CN103488726A - Method for establishing unified grid data platform based on WEB-SERVICE - Google Patents

Abstract

The invention discloses a method for building a unified data platform of a power grid based on WEB-SERVICE, comprising the following steps: a) establishing a power grid primary equipment model of a dispatching energy management system and a power grid secondary equipment model of a relay protection and fault information system In the unified data platform; establish the mapping relationship between the primary equipment model and the secondary equipment model in the unified data platform; b) use a unified interface method WEB-SERVICE to interact with the dispatching subsystem for data, and provide model services and real-time data externally Serve. This method can provide each subsystem with a complete, unified, and real-time power grid full model and data, and can realize data interaction between subsystems in a timely manner according to application and business needs, and minimize the gap between dispatching subsystems caused by data interaction. Coupling between.

Description

Method of constructing unified data platform of power grid based on WEB-SERVICE

technical field

The invention relates to a data interaction and modeling method between a unified data platform, a dispatching energy management system, a relay protection and fault information system, and each dispatching subsystem.

Background technique

Power system equipment can be divided into the following two types according to their functions:

1) Primary equipment: equipment used in the main system of power generation, transmission and distribution, such as generators, transformers, circuit breakers, busbars, lines, etc.;

2) Secondary equipment: equipment that controls, protects, detects and measures the work of primary equipment, such as relays, measurement and control devices, wave recorders, automatic control devices, etc.

Among them, the dispatching energy management system is mainly used for the monitoring, analysis, evaluation, dispatching, etc. of the primary equipment of the power system, while the relay protection and fault information system is mainly used for the monitoring, analysis, and evaluation of the secondary equipment of the power system. The two major systems have established a number of subsystems according to their own field characteristics. Each subsystem is a necessary supplement to its main system, providing professional data for its production, evaluation, analysis, maintenance, dispatching, etc., thus forming a foundation for power system information construction. Two branches. In the past, each subsystem was often built independently, and it was only closely related to the branch subsystem. It was difficult to obtain data across branch subsystems. On the one hand, it caused the repeated construction of model data, and on the other hand, it also hindered the development of the analysis and evaluation capabilities of the subsystem itself. .

Take the grid intelligent alarm system as an example. In the past, this system was built on the basis of the dispatching energy management system, which belongs to the analysis subsystem of the primary equipment of the grid. Due to the difficulty in interacting with the relay protection and fault information system, it is difficult to obtain the model data and real-time fixed value data of the secondary equipment of the power grid. On the one hand, the system needs to maintain a set of secondary data models of the power grid by itself; Real-time fixed value data, intelligent alarm is difficult to use the relevant information of secondary equipment for auxiliary analysis.

Take the fixed value setting and checking system as an example. In the past, this system was built on the basis of relay protection and fault information system, which belongs to the analysis subsystem of the secondary equipment of the power grid. Due to the difficulty in interacting with the dispatching energy management system, it is difficult to obtain the model data and online operation data of the primary equipment of the power grid. On the one hand, the system needs to maintain a set of primary model data of the power grid by itself, and on the other hand, it cannot perform online setting and checking of fixed values It can only be studied and analyzed offline, which limits the practicability of this system.

Based on the above analysis, the inventor considers that through a unified data platform, all subsystems can obtain the primary model of the power grid and real-time operation data, relay protection and faults provided by the dispatching energy management system through a unified interface (WEB-SERVICE service) The secondary model of the power grid and real-time fixed value data provided by the information system saves the tedious maintenance work of the power grid model in the past by various subsystems, and this case arose from this.

Contents of the invention

The purpose of the present invention is to provide a method based on WEB-SERVICE for building a unified data platform for power grids, which can provide complete, unified and real-time power grid full models and data to each subsystem, and can realize the integration between subsystems according to the application Data interaction with business needs in a timely manner to minimize the coupling between scheduling subsystems caused by data interaction.

In order to achieve the above object, the solution of the present invention is:

A method for building a unified data platform for power grids based on WEB-SERVICE, comprising the following steps:

a) Establish the primary equipment model of the dispatching energy management system and the secondary equipment model of the relay protection and fault information system in the unified data platform; establish the relationship between the primary equipment model and the secondary equipment model in the unified data platform Mapping relations;

b) Use the unified interface method WEB-SERVICE to exchange data with the dispatching subsystem, and provide model services and real-time data services to the outside world.

