In the power industry, real-time databases are widely used in power generation (especially thermal power generation), transmission, and distribution, providing basic support for data collection, storage, monitoring, and analysis. This paper mainly discusses the real-time database selection test of power grid for transmission and distribution, which involves the collection, storage, query and analysis of power consumption data of the power grid.
According to the characteristics of grid power consumption data points, data throughput, system stability and reliability requirements, the test points of real-time database include the following aspects:
1) The maximum number of tag points supported by the system: The maximum number of tag points supported by the real-time database determines the scope and capabilities of the database.
2) Data writing speed: Because data collection has periodicity, data writing must be completed within one acquisition cycle to ensure that data will not be lost, and the data writing speed also determines the throughput of the database.
3) Data query time: including real-time data query response time and historical section query response time. The response time of real-time data query mainly investigates the response time of querying the real-time value of single/multiple tag points; the response time of historical section query mainly investigates the response time of the historical value of single/multiple tag points at a certain moment.
4) Abnormal situation processing ability: In the data collection process, you may encounter abnormal situations such as network interruption and database service stop, but ensure that the collected data is not damaged or lost. Once the network and database are restored, it can be stored in the database. And does not affect the collection of real-time data.
5) Stability and reliability of the database: Under normal circumstances, data collection is periodically written according to a certain frequency. In order to enable the data to be correctly stored in the database, the database must be continuously operated without stopping, so the database is required to be stable and reliable.
Based on the above analysis, in addition to the functionality of the real-time database, it is also necessary to focus on its performance, reliability, stability and other characteristics.
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