WO2020048395A1

WO2020048395A1 - Method and system for access between main station and sub-station of power grid

Info

Publication number: WO2020048395A1
Application number: PCT/CN2019/103689
Authority: WO
Inventors: 张鸿; 姚志强; 姚建国; 杨胜春; 于芳; 庄卫金; 黄海峰; 苏大威; 徐春雷; 赵家庆; 吕洋; 杨争林; 刘晓梅; 窦仁辉; 孙名扬
Original assignee: 中国电力科学研究院有限公司; 国家电网有限公司; 国网江苏省电力有限公司; 国网江苏省电力有限公司苏州供电分公司
Priority date: 2018-09-07
Filing date: 2019-08-30
Publication date: 2020-03-12
Also published as: CN109413141A; CN109413141B

Abstract

The present application provides a method and system for the access between a main station and a sub-station of a power grid. The method comprises: a main station obtains a data service request of a scheduling center; the main station obtains transformer station service positioning information on the basis of the data service request, and sends the data service request to the sub-station associated with the positioning information; the main station receives data determined according to the service request and returned by the sub-station and sends the data to the scheduling center.

Description

Access method and system between main and sub stations of power grid

This application claims priority from a Chinese patent application filed with the Chinese Patent Office on September 07, 2018 with application number 201811041608.3, the entire contents of which are incorporated herein by reference.

Technical field

The present application belongs to the technical field of electric power dispatch automation, and for example, relates to a method and system for access between a master station and a substation of a power grid.

Background technique

Reliable data exchange between the main and sub-stations of the power grid is an important guarantee for the stable operation of the system in the field of dispatching and transformation. With the advancement and deepening of the construction of smart substations, smart substations have adopted more new technologies and new equipment, and the data interaction requirements between the main and substations have developed from the original "four remotes" to being represented by remote browsing and alarm direct transmission. It integrates multiple data types into one model; at the same time, the data interaction between control centers has also evolved from a simple data forwarding to a complex data exchange model represented by remote access.

The traditional grid data is forwarded step by step through the protocol. Both the master station and the substation end need to be library-to-point, which causes the content to be transmitted to only the "four remote" data, which causes a bottleneck in the use of data between the upstream substation and the downstream control center. A lot of data outside the "four remotes" are stranded inside the station, and it is difficult to provide enough data to support the operation and accident analysis of complex large power grids.

Summary of the Invention

The application provides a method and system for access between main and sub-stations of the power grid, which solves the problem that the content transmitted by traditional substations is limited to "four remote" data, causing a bottleneck in data use between the upstream substation and the downstream control center. It is difficult to provide enough data to support the use of complex large power grid operation analysis and accident analysis.

The present application provides a method for accessing a power grid between a master station and a substation. The method includes:

The master station obtains the data service request from the dispatch center;

The master station obtains substation service positioning information based on the data service request, and sends the data service request to a substation involved in the positioning information;

The master station receives data determined and returned by the slave station according to the data service request, and sends the data to a dispatch center.

This application also provides a method for accessing the main and sub-stations of the power grid. The method includes:

The slave station receives the data service request sent by the master station;

The slave station determines data according to the data service request, and returns the data to the master station.

The present application also provides a master station including a processor and a memory, where the memory includes at least one computer program, and the computer program implements the foregoing method when executed by the processor.

The present application further provides a substation, which includes a processor and a memory, where the memory includes at least one computer program, and the computer program implements the foregoing method when executed by the processor.

The application also provides an access system between the main and sub-stations of the power grid. The system includes:

Transparent access client: The transparent access client is set on the master station and includes: a service access interface module configured to: obtain a data service request from a dispatch center; an information acquisition module configured to: obtain a substation based on the data service request Service positioning information, and send the data service request to the substations involved in the positioning information; a data acquisition module, configured to: receive data determined and returned by the substation according to the data service request, and send the data To the dispatch center that initiated the data service request.

The present application also provides a computer-readable storage medium storing a computer program, where the computer program includes program instructions, and the program instructions implement the foregoing methods when executed by a processor.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic flowchart of an access method between a master station and a substation of a power grid according to an embodiment of the present application; FIG.

FIG. 2 is a principle diagram of access between a master and a slave station of a power grid according to an embodiment of the present application; FIG.

