CN105740296B - Intelligent substation data subscription method based on access model - Google Patents
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Abstract
The invention relates to an intelligent substation data subscription method based on an access model, which predefines the access model, provides a complete information access mechanism in a mode of a service interface plus the access model, and directly accesses a data structure by an external application module through the access model. The mapping between the access model and the internal data structure of the platform is realized by the platform, the platform and the external module can appoint the content to be expanded by themselves, and the dynamic customization of the external application module to the platform data can be realized. The data subscription mode realized by the method can realize that the advanced application module obtains the system platform data, and can also realize the data acquisition and information interaction between the platforms.
Description
Technical Field
The invention relates to a data subscription method in the field of power system automation, in particular to an intelligent substation data subscription method based on an access model.
Background
IEC61850-6 defines a Substation Configuration description language (subsystem Configuration description L arrangement, SC L) for describing primary equipment, secondary equipment and a communication Configuration model of the Substation, wherein the primary equipment and the secondary equipment are associated through logical nodes (L logical nodes, L N), and the communication Configuration model describes communication parameters of the secondary equipment, and the relationship among the primary equipment, the secondary equipment and the communication Configuration model is tight.
The IEC61850 defines a hierarchical object model comprising logical devices (L logical devices, L D), logical nodes, data objects (DataObjects, DO) and data attributes (DataAttribute, DA), and comprises an information model, a service model and a configuration model, wherein the configuration model is the starting point of engineering, and the information model and the service model are absent without the configuration model, the IEC61850 has small changes to primary devices but revolutionarily affects secondary devices, from the point of view of data-to-information processing, the secondary devices collect measurement data (raw data) of the primary devices, and through computational processing, generate power system operation information (mature data) which is displayed in a human-computer interface of a local monitoring system and forwarded to a primary station such as an energy management system, a protection information management system, an online monitoring system and the like, the raw data is more and more, the requirements for the mature data are relatively unchanged, and the IEC61850 differs from the conventional protocol, not only defines data, but also defines services (operation processes) associated with the data, and the results of any service are called by the client terminals, the client terminals can be updated, the IEC61850 can reflect the changes in a relatively complicated manner that the high-level data can be received by the manufacturer and the high-level data communication process of the enterprise data is finally updated.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an intelligent substation data subscription method based on an access model, the method has strong universality, the access model is predefined by the intelligent substation, and an external application module directly accesses a data structure through the access model. The mapping between the access model and the internal data structure of the platform is realized by the platform, the platform and the external application module can appoint the content to be expanded by themselves, and the dynamic customization of the external module to the platform data can be realized. The data subscription mode realized by the method can realize that the advanced application module obtains the system platform data, and can also realize the data acquisition and information interaction between the platforms.
The purpose of the invention is realized by adopting the following technical scheme:
the invention provides an access model-based intelligent substation data subscription method, which is improved in that a system used in the method comprises an application module and a data platform system, wherein the application module realizes subscription to data of the data platform system through an IEC61850 data service interface; the method comprises the following steps:
(1) determining an access model;
(2) the application module derives an instantiated access model;
(3) checking the access model;
(4) the data platform system accesses the real-time database of the access model;
(5) initializing application module registration and the like;
(6) dynamically refreshing a real-time database of the access model;
(7) establishing an index relation of data in a platform real-time library;
(8) and subscribing and acquiring data.
Further, in step (1), the access model is described by an XM L file, and the method includes:
data type datatypes: datacytes defines the data structure of a substation (station), voltage class (voltagevel), bay (bay), transformer (powertransformer), winding (winding), equipment (equipment), association measurement (measurand), device (IED) (device IED is a variable defined in the program, while IED equipment refers to secondary equipment in the substation), analog (analog), phasor measurement (dynalog), and state (state); each type of data structure comprises an index number (id), a name (name), a reference (reference), a description (description), a parent node index number (parentid) and a type (type) data attribute;
substation structure tree stationrees: defining a transformer substation (station), a primary system structure (primary) and a secondary acquisition model structure (secondary) by using a data structure tree; the primary system structure (primary) comprises data types such as a transformer (powertransformer) and a voltage level (voltage), the transformer (powertransformer) comprises a winding (winding) data type, and the winding (winding) comprises associated telemetry information; the voltage level voltagemevel includes an interval (bay) including each primary equipment (equipment) including a correlation measurement (measurand); the secondary collection model structure secondary comprises each IED device, and the IED devices comprise analog quantity (analog), phasor measurement (dynanalog) and state quantity (state) data types collected by the secondary devices;
the real-time library realizes the horizontal and longitudinal retrieval of the data information through the index number and the index number of the father node; the application module queries the data type datatype through the ICS _ GetTypeInfo and obtains the definition of each field in the datatype.
