Research On Evaluation Of Area Power Network Building Scale Based On Grey Theory And System Realization

With the increase of power consumption and load in recent years, the electrical network construction lag problem becomes more and more serious. In order to alleviate the strained situation, our country began to strengthen the electrical network construction. On the one hand , vigorously develops ultra high voltage direct current power transmission system; on the other hand, also unceasingly strengthens the area power network, which usually refers to 110kV and below distribution network, construction investment arises fast. In order to scientifically assign and use the construction fund, the power network planning department urgently needs to objectively and accurately evaluate the area power network construction scale on macroscopic.In order to evaluate the scale of area power network, the paper has established the evaluate indices system, which includes"the scale indices set"(such as transforming capacity, line-length, and so on) and"the influence factors set"(such as social power consumption, highest load, population, etc). By means of grey relational analysis technology, the rule between the scale indices and the influence factors is analyzed based on massive statistics annuals. The paper systematically research the influence of grey relation operator and distinguishing coefficient on the results obtained by gray relation analysis, and present the criteria and practical methods determining these coefficients. Analyzes the development tendency of indices with the development coefficient and the average increasing rate, and take this as the foundation, the area network scale evaluation unified model is made, using network developing concordant coefficient to evaluate the reasonable degree of area power network. Take GM(1,1), GM(1, N) and the multi-variable gray optimization model as the main tools, this paper established mathematical models for each scale index, used these models to reveal the law of their development and mutually affect, and these models were used to forecast the ideal level of area power network in the future , the results provide the decision-making reference for the electrical network plan. In the end, the evaluation system of area power network building scale based on Visual Studio.NET developing environment is developed. Considering the characteristics of power system and applying the novel network technology, the system uses the C/S and B/S mixed mode based on intranet and internet. In the design of this system, UML is used to realize the requirement analysis and descript the static structure model and dynamic action model of the system. The operation of the system proves its high safety and compatibility; it is improving the informational level of power enterprise and the efficiency of power network development and planning.