Research On Influencing Factors And Evaluation Indexes Of DC Distribution Voltage Grade

The AC power distribution network have a number of problem, so the superiority of the DC power distribution network has aroused much concern and these ideas or proposals to structure the DC distribution power network have been proposed. As the innovation or change of the new generation of the power network, The DC distribution power network will cause a series of problems which need to be researched and solved. These problems include the manufacture of DC electrical equipment and appliances, DC wires and cables and many other equipment and products, the theory and method about the planning&construction and operation of the DC distribution and DC power network. Among these problems, the voltage class is the foundation of the large research, but we haven’t found any research about the voltage class or the theory and method to evaluating it.This paper have expounded the necessity to research the voltage class of the DC distribution, then analyzing the external and internal influence factors of the voltage class of the DC distribution from the social development, the economic development, the load and power supply, the operating economy and the system security, getting the source of the influence factor on the voltage class. Having analyzed the influence factor of the voltage class of the DC distribution stratified with the interpretative structural modeling and cleared the direct acting factor of the voltage class, gotten the influence path of the influence factor and the relation between the voltage class and the influence factor. On this basis we have researched the evaluation index of the he voltage class of the DC distribution, analyzed and proposed the evaluation content, evaluation index and evaluation methodology of the economy and reliability. This paper has proposed the evaluating requirement and recommendation which about the voltage class of the DC distribution from the load development, electrical connection, technique and equipment. At the end, this paper proposed a comprehensive evaluation process to the voltage class of the DC distribution.