CN110008198B - Database structure and dispatching automation system - Google Patents
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Abstract
The invention provides a database structure and a dispatching automation system, wherein the database structure comprises: the EMS local real-time database is used for receiving and storing real-time data of the dispatching automation system; the model center database is in communication connection with the EMS local real-time database and is used for receiving and storing power grid basic model data; and the power grid operation history database is in communication connection with the EMS local real-time database and is used for receiving and storing power grid operation data of the EMS local real-time database. The dispatch automation system includes the database structure. The scheme of the invention is used for solving the problem of uncertainty of system acquisition and monitoring caused by model replication or reconstruction in the process of updating or upgrading the dispatching automation system software.
Description
Technical Field
The invention relates to the technical field of a database of a dispatching automation system, in particular to a database structure and a dispatching automation system comprising the database structure.
Background
The power grid model is a basic database of dispatching automation system software, and in order to verify the accuracy of the dispatching automation system software, dispatching automation system maintenance personnel need to take a great deal of work to carry out joint debugging of four remote signaling signals of the transformer substation. With the increase of the operation years of the dispatching automation system software and the development of technology, the software is inevitably updated or upgraded, and the traditional method is to copy part of the power grid model or remodel, so that the accuracy of four remote data associated with the power grid model needs to be verified again. Therefore, there is a problem that model replication or reconstruction brings about uncertainty in system acquisition and monitoring.
Disclosure of Invention
The invention aims to provide a database structure and a dispatching automation system comprising the database structure, so as to solve the problem of uncertainty in system acquisition and monitoring caused by model replication or reconstruction in the process of updating or upgrading software of the dispatching automation system.
To achieve the object of the present invention, an embodiment of a first aspect of the present invention provides a database structure of a dispatching automation system, including:
the EMS local real-time database is used for receiving and storing real-time data of the dispatching automation system;
the model center database is in communication connection with the EMS local real-time database and is used for receiving and storing power grid basic model data;
and the power grid operation history database is in communication connection with the EMS local real-time database and is used for receiving and storing power grid operation data of the EMS local real-time database.
Preferably, the model center database includes a main power grid model database and a plurality of standby power grid model databases, the main power grid model database is in communication connection with the EMS local real-time database, and the main power grid model database is used for receiving and storing power grid model data and synchronizing the power grid model data to the standby power grid model database.
Preferably, the model center database includes a main grid operation database and a plurality of standby grid operation databases, the main grid operation database is in communication connection with the EMS local real-time database, and the main grid operation database is used for receiving and storing grid operation data, and synchronizing the grid operation data to the standby grid operation database.
Preferably, the power grid basic model is a public information model which is formed by adding four remote acquisition IDs and control IDs corresponding to power system physical equipment on the basis of a public information model of IEC61970 international standard; the four remote acquisition IDs and the control IDs are fixed attributes of the measurement and control and remote control devices of each station.
Preferably, the grid operation data includes telemetry sampling and alarm logging data.
Preferably, the power grid operation data in the second main data are stored in a mode of coding and associating a power grid basic model, and the data form comprises a plant station ID, a device type ID, a device number ID and a record type ID.
An embodiment of a second aspect of the present invention provides a dispatching automation system, which includes a dispatching automation system database structure according to an embodiment of the first aspect.
The embodiment of the invention has the following beneficial effects:
according to the embodiment of the invention, the independent power grid model center database and the separated power grid operation history database are constructed, the dispatching automation system is updated or systems of different models are accessed without remodelling, and the four-remote information base is reserved, so that the four-remote model expanded by the power grid basic model is used as the independent power grid model center database for maintenance, the coupling with the dispatching automation system is reduced, the influence of the change of application software is avoided, the power grid operation history database is separated independently, the core power grid model base is safer and more reliable, the influence of the coupling is reduced, and the fault tolerance is higher.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a logic diagram of a conventional dispatching automation system for acquiring a power grid model 1+n.
FIG. 2 is a logic diagram of a dispatching automation system acquiring a power grid model 1+M+N according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of an expanded association relationship between classes in a public information model according to a first embodiment of the present invention.
Fig. 4 is a schematic diagram of an association relationship of an extended model device in a first embodiment of the present invention.
