powerflow
代码说明：
潮流计算牛拉法和PQ分解法有详细解析，电力系统的基本潮流都有解析，纯手工(Flow Calculation cattle Rafah and PQ decomposition method has a detailed analysis)
文件列表：
powerflow
.........\case118.m,29698,2012-07-30
.........\case118f.m,33862,2007-03-15
.........\case14.m,4158,2006-11-27
.........\case2383.m,363145,2006-12-05
.........\case2383f.m,340756,2012-07-25
.........\case30.m,4494,2007-06-14
.........\case300.m,62795,2007-01-22
.........\case300f.m,71695,2007-03-23
.........\case39.m,5276,2006-11-27
.........\case5.m,1682,2006-11-30
.........\case57.m,12275,2006-11-27
.........\case6.m,2060,2007-03-14
.........\case9.m,2086,2007-03-14
.........\initial.m,2501,2016-10-14
.........\Jac.asv,5963,2012-07-19
.........\Jac.m,1447,2012-07-24
.........\Jac_Hes0.m,24724,2007-07-06
.........\main.asv,998,2012-07-19
.........\main.m,770,2016-10-14
.........\solvePD.m,2921,2008-03-18
.........\Y_matrix.m,3449,2007-05-14
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