Distribution network is an important public infrastructure economic and social development, and the low voltage distribution network as the power system and power users directly connected links, the reliability of its operation directly affect the daily lives of residents. To protect the interests of electricity users of electricity, power distribution network construction and transformation is the obligation of power grid enterprises. Low-voltage distribution network planning and design is to make improve the reliability of distribution networks, economy and bring more economic benefits for the power supply enterprises.Low-voltage distribution network is a reflection of the overall development of a regional power grid, and the need to low voltage distribution power grid construction and transformation of the status quo in the area distribution network. Low-voltage distribution network planning is important for the development of power system areas to consider in planning factors influence the distribution network at the same time, the need to consider regional economic policy, residents and so the average consumption level, considering all the factors, in order to do meet the development requirements of the region and the growing demand for electricity distribution network planning residents and the quality of electricity, improve the security and stability of power system operation, the greatest economic benefits for electricity companies. Therefore, low-voltage distribution network planning has important economic and practical significance.With the social and economic development, the level of residential electricity also will increase the speed of low voltage distribution network planning needs to meet the load growth. Although in recent years, the State Grid Corporation for the construction of more and more attention to low-voltage distribution network, invested heavily to transform, we have made some achievements. But the low voltage distribution network development has not yet reached the international advanced level, the presence of unbalanced development of urban rural distribution network, the need to further improve the quality of power supply. Distribution network planning and design needs to consider the integrated development of urban and rural distribution grids, construction of a safe, reliable, high economic efficiency of the distribution network, capable of national economic construction, residential security plays an important role in building the future of smart distribution grids to lay certain foundation.Therefore, from the actual situation of the distribution network, especially in rural areas it is necessary to increase the low voltage distribution power grids construction efforts. In the low voltage distribution network planning and design phase of the project has a large number of low voltage distribution engineering, engineering requires the drawing low voltage distribution design and complete design specification, our designers to create a lot of work. In order to solve the problem of a large number of design drawing and text Based on AutoCAD-VBA develop an implementation plan, chart integration programming design engineering drawings and data, save a lot of drawings for our designers and the time the text is complete, dramatically distribution network planning work efficiency, improve the results of the theoretical distribution planning application level. This article has been basically completed low-voltage distribution network engineering software design, to complete the data entry and checking Low Voltage Engineering, as well as the road map of Low Voltage Engineering, status map, draw the graph transformation, generating the schedules of tower, the schedules of meet the household low pressure and other reports log, and has been used in the actual project. |