtual module, and performs multicast registration sending and receiving.
In this embodiment, the CID engineering file and the CCD engineering file that are the same as those of the entity device are configured in the virtual module as the backup, each virtual module has its own independent ICD model file, and there is no public information between them, and each virtual module model is independent of each other, replacing the function of the entity device, and being capable of quickly and effectively realizing automatic switching of the states of the virtual module according to the state of the entity device, and realizing efficient switching between the virtual module and the entity device, has a very good practical value.
Standby device embodiment:
the embodiment provides a standby device of an entity device in a station control layer of a transformer substation, which comprises a management module and a plurality of virtual modules, wherein the number of the virtual modules corresponds to the number of the entity devices and is used as the standby of the entity devices. Since the standby device has already been described in detail in the station control layer embodiment, this embodiment is not described again.
The embodiment of the online method comprises the following steps:
the embodiment provides an automatic online method of a standby device, which comprises the following steps:
after receiving a GOOSE message sent by an entity device, judging the link state of the entity device, and controlling a corresponding virtual module to exit when the link state of the entity device is a connection state; and when the link state of the entity device is a broken link state, controlling the corresponding virtual module to be put into use to replace the corresponding entity device to send and receive the corresponding GOOSE message.
Since the automatic online of the standby device is controlled by management, the input control of the standby device has been described in detail in the station control layer embodiment, and therefore, the detailed description is omitted in this embodiment.
Claims (8)
1. A standby device of an entity device in a station control layer of a transformer substation is characterized in that the standby device comprises a management module and virtual modules used as standby of the entity device, wherein each virtual module is provided with a CID (CID) engineering file and a CCD (charge coupled device) engineering file which are the same as those of the corresponding entity device, and each virtual module is used for acquiring a GOOSE message sent by the entity device from a GOOSE network of the station control layer through the management module;
the management module is used for judging the link state of the entity device according to the GOOSE message sent by the receiving entity device, and controlling the corresponding virtual module to exit when the link state of the entity device is in a connection state; and when the link state of the entity device is the broken link state, controlling the corresponding virtual module to be put into use to replace the corresponding entity device to send and receive the corresponding GOOSE message.
2. The backup device of an entity device in a station control layer of a substation according to claim 1, wherein said determining the link status of the entity device comprises:
after receiving a GOOSE message sent by an entity device, when a management module does not receive a next frame GOOSE message sent by the entity device within a set time, determining that the link state of the entity device is a broken link state; and when the management module receives a next frame GOOSE message sent by the entity device within a set time, judging that the link state of the entity device is a connection state.
3. The standby device of the entity device in the station control layer of the substation according to claim 1 or 2, wherein when the link state of the entity device is a connection state or a disconnection state, an input control word or an exit control word corresponding to the virtual module is set, thereby realizing automatic input and exit of the corresponding virtual module.
4. The backup device of the entity device in the station control layer of the substation according to claim 1, wherein the management module obtains configuration information of a GOOSE message from a CCD engineering file of the virtual module, and performs multicast registration transmission according to the configuration information of the GOOSE message.
5. The standby device of the entity device in the station control layer of the substation according to claim 1, wherein the management module further determines a GOOSE message sent by the entity device before determining the link status of the entity device, and the steps are as follows:
judging whether a source MAC address in the received GOOSE message is consistent with a source MAC address used by the virtual module, if not, judging that the received GOOSE message is the GOOSE message sent by the entity device; and if the GOOSE message is consistent with the virtual module, judging that the received GOOSE message is a self-loop message of the virtual module.
6. The standby device of the entity device in the station control layer of the substation according to claim 1, wherein the management module further determines a GOOSE message sent by the entity device before determining the link status of the entity device, and the steps are as follows:
judging whether the AppID and the source MAC address in the received GOOSE message are consistent with the AppID in the CID engineering file and/or the CCD engineering file, judging whether the source MAC address in the received GOOSE message is consistent with the source MAC address used by the virtual module, and judging that the received GOOSE message is the GOOSE message sent by the entity device if the AppID is consistent with the source MAC address.
7. A station control layer of a transformer substation comprises a plurality of entity devices, wherein the entity devices are used for receiving and sending GOOSE messages through a GOOSE network, and are also used for sending MMS messages to the station control layer through an MMS network, and the station control layer of the transformer substation is characterized by further comprising the standby device as claimed in any one of claims 1 to 6.
8. An automatic on-line method of a standby device, wherein the standby device is the standby device according to any one of claims 1 to 6, the automatic on-line method comprising the steps of:
receiving a GOOSE message sent by an entity device, judging the link state of the entity device, and controlling a corresponding virtual module to exit when the link state of the entity device is a connection state; and when the link state of the entity device is the broken link state, controlling the corresponding virtual module to be put into use to replace the corresponding entity device to send and receive the corresponding GOOSE message.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111355303A (en) * | 2020-03-24 | 2020-06-30 | 南京国电南自电网自动化有限公司 | Method and system for synchronizing operation parameters of centralized backup measurement and control device and main measurement and control device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871716A (en) * | 2016-05-26 | 2016-08-17 | 北京博维亚讯技术有限公司 | VRRP (virtual router redundancy protocol) based link monitoring method and system |
| CN106329720A (en) * | 2016-05-13 | 2017-01-11 | 中国电力科学研究院 | Detecting and debugging method for reconstruction and extension project secondary system for intelligent substation |
| CN109474072A (en) * | 2018-11-20 | 2019-03-15 | 国电南瑞科技股份有限公司 | A kind of intelligent substation cluster measure and control device and its traffic model generation method |
| CN109474071A (en) * | 2018-11-10 | 2019-03-15 | 王浩 | A kind of public network virtue fire Intelligent transformer station |
| CN110350661A (en) * | 2019-07-12 | 2019-10-18 | 南京国电南自电网自动化有限公司 | Virtual measurement and control unit and entity observing and controlling seamless handover method |
-
2019
- 2019-11-09 CN CN201911091076.9A patent/CN110784365A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329720A (en) * | 2016-05-13 | 2017-01-11 | 中国电力科学研究院 | Detecting and debugging method for reconstruction and extension project secondary system for intelligent substation |
| CN105871716A (en) * | 2016-05-26 | 2016-08-17 | 北京博维亚讯技术有限公司 | VRRP (virtual router redundancy protocol) based link monitoring method and system |
| CN109474071A (en) * | 2018-11-10 | 2019-03-15 | 王浩 | A kind of public network virtue fire Intelligent transformer station |
| CN109474072A (en) * | 2018-11-20 | 2019-03-15 | 国电南瑞科技股份有限公司 | A kind of intelligent substation cluster measure and control device and its traffic model generation method |
| CN110350661A (en) * | 2019-07-12 | 2019-10-18 | 南京国电南自电网自动化有限公司 | Virtual measurement and control unit and entity observing and controlling seamless handover method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111355303A (en) * | 2020-03-24 | 2020-06-30 | 南京国电南自电网自动化有限公司 | Method and system for synchronizing operation parameters of centralized backup measurement and control device and main measurement and control device |
| CN111355303B (en) * | 2020-03-24 | 2021-10-22 | 南京国电南自电网自动化有限公司 | Method and system for synchronizing operation parameters of centralized backup measurement and control device and main measurement and control device |
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