The Development And Design Of Grid Monitoring Database System Based On Virtual Instrument

Along with the deepening of fossil fuel consumption and level of environmental pollution, the demands on new renewable green energy is growing more and more intensely. Solar energy is one of the most environmentally friendly and most potential energy. In view of the characteristics of photovoltaic power plant, in the course of its run it must be backed by a monitoring system. There must be a database management system with high stability and easy operation collected by the monitoring system to provide protection. Therefore, this combination of Lab VIEW platform and SQL Server2008database research develop monitoring database system based on virtual instrument photovoltaic grid power generation,for the safe operation of photovoltaic power plants and power quality monitoring provides data support.This paper first described the basic concept of virtual instrument and database, and analyzed the actuality of the research on photovoltaic power generation and database system at home and abroad, with a focus on the necessity of establishing a monitoring system for photovoltaic grid-connected power generation. Currently used, the comparison and analysis of various tools, combined with application in practical engineering needed to select for this design in the required software tools, and organic combination of SQL Server2008in Lab VIEW. Then, combined with the technology of virtual instrument, network communication and database management, a grid monitoring database system based on virtual instrument is developed. The software programming is expounded, the plans of the client computer and the host computer are particularly introduced, and the main functions of the system are described. The main modules and the key technical measures of the system are explained. In addition, the PC database system can be closely linked with pre-PC database system using DataSocket technology, and data sharing is realized through Internet not confined to the workplace. In order to test system performance, current signal is tested in the lab, to enter the data of the database system for all types of operations, so as to test the function is successful. The test result shows that the system can achieve the function of photovoltaic grid-connected power generation database system for monitoring, and also reach the design requirements of the system.Compared with traditional technologies, the system has the advantages of simple operation, short development cycle, and high processing capacity and extended flexibility, meeting the needs of photovoltaic grid-connected power system monitoring.