Further, in the step (2), the application module derives stationres structure in the instantiated access model according to the access model datatypes structure defined by the data platform system, and by combining with the substation configuration, according to the functional requirement of the application module.
Further, in the step (3), the number, name and father node type of the data types in the access model are checked; if the verification is successful, performing the step (4); otherwise, returning to the step (2).
Further, in the step (4), the data platform system analyzes the instantiated access model provided by the application module, establishes a real-time database of the access model, and accesses the real-time database of the access model.
Further, the application module establishes one-to-one correspondence between the access indexes of the data types and the access models and between the access models and the real-time databases of the access models.
Further, in the step (6), according to the IEC61850 reference value of each data type in the access model, the analog quantity, phasor measurement and state quantity data values are obtained from the intelligent substation equipment through the IEC61850 data service interface, and the real-time database of the access model is dynamically refreshed.
Further, in the step (7), each data type collected in the IED device includes an ID number and a parent ID number, and the primary device directly obtains corresponding collected data in the secondary device by associating measured attributes and associating an index ID; the index number ID of each data type is unique for the whole station, so that the index relation of the data in the platform real-time library is formed.
Further, in the step (8), according to the subscription request of the application module, dynamically organizing the data set of the data subscription, and providing the data set for the application module to use by encapsulating a group of IEC61850 data service interfaces, thereby implementing data subscription and acquisition.
Compared with the closest prior art, the technical scheme provided by the invention has the beneficial effects that:
the intelligent substation data subscription method based on the access model provides a uniform cross-process public data access interface and an interactive information access model, and provides a complete information access mechanism in a service interface + access model mode. The main advantages are:
1) the invention standardizes the data structure of information interaction between high-level applications and platforms, and between platforms, separates data from applications, solves the problem that the database structure of each manufacturer is private from bottom layer communication to high-level applications, and is convenient for secondary development of high-level application functions and function expansion of different manufacturers.
2) The data type defined by the access model is adopted, so that the platform and the external module can appoint the content to be expanded by themselves, and the requirement of high-level application function expansion is met.
3) The platform dynamically organizes external modules to order data according to the instantiated intelligent substation access model, and provides a group of data service interfaces to complete the whole data subscription and processing flow, so that the data access processing efficiency is improved.
4) By adopting the mode of the access model and the service interface, the data access users (external application modules) have one-to-one correspondence with the access model and the platform access model real-time library, and the requirement on the platform data access safety is met.
Drawings
FIG. 1 is a diagram of an access model-based data service framework provided by the present invention;
FIG. 2 is a data subscription process based on access model provided by the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The invention provides an access model-based intelligent substation data subscription method, wherein a system used in the method comprises an application module and a data platform system, wherein the application module realizes subscription of data of the data platform system through an IEC61850 data service interface; the data service framework diagram based on the access model is shown in fig. 1, wherein the application module comprises a data subscription and processing module and a model processing module; the model processing module is connected with the access model; the data platform system comprises an IEC61850 data service interface, an access model real-time database, a platform real-time database and IED equipment; the data subscription and processing module performs data interaction with the access model real-time database through an IEC61850 data service interface; accessing the model real-time database and performing data interaction with the platform real-time database; the application module and the data platform system both acquire the SCD file from the transformer substation model configuration tool.
