Research And Application Of Curve Generator With Estimation Performance For SCADA System

To conveniently reflect the variation trend of data obtained through SCADA system, the proposed generator of the SCADA system has the functions of hybrid curve displaying and curve estimation,which can be used to monitoring the trend of parameters of SCADA. The new curve generator consists of three parts, such as the curve plot, the curve view and the curve estimator.The function of curve displaying is realized by curve configuration and curve view. The hybrid display of the analog variables and sequence events is achieved by accessing database and data processing. Several curve function is provided, such as edit, add, delete, save, and so on. Based on the curve view configuration, the data that called from the database can be displayed on one graph or more graphs.The function of curve estimation is accomplished by the curve estimator which based on the arithmetic of Support Vector Machine, as well as the self-adaptive adjustment of data with the method of Tabu-Search. After training the historical data model, the result of estimation can be displayed in the form of graph. Not only variation trend forecasting of the parameters is obtained but also a few missing data caused by terminal fault or communication channel abnormal can be obtained by the estimator. All of the processes programming are based on MATLAB, which packaged into the VC++ based curve generator,Based on above works, an application software based on VC++ 6.0, SQL Server 2000 and MATLAB is developed. Several examples are given to test the program. The results show that the proposed approach is feasible and practical.