The Research And Development Of The System Of Load Modeling Online Based Component

Power system comprehensive load modeling is an important research topic in the field of power system analysis. Component-based approach and Measurement-based approach are two most basic and important methods of load modeling. In Component-based approach, investigation and statistics of load characteristics are very important basic works. It spends huge time and manpower in traditional survey, as well as many other limitations, therefore, the accuracy of the survey results is difficult to ensure. Also because investigation and statistics of load composing characteristics and station industry composing characteristics are stationary, the result of investigation and statistics can not reflect operaional condition of actual loads which are time-variable. In view of this, the modeling online based Component-based approach is a very important and exigent work in current loading modeling research.The main content of this paper is the research and development of the system of load modeling online based on component. The points of this article focus following four aspects:firstly, the author puts forward the thought of load modeling online based on component and points out that the load modeling online based Component-based approach has two key points to be solved, one is the proper classification and effective integration of customers'daily load profile, the other is industry composition ratio of daily load profile in substation. Secondly, the author describes the study of the classification and comprehensive online method in power consumer industry based on daily load profile. Applying the theory of fuzzy C means clustering and pattern recognition, the author classifies and selects customers on the basis of active power in order to obtain industry synthetical daily load curve and eigenvalue parameters that they can describe industry synthetical characteristics. Thirdly, the author designs and develops a set of information integration system of electric power load composition characteristics based on wide information internet, because traditional methods of the survey of electric power load composition characteristics are too complicated and time-spent to apply easily in load modeling engineering. This system can not only completely take place of traditional manpower-sports ways to survey, but also can reduce workers'burdens in high degree. Consequently, easily and effectively finishing outside investigation and management provides stable datum assurance for load modeling based on component. At the same time, the acquisition system can collect real-time data of customers'daily load profile. Fourthly, the author develops a set of load modeling platform based on component, which used object-oriented industry-level compiler VC++ framework to build the DLL methods and the ADO database operations technology, and used Access database and SQL Server database as underlying data base. Load modeling based on component will become practical, maneuverable and networking under this system, theory and its measures faced to engineering are realized efficiently to supply favorable synthesis load model for Digital Simulation of power system.Currently, the study of the classification and comprehensive online method in power consumer industry based on daily load profile, datum integration system of load composing characteristics based on C/S mode and load modeling platform based on component are have been realized in this paper. Through experimental running debugging in power grid of Hunan Province, the platform comes out that it is stably and practical.