项目管理中的成本管理教程，清华大学博士刘伟出品-Project Management Cost Management Guide, Tsinghua University, Dr. Liu Wei produced

本文首先介绍了电力系统的潮流计算的过程和方法步骤，然后建立模型进行仿真-This paper introduces the trend of power system and methods of computation steps in the process, and then build the model for simulation