Fig. 5 is a schematic diagram of a basic model of a power grid operation data inheritance power grid in accordance with the first embodiment of the present invention.
Fig. 6 is a schematic diagram of a dispatching automation system in a second embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only structures and/or processing steps closely related to the solution according to the present invention are shown in the drawings, while other details not greatly related to the present invention are omitted.
The traditional dispatching automation system adopts a 1+N mode to store data, as shown in fig. 1, namely a local real-time library 1+a history library (redundancy configuration) N, and a local real-time library mechanism enables the system to respond quickly, so that the redundancy configuration reliability of the history library is high. Even if the historic library fails to locally cache the real-time library, the real-time system is not affected and can still be submitted after the failure is recovered. However, the method has the defects that corresponding power grid model data need to be rebuilt after the platform software is changed, the model of each power grid device is connected with the historical data, and the reuse of the historical data can be influenced after the power grid model is rebuilt. The reconstruction of the power grid model means that the accuracy of the model needs to be verified by dispatching automatic four-remote joint debugging again, and the workload of the four-remote joint debugging required by the verification of the power grid model of one city is huge.
Based on the shortcomings of the schema shown in fig. 1, as shown in fig. 2-5, a first embodiment of the present invention provides a database structure of a dispatching automation system, including:
an EMS local real-time database 1 for receiving and storing real-time data of the scheduling automation system;
the model center database is in communication connection with the EMS local real-time database 1 and is used for receiving and storing power grid basic model data;
and the power grid operation history database is in communication connection with the EMS local real-time database 1 and is used for receiving and storing power grid operation data of the EMS local real-time database.
The model center database comprises a main power grid model database 21 and a plurality of standby power grid model databases 22, wherein the main power grid model database 21 is in communication connection with the EMS local real-time database 1, and is used for receiving and storing power grid model data and synchronizing the power grid model data to the standby power grid model database.
The model center database comprises a main power grid operation database 31 and a plurality of standby power grid operation databases 32, wherein the main power grid operation database 31 is in communication connection with the EMS local real-time database 1, and is used for receiving and storing power grid operation data and synchronizing the power grid operation data to the standby power grid operation database.
The power grid basic model is an extended public information model which is formed by adding four remote acquisition IDs and control IDs corresponding to power system physical equipment on the basis of an IEC61970 international standard public information model; the four remote acquisition IDs and the control IDs are fixed attributes of the measurement and control and remote control devices of each station.
Wherein the grid operation data includes telemetry sampling and alarm logging data.
And the power grid operation data in the second main data are stored in a mode of coding and correlating with a power grid basic model, and the data form comprises a plant station ID, a device type ID, a device number ID and a record type ID.
The embodiment provides a novel storage mode of improved EMS data, and the storage data is shown in fig. 2 by adopting a 1+m+n mode, namely, a local real-time library 1+independent power grid model center database (redundant configuration) m+power grid operation history library (redundant configuration) N, and the traditional history database is divided into two parts of power grid model data and power grid operation data. The processing mode has the advantages that the data flow is layered clearly, an independent power grid model is a basic data model of the dispatching automation system, and the data basic standard of the system is formulated without being influenced by software change. The basic data model is a power grid model in a broad sense, not only comprises traditional CIM models such as equipment, topological connection and the like, but also fuses four remote information correlations of substation automation, namely acquisition IDs and control IDs derived on the attributes of the power grid equipment, and the acquisition IDs and the control IDs are added on the basic model. When the dispatching automation system master station software is changed, the construction is only needed on the standard of the power grid basic model library, the re-modeling is not needed, and the power grid historical data can be completely reused. The method has the advantages that the workload of re-verifying the power grid model is saved, meanwhile, the power grid operation historical data storage is not rebuilt due to system change, a large amount of power grid historical operation data sources are accumulated for power grid big data analysis, and the multiple data sources are more beneficial to power grid operation analysis.