FIG. 3 is a usage diagram of the main and sub stations deployed in this application after implementing a transparent access system;

4 is a schematic flowchart of another method for accessing a power grid between a master station and a slave station according to an embodiment of the application;

5 is a schematic structural diagram of a master station according to an embodiment of the application;

FIG. 6 is a schematic structural diagram of a slave station according to an embodiment of the application.

detailed description

The following describes this application with reference to specific embodiments:

Example 1

As shown in FIG. 1, this embodiment provides a method for accessing a power grid between a master station and a slave station. The method includes:

Step 10: The master station obtains a data service request from the dispatch center.

Step 20: Based on the data service request, the master station obtains substation service positioning information, and sends the data service request to the substations involved in the positioning information.

Step 30: The master station receives data determined and returned by the slave station according to the data service request, and sends the data to a dispatch center.

The above steps are explained below with reference to FIGS. 2 and 3.

For step 10: The real-time transparent access tool between the main and sub-stations of the power grid uses Internet technology to achieve transparent access to the service of the main and sub-stations, so that the station control layer, bay layer devices of the substation, and the control center have multiple types of applications, such as state estimation and data collection. And monitoring and control systems (Supervisory Control and Data Acquisition, SCADA) can provide service-oriented publishing of data resources. Any node in the dispatch data network can access the substation and the control center as long as it has security and permission.

The tools for real-time transparent access between main and sub-grids of the power grid are deployed at the main and sub-sites. Among them, the sub-site is the server for real-time transparent access, the main-site is the client for real-time transparent access, and the server for real-time transparent access Provided services are registered on the global service manager. In this architecture, there is a global service manager, each master station deploys a real-time transparent access client, and each slave station deploys a real-time transparent access server.

For step 20:

The real-time and transparent access tool deployed on the main station provides the acquisition of the plant model, the acquisition of the plant station graphics, the acquisition of the plant telemetry and telemetry data, the remote control of the plant adjustment station, the acquisition of the plant alarm direct transmission information, the remote inspection of the plant station, and the acquisition of the plant. Application service access interface for data services such as station historical data and alarms, and access to plant and station relay protection device information. The dispatching center business application initiates a data service request through the application service access interface of the real-time transparent access client in accordance with the secondary security protection requirements.

The application service interface of the real-time transparent access client determines the type of data service request, and processes it in the manner of distributed business data stream processing and object-oriented data sets:

a) If the data service request is to obtain the model of the plant site and the graphics of the plant site, the data to be transmitted is a file, and the data service request is transmitted as a stream data unit in a general service protocol;

b) If the data service request is to obtain the remote telemetry data of the plant site, obtain the historical data and alarms of the plant site, obtain the relay protection device information of the plant site, remotely adjust the plant station, and obtain the direct transmission information of the plant site alarm, the data to be transmitted To measure data sets, remotely adjust operations, events, and device status, transmit data service requests as object-oriented data sets in a universal service protocol;

c) If the data service request is a remote browsing plant, the first data service request is transmitted to the sub-sites involved in the positioning information in the form of streaming data in the universal service protocol, and the first data request is used to request the plant image file; according to the received The stream data of the plant station image file determines the object data set included in the plant station graphic file; the second data service request is transmitted to the sub-stations involved in the positioning information in the manner of an object-oriented data set in the universal service protocol, and the second data service request Used to request the object data set included in the plant graphic file.

The transparent access data acquisition module of the real-time transparent access client performs global service query to the global service manager, obtains the substation service positioning information corresponding to the data service request of the dispatch master station, and sends the data service request through the client's transparent access data acquisition module. Real-time transparent access to the server side to the corresponding substation.

For step 30:

When the real-time transparent access server deployed at the sub-site receives the data service request, it first queries whether there is a query object in the virtual data pool consisting of the monitoring background resource pool and the smart device resource pool. The query result of the data corresponding to the data service request is returned, and the requested data result is returned; in response to the query result of the data corresponding to the data service request in the virtual data pool, the data is transmitted from the station control layer service or the interval layer service of the substation through the data communication gateway machine. Get the data you need. The data obtained from the station control layer service of the substation is cached in the monitoring background resource pool, or the data obtained from the interval layer service is cached in the smart device resource pool for subsequent data access. Before the data obtained from the station control layer service or the interval layer service is cached in the virtual data pool, objectization processing is needed to meet the unified object modeling requirements of the dispatcher. The data entering the virtual data pool has a life cycle. When the data reaches the end of the life cycle, it is deleted from the virtual data pool. The substation service module returns the objectized data in the virtual data pool to the transparent access data acquisition module of the real-time transparent access client.

