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PSD-BPA 数据格式说明 / Explaining PSD-BPA data format
PSD-BPA 软件仅在其《潮流手册》的「输出格式说明」段简要解释了浮点数的样式（且不完整），这里对其使用的文本数据文件中的数据格式给出补充说明。 PSD-BPA only has the float data format demonstrated (briefly) in its power flow manual, this post gives the necessary supplements to the data format used in its text data files.
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电力系统基础（增补） / Supplements to fundamentals of electrical power systems
本文为 2021-01-28 所做讲座的文稿，以电力计算相关基础知识为主要内容，是对“电力系统基础”讲座的补充。（注：文稿内容仅包括知识点，多数不含详细解释。） This post is the presented script of the lecture given on 2021-01-28, containing the basic knowledge on power systems calculations, is the supplements to the lecture “Fundamentals of electrical power systems”. (Note: The script only contains the key points, most of which are not explained in detail.)