The above step a) includes the following detailed content: establish the association relationship between the model attributes of the unified data platform and the keyword attributes of the source database model, and complete the mapping from the source data to the data of the unified data platform. The source database contains the model of the dispatching energy management system Data, model data of relay protection and fault information system; the integration of source data is completed through the automatic association of relevant attributes of the source database, that is, the mapping of primary and secondary equipment of the power grid.

When the above-mentioned unified data platform model is updated, driven by the unified data platform, it requests the grid primary equipment model file from the dispatching energy management system through the WEB-SERVICE interface, and requests the grid secondary equipment model file from the relay protection and fault information system.

The association mapping of the above-mentioned primary and secondary models of the power grid is accomplished through fuzzy matching between the name of the primary equipment of the power grid and the attributes of the secondary equipment of the power grid.

In the above step b), the interface definition and information organization follow the IEC61968 standard, and the model update is driven by each subsystem. Through the model service provided by the unified data platform, each subsystem flexibly invokes the service according to its own needs to update the grid model.

When the above-mentioned subsystems need real-time data or fixed-value data of the power grid, they call the data services provided by the unified data platform.

After adopting the above scheme, the present invention provides a convenient, quick and unified way to connect the primary and secondary equipment models and real-time data of the power grid to the unified data platform of the power grid, and realize the automatic matching and model of cross-system equipment objects Splicing supports data exchange between different manufacturers, different operating systems, and different databases, so that each power subsystem can conveniently and quickly use all kinds of information in the unified data platform of the power grid as the basic data for monitoring and analysis. The present invention has the following characteristics:

(1) The present invention breaks the barriers between the primary and secondary branch systems of the power grid, establishes a unified data platform for the power grid, and provides complete, unified and real-time full model and data of the power grid to each subsystem;

(2) The present invention adopts a global mapping model and a fuzzy matching method to conveniently and quickly solve the problem of mapping power system equipment when two branches are connected to the unified data platform of the power grid;

(3) The present invention provides WEB-SERVICE services to realize data requests of subsystems of different operating systems and different databases, and at the same time, through subscription/publishing message services, the subsystems can perform data interaction in a timely manner according to the needs of applications and services , to minimize the coupling between scheduling subsystems brought about by data interaction.

Description of drawings

Fig. 1 is a schematic diagram of a network architecture applied in the present invention;

Figure 2 is a system data interaction diagram;

Fig. 3 is a schematic diagram of an interactive communication process with a subsystem.

Detailed ways

The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in FIG. 1 , it is a network architecture diagram applied by the present invention, and the computer server of the unified data platform of the power grid is connected with the computer servers of each dispatching system through the network.

The invention provides a method for constructing a unified data platform of a power grid based on WEB-SERVICE. Using WEB-SERVICE as an interface between the unified data platform of a power grid and other subsystems, it solves the problems of different platforms, different databases, and development problems among various systems. For the problem of different languages, the method includes two parts: establishing the model of the unified data platform of the power grid and completing the data interaction with the subsystem.

1. Establish a unified data platform model for the power grid

The establishment of the model is completed through the following two steps: 1) through the XML model file exported from the dispatching energy management system, create a grid primary model of the unified data platform of the power grid; 2) through the XML model file exported from the relay protection and fault information system , create the secondary model of the power grid unified data platform, and automatically judge and establish the mapping relationship with the primary model of the power grid according to its attributes.

