CN106787218B - Intelligent wide-area distributed multi-source differential protection management system - Google Patents
Intelligent wide-area distributed multi-source differential protection management system Download PDFInfo
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- CN106787218B CN106787218B CN201710152807.0A CN201710152807A CN106787218B CN 106787218 B CN106787218 B CN 106787218B CN 201710152807 A CN201710152807 A CN 201710152807A CN 106787218 B CN106787218 B CN 106787218B
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- 238000013507 mapping Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 7
- 241000272814 Anser sp. Species 0.000 claims description 6
- 108700009949 PTP protocol Proteins 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000007726 management method Methods 0.000 description 10
- 238000012423 maintenance Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
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- 238000010276 construction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
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- H02J13/0013—
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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
- 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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/128—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment involving the use of Internet protocol
Abstract
The invention discloses an intelligent wide-area distributed multi-source differential protection management system, and belongs to the technical field of power system distribution automation. Due to the fact that the power distribution areas are wide and scattered, the distribution network data stored by the distribution terminals distributed in the power distribution areas are shared in the whole power distribution areas through the internet and uploaded to the cloud end, and the cloud server stores the data in a classified mode and issues the data to the whole area according to requirements. Terminals distributed in the whole area acquire and sort the information by subscribing the information published by the cloud server, and adjust the protection logic and the fixed value at any time. The invention provides a multisource differential protection system suitable for a multisource distributed distribution network terminal architecture, which can dynamically modify a protection constant value and topology configuration on line on the premise of ensuring the cost, and provides a good management environment for distributed differential protection.
Description
Technical Field
The invention discloses an intelligent wide-area distributed multi-source differential protection management system, and belongs to the technical field of power system distribution automation.
Background
The distributed differential protection is that different distribution network measurement and control protection terminals distributed in the same area are used for obtaining the incoming current and the outgoing current in the area through optical fiber or 4G wireless communication, and whether the current area is in a fault state is judged through a differential protection algorithm.
The distributed differential protection is a means in distribution network fault detection, but the operation environment of a distribution network is complex and often changes, and in actual operation, once the operation environment changes, if the differential protection function cannot modify a fixed value in real time, the protection malfunction or misoperation can be caused. The current distributed differential protection conditions are as follows:
1. the distribution network has a high operation environment and cannot be used in an excessively complex operation environment, such as multi-source and multi-branch.
2. The requirement on the operation environment is relatively stable, the topological structure in the region cannot be changed, and the equipment parameters cannot be changed when the equipment is replaced for 1 time.
3. Cost, because once differential protection is deployed, operation data of other terminals in an area needs to be acquired, the distance between the terminals is many kilometers or more, the cost of deploying optical fiber is too high, the 3G wireless communication speed is slow, and signals are unstable.
4. And data is stored, the data which can be stored by the terminal is less, the terminal data in the whole area is very much, and the data structures of the terminals of different manufacturers are different. Many data can only be set during the debugging phase and cannot be dynamically retrieved once the running changes are very troublesome.
5. Time synchronization, in distributed differential protection, the data of the protection channel participating in calculation is derived from other distributed terminals, the problem of time synchronization of the data is inevitably faced, the requirement on time precision is high, and once the time synchronization has an error, the protection is faced with the condition of misoperation or rejection. Because the distribution network terminals are widely distributed, if a high-precision time setting mode is deployed, the construction cost of the distribution network is greatly improved.
Therefore, in the current field of power distribution, distributed differential protection cannot be deployed on a large scale in a power distribution network.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a wide-area distributed multi-source differential protection management system based on the internet data storage technology aiming at the defects of the background technology, and ensure the deployment and operation of the distributed differential protection function in the power distribution terminal on the premise of not increasing the cost.