The transparent access data acquisition module of the real-time transparent access client receives the service data returned by the real-time transparent access server. If the stream data is returned, the received data is packaged into a file according to the stream data processing method, and the file is returned to the dispatch center business application; if the object-oriented data set is returned, the data set is returned to the dispatch center business application.

In one embodiment, the master station obtaining the data service request of the dispatch center includes: the master station obtains the data service request of the dispatch center through a service access interface provided on the master station.

In an embodiment, the master station acquiring the substation service positioning information based on the data service request and sending the data service request to the substations involved in the positioning information includes: the master station is based on the data service request The data service request inquires the sub-stations of the registered service from the global service manager, obtains the sub-station corresponding to the data service request, and sends the data service request to the sub-station.

In an embodiment, sending the data service request to a sub-station involved in the positioning information includes: if the data service request includes a file, streaming the data service request to a data service in a universal service protocol. To the sub-stations involved in the positioning information in a manner; if the data service request includes a transmission measurement data set, a remote control operation, an event, and a device state, the data service request is The object data set is transmitted to the sub-sites involved in the positioning information; and in the case where the data service request includes a remote browsing factory site, the first data service request is transmitted to the positioning as a stream data in a universal service protocol For the sub-sites involved in the information, the first data service request is used to request a plant site image file; determine the object data set included in the plant site graphic file according to the received stream data of the plant site image file; The data service request is transmitted to the sub-stations involved in the positioning information in the manner of an object-oriented data set in a universal service protocol. Two data service requests are used to request the object data set.

In an embodiment, the sending the data to a dispatch center includes: in a case where the data received by the master station is stream data, packaging the received stream data into a file and feeding it back to a dispatch center service application; In the case that the data received by the master station is an object-oriented data set, the data set is directly fed back to a dispatch center service application.

Referring to FIG. 4, this embodiment further provides an access between a master station and a substation of a power grid. The method includes:

Step 110: The slave station receives a data service request sent by the master station.

Step 120: The slave station determines data according to the data service request, and returns the data to the master station.

In an embodiment, before the slave station receives the data service request sent by the master station, the method further includes: the slave station registers the service provided by itself with the global service manager.

In one embodiment, determining the data according to the data service request and returning the data to the master station includes: the sub station queries whether there is data corresponding to the data service request in the virtual data pool based on the data service request, and responds to the virtual data The query result of the data corresponding to the data service request in the pool already returns the requested data result to the master station; in response to the query result of the data corresponding to the data service request in the virtual data pool, the substation is from the substation through the data communication gateway machine The station control layer or interval layer services obtain data, objectize the acquired data and return it to the master station, and cache the objectized data into the virtual data pool. An access method and system between main and sub-stations of a power grid provided by the present application. The main station obtains a data service request from a dispatch center, obtains substation service positioning information based on the data service request, and sends the data service request to the For the substations involved in the positioning information, the master station receives the data determined and returned by the substation according to the data service request, and sends the data to the dispatch center that initiated the data service request, which solves the problem that the content transmitted by traditional substations is limited to The "four remote" data caused a bottleneck in the use of data between the upstream substation and the downstream control center, and provided all types of data support for sufficient complex large-scale power grid operation analysis and accident analysis.

The application provides a method and system for access between the main and sub-stations of the power grid, which changes the long-term mode of point-to-point data exchange between the substation and the control center, and the traditional protocol to transmit the "four remote" and alarm information modes, thereby realizing the power grid operation data of the substation. And equipment monitoring data is "available on demand."

An access method and system between main and sub-stations of the power grid provided by this application directly provide multiple control centers with physical data service capabilities that meet business requirements, and support the free access requirements of any master station to any substation, thereby improving the control center's The ability to online sense the operation status of the power grid and equipment provides strong support for ensuring the safe, reliable, and economic operation of the power grid, and has significant economic and social benefits for grid dispatch operations.