Specifically, the model center database of the embodiment adopts a Common Information Model (CIM) standard, and an object-oriented model of common information of an electric power system, namely, a relation between classes, and simultaneously expands four-remote acquisition and control IDs as an expansion model, as shown in fig. 3, so that the model center database has the advantages that the attributes of the plant-side equipment acquisition and control IDs are brought into generalized basic attributes, the plant-side equipment acquisition and control IDs are theoretically allocated with unique information body addresses, and the database storage model center of the fixed attributes is not changed by the change of dispatching automation software. These attributes are associated with the station telemechanical device as unique identification. And downloading a local real-time library of the dispatching automation system software from a model center database, wherein the dispatching automation system is accessed to the generalized power grid basic models and needs to be executed according to the established technical standard.
In this embodiment, the historian of the dispatch automation system is separated into a model center database and a grid operation history database. And (3) constructing a CIM model of a model center database according to IEC61970 international standard, adding a four-remote acquisition ID and a control ID corresponding to the physical equipment of the power system as an extended CIM model, wherein the four-remote acquisition ID and the control ID are fixed attributes of measurement and control and telemechanical devices of each plant station, and integrating the four-remote acquisition ID and the control ID with the physical equipment into the model center database to establish a power grid model digital archive. These fixed model center databases will not be affected by the application scheduling automation system software, which builds on the basis of the model base standards.
In this embodiment, in order to adapt to the requirements of different versions and different models of scheduling automation software, a unified call standard is adopted for the call of the model center database. The physical devices of the electric power system are stored in a database in the form of tables, and the association relation of the classes is described as shown in figure 1 through the entity association relation of the relational database. Three main categories are one-to-one, for example, a breaker only has one station; one-to-many, for example, one main transformer is provided with a plurality of circuit breakers; many-to-many, for example, one ac line may belong to a plurality of stations, and one station may also have a plurality of ac lines. The power grid basic model comprises basic attributes such as equipment types, association relations, topological connection and the like, and the extended four-remote acquisition and control ID and the power equipment adopt a one-to-one relation. The device association of the model center database is shown in fig. 4. The plant equipment and a specific breaker model are described below by means of the structure.
Description of the plant model:
struct factory{
int facID; /(station ID)
char factor [20]; name of station
int Voltage level; voltage class//
int factor_type_id; class ID of station
stuct communication C _ID; communication arrangement
……
}；
Description of the device model:
struct device{
struct factory fac; structure of/(and inheritance station
int facid=fac.facid; successes station ID
int Voltage level; voltage class//
int device_id; device type ID
int dev_id; device number ID
int nodeID1; /(node 1)
int nodeID2; /(node 2)
int collection_id; /(acquisition ID)
Int control_id; control ID
……
}；
Breaker model description:
struct breaker{
struct factory fac; structure of/(and inheritance station
int facid=fac.facid; successes station ID
int Voltage level; voltage class//
int break_id; type ID of circuit breaker
int nodeID1; /(node 1)
int nodeID2; /(node 2)
int collection_id; /(acquisition ID)
int control_id; control ID
……
}；
In the model center database, in order to validate the extended model, i.e. to collect and control the application of the model on the system, the station association attribute communication configuration is added, and stuct communication is described as follows:
struct communication{
int fac_cid; // communication station ID
……
}；
The historian of the traditional dispatching automation system has both model and grid operation history data, and the model and the grid operation history data are stored in the same instance. Whether it is up or logically coupled to a very high degree. The historical data of the power grid operation is increased along with the growth of years, the data volume is increased continuously, capacity expansion and the like are needed if the storage capacity is insufficient, and the model center database and the power grid operation historical database are adopted for shunting technology, so that the data are stored physically and separately, and related coupling is reduced logically. The distribution technology enables the model center database to be safer and more reliable, because the storage capacity is small, the storage space is hardly changed, and after distribution, the independent power grid operation history database enables the transformation of the storage space to be safer, and the data sharing with a third party for power grid operation are also according to safety, and cannot be coupled with the model center database of the dispatching automation system too much.
