Research and development and application of distribution-network planning calculation & analysis system

At present, the foreign softwares are mainly focused on calculation, analysis and simulation in the grid design field, which is not designed specifically for the field of distribution network planning. In addition, there are still large differences between the foreign demands in developing ideas, applying habits and the domestic distribution system, resulting in the foreign analysis software has not been mature applied in the field of domestic distribution network planning. In China, the distribution network analysis softwares developed by the software developers or universities are also not designed specifically for the field of distribution network planning, which are mainly used for grid dispatching system or operation system. In addition, these softwares are given priority to with stand-alone mode, not for many people working together, which are lack of data interfaces with other application systems. These softwares are not in practical operation because the bad data quality, low commercialization degree, less innovative and poor practicability. The distribution-network planning calculation & analysis system is showed as a professional analysis tool in this article. The system is based on the reliability of the power distribution network planning concept. All kinds of algorithms of analysis in the field of distribution network are integrated in the system which can meet different demands of distribution network planning. The system achieves the data interaction with the other application systems by CIM(common information model) following IEC 61968/61970. The system also supports two kinds of access mode as the client/server (C/S) and browser/server (B/S), which can meet the application requirements of different users. All algorithm modules can well meet the demands of distribution network reliability evaluation, quantitative analysis, technical and economic comparison, planning scheme optimization, and so on. It has been applied in large scale in practical- distribution network planning. The system introduced in this article has strong application value which effectively realizes the function of scientific and lean in distribution network planning.