The invention adopts the following technical scheme for realizing the aim of the invention:
the utility model provides a wide area distribution formula multisource differential protection management system, includes web server and the high in the clouds server of setting at main website that sets up in each regional electric network, its characterized in that:
each terminal in each regional power grid is configured with a web server, distributed web services are provided for the whole network formed by each web server and a cloud server, and database services are deployed; the method comprises the steps that a web server serves as a web client in a regional power grid and actively acquires terminal data provided by other terminals in the regional power grid, wherein the terminal data comprise real-time voltage and current data, switching state data, goose open-in data and goose open-out data;
the method comprises the steps that a cloud server is deployed in a master station in a regional power grid, a VPN virtual private network is configured for all terminals in the regional power grid, and after a certain terminal is electrified and started to be connected with a corresponding web server, the cloud server provides connection services and data uploading and downloading services of all current online terminals for the terminal;
deploying a wireless clock synchronization network in a regional power grid, and carrying out time synchronization on a cloud server and all terminals by adopting a high-precision Ethernet time-sharing PTP (precision time protocol);
the method comprises the steps that a distributed differential protection module is deployed at each terminal in a regional power grid, obtained terminal data provided by other terminals are classified and stored in a web database, stored information is analyzed, channel mapping is provided for terminal protection, and data are provided for differential protection; the channel mapping means that the local distribution network terminal receives data of a certain physical channel of an adjacent distribution network terminal device and needs to map the data into a channel corresponding to a local buffer area.
The invention further comprises the following preferred embodiments:
and an internal localUTC time scale is adopted between the terminals, so that the precision reaches us level.
After the terminal is started, the terminal is connected with the cloud server through the VPN, and the web configuration information of the terminal is uploaded to the cloud server, wherein the configuration information comprises the model, the address, the MAC, the geographic position, the switch ID controlled by the terminal, the functional pressing plate to which the terminal needs to be put, and other functional configuration parameters.
The cloud server stores the terminal data transmitted from each terminal in a database deployed by the cloud server, and transmits all terminal data in the regional power grid to each terminal through web services.
And the terminal analyzes and calculates the terminal data transmitted by the cloud server to obtain the configuration information of the switches deployed around the terminal and the terminals around the terminal.
The terminal analyzes and calculates the acquired web configuration information of other surrounding terminals, matches and calculates the protection channel participating in calculation with the acquired data of other terminals, and forms new channel mapping and protection fixed values.
After the terminals are subjected to unified time synchronization by the cloud server through a high-precision Ethernet time service PTP protocol, internal unified localUTC time scale is adopted, namely, clock counting with the precision within 1us is adopted, and distributed differential protection modules configured for the terminals compare localUTC of terminal data sent by other terminals and receive data conforming to time synchronization.
The distributed differential protection module configured for each terminal needs to quit protection under the following conditions:
(1) when the terminal web server acquires the cloud server information, the distributed differential protection function exits, and local protection is put into use;
(2) when the configuration information of the peripheral terminal is acquired, the distributed differential protection function exits, and the local protection is put into use;
(3) distributed differential protection modules generate channel mappings) and protection fixed values, all protection functions exit;
(4) the distributed differential protection function exits without clock synchronization and unifies the terminals of the internal localUTC time scale, and the local protection is put into operation.
By adopting the technical scheme, the invention has the following beneficial effects:
the dynamic topological structure information and the protection fixed value can be obtained according to the change condition of surrounding primary or secondary equipment, and the workload of operation and maintenance is greatly reduced.
The information of the primary equipment and the secondary equipment in the area is not stored and calculated in a centralized manner, and the terminals distributed in the area are utilized to the maximum degree.
The real-time performance and flexibility of the distributed differential protection during the change and maintenance of the processing equipment are greatly enhanced, and the reliable operation of the power distribution system is ensured.
Drawings
FIG. 1 is a schematic diagram of an overall structure of a wide-area distributed multi-source differential protection management system;
FIG. 2 is an embodiment of accessing a new power distribution terminal;
FIG. 3 is an embodiment of a change in a secondary configuration parameter of a power distribution terminal;
fig. 4 is an embodiment of a power distribution terminal with a change in a primary device parameter.
Detailed Description
The technical scheme of the invention is further described in detail by combining the drawings and the specific embodiments in the specification.
Fig. 1 is a schematic diagram of the overall structure of a wide-area distributed multi-source differential protection management system. The wide-area distributed multi-source differential protection management system comprises web servers arranged in regional power networks and cloud servers arranged in a main station. Each terminal in each regional power grid is configured with a web server, distributed web services are provided for the whole network formed by each web server and a cloud server, and database services are deployed; the web server is used as a web client in the regional power grid and actively acquires terminal data provided by other terminals in the regional power grid, wherein the terminal data comprises real-time voltage and current data, switching state data, goose open-in data and goose open-out data.