Step 1) further includes: Considering that the grid unified data platform is a joint modeling of primary and secondary equipment of the grid, it is necessary to expand the definition of the secondary equipment model on the basis of the original primary model of the grid according to the IEC61970 specification.

protectionEquipment (protection device model) is defined as follows:

attribute name type of data describe name DT_STRING Device model name id DT_STRING ID number version DT_STRING Protector version number wxya DT_STRING Valuation order number setNo DT_STRING fixed value area code keyname DT_STRING device name RefProtectionEquipMdl DT_S_REF_SIM Associated type, pointing to the device type template it belongs to ContainsSettingValue DT_S_ARRAY The associated type, which contains the constants contained in the device ContainsStatus DT_S_ARRAY The type of association, including the amount of action the device contains MemberOfgEquipment DT_S_ARRAY Association type, pointing to the grid primary equipment to which it belongs Contains_Container_SourceID DT_S_DLIST Contains the ID from the data source

protectionSetValue (protection device setting value) is defined as follows:

attribute name type of data describe name DT_STRING name id DT_STRING ID number type DT_ENUM fixed value type value DT_FLOAT Value

protectionAction (protection device action) is defined as follows:

attribute name type of data describe name DT_STRING name

id DT_STRING ID number

Step 2) further includes: complete the modeling of the secondary equipment information of the power grid by analyzing the XML description file derived from the relay protection and fault information system, extract the information related to the primary equipment by summarizing the attributes of the secondary equipment, And according to these information, the corresponding objects are searched in the established primary equipment model of the power grid, and the mapping association between the two is completed. This kind of mapping is a kind of dynamic intelligent mapping, which is completed automatically, and the relay protection and fault information systems do not need to make any changes. The grid unified data platform intelligently adjusts this mapping based on the analysis of its exported XML files.

The XML exported by the relay protection and fault information system follows the IEC61850 standard and mainly includes the following data structures:

An IED (Protective Device) is defined as follows:

attribute name type of data describe name DT_STRING name id DT_STRING ID number stnName DT_STRING The name of the factory station equipName DT_STRING Primary device name

FISSETTING (protective device setting) is defined as follows:

attribute name type of data describe name DT_STRING name id DT_STRING ID number max DT_FLOAT maximum value min DT_FLOAT minimum value default DT_FLOAT default value

FISEVENT (protective device action) is defined as follows:

attribute name type of data describe name DT_STRING name id DT_STRING ID number

Among them, IED has a one-to-one correspondence with protectEquipment, FISSETTING has a one-to-one correspondence with protectSetValue, and FISEVENT has a one-to-one correspondence with protectAction. Step 2) consists of the following three steps:

a) Establish a protective device model. Check the stnName and equipName in the IED. Depending on the manufacturer of the relay protection and fault information system, these two domains may not necessarily be modeled and maintained. If these two domains already exist and are maintained, search in the factory station model in the unified data platform according to stnName, find the corresponding factory station, and then search in the equipment model under the factory station according to equipName to find the corresponding After the primary equipment, establish the corresponding protectEquipment model according to the IED model and associate it with the primary equipment. If these two domains do not exist or are not maintained, stnName and equipName are automatically analyzed based on the name of the IED.

b) Establish protection valuation model. According to the association between FISSETTING and IED, search for the protectEquipment object corresponding to this IED in the unified data platform, establish the protectSetValue object corresponding to FISSETTING, and imitate the association between FISSETTING and IED to establish the association between protectSetValue and protectEquipment.

c) Establish a protection action model. According to the association between FISEVENT and IED, search for the protectEquipment object corresponding to this IED in the unified data platform, establish the protectAction object corresponding to FISEVENT, and imitate the association between FISEVENT and IED to establish the association between protectAction and protectEquipment.

Step a) further includes: due to the construction habit of the relay protection and fault information system, the name of the IED usually includes stnName and equipName in a certain format. For example, the name "500kv Qujiang Substation 220kV Qujie Line A Main Secondary Protection RCS931" can be analyzed through regular expressions to find that the stnName is "Qujiang Substation", the primary equipment name is "Qujie Line A", and the secondary equipment type is "RCS931". In the case that stnName and equipName cannot be obtained, they can be obtained through automatic parsing of the IED name. In addition, due to the difference in the construction habits of the dispatching energy management system and the relay protection and fault information system, there may be slight differences in the names of the two systems of the same plant station, such as "Qujiang Substation", "Qujiang Station", " Qujiang Substation", "500kV Qujiang Substation" and other naming methods, in the unified data platform, are based on the naming of the dispatching energy management system, using regular expressions and fuzzy matching methods, the fault information system corresponding to its name. Furthermore, for the name of the secondary equipment type, the relay protection and fault information system may have various description methods due to different maintenance personnel, such as "RCS931", "RCS-931", "RCS931 line protection", " RCS931" and so on, these problems are effectively solved in the unified data platform, that is, the name description format of the same device type is unified, and the common device type names can be seen in the table below.