In this embodiment, the storage mode of the shunted power grid operation history database adopts the association technology of the coding technology and the power grid model, and inherits the basic model of the model center database. The power grid operation data mainly comprises telemetry sampling and alarm records. In the coding manner provided in this embodiment, the record type is added to the power grid operation data according to fig. 5 on the premise of inheriting the basic power grid model (equipment type+equipment number) in the model center database, that is, the data is managed, stored, invoked, etc. in the manner of (equipment type+equipment number+record type). In the specific implementation manner, the global station ID and the equipment type ID are relayed in the model center database, and the equipment of a certain station is composed of the station ID, the equipment type ID, the equipment number ID and the record type ID, so that the searching efficiency is higher by classification, the storage and the management are more standard, and the large data processing is facilitated. For example, a structure for circuit breaker recording is defined as follows:
struct RECORD{
struct factory fac; structure of/(and inheritance station
int facid=fac.facid// legacy station ID
struct device dev; structure of/(and inheritance device
int devID = dev.device_ ID.// legacy device type ID
int device_id=dev.dev_id; device number ID
struct record_typeID; record type ID
time_t timer_time; time of occurrence
……
}；
In this embodiment, the real-time data of the dispatching automation system is obtained through a model center database (M) based on a model library of a local real-time library, and the system needs to be installed down to the local library when running for the first time. After the local real-time library is established, if the model needs to be changed, the local real-time library is submitted to the model center database according to the standard of the model library. The power grid model center database is provided with a plurality of standby libraries, and the main library receives the update information of the real-time library and synchronizes to the standby libraries. And the power grid operation data are shunted to a main library in the power grid operation history database for storage and then are synchronized to a standby library.
When the storage capacity of the power grid operation histories is insufficient and expanded or an abnormality occurs, the independent model center database is not affected at all. When the dispatching automation system is replaced, the model problem is not needed, only the public function reliability of the software is needed to be verified, the power grid topology model, the equipment parameter model and the acquisition and control expansion model which are left in history are subjected to four-remote joint debugging verification by a large number of operation and maintenance personnel, and the problem that the system is changed and re-verified is not needed. The second embodiment of the invention provides a dispatching automation system, which comprises the dispatching automation system database structure in the first embodiment.
As shown in fig. 6, the development of the dispatching automation system software is realized towards the standard direction of low coupling with the power grid model and unified global functions, such as the position-changing response of two position primitives in the unified whole grid, the alarm window on the unified unit position action, the unified primitive remote control operation and the like, and the global functions are factory standards of the dispatching automation software. After the model database is called, the functions are positioned on specific plant station equipment. For advanced application, a hierarchical database needs to be established for controlling safety, the implementation mode is similar to that of a real-time database, a hierarchical database model can be stored on a model database, the PAS parameters and the like can be stored in the model database according to the inherent model attribute for topological connection in a PAS and other network topology multiplexing model databases, the system software is not changed, and the node number of the advanced application is required to be according to the standard of the model database.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (4)
1. A dispatch automation system database structure comprising:
the EMS local real-time database is used for receiving and storing real-time data of the dispatching automation system;
the model center database is in communication connection with the EMS local real-time database and is used for receiving and storing power grid basic model data; the model center database comprises a main power grid model database, a plurality of standby power grid model databases, a main power grid operation database and a plurality of standby power grid operation databases; the main power grid model database is in communication connection with the EMS local real-time database, and is used for receiving and storing power grid model data and synchronizing the power grid model data to the standby power grid model database; the main power grid operation database is in communication connection with the EMS local real-time database, and is used for receiving and storing power grid operation data and synchronizing the power grid operation data to the standby power grid operation database; the power grid basic model is an extended public information model which is formed by adding four remote acquisition IDs and control IDs corresponding to power system physical equipment on the basis of a public information model of IEC61970 international standard; the four-remote acquisition ID and the control ID are fixed attributes of the measurement and control and remote control device of each station;
and the power grid operation history database is in communication connection with the EMS local real-time database and is used for receiving and storing power grid operation data of the EMS local real-time database.
2. The dispatch automation system database structure of claim 1, wherein the grid operation data comprises telemetry sampling and alarm logging data.
3. The dispatch automation system database structure of claim 2, wherein the grid operation data is stored in a coded and associated grid base model, the data forms including a plant ID, a device type ID, a device number ID, and a record type ID.
4. A dispatch automation system comprising the dispatch automation system database structure of any one of claims 1-3.
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