该文件是前推回代法程序，只要是解决潮流计算，可以更有效达到预期的效果，希望可以给广大朋友起到一定的帮助。-The document is the forward backward substitution method procedures, so long as to solve the power flow calculation, can be more 有效 desired for Xiao Guo, hope to play some of Ji majority of friends to help.