说明：  电力系统潮流计算用户手册PSASP-BPA4.2版本，该文档详细说明了编写本册的目的在于使程序使用者能初步应用该程序解决实际问题，从而有助于程序的推广、开发和应用。目前最新版本 PSD-BPA 潮流程序计算结果输出文件已基本实现汉化。
(Power flow calculation of power system user manual version of PSASP-BPA4.2, the document details the writing of this book aims to enable the user to application of this procedure to solve practical problems, thus promotion, help development program and application. The latest version of the current PSD-BPA power flow program calculation result output file has been basically finished.)