Referring to FIG. 5, an embodiment of the present application further provides a master station. The master station includes a processor 210 and a memory 220. The memory 220 includes at least one computer program. The computer program is implemented by the processor 210 when implemented in the foregoing embodiment. Either way.

Referring to FIG. 6, an embodiment of the present application further provides a substation, which includes a processor 310 and a memory 320. The memory 320 includes at least one computer program. When the computer program is executed by the processor 310, the implementation in the foregoing embodiment is implemented. Either way.

Example 2

The present application also relates to an access system between a main station and a substation of a power grid, including: a transparent access client, the transparent access client provided at the main station, including: a service access interface module configured to obtain a data service request from a dispatch center; The information acquisition module is configured to acquire substation service positioning information based on the data service request and send the data service request to the substations involved in the positioning information; the data acquisition module is configured to receive substations according to The data is determined and returned by the data service request, and the data is sent to the dispatch center that initiated the data service request.

In an embodiment, the above access system further includes a transparent access server; the transparent access server is disposed at the sub station and includes: an application service interface.

In an embodiment, the application service interface is configured to receive a data service request and send data determined and returned according to the data service request to a data acquisition module.

In an embodiment, the information acquisition module includes a service information positioning unit; the service information positioning unit is configured to perform a query of a sub-site of a registered service to a global service manager based on the data service request to obtain the data service request The corresponding child station, and sends a data service request to the child station.

In an embodiment, the above system further includes a data query module. The data query module is configured to query whether there is data corresponding to the data service request in the virtual data pool based on the service request, and responds to the data in the virtual data pool. There is a query result of the data corresponding to the data service request, and the requested data result is returned to the master station; in response to the query result of the data corresponding to the data service request in the virtual data pool, the data is transmitted from the substation station control or interval layer through the data communication gateway machine The service obtains the data, and returns the obtained data to the master station after being objectified, and caches the objectized data into a virtual data pool.

The data acquisition module includes: a data acquisition unit and a data return unit; the data acquisition unit is configured to receive data determined and returned by the sub station according to the data service request; and the data return unit is configured to receive data from the master station in the case of streaming data, The received stream data is packaged into a file and fed back to a dispatch center service application; in a case where the data received by the master station is an object-oriented data set, the data set is directly fed back to the dispatch center service application.

Those skilled in the art should understand that the embodiments of the present application may be provided as a method, a system, or a computer program product. Therefore, this application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, this application may use one or more computer-usable storage media (including, but not limited to, magnetic disk storage, compact disc read-only memory (CD-ROM) containing computer-usable program code). , Optical storage, etc.).

This application is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It should be understood that each process and / or block in the flowcharts and / or block diagrams, and combinations of processes and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, so that the instructions generated by the processor of the computer or other programmable data processing device are used to generate instructions Means for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a particular manner such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device, the instructions The device implements the functions specified in one or more flowcharts and / or one or more blocks of the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing device, so that a series of steps can be performed on the computer or other programmable device to produce a computer-implemented process, which can be executed on the computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

Claims

An access method between main and sub stations of a power grid, including:

The master station obtains the data service request from the dispatch center;

Obtaining, by the master station, substation service positioning information based on the data service request, and sending the data service request to a substation involved in the positioning information;

The master station receives data determined and returned by the slave station according to the data service request, and sends the data to the dispatch center.
The method according to claim 1, wherein the master station obtaining a data service request from a dispatch center comprises:

The master station obtains a data service request from the dispatch center through a service access interface provided on the master station.
The method according to claim 1 or 2, wherein the acquiring, by the master station, service station positioning information based on the data service request, and sending the data service request to a substation involved in the positioning information, comprises:

The master station queries the global service manager for registered sub-stations of the service based on the data service request, obtains the sub-station corresponding to the data service request, and sends the data service request to the sub-station.
The method according to any one of claims 1-3, wherein the sending the data service request to a sub-station involved in the positioning information comprises:

If the data service request includes a file, transmitting the data service request to a substation involved in the positioning information in a manner of streaming data in a universal service protocol;

