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SQL (Structured Query Language) interface implementing method supporting IEC61850 object query

An IEC61850, object technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of grid data management middleware lacking query optimization mechanism, etc., to achieve the effect of unified query interface

Active Publication Date: 2012-12-05
NARI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Traditional power grid data management middleware lacks a unified query optimization mechanism. Due to the use of linear storage methods and linear search strategies, the average query time complexity of the system is O(n) (n is the number of records in the table)

Method used

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  • SQL (Structured Query Language) interface implementing method supporting IEC61850 object query
  • SQL (Structured Query Language) interface implementing method supporting IEC61850 object query
  • SQL (Structured Query Language) interface implementing method supporting IEC61850 object query

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Embodiment Construction

[0035] The technical solution of the present invention will be further elaborated below according to the accompanying drawings, including system architecture, data dictionary management, shared storage mechanism, SQL operator implementation, IEC61850 object query processing and index implementation mechanism.

[0036] 1. System Architecture

[0037] The architecture of the system is as figure 1 As shown, its core part is the shared storage mechanism of data dictionary and index module. The data dictionary is used to describe metadata information, and the index uses an independent data structure for description and management (see the description in the index section for details). The system process and the application program process are in different process spaces. In order to enable each application program to use the data service provided by the system, the present invention manages the main memory space by means of a shared storage space.

[0038] 2. Data dictionary

[...

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Abstract

The invention discloses a SQL interface implementing method supporting IEC61850 object query. A power grid system comprises the following functional modules: a data storage module: a data model is established according to IEC61850 objects in the power grid system; an inquiry module: expanding existing SQL operators based on the IEC61850 objects, and a hierarchical operating operator suitable for the objects is established according to the data model; a main memory management module: a main memory management module stored for supporting the objects is implemented in a manner of shared memory, including allocation, release and mapping of the shared memory and use and management of the shared memory; and an index module: including space management of index, consistency maintenance and interface offered to the inquiry module. The invention provides a declarative SQL inquiry interface supporting IEC61850 object query, thereby realizing fast index and management for hierarchical objects andrelationship-type data in the power grid.

Description

technical field [0001] The invention belongs to the field of power grid digital management, provides a declarative SQL query interface supporting IEC61850 object query, and realizes fast retrieval and management of hierarchical objects and relational data in the power grid. Background technique [0002] The management of real-time data in the power grid is the key technology to realize the intelligence of the power grid. The real-time data in the power grid includes traditional relational data and IEC61850 object type data unique to power grid management. The management of these data refers to the establishment of a real-time The required data management platform provides users with data retrieval and data management functions, allowing users to work on high-level data structures. [0003] Traditional power grid data management middleware is based on relational and IEC61850 object-based embedded real-time database management systems, using cross-platform C / C++ programming, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
Inventor 张海滨潘洪湘张进伟秦小麟朱广蔚郑桂能
Owner NARI TECH CO LTD