The method comprises the steps that a cloud server is deployed in a master station in a regional power grid, a VPN virtual private network is configured for all terminals in the regional power grid, and after a certain terminal is electrified and started to be connected with a corresponding web server, the cloud server provides connection services and data uploading and downloading services of all current online terminals for the terminal; a wireless clock synchronization network is deployed in a regional power grid, and a high-precision Ethernet time service PTP protocol is adopted to time a cloud server and all terminals. The method comprises the steps that a distributed differential protection module is deployed at each terminal in a regional power grid, obtained terminal data provided by other terminals are classified and stored in a web database, stored information is analyzed, channel mapping is provided for terminal protection, and data are provided for differential protection; the channel mapping means that the local distribution network terminal receives data of a certain physical channel of an adjacent distribution network terminal device and needs to map the data into a channel corresponding to a local buffer area.
The web server is used as a web client in the regional power grid, and actively acquires terminal data provided by other terminals in the regional power grid, so that rapid data interaction in the regional power grid is realized.
The method comprises the steps that a cloud server is deployed in a main station in the regional power grid, a VPN virtual private network is configured for all terminals in the regional power grid, and after a certain terminal is powered on and starts to be connected with a corresponding web server, the cloud server provides connection services and data uploading and downloading services of all current online terminals for the terminal.
After the terminal is started, the terminal is connected with the cloud server through the VPN, and the web configuration information of the terminal is uploaded to the cloud server, wherein the configuration information comprises the model, the address, the MAC, the geographic position, the switch ID controlled by the terminal, the functional pressing plate to which the terminal needs to be put, and other functional configuration parameters. The cloud server stores the terminal data transmitted from each terminal in a database deployed by the cloud server, and transmits all terminal data in the regional power grid to each terminal through web services. And the terminal analyzes and calculates the terminal data transmitted by the cloud server to obtain the configuration information of the switches deployed around the terminal and the terminals around the terminal.
The terminal analyzes and calculates the acquired web configuration information of other surrounding terminals, matches and calculates the protection channel participating in calculation with the acquired data of other terminals, and forms new channel mapping and protection fixed values.
After the terminals are subjected to unified time synchronization by the cloud server through a high-precision Ethernet time service PTP protocol, internal unified localUTC time scale is adopted, namely, clock counting with the precision within 1us is adopted, and distributed differential protection modules configured for the terminals compare localUTC of terminal data sent by other terminals and receive data conforming to time synchronization.
The distributed differential protection module configured for each terminal needs to quit protection under the following conditions:
(1) when the terminal web server acquires the cloud server information, the distributed differential protection function exits, and local protection is put into use;
(2) when the configuration information of the peripheral terminal is acquired, the distributed differential protection function exits, and the local protection is put into use;
(3) distributed differential protection modules generate channel mappings) and protection fixed values, all protection functions exit;
(4) the distributed differential protection function exits without clock synchronization and unifies the terminals of the internal localUTC time scale, and the local protection is put into operation.
As shown in fig. 2 below, when a terminal 5 is added to a terminal in a region, the terminal 5 notifies a cloud server, the cloud server notifies all terminals in the region, and a protection management module of another terminal determines whether it is necessary to acquire detailed device information of the newly added device (terminal 5) through calculation and analysis, and recalculates and configures a protection setting value and a protection function according to the acquired information.
As shown in fig. 3 below, when the terminal 2 in the area enters the maintenance state or the switch protection action corresponding to the terminal 2 causes the switch to trip, the terminal 2 will notify the cloud server, and the cloud server notifies all terminals in the area, the protection management module of the adjacent terminals (terminal 1, terminal 3, and terminal 4) in the area will change the differential calculation logic, and the switch corresponding to the terminal entering the maintenance state will not be included in the differential protection channel calculation.
As shown in fig. 4, when a primary device parameter covered by the terminal 1 in the area changes, the terminal 1 needs to notify the cloud server, the cloud server notifies all terminals in the area, and the other terminal protection management modules determine whether to query the terminal for configuration information and update the differential protection setting value according to data analysis.
