The Visual Calculation And Management System For Line Losses In Power Distribution Networks

The distribution network is connected with users directly, have the characteristics that the circuit is distributed widely , the voltage is low in grade , the equipment is in large quantity as the end of the power network . The line losses of the power distribution network occupies sizable proportion of the whole power network's losses. As the marketization of power industry , the electric energy consumption is more and more closer linking up with economic benefits.The line loss is a comprehensive economy, technical target aim. It can not only reflect the structure of the distribution network and rationality of operation , but also reflect technology and management level of electric enterprises.And it can also impel electric enterprises to take measures of decreasing line losses, improve the economic benefits of electric enterprises. Simple, swift and effective line losses calculation and analytical method will help to looking for the main factor of line losses , mastering the variation tendency of the line loss, improve the line loss management, reduce the line loss to the minimum limit and promote the realization of the whole power network's economical operation finally.Geographical information system is produced from computer technology and information technology which are used in geographical science. Today it has been extensively applied to environmental monitoring, urban layout and management, social investigation and statistical analysis, the analysis of social economy, land management, traffic and pipeline etc, involving a lot of disciplines and fields which having closely related with space information.With the development of computer technology, the geographical information system softwares, such as Maplnfo, ARC/INFO , Geostar etc. have been used to the power system.The object of research is a management system combined with figures, which is composed of geographical information system (GIS ) and the management of power distribution network's line losses. It regards Microsoft SQL Server 2000 network database as the database developing platform, uses MapX , Maplnfo to realize figureand data database's automatic setting-up and management, and utilize human-computer interaction of the figured interface to calculate and analyse line losses of the power distribution network.While guaranteeing exact calculation , it also offeres more convenient , swift , ocular inquiry and statistics function , and makes figure , data , calculation , analysis and management into a whole.The research uses the analytical method facing target to investigate the line loss of the distribution network.lt have analysed the deficiency existing in the administrative system of the line loss at present. Because the distribution network has more nodes, many equipment, a lot of branch lines and the data are difficult obtained, on the premise of meeting the precision of engineering calculation , adopts root-mean-squre electric current and power flow to calculate the theory line losses. And it has designed and proposed the mathematics model meeting the characteristic of the distribution network. It also gives samples to compute and analyse two results of calculation and can get the satisfactied results through verifying.lt points out the impact on line loss accuracy of computing technology and analyse the possible reasons.