中文摘要：

结合不同类型供电区域（A＋、A、B、C、D、E）典型供电模式的组成特点，根据供电区域未来的发展定位，研究配电网供电模式的建设改造问题．首先提出改进的“最小单位负荷年费用法”-规划年最小费用法，制定不同类型供电区域间典型供电模式升级的过渡方案；然后利用改进的计算方法对过渡方案进行经济性比较，并综合分析各种方案；最后计算得到最佳过渡路径．

英文摘要：

The construction and transformation of power supply modes were explored researched according to the composition of the typical power supply mode in different power supply areas（A ＋ , A, B, C, D, E ） as well as future development orientation. The ＂smallest unit of planning year＂ adapted from ＂smallest unit of load method＂, was proposed at first, to make the transition program for the updating of typical power supply mode in different power supply area. Then transition schemes were economically compared and comprehensive- ly analyzed using modified method of calculation. At last, the optimal transition path was selected to determine its development course of power supply mode by calculating.