Claims (8)
1. The utility model provides a wide area distribution formula multisource differential protection management system, includes web server and the high in the clouds server of setting at main website that sets up in each regional electric network, its characterized in that:
each terminal in each regional power grid is configured with a web server, distributed web services are provided for the whole network formed by each web server and a cloud server, and database services are deployed; the method comprises the steps that a web server serves as a web client in a regional power grid and actively acquires terminal data provided by other terminals in the regional power grid, wherein the terminal data comprise real-time voltage and current data, switching state data, goose open-in data and goose open-out data;
the method comprises the steps that a cloud server is deployed in a master station in a regional power grid, a VPN virtual private network is configured for all terminals in the regional power grid, and after a certain terminal is electrified and started to be connected with a corresponding web server, the cloud server provides connection services and data uploading and downloading services of all current online terminals for the terminal;
deploying a wireless clock synchronization network in a regional power grid, and carrying out time synchronization on a cloud server and all terminals by adopting a high-precision Ethernet time-sharing PTP (precision time protocol);
the method comprises the steps that a distributed differential protection module is deployed at each terminal in a regional power grid, obtained terminal data provided by other terminals are classified and stored in a web database, stored information is analyzed, channel mapping is provided for terminal protection, and data are provided for differential protection; the channel mapping means that the local distribution network terminal receives data of a certain physical channel of an adjacent distribution network terminal device and needs to map the data into a channel corresponding to a local buffer area.
2. The wide area distributed multi-source differential protection management system of claim 1, wherein:
and an internal localUTC time scale is adopted between the terminals, so that the precision reaches us level.
3. The wide area distributed multi-source differential protection management system of claim 1, wherein:
after the terminal is started, the terminal is connected with the cloud server through the VPN, and the web configuration information of the terminal is uploaded to the cloud server, wherein the configuration information comprises the model, the address, the MAC, the geographic position, the switch ID controlled by the terminal, the functional pressing plate to which the terminal needs to be put, and other functional configuration parameters.
4. The wide area distributed multi-source differential protection management system of claim 3, wherein:
the cloud server stores the terminal data transmitted from each terminal in a database deployed by the cloud server, and transmits all terminal data in the regional power grid to each terminal through web services.
5. The wide area distributed multi-source differential protection management system of claim 4, wherein:
and the terminal analyzes and calculates the terminal data transmitted by the cloud server to obtain the configuration information of the switches deployed around the terminal and the terminals around the terminal.
6. The wide area distributed multi-source differential protection management system of claim 1, wherein:
the terminal analyzes and calculates the acquired web configuration information of other surrounding terminals, matches and calculates the protection channel participating in calculation with the acquired data of other terminals, and forms new channel mapping and protection fixed values.
7. The wide area distributed multi-source differential protection management system of claim 1, wherein:
after the terminals are subjected to unified time synchronization by the cloud server through a high-precision Ethernet time service PTP protocol, the terminals adopt internal unified localUTC time scale, namely clock counting with the precision within 1us, and distributed differential protection modules configured for the terminals compare localUTC of terminal data sent by other terminals and receive data conforming to time synchronization.
8. The wide area distributed multi-source differential protection management system of claim 1, wherein:
the distributed differential protection module configured for each terminal needs to quit protection under the following conditions:
(1) when the terminal web server acquires the cloud server information, the distributed differential protection function exits, and local protection is put into use;
(2) when the configuration information of the peripheral terminal is acquired, the distributed differential protection function exits, and the local protection is put into use;
(3) when the distributed differential protection module generates channel mapping and protection fixed values, all protection functions exit;
(4) the distributed differential protection function exits without clock synchronization and unifies the terminals of the internal localUTC time scale, and the local protection is put into operation.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729563A (en) * | 2015-04-08 | 2015-06-24 | 国家电网公司 | Method and system for testing differential protection device based on multi-source data |
| CN104901423A (en) * | 2015-06-21 | 2015-09-09 | 南京南瑞继保电气有限公司 | Transmission time mark wide area phasor differential protection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104729563A (en) * | 2015-04-08 | 2015-06-24 | 国家电网公司 | Method and system for testing differential protection device based on multi-source data |
| CN104901423A (en) * | 2015-06-21 | 2015-09-09 | 南京南瑞继保电气有限公司 | Transmission time mark wide area phasor differential protection method |
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