As shown in fig. 2, a data subscription process based on an access model first defines data types (datacopes) of a substation according to a substation configuration description language defined by IEC61850-6 and a hierarchy of the substation, primary and secondary devices, voltage levels, and intervals. The defined data types include data structures of substation (station), voltage class (voltagelevel), bay (bay), transformer (powertransformer), winding (winding), equipment (equipment), association measurement (measurement), device (ied), analog (analog), phasor (dynanalog), and state (state); each type of data structure comprises an index number (id), a name (name), a reference (reference), a description (description), a parent node index number (parentid) and a type (type) data attribute;
the data structure tree types describing the access model by adopting the XM L file comprise a substation (state), a primary system structure (primary) and a secondary acquisition model structure (secondary), wherein the primary system structure (primary) comprises data types such as a transformer (powertransformer) and a voltage level (voltage level), the transformer (powertransformer) comprises a winding (winding) data type, the winding (winding) comprises information such as associated telemetry, the voltage level comprises an interval (bay), each primary device (equipment) is contained in the interval, associated measurement (measurement) is contained in the equipment, the secondary acquisition model structure secondary comprises each IED equipment, analog quantity (analog) acquired by the secondary equipment, phasor measurement (dynalog) and state quantity (state) are contained in the IED equipment, each data type acquired by the IED comprises an ID number and a type ID number, and attributes of the primary equipment can be acquired through the associated measurement, and the secondary acquisition model structure is directly obtained through the corresponding data types of the secondary acquisition model, so that the data types of the IED are unique index ID numbers and the secondary acquisition model structure is a unique index ID database.
And after the platform successfully checks the access model of the application module, generating a platform real-time library according to the data organization form of the access model. And establishing an index relationship of the data according to the index number of each data type and the index number of the father node. The application module can query a data type datatype through a data type information query interface ICS _ GetTypeInfo, acquire the definition of each field in the datatype, acquire needed real-time data of the transformer substation according to a data access interface provided by a platform, and realize high-level application and platform and data access between platforms.
The method specifically comprises the following steps:
(1) determining an access model;
referring to a hierarchical object model of logical devices (L logical devices, L D), logical nodes, Data Objects (DO) and Data Attributes (DA) in IEC61850, the access model of the invention adopts XM L file description and is divided into stationres and datatypes.
The stationtres defines a substation (station), a primary system structure (primary) and a secondary collection model structure (secondary) in a tree structure; primary system structure primary is divided according to powertransform and voltageLevel, which is further expressed according to bay, equipment and measurand. The secondary collection model secondary is divided according to the belonged IED equipment, and comprises attributes such as analog, dynanalog and state.
datacypes define the data structures of specific substations (states), voltage levels (voltagelevel), bays (bay), transformers (powertransformers), windings (winding), equipment (equipment), equipment measurements (measurement), devices (ied), analog quantities (analog), phasor measurements (dynanalog), state quantities (state), and the like. Each type of data structure includes data attributes such as index number (id), name (name), reference (reference), description (description), parent node index number (parentid), type (type), and the like. And the horizontal and vertical retrieval of the data information is realized through the index number and the index number of the father node.
The datatype definition is obtained through a GetTypeInfo interface function, and the definition of each field in the datatype is obtained through GetFieldInfo. Other data service interfaces are shown in table 1 below:
TABLE 1 data service interface function table
| Interface name | Interface function |
| SAS_SubscribeData | Data subscription |
| SAS_UnSubScribe | Canceling data subscription |
| SAS_GetObjType | Obtaining object types |
| SAS_GetTypeInfo | Obtaining data type information |
| SAS_GetChildTypes | Obtaining object subtype information |
| SAS_GetFieldInfo | Obtaining data field information |
| SAS_GetParentObject | Obtaining a parent object |
| SAS_GetChildObjNum | Obtaining the number of child objects |
| SAS_GetChildObjects | Obtaining a list of child objects |
| SAS_QueryDataNum | Number of data inquired |
| SAS_QueryData | Querying a data set |
| SAS_GetValueByID | Reading the value of a field specified by an object set by ID |
| SAS_GetValueByName | Reading values of fields specified by object sets by name |
| SAS_SetValueByID | Values for specified fields of a write object set |
| SAS_GetHisValueByID | Querying historical data for objects over a specified time period |
(2) The application module derives an instantiated access model:
the external application module is used for deriving an instantiated stationmodels according to the datatypes access models defined by the system platform and the Substation Configuration (substistition Configuration Description) and according to the functional requirements of the external application module. The Stationtrees model comprises basic attributes such as index numbers of subscription data types of various data types (datacytes) and information of IEC61850 references (references).
(3) Checking the access model;
and checking the number, the name and the father node type of the data types in the access model. If the verification is successful, performing the step (4); otherwise, returning to the step (2).
(4) The data platform system accesses the real-time database of the access model:
and the platform analyzes the instantiated access model provided by the external application module, establishes a real-time database of the access model and accesses the real-time database.
(5) Initializing an application module;
(6) dynamic refresh access to a real-time database of models:
and according to the IEC61850 reference value of each data type in the access model, acquiring data values such as analog quantity, state quantity and the like from intelligent equipment of the intelligent substation through the IEC61850 service interface, and dynamically refreshing a real-time database of the access model.