2. Data interaction with power subsystems

Considering the cross-platform characteristics and the actual needs of adapting to multiple development languages, the model service and data service of the grid unified data platform are realized by WEB-SERVICE, and the server and client use SOAP protocol for data transmission. The grid unified data platform adopts the information exchange model defined by IEC61968 for data exchange. The information exchange model defined by this standard has a certain degree of versatility, and at the same time, this standard allows custom extensions to the operation interface. Therefore, the grid unified data platform follows the IEC61968 standard in terms of interface definition and information organization, and appropriately expands the operation interface.

In the service communication process, the client sends a service request to the service provider through the implemented Web service client. The service provider receives the service request as the Web server, and sends a response message to the client after processing the service request. During this process, the client waits for the feedback from the server within a limited time. Both parties of the service complete the invocation of the service in synchronous mode.

The following takes the client calling the data service interface GetData as an example, the process is as follows:

1. The client organizes the parameter data passed to the server according to the IEC61968 standard specification

2. The client calls the data exchange interface GetData and sends a data exchange request to the server

3. The server parses the parameter data according to the IEC61968 standard specification, and organizes the feedback data according to the IEC61968 standard specification after the processing is completed

4. The server returns the feedback data to the client

5. The client processes the feedback data

In the present invention, the grid unified data platform serves as a server to provide various services such as grid primary model service, grid primary equipment real-time data service, grid secondary model service, grid secondary equipment real-time fixed value data service, and the like. Each subsystem of the power system writes the client program of the required services according to its own situation, and then calls the services provided by the unified data platform of the power grid to obtain the corresponding data.

The above embodiments are only to illustrate the technical ideas of the present invention, and can not limit the protection scope of the present invention with this. All technical ideas proposed in accordance with the present invention, any changes made on the basis of technical solutions, all fall within the protection scope of the present invention. Inside.

Claims (6)

1. A method based on WEB-SERVICE construction grid unified data platform, is characterized in that comprising the steps: a) Establish the primary equipment model of the dispatching energy management system and the secondary equipment model of the relay protection and fault information system in the unified data platform; establish the relationship between the primary equipment model and the secondary equipment model in the unified data platform Mapping relations; b) Use the unified interface method WEB-SERVICE to exchange data with the dispatching subsystem, and provide model services and real-time data services to the outside world. 2. the method for building the unified data platform of power grid based on WEB-SERVICE as claimed in claim 1, it is characterized in that described step a) comprises following detailed content: set up unified data platform model attribute to source database model keyword attribute The association relationship between the source data and the unified data platform data is completed. The source database includes the model data of the dispatching energy management system, the model data of the relay protection and fault information system; the source data is automatically associated through the relevant attributes of the source database Integration, that is, the mapping of primary and secondary equipment in the power grid. 3. the method for the unified data platform of construction power grid based on WEB-SERVICE as claimed in claim 2, is characterized in that: described unified data platform model is when updating, under the drive of unified data platform, by WEB-SERVICE interface to The dispatching energy management system requests the primary equipment model file of the power grid, and requests the secondary equipment model file of the power grid from the relay protection and fault information system. 4. The method for building a unified data platform for power grid based on WEB-SERVICE as claimed in claim 2, characterized in that: the associated mapping of the primary and secondary model of the power grid passes between the primary equipment name of the power grid and the secondary equipment attribute of the power grid The fuzzy matching is done. 5. The method for building a unified data platform for power grid based on WEB-SERVICE as claimed in claim 1, characterized in that: in the step b), follow the IEC61968 standard in terms of interface definition and information organization, and the model update is performed by each subsystem Driven by the model service provided by the unified data platform, each subsystem can flexibly call the service to update the grid model according to its own needs. 6. The method for building a unified data platform for power grid based on WEB-SERVICE as claimed in claim 5, characterized in that: each subsystem calls the data service provided by the unified data platform when real-time data or fixed-value data of the power grid are needed .

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