In a case where the data service request includes transmission of a measurement data set, remote control operation, event, and device status, transmitting the data service request to the positioning information in an object-oriented data set manner in a universal service protocol involves Sub-station

In a case where the data service request includes remote browsing of a plant site, the first data service request is transmitted to the sub-sites involved in the positioning information in a manner of streaming data in a universal service protocol, and the first data service request is used for the request Plant station image file; determining the object data set included in the plant station graphic file according to the received stream data of the plant station image file; transmitting the second data service request to the object-oriented data set in the general service protocol to The secondary station related to the positioning information, and the second data service request is used to request the object data set.
The method of claim 4, wherein said sending said data to said scheduling center comprises:

If the data received by the master station is stream data, package the received stream data into a file and feed it back to a dispatch center service application;

In the case that the data received by the master station is an object-oriented data set, the data set is directly fed back to a dispatch center service application.
The method of claim 2, wherein the service access interface comprises:

Obtain the plant model, obtain the plant station graphics, obtain the plant remote telemetry data, remotely adjust the plant station, obtain the plant alarm direct transmission information, browse the plant remotely, obtain the plant historical data and alarms, obtain the plant relay Application service access interface for protection device information data service.
An access method between main and sub stations of a power grid, including:

The slave station receives the data service request sent by the master station;

The slave station determines data according to the data service request, and returns the data to the master station.
The method according to claim 7, before the sub-station receives the data service request sent by the master station, further comprising:

The slave station registers the service provided by itself on the global service manager.
The method according to claim 7 or 8, wherein the sub-station determines data according to the data service request and returns the data to the master station comprises:

The sub station inquires whether there is data corresponding to the data service request in the virtual data pool based on the data service request, and responds to a query result of data corresponding to the data service request in the virtual data pool, Return the requested data result to the master station;

In response to the query result of no data corresponding to the data service request in the virtual data pool, the substation obtains data from the control layer or bay layer service of the substation station through the data communication gateway machine, and the obtained data object And returning to the master station after the data processing, and buffering the data after the data processing into the virtual data pool.
A master station includes a processor and a memory, where the memory includes at least one computer program, and the computer program, when executed by the processor, implements the method according to any one of claims 1-6.
A substation includes a processor and a memory, where the memory includes at least one computer program, and the computer program, when executed by the processor, implements the method according to any one of claims 7-9.
An access system between main and sub stations of a power grid, including:

Transparent access client: The transparent access client is set on the master station and includes:

The service access interface is set to: obtain a data service request from the dispatch center;

The information acquisition module is configured to acquire substation service positioning information based on the data service request, and send the data service request to a substation involved in the positioning information;

The data acquisition module is configured to receive data determined and returned by the sub station according to the data service request, and send the data to the dispatch center.
The system according to claim 12, further comprising: a transparent access server;

The transparent access server is provided at the sub station and includes an application service interface configured to receive the data service request and send data determined and returned according to the data service request to the data. Get the module.
The system according to claim 12 or 13, wherein the information acquisition module comprises a service information positioning unit;

The service information positioning unit is configured to perform a query of a sub-station of a registered service to a global service manager based on the data service request, obtain a sub-station corresponding to the data service request, and send the data service request to all Shuzi station.
The system according to any one of claims 12 to 14, further comprising: a data query module;

The data querying module is configured to query whether there is data corresponding to the data service request in a virtual data pool based on the service request, and respond to a query for data corresponding to the data service request in the virtual data pool. As a result, the requested data result is returned to the master station; in response to the query result for the data corresponding to the data service request in the virtual data pool, it is obtained from the substation station control layer or bay layer service through the data communication gateway machine Data, objectizing the acquired data and returning it to the master station, and buffering the objectized data into the virtual data pool;

The data acquisition module includes a data acquisition unit and a data return unit; the data acquisition unit is configured to receive data determined and returned by the slave station according to the data service request; and the data return unit is configured to receive data received by the master station When the data is stream data, the received stream data is packaged into a file and fed back to a dispatch center business application; when the data received by the master station is an object-oriented data set, the data set is directly fed back to Scheduling center business applications.
A computer-readable storage medium stores a computer program, where the computer program includes program instructions that, when executed by a processor, implement the method according to any one of claims 1-9.