(7) Establishing an index relation of data in a platform real-time library: the platform establishes the index relation of various data in the platform real-time library through the index numbers of the index numbers, the father index numbers, the primary and secondary equipment association index numbers and the like of various data types in the access model.
(8) Data subscription and acquisition: and dynamically organizing a data set of data subscription according to the subscription request of the external application module, and providing the data set for the external application module to use by packaging a group of data service interfaces so as to realize the data subscription and acquisition process.
The invention provides an access model-based intelligent substation Data subscription method, which is characterized in that a primary and secondary Data Object definition and access model establishment method of an intelligent substation is adopted according to a definition mode of IEC61850 about a hierarchical Object model of logic equipment (L logical Device, L D), logic nodes, Data Objects (DO) and Data Attributes (DA). after an access model is imported, an intelligent substation system platform adopts a group of Data service interfaces matched with the access model Data structure definition to realize subscription and acquisition of platform Data by an external application module.
Finally, it should be noted that: although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can make modifications and equivalents to the embodiments of the present invention without departing from the spirit and scope of the present invention, which is set forth in the claims of the present application.
Claims (1)
1. An access model-based intelligent substation data subscription method is characterized in that a system used in the method comprises an application module and a data platform system, wherein the application module realizes subscription to data of the data platform system through an IEC61850 data service interface; the method comprises the following steps:
(1) determining an access model;
(2) the application module derives an instantiated access model;
(3) checking the access model;
(4) the data platform system accesses the real-time database of the access model;
(5) initializing application module registration and the like;
(6) dynamically refreshing a real-time database of the access model;
(7) establishing an index relation of data in a platform real-time library;
(8) subscribing and acquiring data;
in the step (1), the access model is described by using an XM L file, and the method includes:
data type datatypes: datatypes define data structures of substation station, voltage level voltagelevel, interval bay, transformer powertransformer, winding wiring, equipment, correlation measurement measurand, device ied, analog quantity analog, phasor measurement dynalog and state quantity state; each type of data structure comprises an index number id, a name, a reference, a description, a father node index number parentid and a type data attribute;
substation structure tree stationrees: defining a substation station, a primary system structure primary and a secondary acquisition model structure secondary by using a data structure tree; the primary system structure primary comprises a transformer powertransform and a voltage level voltagelevel data type, the transformer powertransform comprises a winding drawing data type, and the winding drawing comprises associated telemetry information; the voltage level voltagelevel comprises an interval bay, the interval bay comprises each primary equipment, and the equipment comprises an association measurement measurand; the secondary acquisition model structure secondary comprises IED equipment, wherein the IED equipment comprises analog quantity analog, phasor measurement dynanalog and state quantity state data types acquired by the secondary equipment;
the real-time library realizes the horizontal and longitudinal retrieval of the data information through the index number and the index number of the father node; the application module queries a data type datatype through a data type information query interface ICS _ GetTypeInfo and obtains the definition of each field in the datatype;
in the step (2), the application module derives stationres structures in instantiated access models according to access model datatypes structures defined by the data platform system and the configuration of the transformer substation and according to the functional requirements of the application module;
in the step (3), the number, the name and the father node type of the data types in the access model are checked; if the verification is successful, performing the step (4); otherwise, returning to the step (2);
in the step (4), the data platform system analyzes the instantiated access model provided by the application module, establishes a real-time database of the access model, and accesses the real-time database of the access model;
the application module establishes one-to-one correspondence between the access indexes of the data types and the access models and between the access models and the real-time databases of the access models;
in the step (6), according to IEC61850 reference values of all data types in the access model, obtaining analog quantity, phasor measurement and state quantity data values from the intelligent substation equipment through an IEC61850 data service interface, and dynamically refreshing a real-time database of the access model;
in the step (7), each data type collected in the IED device includes an ID number and a parent type ID number, and the primary device directly obtains corresponding collected data in the secondary device by associating measured attributes and associating index ID; the index number ID of each data type is unique in the whole station, so that an index relation of the data in the platform real-time library is formed;
in the step (8), a data set of the data subscription is dynamically organized according to the subscription request of the application module, and the data set is provided for the application module to use by packaging a group of IEC61850 data service interfaces, so that the data subscription and acquisition are realized.
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